* [PATCH V7 0/3] soc: imx: add scu power domain driver
@ 2018-10-18 17:25 ` A.s. Dong
0 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:25 UTC (permalink / raw)
To: linux-arm-kernel
This patch set adds the scu based power domain driver.
It depends on SCU driver.
Change Log:
v6->v7:
* keep "fsl,scu-pd" as fall back compatible string
v5->v6:
* only compatible string name updated from fsl,scu-pd to fsl,imx8qxp-scu-pd
accordingly
v4->v5:
* some minor improvements according to Sascha's suggestion
Note: did not use dev_* print functions due to we already have proper
prefix by redefining pr_fmt. So it seems not quite neccesary
to pass in a struct device * pointer for debug purpose only in
each functions.
v3->v4:
* only scu headfile path update
v2->v3:
* structure and enums name update
* api usage update
Dong Aisheng (3):
dt-bindings: fsl: scu: make power domain compatible string SoC
specific
firmware: imx: add pm svc headfile
firmware: imx: add SCU power domain driver
.../devicetree/bindings/arm/freescale/fsl,scu.txt | 6 +-
drivers/firmware/imx/Kconfig | 6 +
drivers/firmware/imx/Makefile | 3 +-
drivers/firmware/imx/scu-pd.c | 164 +++++++++++++++++++++
include/linux/firmware/imx/sci.h | 1 +
include/linux/firmware/imx/svc/pm.h | 85 +++++++++++
6 files changed, 262 insertions(+), 3 deletions(-)
create mode 100644 drivers/firmware/imx/scu-pd.c
create mode 100644 include/linux/firmware/imx/svc/pm.h
--
2.7.4
^ permalink raw reply [flat|nested] 10+ messages in thread* [PATCH V7 1/3] dt-bindings: fsl: scu: make power domain compatible string SoC specific
2018-10-18 17:25 ` A.s. Dong
@ 2018-10-18 17:25 ` A.s. Dong
-1 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:25 UTC (permalink / raw)
To: linux-arm-kernel
Cc: A.s. Dong, Mark Rutland, ulf.hansson, dongas86, khilman,
linux-pm, rjw, devicetree, Rob Herring, dl-linux-imx, kernel,
Fabio Estevam, shawnguo
As the power domain API might change in the future for new SoCs, although
in a very low possibility, it's still better to make the compatible string
more SoC specific to avoid the possible version change for new SoCs.
Due to there're still no users in kernel, it's safe to update it without
breaking anything.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree@vger.kernel.org
Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
ChangeLog:
v6->v7:
* keep "fsl,scu-pd" as fall back compatible string
v5->v6:
* new patch
---
Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index 46d0af1..e5f3edf 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -58,7 +58,9 @@ This binding for the SCU power domain providers uses the generic power
domain binding[2].
Required properties:
-- compatible: Should be "fsl,scu-pd".
+- compatible: Should be one of:
+ "fsl,imx8qxp-scu-pd"
+ followed by "fsl,scu-pd"
- #address-cells: Should be 1.
- #size-cells: Should be 0.
@@ -153,7 +155,7 @@ firmware {
};
imx8qx-pm {
- compatible = "fsl,scu-pd";
+ compatible = "fsl,imx8qxp-scu-pd", "fsl,scu-pd";
#address-cells = <1>;
#size-cells = <0>;
--
2.7.4
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH V7 1/3] dt-bindings: fsl: scu: make power domain compatible string SoC specific
@ 2018-10-18 17:25 ` A.s. Dong
0 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:25 UTC (permalink / raw)
To: linux-arm-kernel
As the power domain API might change in the future for new SoCs, although
in a very low possibility, it's still better to make the compatible string
more SoC specific to avoid the possible version change for new SoCs.
Due to there're still no users in kernel, it's safe to update it without
breaking anything.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: devicetree at vger.kernel.org
Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
ChangeLog:
v6->v7:
* keep "fsl,scu-pd" as fall back compatible string
v5->v6:
* new patch
---
Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
index 46d0af1..e5f3edf 100644
--- a/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
+++ b/Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt
@@ -58,7 +58,9 @@ This binding for the SCU power domain providers uses the generic power
domain binding[2].
Required properties:
-- compatible: Should be "fsl,scu-pd".
+- compatible: Should be one of:
+ "fsl,imx8qxp-scu-pd"
+ followed by "fsl,scu-pd"
- #address-cells: Should be 1.
- #size-cells: Should be 0.
