* [PATCH v10 0/7] devfreq: Add devfreq-event class to provide raw data for devfreq device
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patchset add new devfreq_event class to provide raw data to determine
current utilization of device which is used for devfreq governor.
The following description explains the feature of two kind of devfreq class:
- devfreq class (existing)
: devfreq consumer device use raw data from devfreq_event device for
determining proper current system state and change voltage/frequency
dynamically using various governors.
- devfreq_event class (new)
: Provide measured raw data to devfreq device for governor
Changelog:
Changes from v9:
(https://lkml.org/lkml/2015/1/20/68)
- Fix the operation of enable_count in devfreq_event_{enable|disable}_edev().
Changes from v8:
(https://lkml.org/lkml/2015/1/12/299)
- Fix issue of devfreq-event.c driver by Myunjoo's comment
: Merge patch2 (resource-managed function) with patch1
: Fix bug in devfreq_event_{enable|disable}_edev() about enable_count operation
: Simplify error checking code in devfreq_event_get_event()
: Define devfreq_event_get_drvdata() as static inline function type
: Reduce the time of critical section scope in devfreq_event_remove_edev()
: Rename field name of devfreq_event_data structure
(total_event / event -> total_count / load_count)
- Drop following patch[1] because Exynos5260 cannot be tested for exynos-ppmu.c driver
[1] [PATCHv8 7/9] ARM: dts: Add PPMU dt node for Exynos5260 SoC
- https://lkml.org/lkml/2015/1/12/301
- Clean-up exynos-ppmu.c without update
Changes from v7:
(https://lkml.org/lkml/2015/1/7/795)
- Use EXPORT_SYMBOL_GPL macro instead of EXPORT_SYMBOL
- Fix the binding document of exynos-ppmu.c driver
- Drop the devfreq-event type patch because it isnt' clear
- Fix bug of devfreq_event_add_edev() when fail to execute device_register()
- Modify resource free operation on following functions:
: devfreq_event_remove_edev()
: devfreq_event_release_edev()
Changes from v6:
(https://lkml.org/lkml/2014/12/28/139)
- This patchset is based on v3.19-rc3.
1. devfreq-event class driver
- Fix build break if devfreq-event framework is off
- Add resource-managed function for devfreq-event device
: devm_devfreq_event_add_edev()
: devm_devfreq_event_remove_edev()
Changes from v5:
(https://lkml.org/lkml/2014/12/22/527)
- Rebase these patch-set on v3.19-rc1 and Test it.
1. exynos-ppmu.c
- Change the error value when of_iomap() fail to map the memory
- Remove owner setting of platform_driver
- Add exynos_ppmu_disable() function
2. exynos dts file
- Add PPMU node to Exynos3250-based Monk board
- Remove ppmu_cpu node on Exynos4412-based TRATS2 board and add ppmu_leftbus/rightbus node
Changes from v4:
(https://lkml.org/lkml/2014/12/16/511)
1. devfreq-event class driver
- Add devfreq_event_get_edev_count() function
- Modify the simple description of devfreq-event framework in devfreq-event.c
- Minimize the usage range of global lock usage in devfreq_event_add_edev()
- Remove '_is_enabled()' function pointer in devfreq_event_ops structure
- Add separte CONFIG_PM_DEVFREQ_EVENT configuration
- Add new devfreq-event.h header file including devfreq-event helper functions
2. exynos dts file
- Add new patch to support PPMU with DEVFREQ-event on Exynos4412-based TRATS2
Changes from v3:
(https://lkml.org/lkml/2014/12/12/219)
1. devfreq-event class driver
- Fix return value of devfreq_event_get_event()
- Add new structure devfreq_event_data for devfreq_event_get_event()
- Modify the prototype of devfreq_event_get_event() function
- Call of_node_put after calling of_parse_phandle() to decrement refcount
2. exynos-ppmu driver
- Modify usage of devfreq_event_get_event() function
according to new prototype of this funciton
- Add the additional description to exynos-ppmu.txt how to add PPMU node
in board dts file
- Use 'PPMU_EVENT' macro to remove duplicate codes
- Add the support of PPMU for Exynos5260
3. exynos dts file
- Add missing PPMU_FSYS node to exynos3250.dtsi
- Fix 'ppmu_mfc_l' node name as 'ppmu_mfc' because exynos3250 has only one MFC IP.
- Add missing PPMU_ACP/G3D to exynos4.dtsi
4. etc
- Fix wrong abbreviation of PPMU (PPMU :Platform Performance Monitoring Unit)
- Add new patch to support the PPMU of Exynos5260 SoC
Changes from v2:
(https://lkml.org/lkml/2014/12/9/304)
1. devfreq-event class driver
- Rename all the helper functions of devfreq-event device
- Add devfreq_event_remove_edev() instead of devfreq_put_event_dev()
- Add devfreq_event_release_edev() to initialize it before put device
- Add the detailed description of devfreq-event API
- Add the attributes of devfreq-event class (enable_count)
- Check the overflow about event/total_event data in devfreq_event_get_event()
- Remove the 'exclusive flag' feature
- Set set_event()/get_event() functions as mandary
- Add missing of_node_put() call
- Change variable type of 'get_event()' funciton from 'int' to 'u64'
2. exynos-ppmu driver
- Remove un-used field (struct devfreq)
- Use 'of_get_child_by_name()' instead of 'of_find_node_by_name()'
- Add missing of_node_put() call
- Fix wrong clock control
- Use devfreq_event_remove_edev() instead of devfreq_remove_device()
- Add the documentation for exynos-ppmu driver
- Remove 'enable/disable/is_enabled/reset' function of exynos-ppmu driver
3. exynos3250-rinato.dts
- Add ppmu_{leftbus|rightbus} dt node and remove ppmu_cpu dt node
Changes from v1:
(https://lkml.org/lkml/2014/9/5/11)
- Code clean
- Add the description of devfreq-event structure
- Add 'is_enabled' function to devfreq_event_ops structure
- Add 'enable_count' field to devfreq_event_dev structure
- Check whether devfreq-event device is enabled or not
during calling devfreq_event API
- Define the type of devfreq-event device as following
: DEVFREQ_EVENT_TYPE_RAW_DATA
: DEVFREQ_EVENT_TYPE_UTILIZATION
: DEVFREQ_EVENT_TYPE_BANDWIDTH
: DEVFREQ_EVENT_TYPE_LATENCY
- Add the exclusive feature of devfreq-event device.
If devfreq-event device is used on only on devfreq driver,
should used 'devfreq_enable_event_dev_exclusive()' function
- Add new patch6 for test on Exynos3250-based Rinato board
Chanwoo Choi (7):
devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
devfreq: event: Add exynos-ppmu devfreq-event driver
devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
ARM: dts: Add PPMU dt node for Exynos3250 SoC
ARM: dts: Add PPMU dt node for Exynos4 SoCs
ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board
ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board
.../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++
arch/arm/boot/dts/exynos3250-monk.dts | 40 ++
arch/arm/boot/dts/exynos3250-rinato.dts | 40 ++
arch/arm/boot/dts/exynos3250.dtsi | 74 +++
arch/arm/boot/dts/exynos4.dtsi | 108 +++++
arch/arm/boot/dts/exynos4210.dtsi | 8 +
arch/arm/boot/dts/exynos4412-trats2.dts | 40 ++
drivers/devfreq/Kconfig | 2 +
drivers/devfreq/Makefile | 6 +-
drivers/devfreq/devfreq-event.c | 494 +++++++++++++++++++++
drivers/devfreq/event/Kconfig | 25 ++
drivers/devfreq/event/Makefile | 2 +
drivers/devfreq/event/exynos-ppmu.c | 374 ++++++++++++++++
drivers/devfreq/event/exynos-ppmu.h | 93 ++++
include/linux/devfreq-event.h | 196 ++++++++
15 files changed, 1611 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
create mode 100644 drivers/devfreq/devfreq-event.c
create mode 100644 drivers/devfreq/event/Kconfig
create mode 100644 drivers/devfreq/event/Makefile
create mode 100644 drivers/devfreq/event/exynos-ppmu.c
create mode 100644 drivers/devfreq/event/exynos-ppmu.h
create mode 100644 include/linux/devfreq-event.h
--
1.8.5.5
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH v10 0/7] devfreq: Add devfreq-event class to provide raw data for devfreq device
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patchset add new devfreq_event class to provide raw data to determine
current utilization of device which is used for devfreq governor.
The following description explains the feature of two kind of devfreq class:
- devfreq class (existing)
: devfreq consumer device use raw data from devfreq_event device for
determining proper current system state and change voltage/frequency
dynamically using various governors.
- devfreq_event class (new)
: Provide measured raw data to devfreq device for governor
Changelog:
Changes from v9:
(https://lkml.org/lkml/2015/1/20/68)
- Fix the operation of enable_count in devfreq_event_{enable|disable}_edev().
