* [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block
@ 2022-03-22 13:00 shruthi.sanil
2022-03-22 13:00 ` [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer shruthi.sanil
` (2 more replies)
0 siblings, 3 replies; 9+ messages in thread
From: shruthi.sanil @ 2022-03-22 13:00 UTC (permalink / raw)
To: daniel.lezcano, tglx, robh+dt, linux-kernel, devicetree
Cc: andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar,
shruthi.sanil
From: Shruthi Sanil <shruthi.sanil@intel.com>
The timer block supports 1 64-bit free running counter
and 8 32-bit general purpose timers.
Patch 1 holds the device tree binding documentation.
Patch 2 holds the device driver.
This driver is tested on the Keem Bay evaluation module board.
Changes since v9:
- Updated the error message with the macro FW_BUG wherever applicable.
Changes since v8:
- The clockevent stucture has been declared as a global static variable,
rather than allocating memory using kzalloc during probing.
- Updated the print statement indicating the configuration missing as the FW Bug.
- Updated the comments in the function keembay_timer_isr().
- Updated the dt-binding to remove 'oneOf' as there is only 1 entry.
- Updated the dt-binding description clearly indicating that
the descrption is about the undelying HW.
Changes since v7:
- Added back the compatible string "intel,keembay-gpt-creg"
as an enum to the mfd device node in the device tree bindings.
- As the timer is used as a broadcast timer during CPU idle,
only one timer is needed. Hence updated the driver accordingly
incorporating the review comments.
Changes since v6:
- Removed the unused compatible string from the mfd device node
to fix the error thrown by the make dt-binding command.
Changes since v5:
- Created a MFD device for the common configuration register
in the device tree bindings.
- Updated the timer driver with the MFD framework to access the
common configuration register.
Changes since v4:
- Updated the description in the device tree bindings.
- Updated the unit address of all the timers and counter
in the device tree binding.
Changes since v3:
- Update in KConfig file to support COMPILE_TEST for Keem Bay timer.
- Update in device tree bindings to remove status field.
- Update in device tree bindings to remove 64-bit address space for
the child nodes by using non-empty ranges.
Changes since v2:
- Add multi timer support.
- Update in the device tree binding to support multi timers.
- Code optimization.
Changes since v1:
- Add support for KEEMBAY_TIMER to get selected through Kconfig.platforms.
- Add CLOCK_EVT_FEAT_DYNIRQ as part of clockevent feature.
- Avoid overlapping reg regions across 2 device nodes.
- Simplify 2 device nodes as 1 because both are from same IP block.
- Adapt the driver code according to the new simplified devicetree.
Shruthi Sanil (2):
dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
clocksource: Add Intel Keem Bay timer support
.../bindings/timer/intel,keembay-timer.yaml | 125 ++++++++++
MAINTAINERS | 6 +
drivers/clocksource/Kconfig | 11 +
drivers/clocksource/Makefile | 1 +
drivers/clocksource/timer-keembay.c | 226 ++++++++++++++++++
5 files changed, 369 insertions(+)
create mode 100644 Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
create mode 100644 drivers/clocksource/timer-keembay.c
base-commit: ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2
--
2.17.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
2022-03-22 13:00 [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block shruthi.sanil
@ 2022-03-22 13:00 ` shruthi.sanil
2022-03-30 11:44 ` Daniel Lezcano
2022-03-22 13:00 ` [PATCH v10 2/2] clocksource: Add Intel Keem Bay timer support shruthi.sanil
2022-03-30 5:04 ` [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block Sanil, Shruthi
2 siblings, 1 reply; 9+ messages in thread
From: shruthi.sanil @ 2022-03-22 13:00 UTC (permalink / raw)
To: daniel.lezcano, tglx, robh+dt, linux-kernel, devicetree
Cc: andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar,
shruthi.sanil
From: Shruthi Sanil <shruthi.sanil@intel.com>
Add Device Tree bindings for the Timer IP, which can be used as
clocksource and clockevent device in the Intel Keem Bay SoC.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
---
.../bindings/timer/intel,keembay-timer.yaml | 125 ++++++++++++++++++
1 file changed, 125 insertions(+)
create mode 100644 Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
diff --git a/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml b/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
new file mode 100644
index 000000000000..333f137e39e0
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
@@ -0,0 +1,125 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/intel,keembay-timer.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Intel Keem Bay SoC Timers
+
+maintainers:
+ - Shruthi Sanil <shruthi.sanil@intel.com>
+
+description: |
+ The Intel Keem Bay timer IP supports 1 free running counter and 8 timers.