@@ -153,7 +155,7 @@ firmware {
};
imx8qx-pm {
- compatible = "fsl,scu-pd";
+ compatible = "fsl,imx8qxp-scu-pd", "fsl,scu-pd";
#address-cells = <1>;
#size-cells = <0>;
--
2.7.4
^ permalink raw reply related [flat|nested] 10+ messages in thread* Re: [PATCH V7 1/3] dt-bindings: fsl: scu: make power domain compatible string SoC specific
2018-10-18 17:25 ` A.s. Dong
@ 2018-10-18 18:24 ` Rob Herring
-1 siblings, 0 replies; 10+ messages in thread
From: Rob Herring @ 2018-10-18 18:24 UTC (permalink / raw)
Cc: A.s. Dong, Mark Rutland, ulf.hansson, dongas86, khilman,
linux-pm, rjw, devicetree, dl-linux-imx, kernel, Fabio Estevam,
shawnguo, linux-arm-kernel
On Thu, 18 Oct 2018 17:25:57 +0000, "A.s. Dong" wrote:
> As the power domain API might change in the future for new SoCs, although
> in a very low possibility, it's still better to make the compatible string
> more SoC specific to avoid the possible version change for new SoCs.
>
> Due to there're still no users in kernel, it's safe to update it without
> breaking anything.
>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: Sascha Hauer <kernel@pengutronix.de>
> Cc: Fabio Estevam <fabio.estevam@nxp.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: devicetree@vger.kernel.org
> Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
> ---
> ChangeLog:
> v6->v7:
> * keep "fsl,scu-pd" as fall back compatible string
> v5->v6:
> * new patch
> ---
> Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH V7 1/3] dt-bindings: fsl: scu: make power domain compatible string SoC specific
@ 2018-10-18 18:24 ` Rob Herring
0 siblings, 0 replies; 10+ messages in thread
From: Rob Herring @ 2018-10-18 18:24 UTC (permalink / raw)
To: linux-arm-kernel
On Thu, 18 Oct 2018 17:25:57 +0000, "A.s. Dong" wrote:
> As the power domain API might change in the future for new SoCs, although
> in a very low possibility, it's still better to make the compatible string
> more SoC specific to avoid the possible version change for new SoCs.
>
> Due to there're still no users in kernel, it's safe to update it without
> breaking anything.
>
> Cc: Shawn Guo <shawnguo@kernel.org>
> Cc: Sascha Hauer <kernel@pengutronix.de>
> Cc: Fabio Estevam <fabio.estevam@nxp.com>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: Mark Rutland <mark.rutland@arm.com>
> Cc: devicetree at vger.kernel.org
> Suggested-by: Sascha Hauer <s.hauer@pengutronix.de>
> Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
> ---
> ChangeLog:
> v6->v7:
> * keep "fsl,scu-pd" as fall back compatible string
> v5->v6:
> * new patch
> ---
> Documentation/devicetree/bindings/arm/freescale/fsl,scu.txt | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 10+ messages in thread
* [PATCH V7 2/3] firmware: imx: add pm svc headfile
2018-10-18 17:25 ` A.s. Dong
@ 2018-10-18 17:26 ` A.s. Dong
-1 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:26 UTC (permalink / raw)
To: linux-arm-kernel
Cc: A.s. Dong, ulf.hansson, dongas86, khilman, linux-pm, rjw,
dl-linux-imx, kernel, Fabio Estevam, shawnguo
Add SCU PM SVC related protocol definitions which will be used by a number
of PM functions like Power Domain, Clock, Reset and etc. The detailed
implementation of each function will put in the individual function drivers.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
v3->v4:
* update firmware headfile patch from include/soc/imx to
include/linux/firmware/imx
v2->v3:
* name updated with IMX_SC prefix
v1->v2:
* new introduced
---
include/linux/firmware/imx/sci.h | 1 +
include/linux/firmware/imx/svc/pm.h | 85 +++++++++++++++++++++++++++++++++++++
2 files changed, 86 insertions(+)
create mode 100644 include/linux/firmware/imx/svc/pm.h
diff --git a/include/linux/firmware/imx/sci.h b/include/linux/firmware/imx/sci.h
index 29ada60..ebc5509 100644
--- a/include/linux/firmware/imx/sci.h
+++ b/include/linux/firmware/imx/sci.h
@@ -14,4 +14,5 @@
#include <linux/firmware/imx/types.h>
#include <linux/firmware/imx/svc/misc.h>
+#include <linux/firmware/imx/svc/pm.h>
#endif /* _SC_SCI_H */
diff --git a/include/linux/firmware/imx/svc/pm.h b/include/linux/firmware/imx/svc/pm.h
new file mode 100644
index 0000000..ee5a7bb
--- /dev/null
+++ b/include/linux/firmware/imx/svc/pm.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ *
+ * Header file containing the public API for the System Controller (SC)
+ * Power Management (PM) function. This includes functions for power state
+ * control, clock control, reset control, and wake-up event control.