Changes from v8:
(https://lkml.org/lkml/2015/1/12/299)
- Fix issue of devfreq-event.c driver by Myunjoo's comment
: Merge patch2 (resource-managed function) with patch1
: Fix bug in devfreq_event_{enable|disable}_edev() about enable_count operation
: Simplify error checking code in devfreq_event_get_event()
: Define devfreq_event_get_drvdata() as static inline function type
: Reduce the time of critical section scope in devfreq_event_remove_edev()
: Rename field name of devfreq_event_data structure
(total_event / event -> total_count / load_count)
- Drop following patch[1] because Exynos5260 cannot be tested for exynos-ppmu.c driver
[1] [PATCHv8 7/9] ARM: dts: Add PPMU dt node for Exynos5260 SoC
- https://lkml.org/lkml/2015/1/12/301
- Clean-up exynos-ppmu.c without update
Changes from v7:
(https://lkml.org/lkml/2015/1/7/795)
- Use EXPORT_SYMBOL_GPL macro instead of EXPORT_SYMBOL
- Fix the binding document of exynos-ppmu.c driver
- Drop the devfreq-event type patch because it isnt' clear
- Fix bug of devfreq_event_add_edev() when fail to execute device_register()
- Modify resource free operation on following functions:
: devfreq_event_remove_edev()
: devfreq_event_release_edev()
Changes from v6:
(https://lkml.org/lkml/2014/12/28/139)
- This patchset is based on v3.19-rc3.
1. devfreq-event class driver
- Fix build break if devfreq-event framework is off
- Add resource-managed function for devfreq-event device
: devm_devfreq_event_add_edev()
: devm_devfreq_event_remove_edev()
Changes from v5:
(https://lkml.org/lkml/2014/12/22/527)
- Rebase these patch-set on v3.19-rc1 and Test it.
1. exynos-ppmu.c
- Change the error value when of_iomap() fail to map the memory
- Remove owner setting of platform_driver
- Add exynos_ppmu_disable() function
2. exynos dts file
- Add PPMU node to Exynos3250-based Monk board
- Remove ppmu_cpu node on Exynos4412-based TRATS2 board and add ppmu_leftbus/rightbus node
Changes from v4:
(https://lkml.org/lkml/2014/12/16/511)
1. devfreq-event class driver
- Add devfreq_event_get_edev_count() function
- Modify the simple description of devfreq-event framework in devfreq-event.c
- Minimize the usage range of global lock usage in devfreq_event_add_edev()
- Remove '_is_enabled()' function pointer in devfreq_event_ops structure
- Add separte CONFIG_PM_DEVFREQ_EVENT configuration
- Add new devfreq-event.h header file including devfreq-event helper functions
2. exynos dts file
- Add new patch to support PPMU with DEVFREQ-event on Exynos4412-based TRATS2
Changes from v3:
(https://lkml.org/lkml/2014/12/12/219)
1. devfreq-event class driver
- Fix return value of devfreq_event_get_event()
- Add new structure devfreq_event_data for devfreq_event_get_event()
- Modify the prototype of devfreq_event_get_event() function
- Call of_node_put after calling of_parse_phandle() to decrement refcount
2. exynos-ppmu driver
- Modify usage of devfreq_event_get_event() function
according to new prototype of this funciton
- Add the additional description to exynos-ppmu.txt how to add PPMU node
in board dts file
- Use 'PPMU_EVENT' macro to remove duplicate codes
- Add the support of PPMU for Exynos5260
3. exynos dts file
- Add missing PPMU_FSYS node to exynos3250.dtsi
- Fix 'ppmu_mfc_l' node name as 'ppmu_mfc' because exynos3250 has only one MFC IP.
- Add missing PPMU_ACP/G3D to exynos4.dtsi
4. etc
- Fix wrong abbreviation of PPMU (PPMU :Platform Performance Monitoring Unit)
- Add new patch to support the PPMU of Exynos5260 SoC
Changes from v2:
(https://lkml.org/lkml/2014/12/9/304)
1. devfreq-event class driver
- Rename all the helper functions of devfreq-event device
- Add devfreq_event_remove_edev() instead of devfreq_put_event_dev()
- Add devfreq_event_release_edev() to initialize it before put device
- Add the detailed description of devfreq-event API
- Add the attributes of devfreq-event class (enable_count)
- Check the overflow about event/total_event data in devfreq_event_get_event()
- Remove the 'exclusive flag' feature
- Set set_event()/get_event() functions as mandary
- Add missing of_node_put() call
- Change variable type of 'get_event()' funciton from 'int' to 'u64'
2. exynos-ppmu driver
- Remove un-used field (struct devfreq)
- Use 'of_get_child_by_name()' instead of 'of_find_node_by_name()'
- Add missing of_node_put() call
- Fix wrong clock control
- Use devfreq_event_remove_edev() instead of devfreq_remove_device()
- Add the documentation for exynos-ppmu driver
- Remove 'enable/disable/is_enabled/reset' function of exynos-ppmu driver
3. exynos3250-rinato.dts
- Add ppmu_{leftbus|rightbus} dt node and remove ppmu_cpu dt node
Changes from v1:
(https://lkml.org/lkml/2014/9/5/11)
- Code clean
- Add the description of devfreq-event structure
- Add 'is_enabled' function to devfreq_event_ops structure
- Add 'enable_count' field to devfreq_event_dev structure
- Check whether devfreq-event device is enabled or not
during calling devfreq_event API
- Define the type of devfreq-event device as following
: DEVFREQ_EVENT_TYPE_RAW_DATA
: DEVFREQ_EVENT_TYPE_UTILIZATION
: DEVFREQ_EVENT_TYPE_BANDWIDTH
: DEVFREQ_EVENT_TYPE_LATENCY
- Add the exclusive feature of devfreq-event device.
If devfreq-event device is used on only on devfreq driver,
should used 'devfreq_enable_event_dev_exclusive()' function
- Add new patch6 for test on Exynos3250-based Rinato board
Chanwoo Choi (7):
devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
devfreq: event: Add exynos-ppmu devfreq-event driver
devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
ARM: dts: Add PPMU dt node for Exynos3250 SoC
ARM: dts: Add PPMU dt node for Exynos4 SoCs
ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board
ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board
.../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++
arch/arm/boot/dts/exynos3250-monk.dts | 40 ++
arch/arm/boot/dts/exynos3250-rinato.dts | 40 ++
arch/arm/boot/dts/exynos3250.dtsi | 74 +++
arch/arm/boot/dts/exynos4.dtsi | 108 +++++
arch/arm/boot/dts/exynos4210.dtsi | 8 +
arch/arm/boot/dts/exynos4412-trats2.dts | 40 ++
drivers/devfreq/Kconfig | 2 +
drivers/devfreq/Makefile | 6 +-
drivers/devfreq/devfreq-event.c | 494 +++++++++++++++++++++
drivers/devfreq/event/Kconfig | 25 ++
drivers/devfreq/event/Makefile | 2 +
drivers/devfreq/event/exynos-ppmu.c | 374 ++++++++++++++++
drivers/devfreq/event/exynos-ppmu.h | 93 ++++
include/linux/devfreq-event.h | 196 ++++++++
15 files changed, 1611 insertions(+), 1 deletion(-)
create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
create mode 100644 drivers/devfreq/devfreq-event.c
create mode 100644 drivers/devfreq/event/Kconfig
create mode 100644 drivers/devfreq/event/Makefile
create mode 100644 drivers/devfreq/event/exynos-ppmu.c
create mode 100644 drivers/devfreq/event/exynos-ppmu.h
create mode 100644 include/linux/devfreq-event.h
--
1.8.5.5
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH v10 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch add new devfreq_event class for devfreq_event device which provide
raw data (e.g., memory bus utilization/GPU utilization). This raw data from
devfreq_event data would be used for the governor of devfreq subsystem.
- devfreq_event device : Provide raw data for governor of existing devfreq device
- devfreq device : Monitor device state and change frequency/voltage of device
using the raw data from devfreq_event device
The devfreq subsystem support generic DVFS(Dynamic Voltage/Frequency Scaling)
for Non-CPU Devices. The devfreq device would dertermine current device state
using various governor (e.g., ondemand, performance, powersave). After completed
determination of system state, devfreq device would change the frequency/voltage
of devfreq device according to the result of governor.
But, devfreq governor must need basic data which indicates current device state.
Existing devfreq subsystem only consider devfreq device which check current system
state and determine proper system state using basic data. There is no subsystem
for device providing basic data to devfreq device.
The devfreq subsystem must need devfreq_event device(data-provider device) for
existing devfreq device. So, this patch add new devfreq_event class for
devfreq_event device which read various basic data(e.g, memory bus utilization,
GPU utilization) and provide measured data to existing devfreq device through
standard APIs of devfreq_event class.
