[PATCH 00/12] mfd: watchdog: rtc: Add LPC Clocksource driver

[PATCH 00/12] mfd: watchdog: rtc: Add LPC Clocksource driver

[Lee Jones]

ST's Low Power Controller (LPC) controls three devices; watchdog, RTC
and a Clocksource Timer.  Only one of the devices can be used at any
one time, which is enforced by the Device Driver model.

This patchset provides support for the Clocksource driver.  Watchdog
and RTC are already in -next.

Lee Jones (12):
  mfd: dt-bindings: Provide human readable define for Clocksource mode
  clocksource: sti: Provide support for the ST LPC Clocksource IP
  clocksource: sti: Provide 'use timer as sched clock' capability
  clocksource: bindings: Provide bindings for ST's LPC Clocksource
    device
  watchdog: st_wdt: Update IP layout information to include Clocksource
  watchdog: bindings: Supply knowledge of a third supported device -
    clocksource
  rtc: st: Update IP layout information to include Clocksource
  rtc: bindings: Supply knowledge of a third supported device -
    clocksource
  MAINTAINERS: Add the LPC Clocksource to STi maintained driver list
  ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource
  ARM: STi: Enable LPC Clocksource
  ARM: STi: Update platform level menuconfig 'help'

 .../devicetree/bindings/rtc/rtc-st-lpc.txt         |  15 ++-
 .../devicetree/bindings/timer/st,stih407-lpc       |  28 +++++
 .../devicetree/bindings/watchdog/st_lpc_wdt.txt    |  15 ++-
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/stih407-family.dtsi              |   2 +-
 arch/arm/mach-sti/Kconfig                          |   9 +-
 drivers/clocksource/Kconfig                        |  16 +++
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/clksrc_st_lpc.c                | 134 +++++++++++++++++++++
 drivers/rtc/rtc-st-lpc.c                           |   2 +-
 drivers/watchdog/st_lpc_wdt.c                      |   2 +-
 include/dt-bindings/mfd/st-lpc.h                   |   1 +
 12 files changed, 206 insertions(+), 20 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

-- 
1.9.1

[rtc-linux] [PATCH 00/12] mfd: watchdog: rtc: Add LPC Clocksource driver

[Lee Jones]

ST's Low Power Controller (LPC) controls three devices; watchdog, RTC
and a Clocksource Timer.  Only one of the devices can be used at any
one time, which is enforced by the Device Driver model.

This patchset provides support for the Clocksource driver.  Watchdog
and RTC are already in -next.

Lee Jones (12):
  mfd: dt-bindings: Provide human readable define for Clocksource mode
  clocksource: sti: Provide support for the ST LPC Clocksource IP
  clocksource: sti: Provide 'use timer as sched clock' capability
  clocksource: bindings: Provide bindings for ST's LPC Clocksource
    device
  watchdog: st_wdt: Update IP layout information to include Clocksource
  watchdog: bindings: Supply knowledge of a third supported device -
    clocksource
  rtc: st: Update IP layout information to include Clocksource
  rtc: bindings: Supply knowledge of a third supported device -
    clocksource
  MAINTAINERS: Add the LPC Clocksource to STi maintained driver list
  ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource
  ARM: STi: Enable LPC Clocksource
  ARM: STi: Update platform level menuconfig 'help'

 .../devicetree/bindings/rtc/rtc-st-lpc.txt         |  15 ++-
 .../devicetree/bindings/timer/st,stih407-lpc       |  28 +++++
 .../devicetree/bindings/watchdog/st_lpc_wdt.txt    |  15 ++-
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/stih407-family.dtsi              |   2 +-
 arch/arm/mach-sti/Kconfig                          |   9 +-
 drivers/clocksource/Kconfig                        |  16 +++
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/clksrc_st_lpc.c                | 134 +++++++++++++++++++++
 drivers/rtc/rtc-st-lpc.c                           |   2 +-
 drivers/watchdog/st_lpc_wdt.c                      |   2 +-
 include/dt-bindings/mfd/st-lpc.h                   |   1 +
 12 files changed, 206 insertions(+), 20 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

-- 
1.9.1

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[PATCH 00/12] mfd: watchdog: rtc: Add LPC Clocksource driver

[Lee Jones]

ST's Low Power Controller (LPC) controls three devices; watchdog, RTC
and a Clocksource Timer.  Only one of the devices can be used at any
one time, which is enforced by the Device Driver model.

This patchset provides support for the Clocksource driver.  Watchdog
and RTC are already in -next.

Lee Jones (12):
  mfd: dt-bindings: Provide human readable define for Clocksource mode
  clocksource: sti: Provide support for the ST LPC Clocksource IP
  clocksource: sti: Provide 'use timer as sched clock' capability
  clocksource: bindings: Provide bindings for ST's LPC Clocksource
    device
  watchdog: st_wdt: Update IP layout information to include Clocksource
  watchdog: bindings: Supply knowledge of a third supported device -
    clocksource
  rtc: st: Update IP layout information to include Clocksource
  rtc: bindings: Supply knowledge of a third supported device -
    clocksource
  MAINTAINERS: Add the LPC Clocksource to STi maintained driver list
  ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource
  ARM: STi: Enable LPC Clocksource
  ARM: STi: Update platform level menuconfig 'help'

 .../devicetree/bindings/rtc/rtc-st-lpc.txt         |  15 ++-
 .../devicetree/bindings/timer/st,stih407-lpc       |  28 +++++
 .../devicetree/bindings/watchdog/st_lpc_wdt.txt    |  15 ++-
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/stih407-family.dtsi              |   2 +-
 arch/arm/mach-sti/Kconfig                          |   9 +-
 drivers/clocksource/Kconfig                        |  16 +++
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/clksrc_st_lpc.c                | 134 +++++++++++++++++++++
 drivers/rtc/rtc-st-lpc.c                           |   2 +-
 drivers/watchdog/st_lpc_wdt.c                      |   2 +-
 include/dt-bindings/mfd/st-lpc.h                   |   1 +
 12 files changed, 206 insertions(+), 20 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

-- 
1.9.1

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[PATCH 00/12] mfd: watchdog: rtc: Add LPC Clocksource driver

[Lee Jones]

ST's Low Power Controller (LPC) controls three devices; watchdog, RTC
and a Clocksource Timer.  Only one of the devices can be used at any
one time, which is enforced by the Device Driver model.

This patchset provides support for the Clocksource driver.  Watchdog
and RTC are already in -next.

Lee Jones (12):
  mfd: dt-bindings: Provide human readable define for Clocksource mode
  clocksource: sti: Provide support for the ST LPC Clocksource IP
  clocksource: sti: Provide 'use timer as sched clock' capability
  clocksource: bindings: Provide bindings for ST's LPC Clocksource
    device
  watchdog: st_wdt: Update IP layout information to include Clocksource
  watchdog: bindings: Supply knowledge of a third supported device -
    clocksource
  rtc: st: Update IP layout information to include Clocksource
  rtc: bindings: Supply knowledge of a third supported device -
    clocksource
  MAINTAINERS: Add the LPC Clocksource to STi maintained driver list
  ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource
  ARM: STi: Enable LPC Clocksource
  ARM: STi: Update platform level menuconfig 'help'

 .../devicetree/bindings/rtc/rtc-st-lpc.txt         |  15 ++-
 .../devicetree/bindings/timer/st,stih407-lpc       |  28 +++++
 .../devicetree/bindings/watchdog/st_lpc_wdt.txt    |  15 ++-
 MAINTAINERS                                        |   1 +
 arch/arm/boot/dts/stih407-family.dtsi              |   2 +-
 arch/arm/mach-sti/Kconfig                          |   9 +-
 drivers/clocksource/Kconfig                        |  16 +++
 drivers/clocksource/Makefile                       |   1 +
 drivers/clocksource/clksrc_st_lpc.c                | 134 +++++++++++++++++++++
 drivers/rtc/rtc-st-lpc.c                           |   2 +-
 drivers/watchdog/st_lpc_wdt.c                      |   2 +-
 include/dt-bindings/mfd/st-lpc.h                   |   1 +
 12 files changed, 206 insertions(+), 20 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

-- 
1.9.1

[PATCH 01/12] mfd: dt-bindings: Provide human readable define for Clocksource mode

[Lee Jones]

ST's Low Power Controller can now operate in three supported modes;
Watchdog, Real Time Clock and most recently as a Clocksource.  This new
define will allow the LPC IP to be configured for Clocksource from DT.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 include/dt-bindings/mfd/st-lpc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/mfd/st-lpc.h b/include/dt-bindings/mfd/st-lpc.h
index e3e6c75..d05894a 100644
--- a/include/dt-bindings/mfd/st-lpc.h
+++ b/include/dt-bindings/mfd/st-lpc.h
@@ -11,5 +11,6 @@
 
 #define ST_LPC_MODE_RTC		0
 #define ST_LPC_MODE_WDT		1
+#define ST_LPC_MODE_CLKSRC	2
 
 #endif /* __DT_BINDINGS_ST_LPC_H__ */
-- 
1.9.1

[rtc-linux] [PATCH 01/12] mfd: dt-bindings: Provide human readable define for Clocksource mode

[Lee Jones]

ST's Low Power Controller can now operate in three supported modes;
Watchdog, Real Time Clock and most recently as a Clocksource.  This new
define will allow the LPC IP to be configured for Clocksource from DT.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 include/dt-bindings/mfd/st-lpc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/mfd/st-lpc.h b/include/dt-bindings/mfd/st-lpc.h
index e3e6c75..d05894a 100644
--- a/include/dt-bindings/mfd/st-lpc.h
+++ b/include/dt-bindings/mfd/st-lpc.h
@@ -11,5 +11,6 @@
 
 #define ST_LPC_MODE_RTC		0
 #define ST_LPC_MODE_WDT		1
+#define ST_LPC_MODE_CLKSRC	2
 
 #endif /* __DT_BINDINGS_ST_LPC_H__ */
-- 
1.9.1

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[PATCH 01/12] mfd: dt-bindings: Provide human readable define for Clocksource mode

[Lee Jones]

ST's Low Power Controller can now operate in three supported modes;
Watchdog, Real Time Clock and most recently as a Clocksource.  This new
define will allow the LPC IP to be configured for Clocksource from DT.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 include/dt-bindings/mfd/st-lpc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/mfd/st-lpc.h b/include/dt-bindings/mfd/st-lpc.h
index e3e6c75..d05894a 100644
--- a/include/dt-bindings/mfd/st-lpc.h
+++ b/include/dt-bindings/mfd/st-lpc.h
@@ -11,5 +11,6 @@
 
 #define ST_LPC_MODE_RTC		0
 #define ST_LPC_MODE_WDT		1
+#define ST_LPC_MODE_CLKSRC	2
 
 #endif /* __DT_BINDINGS_ST_LPC_H__ */
-- 
1.9.1

[PATCH 01/12] mfd: dt-bindings: Provide human readable define for Clocksource mode

[Lee Jones]

ST's Low Power Controller can now operate in three supported modes;
Watchdog, Real Time Clock and most recently as a Clocksource.  This new
define will allow the LPC IP to be configured for Clocksource from DT.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 include/dt-bindings/mfd/st-lpc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/mfd/st-lpc.h b/include/dt-bindings/mfd/st-lpc.h
index e3e6c75..d05894a 100644
--- a/include/dt-bindings/mfd/st-lpc.h
+++ b/include/dt-bindings/mfd/st-lpc.h
@@ -11,5 +11,6 @@
 
 #define ST_LPC_MODE_RTC		0
 #define ST_LPC_MODE_WDT		1
+#define ST_LPC_MODE_CLKSRC	2
 
 #endif /* __DT_BINDINGS_ST_LPC_H__ */
-- 
1.9.1

[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

This IP is shared with Watchdog and RTC functionality.  Only one of
these IPs can be used at the same time.  We use the device-driver
model combined with a DT 'mode' property to enforce this.

The ST LPC Clocksource IP can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |   8 +++
 drivers/clocksource/Makefile        |   1 +
 drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 68161f7..ac424cf 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -250,4 +250,12 @@ config CLKSRC_PXA
 	help
 	  This enables OST0 support available on PXA and SA-11x0
 	  platforms.
+
+config CLKSRC_ST_LPC
+	bool
+	depends on ARCH_STI
+	select CLKSRC_OF if OF
+	help
+	  Enable this option to use the Low Power controller timer
+	  as clocksource.
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 752d5c7..e08da4d 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
 obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
 obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
 obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
new file mode 100644
index 0000000..18a7dcd0
--- /dev/null
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -0,0 +1,123 @@
+/*
+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
+ *
+ * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
+ *
+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/mfd/st-lpc.h>
+
+/* Low Power Timer */
+#define LPC_LPT_LSB_OFF		0x400
+#define LPC_LPT_MSB_OFF		0x404
+#define LPC_LPT_START_OFF	0x408
+
+static struct st_clksrc_ddata {
+	struct clk		*clk;
+	void __iomem		*base;
+} ddata;
+
+static void st_clksrc_reset(void)
+{
+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
+}
+
+static int __init st_clksrc_init(void)
+{
+	unsigned long rate;
+	int ret;
+
+	st_clksrc_reset();
+
+	rate = clk_get_rate(ddata.clk);
+
+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
+				    "clksrc-st-lpc", rate, 300, 32,
+				    clocksource_mmio_readl_up);
+	if (ret) {
+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int st_clksrc_setup_clk(struct device_node *np)
+{
+	struct clk *clk;
+	int ret;
+
+	clk = of_clk_get(np, 0);
+	if (IS_ERR(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
+		ret = PTR_ERR(clk);
+		return ret;
+	}
+
+	if (clk_prepare_enable(clk)) {
+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
+		return -EINVAL;
+	}
+
+	if (!clk_get_rate(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
+		clk_disable_unprepare(clk);
+		return -EINVAL;
+	}
+
+	ddata.clk = clk;
+
+	return 0;
+}
+
+static void __init st_clksrc_of_register(struct device_node *np)
+{
+	int ret;
+	uint32_t mode;
+
+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
+	if (ret) {
+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
+		return;
+	}
+
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
+	if (mode != ST_LPC_MODE_CLKSRC)
+		return;
+
+	ddata.base = of_iomap(np, 0);
+	if (!ddata.base) {
+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
+		return;
+	}
+
+	if (st_clksrc_setup_clk(np)) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	if (st_clksrc_init()) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
+		clk_get_rate(ddata.clk));
+}
+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
-- 
1.9.1

[rtc-linux] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

This IP is shared with Watchdog and RTC functionality.  Only one of
these IPs can be used at the same time.  We use the device-driver
model combined with a DT 'mode' property to enforce this.

The ST LPC Clocksource IP can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |   8 +++
 drivers/clocksource/Makefile        |   1 +
 drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++=
++++
 3 files changed, 132 insertions(+)
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 68161f7..ac424cf 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -250,4 +250,12 @@ config CLKSRC_PXA
 	help
 	  This enables OST0 support available on PXA and SA-11x0
 	  platforms.
+
+config CLKSRC_ST_LPC
+	bool
+	depends on ARCH_STI
+	select CLKSRC_OF if OF
+	help
+	  Enable this option to use the Low Power controller timer
+	  as clocksource.
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 752d5c7..e08da4d 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+=3D timer-integrator-ap=
.o
 obj-$(CONFIG_CLKSRC_VERSATILE)		+=3D versatile.o
 obj-$(CONFIG_CLKSRC_MIPS_GIC)		+=3D mips-gic-timer.o
 obj-$(CONFIG_ASM9260_TIMER)		+=3D asm9260_timer.o
+obj-$(CONFIG_CLKSRC_ST_LPC)		+=3D clksrc_st_lpc.o
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clks=
rc_st_lpc.c
new file mode 100644
index 0000000..18a7dcd0
--- /dev/null
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -0,0 +1,123 @@
+/*
+ * Clocksource using the Low Power Timer found in the Low Power Controller=
 (LPC)
+ *
+ * Copyright (C) 2015 STMicroelectronics =E2=80=93 All Rights Reserved
+ *
+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/mfd/st-lpc.h>
+
+/* Low Power Timer */
+#define LPC_LPT_LSB_OFF		0x400
+#define LPC_LPT_MSB_OFF		0x404
+#define LPC_LPT_START_OFF	0x408
+
+static struct st_clksrc_ddata {
+	struct clk		*clk;
+	void __iomem		*base;
+} ddata;
+
+static void st_clksrc_reset(void)
+{
+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
+}
+
+static int __init st_clksrc_init(void)
+{
+	unsigned long rate;
+	int ret;
+
+	st_clksrc_reset();
+
+	rate =3D clk_get_rate(ddata.clk);
+
+	ret =3D clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
+				    "clksrc-st-lpc", rate, 300, 32,
+				    clocksource_mmio_readl_up);
+	if (ret) {
+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int st_clksrc_setup_clk(struct device_node *np)
+{
+	struct clk *clk;
+	int ret;
+
+	clk =3D of_clk_get(np, 0);
+	if (IS_ERR(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
+		ret =3D PTR_ERR(clk);
+		return ret;
+	}
+
+	if (clk_prepare_enable(clk)) {
+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
+		return -EINVAL;
+	}
+
+	if (!clk_get_rate(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
+		clk_disable_unprepare(clk);
+		return -EINVAL;
+	}
+
+	ddata.clk =3D clk;
+
+	return 0;
+}
+
+static void __init st_clksrc_of_register(struct device_node *np)
+{
+	int ret;
+	uint32_t mode;
+
+	ret =3D of_property_read_u32(np, "st,lpc-mode", &mode);
+	if (ret) {
+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
+		return;
+	}
+
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
+	if (mode !=3D ST_LPC_MODE_CLKSRC)
+		return;
+
+	ddata.base =3D of_iomap(np, 0);
+	if (!ddata.base) {
+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
+		return;
+	}
+
+	if (st_clksrc_setup_clk(np)) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	if (st_clksrc_init()) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
+		clk_get_rate(ddata.clk));
+}
+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
--=20
1.9.1

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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

This IP is shared with Watchdog and RTC functionality.  Only one of
these IPs can be used at the same time.  We use the device-driver
model combined with a DT 'mode' property to enforce this.

The ST LPC Clocksource IP can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 drivers/clocksource/Kconfig         |   8 +++
 drivers/clocksource/Makefile        |   1 +
 drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 68161f7..ac424cf 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -250,4 +250,12 @@ config CLKSRC_PXA
 	help
 	  This enables OST0 support available on PXA and SA-11x0
 	  platforms.
+
+config CLKSRC_ST_LPC
+	bool
+	depends on ARCH_STI
+	select CLKSRC_OF if OF
+	help
+	  Enable this option to use the Low Power controller timer
+	  as clocksource.
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 752d5c7..e08da4d 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
 obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
 obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
 obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
new file mode 100644
index 0000000..18a7dcd0
--- /dev/null
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -0,0 +1,123 @@
+/*
+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
+ *
+ * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
+ *
+ * Author(s): Francesco Virlinzi <francesco.virlinzi-qxv4g6HH51o@public.gmane.org>
+ *	      Ajit Pal Singh <ajitpal.singh-qxv4g6HH51o@public.gmane.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/mfd/st-lpc.h>
+
+/* Low Power Timer */
+#define LPC_LPT_LSB_OFF		0x400
+#define LPC_LPT_MSB_OFF		0x404
+#define LPC_LPT_START_OFF	0x408
+
+static struct st_clksrc_ddata {
+	struct clk		*clk;
+	void __iomem		*base;
+} ddata;
+
+static void st_clksrc_reset(void)
+{
+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
+}
+
+static int __init st_clksrc_init(void)
+{
+	unsigned long rate;
+	int ret;
+
+	st_clksrc_reset();
+
+	rate = clk_get_rate(ddata.clk);
+
+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
+				    "clksrc-st-lpc", rate, 300, 32,
+				    clocksource_mmio_readl_up);
+	if (ret) {
+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int st_clksrc_setup_clk(struct device_node *np)
+{
+	struct clk *clk;
+	int ret;
+
+	clk = of_clk_get(np, 0);
+	if (IS_ERR(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
+		ret = PTR_ERR(clk);
+		return ret;
+	}
+
+	if (clk_prepare_enable(clk)) {
+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
+		return -EINVAL;
+	}
+
+	if (!clk_get_rate(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
+		clk_disable_unprepare(clk);
+		return -EINVAL;
+	}
+
+	ddata.clk = clk;
+
+	return 0;
+}
+
+static void __init st_clksrc_of_register(struct device_node *np)
+{
+	int ret;
+	uint32_t mode;
+
+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
+	if (ret) {
+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
+		return;
+	}
+
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
+	if (mode != ST_LPC_MODE_CLKSRC)
+		return;
+
+	ddata.base = of_iomap(np, 0);
+	if (!ddata.base) {
+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
+		return;
+	}
+
+	if (st_clksrc_setup_clk(np)) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	if (st_clksrc_init()) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
+		clk_get_rate(ddata.clk));
+}
+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
-- 
1.9.1

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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

This IP is shared with Watchdog and RTC functionality.  Only one of
these IPs can be used at the same time.  We use the device-driver
model combined with a DT 'mode' property to enforce this.

The ST LPC Clocksource IP can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |   8 +++
 drivers/clocksource/Makefile        |   1 +
 drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 68161f7..ac424cf 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -250,4 +250,12 @@ config CLKSRC_PXA
 	help
 	  This enables OST0 support available on PXA and SA-11x0
 	  platforms.
+
+config CLKSRC_ST_LPC
+	bool
+	depends on ARCH_STI
+	select CLKSRC_OF if OF
+	help
+	  Enable this option to use the Low Power controller timer
+	  as clocksource.
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 752d5c7..e08da4d 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
 obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
 obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
 obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
new file mode 100644
index 0000000..18a7dcd0
--- /dev/null
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -0,0 +1,123 @@
+/*
+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
+ *
+ * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
+ *
+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/mfd/st-lpc.h>
+
+/* Low Power Timer */
+#define LPC_LPT_LSB_OFF		0x400
+#define LPC_LPT_MSB_OFF		0x404
+#define LPC_LPT_START_OFF	0x408
+
+static struct st_clksrc_ddata {
+	struct clk		*clk;
+	void __iomem		*base;
+} ddata;
+
+static void st_clksrc_reset(void)
+{
+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
+}
+
+static int __init st_clksrc_init(void)
+{
+	unsigned long rate;
+	int ret;
+
+	st_clksrc_reset();
+
+	rate = clk_get_rate(ddata.clk);
+
+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
+				    "clksrc-st-lpc", rate, 300, 32,
+				    clocksource_mmio_readl_up);
+	if (ret) {
+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int st_clksrc_setup_clk(struct device_node *np)
+{
+	struct clk *clk;
+	int ret;
+
+	clk = of_clk_get(np, 0);
+	if (IS_ERR(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
+		ret = PTR_ERR(clk);
+		return ret;
+	}
+
+	if (clk_prepare_enable(clk)) {
+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
+		return -EINVAL;
+	}
+
+	if (!clk_get_rate(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
+		clk_disable_unprepare(clk);
+		return -EINVAL;
+	}
+
+	ddata.clk = clk;
+
+	return 0;
+}
+
+static void __init st_clksrc_of_register(struct device_node *np)
+{
+	int ret;
+	uint32_t mode;
+
+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
+	if (ret) {
+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
+		return;
+	}
+
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
+	if (mode != ST_LPC_MODE_CLKSRC)
+		return;
+
+	ddata.base = of_iomap(np, 0);
+	if (!ddata.base) {
+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
+		return;
+	}
+
+	if (st_clksrc_setup_clk(np)) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	if (st_clksrc_init()) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
+		clk_get_rate(ddata.clk));
+}
+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
-- 
1.9.1

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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

This IP is shared with Watchdog and RTC functionality.  Only one of
these IPs can be used at the same time.  We use the device-driver
model combined with a DT 'mode' property to enforce this.