+ *
+ * PM_SVC (SVC) Power Management Service
+ *
+ * Module for the Power Management (PM) service.
+ */
+
+#ifndef _SC_PM_API_H
+#define _SC_PM_API_H
+
+#include <linux/firmware/imx/sci.h>
+
+/*
+ * This type is used to indicate RPC PM function calls.
+ */
+enum imx_sc_pm_func {
+ IMX_SC_PM_FUNC_UNKNOWN = 0,
+ IMX_SC_PM_FUNC_SET_SYS_POWER_MODE = 19,
+ IMX_SC_PM_FUNC_SET_PARTITION_POWER_MODE = 1,
+ IMX_SC_PM_FUNC_GET_SYS_POWER_MODE = 2,
+ IMX_SC_PM_FUNC_SET_RESOURCE_POWER_MODE = 3,
+ IMX_SC_PM_FUNC_GET_RESOURCE_POWER_MODE = 4,
+ IMX_SC_PM_FUNC_REQ_LOW_POWER_MODE = 16,
+ IMX_SC_PM_FUNC_SET_CPU_RESUME_ADDR = 17,
+ IMX_SC_PM_FUNC_REQ_SYS_IF_POWER_MODE = 18,
+ IMX_SC_PM_FUNC_SET_CLOCK_RATE = 5,
+ IMX_SC_PM_FUNC_GET_CLOCK_RATE = 6,
+ IMX_SC_PM_FUNC_CLOCK_ENABLE = 7,
+ IMX_SC_PM_FUNC_SET_CLOCK_PARENT = 14,
+ IMX_SC_PM_FUNC_GET_CLOCK_PARENT = 15,
+ IMX_SC_PM_FUNC_RESET = 13,
+ IMX_SC_PM_FUNC_RESET_REASON = 10,
+ IMX_SC_PM_FUNC_BOOT = 8,
+ IMX_SC_PM_FUNC_REBOOT = 9,
+ IMX_SC_PM_FUNC_REBOOT_PARTITION = 12,
+ IMX_SC_PM_FUNC_CPU_START = 11,
+};
+
+/*
+ * Defines for ALL parameters
+ */
+#define IMX_SC_PM_CLK_ALL UINT8_MAX /* All clocks */
+
+/*
+ * Defines for SC PM Power Mode
+ */
+#define IMX_SC_PM_PW_MODE_OFF 0 /* Power off */
+#define IMX_SC_PM_PW_MODE_STBY 1 /* Power in standby */
+#define IMX_SC_PM_PW_MODE_LP 2 /* Power in low-power */
+#define IMX_SC_PM_PW_MODE_ON 3 /* Power on */
+
+/*
+ * Defines for SC PM CLK
+ */
+#define IMX_SC_PM_CLK_SLV_BUS 0 /* Slave bus clock */
+#define IMX_SC_PM_CLK_MST_BUS 1 /* Master bus clock */
+#define IMX_SC_PM_CLK_PER 2 /* Peripheral clock */
+#define IMX_SC_PM_CLK_PHY 3 /* Phy clock */
+#define IMX_SC_PM_CLK_MISC 4 /* Misc clock */
+#define IMX_SC_PM_CLK_MISC0 0 /* Misc 0 clock */
+#define IMX_SC_PM_CLK_MISC1 1 /* Misc 1 clock */
+#define IMX_SC_PM_CLK_MISC2 2 /* Misc 2 clock */
+#define IMX_SC_PM_CLK_MISC3 3 /* Misc 3 clock */
+#define IMX_SC_PM_CLK_MISC4 4 /* Misc 4 clock */
+#define IMX_SC_PM_CLK_CPU 2 /* CPU clock */
+#define IMX_SC_PM_CLK_PLL 4 /* PLL */
+#define IMX_SC_PM_CLK_BYPASS 4 /* Bypass clock */
+
+/*
+ * Defines for SC PM CLK Parent
+ */
+#define IMX_SC_PM_PARENT_XTAL 0 /* Parent is XTAL. */
+#define IMX_SC_PM_PARENT_PLL0 1 /* Parent is PLL0 */
+#define IMX_SC_PM_PARENT_PLL1 2 /* Parent is PLL1 or PLL0/2 */
+#define IMX_SC_PM_PARENT_PLL2 3 /* Parent in PLL2 or PLL0/4 */
+#define IMX_SC_PM_PARENT_BYPS 4 /* Parent is a bypass clock. */
+
+#endif /* _SC_PM_API_H */
--
2.7.4
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH V7 2/3] firmware: imx: add pm svc headfile
@ 2018-10-18 17:26 ` A.s. Dong
0 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:26 UTC (permalink / raw)
To: linux-arm-kernel
Add SCU PM SVC related protocol definitions which will be used by a number
of PM functions like Power Domain, Clock, Reset and etc. The detailed
implementation of each function will put in the individual function drivers.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