The following description explains the feature of two kind of devfreq class:
- devfreq class (existing)
: devfreq consumer device use raw data from devfreq_event device for
determining proper current system state and change voltage/frequency
dynamically using various governors.
- devfreq_event class (new)
: Provide measured raw data to devfreq device for governor
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
drivers/devfreq/Kconfig | 2 +
drivers/devfreq/Makefile | 6 +-
drivers/devfreq/devfreq-event.c | 494 ++++++++++++++++++++++++++++++++++++++++
drivers/devfreq/event/Kconfig | 16 ++
drivers/devfreq/event/Makefile | 1 +
include/linux/devfreq-event.h | 196 ++++++++++++++++
6 files changed, 714 insertions(+), 1 deletion(-)
create mode 100644 drivers/devfreq/devfreq-event.c
create mode 100644 drivers/devfreq/event/Kconfig
create mode 100644 drivers/devfreq/event/Makefile
create mode 100644 include/linux/devfreq-event.h
diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index faf4e70..21f8f17 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -87,4 +87,6 @@ config ARM_EXYNOS5_BUS_DEVFREQ
It reads PPMU counters of memory controllers and adjusts the
operating frequencies and voltages with OPP support.
+source "drivers/devfreq/event/Kconfig"
+
endif # PM_DEVFREQ
diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
index 16138c9..c449336 100644
--- a/drivers/devfreq/Makefile
+++ b/drivers/devfreq/Makefile
@@ -1,4 +1,5 @@
-obj-$(CONFIG_PM_DEVFREQ) += devfreq.o
+obj-$(CONFIG_PM_DEVFREQ) += devfreq.o
+obj-$(CONFIG_PM_DEVFREQ_EVENT) += devfreq-event.o
obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o
obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o
obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o
@@ -7,3 +8,6 @@ obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o
# DEVFREQ Drivers
obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ) += exynos/
obj-$(CONFIG_ARM_EXYNOS5_BUS_DEVFREQ) += exynos/
+
+# DEVFREQ Event Drivers
+obj-$(CONFIG_PM_DEVFREQ_EVENT) += event/
diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c
new file mode 100644
index 0000000..f304a02
--- /dev/null
+++ b/drivers/devfreq/devfreq-event.c
@@ -0,0 +1,494 @@
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/devfreq.c.
+ */
+
+#include <linux/devfreq-event.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/of.h>
+
+static struct class *devfreq_event_class;
+
+/* The list of all devfreq event list */
+static LIST_HEAD(devfreq_event_list);
+static DEFINE_MUTEX(devfreq_event_list_lock);
+
+#define to_devfreq_event(DEV) container_of(DEV, struct devfreq_event_dev, dev)
+
+/**
+ * devfreq_event_enable_edev() - Enable the devfreq-event dev and increase
+ * the enable_count of devfreq-event dev.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function increase the enable_count and enable the
+ * devfreq-event device. The devfreq-event device should be enabled before
+ * using it by devfreq device.
+ */
+int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+ int ret = 0;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ mutex_lock(&edev->lock);
+ if (edev->desc->ops && edev->desc->ops->enable
+ && edev->enable_count == 0) {
+ ret = edev->desc->ops->enable(edev);
+ if (ret < 0)
+ goto err;
+ }
+ edev->enable_count++;
+err:
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_enable_edev);
+
+/**
+ * devfreq_event_disable_edev() - Disable the devfreq-event dev and decrease
+ * the enable_count of the devfreq-event dev.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function decrease the enable_count and disable the
+ * devfreq-event device. After the devfreq-event device is disabled,
+ * devfreq device can't use the devfreq-event device for get/set/reset
+ * operations.
+ */
+int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+ int ret = 0;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ mutex_lock(&edev->lock);
+ if (edev->enable_count <= 0) {
+ dev_warn(&edev->dev, "unbalanced enable_count\n");
+ ret = -EIO;
+ goto err;
+ }
+
+ if (edev->desc->ops && edev->desc->ops->disable
+ && edev->enable_count == 1) {
+ ret = edev->desc->ops->disable(edev);
+ if (ret < 0)
+ goto err;
+ }
+ edev->enable_count--;
+err:
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_disable_edev);
+
+/**
+ * devfreq_event_is_enabled() - Check whether devfreq-event dev is enabled or
+ * not.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function check whether devfreq-event dev is enabled or not.
+ * If return true, the devfreq-event dev is enabeld. If return false, the
+ * devfreq-event dev is disabled.
+ */
+bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+ bool enabled = false;
+
+ if (!edev || !edev->desc)
+ return enabled;
+
+ mutex_lock(&edev->lock);
+
+ if (edev->enable_count > 0)
+ enabled = true;
+
+ mutex_unlock(&edev->lock);
+
+ return enabled;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_is_enabled);
+
+/**
+ * devfreq_event_set_event() - Set event to devfreq-event dev to start.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function set the event to the devfreq-event device to start
+ * for getting the event data which could be various event type.
+ */
+int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+ int ret;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ if (!edev->desc->ops || !edev->desc->ops->set_event)
+ return -EINVAL;
+
+ if (!devfreq_event_is_enabled(edev))
+ return -EPERM;
+
+ mutex_lock(&edev->lock);
+ ret = edev->desc->ops->set_event(edev);
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_set_event);
+
+/**
+ * devfreq_event_get_event() - Get {load|total}_count from devfreq-event dev.
+ * @edev : the devfreq-event device
+ * @edata : the calculated data of devfreq-event device
+ *
+ * Note that this function get the calculated event data from devfreq-event dev
+ * after stoping the progress of whole sequence of devfreq-event dev.
+ */
+int devfreq_event_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata)
+{
+ int ret;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ if (!edev->desc->ops || !edev->desc->ops->get_event)
+ return -EINVAL;
+
+ if (!devfreq_event_is_enabled(edev))
+ return -EINVAL;
+
+ edata->total_count = edata->load_count = 0;
+
+ mutex_lock(&edev->lock);
+ ret = edev->desc->ops->get_event(edev, edata);
+ if (ret < 0)
+ edata->total_count = edata->load_count = 0;
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_event);
+
+/**
+ * devfreq_event_reset_event() - Reset all opeations of devfreq-event dev.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function stop all operations of devfreq-event dev and reset
+ * the current event data to make the devfreq-event device into initial state.
+ */
+int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+ int ret = 0;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ if (!devfreq_event_is_enabled(edev))
+ return -EPERM;
+
+ mutex_lock(&edev->lock);
+ if (edev->desc->ops && edev->desc->ops->reset)
+ ret = edev->desc->ops->reset(edev);
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_reset_event);
+
+/**
+ * devfreq_event_get_edev_by_phandle() - Get the devfreq-event dev from
+ * devicetree.
+ * @dev : the pointer to the given device
+ * @index : the index into list of devfreq-event device
+ *
+ * Note that this function return the pointer of devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev,
+ int index)
+{
+ struct device_node *node;
+ struct devfreq_event_dev *edev;
+
+ if (!dev->of_node) {
+ dev_err(dev, "device does not have a device node entry\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ node = of_parse_phandle(dev->of_node, "devfreq-events", index);
+ if (!node) {
+ dev_err(dev, "failed to get phandle in %s node\n",
+ dev->of_node->full_name);
+ return ERR_PTR(-ENODEV);
+ }
+
+ mutex_lock(&devfreq_event_list_lock);
+ list_for_each_entry(edev, &devfreq_event_list, node) {
+ if (!strcmp(edev->desc->name, node->name))
+ goto out;
+ }
+ edev = NULL;
+out:
+ mutex_unlock(&devfreq_event_list_lock);
+
+ if (!edev) {
+ dev_err(dev, "unable to get devfreq-event device : %s\n",
+ node->name);
+ of_node_put(node);
+ return ERR_PTR(-ENODEV);
+ }
+
+ of_node_put(node);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_by_phandle);
+
+/**
+ * devfreq_event_get_edev_count() - Get the count of devfreq-event dev
+ * @dev : the pointer to the given device
+ *
+ * Note that this function return the count of devfreq-event devices.
+ */
+int devfreq_event_get_edev_count(struct device *dev)
+{
+ int count;
+
+ if (!dev->of_node) {
+ dev_err(dev, "device does not have a device node entry\n");
+ return -EINVAL;
+ }
+
+ count = of_property_count_elems_of_size(dev->of_node, "devfreq-events",
+ sizeof(u32));
+ if (count < 0 ) {
+ dev_err(dev,
+ "failed to get the count of devfreq-event in %s node\n",
+ dev->of_node->full_name);
+ return count;
+ }
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_count);
+
+static void devfreq_event_release_edev(struct device *dev)
+{
+ struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+ kfree(edev);
+}
+
+/**
+ * devfreq_event_add_edev() - Add new devfreq-event device.