+ Each timer is capable of generating inividual interrupt.
+ Both the features are enabled through the timer general config register.
+
+ The parent node represents the common general configuration details and
+ the child nodes represents the counter and timers.
+
+properties:
+ compatible:
+ items:
+ - enum:
+ - intel,keembay-gpt-creg
+ - const: simple-mfd
+
+ reg:
+ description: General configuration register address and length.
+ maxItems: 1
+
+ ranges: true
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 1
+
+required:
+ - compatible
+ - reg
+ - ranges
+ - "#address-cells"
+ - "#size-cells"
+
+patternProperties:
+ "^counter@[0-9a-f]+$":
+ description: Properties for Intel Keem Bay counter.
+ type: object
+ properties:
+ compatible:
+ items:
+ - enum:
+ - intel,keembay-counter
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ required:
+ - compatible
+ - reg
+ - clocks
+
+ "^timer@[0-9a-f]+$":
+ description: Properties for Intel Keem Bay timer
+ type: object
+ properties:
+ compatible:
+ items:
+ - enum:
+ - intel,keembay-timer
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ required:
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #define KEEM_BAY_A53_TIM
+
+ soc {
+ #address-cells = <0x2>;
+ #size-cells = <0x2>;
+
+ gpt@20331000 {
+ compatible = "intel,keembay-gpt-creg", "simple-mfd";
+ reg = <0x0 0x20331000 0x0 0xc>;
+ ranges = <0x0 0x0 0x20330000 0xF0>;
+ #address-cells = <0x1>;
+ #size-cells = <0x1>;
+
+ counter@e8 {
+ compatible = "intel,keembay-counter";
+ reg = <0xe8 0x8>;
+ clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
+ };
+
+ timer@30 {
+ compatible = "intel,keembay-timer";
+ reg = <0x30 0xc>;
+ interrupts = <GIC_SPI 0x5 IRQ_TYPE_LEVEL_HIGH>;
+ clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
+ };
+ };
+ };
+
+...
--
2.17.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [PATCH v10 2/2] clocksource: Add Intel Keem Bay timer support
2022-03-22 13:00 [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block shruthi.sanil
2022-03-22 13:00 ` [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer shruthi.sanil
@ 2022-03-22 13:00 ` shruthi.sanil
2022-03-30 5:04 ` [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block Sanil, Shruthi
2 siblings, 0 replies; 9+ messages in thread
From: shruthi.sanil @ 2022-03-22 13:00 UTC (permalink / raw)
To: daniel.lezcano, tglx, robh+dt, linux-kernel, devicetree
Cc: andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar,
shruthi.sanil
From: Shruthi Sanil <shruthi.sanil@intel.com>
The Intel Keem Bay timer driver supports clocksource and clockevent
features for the timer IP used in Intel Keem Bay SoC.
The timer block supports 1 free running counter and 8 timers.
The free running counter can be used as a clocksource and
the timers can be used as clockevent. Each timer is capable of
generating individual interrupt.
Both the features are enabled through the timer general config register.
Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
---
MAINTAINERS | 6 +
drivers/clocksource/Kconfig | 11 ++
drivers/clocksource/Makefile | 1 +
drivers/clocksource/timer-keembay.c | 226 ++++++++++++++++++++++++++++
4 files changed, 244 insertions(+)
create mode 100644 drivers/clocksource/timer-keembay.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 05fd080b82f3..90af9439d529 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9791,6 +9791,12 @@ F: drivers/crypto/keembay/keembay-ocs-hcu-core.c
F: drivers/crypto/keembay/ocs-hcu.c
F: drivers/crypto/keembay/ocs-hcu.h
+INTEL KEEM BAY TIMER DRIVER
+M: Shruthi Sanil <shruthi.sanil@intel.com>
+S: Maintained
+F: Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
+F: drivers/clocksource/timer-keembay.c
+
INTEL THUNDER BAY EMMC PHY DRIVER
M: Nandhini Srikandan <nandhini.srikandan@intel.com>
M: Rashmi A <rashmi.a@intel.com>
diff --git a/drivers/clocksource/Kconfig b/drivers/clocksource/Kconfig
index cfb8ea0df3b1..65b6cf916e5a 100644
--- a/drivers/clocksource/Kconfig
+++ b/drivers/clocksource/Kconfig
@@ -721,4 +721,15 @@ config MICROCHIP_PIT64B
modes and high resolution. It is used as a clocksource
and a clockevent.
+config KEEMBAY_TIMER
+ bool "Intel Keem Bay timer"
+ depends on ARCH_KEEMBAY || COMPILE_TEST
+ select TIMER_OF
+ help
+ This option enables the support for the Intel Keem Bay
+ general purpose timer and free running counter driver.
+ Each timer can generate an individual interrupt and
+ supports oneshot and periodic modes.
+ The 64-bit counter can be used as a clock source.
+
endmenu
diff --git a/drivers/clocksource/Makefile b/drivers/clocksource/Makefile
index fa5f624eadb6..dff6458ef9e5 100644
--- a/drivers/clocksource/Makefile
+++ b/drivers/clocksource/Makefile
@@ -89,3 +89,4 @@ obj-$(CONFIG_GX6605S_TIMER) += timer-gx6605s.o
obj-$(CONFIG_HYPERV_TIMER) += hyperv_timer.o
obj-$(CONFIG_MICROCHIP_PIT64B) += timer-microchip-pit64b.o
obj-$(CONFIG_MSC313E_TIMER) += timer-msc313e.o
+obj-$(CONFIG_KEEMBAY_TIMER) += timer-keembay.o
diff --git a/drivers/clocksource/timer-keembay.c b/drivers/clocksource/timer-keembay.c
new file mode 100644
index 000000000000..4cf3f6868964
--- /dev/null
+++ b/drivers/clocksource/timer-keembay.c
@@ -0,0 +1,226 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Intel Keem Bay Timer driver
+ *
+ * Copyright (C) 2020 Intel Corporation
+ */
+
+#include <linux/bitops.h>
+#include <linux/interrupt.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+
+#include "timer-of.h"
+
+/* Timer register offset */
+#define TIM_CNT_VAL_OFFSET 0x0
+#define TIM_RELOAD_VAL_OFFSET 0x4
+#define TIM_CONFIG_OFFSET 0x8
+
+/* Bit fields of timer general config register */
+#define TIM_CONFIG_PRESCALER_ENABLE BIT(2)
+#define TIM_CONFIG_COUNTER_ENABLE BIT(0)
+
+/* Bit fields of timer config register */
+#define TIM_CONFIG_INTERRUPT_PENDING BIT(4)
+#define TIM_CONFIG_INTERRUPT_ENABLE BIT(2)
+#define TIM_CONFIG_RESTART BIT(1)
+#define TIM_CONFIG_ENABLE BIT(0)
+
+#define TIM_GEN_MASK GENMASK(31, 12)
+#define TIM_RATING 200
+#define TIM_CLKSRC_MASK_BITS 64
+
+#define TIMER_NAME_SIZE 25
+
+static inline void keembay_timer_enable(void __iomem *base, u32 flags)
+{
+ writel(TIM_CONFIG_ENABLE | flags, base + TIM_CONFIG_OFFSET);