v3->v4:
* update firmware headfile patch from include/soc/imx to
include/linux/firmware/imx
v2->v3:
* name updated with IMX_SC prefix
v1->v2:
* new introduced
---
include/linux/firmware/imx/sci.h | 1 +
include/linux/firmware/imx/svc/pm.h | 85 +++++++++++++++++++++++++++++++++++++
2 files changed, 86 insertions(+)
create mode 100644 include/linux/firmware/imx/svc/pm.h
diff --git a/include/linux/firmware/imx/sci.h b/include/linux/firmware/imx/sci.h
index 29ada60..ebc5509 100644
--- a/include/linux/firmware/imx/sci.h
+++ b/include/linux/firmware/imx/sci.h
@@ -14,4 +14,5 @@
#include <linux/firmware/imx/types.h>
#include <linux/firmware/imx/svc/misc.h>
+#include <linux/firmware/imx/svc/pm.h>
#endif /* _SC_SCI_H */
diff --git a/include/linux/firmware/imx/svc/pm.h b/include/linux/firmware/imx/svc/pm.h
new file mode 100644
index 0000000..ee5a7bb
--- /dev/null
+++ b/include/linux/firmware/imx/svc/pm.h
@@ -0,0 +1,85 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ *
+ * Header file containing the public API for the System Controller (SC)
+ * Power Management (PM) function. This includes functions for power state
+ * control, clock control, reset control, and wake-up event control.
+ *
+ * PM_SVC (SVC) Power Management Service
+ *
+ * Module for the Power Management (PM) service.
+ */
+
+#ifndef _SC_PM_API_H
+#define _SC_PM_API_H
+
+#include <linux/firmware/imx/sci.h>
+
+/*
+ * This type is used to indicate RPC PM function calls.
+ */
+enum imx_sc_pm_func {
+ IMX_SC_PM_FUNC_UNKNOWN = 0,
+ IMX_SC_PM_FUNC_SET_SYS_POWER_MODE = 19,
+ IMX_SC_PM_FUNC_SET_PARTITION_POWER_MODE = 1,
+ IMX_SC_PM_FUNC_GET_SYS_POWER_MODE = 2,
+ IMX_SC_PM_FUNC_SET_RESOURCE_POWER_MODE = 3,
+ IMX_SC_PM_FUNC_GET_RESOURCE_POWER_MODE = 4,
+ IMX_SC_PM_FUNC_REQ_LOW_POWER_MODE = 16,
+ IMX_SC_PM_FUNC_SET_CPU_RESUME_ADDR = 17,
+ IMX_SC_PM_FUNC_REQ_SYS_IF_POWER_MODE = 18,
+ IMX_SC_PM_FUNC_SET_CLOCK_RATE = 5,
+ IMX_SC_PM_FUNC_GET_CLOCK_RATE = 6,
+ IMX_SC_PM_FUNC_CLOCK_ENABLE = 7,
+ IMX_SC_PM_FUNC_SET_CLOCK_PARENT = 14,
+ IMX_SC_PM_FUNC_GET_CLOCK_PARENT = 15,
+ IMX_SC_PM_FUNC_RESET = 13,
+ IMX_SC_PM_FUNC_RESET_REASON = 10,
+ IMX_SC_PM_FUNC_BOOT = 8,
+ IMX_SC_PM_FUNC_REBOOT = 9,
+ IMX_SC_PM_FUNC_REBOOT_PARTITION = 12,
+ IMX_SC_PM_FUNC_CPU_START = 11,
+};
+
+/*
+ * Defines for ALL parameters
+ */
+#define IMX_SC_PM_CLK_ALL UINT8_MAX /* All clocks */
+
+/*
+ * Defines for SC PM Power Mode
+ */
+#define IMX_SC_PM_PW_MODE_OFF 0 /* Power off */
+#define IMX_SC_PM_PW_MODE_STBY 1 /* Power in standby */
+#define IMX_SC_PM_PW_MODE_LP 2 /* Power in low-power */
+#define IMX_SC_PM_PW_MODE_ON 3 /* Power on */
+
+/*
+ * Defines for SC PM CLK
+ */
+#define IMX_SC_PM_CLK_SLV_BUS 0 /* Slave bus clock */
+#define IMX_SC_PM_CLK_MST_BUS 1 /* Master bus clock */
+#define IMX_SC_PM_CLK_PER 2 /* Peripheral clock */
+#define IMX_SC_PM_CLK_PHY 3 /* Phy clock */
+#define IMX_SC_PM_CLK_MISC 4 /* Misc clock */