+ * @dev : the device owning the devfreq-event device being created
+ * @desc : the devfreq-event device's decriptor which include essential
+ * data for devfreq-event device.
+ *
+ * Note that this function add new devfreq-event device to devfreq-event class
+ * list and register the device of the devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ struct devfreq_event_dev *edev;
+ static atomic_t event_no = ATOMIC_INIT(0);
+ int ret;
+
+ if (!dev || !desc)
+ return ERR_PTR(-EINVAL);
+
+ if (!desc->name || !desc->ops)
+ return ERR_PTR(-EINVAL);
+
+ if (!desc->ops->set_event || !desc->ops->get_event)
+ return ERR_PTR(-EINVAL);
+
+ edev = kzalloc(sizeof(struct devfreq_event_dev), GFP_KERNEL);
+ if (!edev)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&edev->lock);
+ edev->desc = desc;
+ edev->enable_count = 0;
+ edev->dev.parent = dev;
+ edev->dev.class = devfreq_event_class;
+ edev->dev.release = devfreq_event_release_edev;
+
+ dev_set_name(&edev->dev, "event.%d", atomic_inc_return(&event_no) - 1);
+ ret = device_register(&edev->dev);
+ if (ret < 0) {
+ put_device(&edev->dev);
+ return ERR_PTR(ret);
+ }
+ dev_set_drvdata(&edev->dev, edev);
+
+ INIT_LIST_HEAD(&edev->node);
+
+ mutex_lock(&devfreq_event_list_lock);
+ list_add(&edev->node, &devfreq_event_list);
+ mutex_unlock(&devfreq_event_list_lock);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_add_edev);
+
+/**
+ * devfreq_event_remove_edev() - Remove the devfreq-event device registered.
+ * @dev : the devfreq-event device
+ *
+ * Note that this function remove the registered devfreq-event device.
+ */
+int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+ if (!edev)
+ return -EINVAL;
+
+ WARN_ON(edev->enable_count);
+
+ mutex_lock(&devfreq_event_list_lock);
+ list_del(&edev->node);
+ mutex_unlock(&devfreq_event_list_lock);
+
+ device_unregister(&edev->dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_remove_edev);
+
+static int devm_devfreq_event_match(struct device *dev, void *res, void *data)
+{
+ struct devfreq_event_dev **r = res;
+
+ if (WARN_ON(!r || !*r))
+ return 0;
+
+ return *r == data;
+}
+
+static void devm_devfreq_event_release(struct device *dev, void *res)
+{
+ devfreq_event_remove_edev(*(struct devfreq_event_dev **)res);
+}
+
+/**
+ * devm_devfreq_event_add_edev() - Resource-managed devfreq_event_add_edev()
+ * @dev : the device owning the devfreq-event device being created
+ * @desc : the devfreq-event device's decriptor which include essential
+ * data for devfreq-event device.
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management and simplify the free operation
+ * for memory of devfreq-event device.
+ */
+struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ struct devfreq_event_dev **ptr, *edev;
+
+ ptr = devres_alloc(devm_devfreq_event_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ edev = devfreq_event_add_edev(dev, desc);
+ if (IS_ERR(edev)) {
+ devres_free(ptr);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ *ptr = edev;
+ devres_add(dev, ptr);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_add_edev);
+
+/**
+ * devm_devfreq_event_remove_edev()- Resource-managed devfreq_event_remove_edev()
+ * @dev : the device owning the devfreq-event device being created
+ * @edev : the devfreq-event device
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management.
+ */
+void devm_devfreq_event_remove_edev(struct device *dev,
+ struct devfreq_event_dev *edev)
+{
+ WARN_ON(devres_release(dev, devm_devfreq_event_release,
+ devm_devfreq_event_match, edev));
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_remove_edev);
+
+/*
+ * Device attributes for devfreq-event class.
+ */
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ return sprintf(buf, "%s\n", edev->desc->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t enable_count_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ return sprintf(buf, "%d\n", edev->enable_count);
+}
+static DEVICE_ATTR_RO(enable_count);
+
+static struct attribute *devfreq_event_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_enable_count.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(devfreq_event);
+
+static int __init devfreq_event_init(void)
+{
+ devfreq_event_class = class_create(THIS_MODULE, "devfreq-event");
+ if (IS_ERR(devfreq_event_class)) {
+ pr_err("%s: couldn't create class\n", __FILE__);
+ return PTR_ERR(devfreq_event_class);
+ }
+
+ devfreq_event_class->dev_groups = devfreq_event_groups;
+
+ return 0;
+}
+subsys_initcall(devfreq_event_init);
+
+static void __exit devfreq_event_exit(void)
+{
+ class_destroy(devfreq_event_class);
+}
+module_exit(devfreq_event_exit);
+
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_DESCRIPTION("DEVFREQ-Event class support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig
new file mode 100644
index 0000000..1ced42c
--- /dev/null
+++ b/drivers/devfreq/event/Kconfig
@@ -0,0 +1,16 @@
+menuconfig PM_DEVFREQ_EVENT
+ bool "DEVFREQ-Event device Support"
+ help
+ The devfreq-event device provide the raw data and events which
+ indicate the current state of devfreq-event device. The provided
+ data from devfreq-event device is used to monitor the state of
+ device and determine the suitable size of resource to reduce the
+ wasted resource.
+
+ The devfreq-event device can support the various type of events
+ (e.g., raw data, utilization, latency, bandwidth). The events
+ may be used by devfreq governor and other subsystem.
+
+if PM_DEVFREQ_EVENT
+
+endif # PM_DEVFREQ_EVENT
diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile
new file mode 100644
index 0000000..dc56005
--- /dev/null
+++ b/drivers/devfreq/event/Makefile
@@ -0,0 +1 @@
+# Exynos DEVFREQ Event Drivers
diff --git a/include/linux/devfreq-event.h b/include/linux/devfreq-event.h
new file mode 100644
index 0000000..602fbbf
--- /dev/null
+++ b/include/linux/devfreq-event.h
@@ -0,0 +1,196 @@
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_DEVFREQ_EVENT_H__
+#define __LINUX_DEVFREQ_EVENT_H__
+
+#include <linux/device.h>
+
+/**
+ * struct devfreq_event_dev - the devfreq-event device
+ *
+ * @node : Contain the devfreq-event device that have been registered.
+ * @dev : the device registered by devfreq-event class. dev.parent is
+ * the device using devfreq-event.
+ * @lock : a mutex to protect accessing devfreq-event.
+ * @enable_count: the number of enable function have been called.
+ * @desc : the description for devfreq-event device.
+ *
+ * This structure contains devfreq-event device information.
+ */
+struct devfreq_event_dev {
+ struct list_head node;
+
+ struct device dev;
+ struct mutex lock;
+ u32 enable_count;
+
+ const struct devfreq_event_desc *desc;
+};
+
+/**
+ * struct devfreq_event_data - the devfreq-event data
+ *
+ * @load_count : load count of devfreq-event device for the given period.
+ * @total_count : total count of devfreq-event device for the given period.
+ * each count may represent a clock cycle, a time unit
+ * (ns/us/...), or anything the device driver wants.
+ * Generally, utilization is load_count / total_count.
+ *
+ * This structure contains the data of devfreq-event device for polling period.
+ */
+struct devfreq_event_data {
+ unsigned long load_count;
+ unsigned long total_count;
+};
+
+/**
+ * struct devfreq_event_ops - the operations of devfreq-event device
+ *
+ * @enable : Enable the devfreq-event device.
+ * @disable : Disable the devfreq-event device.
+ * @reset : Reset all setting of the devfreq-event device.
+ * @set_event : Set the specific event type for the devfreq-event device.
+ * @get_event : Get the result of the devfreq-event devie with specific
+ * event type.
+ *
+ * This structure contains devfreq-event device operations which can be
+ * implemented by devfreq-event device drivers.
+ */
+struct devfreq_event_ops {
+ /* Optional functions */
+ int (*enable)(struct devfreq_event_dev *edev);
+ int (*disable)(struct devfreq_event_dev *edev);
+ int (*reset)(struct devfreq_event_dev *edev);
+
+ /* Mandatory functions */
+ int (*set_event)(struct devfreq_event_dev *edev);
+ int (*get_event)(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata);
+};
+
+/**
+ * struct devfreq_event_desc - the descriptor of devfreq-event device
+ *
+ * @name : the name of devfreq-event device.
+ * @driver_data : the private data for devfreq-event driver.
+ * @ops : the operation to control devfreq-event device.
+ *
+ * Each devfreq-event device is described with a this structure.
+ * This structure contains the various data for devfreq-event device.