+}
+
+static inline void keembay_timer_disable(void __iomem *base)
+{
+ writel(0x0, base + TIM_CONFIG_OFFSET);
+}
+
+static inline void keembay_timer_update_counter(void __iomem *base, u32 val)
+{
+ writel(val, base + TIM_CNT_VAL_OFFSET);
+ writel(val, base + TIM_RELOAD_VAL_OFFSET);
+}
+
+static inline void keembay_timer_clear_pending_int(void __iomem *base)
+{
+ u32 val;
+
+ val = readl(base + TIM_CONFIG_OFFSET);
+ val &= ~TIM_CONFIG_INTERRUPT_PENDING;
+ writel(val, base + TIM_CONFIG_OFFSET);
+}
+
+static int keembay_timer_set_next_event(unsigned long evt, struct clock_event_device *ce)
+{
+ u32 flags = TIM_CONFIG_INTERRUPT_ENABLE;
+ struct timer_of *to = to_timer_of(ce);
+ void __iomem *tim_base = timer_of_base(to);
+
+ keembay_timer_disable(tim_base);
+ keembay_timer_update_counter(tim_base, evt);
+ keembay_timer_enable(tim_base, flags);
+
+ return 0;
+}
+
+static int keembay_timer_periodic(struct clock_event_device *ce)
+{
+ u32 flags = TIM_CONFIG_INTERRUPT_ENABLE | TIM_CONFIG_RESTART;
+ struct timer_of *to = to_timer_of(ce);
+ void __iomem *tim_base = timer_of_base(to);
+
+ keembay_timer_disable(tim_base);
+ keembay_timer_update_counter(tim_base, timer_of_period(to));
+ keembay_timer_enable(tim_base, flags);
+
+ return 0;
+}
+
+static int keembay_timer_shutdown(struct clock_event_device *ce)
+{
+ struct timer_of *to = to_timer_of(ce);
+
+ keembay_timer_disable(timer_of_base(to));
+
+ return 0;
+}
+
+static irqreturn_t keembay_timer_isr(int irq, void *dev_id)
+{
+ struct clock_event_device *evt = dev_id;
+ struct timer_of *to = to_timer_of(evt);
+ void __iomem *tim_base = timer_of_base(to);
+ u32 val;
+
+ val = readl(tim_base + TIM_CONFIG_OFFSET);
+
+ if (val & TIM_CONFIG_RESTART) {
+ /* Periodic Timer */
+ keembay_timer_clear_pending_int(tim_base);
+ } else {
+ /* One-Shot Timer */
+ keembay_timer_disable(tim_base);
+ }
+
+ evt->event_handler(evt);
+
+ return IRQ_HANDLED;
+}
+
+static struct timer_of keembay_ce_to = {
+ .flags = TIMER_OF_IRQ | TIMER_OF_BASE | TIMER_OF_CLOCK,
+ .clkevt = {
+ .name = "keembay_sys_clkevt",
+ .cpumask = cpu_possible_mask,
+ .features = CLOCK_EVT_FEAT_PERIODIC |
+ CLOCK_EVT_FEAT_ONESHOT |
+ CLOCK_EVT_FEAT_DYNIRQ,
+ .rating = TIM_RATING,
+ .set_next_event = keembay_timer_set_next_event,
+ .set_state_periodic = keembay_timer_periodic,
+ .set_state_shutdown = keembay_timer_shutdown,
+ },
+ .of_irq = {
+ .handler = keembay_timer_isr,
+ .flags = IRQF_TIMER,
+ },
+};
+
+static int __init keembay_clockevent_init(struct device_node *np)
+{
+ struct regmap *regmap;
+ int ret;
+ u32 val;
+
+ regmap = device_node_to_regmap(np->parent);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ ret = regmap_read(regmap, TIM_CONFIG_OFFSET, &val);
+ if (ret)
+ return ret;
+
+ /* Prescaler bit must be enabled for the timer to function */
+ if (!(val & TIM_CONFIG_PRESCALER_ENABLE)) {
+ pr_err(FW_BUG "%pOF: Prescaler is not enabled\n", np);
+ ret = -ENODEV;
+ }
+
+ ret = timer_of_init(np, &keembay_ce_to);
+ if (ret)
+ return ret;
+
+ ret = regmap_read(regmap, TIM_RELOAD_VAL_OFFSET, &val);
+ if (ret)
+ return ret;
+
+ keembay_ce_to.of_clk.rate = keembay_ce_to.of_clk.rate / (val + 1);
+
+ clockevents_config_and_register(&keembay_ce_to.clkevt,