+#define IMX_SC_PM_CLK_MISC0 0 /* Misc 0 clock */
+#define IMX_SC_PM_CLK_MISC1 1 /* Misc 1 clock */
+#define IMX_SC_PM_CLK_MISC2 2 /* Misc 2 clock */
+#define IMX_SC_PM_CLK_MISC3 3 /* Misc 3 clock */
+#define IMX_SC_PM_CLK_MISC4 4 /* Misc 4 clock */
+#define IMX_SC_PM_CLK_CPU 2 /* CPU clock */
+#define IMX_SC_PM_CLK_PLL 4 /* PLL */
+#define IMX_SC_PM_CLK_BYPASS 4 /* Bypass clock */
+
+/*
+ * Defines for SC PM CLK Parent
+ */
+#define IMX_SC_PM_PARENT_XTAL 0 /* Parent is XTAL. */
+#define IMX_SC_PM_PARENT_PLL0 1 /* Parent is PLL0 */
+#define IMX_SC_PM_PARENT_PLL1 2 /* Parent is PLL1 or PLL0/2 */
+#define IMX_SC_PM_PARENT_PLL2 3 /* Parent in PLL2 or PLL0/4 */
+#define IMX_SC_PM_PARENT_BYPS 4 /* Parent is a bypass clock. */
+
+#endif /* _SC_PM_API_H */
--
2.7.4
^ permalink raw reply related [flat|nested] 10+ messages in thread
* [PATCH V7 3/3] firmware: imx: add SCU power domain driver
2018-10-18 17:25 ` A.s. Dong
@ 2018-10-18 17:26 ` A.s. Dong
-1 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:26 UTC (permalink / raw)
To: linux-arm-kernel
Cc: A.s. Dong, ulf.hansson, dongas86, khilman, linux-pm, rjw,
dl-linux-imx, kernel, Fabio Estevam, shawnguo
Some i.MX SoCs contain a system controller that is responsible for
controlling the state of the IPs that are present. Communication
between the host processor running an OS and the system controller
happens through a SCU protocol. This patch adds SCU protocol based
power domains drivers.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: linux-pm@vger.kernel.org
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
ChangeLog:
v6->v7:
* still using generic "fsl,scu-pd" to driver binding incase the future
SoC is compatible
* remove unnecessary cast
v5->v6:
* only compatible string name updated from fsl,scu-pd to fsl,imx8qxp-scu-pd
accordingly
v4->v5:
* minor improvements according to Sascha's suggestions
v3->v4:
* update firmware headfile patch from include/soc/imx to
include/linux/firmware/imx
v2->v3:
* name of structures/enums updated with imx_sc prefix
v1->v2:
* move into drivers/firmware/imx
* Implement sc_pm_set_resource_power_mode() API in the driver instead
of call it via SCU API according to Sascha's suggestion
---
drivers/firmware/imx/Kconfig | 6 ++
drivers/firmware/imx/Makefile | 3 +-
drivers/firmware/imx/scu-pd.c | 164 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 172 insertions(+), 1 deletion(-)
create mode 100644 drivers/firmware/imx/scu-pd.c
diff --git a/drivers/firmware/imx/Kconfig b/drivers/firmware/imx/Kconfig
index b170c28..6a7a7c2 100644
--- a/drivers/firmware/imx/Kconfig
+++ b/drivers/firmware/imx/Kconfig
@@ -9,3 +9,9 @@ config IMX_SCU
This driver manages the IPC interface between host CPU and the
SCU firmware running on M4.
+
+config IMX_SCU_PD
+ bool "IMX SCU Power Domain driver"
+ depends on IMX_SCU
+ help
+ The System Controller Firmware (SCFW) based power domain driver.
diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile
index 0ac04df..1b2e15b 100644
--- a/drivers/firmware/imx/Makefile
+++ b/drivers/firmware/imx/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_IMX_SCU) += imx-scu.o misc.o
+obj-$(CONFIG_IMX_SCU) += imx-scu.o misc.o
+obj-$(CONFIG_IMX_SCU_PD) += scu-pd.o
diff --git a/drivers/firmware/imx/scu-pd.c b/drivers/firmware/imx/scu-pd.c
new file mode 100644
index 0000000..13478cd
--- /dev/null
+++ b/drivers/firmware/imx/scu-pd.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ * Dong Aisheng <aisheng.dong@nxp.com>
+ *
+ * Implementation of the SCU based Power Domains
+ */
+
+#define pr_fmt(fmt) "scu_pd: " fmt
+
+#include <linux/firmware/imx/sci.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+
+struct imx_sc_pm_domain {
+ struct generic_pm_domain pd;
+ u32 rsrc_id;
+};
+
+static struct imx_sc_ipc *pm_ipc_handle;
+
+/* SCU Power Mode Protocol definition */
+struct imx_sc_msg_req_set_resource_power_mode {
+ struct imx_sc_rpc_msg hdr;
+ u16 resource;
+ u8 mode;
+} __packed;
+
+static int imx_sc_pd_power(struct generic_pm_domain *domain, bool power_on)
+{
+ struct imx_sc_msg_req_set_resource_power_mode msg;
+ struct imx_sc_rpc_msg *hdr = &msg.hdr;
+ struct imx_sc_pm_domain *pd;
+ int ret;
+
+ pd = container_of(domain, struct imx_sc_pm_domain, pd);
+
+ hdr->ver = IMX_SC_RPC_VERSION;
+ hdr->svc = IMX_SC_RPC_SVC_PM;
+ hdr->func = IMX_SC_PM_FUNC_SET_RESOURCE_POWER_MODE;
+ hdr->size = 2;
+
+ msg.resource = pd->rsrc_id;
+ msg.mode = power_on ? IMX_SC_PM_PW_MODE_ON : IMX_SC_PM_PW_MODE_LP;
+
+ ret = imx_scu_call_rpc(pm_ipc_handle, &msg, true);
+ if (ret)
+ pr_err("failed to power %s resource %d ret %d\n",
+ power_on ? "up" : "off", pd->rsrc_id, ret);
+
+ return ret;
+}
+
+static int imx_sc_pd_power_on(struct generic_pm_domain *domain)
+{
+ return imx_sc_pd_power(domain, true);
+}
+
+static int imx_sc_pd_power_off(struct generic_pm_domain *domain)
+{
+ return imx_sc_pd_power(domain, false);
+}
+
+static struct generic_pm_domain *imx_sc_pm_add_one_domain(
+ struct device_node *np,
+ struct generic_pm_domain *genpd_parent)
+{
+ struct imx_sc_pm_domain *imx_sc_pd;
+ u32 rsrc_id;
+ int ret;
+
+ imx_sc_pd = kzalloc(sizeof(*imx_sc_pd), GFP_KERNEL);
+ if (!imx_sc_pd)
+ return ERR_PTR(-ENOMEM);
+
+ if (!of_property_read_u32(np, "reg", &rsrc_id)) {
+ if (rsrc_id >= IMX_SC_R_LAST) {
+ pr_warn("%pOF: invalid rsrc id %d found", np, rsrc_id);
+ ret = -EINVAL;
+ goto err;
+ }
+ imx_sc_pd->rsrc_id = rsrc_id;
+ imx_sc_pd->pd.power_off = imx_sc_pd_power_off;
+ imx_sc_pd->pd.power_on = imx_sc_pd_power_on;
+ } else {
+ imx_sc_pd->rsrc_id = IMX_SC_R_LAST;
+ }
+
+ imx_sc_pd->pd.name = np->name;
+
+ ret = pm_genpd_init(&imx_sc_pd->pd, NULL, true);
+ if (ret < 0)
+ goto err;
+
+ if (genpd_parent) {
+ ret = pm_genpd_add_subdomain(genpd_parent, &imx_sc_pd->pd);
+ if (ret)
+ goto err;
+ }
+
+ ret = of_genpd_add_provider_simple(np, &imx_sc_pd->pd);
+ if (!ret)
+ return &imx_sc_pd->pd;
+
+ pm_genpd_remove_subdomain(genpd_parent, &imx_sc_pd->pd);
+
+err:
+ pr_warn("failed to add PM domain %pOF: %d\n", np, ret);
+ kfree(imx_sc_pd);
+ return ERR_PTR(ret);
+}
+
+static void imx_sc_pm_add_pm_domains(struct device_node *parent,
+ struct generic_pm_domain *genpd_parent)
+{
+ struct generic_pm_domain *pd;
+ struct device_node *np;
+
+ for_each_child_of_node(parent, np) {
+ pd = imx_sc_pm_add_one_domain(np, genpd_parent);
+ if (!IS_ERR(pd))