+ */
+struct devfreq_event_desc {
+ const char *name;
+ void *driver_data;
+
+ struct devfreq_event_ops *ops;
+};
+
+#if defined(CONFIG_PM_DEVFREQ_EVENT)
+extern int devfreq_event_enable_edev(struct devfreq_event_dev *edev);
+extern int devfreq_event_disable_edev(struct devfreq_event_dev *edev);
+extern bool devfreq_event_is_enabled(struct devfreq_event_dev *edev);
+extern int devfreq_event_set_event(struct devfreq_event_dev *edev);
+extern int devfreq_event_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata);
+extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+ struct device *dev, int index);
+extern int devfreq_event_get_edev_count(struct device *dev);
+extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc);
+extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc);
+extern void devm_devfreq_event_remove_edev(struct device *dev,
+ struct devfreq_event_dev *edev);
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+ return edev->desc->driver_data;
+}
+#else
+static inline int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+ return false;
+}
+
+static inline int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline int devfreq_event_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata)
+{
+ return -EINVAL;
+}
+
+static inline int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+ struct device *dev, int index)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_get_edev_count(struct device *dev)
+{
+ return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devm_devfreq_event_add_edev(
+ struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline void devm_devfreq_event_remove_edev(struct device *dev,
+ struct devfreq_event_dev *edev)
+{
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+ return NULL;
+}
+#endif /* CONFIG_PM_DEVFREQ_EVENT */
+
+#endif /* __LINUX_DEVFREQ_EVENT_H__ */
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch add new devfreq_event class for devfreq_event device which provide
raw data (e.g., memory bus utilization/GPU utilization). This raw data from
devfreq_event data would be used for the governor of devfreq subsystem.
- devfreq_event device : Provide raw data for governor of existing devfreq device
- devfreq device : Monitor device state and change frequency/voltage of device
using the raw data from devfreq_event device
The devfreq subsystem support generic DVFS(Dynamic Voltage/Frequency Scaling)
for Non-CPU Devices. The devfreq device would dertermine current device state
using various governor (e.g., ondemand, performance, powersave). After completed
determination of system state, devfreq device would change the frequency/voltage
of devfreq device according to the result of governor.
But, devfreq governor must need basic data which indicates current device state.
Existing devfreq subsystem only consider devfreq device which check current system
state and determine proper system state using basic data. There is no subsystem
for device providing basic data to devfreq device.
The devfreq subsystem must need devfreq_event device(data-provider device) for
existing devfreq device. So, this patch add new devfreq_event class for
devfreq_event device which read various basic data(e.g, memory bus utilization,
GPU utilization) and provide measured data to existing devfreq device through
standard APIs of devfreq_event class.
The following description explains the feature of two kind of devfreq class:
- devfreq class (existing)
: devfreq consumer device use raw data from devfreq_event device for
determining proper current system state and change voltage/frequency
dynamically using various governors.
- devfreq_event class (new)
: Provide measured raw data to devfreq device for governor
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
---
drivers/devfreq/Kconfig | 2 +
drivers/devfreq/Makefile | 6 +-
drivers/devfreq/devfreq-event.c | 494 ++++++++++++++++++++++++++++++++++++++++
drivers/devfreq/event/Kconfig | 16 ++
drivers/devfreq/event/Makefile | 1 +
include/linux/devfreq-event.h | 196 ++++++++++++++++
6 files changed, 714 insertions(+), 1 deletion(-)
create mode 100644 drivers/devfreq/devfreq-event.c
create mode 100644 drivers/devfreq/event/Kconfig
create mode 100644 drivers/devfreq/event/Makefile
create mode 100644 include/linux/devfreq-event.h
diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig
index faf4e70..21f8f17 100644
--- a/drivers/devfreq/Kconfig
+++ b/drivers/devfreq/Kconfig
@@ -87,4 +87,6 @@ config ARM_EXYNOS5_BUS_DEVFREQ
It reads PPMU counters of memory controllers and adjusts the
operating frequencies and voltages with OPP support.
+source "drivers/devfreq/event/Kconfig"
+
endif # PM_DEVFREQ
diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile
index 16138c9..c449336 100644
--- a/drivers/devfreq/Makefile
+++ b/drivers/devfreq/Makefile
@@ -1,4 +1,5 @@
-obj-$(CONFIG_PM_DEVFREQ) += devfreq.o
+obj-$(CONFIG_PM_DEVFREQ) += devfreq.o
+obj-$(CONFIG_PM_DEVFREQ_EVENT) += devfreq-event.o
obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o
obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o
obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o
@@ -7,3 +8,6 @@ obj-$(CONFIG_DEVFREQ_GOV_USERSPACE) += governor_userspace.o
# DEVFREQ Drivers
obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ) += exynos/
obj-$(CONFIG_ARM_EXYNOS5_BUS_DEVFREQ) += exynos/
+
+# DEVFREQ Event Drivers
+obj-$(CONFIG_PM_DEVFREQ_EVENT) += event/
diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c
new file mode 100644
index 0000000..f304a02
--- /dev/null
+++ b/drivers/devfreq/devfreq-event.c
@@ -0,0 +1,494 @@
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2015 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/devfreq.c.
+ */
+
+#include <linux/devfreq-event.h>
+#include <linux/kernel.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/list.h>
+#include <linux/of.h>
+
+static struct class *devfreq_event_class;
+
+/* The list of all devfreq event list */
+static LIST_HEAD(devfreq_event_list);
+static DEFINE_MUTEX(devfreq_event_list_lock);
+
+#define to_devfreq_event(DEV) container_of(DEV, struct devfreq_event_dev, dev)
+
+/**
+ * devfreq_event_enable_edev() - Enable the devfreq-event dev and increase
+ * the enable_count of devfreq-event dev.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function increase the enable_count and enable the
+ * devfreq-event device. The devfreq-event device should be enabled before
+ * using it by devfreq device.
+ */
+int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+ int ret = 0;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ mutex_lock(&edev->lock);
+ if (edev->desc->ops && edev->desc->ops->enable
+ && edev->enable_count == 0) {
+ ret = edev->desc->ops->enable(edev);
+ if (ret < 0)
+ goto err;
+ }
+ edev->enable_count++;
+err:
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_enable_edev);
+
+/**
+ * devfreq_event_disable_edev() - Disable the devfreq-event dev and decrease
+ * the enable_count of the devfreq-event dev.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function decrease the enable_count and disable the
+ * devfreq-event device. After the devfreq-event device is disabled,
+ * devfreq device can't use the devfreq-event device for get/set/reset
+ * operations.
+ */
+int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+ int ret = 0;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ mutex_lock(&edev->lock);
+ if (edev->enable_count <= 0) {
+ dev_warn(&edev->dev, "unbalanced enable_count\n");
+ ret = -EIO;
+ goto err;
+ }
+
+ if (edev->desc->ops && edev->desc->ops->disable
+ && edev->enable_count == 1) {
+ ret = edev->desc->ops->disable(edev);
+ if (ret < 0)
+ goto err;
+ }
+ edev->enable_count--;
+err:
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_disable_edev);
+
+/**
+ * devfreq_event_is_enabled() - Check whether devfreq-event dev is enabled or
+ * not.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function check whether devfreq-event dev is enabled or not.
+ * If return true, the devfreq-event dev is enabeld. If return false, the
+ * devfreq-event dev is disabled.
+ */
+bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+ bool enabled = false;
+
+ if (!edev || !edev->desc)
+ return enabled;
+
+ mutex_lock(&edev->lock);
+
+ if (edev->enable_count > 0)
+ enabled = true;
+
+ mutex_unlock(&edev->lock);
+
+ return enabled;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_is_enabled);
+
+/**
+ * devfreq_event_set_event() - Set event to devfreq-event dev to start.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function set the event to the devfreq-event device to start
+ * for getting the event data which could be various event type.
+ */
+int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+ int ret;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ if (!edev->desc->ops || !edev->desc->ops->set_event)
+ return -EINVAL;
+
+ if (!devfreq_event_is_enabled(edev))
+ return -EPERM;
+
+ mutex_lock(&edev->lock);
+ ret = edev->desc->ops->set_event(edev);
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_set_event);
+
+/**
+ * devfreq_event_get_event() - Get {load|total}_count from devfreq-event dev.
+ * @edev : the devfreq-event device
+ * @edata : the calculated data of devfreq-event device
+ *
+ * Note that this function get the calculated event data from devfreq-event dev
+ * after stoping the progress of whole sequence of devfreq-event dev.