The ST LPC Clocksource IP can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |   8 +++
 drivers/clocksource/Makefile        |   1 +
 drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 drivers/clocksource/clksrc_st_lpc.c

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index 68161f7..ac424cf 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -250,4 +250,12 @@ config CLKSRC_PXA
 	help
 	  This enables OST0 support available on PXA and SA-11x0
 	  platforms.
+
+config CLKSRC_ST_LPC
+	bool
+	depends on ARCH_STI
+	select CLKSRC_OF if OF
+	help
+	  Enable this option to use the Low Power controller timer
+	  as clocksource.
 endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index 752d5c7..e08da4d 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
 obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
 obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
 obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
new file mode 100644
index 0000000..18a7dcd0
--- /dev/null
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -0,0 +1,123 @@
+/*
+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
+ *
+ * Copyright (C) 2015 STMicroelectronics ? All Rights Reserved
+ *
+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/init.h>
+#include <linux/of_address.h>
+#include <linux/slab.h>
+
+#include <dt-bindings/mfd/st-lpc.h>
+
+/* Low Power Timer */
+#define LPC_LPT_LSB_OFF		0x400
+#define LPC_LPT_MSB_OFF		0x404
+#define LPC_LPT_START_OFF	0x408
+
+static struct st_clksrc_ddata {
+	struct clk		*clk;
+	void __iomem		*base;
+} ddata;
+
+static void st_clksrc_reset(void)
+{
+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
+}
+
+static int __init st_clksrc_init(void)
+{
+	unsigned long rate;
+	int ret;
+
+	st_clksrc_reset();
+
+	rate = clk_get_rate(ddata.clk);
+
+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
+				    "clksrc-st-lpc", rate, 300, 32,
+				    clocksource_mmio_readl_up);
+	if (ret) {
+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static int st_clksrc_setup_clk(struct device_node *np)
+{
+	struct clk *clk;
+	int ret;
+
+	clk = of_clk_get(np, 0);
+	if (IS_ERR(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
+		ret = PTR_ERR(clk);
+		return ret;
+	}
+
+	if (clk_prepare_enable(clk)) {
+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
+		return -EINVAL;
+	}
+
+	if (!clk_get_rate(clk)) {
+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
+		clk_disable_unprepare(clk);
+		return -EINVAL;
+	}
+
+	ddata.clk = clk;
+
+	return 0;
+}
+
+static void __init st_clksrc_of_register(struct device_node *np)
+{
+	int ret;
+	uint32_t mode;
+
+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
+	if (ret) {
+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
+		return;
+	}
+
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
+	if (mode != ST_LPC_MODE_CLKSRC)
+		return;
+
+	ddata.base = of_iomap(np, 0);
+	if (!ddata.base) {
+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
+		return;
+	}
+
+	if (st_clksrc_setup_clk(np)) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	if (st_clksrc_init()) {
+		iounmap(ddata.base);
+		return;
+	}
+
+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
+		clk_get_rate(ddata.clk));
+}
+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
-- 
1.9.1

[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |  8 ++++++++
 drivers/clocksource/clksrc_st_lpc.c | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index ac424cf..218daf8 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -258,4 +258,12 @@ config CLKSRC_ST_LPC
 	help
 	  Enable this option to use the Low Power controller timer
 	  as clocksource.
+
+config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+	bool
+	depends on CLKSRC_ST_LPC
+	default y
+	help
+	  Use Low Power controller timer clock source as sched_clock
+
 endmenu
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
index 18a7dcd0..3d92b26 100644
--- a/drivers/clocksource/clksrc_st_lpc.c
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -16,6 +16,7 @@
 #include <linux/clocksource.h>
 #include <linux/init.h>
 #include <linux/of_address.h>
+#include <linux/sched_clock.h>
 #include <linux/slab.h>
 
 #include <dt-bindings/mfd/st-lpc.h>
@@ -38,6 +39,13 @@ static void st_clksrc_reset(void)
 	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
 }
 
+#ifdef CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+static u64 notrace st_clksrc_sched_clock_read(void)
+{
+	return (u64)readl_relaxed(ddata.base + LPC_LPT_LSB_OFF);
+}
+#endif
+
 static int __init st_clksrc_init(void)
 {
 	unsigned long rate;
@@ -47,6 +55,9 @@ static int __init st_clksrc_init(void)
 
 	rate = clk_get_rate(ddata.clk);
 
+#ifdef CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+	sched_clock_register(st_clksrc_sched_clock_read, 32, rate);
+#endif
 	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
 				    "clksrc-st-lpc", rate, 300, 32,
 				    clocksource_mmio_readl_up);
-- 
1.9.1

[rtc-linux] [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |  8 ++++++++
 drivers/clocksource/clksrc_st_lpc.c | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index ac424cf..218daf8 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -258,4 +258,12 @@ config CLKSRC_ST_LPC
 	help
 	  Enable this option to use the Low Power controller timer
 	  as clocksource.
+
+config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+	bool
+	depends on CLKSRC_ST_LPC
+	default y
+	help
+	  Use Low Power controller timer clock source as sched_clock
+
 endmenu
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
index 18a7dcd0..3d92b26 100644
--- a/drivers/clocksource/clksrc_st_lpc.c
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -16,6 +16,7 @@
 #include <linux/clocksource.h>
 #include <linux/init.h>
 #include <linux/of_address.h>
+#include <linux/sched_clock.h>
 #include <linux/slab.h>
 
 #include <dt-bindings/mfd/st-lpc.h>
@@ -38,6 +39,13 @@ static void st_clksrc_reset(void)
 	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
 }
 
+#ifdef CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+static u64 notrace st_clksrc_sched_clock_read(void)
+{
+	return (u64)readl_relaxed(ddata.base + LPC_LPT_LSB_OFF);
+}
+#endif
+
 static int __init st_clksrc_init(void)
 {
 	unsigned long rate;
@@ -47,6 +55,9 @@ static int __init st_clksrc_init(void)
 
 	rate = clk_get_rate(ddata.clk);
 
+#ifdef CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+	sched_clock_register(st_clksrc_sched_clock_read, 32, rate);
+#endif
 	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
 				    "clksrc-st-lpc", rate, 300, 32,
 				    clocksource_mmio_readl_up);
-- 
1.9.1

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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/clocksource/Kconfig         |  8 ++++++++
 drivers/clocksource/clksrc_st_lpc.c | 11 +++++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index ac424cf..218daf8 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -258,4 +258,12 @@ config CLKSRC_ST_LPC
 	help
 	  Enable this option to use the Low Power controller timer
 	  as clocksource.
+
+config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+	bool
+	depends on CLKSRC_ST_LPC
+	default y
+	help
+	  Use Low Power controller timer clock source as sched_clock
+
 endmenu
diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
index 18a7dcd0..3d92b26 100644
--- a/drivers/clocksource/clksrc_st_lpc.c
+++ b/drivers/clocksource/clksrc_st_lpc.c
@@ -16,6 +16,7 @@
 #include <linux/clocksource.h>
 #include <linux/init.h>
 #include <linux/of_address.h>
+#include <linux/sched_clock.h>
 #include <linux/slab.h>
 
 #include <dt-bindings/mfd/st-lpc.h>
@@ -38,6 +39,13 @@ static void st_clksrc_reset(void)
 	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
 }
 
+#ifdef CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+static u64 notrace st_clksrc_sched_clock_read(void)
+{
+	return (u64)readl_relaxed(ddata.base + LPC_LPT_LSB_OFF);
+}
+#endif
+
 static int __init st_clksrc_init(void)
 {
 	unsigned long rate;
@@ -47,6 +55,9 @@ static int __init st_clksrc_init(void)
 
 	rate = clk_get_rate(ddata.clk);
 
+#ifdef CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
+	sched_clock_register(st_clksrc_sched_clock_read, 32, rate);
+#endif
 	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
 				    "clksrc-st-lpc", rate, 300, 32,
 				    clocksource_mmio_readl_up);
-- 
1.9.1

[PATCH 04/12] clocksource: bindings: Provide bindings for ST's LPC Clocksource device

[Lee Jones]

On current ST platforms the LPC controls a number of functions including
Watchdog and Real Time Clock.  This patch provides the bindings used to
configure LPC in Clocksource mode.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 .../devicetree/bindings/timer/st,stih407-lpc       | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc

diff --git a/Documentation/devicetree/bindings/timer/st,stih407-lpc b/Documentation/devicetree/bindings/timer/st,stih407-lpc
new file mode 100644
index 0000000..72acb48
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/st,stih407-lpc
@@ -0,0 +1,28 @@
+STMicroelectronics Low Power Controller (LPC) - Clocksource
+===========================================================
+
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
+
+[See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../rtc/rtc-st-lpc.txt for RTC options]
+
+Required properties
+
+- compatible   : Must be: "st,stih407-lpc"
+- reg          : LPC registers base address + size
+- interrupts   : LPC interrupt line number and associated flags
+- clocks       : Clock used by LPC device (See: ../clock/clock-bindings.txt)
+- st,lpc-mode  : The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
+
+Example:
+       lpc@fde05000 {
+               compatible      = "st,stih407-lpc";
+               reg             = <0xfde05000 0x1000>;
+               clocks          = <&clk_s_d3_flexgen CLK_LPC_0>;
+               st,lpc-mode     = <ST_LPC_MODE_CLKSRC>;
+       };
-- 
1.9.1

[rtc-linux] [PATCH 04/12] clocksource: bindings: Provide bindings for ST's LPC Clocksource device

[Lee Jones]

On current ST platforms the LPC controls a number of functions including
Watchdog and Real Time Clock.  This patch provides the bindings used to
configure LPC in Clocksource mode.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 .../devicetree/bindings/timer/st,stih407-lpc       | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc

diff --git a/Documentation/devicetree/bindings/timer/st,stih407-lpc b/Documentation/devicetree/bindings/timer/st,stih407-lpc
new file mode 100644
index 0000000..72acb48
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/st,stih407-lpc
@@ -0,0 +1,28 @@
+STMicroelectronics Low Power Controller (LPC) - Clocksource
+===========================================================
+
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
+
+[See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../rtc/rtc-st-lpc.txt for RTC options]
+
+Required properties
+
+- compatible   : Must be: "st,stih407-lpc"
+- reg          : LPC registers base address + size
+- interrupts   : LPC interrupt line number and associated flags
+- clocks       : Clock used by LPC device (See: ../clock/clock-bindings.txt)
+- st,lpc-mode  : The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
+
+Example:
+       lpc@fde05000 {
+               compatible      = "st,stih407-lpc";
+               reg             = <0xfde05000 0x1000>;
+               clocks          = <&clk_s_d3_flexgen CLK_LPC_0>;
+               st,lpc-mode     = <ST_LPC_MODE_CLKSRC>;
+       };
-- 
1.9.1

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[PATCH 04/12] clocksource: bindings: Provide bindings for ST's LPC Clocksource device

[Lee Jones]

On current ST platforms the LPC controls a number of functions including
Watchdog and Real Time Clock.  This patch provides the bindings used to
configure LPC in Clocksource mode.

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 .../devicetree/bindings/timer/st,stih407-lpc       | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc

diff --git a/Documentation/devicetree/bindings/timer/st,stih407-lpc b/Documentation/devicetree/bindings/timer/st,stih407-lpc
new file mode 100644
index 0000000..72acb48
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/st,stih407-lpc
@@ -0,0 +1,28 @@
+STMicroelectronics Low Power Controller (LPC) - Clocksource
+===========================================================
+
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
+
+[See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../rtc/rtc-st-lpc.txt for RTC options]
+
+Required properties
+
+- compatible   : Must be: "st,stih407-lpc"
+- reg          : LPC registers base address + size
+- interrupts   : LPC interrupt line number and associated flags
+- clocks       : Clock used by LPC device (See: ../clock/clock-bindings.txt)
+- st,lpc-mode  : The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
+
+Example:
+       lpc@fde05000 {
+               compatible      = "st,stih407-lpc";
+               reg             = <0xfde05000 0x1000>;
+               clocks          = <&clk_s_d3_flexgen CLK_LPC_0>;
+               st,lpc-mode     = <ST_LPC_MODE_CLKSRC>;
+       };
-- 
1.9.1

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[PATCH 04/12] clocksource: bindings: Provide bindings for ST's LPC Clocksource device

[Lee Jones]

On current ST platforms the LPC controls a number of functions including
Watchdog and Real Time Clock.  This patch provides the bindings used to
configure LPC in Clocksource mode.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 .../devicetree/bindings/timer/st,stih407-lpc       | 28 ++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/st,stih407-lpc

diff --git a/Documentation/devicetree/bindings/timer/st,stih407-lpc b/Documentation/devicetree/bindings/timer/st,stih407-lpc
new file mode 100644
index 0000000..72acb48
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/st,stih407-lpc
@@ -0,0 +1,28 @@
+STMicroelectronics Low Power Controller (LPC) - Clocksource
+===========================================================
+
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
+
+[See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../rtc/rtc-st-lpc.txt for RTC options]
+
+Required properties
+
+- compatible   : Must be: "st,stih407-lpc"
+- reg          : LPC registers base address + size
+- interrupts   : LPC interrupt line number and associated flags
+- clocks       : Clock used by LPC device (See: ../clock/clock-bindings.txt)
+- st,lpc-mode  : The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
+
+Example:
+       lpc at fde05000 {
+               compatible      = "st,stih407-lpc";
+               reg             = <0xfde05000 0x1000>;
+               clocks          = <&clk_s_d3_flexgen CLK_LPC_0>;
+               st,lpc-mode     = <ST_LPC_MODE_CLKSRC>;
+       };
-- 
1.9.1

[PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the Watchdog driver
to encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/watchdog/st_lpc_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
index f32be15..6785afd 100644
--- a/drivers/watchdog/st_lpc_wdt.c
+++ b/drivers/watchdog/st_lpc_wdt.c
@@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_WDT)
 		return -ENODEV;
 
-- 
1.9.1

[rtc-linux] [PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the Watchdog driver
to encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/watchdog/st_lpc_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
index f32be15..6785afd 100644
--- a/drivers/watchdog/st_lpc_wdt.c
+++ b/drivers/watchdog/st_lpc_wdt.c
@@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_WDT)
 		return -ENODEV;
 
-- 
1.9.1

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[PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the Watchdog driver
to encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 drivers/watchdog/st_lpc_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
index f32be15..6785afd 100644
--- a/drivers/watchdog/st_lpc_wdt.c
+++ b/drivers/watchdog/st_lpc_wdt.c
@@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_WDT)
 		return -ENODEV;
 
-- 
1.9.1

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[PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the Watchdog driver
to encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/watchdog/st_lpc_wdt.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
index f32be15..6785afd 100644
--- a/drivers/watchdog/st_lpc_wdt.c
+++ b/drivers/watchdog/st_lpc_wdt.c
@@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_WDT)
 		return -ENODEV;
 
-- 
1.9.1

[PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
index 388c88a..0b1a784 100644
--- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - Watchdog
 ========================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../rtc/rtc-st-lpc.txt for RTC options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be one of: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Required properties [watchdog mode]
 
-- 
1.9.1

[rtc-linux] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
index 388c88a..0b1a784 100644
--- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - Watchdog
 ========================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../rtc/rtc-st-lpc.txt for RTC options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be one of: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Required properties [watchdog mode]
 
-- 
1.9.1

-- 
-- 
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[PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
index 388c88a..0b1a784 100644
--- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - Watchdog
 ========================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../rtc/rtc-st-lpc.txt for RTC options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be one of: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Required properties [watchdog mode]
 
-- 
1.9.1

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[PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
index 388c88a..0b1a784 100644
--- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
+++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - Watchdog
 ========================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../rtc/rtc-st-lpc.txt for RTC options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be one of: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Required properties [watchdog mode]
 
-- 
1.9.1

[PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the RTC driver to
encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/rtc/rtc-st-lpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 3f9d0ac..74c0a33 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_RTC)
 		return -ENODEV;
 
-- 
1.9.1

[rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the RTC driver to
encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/rtc/rtc-st-lpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 3f9d0ac..74c0a33 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_RTC)
 		return -ENODEV;
 
-- 
1.9.1

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[PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the RTC driver to
encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 drivers/rtc/rtc-st-lpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 3f9d0ac..74c0a33 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_RTC)
 		return -ENODEV;
 
-- 
1.9.1

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[PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

Initial submission adding support for this IP only included Watchdog and
the Real-Time Clock.  Now the third (and final) device is enabled this
trivial patch is required to update the comment in the RTC driver to
encompass Clocksource.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/rtc/rtc-st-lpc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
index 3f9d0ac..74c0a33 100644
--- a/drivers/rtc/rtc-st-lpc.c
+++ b/drivers/rtc/rtc-st-lpc.c
@@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	/* LPC can either run in RTC or WDT mode */
+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
 	if (mode != ST_LPC_MODE_RTC)
 		return -ENODEV;
 
-- 
1.9.1

[PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
index 73407f50..daf8826 100644
--- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - RTC
 ===================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Example:
 	lpc@fde05000 {
-- 
1.9.1

[rtc-linux] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
index 73407f50..daf8826 100644
--- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - RTC
 ===================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Example:
 	lpc@fde05000 {
-- 
1.9.1

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[PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
index 73407f50..daf8826 100644
--- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
+++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
@@ -1,20 +1,23 @@
 STMicroelectronics Low Power Controller (LPC) - RTC
 ===================================================
 
-LPC currently supports Watchdog OR Real Time Clock functionality.
+LPC currently supports Watchdog OR Real Time Clock OR Clocksource
+functionality.
 
 [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
+[See: ../timer/st,stih407-lpc for Clocksource options]
 
 Required properties
 
-- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
-				  "st,stih415-lpc" "st,stid127-lpc"
+- compatible 	: Must be: "st,stih407-lpc"
 - reg		: LPC registers base address + size
 - interrupts    : LPC interrupt line number and associated flags
 - clocks	: Clock used by LPC device (See: ../clock/clock-bindings.txt)
-- st,lpc-mode	: The LPC can run either one of two modes ST_LPC_MODE_RTC [0] or
-		  ST_LPC_MODE_WDT [1].  One (and only one) mode must be
-		  selected.
+- st,lpc-mode	: The LPC can run either one of three modes:
+                  ST_LPC_MODE_RTC    [0]
+                  ST_LPC_MODE_WDT    [1]
+                  ST_LPC_MODE_CLKSRC [2]
+		 One (and only one) mode must be selected.
 
 Example:
 	lpc at fde05000 {
-- 
1.9.1

[PATCH 09/12] MAINTAINERS: Add the LPC Clocksource to STi maintained driver list

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 2bc71e7..af9e952 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1454,6 +1454,7 @@ S:	Maintained
 F:	arch/arm/mach-sti/
 F:	arch/arm/boot/dts/sti*
 F:	drivers/clocksource/arm_global_timer.c
+F:	drivers/clocksource/clksrc_st_lpc.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/mmc/host/sdhci-st.c
-- 
1.9.1

[rtc-linux] [PATCH 09/12] MAINTAINERS: Add the LPC Clocksource to STi maintained driver list

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 2bc71e7..af9e952 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1454,6 +1454,7 @@ S:	Maintained
 F:	arch/arm/mach-sti/
 F:	arch/arm/boot/dts/sti*
 F:	drivers/clocksource/arm_global_timer.c
+F:	drivers/clocksource/clksrc_st_lpc.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/mmc/host/sdhci-st.c
-- 
1.9.1

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[PATCH 09/12] MAINTAINERS: Add the LPC Clocksource to STi maintained driver list

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 2bc71e7..af9e952 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1454,6 +1454,7 @@ S:	Maintained
 F:	arch/arm/mach-sti/
 F:	arch/arm/boot/dts/sti*
 F:	drivers/clocksource/arm_global_timer.c
+F:	drivers/clocksource/clksrc_st_lpc.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/mmc/host/sdhci-st.c
-- 
1.9.1

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[PATCH 09/12] MAINTAINERS: Add the LPC Clocksource to STi maintained driver list

[Lee Jones]

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 MAINTAINERS | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 2bc71e7..af9e952 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1454,6 +1454,7 @@ S:	Maintained
 F:	arch/arm/mach-sti/
 F:	arch/arm/boot/dts/sti*
 F:	drivers/clocksource/arm_global_timer.c
+F:	drivers/clocksource/clksrc_st_lpc.c
 F:	drivers/i2c/busses/i2c-st.c
 F:	drivers/media/rc/st_rc.c
 F:	drivers/mmc/host/sdhci-st.c
-- 
1.9.1

[PATCH 10/12] ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource

[Lee Jones]

This aligns with the internal configuration.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 2b2315d..bf1c7f5 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -354,7 +354,7 @@
 			reg = <0x8788000 0x1000>;
 			interrupts = <GIC_SPI 130 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&clk_s_d3_flexgen CLK_LPC_1>;
-			st,lpc-mode = <ST_LPC_MODE_RTC>;
+			st,lpc-mode = <ST_LPC_MODE_CLKSRC>;
 		};
 	};
 };
-- 
1.9.1

[rtc-linux] [PATCH 10/12] ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource

[Lee Jones]

This aligns with the internal configuration.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 2b2315d..bf1c7f5 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -354,7 +354,7 @@
 			reg = <0x8788000 0x1000>;
 			interrupts = <GIC_SPI 130 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&clk_s_d3_flexgen CLK_LPC_1>;
-			st,lpc-mode = <ST_LPC_MODE_RTC>;
+			st,lpc-mode = <ST_LPC_MODE_CLKSRC>;
 		};
 	};
 };
-- 
1.9.1

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[PATCH 10/12] ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource

[Lee Jones]

This aligns with the internal configuration.

Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 2b2315d..bf1c7f5 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -354,7 +354,7 @@
 			reg = <0x8788000 0x1000>;
 			interrupts = <GIC_SPI 130 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&clk_s_d3_flexgen CLK_LPC_1>;
-			st,lpc-mode = <ST_LPC_MODE_RTC>;
+			st,lpc-mode = <ST_LPC_MODE_CLKSRC>;
 		};
 	};
 };
-- 
1.9.1

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[PATCH 10/12] ARM: STi: DT: STih407: Switch LPC mode from RTC to Clocksource

[Lee Jones]

This aligns with the internal configuration.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/boot/dts/stih407-family.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index 2b2315d..bf1c7f5 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -354,7 +354,7 @@
 			reg = <0x8788000 0x1000>;
 			interrupts = <GIC_SPI 130 IRQ_TYPE_EDGE_RISING>;
 			clocks = <&clk_s_d3_flexgen CLK_LPC_1>;
-			st,lpc-mode = <ST_LPC_MODE_RTC>;
+			st,lpc-mode = <ST_LPC_MODE_CLKSRC>;
 		};
 	};
 };
-- 
1.9.1

[PATCH 11/12] ARM: STi: Enable LPC Clocksource

[Lee Jones]

This timer can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-sti/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
index 3b1ac46..cb886de 100644
--- a/arch/arm/mach-sti/Kconfig
+++ b/arch/arm/mach-sti/Kconfig
@@ -2,6 +2,7 @@ menuconfig ARCH_STI
 	bool "STMicroelectronics Consumer Electronics SOCs" if ARCH_MULTI_V7
 	select ARM_GIC
 	select ARM_GLOBAL_TIMER
+	select CLKSRC_ST_LPC
 	select PINCTRL
 	select PINCTRL_ST
 	select MFD_SYSCON
-- 
1.9.1

[rtc-linux] [PATCH 11/12] ARM: STi: Enable LPC Clocksource

[Lee Jones]

This timer can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-sti/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
index 3b1ac46..cb886de 100644
--- a/arch/arm/mach-sti/Kconfig
+++ b/arch/arm/mach-sti/Kconfig
@@ -2,6 +2,7 @@ menuconfig ARCH_STI
 	bool "STMicroelectronics Consumer Electronics SOCs" if ARCH_MULTI_V7
 	select ARM_GIC
 	select ARM_GLOBAL_TIMER
+	select CLKSRC_ST_LPC
 	select PINCTRL
 	select PINCTRL_ST
 	select MFD_SYSCON
-- 
1.9.1

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[PATCH 11/12] ARM: STi: Enable LPC Clocksource

[Lee Jones]

This timer can be used as the system (tick) timer.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-sti/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
index 3b1ac46..cb886de 100644
--- a/arch/arm/mach-sti/Kconfig
+++ b/arch/arm/mach-sti/Kconfig
@@ -2,6 +2,7 @@ menuconfig ARCH_STI
 	bool "STMicroelectronics Consumer Electronics SOCs" if ARCH_MULTI_V7
 	select ARM_GIC
 	select ARM_GLOBAL_TIMER
+	select CLKSRC_ST_LPC
 	select PINCTRL
 	select PINCTRL_ST
 	select MFD_SYSCON
-- 
1.9.1

[PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

Encompass newer STiH4{07,10} SoC based platforms.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-sti/Kconfig | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
index cb886de..59928d9 100644
--- a/arch/arm/mach-sti/Kconfig
+++ b/arch/arm/mach-sti/Kconfig
@@ -16,11 +16,9 @@ menuconfig ARCH_STI
 	select PL310_ERRATA_769419 if CACHE_L2X0
 	select RESET_CONTROLLER
 	help
-	  Include support for STiH41x SOCs like STiH415/416 using the device tree
-	  for discovery
-	  More information at Documentation/arm/STiH41x and
-	  at Documentation/devicetree
-
+	  Include support for STMicroelectronics' STiH415/416 and stih407/10
+	  family SoCs using the Device Tree for discovery.  More information
+	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
 
 if ARCH_STI
 
-- 
1.9.1

[rtc-linux] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

Encompass newer STiH4{07,10} SoC based platforms.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-sti/Kconfig | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
index cb886de..59928d9 100644
--- a/arch/arm/mach-sti/Kconfig
+++ b/arch/arm/mach-sti/Kconfig
@@ -16,11 +16,9 @@ menuconfig ARCH_STI
 	select PL310_ERRATA_769419 if CACHE_L2X0
 	select RESET_CONTROLLER
 	help
-	  Include support for STiH41x SOCs like STiH415/416 using the device tree
-	  for discovery
-	  More information at Documentation/arm/STiH41x and
-	  at Documentation/devicetree
-
+	  Include support for STMicroelectronics' STiH415/416 and stih407/10
+	  family SoCs using the Device Tree for discovery.  More information
+	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
 
 if ARCH_STI
 
-- 
1.9.1

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[PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

Encompass newer STiH4{07,10} SoC based platforms.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 arch/arm/mach-sti/Kconfig | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
index cb886de..59928d9 100644
--- a/arch/arm/mach-sti/Kconfig
+++ b/arch/arm/mach-sti/Kconfig
@@ -16,11 +16,9 @@ menuconfig ARCH_STI
 	select PL310_ERRATA_769419 if CACHE_L2X0
 	select RESET_CONTROLLER
 	help
-	  Include support for STiH41x SOCs like STiH415/416 using the device tree
-	  for discovery
-	  More information at Documentation/arm/STiH41x and
-	  at Documentation/devicetree
-
+	  Include support for STMicroelectronics' STiH415/416 and stih407/10
+	  family SoCs using the Device Tree for discovery.  More information
+	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
 
 if ARCH_STI
 
-- 
1.9.1

Re: [STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> index 73407f50..daf8826 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - RTC
>  ===================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be: "st,stih407-lpc"

You are removing the compatibles documentation for the other supported SoC's like
stih416-lpc stih415-lpc here.

regards,

Peter.

[rtc-linux] Re: [STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> index 73407f50..daf8826 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - RTC
>  ===================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be: "st,stih407-lpc"

You are removing the compatibles documentation for the other supported SoC's like
stih416-lpc stih415-lpc here.

regards,

Peter.

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[STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> index 73407f50..daf8826 100644
> --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - RTC
>  ===================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be: "st,stih407-lpc"

You are removing the compatibles documentation for the other supported SoC's like
stih416-lpc stih415-lpc here.

regards,

Peter.

Re: [STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Encompass newer STiH4{07,10} SoC based platforms.
> 
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  arch/arm/mach-sti/Kconfig | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> index cb886de..59928d9 100644
> --- a/arch/arm/mach-sti/Kconfig
> +++ b/arch/arm/mach-sti/Kconfig
> @@ -16,11 +16,9 @@ menuconfig ARCH_STI
>  	select PL310_ERRATA_769419 if CACHE_L2X0
>  	select RESET_CONTROLLER
>  	help
> -	  Include support for STiH41x SOCs like STiH415/416 using the device tree
> -	  for discovery
> -	  More information at Documentation/arm/STiH41x and
> -	  at Documentation/devicetree
> -
> +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> +	  family SoCs using the Device Tree for discovery.  More information
> +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.

You should use the same capitalisation throughout. Also you can mention STiH418,
as that is now supported upstream.

Once fixed you can add my: -
     Acked-by: Peter Griffin <peter.griffin@linaro.org>

regards,

Peter.

[rtc-linux] Re: [STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Encompass newer STiH4{07,10} SoC based platforms.
> 
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  arch/arm/mach-sti/Kconfig | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> index cb886de..59928d9 100644
> --- a/arch/arm/mach-sti/Kconfig
> +++ b/arch/arm/mach-sti/Kconfig
> @@ -16,11 +16,9 @@ menuconfig ARCH_STI
>  	select PL310_ERRATA_769419 if CACHE_L2X0
>  	select RESET_CONTROLLER
>  	help
> -	  Include support for STiH41x SOCs like STiH415/416 using the device tree
> -	  for discovery
> -	  More information at Documentation/arm/STiH41x and
> -	  at Documentation/devicetree
> -
> +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> +	  family SoCs using the Device Tree for discovery.  More information
> +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.

You should use the same capitalisation throughout. Also you can mention STiH418,
as that is now supported upstream.

Once fixed you can add my: -
     Acked-by: Peter Griffin <peter.griffin@linaro.org>

regards,

Peter.

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[STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Encompass newer STiH4{07,10} SoC based platforms.
> 
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  arch/arm/mach-sti/Kconfig | 8 +++-----
>  1 file changed, 3 insertions(+), 5 deletions(-)
> 
> diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> index cb886de..59928d9 100644
> --- a/arch/arm/mach-sti/Kconfig
> +++ b/arch/arm/mach-sti/Kconfig
> @@ -16,11 +16,9 @@ menuconfig ARCH_STI
>  	select PL310_ERRATA_769419 if CACHE_L2X0
>  	select RESET_CONTROLLER
>  	help
> -	  Include support for STiH41x SOCs like STiH415/416 using the device tree
> -	  for discovery
> -	  More information at Documentation/arm/STiH41x and
> -	  at Documentation/devicetree
> -
> +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> +	  family SoCs using the Device Tree for discovery.  More information
> +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.

You should use the same capitalisation throughout. Also you can mention STiH418,
as that is now supported upstream.

Once fixed you can add my: -
     Acked-by: Peter Griffin <peter.griffin@linaro.org>

regards,

Peter.

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> index 388c88a..0b1a784 100644
> --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - Watchdog
>  ========================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be one of: "st,stih407-lpc"

The same comment as the RTC DT patch, you are removing the compatibles
documentation for the other supported platforms like stih416-lpc.
AFAIK they are required in the driver to get the correct sysconfig register.

regards,

Peter.

[rtc-linux] Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> index 388c88a..0b1a784 100644
> --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - Watchdog
>  ========================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be one of: "st,stih407-lpc"

The same comment as the RTC DT patch, you are removing the compatibles
documentation for the other supported platforms like stih416-lpc.
AFAIK they are required in the driver to get the correct sysconfig register.

regards,

Peter.

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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> ---
>  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> index 388c88a..0b1a784 100644
> --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - Watchdog
>  ========================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be one of: "st,stih407-lpc"

The same comment as the RTC DT patch, you are removing the compatibles
documentation for the other supported platforms like stih416-lpc.
AFAIK they are required in the driver to get the correct sysconfig register.

regards,

Peter.
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[STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
>  1 file changed, 9 insertions(+), 6 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> index 388c88a..0b1a784 100644
> --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> @@ -1,20 +1,23 @@
>  STMicroelectronics Low Power Controller (LPC) - Watchdog
>  ========================================================
>  
> -LPC currently supports Watchdog OR Real Time Clock functionality.
> +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> +functionality.
>  
>  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> +[See: ../timer/st,stih407-lpc for Clocksource options]
>  
>  Required properties
>  
> -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> -				  "st,stih415-lpc" "st,stid127-lpc"
> +- compatible 	: Must be one of: "st,stih407-lpc"

The same comment as the RTC DT patch, you are removing the compatibles
documentation for the other supported platforms like stih416-lpc.
AFAIK they are required in the driver to get the correct sysconfig register.

regards,

Peter.

Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.

Which means my previous assertion in V1 that the IP didn't exist on stih415/6
SoC is most likely wrong, as the watchdog driver has bindings already for those
platforms.

I did try this before and couldn't get it working (driver failed on clk_get_rate)
on stih416-b2020.

Did you try and see if you can get this also working for stih415/6 SoCs? It would
mean we can move away from arm_global_timer for all upstreamed STI platforms.

regards,

Peter.

[rtc-linux] Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.

Which means my previous assertion in V1 that the IP didn't exist on stih415/6
SoC is most likely wrong, as the watchdog driver has bindings already for those
platforms.

I did try this before and couldn't get it working (driver failed on clk_get_rate)
on stih416-b2020.

Did you try and see if you can get this also working for stih415/6 SoCs? It would
mean we can move away from arm_global_timer for all upstreamed STI platforms.

regards,

Peter.

-- 
-- 
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Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.

Which means my previous assertion in V1 that the IP didn't exist on stih415/6
SoC is most likely wrong, as the watchdog driver has bindings already for those
platforms.

I did try this before and couldn't get it working (driver failed on clk_get_rate)
on stih416-b2020.

Did you try and see if you can get this also working for stih415/6 SoCs? It would
mean we can move away from arm_global_timer for all upstreamed STI platforms.

regards,

Peter.
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[STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.

Which means my previous assertion in V1 that the IP didn't exist on stih415/6
SoC is most likely wrong, as the watchdog driver has bindings already for those
platforms.

I did try this before and couldn't get it working (driver failed on clk_get_rate)
on stih416-b2020.

Did you try and see if you can get this also working for stih415/6 SoCs? It would
mean we can move away from arm_global_timer for all upstreamed STI platforms.

regards,

Peter.

Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

> > This IP is shared with Watchdog and RTC functionality.  Only one of
> > these IPs can be used at the same time.  We use the device-driver
> > model combined with a DT 'mode' property to enforce this.
> 
> Which means my previous assertion in V1 that the IP didn't exist on stih415/6
> SoC is most likely wrong, as the watchdog driver has bindings already for those
> platforms.
> 
> I did try this before and couldn't get it working (driver failed on clk_get_rate)
> on stih416-b2020.
> 
> Did you try and see if you can get this also working for stih415/6 SoCs? It would
> mean we can move away from arm_global_timer for all upstreamed STI platforms.

This patch-set only supports STiH4{07,10}, which is the only platform
it's been tested on until this point.  I can investigate porting it to
Orly/Orly2 as a subsequent piece of work if it's going to be useful
for ST.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

> > This IP is shared with Watchdog and RTC functionality.  Only one of
> > these IPs can be used at the same time.  We use the device-driver
> > model combined with a DT 'mode' property to enforce this.
>=20
> Which means my previous assertion in V1 that the IP didn't exist on stih4=
15/6
> SoC is most likely wrong, as the watchdog driver has bindings already for=
 those
> platforms.
>=20
> I did try this before and couldn't get it working (driver failed on clk_g=
et_rate)
> on stih416-b2020.
>=20
> Did you try and see if you can get this also working for stih415/6 SoCs? =
It would
> mean we can move away from arm_global_timer for all upstreamed STI platfo=
rms.

This patch-set only supports STiH4{07,10}, which is the only platform
it's been tested on until this point.  I can investigate porting it to
Orly/Orly2 as a subsequent piece of work if it's going to be useful
for ST.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
--=20
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Please read http://groups.google.com/group/rtc-linux/web/checklist
before submitting a driver.
---=20
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rtc-linux" group.
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For more options, visit https://groups.google.com/d/optout.

Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

> > This IP is shared with Watchdog and RTC functionality.  Only one of
> > these IPs can be used at the same time.  We use the device-driver
> > model combined with a DT 'mode' property to enforce this.
> 
> Which means my previous assertion in V1 that the IP didn't exist on stih415/6
> SoC is most likely wrong, as the watchdog driver has bindings already for those
> platforms.
> 
> I did try this before and couldn't get it working (driver failed on clk_get_rate)
> on stih416-b2020.
> 
> Did you try and see if you can get this also working for stih415/6 SoCs? It would
> mean we can move away from arm_global_timer for all upstreamed STI platforms.

This patch-set only supports STiH4{07,10}, which is the only platform
it's been tested on until this point.  I can investigate porting it to
Orly/Orly2 as a subsequent piece of work if it's going to be useful
for ST.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

> > This IP is shared with Watchdog and RTC functionality.  Only one of
> > these IPs can be used at the same time.  We use the device-driver
> > model combined with a DT 'mode' property to enforce this.
> 
> Which means my previous assertion in V1 that the IP didn't exist on stih415/6
> SoC is most likely wrong, as the watchdog driver has bindings already for those
> platforms.
> 
> I did try this before and couldn't get it working (driver failed on clk_get_rate)
> on stih416-b2020.
> 
> Did you try and see if you can get this also working for stih415/6 SoCs? It would
> mean we can move away from arm_global_timer for all upstreamed STI platforms.

This patch-set only supports STiH4{07,10}, which is the only platform
it's been tested on until this point.  I can investigate porting it to
Orly/Orly2 as a subsequent piece of work if it's going to be useful
for ST.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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[STLinux Kernel] [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

> > This IP is shared with Watchdog and RTC functionality.  Only one of
> > these IPs can be used at the same time.  We use the device-driver
> > model combined with a DT 'mode' property to enforce this.
> 
> Which means my previous assertion in V1 that the IP didn't exist on stih415/6
> SoC is most likely wrong, as the watchdog driver has bindings already for those
> platforms.
> 
> I did try this before and couldn't get it working (driver failed on clk_get_rate)
> on stih416-b2020.
> 
> Did you try and see if you can get this also working for stih415/6 SoCs? It would
> mean we can move away from arm_global_timer for all upstreamed STI platforms.

This patch-set only supports STiH4{07,10}, which is the only platform
it's been tested on until this point.  I can investigate porting it to
Orly/Orly2 as a subsequent piece of work if it's going to be useful
for ST.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > index 388c88a..0b1a784 100644
> > --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - Watchdog
> >  ========================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be one of: "st,stih407-lpc"
> 
> The same comment as the RTC DT patch, you are removing the compatibles
> documentation for the other supported platforms like stih416-lpc.
> AFAIK they are required in the driver to get the correct sysconfig register.

That's intentional.  I haven't yet tested any of this IP on
STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
sure if this IP even exists on some of the other platforms.  I will
add them back when support is added to both driver and DTB and I've
been able to test them.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++=
++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> >=20
> > diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt =
b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > index 388c88a..0b1a784 100644
> > --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - Watchdog
> >  =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D
> > =20
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> > =20
> >  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> > =20
> >  Required properties
> > =20
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be one of: "st,stih407-lpc"
>=20
> The same comment as the RTC DT patch, you are removing the compatibles
> documentation for the other supported platforms like stih416-lpc.
> AFAIK they are required in the driver to get the correct sysconfig regist=
er.

That's intentional.  I haven't yet tested any of this IP on
STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
sure if this IP even exists on some of the other platforms.  I will
add them back when support is added to both driver and DTB and I've
been able to test them.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
--=20
You received this message because you are subscribed to "rtc-linux".
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---=20
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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> > ---
> >  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > index 388c88a..0b1a784 100644
> > --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - Watchdog
> >  ========================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be one of: "st,stih407-lpc"
> 
> The same comment as the RTC DT patch, you are removing the compatibles
> documentation for the other supported platforms like stih416-lpc.
> AFAIK they are required in the driver to get the correct sysconfig register.

That's intentional.  I haven't yet tested any of this IP on
STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
sure if this IP even exists on some of the other platforms.  I will
add them back when support is added to both driver and DTB and I've
been able to test them.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > index 388c88a..0b1a784 100644
> > --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - Watchdog
> >  ========================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be one of: "st,stih407-lpc"
> 
> The same comment as the RTC DT patch, you are removing the compatibles
> documentation for the other supported platforms like stih416-lpc.
> AFAIK they are required in the driver to get the correct sysconfig register.

That's intentional.  I haven't yet tested any of this IP on
STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
sure if this IP even exists on some of the other platforms.  I will
add them back when support is added to both driver and DTB and I've
been able to test them.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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[STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > index 388c88a..0b1a784 100644
> > --- a/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > +++ b/Documentation/devicetree/bindings/watchdog/st_lpc_wdt.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - Watchdog
> >  ========================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../rtc/rtc-st-lpc.txt for RTC options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be one of: "st,stih407-lpc"
> 
> The same comment as the RTC DT patch, you are removing the compatibles
> documentation for the other supported platforms like stih416-lpc.
> AFAIK they are required in the driver to get the correct sysconfig register.

That's intentional.  I haven't yet tested any of this IP on
STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
sure if this IP even exists on some of the other platforms.  I will
add them back when support is added to both driver and DTB and I've
been able to test them.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> > Encompass newer STiH4{07,10} SoC based platforms.
> > 
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  arch/arm/mach-sti/Kconfig | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> > 
> > diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> > index cb886de..59928d9 100644
> > --- a/arch/arm/mach-sti/Kconfig
> > +++ b/arch/arm/mach-sti/Kconfig
> > @@ -16,11 +16,9 @@ menuconfig ARCH_STI
> >  	select PL310_ERRATA_769419 if CACHE_L2X0
> >  	select RESET_CONTROLLER
> >  	help
> > -	  Include support for STiH41x SOCs like STiH415/416 using the device tree
> > -	  for discovery
> > -	  More information at Documentation/arm/STiH41x and
> > -	  at Documentation/devicetree
> > -
> > +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> > +	  family SoCs using the Device Tree for discovery.  More information
> > +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
> 
> You should use the same capitalisation throughout.

Good spot, that was unintentional.  Will fix.

> Also you can mention STiH418, as that is now supported upstream.

Yep, thanks.

> Once fixed you can add my: -
>      Acked-by: Peter Griffin <peter.griffin@linaro.org>

Ta.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
>=20
> On Thu, 07 May 2015, Lee Jones wrote:
>=20
> > Encompass newer STiH4{07,10} SoC based platforms.
> >=20
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  arch/arm/mach-sti/Kconfig | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> >=20
> > diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> > index cb886de..59928d9 100644
> > --- a/arch/arm/mach-sti/Kconfig
> > +++ b/arch/arm/mach-sti/Kconfig
> > @@ -16,11 +16,9 @@ menuconfig ARCH_STI
> >  	select PL310_ERRATA_769419 if CACHE_L2X0
> >  	select RESET_CONTROLLER
> >  	help
> > -	  Include support for STiH41x SOCs like STiH415/416 using the device =
tree
> > -	  for discovery
> > -	  More information at Documentation/arm/STiH41x and
> > -	  at Documentation/devicetree
> > -
> > +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> > +	  family SoCs using the Device Tree for discovery.  More information
> > +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
>=20
> You should use the same capitalisation throughout.

Good spot, that was unintentional.  Will fix.

> Also you can mention STiH418, as that is now supported upstream.

Yep, thanks.

> Once fixed you can add my: -
>      Acked-by: Peter Griffin <peter.griffin@linaro.org>

Ta.