+ imx_sc_pm_add_pm_domains(np, pd);
+ }
+}
+
+static int imx_sc_pd_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ ret = imx_scu_get_handle(&pm_ipc_handle);
+ if (ret)
+ return ret;
+
+ imx_sc_pm_add_pm_domains(np, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id imx_sc_pd_match[] = {
+ { .compatible = "fsl,scu-pd", },
+ { /* sentinel */ }
+};
+
+static struct platform_driver imx_sc_pd_driver = {
+ .driver = {
+ .name = "imx-scu-pd",
+ .of_match_table = imx_sc_pd_match,
+ },
+ .probe = imx_sc_pd_probe,
+};
+builtin_platform_driver(imx_sc_pd_driver);
+
+MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
+MODULE_DESCRIPTION("IMX SCU Power Domain driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
^ permalink raw reply related [flat|nested] 10+ messages in thread* [PATCH V7 3/3] firmware: imx: add SCU power domain driver
@ 2018-10-18 17:26 ` A.s. Dong
0 siblings, 0 replies; 10+ messages in thread
From: A.s. Dong @ 2018-10-18 17:26 UTC (permalink / raw)
To: linux-arm-kernel
Some i.MX SoCs contain a system controller that is responsible for
controlling the state of the IPs that are present. Communication
between the host processor running an OS and the system controller
happens through a SCU protocol. This patch adds SCU protocol based
power domains drivers.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Kevin Hilman <khilman@kernel.org>
Cc: linux-pm at vger.kernel.org
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
---
ChangeLog:
v6->v7:
* still using generic "fsl,scu-pd" to driver binding incase the future
SoC is compatible
* remove unnecessary cast
v5->v6:
* only compatible string name updated from fsl,scu-pd to fsl,imx8qxp-scu-pd
accordingly
v4->v5:
* minor improvements according to Sascha's suggestions
v3->v4:
* update firmware headfile patch from include/soc/imx to
include/linux/firmware/imx
v2->v3:
* name of structures/enums updated with imx_sc prefix
v1->v2:
* move into drivers/firmware/imx
* Implement sc_pm_set_resource_power_mode() API in the driver instead
of call it via SCU API according to Sascha's suggestion
---
drivers/firmware/imx/Kconfig | 6 ++
drivers/firmware/imx/Makefile | 3 +-
drivers/firmware/imx/scu-pd.c | 164 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 172 insertions(+), 1 deletion(-)
create mode 100644 drivers/firmware/imx/scu-pd.c
diff --git a/drivers/firmware/imx/Kconfig b/drivers/firmware/imx/Kconfig
index b170c28..6a7a7c2 100644
--- a/drivers/firmware/imx/Kconfig
+++ b/drivers/firmware/imx/Kconfig
@@ -9,3 +9,9 @@ config IMX_SCU
This driver manages the IPC interface between host CPU and the
SCU firmware running on M4.
+
+config IMX_SCU_PD
+ bool "IMX SCU Power Domain driver"
+ depends on IMX_SCU
+ help
+ The System Controller Firmware (SCFW) based power domain driver.
diff --git a/drivers/firmware/imx/Makefile b/drivers/firmware/imx/Makefile
index 0ac04df..1b2e15b 100644
--- a/drivers/firmware/imx/Makefile
+++ b/drivers/firmware/imx/Makefile
@@ -1,2 +1,3 @@
# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_IMX_SCU) += imx-scu.o misc.o
+obj-$(CONFIG_IMX_SCU) += imx-scu.o misc.o
+obj-$(CONFIG_IMX_SCU_PD) += scu-pd.o
diff --git a/drivers/firmware/imx/scu-pd.c b/drivers/firmware/imx/scu-pd.c
new file mode 100644
index 0000000..13478cd
--- /dev/null
+++ b/drivers/firmware/imx/scu-pd.c
@@ -0,0 +1,164 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Freescale Semiconductor, Inc.