+ timer_of_rate(&keembay_ce_to),
+ 1,
+ U32_MAX);
+
+ return 0;
+}
+
+static struct timer_of keembay_cs_to = {
+ .flags = TIMER_OF_BASE | TIMER_OF_CLOCK,
+};
+
+static u64 notrace keembay_clocksource_read(struct clocksource *cs)
+{
+ return lo_hi_readq(timer_of_base(&keembay_cs_to));
+}
+
+static struct clocksource keembay_counter = {
+ .name = "keembay_sys_counter",
+ .rating = TIM_RATING,
+ .read = keembay_clocksource_read,
+ .mask = CLOCKSOURCE_MASK(TIM_CLKSRC_MASK_BITS),
+ .flags = CLOCK_SOURCE_IS_CONTINUOUS |
+ CLOCK_SOURCE_SUSPEND_NONSTOP,
+};
+
+static int __init keembay_clocksource_init(struct device_node *np)
+{
+ struct regmap *regmap;
+ u32 val;
+ int ret;
+
+ regmap = device_node_to_regmap(np->parent);
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ ret = regmap_read(regmap, TIM_CONFIG_OFFSET, &val);
+ if (ret)
+ return ret;
+
+ /* Free Running Counter bit must be enabled for counter to function */
+ if (!(val & TIM_CONFIG_COUNTER_ENABLE)) {
+ pr_err(FW_BUG "%pOF: free running counter is not enabled\n", np);
+ return -ENODEV;
+ }
+
+ ret = timer_of_init(np, &keembay_cs_to);
+ if (ret)
+ return ret;
+
+ return clocksource_register_hz(&keembay_counter, timer_of_rate(&keembay_cs_to));
+}
+
+TIMER_OF_DECLARE(keembay_clockevent, "intel,keembay-timer", keembay_clockevent_init);
+TIMER_OF_DECLARE(keembay_clocksource, "intel,keembay-counter", keembay_clocksource_init);
--
2.17.1
^ permalink raw reply related [flat|nested] 9+ messages in thread
* RE: [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block
2022-03-22 13:00 [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block shruthi.sanil
2022-03-22 13:00 ` [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer shruthi.sanil
2022-03-22 13:00 ` [PATCH v10 2/2] clocksource: Add Intel Keem Bay timer support shruthi.sanil
@ 2022-03-30 5:04 ` Sanil, Shruthi
2022-03-30 8:59 ` andriy.shevchenko
2 siblings, 1 reply; 9+ messages in thread
From: Sanil, Shruthi @ 2022-03-30 5:04 UTC (permalink / raw)
To: daniel.lezcano, tglx, robh+dt, linux-kernel, devicetree
Cc: andriy.shevchenko, mgross, Thokala, Srikanth, Raja Subramanian,
Lakshmi Bai, Sangannavar, Mallikarjunappa
Gentle Reminder!
Regards,
Shruthi
> -----Original Message-----
> From: Sanil, Shruthi <shruthi.sanil@intel.com>
> Sent: Tuesday, March 22, 2022 6:30 PM
> To: daniel.lezcano@linaro.org; tglx@linutronix.de; robh+dt@kernel.org;
> linux-kernel@vger.kernel.org; devicetree@vger.kernel.org
> Cc: andriy.shevchenko@linux.intel.com; mgross@linux.intel.com; Thokala,
> Srikanth <srikanth.thokala@intel.com>; Raja Subramanian, Lakshmi Bai
> <lakshmi.bai.raja.subramanian@intel.com>; Sangannavar, Mallikarjunappa
> <mallikarjunappa.sangannavar@intel.com>; Sanil, Shruthi
> <shruthi.sanil@intel.com>
> Subject: [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block
>
> From: Shruthi Sanil <shruthi.sanil@intel.com>
>
> The timer block supports 1 64-bit free running counter and 8 32-bit general
> purpose timers.
>
> Patch 1 holds the device tree binding documentation.
> Patch 2 holds the device driver.
>
> This driver is tested on the Keem Bay evaluation module board.
>
> Changes since v9:
> - Updated the error message with the macro FW_BUG wherever applicable.