--=20
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Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

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Re: [STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> > Encompass newer STiH4{07,10} SoC based platforms.
> > 
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  arch/arm/mach-sti/Kconfig | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> > 
> > diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> > index cb886de..59928d9 100644
> > --- a/arch/arm/mach-sti/Kconfig
> > +++ b/arch/arm/mach-sti/Kconfig
> > @@ -16,11 +16,9 @@ menuconfig ARCH_STI
> >  	select PL310_ERRATA_769419 if CACHE_L2X0
> >  	select RESET_CONTROLLER
> >  	help
> > -	  Include support for STiH41x SOCs like STiH415/416 using the device tree
> > -	  for discovery
> > -	  More information at Documentation/arm/STiH41x and
> > -	  at Documentation/devicetree
> > -
> > +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> > +	  family SoCs using the Device Tree for discovery.  More information
> > +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
> 
> You should use the same capitalisation throughout.

Good spot, that was unintentional.  Will fix.

> Also you can mention STiH418, as that is now supported upstream.

Yep, thanks.

> Once fixed you can add my: -
>      Acked-by: Peter Griffin <peter.griffin@linaro.org>

Ta.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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[STLinux Kernel] [PATCH 12/12] ARM: STi: Update platform level menuconfig 'help'

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> > Encompass newer STiH4{07,10} SoC based platforms.
> > 
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  arch/arm/mach-sti/Kconfig | 8 +++-----
> >  1 file changed, 3 insertions(+), 5 deletions(-)
> > 
> > diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig
> > index cb886de..59928d9 100644
> > --- a/arch/arm/mach-sti/Kconfig
> > +++ b/arch/arm/mach-sti/Kconfig
> > @@ -16,11 +16,9 @@ menuconfig ARCH_STI
> >  	select PL310_ERRATA_769419 if CACHE_L2X0
> >  	select RESET_CONTROLLER
> >  	help
> > -	  Include support for STiH41x SOCs like STiH415/416 using the device tree
> > -	  for discovery
> > -	  More information at Documentation/arm/STiH41x and
> > -	  at Documentation/devicetree
> > -
> > +	  Include support for STMicroelectronics' STiH415/416 and stih407/10
> > +	  family SoCs using the Device Tree for discovery.  More information
> > +	  can be found in Documentation/arm/sti/ & Documentation/devicetree.
> 
> You should use the same capitalisation throughout.

Good spot, that was unintentional.  Will fix.

> Also you can mention STiH418, as that is now supported upstream.

Yep, thanks.

> Once fixed you can add my: -
>      Acked-by: Peter Griffin <peter.griffin@linaro.org>

Ta.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > index 73407f50..daf8826 100644
> > --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - RTC
> >  ===================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be: "st,stih407-lpc"
> 
> You are removing the compatibles documentation for the other supported SoC's like
> stih416-lpc stih415-lpc here.

It would be pretty difficult to do that by mistake. :)

See the comment I made to the Watchdog bindings patch for more info.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++---=
---
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> >=20
> > diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Doc=
umentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > index 73407f50..daf8826 100644
> > --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - RTC
> >  =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D
> > =20
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> > =20
> >  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> > =20
> >  Required properties
> > =20
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be: "st,stih407-lpc"
>=20
> You are removing the compatibles documentation for the other supported So=
C's like
> stih416-lpc stih415-lpc here.

It would be pretty difficult to do that by mistake. :)

See the comment I made to the Watchdog bindings patch for more info.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
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Re: [STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> > ---
> >  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > index 73407f50..daf8826 100644
> > --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - RTC
> >  ===================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be: "st,stih407-lpc"
> 
> You are removing the compatibles documentation for the other supported SoC's like
> stih416-lpc stih415-lpc here.

It would be pretty difficult to do that by mistake. :)

See the comment I made to the Watchdog bindings patch for more info.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > index 73407f50..daf8826 100644
> > --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - RTC
> >  ===================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be: "st,stih407-lpc"
> 
> You are removing the compatibles documentation for the other supported SoC's like
> stih416-lpc stih415-lpc here.

It would be pretty difficult to do that by mistake. :)

See the comment I made to the Watchdog bindings patch for more info.

-- 
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Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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[STLinux Kernel] [PATCH 08/12] rtc: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> > ---
> >  Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt | 15 +++++++++------
> >  1 file changed, 9 insertions(+), 6 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > index 73407f50..daf8826 100644
> > --- a/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > +++ b/Documentation/devicetree/bindings/rtc/rtc-st-lpc.txt
> > @@ -1,20 +1,23 @@
> >  STMicroelectronics Low Power Controller (LPC) - RTC
> >  ===================================================
> >  
> > -LPC currently supports Watchdog OR Real Time Clock functionality.
> > +LPC currently supports Watchdog OR Real Time Clock OR Clocksource
> > +functionality.
> >  
> >  [See: ../watchdog/st_lpc_wdt.txt for Watchdog options]
> > +[See: ../timer/st,stih407-lpc for Clocksource options]
> >  
> >  Required properties
> >  
> > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > -				  "st,stih415-lpc" "st,stid127-lpc"
> > +- compatible 	: Must be: "st,stih407-lpc"
> 
> You are removing the compatibles documentation for the other supported SoC's like
> stih416-lpc stih415-lpc here.

It would be pretty difficult to do that by mistake. :)

See the comment I made to the Watchdog bindings patch for more info.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

<snip>

> > >  Required properties
> > >  
> > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > 
> > The same comment as the RTC DT patch, you are removing the compatibles
> > documentation for the other supported platforms like stih416-lpc.
> > AFAIK they are required in the driver to get the correct sysconfig register.
> 
> That's intentional.  I haven't yet tested any of this IP on
> STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> sure if this IP even exists on some of the other platforms.  I will
> add them back when support is added to both driver and DTB and I've
> been able to test them.

That was kind of my point, the driver code AFAIK already contains support
for these SoC's.

I would either expect the patch to remove support from the DT docs AND the
driver, or leave it as is.

It seems odd to only change the DT docs, and become unaligned to the
code (this assumes I'm looking at the latest patchset here 
https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

regards,

Peter.

[rtc-linux] Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

<snip>

> > >  Required properties
> > >  
> > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > 
> > The same comment as the RTC DT patch, you are removing the compatibles
> > documentation for the other supported platforms like stih416-lpc.
> > AFAIK they are required in the driver to get the correct sysconfig register.
> 
> That's intentional.  I haven't yet tested any of this IP on
> STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> sure if this IP even exists on some of the other platforms.  I will
> add them back when support is added to both driver and DTB and I've
> been able to test them.

That was kind of my point, the driver code AFAIK already contains support
for these SoC's.

I would either expect the patch to remove support from the DT docs AND the
driver, or leave it as is.

It seems odd to only change the DT docs, and become unaligned to the
code (this assumes I'm looking at the latest patchset here 
https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

regards,

Peter.

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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

<snip>

> > >  Required properties
> > >  
> > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > 
> > The same comment as the RTC DT patch, you are removing the compatibles
> > documentation for the other supported platforms like stih416-lpc.
> > AFAIK they are required in the driver to get the correct sysconfig register.
> 
> That's intentional.  I haven't yet tested any of this IP on
> STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> sure if this IP even exists on some of the other platforms.  I will
> add them back when support is added to both driver and DTB and I've
> been able to test them.

That was kind of my point, the driver code AFAIK already contains support
for these SoC's.

I would either expect the patch to remove support from the DT docs AND the
driver, or leave it as is.

It seems odd to only change the DT docs, and become unaligned to the
code (this assumes I'm looking at the latest patchset here 
https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

regards,

Peter.

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[STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

On Thu, 07 May 2015, Lee Jones wrote:

<snip>

> > >  Required properties
> > >  
> > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > 
> > The same comment as the RTC DT patch, you are removing the compatibles
> > documentation for the other supported platforms like stih416-lpc.
> > AFAIK they are required in the driver to get the correct sysconfig register.
> 
> That's intentional.  I haven't yet tested any of this IP on
> STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> sure if this IP even exists on some of the other platforms.  I will
> add them back when support is added to both driver and DTB and I've
> been able to test them.

That was kind of my point, the driver code AFAIK already contains support
for these SoC's.

I would either expect the patch to remove support from the DT docs AND the
driver, or leave it as is.

It seems odd to only change the DT docs, and become unaligned to the
code (this assumes I'm looking at the latest patchset here 
https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

regards,

Peter.

Re: [PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Guenter Roeck]

On 05/07/2015 06:38 AM, Lee Jones wrote:
> Initial submission adding support for this IP only included Watchdog and
> the Real-Time Clock.  Now the third (and final) device is enabled this
> trivial patch is required to update the comment in the Watchdog driver
> to encompass Clocksource.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>   drivers/watchdog/st_lpc_wdt.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
> index f32be15..6785afd 100644
> --- a/drivers/watchdog/st_lpc_wdt.c
> +++ b/drivers/watchdog/st_lpc_wdt.c
> @@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
>   		return -EINVAL;
>   	}
>
> -	/* LPC can either run in RTC or WDT mode */
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
>   	if (mode != ST_LPC_MODE_WDT)
>   		return -ENODEV;
>
>

[rtc-linux] Re: [PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Guenter Roeck]

On 05/07/2015 06:38 AM, Lee Jones wrote:
> Initial submission adding support for this IP only included Watchdog and
> the Real-Time Clock.  Now the third (and final) device is enabled this
> trivial patch is required to update the comment in the Watchdog driver
> to encompass Clocksource.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>   drivers/watchdog/st_lpc_wdt.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
> index f32be15..6785afd 100644
> --- a/drivers/watchdog/st_lpc_wdt.c
> +++ b/drivers/watchdog/st_lpc_wdt.c
> @@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
>   		return -EINVAL;
>   	}
>
> -	/* LPC can either run in RTC or WDT mode */
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
>   	if (mode != ST_LPC_MODE_WDT)
>   		return -ENODEV;
>
>

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Re: [PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Guenter Roeck]

On 05/07/2015 06:38 AM, Lee Jones wrote:
> Initial submission adding support for this IP only included Watchdog and
> the Real-Time Clock.  Now the third (and final) device is enabled this
> trivial patch is required to update the comment in the Watchdog driver
> to encompass Clocksource.
>
> Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>

Reviewed-by: Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>

> ---
>   drivers/watchdog/st_lpc_wdt.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
> index f32be15..6785afd 100644
> --- a/drivers/watchdog/st_lpc_wdt.c
> +++ b/drivers/watchdog/st_lpc_wdt.c
> @@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
>   		return -EINVAL;
>   	}
>
> -	/* LPC can either run in RTC or WDT mode */
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
>   	if (mode != ST_LPC_MODE_WDT)
>   		return -ENODEV;
>
>

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[PATCH 05/12] watchdog: st_wdt: Update IP layout information to include Clocksource

[Guenter Roeck]

On 05/07/2015 06:38 AM, Lee Jones wrote:
> Initial submission adding support for this IP only included Watchdog and
> the Real-Time Clock.  Now the third (and final) device is enabled this
> trivial patch is required to update the comment in the Watchdog driver
> to encompass Clocksource.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>

Reviewed-by: Guenter Roeck <linux@roeck-us.net>

> ---
>   drivers/watchdog/st_lpc_wdt.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/watchdog/st_lpc_wdt.c b/drivers/watchdog/st_lpc_wdt.c
> index f32be15..6785afd 100644
> --- a/drivers/watchdog/st_lpc_wdt.c
> +++ b/drivers/watchdog/st_lpc_wdt.c
> @@ -197,7 +197,7 @@ static int st_wdog_probe(struct platform_device *pdev)
>   		return -EINVAL;
>   	}
>
> -	/* LPC can either run in RTC or WDT mode */
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
>   	if (mode != ST_LPC_MODE_WDT)
>   		return -ENODEV;
>
>

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> <snip>
> 
> > > >  Required properties
> > > >  
> > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > 
> > > The same comment as the RTC DT patch, you are removing the compatibles
> > > documentation for the other supported platforms like stih416-lpc.
> > > AFAIK they are required in the driver to get the correct sysconfig register.
> > 
> > That's intentional.  I haven't yet tested any of this IP on
> > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > sure if this IP even exists on some of the other platforms.  I will
> > add them back when support is added to both driver and DTB and I've
> > been able to test them.
> 
> That was kind of my point, the driver code AFAIK already contains support
> for these SoC's.
> 
> I would either expect the patch to remove support from the DT docs AND the
> driver, or leave it as is.
> 
> It seems odd to only change the DT docs, and become unaligned to the
> code (this assumes I'm looking at the latest patchset here 
> https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

The decision to remove these 'supported' platforms was made on the RTC
side, where there is only support for "st,stih407-lpc" in the driver.
I thought it best to mirror that thought over to the Watchdog LPC
bindings, but thought it not really worth ripping out existing support
from the driver.  If others wish to test/use the Watchdog on other
platforms and can read C code, they'll know what to do.

Hopefully all of this will be a non-issue anyway, as I plan to test
this on the other boards I have in my farm and make the necessary
changes in the upcoming weeks.  All should be squared away by the next
merge-window.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
>=20
> On Thu, 07 May 2015, Lee Jones wrote:
>=20
> <snip>
>=20
> > > >  Required properties
> > > > =20
> > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > >=20
> > > The same comment as the RTC DT patch, you are removing the compatible=
s
> > > documentation for the other supported platforms like stih416-lpc.
> > > AFAIK they are required in the driver to get the correct sysconfig re=
gister.
> >=20
> > That's intentional.  I haven't yet tested any of this IP on
> > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > sure if this IP even exists on some of the other platforms.  I will
> > add them back when support is added to both driver and DTB and I've
> > been able to test them.
>=20
> That was kind of my point, the driver code AFAIK already contains support
> for these SoC's.
>=20
> I would either expect the patch to remove support from the DT docs AND th=
e
> driver, or leave it as is.
>=20
> It seems odd to only change the DT docs, and become unaligned to the
> code (this assumes I'm looking at the latest patchset here=20
> https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs=
).

The decision to remove these 'supported' platforms was made on the RTC
side, where there is only support for "st,stih407-lpc" in the driver.
I thought it best to mirror that thought over to the Watchdog LPC
bindings, but thought it not really worth ripping out existing support
from the driver.  If others wish to test/use the Watchdog on other
platforms and can read C code, they'll know what to do.

Hopefully all of this will be a non-issue anyway, as I plan to test
this on the other boards I have in my farm and make the necessary
changes in the upcoming weeks.  All should be squared away by the next
merge-window.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
--=20
You received this message because you are subscribed to "rtc-linux".
Membership options at http://groups.google.com/group/rtc-linux .
Please read http://groups.google.com/group/rtc-linux/web/checklist
before submitting a driver.
---=20
You received this message because you are subscribed to the Google Groups "=
rtc-linux" group.
To unsubscribe from this group and stop receiving emails from it, send an e=
mail to rtc-linux+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> <snip>
> 
> > > >  Required properties
> > > >  
> > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > 
> > > The same comment as the RTC DT patch, you are removing the compatibles
> > > documentation for the other supported platforms like stih416-lpc.
> > > AFAIK they are required in the driver to get the correct sysconfig register.
> > 
> > That's intentional.  I haven't yet tested any of this IP on
> > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > sure if this IP even exists on some of the other platforms.  I will
> > add them back when support is added to both driver and DTB and I've
> > been able to test them.
> 
> That was kind of my point, the driver code AFAIK already contains support
> for these SoC's.
> 
> I would either expect the patch to remove support from the DT docs AND the
> driver, or leave it as is.
> 
> It seems odd to only change the DT docs, and become unaligned to the
> code (this assumes I'm looking at the latest patchset here 
> https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

The decision to remove these 'supported' platforms was made on the RTC
side, where there is only support for "st,stih407-lpc" in the driver.
I thought it best to mirror that thought over to the Watchdog LPC
bindings, but thought it not really worth ripping out existing support
from the driver.  If others wish to test/use the Watchdog on other
platforms and can read C code, they'll know what to do.

Hopefully all of this will be a non-issue anyway, as I plan to test
this on the other boards I have in my farm and make the necessary
changes in the upcoming weeks.  All should be squared away by the next
merge-window.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in
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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> <snip>
> 
> > > >  Required properties
> > > >  
> > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > 
> > > The same comment as the RTC DT patch, you are removing the compatibles
> > > documentation for the other supported platforms like stih416-lpc.
> > > AFAIK they are required in the driver to get the correct sysconfig register.
> > 
> > That's intentional.  I haven't yet tested any of this IP on
> > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > sure if this IP even exists on some of the other platforms.  I will
> > add them back when support is added to both driver and DTB and I've
> > been able to test them.
> 
> That was kind of my point, the driver code AFAIK already contains support
> for these SoC's.
> 
> I would either expect the patch to remove support from the DT docs AND the
> driver, or leave it as is.
> 
> It seems odd to only change the DT docs, and become unaligned to the
> code (this assumes I'm looking at the latest patchset here 
> https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

The decision to remove these 'supported' platforms was made on the RTC
side, where there is only support for "st,stih407-lpc" in the driver.
I thought it best to mirror that thought over to the Watchdog LPC
bindings, but thought it not really worth ripping out existing support
from the driver.  If others wish to test/use the Watchdog on other
platforms and can read C code, they'll know what to do.

Hopefully all of this will be a non-issue anyway, as I plan to test
this on the other boards I have in my farm and make the necessary
changes in the upcoming weeks.  All should be squared away by the next
merge-window.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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[STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Thu, 07 May 2015, Peter Griffin wrote:

> Hi Lee,
> 
> On Thu, 07 May 2015, Lee Jones wrote:
> 
> <snip>
> 
> > > >  Required properties
> > > >  
> > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > 
> > > The same comment as the RTC DT patch, you are removing the compatibles
> > > documentation for the other supported platforms like stih416-lpc.
> > > AFAIK they are required in the driver to get the correct sysconfig register.
> > 
> > That's intentional.  I haven't yet tested any of this IP on
> > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > sure if this IP even exists on some of the other platforms.  I will
> > add them back when support is added to both driver and DTB and I've
> > been able to test them.
> 
> That was kind of my point, the driver code AFAIK already contains support
> for these SoC's.
> 
> I would either expect the patch to remove support from the DT docs AND the
> driver, or leave it as is.
> 
> It seems odd to only change the DT docs, and become unaligned to the
> code (this assumes I'm looking at the latest patchset here 
> https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).

The decision to remove these 'supported' platforms was made on the RTC
side, where there is only support for "st,stih407-lpc" in the driver.
I thought it best to mirror that thought over to the Watchdog LPC
bindings, but thought it not really worth ripping out existing support
from the driver.  If others wish to test/use the Watchdog on other
platforms and can read C code, they'll know what to do.

Hopefully all of this will be a non-issue anyway, as I plan to test
this on the other boards I have in my farm and make the necessary
changes in the upcoming weeks.  All should be squared away by the next
merge-window.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

<snip>

On Fri, 08 May 2015, Lee Jones wrote:
> > > > >  
> > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > 
> > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > documentation for the other supported platforms like stih416-lpc.
> > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > 
> > > That's intentional.  I haven't yet tested any of this IP on
> > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > sure if this IP even exists on some of the other platforms.  I will
> > > add them back when support is added to both driver and DTB and I've
> > > been able to test them.
> > 
> > That was kind of my point, the driver code AFAIK already contains support
> > for these SoC's.
> > 
> > I would either expect the patch to remove support from the DT docs AND the
> > driver, or leave it as is.
> > 
> > It seems odd to only change the DT docs, and become unaligned to the
> > code (this assumes I'm looking at the latest patchset here 
> > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> 
> The decision to remove these 'supported' platforms was made on the RTC
> side, where there is only support for "st,stih407-lpc" in the driver.

The change makes sense in the RTC case then.

> I thought it best to mirror that thought over to the Watchdog LPC
> bindings,

Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
driver code.

> but thought it not really worth ripping out existing support
> from the driver.  

I agree it is not worth ripping out existing support only to add it back in. Equally
I can't see the point in doing this with the DT documentation either.

> If others wish to test/use the Watchdog on other
> platforms and can read C code, they'll know what to do.

Yes, and without this change they could also read the documentation. Your doing a
v2 anyway, it seems trivial to fix this at the same time.

regards,

Peter.

[rtc-linux] Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

<snip>

On Fri, 08 May 2015, Lee Jones wrote:
> > > > >  
> > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > 
> > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > documentation for the other supported platforms like stih416-lpc.
> > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > 
> > > That's intentional.  I haven't yet tested any of this IP on
> > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > sure if this IP even exists on some of the other platforms.  I will
> > > add them back when support is added to both driver and DTB and I've
> > > been able to test them.
> > 
> > That was kind of my point, the driver code AFAIK already contains support
> > for these SoC's.
> > 
> > I would either expect the patch to remove support from the DT docs AND the
> > driver, or leave it as is.
> > 
> > It seems odd to only change the DT docs, and become unaligned to the
> > code (this assumes I'm looking at the latest patchset here 
> > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> 
> The decision to remove these 'supported' platforms was made on the RTC
> side, where there is only support for "st,stih407-lpc" in the driver.

The change makes sense in the RTC case then.

> I thought it best to mirror that thought over to the Watchdog LPC
> bindings,

Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
driver code.

> but thought it not really worth ripping out existing support
> from the driver.  

I agree it is not worth ripping out existing support only to add it back in. Equally
I can't see the point in doing this with the DT documentation either.

> If others wish to test/use the Watchdog on other
> platforms and can read C code, they'll know what to do.

Yes, and without this change they could also read the documentation. Your doing a
v2 anyway, it seems trivial to fix this at the same time.

regards,

Peter.

-- 
-- 
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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

<snip>

On Fri, 08 May 2015, Lee Jones wrote:
> > > > >  
> > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > 
> > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > documentation for the other supported platforms like stih416-lpc.
> > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > 
> > > That's intentional.  I haven't yet tested any of this IP on
> > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > sure if this IP even exists on some of the other platforms.  I will
> > > add them back when support is added to both driver and DTB and I've
> > > been able to test them.
> > 
> > That was kind of my point, the driver code AFAIK already contains support
> > for these SoC's.
> > 
> > I would either expect the patch to remove support from the DT docs AND the
> > driver, or leave it as is.
> > 
> > It seems odd to only change the DT docs, and become unaligned to the
> > code (this assumes I'm looking at the latest patchset here 
> > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> 
> The decision to remove these 'supported' platforms was made on the RTC
> side, where there is only support for "st,stih407-lpc" in the driver.

The change makes sense in the RTC case then.

> I thought it best to mirror that thought over to the Watchdog LPC
> bindings,

Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
driver code.

> but thought it not really worth ripping out existing support
> from the driver.  

I agree it is not worth ripping out existing support only to add it back in. Equally
I can't see the point in doing this with the DT documentation either.