+ */
+int devfreq_event_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata)
+{
+ int ret;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ if (!edev->desc->ops || !edev->desc->ops->get_event)
+ return -EINVAL;
+
+ if (!devfreq_event_is_enabled(edev))
+ return -EINVAL;
+
+ edata->total_count = edata->load_count = 0;
+
+ mutex_lock(&edev->lock);
+ ret = edev->desc->ops->get_event(edev, edata);
+ if (ret < 0)
+ edata->total_count = edata->load_count = 0;
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_event);
+
+/**
+ * devfreq_event_reset_event() - Reset all opeations of devfreq-event dev.
+ * @edev : the devfreq-event device
+ *
+ * Note that this function stop all operations of devfreq-event dev and reset
+ * the current event data to make the devfreq-event device into initial state.
+ */
+int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+ int ret = 0;
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ if (!devfreq_event_is_enabled(edev))
+ return -EPERM;
+
+ mutex_lock(&edev->lock);
+ if (edev->desc->ops && edev->desc->ops->reset)
+ ret = edev->desc->ops->reset(edev);
+ mutex_unlock(&edev->lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_reset_event);
+
+/**
+ * devfreq_event_get_edev_by_phandle() - Get the devfreq-event dev from
+ * devicetree.
+ * @dev : the pointer to the given device
+ * @index : the index into list of devfreq-event device
+ *
+ * Note that this function return the pointer of devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev,
+ int index)
+{
+ struct device_node *node;
+ struct devfreq_event_dev *edev;
+
+ if (!dev->of_node) {
+ dev_err(dev, "device does not have a device node entry\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ node = of_parse_phandle(dev->of_node, "devfreq-events", index);
+ if (!node) {
+ dev_err(dev, "failed to get phandle in %s node\n",
+ dev->of_node->full_name);
+ return ERR_PTR(-ENODEV);
+ }
+
+ mutex_lock(&devfreq_event_list_lock);
+ list_for_each_entry(edev, &devfreq_event_list, node) {
+ if (!strcmp(edev->desc->name, node->name))
+ goto out;
+ }
+ edev = NULL;
+out:
+ mutex_unlock(&devfreq_event_list_lock);
+
+ if (!edev) {
+ dev_err(dev, "unable to get devfreq-event device : %s\n",
+ node->name);
+ of_node_put(node);
+ return ERR_PTR(-ENODEV);
+ }
+
+ of_node_put(node);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_by_phandle);
+
+/**
+ * devfreq_event_get_edev_count() - Get the count of devfreq-event dev
+ * @dev : the pointer to the given device
+ *
+ * Note that this function return the count of devfreq-event devices.
+ */
+int devfreq_event_get_edev_count(struct device *dev)
+{
+ int count;
+
+ if (!dev->of_node) {
+ dev_err(dev, "device does not have a device node entry\n");
+ return -EINVAL;
+ }
+
+ count = of_property_count_elems_of_size(dev->of_node, "devfreq-events",
+ sizeof(u32));
+ if (count < 0 ) {
+ dev_err(dev,
+ "failed to get the count of devfreq-event in %s node\n",
+ dev->of_node->full_name);
+ return count;
+ }
+
+ return count;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_get_edev_count);
+
+static void devfreq_event_release_edev(struct device *dev)
+{
+ struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+ kfree(edev);
+}
+
+/**
+ * devfreq_event_add_edev() - Add new devfreq-event device.
+ * @dev : the device owning the devfreq-event device being created
+ * @desc : the devfreq-event device's decriptor which include essential
+ * data for devfreq-event device.
+ *
+ * Note that this function add new devfreq-event device to devfreq-event class
+ * list and register the device of the devfreq-event device.
+ */
+struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ struct devfreq_event_dev *edev;
+ static atomic_t event_no = ATOMIC_INIT(0);
+ int ret;
+
+ if (!dev || !desc)
+ return ERR_PTR(-EINVAL);
+
+ if (!desc->name || !desc->ops)
+ return ERR_PTR(-EINVAL);
+
+ if (!desc->ops->set_event || !desc->ops->get_event)
+ return ERR_PTR(-EINVAL);
+
+ edev = kzalloc(sizeof(struct devfreq_event_dev), GFP_KERNEL);
+ if (!edev)
+ return ERR_PTR(-ENOMEM);
+
+ mutex_init(&edev->lock);
+ edev->desc = desc;
+ edev->enable_count = 0;
+ edev->dev.parent = dev;
+ edev->dev.class = devfreq_event_class;
+ edev->dev.release = devfreq_event_release_edev;
+
+ dev_set_name(&edev->dev, "event.%d", atomic_inc_return(&event_no) - 1);
+ ret = device_register(&edev->dev);
+ if (ret < 0) {
+ put_device(&edev->dev);
+ return ERR_PTR(ret);
+ }
+ dev_set_drvdata(&edev->dev, edev);
+
+ INIT_LIST_HEAD(&edev->node);
+
+ mutex_lock(&devfreq_event_list_lock);
+ list_add(&edev->node, &devfreq_event_list);
+ mutex_unlock(&devfreq_event_list_lock);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_add_edev);
+
+/**
+ * devfreq_event_remove_edev() - Remove the devfreq-event device registered.
+ * @dev : the devfreq-event device
+ *
+ * Note that this function remove the registered devfreq-event device.
+ */
+int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+ if (!edev)
+ return -EINVAL;
+
+ WARN_ON(edev->enable_count);
+
+ mutex_lock(&devfreq_event_list_lock);
+ list_del(&edev->node);
+ mutex_unlock(&devfreq_event_list_lock);
+
+ device_unregister(&edev->dev);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devfreq_event_remove_edev);
+
+static int devm_devfreq_event_match(struct device *dev, void *res, void *data)
+{
+ struct devfreq_event_dev **r = res;
+
+ if (WARN_ON(!r || !*r))
+ return 0;
+
+ return *r == data;
+}
+
+static void devm_devfreq_event_release(struct device *dev, void *res)
+{
+ devfreq_event_remove_edev(*(struct devfreq_event_dev **)res);
+}
+
+/**
+ * devm_devfreq_event_add_edev() - Resource-managed devfreq_event_add_edev()
+ * @dev : the device owning the devfreq-event device being created
+ * @desc : the devfreq-event device's decriptor which include essential
+ * data for devfreq-event device.
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management and simplify the free operation
+ * for memory of devfreq-event device.
+ */
+struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ struct devfreq_event_dev **ptr, *edev;
+
+ ptr = devres_alloc(devm_devfreq_event_release, sizeof(*ptr), GFP_KERNEL);
+ if (!ptr)
+ return ERR_PTR(-ENOMEM);
+
+ edev = devfreq_event_add_edev(dev, desc);
+ if (IS_ERR(edev)) {
+ devres_free(ptr);
+ return ERR_PTR(-ENOMEM);
+ }
+
+ *ptr = edev;
+ devres_add(dev, ptr);
+
+ return edev;
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_add_edev);
+
+/**
+ * devm_devfreq_event_remove_edev()- Resource-managed devfreq_event_remove_edev()
+ * @dev : the device owning the devfreq-event device being created
+ * @edev : the devfreq-event device
+ *
+ * Note that this function manages automatically the memory of devfreq-event
+ * device using device resource management.
+ */
+void devm_devfreq_event_remove_edev(struct device *dev,
+ struct devfreq_event_dev *edev)
+{
+ WARN_ON(devres_release(dev, devm_devfreq_event_release,
+ devm_devfreq_event_match, edev));
+}
+EXPORT_SYMBOL_GPL(devm_devfreq_event_remove_edev);
+
+/*
+ * Device attributes for devfreq-event class.
+ */
+static ssize_t name_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ return sprintf(buf, "%s\n", edev->desc->name);
+}
+static DEVICE_ATTR_RO(name);
+
+static ssize_t enable_count_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct devfreq_event_dev *edev = to_devfreq_event(dev);
+
+ if (!edev || !edev->desc)
+ return -EINVAL;
+
+ return sprintf(buf, "%d\n", edev->enable_count);
+}
+static DEVICE_ATTR_RO(enable_count);
+
+static struct attribute *devfreq_event_attrs[] = {
+ &dev_attr_name.attr,
+ &dev_attr_enable_count.attr,
+ NULL,
+};
+ATTRIBUTE_GROUPS(devfreq_event);
+
+static int __init devfreq_event_init(void)
+{
+ devfreq_event_class = class_create(THIS_MODULE, "devfreq-event");
+ if (IS_ERR(devfreq_event_class)) {
+ pr_err("%s: couldn't create class\n", __FILE__);
+ return PTR_ERR(devfreq_event_class);
+ }
+
+ devfreq_event_class->dev_groups = devfreq_event_groups;
+
+ return 0;
+}
+subsys_initcall(devfreq_event_init);
+
+static void __exit devfreq_event_exit(void)
+{
+ class_destroy(devfreq_event_class);
+}
+module_exit(devfreq_event_exit);
+
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_DESCRIPTION("DEVFREQ-Event class support");
+MODULE_LICENSE("GPL");
diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig
new file mode 100644
index 0000000..1ced42c
--- /dev/null
+++ b/drivers/devfreq/event/Kconfig
@@ -0,0 +1,16 @@
+menuconfig PM_DEVFREQ_EVENT
+ bool "DEVFREQ-Event device Support"
+ help
+ The devfreq-event device provide the raw data and events which
+ indicate the current state of devfreq-event device. The provided
+ data from devfreq-event device is used to monitor the state of
+ device and determine the suitable size of resource to reduce the
+ wasted resource.