>
> Changes since v8:
> - The clockevent stucture has been declared as a global static variable,
> rather than allocating memory using kzalloc during probing.
> - Updated the print statement indicating the configuration missing as the FW
> Bug.
> - Updated the comments in the function keembay_timer_isr().
> - Updated the dt-binding to remove 'oneOf' as there is only 1 entry.
> - Updated the dt-binding description clearly indicating that
> the descrption is about the undelying HW.
>
> Changes since v7:
> - Added back the compatible string "intel,keembay-gpt-creg"
> as an enum to the mfd device node in the device tree bindings.
> - As the timer is used as a broadcast timer during CPU idle,
> only one timer is needed. Hence updated the driver accordingly
> incorporating the review comments.
>
> Changes since v6:
> - Removed the unused compatible string from the mfd device node
> to fix the error thrown by the make dt-binding command.
>
> Changes since v5:
> - Created a MFD device for the common configuration register
> in the device tree bindings.
> - Updated the timer driver with the MFD framework to access the
> common configuration register.
>
> Changes since v4:
> - Updated the description in the device tree bindings.
> - Updated the unit address of all the timers and counter
> in the device tree binding.
>
> Changes since v3:
> - Update in KConfig file to support COMPILE_TEST for Keem Bay timer.
> - Update in device tree bindings to remove status field.
> - Update in device tree bindings to remove 64-bit address space for
> the child nodes by using non-empty ranges.
>
> Changes since v2:
> - Add multi timer support.
> - Update in the device tree binding to support multi timers.
> - Code optimization.
>
> Changes since v1:
> - Add support for KEEMBAY_TIMER to get selected through
> Kconfig.platforms.
> - Add CLOCK_EVT_FEAT_DYNIRQ as part of clockevent feature.
> - Avoid overlapping reg regions across 2 device nodes.
> - Simplify 2 device nodes as 1 because both are from same IP block.
> - Adapt the driver code according to the new simplified devicetree.
>
> Shruthi Sanil (2):
> dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
> clocksource: Add Intel Keem Bay timer support
>
> .../bindings/timer/intel,keembay-timer.yaml | 125 ++++++++++
> MAINTAINERS | 6 +
> drivers/clocksource/Kconfig | 11 +
> drivers/clocksource/Makefile | 1 +
> drivers/clocksource/timer-keembay.c | 226 ++++++++++++++++++
> 5 files changed, 369 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
> create mode 100644 drivers/clocksource/timer-keembay.c
>
>
> base-commit: ffb217a13a2eaf6d5bd974fc83036a53ca69f1e2
> --
> 2.17.1
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block
2022-03-30 5:04 ` [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block Sanil, Shruthi
@ 2022-03-30 8:59 ` andriy.shevchenko
0 siblings, 0 replies; 9+ messages in thread
From: andriy.shevchenko @ 2022-03-30 8:59 UTC (permalink / raw)
To: Sanil, Shruthi
Cc: daniel.lezcano, tglx, robh+dt, linux-kernel, devicetree, mgross,
Thokala, Srikanth, Raja Subramanian, Lakshmi Bai, Sangannavar,
Mallikarjunappa
On Wed, Mar 30, 2022 at 05:04:01AM +0000, Sanil, Shruthi wrote:
> Gentle Reminder!
It's a merge window time. Be patient!
Also, please avoid top-posting.
> > From: Sanil, Shruthi <shruthi.sanil@intel.com>
> > Sent: Tuesday, March 22, 2022 6:30 PM
--
With Best Regards,
Andy Shevchenko
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
2022-03-22 13:00 ` [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer shruthi.sanil
@ 2022-03-30 11:44 ` Daniel Lezcano
2022-03-30 11:55 ` Krzysztof Kozlowski
0 siblings, 1 reply; 9+ messages in thread
From: Daniel Lezcano @ 2022-03-30 11:44 UTC (permalink / raw)
To: shruthi.sanil, tglx, robh+dt, linux-kernel, devicetree,
Krzysztof Kozlowski
Cc: andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar
On 22/03/2022 14:00, shruthi.sanil@intel.com wrote:
> From: Shruthi Sanil <shruthi.sanil@intel.com>
>
> Add Device Tree bindings for the Timer IP, which can be used as
> clocksource and clockevent device in the Intel Keem Bay SoC.