> If others wish to test/use the Watchdog on other
> platforms and can read C code, they'll know what to do.

Yes, and without this change they could also read the documentation. Your doing a
v2 anyway, it seems trivial to fix this at the same time.

regards,

Peter.
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[STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Peter Griffin]

Hi Lee,

<snip>

On Fri, 08 May 2015, Lee Jones wrote:
> > > > >  
> > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > 
> > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > documentation for the other supported platforms like stih416-lpc.
> > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > 
> > > That's intentional.  I haven't yet tested any of this IP on
> > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > sure if this IP even exists on some of the other platforms.  I will
> > > add them back when support is added to both driver and DTB and I've
> > > been able to test them.
> > 
> > That was kind of my point, the driver code AFAIK already contains support
> > for these SoC's.
> > 
> > I would either expect the patch to remove support from the DT docs AND the
> > driver, or leave it as is.
> > 
> > It seems odd to only change the DT docs, and become unaligned to the
> > code (this assumes I'm looking at the latest patchset here 
> > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> 
> The decision to remove these 'supported' platforms was made on the RTC
> side, where there is only support for "st,stih407-lpc" in the driver.

The change makes sense in the RTC case then.

> I thought it best to mirror that thought over to the Watchdog LPC
> bindings,

Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
driver code.

> but thought it not really worth ripping out existing support
> from the driver.  

I agree it is not worth ripping out existing support only to add it back in. Equally
I can't see the point in doing this with the DT documentation either.

> If others wish to test/use the Watchdog on other
> platforms and can read C code, they'll know what to do.

Yes, and without this change they could also read the documentation. Your doing a
v2 anyway, it seems trivial to fix this at the same time.

regards,

Peter.

Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Fri, 08 May 2015, Peter Griffin wrote:
> On Fri, 08 May 2015, Lee Jones wrote:
> > > > > >  
> > > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > > 
> > > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > > documentation for the other supported platforms like stih416-lpc.
> > > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > > 
> > > > That's intentional.  I haven't yet tested any of this IP on
> > > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > > sure if this IP even exists on some of the other platforms.  I will
> > > > add them back when support is added to both driver and DTB and I've
> > > > been able to test them.
> > > 
> > > That was kind of my point, the driver code AFAIK already contains support
> > > for these SoC's.
> > > 
> > > I would either expect the patch to remove support from the DT docs AND the
> > > driver, or leave it as is.
> > > 
> > > It seems odd to only change the DT docs, and become unaligned to the
> > > code (this assumes I'm looking at the latest patchset here 
> > > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> > 
> > The decision to remove these 'supported' platforms was made on the RTC
> > side, where there is only support for "st,stih407-lpc" in the driver.
> 
> The change makes sense in the RTC case then.
> 
> > I thought it best to mirror that thought over to the Watchdog LPC
> > bindings,
> 
> Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
> driver code.

Fair enough.  I'll add the 'supported' compatibles back in.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Fri, 08 May 2015, Peter Griffin wrote:
> On Fri, 08 May 2015, Lee Jones wrote:
> > > > > > =20
> > > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-l=
pc"
> > > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > >=20
> > > > > The same comment as the RTC DT patch, you are removing the compat=
ibles
> > > > > documentation for the other supported platforms like stih416-lpc.
> > > > > AFAIK they are required in the driver to get the correct sysconfi=
g register.
> > > >=20
> > > > That's intentional.  I haven't yet tested any of this IP on
> > > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > > sure if this IP even exists on some of the other platforms.  I will
> > > > add them back when support is added to both driver and DTB and I've
> > > > been able to test them.
> > >=20
> > > That was kind of my point, the driver code AFAIK already contains sup=
port
> > > for these SoC's.
> > >=20
> > > I would either expect the patch to remove support from the DT docs AN=
D the
> > > driver, or leave it as is.
> > >=20
> > > It seems odd to only change the DT docs, and become unaligned to the
> > > code (this assumes I'm looking at the latest patchset here=20
> > > https://lkml.org/lkml/2015/3/4/1088 which includes support for these =
SoCs).
> >=20
> > The decision to remove these 'supported' platforms was made on the RTC
> > side, where there is only support for "st,stih407-lpc" in the driver.
>=20
> The change makes sense in the RTC case then.
>=20
> > I thought it best to mirror that thought over to the Watchdog LPC
> > bindings,
>=20
> Why? This is the bit I disagree with, the wdt DT docs IMHO should match t=
he wdt
> driver code.

Fair enough.  I'll add the 'supported' compatibles back in.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Fri, 08 May 2015, Peter Griffin wrote:
> On Fri, 08 May 2015, Lee Jones wrote:
> > > > > >  
> > > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > > 
> > > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > > documentation for the other supported platforms like stih416-lpc.
> > > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > > 
> > > > That's intentional.  I haven't yet tested any of this IP on
> > > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > > sure if this IP even exists on some of the other platforms.  I will
> > > > add them back when support is added to both driver and DTB and I've
> > > > been able to test them.
> > > 
> > > That was kind of my point, the driver code AFAIK already contains support
> > > for these SoC's.
> > > 
> > > I would either expect the patch to remove support from the DT docs AND the
> > > driver, or leave it as is.
> > > 
> > > It seems odd to only change the DT docs, and become unaligned to the
> > > code (this assumes I'm looking at the latest patchset here 
> > > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> > 
> > The decision to remove these 'supported' platforms was made on the RTC
> > side, where there is only support for "st,stih407-lpc" in the driver.
> 
> The change makes sense in the RTC case then.
> 
> > I thought it best to mirror that thought over to the Watchdog LPC
> > bindings,
> 
> Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
> driver code.

Fair enough.  I'll add the 'supported' compatibles back in.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Fri, 08 May 2015, Peter Griffin wrote:
> On Fri, 08 May 2015, Lee Jones wrote:
> > > > > >  
> > > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > > 
> > > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > > documentation for the other supported platforms like stih416-lpc.
> > > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > > 
> > > > That's intentional.  I haven't yet tested any of this IP on
> > > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > > sure if this IP even exists on some of the other platforms.  I will
> > > > add them back when support is added to both driver and DTB and I've
> > > > been able to test them.
> > > 
> > > That was kind of my point, the driver code AFAIK already contains support
> > > for these SoC's.
> > > 
> > > I would either expect the patch to remove support from the DT docs AND the
> > > driver, or leave it as is.
> > > 
> > > It seems odd to only change the DT docs, and become unaligned to the
> > > code (this assumes I'm looking at the latest patchset here 
> > > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> > 
> > The decision to remove these 'supported' platforms was made on the RTC
> > side, where there is only support for "st,stih407-lpc" in the driver.
> 
> The change makes sense in the RTC case then.
> 
> > I thought it best to mirror that thought over to the Watchdog LPC
> > bindings,
> 
> Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
> driver code.

Fair enough.  I'll add the 'supported' compatibles back in.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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[STLinux Kernel] [PATCH 06/12] watchdog: bindings: Supply knowledge of a third supported device - clocksource

[Lee Jones]

On Fri, 08 May 2015, Peter Griffin wrote:
> On Fri, 08 May 2015, Lee Jones wrote:
> > > > > >  
> > > > > > -- compatible 	: Must be one of: "st,stih407-lpc" "st,stih416-lpc"
> > > > > > -				  "st,stih415-lpc" "st,stid127-lpc"
> > > > > > +- compatible 	: Must be one of: "st,stih407-lpc"
> > > > > 
> > > > > The same comment as the RTC DT patch, you are removing the compatibles
> > > > > documentation for the other supported platforms like stih416-lpc.
> > > > > AFAIK they are required in the driver to get the correct sysconfig register.
> > > > 
> > > > That's intentional.  I haven't yet tested any of this IP on
> > > > STiH41{5,6} & STiH127.  Due to lack of documentation, I'm not even
> > > > sure if this IP even exists on some of the other platforms.  I will
> > > > add them back when support is added to both driver and DTB and I've
> > > > been able to test them.
> > > 
> > > That was kind of my point, the driver code AFAIK already contains support
> > > for these SoC's.
> > > 
> > > I would either expect the patch to remove support from the DT docs AND the
> > > driver, or leave it as is.
> > > 
> > > It seems odd to only change the DT docs, and become unaligned to the
> > > code (this assumes I'm looking at the latest patchset here 
> > > https://lkml.org/lkml/2015/3/4/1088 which includes support for these SoCs).
> > 
> > The decision to remove these 'supported' platforms was made on the RTC
> > side, where there is only support for "st,stih407-lpc" in the driver.
> 
> The change makes sense in the RTC case then.
> 
> > I thought it best to mirror that thought over to the Watchdog LPC
> > bindings,
> 
> Why? This is the bit I disagree with, the wdt DT docs IMHO should match the wdt
> driver code.

Fair enough.  I'll add the 'supported' compatibles back in.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> +	bool
> +	depends on CLKSRC_ST_LPC
> +	default y
> +	help
> +	  Use Low Power controller timer clock source as sched_clock

This adds, as far as I can see, a Kconfig symbol that will always be in
lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.

Are there plans to break that lockstep in the future?

Thanks,


Paul Bolle

[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> +	bool
> +	depends on CLKSRC_ST_LPC
> +	default y
> +	help
> +	  Use Low Power controller timer clock source as sched_clock

This adds, as far as I can see, a Kconfig symbol that will always be in
lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.

Are there plans to break that lockstep in the future?

Thanks,


Paul Bolle

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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> +	bool
> +	depends on CLKSRC_ST_LPC
> +	default y
> +	help
> +	  Use Low Power controller timer clock source as sched_clock

This adds, as far as I can see, a Kconfig symbol that will always be in
lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.

Are there plans to break that lockstep in the future?

Thanks,


Paul Bolle

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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> +	bool
> +	depends on CLKSRC_ST_LPC
> +	default y
> +	help
> +	  Use Low Power controller timer clock source as sched_clock

This adds, as far as I can see, a Kconfig symbol that will always be in
lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.

Are there plans to break that lockstep in the future?

Thanks,


Paul Bolle

Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:
> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > +	bool
> > +	depends on CLKSRC_ST_LPC
> > +	default y
> > +	help
> > +	  Use Low Power controller timer clock source as sched_clock
> 
> This adds, as far as I can see, a Kconfig symbol that will always be in
> lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> 
> Are there plans to break that lockstep in the future?

What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:
> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
>=20
> > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > +	bool
> > +	depends on CLKSRC_ST_LPC
> > +	default y
> > +	help
> > +	  Use Low Power controller timer clock source as sched_clock
>=20
> This adds, as far as I can see, a Kconfig symbol that will always be in
> lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
>=20
> Are there plans to break that lockstep in the future?

What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=3Dn?

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:
> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > +	bool
> > +	depends on CLKSRC_ST_LPC
> > +	default y
> > +	help
> > +	  Use Low Power controller timer clock source as sched_clock
> 
> This adds, as far as I can see, a Kconfig symbol that will always be in
> lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> 
> Are there plans to break that lockstep in the future?

What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:
> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > +	bool
> > +	depends on CLKSRC_ST_LPC
> > +	default y
> > +	help
> > +	  Use Low Power controller timer clock source as sched_clock
> 
> This adds, as far as I can see, a Kconfig symbol that will always be in
> lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> 
> Are there plans to break that lockstep in the future?

What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:
> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > +	bool
> > +	depends on CLKSRC_ST_LPC
> > +	default y
> > +	help
> > +	  Use Low Power controller timer clock source as sched_clock
> 
> This adds, as far as I can see, a Kconfig symbol that will always be in
> lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> 
> Are there plans to break that lockstep in the future?

What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> On Fri, 08 May 2015, Paul Bolle wrote:
> > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > --- a/drivers/clocksource/Kconfig
> > > +++ b/drivers/clocksource/Kconfig
> > 
> > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > +	bool
> > > +	depends on CLKSRC_ST_LPC
> > > +	default y
> > > +	help
> > > +	  Use Low Power controller timer clock source as sched_clock
> > 
> > This adds, as far as I can see, a Kconfig symbol that will always be in
> > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > 
> > Are there plans to break that lockstep in the future?
> 
> What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
would need
	bool "A very short description"

to be able to set these independently.

But now I notice that I missed that there appears to be a problem with
CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Thanks,


Paul Bolle

[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> On Fri, 08 May 2015, Paul Bolle wrote:
> > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > --- a/drivers/clocksource/Kconfig
> > > +++ b/drivers/clocksource/Kconfig
> > 
> > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > +	bool
> > > +	depends on CLKSRC_ST_LPC
> > > +	default y
> > > +	help
> > > +	  Use Low Power controller timer clock source as sched_clock
> > 
> > This adds, as far as I can see, a Kconfig symbol that will always be in
> > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > 
> > Are there plans to break that lockstep in the future?
> 
> What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
would need
	bool "A very short description"

to be able to set these independently.

But now I notice that I missed that there appears to be a problem with
CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Thanks,


Paul Bolle

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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> On Fri, 08 May 2015, Paul Bolle wrote:
> > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > --- a/drivers/clocksource/Kconfig
> > > +++ b/drivers/clocksource/Kconfig
> > 
> > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > +	bool
> > > +	depends on CLKSRC_ST_LPC
> > > +	default y
> > > +	help
> > > +	  Use Low Power controller timer clock source as sched_clock
> > 
> > This adds, as far as I can see, a Kconfig symbol that will always be in
> > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > 
> > Are there plans to break that lockstep in the future?
> 
> What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
would need
	bool "A very short description"

to be able to set these independently.

But now I notice that I missed that there appears to be a problem with
CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Thanks,


Paul Bolle

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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> On Fri, 08 May 2015, Paul Bolle wrote:
> > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > --- a/drivers/clocksource/Kconfig
> > > +++ b/drivers/clocksource/Kconfig
> > 
> > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > +	bool
> > > +	depends on CLKSRC_ST_LPC
> > > +	default y
> > > +	help
> > > +	  Use Low Power controller timer clock source as sched_clock
> > 
> > This adds, as far as I can see, a Kconfig symbol that will always be in
> > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > 
> > Are there plans to break that lockstep in the future?
> 
> What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?

If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
would need
	bool "A very short description"

to be able to set these independently.

But now I notice that I missed that there appears to be a problem with
CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Thanks,


Paul Bolle

Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI

By itself this does nothing. You can't set this symbol to 'y', even if
ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
11/12) otherwise it would be inert. But as ARCH_STI selects
CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

Are other selects of CLKSRC_ST_LPC expected to be added in the future?
If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
directly. (But that forces you to move the select statement below into
the ARCH_STI entry, which might be ugly.)

> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.

(Please add an empty line.)

>  endmenu

Thanks,


Paul Bolle

[rtc-linux] Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI

By itself this does nothing. You can't set this symbol to 'y', even if
ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
11/12) otherwise it would be inert. But as ARCH_STI selects
CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

Are other selects of CLKSRC_ST_LPC expected to be added in the future?
If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
directly. (But that forces you to move the select statement below into
the ARCH_STI entry, which might be ugly.)

> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.

(Please add an empty line.)

>  endmenu

Thanks,


Paul Bolle

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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI

By itself this does nothing. You can't set this symbol to 'y', even if
ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
11/12) otherwise it would be inert. But as ARCH_STI selects
CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

Are other selects of CLKSRC_ST_LPC expected to be added in the future?
If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
directly. (But that forces you to move the select statement below into
the ARCH_STI entry, which might be ugly.)

> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.

(Please add an empty line.)

>  endmenu

Thanks,


Paul Bolle

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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig

> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI

By itself this does nothing. You can't set this symbol to 'y', even if
ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
11/12) otherwise it would be inert. But as ARCH_STI selects
CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

Are other selects of CLKSRC_ST_LPC expected to be added in the future?
If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
directly. (But that forces you to move the select statement below into
the ARCH_STI entry, which might be ugly.)

> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.

(Please add an empty line.)

>  endmenu

Thanks,


Paul Bolle

Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC
> > +	bool
> > +	depends on ARCH_STI
> 
> By itself this does nothing. You can't set this symbol to 'y', even if
> ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
> 11/12) otherwise it would be inert. But as ARCH_STI selects
> CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

I guess this is more of a representative dependency, but you're right,
the likelihood is that no one is likely to accidentally enable it.

I can remove it.

> Are other selects of CLKSRC_ST_LPC expected to be added in the future?
> If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
> case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
> directly. (But that forces you to move the select statement below into
> the ARCH_STI entry, which might be ugly.)

Although true, there might be cases where we need to stop this from
being enabled on all ARCH_STI platforms.  It'll be easier to move
CLKSRC_ST_LPC around in arch code than to start renaming this symbol.

I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
about the alternative.

> > +	select CLKSRC_OF if OF
> > +	help
> > +	  Enable this option to use the Low Power controller timer
> > +	  as clocksource.
> 
> (Please add an empty line.)

I believe the new line comes in the next patch.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
>=20
> > +config CLKSRC_ST_LPC
> > +	bool
> > +	depends on ARCH_STI
>=20
> By itself this does nothing. You can't set this symbol to 'y', even if
> ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
> 11/12) otherwise it would be inert. But as ARCH_STI selects
> CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

I guess this is more of a representative dependency, but you're right,
the likelihood is that no one is likely to accidentally enable it.

I can remove it.

> Are other selects of CLKSRC_ST_LPC expected to be added in the future?
> If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
> case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
> directly. (But that forces you to move the select statement below into
> the ARCH_STI entry, which might be ugly.)

Although true, there might be cases where we need to stop this from
being enabled on all ARCH_STI platforms.  It'll be easier to move
CLKSRC_ST_LPC around in arch code than to start renaming this symbol.

I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
about the alternative.

> > +	select CLKSRC_OF if OF
> > +	help
> > +	  Enable this option to use the Low Power controller timer
> > +	  as clocksource.
>=20
> (Please add an empty line.)

I believe the new line comes in the next patch.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC
> > +	bool
> > +	depends on ARCH_STI
> 
> By itself this does nothing. You can't set this symbol to 'y', even if
> ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
> 11/12) otherwise it would be inert. But as ARCH_STI selects
> CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

I guess this is more of a representative dependency, but you're right,
the likelihood is that no one is likely to accidentally enable it.

I can remove it.

> Are other selects of CLKSRC_ST_LPC expected to be added in the future?
> If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
> case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
> directly. (But that forces you to move the select statement below into
> the ARCH_STI entry, which might be ugly.)

Although true, there might be cases where we need to stop this from
being enabled on all ARCH_STI platforms.  It'll be easier to move
CLKSRC_ST_LPC around in arch code than to start renaming this symbol.

I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
about the alternative.

> > +	select CLKSRC_OF if OF
> > +	help
> > +	  Enable this option to use the Low Power controller timer
> > +	  as clocksource.
> 
> (Please add an empty line.)

I believe the new line comes in the next patch.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > --- a/drivers/clocksource/Kconfig
> > +++ b/drivers/clocksource/Kconfig
> 
> > +config CLKSRC_ST_LPC
> > +	bool
> > +	depends on ARCH_STI
> 
> By itself this does nothing. You can't set this symbol to 'y', even if
> ARCH_STI is 'y', right? Of course, ARCH_STI will select this symbol (see
> 11/12) otherwise it would be inert. But as ARCH_STI selects
> CLKSRC_ST_LPC I'd say this dependency isn't actually needed.

I guess this is more of a representative dependency, but you're right,
the likelihood is that no one is likely to accidentally enable it.

I can remove it.

> Are other selects of CLKSRC_ST_LPC expected to be added in the future?
> If not, CLKSRC_ST_LPC should operate in lockstep with ARCH_STI. In that
> case you might as well not bother with CLKSRC_ST_LPC and use ARCH_STI
> directly. (But that forces you to move the select statement below into
> the ARCH_STI entry, which might be ugly.)

Although true, there might be cases where we need to stop this from
being enabled on all ARCH_STI platforms.  It'll be easier to move
CLKSRC_ST_LPC around in arch code than to start renaming this symbol.

I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
about the alternative.

> > +	select CLKSRC_OF if OF
> > +	help
> > +	  Enable this option to use the Low Power controller timer
> > +	  as clocksource.
> 
> (Please add an empty line.)

I believe the new line comes in the next patch.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> > On Fri, 08 May 2015, Paul Bolle wrote:
> > > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > > --- a/drivers/clocksource/Kconfig
> > > > +++ b/drivers/clocksource/Kconfig
> > > 
> > > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > > +	bool
> > > > +	depends on CLKSRC_ST_LPC
> > > > +	default y
> > > > +	help
> > > > +	  Use Low Power controller timer clock source as sched_clock
> > > 
> > > This adds, as far as I can see, a Kconfig symbol that will always be in
> > > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > > 
> > > Are there plans to break that lockstep in the future?
> > 
> > What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?
> 
> If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
> would need
> 	bool "A very short description"
> 
> to be able to set these independently.
> 
> But now I notice that I missed that there appears to be a problem with
> CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Ah, you mean from menuconfig.  I almost forgot what that was. ;)

I can add a menu option, no problem.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> > On Fri, 08 May 2015, Paul Bolle wrote:
> > > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > > --- a/drivers/clocksource/Kconfig
> > > > +++ b/drivers/clocksource/Kconfig
> > >=20
> > > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > > +	bool
> > > > +	depends on CLKSRC_ST_LPC
> > > > +	default y
> > > > +	help
> > > > +	  Use Low Power controller timer clock source as sched_clock
> > >=20
> > > This adds, as far as I can see, a Kconfig symbol that will always be =
in
> > > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y=
'.
> > >=20
> > > Are there plans to break that lockstep in the future?
> >=20
> > What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=3Dn?
>=20
> If CLKSRC_ST_LPC=3Dy you mean? The lack of a prompt, I'd say. Ie, you
> would need
> 	bool "A very short description"
>=20
> to be able to set these independently.
>=20
> But now I notice that I missed that there appears to be a problem with
> CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Ah, you mean from menuconfig.  I almost forgot what that was. ;)

I can add a menu option, no problem.