+
+ The devfreq-event device can support the various type of events
+ (e.g., raw data, utilization, latency, bandwidth). The events
+ may be used by devfreq governor and other subsystem.
+
+if PM_DEVFREQ_EVENT
+
+endif # PM_DEVFREQ_EVENT
diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile
new file mode 100644
index 0000000..dc56005
--- /dev/null
+++ b/drivers/devfreq/event/Makefile
@@ -0,0 +1 @@
+# Exynos DEVFREQ Event Drivers
diff --git a/include/linux/devfreq-event.h b/include/linux/devfreq-event.h
new file mode 100644
index 0000000..602fbbf
--- /dev/null
+++ b/include/linux/devfreq-event.h
@@ -0,0 +1,196 @@
+/*
+ * devfreq-event: a framework to provide raw data and events of devfreq devices
+ *
+ * Copyright (C) 2014 Samsung Electronics
+ * Author: Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __LINUX_DEVFREQ_EVENT_H__
+#define __LINUX_DEVFREQ_EVENT_H__
+
+#include <linux/device.h>
+
+/**
+ * struct devfreq_event_dev - the devfreq-event device
+ *
+ * @node : Contain the devfreq-event device that have been registered.
+ * @dev : the device registered by devfreq-event class. dev.parent is
+ * the device using devfreq-event.
+ * @lock : a mutex to protect accessing devfreq-event.
+ * @enable_count: the number of enable function have been called.
+ * @desc : the description for devfreq-event device.
+ *
+ * This structure contains devfreq-event device information.
+ */
+struct devfreq_event_dev {
+ struct list_head node;
+
+ struct device dev;
+ struct mutex lock;
+ u32 enable_count;
+
+ const struct devfreq_event_desc *desc;
+};
+
+/**
+ * struct devfreq_event_data - the devfreq-event data
+ *
+ * @load_count : load count of devfreq-event device for the given period.
+ * @total_count : total count of devfreq-event device for the given period.
+ * each count may represent a clock cycle, a time unit
+ * (ns/us/...), or anything the device driver wants.
+ * Generally, utilization is load_count / total_count.
+ *
+ * This structure contains the data of devfreq-event device for polling period.
+ */
+struct devfreq_event_data {
+ unsigned long load_count;
+ unsigned long total_count;
+};
+
+/**
+ * struct devfreq_event_ops - the operations of devfreq-event device
+ *
+ * @enable : Enable the devfreq-event device.
+ * @disable : Disable the devfreq-event device.
+ * @reset : Reset all setting of the devfreq-event device.
+ * @set_event : Set the specific event type for the devfreq-event device.
+ * @get_event : Get the result of the devfreq-event devie with specific
+ * event type.
+ *
+ * This structure contains devfreq-event device operations which can be
+ * implemented by devfreq-event device drivers.
+ */
+struct devfreq_event_ops {
+ /* Optional functions */
+ int (*enable)(struct devfreq_event_dev *edev);
+ int (*disable)(struct devfreq_event_dev *edev);
+ int (*reset)(struct devfreq_event_dev *edev);
+
+ /* Mandatory functions */
+ int (*set_event)(struct devfreq_event_dev *edev);
+ int (*get_event)(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata);
+};
+
+/**
+ * struct devfreq_event_desc - the descriptor of devfreq-event device
+ *
+ * @name : the name of devfreq-event device.
+ * @driver_data : the private data for devfreq-event driver.
+ * @ops : the operation to control devfreq-event device.
+ *
+ * Each devfreq-event device is described with a this structure.
+ * This structure contains the various data for devfreq-event device.
+ */
+struct devfreq_event_desc {
+ const char *name;
+ void *driver_data;
+
+ struct devfreq_event_ops *ops;
+};
+
+#if defined(CONFIG_PM_DEVFREQ_EVENT)
+extern int devfreq_event_enable_edev(struct devfreq_event_dev *edev);
+extern int devfreq_event_disable_edev(struct devfreq_event_dev *edev);
+extern bool devfreq_event_is_enabled(struct devfreq_event_dev *edev);
+extern int devfreq_event_set_event(struct devfreq_event_dev *edev);
+extern int devfreq_event_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata);
+extern int devfreq_event_reset_event(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+ struct device *dev, int index);
+extern int devfreq_event_get_edev_count(struct device *dev);
+extern struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc);
+extern int devfreq_event_remove_edev(struct devfreq_event_dev *edev);
+extern struct devfreq_event_dev *devm_devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc);
+extern void devm_devfreq_event_remove_edev(struct device *dev,
+ struct devfreq_event_dev *edev);
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+ return edev->desc->driver_data;
+}
+#else
+static inline int devfreq_event_enable_edev(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline int devfreq_event_disable_edev(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline bool devfreq_event_is_enabled(struct devfreq_event_dev *edev)
+{
+ return false;
+}
+
+static inline int devfreq_event_set_event(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline int devfreq_event_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata)
+{
+ return -EINVAL;
+}
+
+static inline int devfreq_event_reset_event(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(
+ struct device *dev, int index)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_get_edev_count(struct device *dev)
+{
+ return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devfreq_event_add_edev(struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline int devfreq_event_remove_edev(struct devfreq_event_dev *edev)
+{
+ return -EINVAL;
+}
+
+static inline struct devfreq_event_dev *devm_devfreq_event_add_edev(
+ struct device *dev,
+ struct devfreq_event_desc *desc)
+{
+ return ERR_PTR(-EINVAL);
+}
+
+static inline void devm_devfreq_event_remove_edev(struct device *dev,
+ struct devfreq_event_dev *edev)
+{
+}
+
+static inline void *devfreq_event_get_drvdata(struct devfreq_event_dev *edev)
+{
+ return NULL;
+}
+#endif /* CONFIG_PM_DEVFREQ_EVENT */
+
+#endif /* __LINUX_DEVFREQ_EVENT_H__ */
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 2/7] devfreq: event: Add exynos-ppmu devfreq-event driver
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch adds exynos-ppmu devfreq-event driver to get performance data
of each IP for Samsung Exynos SoC. These event from Exynos PPMU provide
useful information about the behavior of the SoC that you can use when
analyzing system performance, and made visible and can be counted using
logic in each IP.
This patch is based on existing drivers/devfreq/exynos/exynos-ppmu.c
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
drivers/devfreq/event/Kconfig | 9 +
drivers/devfreq/event/Makefile | 1 +
drivers/devfreq/event/exynos-ppmu.c | 374 ++++++++++++++++++++++++++++++++++++
drivers/devfreq/event/exynos-ppmu.h | 93 +++++++++
4 files changed, 477 insertions(+)
create mode 100644 drivers/devfreq/event/exynos-ppmu.c
create mode 100644 drivers/devfreq/event/exynos-ppmu.h
diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig
index 1ced42c..a11720a 100644
--- a/drivers/devfreq/event/Kconfig
+++ b/drivers/devfreq/event/Kconfig
@@ -13,4 +13,13 @@ menuconfig PM_DEVFREQ_EVENT
if PM_DEVFREQ_EVENT
+config DEVFREQ_EVENT_EXYNOS_PPMU
+ bool "EXYNOS PPMU (Platform Performance Monitoring Unit) DEVFREQ event Driver"
+ depends on ARCH_EXYNOS
+ select PM_OPP
+ help
+ This add the devfreq-event driver for Exynos SoC. It provides PPMU
+ (Platform Performance Monitoring Unit) counters to estimate the
+ utilization of each module.