>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
In order to pick this binding I need an ack from Rob or Krzysztof (added
to the recipients)
> ---
> .../bindings/timer/intel,keembay-timer.yaml | 125 ++++++++++++++++++
> 1 file changed, 125 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
>
> diff --git a/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml b/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
> new file mode 100644
> index 000000000000..333f137e39e0
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/timer/intel,keembay-timer.yaml
> @@ -0,0 +1,125 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/timer/intel,keembay-timer.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Intel Keem Bay SoC Timers
> +
> +maintainers:
> + - Shruthi Sanil <shruthi.sanil@intel.com>
> +
> +description: |
> + The Intel Keem Bay timer IP supports 1 free running counter and 8 timers.
> + Each timer is capable of generating inividual interrupt.
> + Both the features are enabled through the timer general config register.
> +
> + The parent node represents the common general configuration details and
> + the child nodes represents the counter and timers.
> +
> +properties:
> + compatible:
> + items:
> + - enum:
> + - intel,keembay-gpt-creg
> + - const: simple-mfd
> +
> + reg:
> + description: General configuration register address and length.
> + maxItems: 1
> +
> + ranges: true
> +
> + "#address-cells":
> + const: 1
> +
> + "#size-cells":
> + const: 1
> +
> +required:
> + - compatible
> + - reg
> + - ranges
> + - "#address-cells"
> + - "#size-cells"
> +
> +patternProperties:
> + "^counter@[0-9a-f]+$":
> + description: Properties for Intel Keem Bay counter.
> + type: object
> + properties:
> + compatible:
> + items:
> + - enum:
> + - intel,keembay-counter
> +
> + reg:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + required:
> + - compatible
> + - reg
> + - clocks
> +
> + "^timer@[0-9a-f]+$":
> + description: Properties for Intel Keem Bay timer
> + type: object
> + properties:
> + compatible:
> + items:
> + - enum:
> + - intel,keembay-timer
> +
> + reg:
> + maxItems: 1
> +
> + interrupts:
> + maxItems: 1
> +
> + clocks:
> + maxItems: 1
> +
> + required:
> + - compatible
> + - reg
> + - interrupts
> + - clocks
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #define KEEM_BAY_A53_TIM
> +
> + soc {
> + #address-cells = <0x2>;
> + #size-cells = <0x2>;
> +
> + gpt@20331000 {
> + compatible = "intel,keembay-gpt-creg", "simple-mfd";
> + reg = <0x0 0x20331000 0x0 0xc>;
> + ranges = <0x0 0x0 0x20330000 0xF0>;
> + #address-cells = <0x1>;
> + #size-cells = <0x1>;
> +
> + counter@e8 {
> + compatible = "intel,keembay-counter";
> + reg = <0xe8 0x8>;
> + clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
> + };
> +
> + timer@30 {
> + compatible = "intel,keembay-timer";
> + reg = <0x30 0xc>;
> + interrupts = <GIC_SPI 0x5 IRQ_TYPE_LEVEL_HIGH>;
> + clocks = <&scmi_clk KEEM_BAY_A53_TIM>;
> + };
> + };
> + };
> +
> +...
--
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
2022-03-30 11:44 ` Daniel Lezcano
@ 2022-03-30 11:55 ` Krzysztof Kozlowski
2022-04-06 8:06 ` Daniel Lezcano
0 siblings, 1 reply; 9+ messages in thread
From: Krzysztof Kozlowski @ 2022-03-30 11:55 UTC (permalink / raw)
To: Daniel Lezcano, shruthi.sanil, tglx, robh+dt, linux-kernel, devicetree
Cc: andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar
On 30/03/2022 13:44, Daniel Lezcano wrote:
> On 22/03/2022 14:00, shruthi.sanil@intel.com wrote:
>> From: Shruthi Sanil <shruthi.sanil@intel.com>
>>
>> Add Device Tree bindings for the Timer IP, which can be used as
>> clocksource and clockevent device in the Intel Keem Bay SoC.