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> > On Fri, 08 May 2015, Paul Bolle wrote:
> > > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > > --- a/drivers/clocksource/Kconfig
> > > > +++ b/drivers/clocksource/Kconfig
> > > 
> > > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > > +	bool
> > > > +	depends on CLKSRC_ST_LPC
> > > > +	default y
> > > > +	help
> > > > +	  Use Low Power controller timer clock source as sched_clock
> > > 
> > > This adds, as far as I can see, a Kconfig symbol that will always be in
> > > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > > 
> > > Are there plans to break that lockstep in the future?
> > 
> > What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?
> 
> If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
> would need
> 	bool "A very short description"
> 
> to be able to set these independently.
> 
> But now I notice that I missed that there appears to be a problem with
> CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Ah, you mean from menuconfig.  I almost forgot what that was. ;)

I can add a menu option, no problem.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> > On Fri, 08 May 2015, Paul Bolle wrote:
> > > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > > --- a/drivers/clocksource/Kconfig
> > > > +++ b/drivers/clocksource/Kconfig
> > > 
> > > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > > +	bool
> > > > +	depends on CLKSRC_ST_LPC
> > > > +	default y
> > > > +	help
> > > > +	  Use Low Power controller timer clock source as sched_clock
> > > 
> > > This adds, as far as I can see, a Kconfig symbol that will always be in
> > > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > > 
> > > Are there plans to break that lockstep in the future?
> > 
> > What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?
> 
> If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
> would need
> 	bool "A very short description"
> 
> to be able to set these independently.
> 
> But now I notice that I missed that there appears to be a problem with
> CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Ah, you mean from menuconfig.  I almost forgot what that was. ;)

I can add a menu option, no problem.

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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Lee Jones]

On Fri, 08 May 2015, Paul Bolle wrote:

> On Fri, 2015-05-08 at 10:36 +0100, Lee Jones wrote:
> > On Fri, 08 May 2015, Paul Bolle wrote:
> > > On Thu, 2015-05-07 at 14:38 +0100, Lee Jones wrote:
> > > > --- a/drivers/clocksource/Kconfig
> > > > +++ b/drivers/clocksource/Kconfig
> > > 
> > > > +config CLKSRC_ST_LPC_TIMER_SCHED_CLOCK
> > > > +	bool
> > > > +	depends on CLKSRC_ST_LPC
> > > > +	default y
> > > > +	help
> > > > +	  Use Low Power controller timer clock source as sched_clock
> > > 
> > > This adds, as far as I can see, a Kconfig symbol that will always be in
> > > lockstep with CLKSRC_ST_LPC. Ie, CLKSRC_ST_LPC and
> > > CLKSRC_ST_LPC_TIMER_SCHED_CLOCK will always both be 'n' or both be 'y'.
> > > 
> > > Are there plans to break that lockstep in the future?
> > 
> > What's stopping CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=n?
> 
> If CLKSRC_ST_LPC=y you mean? The lack of a prompt, I'd say. Ie, you
> would need
> 	bool "A very short description"
> 
> to be able to set these independently.
> 
> But now I notice that I missed that there appears to be a problem with
> CLKSRC_ST_LPC too. I'll reply to 2/12 shortly.

Ah, you mean from menuconfig.  I almost forgot what that was. ;)

I can add a menu option, no problem.

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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Fri, 2015-05-08 at 11:28 +0100, Lee Jones wrote:
> I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
> about the alternative.

No, I'm not passionate about the alternative, so keeping CLKSRC_ST_LPC
is fine with me.

Thanks,


Paul Bolle

[rtc-linux] Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Fri, 2015-05-08 at 11:28 +0100, Lee Jones wrote:
> I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
> about the alternative.

No, I'm not passionate about the alternative, so keeping CLKSRC_ST_LPC
is fine with me.

Thanks,


Paul Bolle



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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Paul Bolle]

On Fri, 2015-05-08 at 11:28 +0100, Lee Jones wrote:
> I'd prefer to keep this as CLKSRC_ST_LPC if you're not passionate
> about the alternative.

No, I'm not passionate about the alternative, so keeping CLKSRC_ST_LPC
is fine with me.

Thanks,


Paul Bolle

Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
> 
> I can add a menu option, no problem.

It's not just menuconfig:
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
    $ vim .config 
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    # CONFIG_CLKSRC_ST_LPC is not set
    # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
    $ make ARCH=arm silentoldconfig
    scripts/kconfig/conf  --silentoldconfig Kconfig
    #
    # configuration written to .config
    #
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y

So I think that, if you want to be able to set
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
you need to add a prompt. Or have you found a way around this?

Thanks,


Paul Bolle

[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
> 
> I can add a menu option, no problem.

It's not just menuconfig:
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
    $ vim .config 
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    # CONFIG_CLKSRC_ST_LPC is not set
    # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
    $ make ARCH=arm silentoldconfig
    scripts/kconfig/conf  --silentoldconfig Kconfig
    #
    # configuration written to .config
    #
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y

So I think that, if you want to be able to set
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
you need to add a prompt. Or have you found a way around this?

Thanks,


Paul Bolle

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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
> 
> I can add a menu option, no problem.

It's not just menuconfig:
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
    $ vim .config 
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    # CONFIG_CLKSRC_ST_LPC is not set
    # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
    $ make ARCH=arm silentoldconfig
    scripts/kconfig/conf  --silentoldconfig Kconfig
    #
    # configuration written to .config
    #
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y

So I think that, if you want to be able to set
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
you need to add a prompt. Or have you found a way around this?

Thanks,


Paul Bolle

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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
> 
> I can add a menu option, no problem.

It's not just menuconfig:
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
    $ vim .config 
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    # CONFIG_CLKSRC_ST_LPC is not set
    # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
    $ make ARCH=arm silentoldconfig
    scripts/kconfig/conf  --silentoldconfig Kconfig
    #
    # configuration written to .config
    #
    $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config 
    CONFIG_ARCH_STI=y
    CONFIG_CLKSRC_ST_LPC=y
    CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y

So I think that, if you want to be able to set
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
you need to add a prompt. Or have you found a way around this?

Thanks,


Paul Bolle

Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Alexandre Belloni]

On 07/05/2015 at 14:38:39 +0100, Lee Jones wrote :
> Initial submission adding support for this IP only included Watchdog and
> the Real-Time Clock.  Now the third (and final) device is enabled this
> trivial patch is required to update the comment in the RTC driver to
> encompass Clocksource.
> 
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

I'm guessing this will go through the mfd tree along with the driver?

> ---
>  drivers/rtc/rtc-st-lpc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
> index 3f9d0ac..74c0a33 100644
> --- a/drivers/rtc/rtc-st-lpc.c
> +++ b/drivers/rtc/rtc-st-lpc.c
> @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> -	/* LPC can either run in RTC or WDT mode */
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
>  	if (mode != ST_LPC_MODE_RTC)
>  		return -ENODEV;
>  
> -- 
> 1.9.1
> 
> -- 
> -- 
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[rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Alexandre Belloni]

On 07/05/2015 at 14:38:39 +0100, Lee Jones wrote :
> Initial submission adding support for this IP only included Watchdog and
> the Real-Time Clock.  Now the third (and final) device is enabled this
> trivial patch is required to update the comment in the RTC driver to
> encompass Clocksource.
> 
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

I'm guessing this will go through the mfd tree along with the driver?

> ---
>  drivers/rtc/rtc-st-lpc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
> index 3f9d0ac..74c0a33 100644
> --- a/drivers/rtc/rtc-st-lpc.c
> +++ b/drivers/rtc/rtc-st-lpc.c
> @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
>  		return -EINVAL;
>  	}
>  
> -	/* LPC can either run in RTC or WDT mode */
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
>  	if (mode != ST_LPC_MODE_RTC)
>  		return -ENODEV;
>  
> -- 
> 1.9.1
> 
> -- 
> -- 
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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Daniel Lezcano]

On 05/07/2015 03:38 PM, Lee Jones wrote:
> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.
>
> The ST LPC Clocksource IP can be used as the system (tick) timer.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>   drivers/clocksource/Kconfig         |   8 +++
>   drivers/clocksource/Makefile        |   1 +
>   drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
>   3 files changed, 132 insertions(+)
>   create mode 100644 drivers/clocksource/clksrc_st_lpc.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 68161f7..ac424cf 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -250,4 +250,12 @@ config CLKSRC_PXA
>   	help
>   	  This enables OST0 support available on PXA and SA-11x0
>   	  platforms.
> +
> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI
> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.
>   endmenu
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 752d5c7..e08da4d 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
>   obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
>   obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
>   obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> +obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> new file mode 100644
> index 0000000..18a7dcd0
> --- /dev/null
> +++ b/drivers/clocksource/clksrc_st_lpc.c
> @@ -0,0 +1,123 @@
> +/*
> + * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> + *
> + * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
> + *
> + * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> + *	      Ajit Pal Singh <ajitpal.singh@st.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clocksource.h>
> +#include <linux/init.h>
> +#include <linux/of_address.h>
> +#include <linux/slab.h>
> +
> +#include <dt-bindings/mfd/st-lpc.h>
> +
> +/* Low Power Timer */
> +#define LPC_LPT_LSB_OFF		0x400
> +#define LPC_LPT_MSB_OFF		0x404
> +#define LPC_LPT_START_OFF	0x408
> +
> +static struct st_clksrc_ddata {
> +	struct clk		*clk;
> +	void __iomem		*base;
> +} ddata;
> +
> +static void st_clksrc_reset(void)
> +{
> +	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> +	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> +}
> +
> +static int __init st_clksrc_init(void)
> +{
> +	unsigned long rate;
> +	int ret;
> +
> +	st_clksrc_reset();
> +
> +	rate = clk_get_rate(ddata.clk);
> +
> +	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> +				    "clksrc-st-lpc", rate, 300, 32,
> +				    clocksource_mmio_readl_up);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int st_clksrc_setup_clk(struct device_node *np)
> +{
> +	struct clk *clk;
> +	int ret;
> +
> +	clk = of_clk_get(np, 0);
> +	if (IS_ERR(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> +		ret = PTR_ERR(clk);
> +		return ret;

return PTR_ERR(clk);

so you can get rid of the 'int ret' variable.

> +	}
> +
> +	if (clk_prepare_enable(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> +		return -EINVAL;
> +	}
> +
> +	if (!clk_get_rate(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> +		clk_disable_unprepare(clk);
> +		return -EINVAL;
> +	}
> +
> +	ddata.clk = clk;
> +
> +	return 0;
> +}
> +
> +static void __init st_clksrc_of_register(struct device_node *np)
> +{
> +	int ret;
> +	uint32_t mode;
> +
> +	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> +		return;
> +	}
> +
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> +	if (mode != ST_LPC_MODE_CLKSRC)
> +		return;

I am confused with this patch description + comment and the patch 1's 
description.

For the former, I understand the LPC could be in RTC or WDT mode and 
used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter I 
understand there are three modes clocksource, rtc and watchdog (mutually 
exclusive). Could you clarify ?

> +
> +	ddata.base = of_iomap(np, 0);
> +	if (!ddata.base) {
> +		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> +		return;
> +	}
> +
> +	if (st_clksrc_setup_clk(np)) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	if (st_clksrc_init()) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> +		clk_get_rate(ddata.clk));
> +}
> +CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
>


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[rtc-linux] Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Daniel Lezcano]

On 05/07/2015 03:38 PM, Lee Jones wrote:
> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.
>
> The ST LPC Clocksource IP can be used as the system (tick) timer.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>   drivers/clocksource/Kconfig         |   8 +++
>   drivers/clocksource/Makefile        |   1 +
>   drivers/clocksource/clksrc_st_lpc.c | 123 +++++++++++++++++++++++++++++=
+++++++
>   3 files changed, 132 insertions(+)
>   create mode 100644 drivers/clocksource/clksrc_st_lpc.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 68161f7..ac424cf 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -250,4 +250,12 @@ config CLKSRC_PXA
>   	help
>   	  This enables OST0 support available on PXA and SA-11x0
>   	  platforms.
> +
> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI
> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.
>   endmenu
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 752d5c7..e08da4d 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+=3D timer-integrator-=
ap.o
>   obj-$(CONFIG_CLKSRC_VERSATILE)		+=3D versatile.o
>   obj-$(CONFIG_CLKSRC_MIPS_GIC)		+=3D mips-gic-timer.o
>   obj-$(CONFIG_ASM9260_TIMER)		+=3D asm9260_timer.o
> +obj-$(CONFIG_CLKSRC_ST_LPC)		+=3D clksrc_st_lpc.o
> diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/cl=
ksrc_st_lpc.c
> new file mode 100644
> index 0000000..18a7dcd0
> --- /dev/null
> +++ b/drivers/clocksource/clksrc_st_lpc.c
> @@ -0,0 +1,123 @@
> +/*
> + * Clocksource using the Low Power Timer found in the Low Power Controll=
er (LPC)
> + *
> + * Copyright (C) 2015 STMicroelectronics =E2=80=93 All Rights Reserved
> + *
> + * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> + *	      Ajit Pal Singh <ajitpal.singh@st.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clocksource.h>
> +#include <linux/init.h>
> +#include <linux/of_address.h>
> +#include <linux/slab.h>
> +
> +#include <dt-bindings/mfd/st-lpc.h>
> +
> +/* Low Power Timer */
> +#define LPC_LPT_LSB_OFF		0x400
> +#define LPC_LPT_MSB_OFF		0x404
> +#define LPC_LPT_START_OFF	0x408
> +
> +static struct st_clksrc_ddata {
> +	struct clk		*clk;
> +	void __iomem		*base;
> +} ddata;
> +
> +static void st_clksrc_reset(void)
> +{
> +	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> +	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> +}
> +
> +static int __init st_clksrc_init(void)
> +{
> +	unsigned long rate;
> +	int ret;
> +
> +	st_clksrc_reset();
> +
> +	rate =3D clk_get_rate(ddata.clk);
> +
> +	ret =3D clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> +				    "clksrc-st-lpc", rate, 300, 32,
> +				    clocksource_mmio_readl_up);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int st_clksrc_setup_clk(struct device_node *np)
> +{
> +	struct clk *clk;
> +	int ret;
> +
> +	clk =3D of_clk_get(np, 0);
> +	if (IS_ERR(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> +		ret =3D PTR_ERR(clk);
> +		return ret;

return PTR_ERR(clk);

so you can get rid of the 'int ret' variable.

> +	}
> +
> +	if (clk_prepare_enable(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> +		return -EINVAL;
> +	}
> +
> +	if (!clk_get_rate(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> +		clk_disable_unprepare(clk);
> +		return -EINVAL;
> +	}
> +
> +	ddata.clk =3D clk;
> +
> +	return 0;
> +}
> +
> +static void __init st_clksrc_of_register(struct device_node *np)
> +{
> +	int ret;
> +	uint32_t mode;
> +
> +	ret =3D of_property_read_u32(np, "st,lpc-mode", &mode);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> +		return;
> +	}
> +
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> +	if (mode !=3D ST_LPC_MODE_CLKSRC)
> +		return;

I am confused with this patch description + comment and the patch 1's=20
description.

For the former, I understand the LPC could be in RTC or WDT mode and=20
used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter I=20
understand there are three modes clocksource, rtc and watchdog (mutually=20
exclusive). Could you clarify ?

> +
> +	ddata.base =3D of_iomap(np, 0);
> +	if (!ddata.base) {
> +		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> +		return;
> +	}
> +
> +	if (st_clksrc_setup_clk(np)) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	if (st_clksrc_init()) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> +		clk_get_rate(ddata.clk));
> +}
> +CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
>


--=20
  <http://www.linaro.org/> Linaro.org =E2=94=82 Open source software for AR=
M SoCs

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--=20
--=20
You received this message because you are subscribed to "rtc-linux".
Membership options at http://groups.google.com/group/rtc-linux .
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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Daniel Lezcano]

On 05/07/2015 03:38 PM, Lee Jones wrote:
> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.
>
> The ST LPC Clocksource IP can be used as the system (tick) timer.
>
> Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> ---
>   drivers/clocksource/Kconfig         |   8 +++
>   drivers/clocksource/Makefile        |   1 +
>   drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
>   3 files changed, 132 insertions(+)
>   create mode 100644 drivers/clocksource/clksrc_st_lpc.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 68161f7..ac424cf 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -250,4 +250,12 @@ config CLKSRC_PXA
>   	help
>   	  This enables OST0 support available on PXA and SA-11x0
>   	  platforms.
> +
> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI
> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.
>   endmenu
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 752d5c7..e08da4d 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
>   obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
>   obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
>   obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> +obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> new file mode 100644
> index 0000000..18a7dcd0
> --- /dev/null
> +++ b/drivers/clocksource/clksrc_st_lpc.c
> @@ -0,0 +1,123 @@
> +/*
> + * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> + *
> + * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
> + *
> + * Author(s): Francesco Virlinzi <francesco.virlinzi-qxv4g6HH51o@public.gmane.org>
> + *	      Ajit Pal Singh <ajitpal.singh-qxv4g6HH51o@public.gmane.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clocksource.h>
> +#include <linux/init.h>
> +#include <linux/of_address.h>
> +#include <linux/slab.h>
> +
> +#include <dt-bindings/mfd/st-lpc.h>
> +
> +/* Low Power Timer */
> +#define LPC_LPT_LSB_OFF		0x400
> +#define LPC_LPT_MSB_OFF		0x404
> +#define LPC_LPT_START_OFF	0x408
> +
> +static struct st_clksrc_ddata {
> +	struct clk		*clk;
> +	void __iomem		*base;
> +} ddata;
> +
> +static void st_clksrc_reset(void)
> +{
> +	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> +	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> +}
> +
> +static int __init st_clksrc_init(void)
> +{
> +	unsigned long rate;
> +	int ret;
> +
> +	st_clksrc_reset();
> +
> +	rate = clk_get_rate(ddata.clk);
> +
> +	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> +				    "clksrc-st-lpc", rate, 300, 32,
> +				    clocksource_mmio_readl_up);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int st_clksrc_setup_clk(struct device_node *np)
> +{
> +	struct clk *clk;
> +	int ret;
> +
> +	clk = of_clk_get(np, 0);
> +	if (IS_ERR(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> +		ret = PTR_ERR(clk);
> +		return ret;

return PTR_ERR(clk);

so you can get rid of the 'int ret' variable.

> +	}
> +
> +	if (clk_prepare_enable(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> +		return -EINVAL;
> +	}
> +
> +	if (!clk_get_rate(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> +		clk_disable_unprepare(clk);
> +		return -EINVAL;
> +	}
> +
> +	ddata.clk = clk;
> +
> +	return 0;
> +}
> +
> +static void __init st_clksrc_of_register(struct device_node *np)
> +{
> +	int ret;
> +	uint32_t mode;
> +
> +	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> +		return;
> +	}
> +
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> +	if (mode != ST_LPC_MODE_CLKSRC)
> +		return;

I am confused with this patch description + comment and the patch 1's 
description.

For the former, I understand the LPC could be in RTC or WDT mode and 
used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter I 
understand there are three modes clocksource, rtc and watchdog (mutually 
exclusive). Could you clarify ?

> +
> +	ddata.base = of_iomap(np, 0);
> +	if (!ddata.base) {
> +		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> +		return;
> +	}
> +
> +	if (st_clksrc_setup_clk(np)) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	if (st_clksrc_init()) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> +		clk_get_rate(ddata.clk));
> +}
> +CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
>


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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Daniel Lezcano]

On 05/07/2015 03:38 PM, Lee Jones wrote:
> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.
>
> The ST LPC Clocksource IP can be used as the system (tick) timer.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>   drivers/clocksource/Kconfig         |   8 +++
>   drivers/clocksource/Makefile        |   1 +
>   drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
>   3 files changed, 132 insertions(+)
>   create mode 100644 drivers/clocksource/clksrc_st_lpc.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 68161f7..ac424cf 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -250,4 +250,12 @@ config CLKSRC_PXA
>   	help
>   	  This enables OST0 support available on PXA and SA-11x0
>   	  platforms.
> +
> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI
> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.
>   endmenu
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 752d5c7..e08da4d 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
>   obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
>   obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
>   obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> +obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> new file mode 100644
> index 0000000..18a7dcd0
> --- /dev/null
> +++ b/drivers/clocksource/clksrc_st_lpc.c
> @@ -0,0 +1,123 @@
> +/*
> + * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> + *
> + * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
> + *
> + * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> + *	      Ajit Pal Singh <ajitpal.singh@st.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clocksource.h>
> +#include <linux/init.h>
> +#include <linux/of_address.h>
> +#include <linux/slab.h>
> +
> +#include <dt-bindings/mfd/st-lpc.h>
> +
> +/* Low Power Timer */
> +#define LPC_LPT_LSB_OFF		0x400
> +#define LPC_LPT_MSB_OFF		0x404
> +#define LPC_LPT_START_OFF	0x408
> +
> +static struct st_clksrc_ddata {
> +	struct clk		*clk;
> +	void __iomem		*base;
> +} ddata;
> +
> +static void st_clksrc_reset(void)
> +{
> +	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> +	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> +}
> +
> +static int __init st_clksrc_init(void)
> +{
> +	unsigned long rate;
> +	int ret;
> +
> +	st_clksrc_reset();
> +
> +	rate = clk_get_rate(ddata.clk);
> +
> +	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> +				    "clksrc-st-lpc", rate, 300, 32,
> +				    clocksource_mmio_readl_up);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int st_clksrc_setup_clk(struct device_node *np)
> +{
> +	struct clk *clk;
> +	int ret;
> +
> +	clk = of_clk_get(np, 0);
> +	if (IS_ERR(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> +		ret = PTR_ERR(clk);
> +		return ret;

return PTR_ERR(clk);

so you can get rid of the 'int ret' variable.

> +	}
> +
> +	if (clk_prepare_enable(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> +		return -EINVAL;
> +	}
> +
> +	if (!clk_get_rate(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> +		clk_disable_unprepare(clk);
> +		return -EINVAL;
> +	}
> +
> +	ddata.clk = clk;
> +
> +	return 0;
> +}
> +
> +static void __init st_clksrc_of_register(struct device_node *np)
> +{
> +	int ret;
> +	uint32_t mode;
> +
> +	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> +		return;
> +	}
> +
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> +	if (mode != ST_LPC_MODE_CLKSRC)
> +		return;

I am confused with this patch description + comment and the patch 1's 
description.

For the former, I understand the LPC could be in RTC or WDT mode and 
used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter I 
understand there are three modes clocksource, rtc and watchdog (mutually 
exclusive). Could you clarify ?