+ * Copyright 2017~2018 NXP
+ * Dong Aisheng <aisheng.dong@nxp.com>
+ *
+ * Implementation of the SCU based Power Domains
+ */
+
+#define pr_fmt(fmt) "scu_pd: " fmt
+
+#include <linux/firmware/imx/sci.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/pm.h>
+#include <linux/pm_domain.h>
+#include <linux/slab.h>
+
+struct imx_sc_pm_domain {
+ struct generic_pm_domain pd;
+ u32 rsrc_id;
+};
+
+static struct imx_sc_ipc *pm_ipc_handle;
+
+/* SCU Power Mode Protocol definition */
+struct imx_sc_msg_req_set_resource_power_mode {
+ struct imx_sc_rpc_msg hdr;
+ u16 resource;
+ u8 mode;
+} __packed;
+
+static int imx_sc_pd_power(struct generic_pm_domain *domain, bool power_on)
+{
+ struct imx_sc_msg_req_set_resource_power_mode msg;
+ struct imx_sc_rpc_msg *hdr = &msg.hdr;
+ struct imx_sc_pm_domain *pd;
+ int ret;
+
+ pd = container_of(domain, struct imx_sc_pm_domain, pd);
+
+ hdr->ver = IMX_SC_RPC_VERSION;
+ hdr->svc = IMX_SC_RPC_SVC_PM;
+ hdr->func = IMX_SC_PM_FUNC_SET_RESOURCE_POWER_MODE;
+ hdr->size = 2;
+
+ msg.resource = pd->rsrc_id;
+ msg.mode = power_on ? IMX_SC_PM_PW_MODE_ON : IMX_SC_PM_PW_MODE_LP;
+
+ ret = imx_scu_call_rpc(pm_ipc_handle, &msg, true);
+ if (ret)
+ pr_err("failed to power %s resource %d ret %d\n",
+ power_on ? "up" : "off", pd->rsrc_id, ret);
+
+ return ret;
+}
+
+static int imx_sc_pd_power_on(struct generic_pm_domain *domain)
+{
+ return imx_sc_pd_power(domain, true);
+}
+
+static int imx_sc_pd_power_off(struct generic_pm_domain *domain)
+{
+ return imx_sc_pd_power(domain, false);
+}
+
+static struct generic_pm_domain *imx_sc_pm_add_one_domain(
+ struct device_node *np,
+ struct generic_pm_domain *genpd_parent)
+{
+ struct imx_sc_pm_domain *imx_sc_pd;
+ u32 rsrc_id;
+ int ret;
+
+ imx_sc_pd = kzalloc(sizeof(*imx_sc_pd), GFP_KERNEL);
+ if (!imx_sc_pd)
+ return ERR_PTR(-ENOMEM);
+
+ if (!of_property_read_u32(np, "reg", &rsrc_id)) {
+ if (rsrc_id >= IMX_SC_R_LAST) {
+ pr_warn("%pOF: invalid rsrc id %d found", np, rsrc_id);
+ ret = -EINVAL;
+ goto err;
+ }
+ imx_sc_pd->rsrc_id = rsrc_id;
+ imx_sc_pd->pd.power_off = imx_sc_pd_power_off;
+ imx_sc_pd->pd.power_on = imx_sc_pd_power_on;
+ } else {
+ imx_sc_pd->rsrc_id = IMX_SC_R_LAST;
+ }
+
+ imx_sc_pd->pd.name = np->name;
+
+ ret = pm_genpd_init(&imx_sc_pd->pd, NULL, true);
+ if (ret < 0)
+ goto err;
+
+ if (genpd_parent) {
+ ret = pm_genpd_add_subdomain(genpd_parent, &imx_sc_pd->pd);
+ if (ret)
+ goto err;
+ }
+
+ ret = of_genpd_add_provider_simple(np, &imx_sc_pd->pd);
+ if (!ret)
+ return &imx_sc_pd->pd;
+
+ pm_genpd_remove_subdomain(genpd_parent, &imx_sc_pd->pd);
+
+err:
+ pr_warn("failed to add PM domain %pOF: %d\n", np, ret);
+ kfree(imx_sc_pd);
+ return ERR_PTR(ret);
+}
+
+static void imx_sc_pm_add_pm_domains(struct device_node *parent,
+ struct generic_pm_domain *genpd_parent)
+{
+ struct generic_pm_domain *pd;
+ struct device_node *np;
+
+ for_each_child_of_node(parent, np) {
+ pd = imx_sc_pm_add_one_domain(np, genpd_parent);
+ if (!IS_ERR(pd))
+ imx_sc_pm_add_pm_domains(np, pd);
+ }
+}
+
+static int imx_sc_pd_probe(struct platform_device *pdev)
+{
+ struct device_node *np = pdev->dev.of_node;
+ int ret;
+
+ ret = imx_scu_get_handle(&pm_ipc_handle);
+ if (ret)
+ return ret;
+
+ imx_sc_pm_add_pm_domains(np, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id imx_sc_pd_match[] = {
+ { .compatible = "fsl,scu-pd", },
+ { /* sentinel */ }
+};
+
+static struct platform_driver imx_sc_pd_driver = {
+ .driver = {
+ .name = "imx-scu-pd",
+ .of_match_table = imx_sc_pd_match,
+ },
+ .probe = imx_sc_pd_probe,
+};
+builtin_platform_driver(imx_sc_pd_driver);
+
+MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
+MODULE_DESCRIPTION("IMX SCU Power Domain driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4
^ permalink raw reply related [flat|nested] 10+ messages in thread