>>
>> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
>> Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
>
>
> In order to pick this binding I need an ack from Rob or Krzysztof (added
> to the recipients)
Rob was looking into this and there were some comments around v8, so I
will leave it to him.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
2022-03-30 11:55 ` Krzysztof Kozlowski
@ 2022-04-06 8:06 ` Daniel Lezcano
2022-04-06 15:13 ` Rob Herring
0 siblings, 1 reply; 9+ messages in thread
From: Daniel Lezcano @ 2022-04-06 8:06 UTC (permalink / raw)
To: Krzysztof Kozlowski, shruthi.sanil, tglx, robh+dt, linux-kernel,
devicetree
Cc: andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar
Hi Rob,
On 30/03/2022 13:55, Krzysztof Kozlowski wrote:
> On 30/03/2022 13:44, Daniel Lezcano wrote:
>> On 22/03/2022 14:00, shruthi.sanil@intel.com wrote:
>>> From: Shruthi Sanil <shruthi.sanil@intel.com>
>>>
>>> Add Device Tree bindings for the Timer IP, which can be used as
>>> clocksource and clockevent device in the Intel Keem Bay SoC.
>>>
>>> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
>>> Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
>>
>>
>> In order to pick this binding I need an ack from Rob or Krzysztof (added
>> to the recipients)
>
> Rob was looking into this and there were some comments around v8, so I
> will leave it to him.
whenever possible could you review this patch, so I can merge the series
which has been a long on the mailing list ?
Thanks
-- Daniel
--
<http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs
Follow Linaro: <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer
2022-04-06 8:06 ` Daniel Lezcano
@ 2022-04-06 15:13 ` Rob Herring
0 siblings, 0 replies; 9+ messages in thread
From: Rob Herring @ 2022-04-06 15:13 UTC (permalink / raw)
To: Daniel Lezcano
Cc: Krzysztof Kozlowski, shruthi.sanil, tglx, linux-kernel,
devicetree, andriy.shevchenko, mgross, srikanth.thokala,
lakshmi.bai.raja.subramanian, mallikarjunappa.sangannavar
On Wed, Apr 06, 2022 at 10:06:00AM +0200, Daniel Lezcano wrote:
>
> Hi Rob,
>
> On 30/03/2022 13:55, Krzysztof Kozlowski wrote:
> > On 30/03/2022 13:44, Daniel Lezcano wrote:
> > > On 22/03/2022 14:00, shruthi.sanil@intel.com wrote:
> > > > From: Shruthi Sanil <shruthi.sanil@intel.com>
> > > >
> > > > Add Device Tree bindings for the Timer IP, which can be used as
> > > > clocksource and clockevent device in the Intel Keem Bay SoC.
> > > >
> > > > Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com>
> > > > Signed-off-by: Shruthi Sanil <shruthi.sanil@intel.com>
> > >
> > >
> > > In order to pick this binding I need an ack from Rob or Krzysztof (added
> > > to the recipients)
> >
> > Rob was looking into this and there were some comments around v8, so I
> > will leave it to him.
>
> whenever possible could you review this patch, so I can merge the series
> which has been a long on the mailing list ?
I did... Multiple times.
I don't see any need for 1 node per counter. I don't find 'it might be
synthesized with a different number of counters' a convincing argument.
Rob
^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2022-04-06 17:16 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-03-22 13:00 [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block shruthi.sanil
2022-03-22 13:00 ` [PATCH v10 1/2] dt-bindings: timer: Add bindings for Intel Keem Bay SoC Timer shruthi.sanil
2022-03-30 11:44 ` Daniel Lezcano
2022-03-30 11:55 ` Krzysztof Kozlowski
2022-04-06 8:06 ` Daniel Lezcano
2022-04-06 15:13 ` Rob Herring
2022-03-22 13:00 ` [PATCH v10 2/2] clocksource: Add Intel Keem Bay timer support shruthi.sanil
2022-03-30 5:04 ` [PATCH v10 0/2] Add the driver for Intel Keem Bay SoC timer block Sanil, Shruthi
2022-03-30 8:59 ` andriy.shevchenko
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