> +
> +	ddata.base = of_iomap(np, 0);
> +	if (!ddata.base) {
> +		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> +		return;
> +	}
> +
> +	if (st_clksrc_setup_clk(np)) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	if (st_clksrc_init()) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> +		clk_get_rate(ddata.clk));
> +}
> +CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
>


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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Daniel Lezcano]

On 05/07/2015 03:38 PM, Lee Jones wrote:
> This IP is shared with Watchdog and RTC functionality.  Only one of
> these IPs can be used at the same time.  We use the device-driver
> model combined with a DT 'mode' property to enforce this.
>
> The ST LPC Clocksource IP can be used as the system (tick) timer.
>
> Signed-off-by: Lee Jones <lee.jones@linaro.org>
> ---
>   drivers/clocksource/Kconfig         |   8 +++
>   drivers/clocksource/Makefile        |   1 +
>   drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
>   3 files changed, 132 insertions(+)
>   create mode 100644 drivers/clocksource/clksrc_st_lpc.c
>
> diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> index 68161f7..ac424cf 100644
> --- a/drivers/clocksource/Kconfig
> +++ b/drivers/clocksource/Kconfig
> @@ -250,4 +250,12 @@ config CLKSRC_PXA
>   	help
>   	  This enables OST0 support available on PXA and SA-11x0
>   	  platforms.
> +
> +config CLKSRC_ST_LPC
> +	bool
> +	depends on ARCH_STI
> +	select CLKSRC_OF if OF
> +	help
> +	  Enable this option to use the Low Power controller timer
> +	  as clocksource.
>   endmenu
> diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> index 752d5c7..e08da4d 100644
> --- a/drivers/clocksource/Makefile
> +++ b/drivers/clocksource/Makefile
> @@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
>   obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
>   obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
>   obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> +obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> new file mode 100644
> index 0000000..18a7dcd0
> --- /dev/null
> +++ b/drivers/clocksource/clksrc_st_lpc.c
> @@ -0,0 +1,123 @@
> +/*
> + * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> + *
> + * Copyright (C) 2015 STMicroelectronics ? All Rights Reserved
> + *
> + * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> + *	      Ajit Pal Singh <ajitpal.singh@st.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clocksource.h>
> +#include <linux/init.h>
> +#include <linux/of_address.h>
> +#include <linux/slab.h>
> +
> +#include <dt-bindings/mfd/st-lpc.h>
> +
> +/* Low Power Timer */
> +#define LPC_LPT_LSB_OFF		0x400
> +#define LPC_LPT_MSB_OFF		0x404
> +#define LPC_LPT_START_OFF	0x408
> +
> +static struct st_clksrc_ddata {
> +	struct clk		*clk;
> +	void __iomem		*base;
> +} ddata;
> +
> +static void st_clksrc_reset(void)
> +{
> +	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> +	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> +	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> +}
> +
> +static int __init st_clksrc_init(void)
> +{
> +	unsigned long rate;
> +	int ret;
> +
> +	st_clksrc_reset();
> +
> +	rate = clk_get_rate(ddata.clk);
> +
> +	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> +				    "clksrc-st-lpc", rate, 300, 32,
> +				    clocksource_mmio_readl_up);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> +		return ret;
> +	}
> +
> +	return 0;
> +}
> +
> +static int st_clksrc_setup_clk(struct device_node *np)
> +{
> +	struct clk *clk;
> +	int ret;
> +
> +	clk = of_clk_get(np, 0);
> +	if (IS_ERR(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> +		ret = PTR_ERR(clk);
> +		return ret;

return PTR_ERR(clk);

so you can get rid of the 'int ret' variable.

> +	}
> +
> +	if (clk_prepare_enable(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> +		return -EINVAL;
> +	}
> +
> +	if (!clk_get_rate(clk)) {
> +		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> +		clk_disable_unprepare(clk);
> +		return -EINVAL;
> +	}
> +
> +	ddata.clk = clk;
> +
> +	return 0;
> +}
> +
> +static void __init st_clksrc_of_register(struct device_node *np)
> +{
> +	int ret;
> +	uint32_t mode;
> +
> +	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> +	if (ret) {
> +		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> +		return;
> +	}
> +
> +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> +	if (mode != ST_LPC_MODE_CLKSRC)
> +		return;

I am confused with this patch description + comment and the patch 1's 
description.

For the former, I understand the LPC could be in RTC or WDT mode and 
used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter I 
understand there are three modes clocksource, rtc and watchdog (mutually 
exclusive). Could you clarify ?

> +
> +	ddata.base = of_iomap(np, 0);
> +	if (!ddata.base) {
> +		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> +		return;
> +	}
> +
> +	if (st_clksrc_setup_clk(np)) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	if (st_clksrc_init()) {
> +		iounmap(ddata.base);
> +		return;
> +	}
> +
> +	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> +		clk_get_rate(ddata.clk));
> +}
> +CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
>


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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Daniel Lezcano]

On 05/08/2015 01:47 PM, Paul Bolle wrote:
> On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
>> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
>>
>> I can add a menu option, no problem.
>
> It's not just menuconfig:
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>      $ vim .config
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      # CONFIG_CLKSRC_ST_LPC is not set
>      # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
>      $ make ARCH=arm silentoldconfig
>      scripts/kconfig/conf  --silentoldconfig Kconfig
>      #
>      # configuration written to .config
>      #
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>
> So I think that, if you want to be able to set
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
> you need to add a prompt. Or have you found a way around this?

The general policy is to have non-prompted options in the clocksource's 
Kconfig and let the platform's config to select the right components.


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[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Daniel Lezcano]

On 05/08/2015 01:47 PM, Paul Bolle wrote:
> On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
>> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
>>
>> I can add a menu option, no problem.
>
> It's not just menuconfig:
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=3Dy
>      CONFIG_CLKSRC_ST_LPC=3Dy
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=3Dy
>      $ vim .config
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=3Dy
>      # CONFIG_CLKSRC_ST_LPC is not set
>      # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
>      $ make ARCH=3Darm silentoldconfig
>      scripts/kconfig/conf  --silentoldconfig Kconfig
>      #
>      # configuration written to .config
>      #
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=3Dy
>      CONFIG_CLKSRC_ST_LPC=3Dy
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=3Dy
>
> So I think that, if you want to be able to set
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
> you need to add a prompt. Or have you found a way around this?

The general policy is to have non-prompted options in the clocksource's=20
Kconfig and let the platform's config to select the right components.


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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Daniel Lezcano]

On 05/08/2015 01:47 PM, Paul Bolle wrote:
> On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
>> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
>>
>> I can add a menu option, no problem.
>
> It's not just menuconfig:
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>      $ vim .config
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      # CONFIG_CLKSRC_ST_LPC is not set
>      # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
>      $ make ARCH=arm silentoldconfig
>      scripts/kconfig/conf  --silentoldconfig Kconfig
>      #
>      # configuration written to .config
>      #
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>
> So I think that, if you want to be able to set
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
> you need to add a prompt. Or have you found a way around this?

The general policy is to have non-prompted options in the clocksource's 
Kconfig and let the platform's config to select the right components.


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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Daniel Lezcano]

On 05/08/2015 01:47 PM, Paul Bolle wrote:
> On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
>> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
>>
>> I can add a menu option, no problem.
>
> It's not just menuconfig:
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>      $ vim .config
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      # CONFIG_CLKSRC_ST_LPC is not set
>      # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
>      $ make ARCH=arm silentoldconfig
>      scripts/kconfig/conf  --silentoldconfig Kconfig
>      #
>      # configuration written to .config
>      #
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>
> So I think that, if you want to be able to set
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
> you need to add a prompt. Or have you found a way around this?

The general policy is to have non-prompted options in the clocksource's 
Kconfig and let the platform's config to select the right components.


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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Daniel Lezcano]

On 05/08/2015 01:47 PM, Paul Bolle wrote:
> On Fri, 2015-05-08 at 11:29 +0100, Lee Jones wrote:
>> Ah, you mean from menuconfig.  I almost forgot what that was. ;)
>>
>> I can add a menu option, no problem.
>
> It's not just menuconfig:
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>      $ vim .config
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      # CONFIG_CLKSRC_ST_LPC is not set
>      # CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK is not set
>      $ make ARCH=arm silentoldconfig
>      scripts/kconfig/conf  --silentoldconfig Kconfig
>      #
>      # configuration written to .config
>      #
>      $ grep -e CONFIG_ARCH_STI -e CONFIG_CLKSRC_ST_LPC .config
>      CONFIG_ARCH_STI=y
>      CONFIG_CLKSRC_ST_LPC=y
>      CONFIG_CLKSRC_ST_LPC_TIMER_SCHED_CLOCK=y
>
> So I think that, if you want to be able to set
> CLKSRC_ST_LPC_TIMER_SCHED_CLOCK to 'n' even though CLKSRC_ST_LPC is 'y',
> you need to add a prompt. Or have you found a way around this?

The general policy is to have non-prompted options in the clocksource's 
Kconfig and let the platform's config to select the right components.


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Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Mon, 2015-05-11 at 10:47 +0200, Daniel Lezcano wrote:
> The general policy is to have non-prompted options in the clocksource's 
> Kconfig and let the platform's config to select the right components.

If you want to stick to that policy here there's no reason to add
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK in this patch. It currently adds
nothing, as it will always be equal to whatever value CLKSRC_ST_LPC will
have, right?


Paul Bolle

[rtc-linux] Re: [PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Mon, 2015-05-11 at 10:47 +0200, Daniel Lezcano wrote:
> The general policy is to have non-prompted options in the clocksource's 
> Kconfig and let the platform's config to select the right components.

If you want to stick to that policy here there's no reason to add
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK in this patch. It currently adds
nothing, as it will always be equal to whatever value CLKSRC_ST_LPC will
have, right?


Paul Bolle

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[PATCH 03/12] clocksource: sti: Provide 'use timer as sched clock' capability

[Paul Bolle]

On Mon, 2015-05-11 at 10:47 +0200, Daniel Lezcano wrote:
> The general policy is to have non-prompted options in the clocksource's 
> Kconfig and let the platform's config to select the right components.

If you want to stick to that policy here there's no reason to add
CLKSRC_ST_LPC_TIMER_SCHED_CLOCK in this patch. It currently adds
nothing, as it will always be equal to whatever value CLKSRC_ST_LPC will
have, right?


Paul Bolle

Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Mon, 11 May 2015, Daniel Lezcano wrote:

> On 05/07/2015 03:38 PM, Lee Jones wrote:
> >This IP is shared with Watchdog and RTC functionality.  Only one of
> >these IPs can be used at the same time.  We use the device-driver
> >model combined with a DT 'mode' property to enforce this.
> >
> >The ST LPC Clocksource IP can be used as the system (tick) timer.
> >
> >Signed-off-by: Lee Jones <lee.jones@linaro.org>
> >---
> >  drivers/clocksource/Kconfig         |   8 +++
> >  drivers/clocksource/Makefile        |   1 +
> >  drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 132 insertions(+)
> >  create mode 100644 drivers/clocksource/clksrc_st_lpc.c
> >
> >diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> >index 68161f7..ac424cf 100644
> >--- a/drivers/clocksource/Kconfig
> >+++ b/drivers/clocksource/Kconfig
> >@@ -250,4 +250,12 @@ config CLKSRC_PXA
> >  	help
> >  	  This enables OST0 support available on PXA and SA-11x0
> >  	  platforms.
> >+
> >+config CLKSRC_ST_LPC
> >+	bool
> >+	depends on ARCH_STI
> >+	select CLKSRC_OF if OF
> >+	help
> >+	  Enable this option to use the Low Power controller timer
> >+	  as clocksource.
> >  endmenu
> >diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> >index 752d5c7..e08da4d 100644
> >--- a/drivers/clocksource/Makefile
> >+++ b/drivers/clocksource/Makefile
> >@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
> >  obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
> >  obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
> >  obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> >+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> >diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> >new file mode 100644
> >index 0000000..18a7dcd0
> >--- /dev/null
> >+++ b/drivers/clocksource/clksrc_st_lpc.c
> >@@ -0,0 +1,123 @@
> >+/*
> >+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> >+ *
> >+ * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
> >+ *
> >+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> >+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
> >+ *
> >+ * This program is free software; you can redistribute it and/or modify
> >+ * it under the terms of the GNU General Public License as published by
> >+ * the Free Software Foundation; either version 2 of the License, or
> >+ * (at your option) any later version.
> >+ */
> >+
> >+#include <linux/clk.h>
> >+#include <linux/clocksource.h>
> >+#include <linux/init.h>
> >+#include <linux/of_address.h>
> >+#include <linux/slab.h>
> >+
> >+#include <dt-bindings/mfd/st-lpc.h>
> >+
> >+/* Low Power Timer */
> >+#define LPC_LPT_LSB_OFF		0x400
> >+#define LPC_LPT_MSB_OFF		0x404
> >+#define LPC_LPT_START_OFF	0x408
> >+
> >+static struct st_clksrc_ddata {
> >+	struct clk		*clk;
> >+	void __iomem		*base;
> >+} ddata;
> >+
> >+static void st_clksrc_reset(void)
> >+{
> >+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> >+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> >+}
> >+
> >+static int __init st_clksrc_init(void)
> >+{
> >+	unsigned long rate;
> >+	int ret;
> >+
> >+	st_clksrc_reset();
> >+
> >+	rate = clk_get_rate(ddata.clk);
> >+
> >+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> >+				    "clksrc-st-lpc", rate, 300, 32,
> >+				    clocksource_mmio_readl_up);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> >+		return ret;
> >+	}
> >+
> >+	return 0;
> >+}
> >+
> >+static int st_clksrc_setup_clk(struct device_node *np)
> >+{
> >+	struct clk *clk;
> >+	int ret;
> >+
> >+	clk = of_clk_get(np, 0);
> >+	if (IS_ERR(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> >+		ret = PTR_ERR(clk);
> >+		return ret;
> 
> return PTR_ERR(clk);
> 
> so you can get rid of the 'int ret' variable.

Absolutely.  Good spot.

> >+	}
> >+
> >+	if (clk_prepare_enable(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> >+		return -EINVAL;
> >+	}
> >+
> >+	if (!clk_get_rate(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> >+		clk_disable_unprepare(clk);
> >+		return -EINVAL;
> >+	}
> >+
> >+	ddata.clk = clk;
> >+
> >+	return 0;
> >+}
> >+
> >+static void __init st_clksrc_of_register(struct device_node *np)
> >+{
> >+	int ret;
> >+	uint32_t mode;
> >+
> >+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> >+		return;
> >+	}
> >+
> >+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >+	if (mode != ST_LPC_MODE_CLKSRC)
> >+		return;
> 
> I am confused with this patch description + comment and the patch
> 1's description.
> 
> For the former, I understand the LPC could be in RTC or WDT mode and
> used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter
> I understand there are three modes clocksource, rtc and watchdog
> (mutually exclusive). Could you clarify ?

They are all mutually exclusive.  I will fix-up the commit log to
re-enforce this.

> >+
> >+	ddata.base = of_iomap(np, 0);
> >+	if (!ddata.base) {
> >+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_setup_clk(np)) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_init()) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> >+		clk_get_rate(ddata.clk));
> >+}
> >+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
> >
> 
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

[rtc-linux] Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Mon, 11 May 2015, Daniel Lezcano wrote:

> On 05/07/2015 03:38 PM, Lee Jones wrote:
> >This IP is shared with Watchdog and RTC functionality.  Only one of
> >these IPs can be used at the same time.  We use the device-driver
> >model combined with a DT 'mode' property to enforce this.
> >
> >The ST LPC Clocksource IP can be used as the system (tick) timer.
> >
> >Signed-off-by: Lee Jones <lee.jones@linaro.org>
> >---
> >  drivers/clocksource/Kconfig         |   8 +++
> >  drivers/clocksource/Makefile        |   1 +
> >  drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++=
++++++++
> >  3 files changed, 132 insertions(+)
> >  create mode 100644 drivers/clocksource/clksrc_st_lpc.c
> >
> >diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> >index 68161f7..ac424cf 100644
> >--- a/drivers/clocksource/Kconfig
> >+++ b/drivers/clocksource/Kconfig
> >@@ -250,4 +250,12 @@ config CLKSRC_PXA
> >  	help
> >  	  This enables OST0 support available on PXA and SA-11x0
> >  	  platforms.
> >+
> >+config CLKSRC_ST_LPC
> >+	bool
> >+	depends on ARCH_STI
> >+	select CLKSRC_OF if OF
> >+	help
> >+	  Enable this option to use the Low Power controller timer
> >+	  as clocksource.
> >  endmenu
> >diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> >index 752d5c7..e08da4d 100644
> >--- a/drivers/clocksource/Makefile
> >+++ b/drivers/clocksource/Makefile
> >@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+=3D timer-integrator=
-ap.o
> >  obj-$(CONFIG_CLKSRC_VERSATILE)		+=3D versatile.o
> >  obj-$(CONFIG_CLKSRC_MIPS_GIC)		+=3D mips-gic-timer.o
> >  obj-$(CONFIG_ASM9260_TIMER)		+=3D asm9260_timer.o
> >+obj-$(CONFIG_CLKSRC_ST_LPC)		+=3D clksrc_st_lpc.o
> >diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/c=
lksrc_st_lpc.c
> >new file mode 100644
> >index 0000000..18a7dcd0
> >--- /dev/null
> >+++ b/drivers/clocksource/clksrc_st_lpc.c
> >@@ -0,0 +1,123 @@
> >+/*
> >+ * Clocksource using the Low Power Timer found in the Low Power Control=
ler (LPC)
> >+ *
> >+ * Copyright (C) 2015 STMicroelectronics =E2=80=93 All Rights Reserved
> >+ *
> >+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> >+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
> >+ *
> >+ * This program is free software; you can redistribute it and/or modify
> >+ * it under the terms of the GNU General Public License as published by
> >+ * the Free Software Foundation; either version 2 of the License, or
> >+ * (at your option) any later version.
> >+ */
> >+
> >+#include <linux/clk.h>
> >+#include <linux/clocksource.h>
> >+#include <linux/init.h>
> >+#include <linux/of_address.h>
> >+#include <linux/slab.h>
> >+
> >+#include <dt-bindings/mfd/st-lpc.h>
> >+
> >+/* Low Power Timer */
> >+#define LPC_LPT_LSB_OFF		0x400
> >+#define LPC_LPT_MSB_OFF		0x404
> >+#define LPC_LPT_START_OFF	0x408
> >+
> >+static struct st_clksrc_ddata {
> >+	struct clk		*clk;
> >+	void __iomem		*base;
> >+} ddata;
> >+
> >+static void st_clksrc_reset(void)
> >+{
> >+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> >+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> >+}
> >+
> >+static int __init st_clksrc_init(void)
> >+{
> >+	unsigned long rate;
> >+	int ret;
> >+
> >+	st_clksrc_reset();
> >+
> >+	rate =3D clk_get_rate(ddata.clk);
> >+
> >+	ret =3D clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> >+				    "clksrc-st-lpc", rate, 300, 32,
> >+				    clocksource_mmio_readl_up);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> >+		return ret;
> >+	}
> >+
> >+	return 0;
> >+}
> >+
> >+static int st_clksrc_setup_clk(struct device_node *np)
> >+{
> >+	struct clk *clk;
> >+	int ret;
> >+
> >+	clk =3D of_clk_get(np, 0);
> >+	if (IS_ERR(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> >+		ret =3D PTR_ERR(clk);
> >+		return ret;
>=20
> return PTR_ERR(clk);
>=20
> so you can get rid of the 'int ret' variable.

Absolutely.  Good spot.

> >+	}
> >+
> >+	if (clk_prepare_enable(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> >+		return -EINVAL;
> >+	}
> >+
> >+	if (!clk_get_rate(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> >+		clk_disable_unprepare(clk);
> >+		return -EINVAL;
> >+	}
> >+
> >+	ddata.clk =3D clk;
> >+
> >+	return 0;
> >+}
> >+
> >+static void __init st_clksrc_of_register(struct device_node *np)
> >+{
> >+	int ret;
> >+	uint32_t mode;
> >+
> >+	ret =3D of_property_read_u32(np, "st,lpc-mode", &mode);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> >+		return;
> >+	}
> >+
> >+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >+	if (mode !=3D ST_LPC_MODE_CLKSRC)
> >+		return;
>=20
> I am confused with this patch description + comment and the patch
> 1's description.
>=20
> For the former, I understand the LPC could be in RTC or WDT mode and
> used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter
> I understand there are three modes clocksource, rtc and watchdog
> (mutually exclusive). Could you clarify ?

They are all mutually exclusive.  I will fix-up the commit log to
re-enforce this.

> >+
> >+	ddata.base =3D of_iomap(np, 0);
> >+	if (!ddata.base) {
> >+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_setup_clk(np)) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_init()) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> >+		clk_get_rate(ddata.clk));
> >+}
> >+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
> >
>=20
>=20

--=20
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org =E2=94=82 Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

--=20
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---=20
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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Mon, 11 May 2015, Daniel Lezcano wrote:

> On 05/07/2015 03:38 PM, Lee Jones wrote:
> >This IP is shared with Watchdog and RTC functionality.  Only one of
> >these IPs can be used at the same time.  We use the device-driver
> >model combined with a DT 'mode' property to enforce this.
> >
> >The ST LPC Clocksource IP can be used as the system (tick) timer.
> >
> >Signed-off-by: Lee Jones <lee.jones-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> >---
> >  drivers/clocksource/Kconfig         |   8 +++
> >  drivers/clocksource/Makefile        |   1 +
> >  drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 132 insertions(+)
> >  create mode 100644 drivers/clocksource/clksrc_st_lpc.c
> >
> >diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> >index 68161f7..ac424cf 100644
> >--- a/drivers/clocksource/Kconfig
> >+++ b/drivers/clocksource/Kconfig
> >@@ -250,4 +250,12 @@ config CLKSRC_PXA
> >  	help
> >  	  This enables OST0 support available on PXA and SA-11x0
> >  	  platforms.
> >+
> >+config CLKSRC_ST_LPC
> >+	bool
> >+	depends on ARCH_STI
> >+	select CLKSRC_OF if OF
> >+	help
> >+	  Enable this option to use the Low Power controller timer
> >+	  as clocksource.
> >  endmenu
> >diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> >index 752d5c7..e08da4d 100644
> >--- a/drivers/clocksource/Makefile
> >+++ b/drivers/clocksource/Makefile
> >@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
> >  obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
> >  obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
> >  obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> >+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> >diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> >new file mode 100644
> >index 0000000..18a7dcd0
> >--- /dev/null
> >+++ b/drivers/clocksource/clksrc_st_lpc.c
> >@@ -0,0 +1,123 @@
> >+/*
> >+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> >+ *
> >+ * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
> >+ *
> >+ * Author(s): Francesco Virlinzi <francesco.virlinzi-qxv4g6HH51o@public.gmane.org>
> >+ *	      Ajit Pal Singh <ajitpal.singh-qxv4g6HH51o@public.gmane.org>
> >+ *
> >+ * This program is free software; you can redistribute it and/or modify
> >+ * it under the terms of the GNU General Public License as published by
> >+ * the Free Software Foundation; either version 2 of the License, or
> >+ * (at your option) any later version.
> >+ */
> >+
> >+#include <linux/clk.h>
> >+#include <linux/clocksource.h>
> >+#include <linux/init.h>
> >+#include <linux/of_address.h>
> >+#include <linux/slab.h>
> >+
> >+#include <dt-bindings/mfd/st-lpc.h>
> >+
> >+/* Low Power Timer */
> >+#define LPC_LPT_LSB_OFF		0x400
> >+#define LPC_LPT_MSB_OFF		0x404
> >+#define LPC_LPT_START_OFF	0x408
> >+
> >+static struct st_clksrc_ddata {
> >+	struct clk		*clk;
> >+	void __iomem		*base;
> >+} ddata;
> >+
> >+static void st_clksrc_reset(void)
> >+{
> >+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> >+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> >+}
> >+
> >+static int __init st_clksrc_init(void)
> >+{
> >+	unsigned long rate;
> >+	int ret;
> >+
> >+	st_clksrc_reset();
> >+
> >+	rate = clk_get_rate(ddata.clk);
> >+
> >+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> >+				    "clksrc-st-lpc", rate, 300, 32,
> >+				    clocksource_mmio_readl_up);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> >+		return ret;
> >+	}
> >+
> >+	return 0;
> >+}
> >+
> >+static int st_clksrc_setup_clk(struct device_node *np)
> >+{
> >+	struct clk *clk;
> >+	int ret;
> >+
> >+	clk = of_clk_get(np, 0);
> >+	if (IS_ERR(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> >+		ret = PTR_ERR(clk);
> >+		return ret;
> 
> return PTR_ERR(clk);
> 
> so you can get rid of the 'int ret' variable.

Absolutely.  Good spot.

> >+	}
> >+
> >+	if (clk_prepare_enable(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> >+		return -EINVAL;
> >+	}
> >+
> >+	if (!clk_get_rate(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> >+		clk_disable_unprepare(clk);
> >+		return -EINVAL;
> >+	}
> >+
> >+	ddata.clk = clk;
> >+
> >+	return 0;
> >+}
> >+
> >+static void __init st_clksrc_of_register(struct device_node *np)
> >+{
> >+	int ret;
> >+	uint32_t mode;
> >+
> >+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> >+		return;
> >+	}
> >+
> >+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >+	if (mode != ST_LPC_MODE_CLKSRC)
> >+		return;
> 
> I am confused with this patch description + comment and the patch
> 1's description.
> 
> For the former, I understand the LPC could be in RTC or WDT mode and
> used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter
> I understand there are three modes clocksource, rtc and watchdog
> (mutually exclusive). Could you clarify ?

They are all mutually exclusive.  I will fix-up the commit log to
re-enforce this.

> >+
> >+	ddata.base = of_iomap(np, 0);
> >+	if (!ddata.base) {
> >+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_setup_clk(np)) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_init()) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> >+		clk_get_rate(ddata.clk));
> >+}
> >+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
> >
> 
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Mon, 11 May 2015, Daniel Lezcano wrote:

> On 05/07/2015 03:38 PM, Lee Jones wrote:
> >This IP is shared with Watchdog and RTC functionality.  Only one of
> >these IPs can be used at the same time.  We use the device-driver
> >model combined with a DT 'mode' property to enforce this.
> >
> >The ST LPC Clocksource IP can be used as the system (tick) timer.
> >
> >Signed-off-by: Lee Jones <lee.jones@linaro.org>
> >---
> >  drivers/clocksource/Kconfig         |   8 +++
> >  drivers/clocksource/Makefile        |   1 +
> >  drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 132 insertions(+)
> >  create mode 100644 drivers/clocksource/clksrc_st_lpc.c
> >
> >diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> >index 68161f7..ac424cf 100644
> >--- a/drivers/clocksource/Kconfig
> >+++ b/drivers/clocksource/Kconfig
> >@@ -250,4 +250,12 @@ config CLKSRC_PXA
> >  	help
> >  	  This enables OST0 support available on PXA and SA-11x0
> >  	  platforms.
> >+
> >+config CLKSRC_ST_LPC
> >+	bool
> >+	depends on ARCH_STI
> >+	select CLKSRC_OF if OF
> >+	help
> >+	  Enable this option to use the Low Power controller timer
> >+	  as clocksource.
> >  endmenu
> >diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> >index 752d5c7..e08da4d 100644
> >--- a/drivers/clocksource/Makefile
> >+++ b/drivers/clocksource/Makefile
> >@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
> >  obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
> >  obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
> >  obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> >+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> >diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> >new file mode 100644
> >index 0000000..18a7dcd0
> >--- /dev/null
> >+++ b/drivers/clocksource/clksrc_st_lpc.c
> >@@ -0,0 +1,123 @@
> >+/*
> >+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> >+ *
> >+ * Copyright (C) 2015 STMicroelectronics – All Rights Reserved
> >+ *
> >+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> >+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
> >+ *
> >+ * This program is free software; you can redistribute it and/or modify
> >+ * it under the terms of the GNU General Public License as published by
> >+ * the Free Software Foundation; either version 2 of the License, or
> >+ * (at your option) any later version.
> >+ */
> >+
> >+#include <linux/clk.h>
> >+#include <linux/clocksource.h>
> >+#include <linux/init.h>
> >+#include <linux/of_address.h>
> >+#include <linux/slab.h>
> >+
> >+#include <dt-bindings/mfd/st-lpc.h>
> >+
> >+/* Low Power Timer */
> >+#define LPC_LPT_LSB_OFF		0x400
> >+#define LPC_LPT_MSB_OFF		0x404
> >+#define LPC_LPT_START_OFF	0x408
> >+
> >+static struct st_clksrc_ddata {
> >+	struct clk		*clk;
> >+	void __iomem		*base;
> >+} ddata;
> >+
> >+static void st_clksrc_reset(void)
> >+{
> >+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> >+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> >+}
> >+
> >+static int __init st_clksrc_init(void)
> >+{
> >+	unsigned long rate;
> >+	int ret;
> >+
> >+	st_clksrc_reset();
> >+
> >+	rate = clk_get_rate(ddata.clk);
> >+
> >+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> >+				    "clksrc-st-lpc", rate, 300, 32,
> >+				    clocksource_mmio_readl_up);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> >+		return ret;
> >+	}
> >+
> >+	return 0;
> >+}
> >+
> >+static int st_clksrc_setup_clk(struct device_node *np)
> >+{
> >+	struct clk *clk;
> >+	int ret;
> >+
> >+	clk = of_clk_get(np, 0);
> >+	if (IS_ERR(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> >+		ret = PTR_ERR(clk);
> >+		return ret;
> 
> return PTR_ERR(clk);
> 
> so you can get rid of the 'int ret' variable.

Absolutely.  Good spot.

> >+	}
> >+
> >+	if (clk_prepare_enable(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> >+		return -EINVAL;
> >+	}
> >+
> >+	if (!clk_get_rate(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> >+		clk_disable_unprepare(clk);
> >+		return -EINVAL;
> >+	}
> >+
> >+	ddata.clk = clk;
> >+
> >+	return 0;
> >+}
> >+
> >+static void __init st_clksrc_of_register(struct device_node *np)
> >+{
> >+	int ret;
> >+	uint32_t mode;
> >+
> >+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> >+		return;
> >+	}
> >+
> >+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >+	if (mode != ST_LPC_MODE_CLKSRC)
> >+		return;
> 
> I am confused with this patch description + comment and the patch
> 1's description.
> 
> For the former, I understand the LPC could be in RTC or WDT mode and
> used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter
> I understand there are three modes clocksource, rtc and watchdog
> (mutually exclusive). Could you clarify ?

They are all mutually exclusive.  I will fix-up the commit log to
re-enforce this.

> >+
> >+	ddata.base = of_iomap(np, 0);
> >+	if (!ddata.base) {
> >+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_setup_clk(np)) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_init()) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> >+		clk_get_rate(ddata.clk));
> >+}
> >+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
> >
> 
> 

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[PATCH 02/12] clocksource: sti: Provide support for the ST LPC Clocksource IP

[Lee Jones]

On Mon, 11 May 2015, Daniel Lezcano wrote:

> On 05/07/2015 03:38 PM, Lee Jones wrote:
> >This IP is shared with Watchdog and RTC functionality.  Only one of
> >these IPs can be used at the same time.  We use the device-driver
> >model combined with a DT 'mode' property to enforce this.
> >
> >The ST LPC Clocksource IP can be used as the system (tick) timer.
> >
> >Signed-off-by: Lee Jones <lee.jones@linaro.org>
> >---
> >  drivers/clocksource/Kconfig         |   8 +++
> >  drivers/clocksource/Makefile        |   1 +
> >  drivers/clocksource/clksrc_st_lpc.c | 123 ++++++++++++++++++++++++++++++++++++
> >  3 files changed, 132 insertions(+)
> >  create mode 100644 drivers/clocksource/clksrc_st_lpc.c
> >
> >diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
> >index 68161f7..ac424cf 100644
> >--- a/drivers/clocksource/Kconfig
> >+++ b/drivers/clocksource/Kconfig
> >@@ -250,4 +250,12 @@ config CLKSRC_PXA
> >  	help
> >  	  This enables OST0 support available on PXA and SA-11x0
> >  	  platforms.
> >+
> >+config CLKSRC_ST_LPC
> >+	bool
> >+	depends on ARCH_STI
> >+	select CLKSRC_OF if OF
> >+	help
> >+	  Enable this option to use the Low Power controller timer
> >+	  as clocksource.
> >  endmenu
> >diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
> >index 752d5c7..e08da4d 100644
> >--- a/drivers/clocksource/Makefile
> >+++ b/drivers/clocksource/Makefile
> >@@ -51,3 +51,4 @@ obj-$(CONFIG_ARCH_INTEGRATOR_AP)	+= timer-integrator-ap.o
> >  obj-$(CONFIG_CLKSRC_VERSATILE)		+= versatile.o
> >  obj-$(CONFIG_CLKSRC_MIPS_GIC)		+= mips-gic-timer.o
> >  obj-$(CONFIG_ASM9260_TIMER)		+= asm9260_timer.o
> >+obj-$(CONFIG_CLKSRC_ST_LPC)		+= clksrc_st_lpc.o
> >diff --git a/drivers/clocksource/clksrc_st_lpc.c b/drivers/clocksource/clksrc_st_lpc.c
> >new file mode 100644
> >index 0000000..18a7dcd0
> >--- /dev/null
> >+++ b/drivers/clocksource/clksrc_st_lpc.c
> >@@ -0,0 +1,123 @@
> >+/*
> >+ * Clocksource using the Low Power Timer found in the Low Power Controller (LPC)
> >+ *
> >+ * Copyright (C) 2015 STMicroelectronics ? All Rights Reserved
> >+ *
> >+ * Author(s): Francesco Virlinzi <francesco.virlinzi@st.com>
> >+ *	      Ajit Pal Singh <ajitpal.singh@st.com>
> >+ *
> >+ * This program is free software; you can redistribute it and/or modify
> >+ * it under the terms of the GNU General Public License as published by
> >+ * the Free Software Foundation; either version 2 of the License, or
> >+ * (at your option) any later version.
> >+ */
> >+
> >+#include <linux/clk.h>
> >+#include <linux/clocksource.h>
> >+#include <linux/init.h>
> >+#include <linux/of_address.h>
> >+#include <linux/slab.h>
> >+
> >+#include <dt-bindings/mfd/st-lpc.h>
> >+
> >+/* Low Power Timer */
> >+#define LPC_LPT_LSB_OFF		0x400
> >+#define LPC_LPT_MSB_OFF		0x404
> >+#define LPC_LPT_START_OFF	0x408
> >+
> >+static struct st_clksrc_ddata {
> >+	struct clk		*clk;
> >+	void __iomem		*base;
> >+} ddata;
> >+
> >+static void st_clksrc_reset(void)
> >+{
> >+	writel_relaxed(0, ddata.base + LPC_LPT_START_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_MSB_OFF);
> >+	writel_relaxed(0, ddata.base + LPC_LPT_LSB_OFF);
> >+	writel_relaxed(1, ddata.base + LPC_LPT_START_OFF);
> >+}
> >+
> >+static int __init st_clksrc_init(void)
> >+{
> >+	unsigned long rate;
> >+	int ret;
> >+
> >+	st_clksrc_reset();
> >+
> >+	rate = clk_get_rate(ddata.clk);
> >+
> >+	ret = clocksource_mmio_init(ddata.base + LPC_LPT_LSB_OFF,
> >+				    "clksrc-st-lpc", rate, 300, 32,
> >+				    clocksource_mmio_readl_up);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: Failed to register clocksource\n");
> >+		return ret;
> >+	}
> >+
> >+	return 0;
> >+}
> >+
> >+static int st_clksrc_setup_clk(struct device_node *np)
> >+{
> >+	struct clk *clk;
> >+	int ret;
> >+
> >+	clk = of_clk_get(np, 0);
> >+	if (IS_ERR(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock\n");
> >+		ret = PTR_ERR(clk);
> >+		return ret;
> 
> return PTR_ERR(clk);
> 
> so you can get rid of the 'int ret' variable.

Absolutely.  Good spot.

> >+	}
> >+
> >+	if (clk_prepare_enable(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to enable LPC clock\n");
> >+		return -EINVAL;
> >+	}
> >+
> >+	if (!clk_get_rate(clk)) {
> >+		pr_err("clksrc-st-lpc: Failed to get LPC clock rate\n");
> >+		clk_disable_unprepare(clk);
> >+		return -EINVAL;
> >+	}
> >+
> >+	ddata.clk = clk;
> >+
> >+	return 0;
> >+}
> >+
> >+static void __init st_clksrc_of_register(struct device_node *np)
> >+{
> >+	int ret;
> >+	uint32_t mode;
> >+
> >+	ret = of_property_read_u32(np, "st,lpc-mode", &mode);
> >+	if (ret) {
> >+		pr_err("clksrc-st-lpc: An LPC mode must be provided\n");
> >+		return;
> >+	}
> >+
> >+	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >+	if (mode != ST_LPC_MODE_CLKSRC)
> >+		return;
> 
> I am confused with this patch description + comment and the patch
> 1's description.
> 
> For the former, I understand the LPC could be in RTC or WDT mode and
> used as a clocksource (clksrc + rtc / clksrc + wdt), for the latter
> I understand there are three modes clocksource, rtc and watchdog
> (mutually exclusive). Could you clarify ?

They are all mutually exclusive.  I will fix-up the commit log to
re-enforce this.

> >+
> >+	ddata.base = of_iomap(np, 0);
> >+	if (!ddata.base) {
> >+		pr_err("clksrc-st-lpc: Unable to map iomem\n");
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_setup_clk(np)) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	if (st_clksrc_init()) {
> >+		iounmap(ddata.base);
> >+		return;
> >+	}
> >+
> >+	pr_info("clksrc-st-lpc: clocksource initialised - running @ %luHz\n",
> >+		clk_get_rate(ddata.clk));
> >+}
> >+CLOCKSOURCE_OF_DECLARE(ddata, "st,stih407-lpc", st_clksrc_of_register);
> >
> 
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Sat, 09 May 2015, Alexandre Belloni wrote:

> On 07/05/2015 at 14:38:39 +0100, Lee Jones wrote :
> > Initial submission adding support for this IP only included Watchdog and
> > the Real-Time Clock.  Now the third (and final) device is enabled this
> > trivial patch is required to update the comment in the RTC driver to
> > encompass Clocksource.
> > 
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Thanks.

> I'm guessing this will go through the mfd tree along with the driver?

Yes, that is the plan, if that's okay with you?

> > ---
> >  drivers/rtc/rtc-st-lpc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
> > index 3f9d0ac..74c0a33 100644
> > --- a/drivers/rtc/rtc-st-lpc.c
> > +++ b/drivers/rtc/rtc-st-lpc.c
> > @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
> >  		return -EINVAL;
> >  	}
> >  
> > -	/* LPC can either run in RTC or WDT mode */
> > +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >  	if (mode != ST_LPC_MODE_RTC)
> >  		return -ENODEV;
> >  
> 

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Sat, 09 May 2015, Alexandre Belloni wrote:

> On 07/05/2015 at 14:38:39 +0100, Lee Jones wrote :
> > Initial submission adding support for this IP only included Watchdog an=
d
> > the Real-Time Clock.  Now the third (and final) device is enabled this
> > trivial patch is required to update the comment in the RTC driver to
> > encompass Clocksource.
> >=20
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Thanks.

> I'm guessing this will go through the mfd tree along with the driver?

Yes, that is the plan, if that's okay with you?

> > ---
> >  drivers/rtc/rtc-st-lpc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >=20
> > diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
> > index 3f9d0ac..74c0a33 100644
> > --- a/drivers/rtc/rtc-st-lpc.c
> > +++ b/drivers/rtc/rtc-st-lpc.c
> > @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pde=
v)
> >  		return -EINVAL;
> >  	}
> > =20
> > -	/* LPC can either run in RTC or WDT mode */
> > +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >  	if (mode !=3D ST_LPC_MODE_RTC)
> >  		return -ENODEV;
> > =20
>=20

--=20
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Linaro.org =E2=94=82 Open source software for ARM SoCs
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Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Sat, 09 May 2015, Alexandre Belloni wrote:

> On 07/05/2015 at 14:38:39 +0100, Lee Jones wrote :
> > Initial submission adding support for this IP only included Watchdog and
> > the Real-Time Clock.  Now the third (and final) device is enabled this
> > trivial patch is required to update the comment in the RTC driver to
> > encompass Clocksource.
> > 
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Thanks.

> I'm guessing this will go through the mfd tree along with the driver?

Yes, that is the plan, if that's okay with you?

> > ---
> >  drivers/rtc/rtc-st-lpc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
> > index 3f9d0ac..74c0a33 100644
> > --- a/drivers/rtc/rtc-st-lpc.c
> > +++ b/drivers/rtc/rtc-st-lpc.c
> > @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
> >  		return -EINVAL;
> >  	}
> >  
> > -	/* LPC can either run in RTC or WDT mode */
> > +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >  	if (mode != ST_LPC_MODE_RTC)
> >  		return -ENODEV;
> >  
> 

-- 
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Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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[rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Sat, 09 May 2015, Alexandre Belloni wrote:

> On 07/05/2015 at 14:38:39 +0100, Lee Jones wrote :
> > Initial submission adding support for this IP only included Watchdog and
> > the Real-Time Clock.  Now the third (and final) device is enabled this
> > trivial patch is required to update the comment in the RTC driver to
> > encompass Clocksource.
> > 
> > Signed-off-by: Lee Jones <lee.jones@linaro.org>
> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>

Thanks.

> I'm guessing this will go through the mfd tree along with the driver?

Yes, that is the plan, if that's okay with you?

> > ---
> >  drivers/rtc/rtc-st-lpc.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/rtc/rtc-st-lpc.c b/drivers/rtc/rtc-st-lpc.c
> > index 3f9d0ac..74c0a33 100644
> > --- a/drivers/rtc/rtc-st-lpc.c
> > +++ b/drivers/rtc/rtc-st-lpc.c
> > @@ -208,7 +208,7 @@ static int st_rtc_probe(struct platform_device *pdev)
> >  		return -EINVAL;
> >  	}
> >  
> > -	/* LPC can either run in RTC or WDT mode */
> > +	/* LPC can either run as a Clocksource or in RTC or WDT mode */
> >  	if (mode != ST_LPC_MODE_RTC)
> >  		return -ENODEV;
> >  
> 

-- 
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Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Alexandre Belloni]

On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> On Sat, 09 May 2015, Alexandre Belloni wrote:
> > I'm guessing this will go through the mfd tree along with the driver?
> 
> Yes, that is the plan, if that's okay with you?
> 

Sure!


-- 
Alexandre Belloni, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Alexandre Belloni]

On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> On Sat, 09 May 2015, Alexandre Belloni wrote:
> > I'm guessing this will go through the mfd tree along with the driver?
> 
> Yes, that is the plan, if that's okay with you?
> 

Sure!


-- 
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Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Alexandre Belloni]

On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> On Sat, 09 May 2015, Alexandre Belloni wrote:
> > I'm guessing this will go through the mfd tree along with the driver?
> 
> Yes, that is the plan, if that's okay with you?
> 

Sure!


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[rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Alexandre Belloni]

On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> On Sat, 09 May 2015, Alexandre Belloni wrote:
> > I'm guessing this will go through the mfd tree along with the driver?
> 
> Yes, that is the plan, if that's okay with you?
> 

Sure!


-- 
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Embedded Linux, Kernel and Android engineering
http://free-electrons.com

Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Mon, 11 May 2015, Alexandre Belloni wrote:
> On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> > On Sat, 09 May 2015, Alexandre Belloni wrote:
> > > I'm guessing this will go through the mfd tree along with the driver?
> > 
> > Yes, that is the plan, if that's okay with you?
> 
> Sure!

Perfect.  Thanks Alexandre.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog

Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Mon, 11 May 2015, Alexandre Belloni wrote:
> On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> > On Sat, 09 May 2015, Alexandre Belloni wrote:
> > > I'm guessing this will go through the mfd tree along with the driver?
> >=20
> > Yes, that is the plan, if that's okay with you?
>=20
> Sure!

Perfect.  Thanks Alexandre.

--=20
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Linaro.org =E2=94=82 Open source software for ARM SoCs
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Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Mon, 11 May 2015, Alexandre Belloni wrote:
> On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> > On Sat, 09 May 2015, Alexandre Belloni wrote:
> > > I'm guessing this will go through the mfd tree along with the driver?
> > 
> > Yes, that is the plan, if that's okay with you?
> 
> Sure!

Perfect.  Thanks Alexandre.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
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Re: [rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Mon, 11 May 2015, Alexandre Belloni wrote:
> On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> > On Sat, 09 May 2015, Alexandre Belloni wrote:
> > > I'm guessing this will go through the mfd tree along with the driver?
> > 
> > Yes, that is the plan, if that's okay with you?
> 
> Sure!

Perfect.  Thanks Alexandre.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog
--
To unsubscribe from this list: send the line "unsubscribe linux-watchdog" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[rtc-linux] [PATCH 07/12] rtc: st: Update IP layout information to include Clocksource

[Lee Jones]

On Mon, 11 May 2015, Alexandre Belloni wrote:
> On 11/05/2015 at 11:54:33 +0100, Lee Jones wrote :
> > On Sat, 09 May 2015, Alexandre Belloni wrote:
> > > I'm guessing this will go through the mfd tree along with the driver?
> > 
> > Yes, that is the plan, if that's okay with you?
> 
> Sure!

Perfect.  Thanks Alexandre.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org ? Open source software for ARM SoCs
Follow Linaro: Facebook | Twitter | Blog