+
endif # PM_DEVFREQ_EVENT
diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile
index dc56005..be146ea 100644
--- a/drivers/devfreq/event/Makefile
+++ b/drivers/devfreq/event/Makefile
@@ -1 +1,2 @@
# Exynos DEVFREQ Event Drivers
+obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o
diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
new file mode 100644
index 0000000..135be0a
--- /dev/null
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -0,0 +1,374 @@
+/*
+ * exynos_ppmu.c - EXYNOS PPMU (Platform Performance Monitoring Unit) support
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/exynos/exynos_ppmu.c
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include <linux/devfreq-event.h>
+
+#include "exynos-ppmu.h"
+
+struct exynos_ppmu_data {
+ void __iomem *base;
+ struct clk *clk;
+};
+
+struct exynos_ppmu {
+ struct devfreq_event_dev **edev;
+ struct devfreq_event_desc *desc;
+ unsigned int num_events;
+
+ struct device *dev;
+ struct mutex lock;
+
+ struct exynos_ppmu_data ppmu;
+};
+
+#define PPMU_EVENT(name) \
+ { "ppmu-event0-"#name, PPMU_PMNCNT0 }, \
+ { "ppmu-event1-"#name, PPMU_PMNCNT1 }, \
+ { "ppmu-event2-"#name, PPMU_PMNCNT2 }, \
+ { "ppmu-event3-"#name, PPMU_PMNCNT3 }
+
+struct __exynos_ppmu_events {
+ char *name;
+ int id;
+} ppmu_events[] = {
+ /* For Exynos3250, Exynos4 and Exynos5260 */
+ PPMU_EVENT(g3d),
+ PPMU_EVENT(fsys),
+
+ /* For Exynos4 SoCs and Exynos3250 */
+ PPMU_EVENT(dmc0),
+ PPMU_EVENT(dmc1),
+ PPMU_EVENT(cpu),
+ PPMU_EVENT(rightbus),
+ PPMU_EVENT(leftbus),
+ PPMU_EVENT(lcd0),
+ PPMU_EVENT(camif),
+
+ /* Only for Exynos3250 and Exynos5260 */
+ PPMU_EVENT(mfc),
+
+ /* Only for Exynos4 SoCs */
+ PPMU_EVENT(mfc-left),
+ PPMU_EVENT(mfc-right),
+
+ /* Only for Exynos5260 SoCs */
+ PPMU_EVENT(drex0-s0),
+ PPMU_EVENT(drex0-s1),
+ PPMU_EVENT(drex1-s0),
+ PPMU_EVENT(drex1-s1),
+ PPMU_EVENT(eagle),
+ PPMU_EVENT(kfc),
+ PPMU_EVENT(isp),
+ PPMU_EVENT(fimc),
+ PPMU_EVENT(gscl),
+ PPMU_EVENT(mscl),
+ PPMU_EVENT(fimd0x),
+ PPMU_EVENT(fimd1x),
+ { /* sentinel */ },
+};
+
+static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ppmu_events); i++)
+ if (!strcmp(edev->desc->name, ppmu_events[i].name))
+ return ppmu_events[i].id;
+
+ return -EINVAL;
+}
+
+static int exynos_ppmu_disable(struct devfreq_event_dev *edev)
+{
+ struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+ u32 pmnc;
+
+ /* Disable all counters */
+ __raw_writel(PPMU_CCNT_MASK |
+ PPMU_PMCNT0_MASK |
+ PPMU_PMCNT1_MASK |
+ PPMU_PMCNT2_MASK |
+ PPMU_PMCNT3_MASK,
+ info->ppmu.base + PPMU_CNTENC);
+
+ /* Disable PPMU */
+ pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+ pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+ __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+ return 0;
+}
+
+static int exynos_ppmu_set_event(struct devfreq_event_dev *edev)
+{
+ struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+ int id = exynos_ppmu_find_ppmu_id(edev);
+ u32 pmnc, cntens;
+
+ if (id < 0)
+ return id;
+
+ /* Enable specific counter */
+ cntens = __raw_readl(info->ppmu.base + PPMU_CNTENS);
+ cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+ __raw_writel(cntens, info->ppmu.base + PPMU_CNTENS);
+
+ /* Set the event of Read/Write data count */
+ __raw_writel(PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT,
+ info->ppmu.base + PPMU_BEVTxSEL(id));
+
+ /* Reset cycle counter/performance counter and enable PPMU */
+ pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+ pmnc &= ~(PPMU_PMNC_ENABLE_MASK
+ | PPMU_PMNC_COUNTER_RESET_MASK
+ | PPMU_PMNC_CC_RESET_MASK);
+ pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT);
+ pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
+ pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
+ __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+ return 0;
+}
+
+static int exynos_ppmu_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata)
+{
+ struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+ int id = exynos_ppmu_find_ppmu_id(edev);
+ u32 pmnc, cntenc;
+
+ if (id < 0)
+ return -EINVAL;
+
+ /* Disable PPMU */
+ pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+ pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+ __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+ /* Read cycle count */
+ edata->total_count = __raw_readl(info->ppmu.base + PPMU_CCNT);
+
+ /* Read performance count */
+ switch (id) {
+ case PPMU_PMNCNT0:
+ case PPMU_PMNCNT1:
+ case PPMU_PMNCNT2:
+ edata->load_count
+ = __raw_readl(info->ppmu.base + PPMU_PMNCT(id));
+ break;
+ case PPMU_PMNCNT3:
+ edata->load_count =
+ ((__raw_readl(info->ppmu.base + PPMU_PMCNT3_HIGH) << 8)
+ | __raw_readl(info->ppmu.base + PPMU_PMCNT3_LOW));
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Disable specific counter */
+ cntenc = __raw_readl(info->ppmu.base + PPMU_CNTENC);
+ cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+ __raw_writel(cntenc, info->ppmu.base + PPMU_CNTENC);
+
+ dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name,
+ edata->load_count, edata->total_count);
+
+ return 0;
+}
+
+static struct devfreq_event_ops exynos_ppmu_ops = {
+ .disable = exynos_ppmu_disable,
+ .set_event = exynos_ppmu_set_event,
+ .get_event = exynos_ppmu_get_event,
+};
+
+static int of_get_devfreq_events(struct device_node *np,
+ struct exynos_ppmu *info)
+{
+ struct devfreq_event_desc *desc;
+ struct device *dev = info->dev;
+ struct device_node *events_np, *node;
+ int i, j, count;
+
+ events_np = of_get_child_by_name(np, "events");
+ if (!events_np) {
+ dev_err(dev,
+ "failed to get child node of devfreq-event devices\n");
+ return -EINVAL;
+ }
+
+ count = of_get_child_count(events_np);
+ desc = devm_kzalloc(dev, sizeof(*desc) * count, GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+ info->num_events = count;
+
+ j = 0;
+ for_each_child_of_node(events_np, node) {
+ for (i = 0; i < ARRAY_SIZE(ppmu_events); i++) {
+ if (!ppmu_events[i].name)
+ continue;
+
+ if (!of_node_cmp(node->name, ppmu_events[i].name))
+ break;
+ }
+
+ if (i == ARRAY_SIZE(ppmu_events)) {
+ dev_warn(dev,
+ "don't know how to configure events : %s\n",
+ node->name);
+ continue;
+ }
+
+ desc[j].ops = &exynos_ppmu_ops;
+ desc[j].driver_data = info;
+
+ of_property_read_string(node, "event-name", &desc[j].name);
+
+ j++;
+
+ of_node_put(node);
+ }
+ info->desc = desc;
+
+ of_node_put(events_np);
+
+ return 0;
+}
+
+static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
+{
+ struct device *dev = info->dev;
+ struct device_node *np = dev->of_node;
+ int ret = 0;
+
+ if (!np) {
+ dev_err(dev, "failed to find devicetree node\n");
+ return -EINVAL;
+ }
+
+ /* Maps the memory mapped IO to control PPMU register */
+ info->ppmu.base = of_iomap(np, 0);
+ if (IS_ERR_OR_NULL(info->ppmu.base)) {
+ dev_err(dev, "failed to map memory region\n");
+ return -ENOMEM;
+ }
+
+ info->ppmu.clk = devm_clk_get(dev, "ppmu");
+ if (IS_ERR(info->ppmu.clk)) {
+ info->ppmu.clk = NULL;
+ dev_warn(dev, "cannot get PPMU clock\n");
+ }
+
+ ret = of_get_devfreq_events(np, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to parse exynos ppmu dt node\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ iounmap(info->ppmu.base);
+
+ return ret;
+}
+
+static int exynos_ppmu_probe(struct platform_device *pdev)
+{
+ struct exynos_ppmu *info;
+ struct devfreq_event_dev **edev;
+ struct devfreq_event_desc *desc;
+ int i, ret = 0, size;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ mutex_init(&info->lock);
+ info->dev = &pdev->dev;
+
+ /* Parse dt data to get resource */
+ ret = exynos_ppmu_parse_dt(info);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "failed to parse devicetree for resource\n");
+ return ret;
+ }
+ desc = info->desc;
+
+ size = sizeof(struct devfreq_event_dev *) * info->num_events;
+ info->edev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (!info->edev) {
+ dev_err(&pdev->dev,
+ "failed to allocate memory devfreq-event devices\n");
+ return -ENOMEM;
+ }
+ edev = info->edev;
+ platform_set_drvdata(pdev, info);
+
+ for (i = 0; i < info->num_events; i++) {
+ edev[i] = devm_devfreq_event_add_edev(&pdev->dev, &desc[i]);
+ if (IS_ERR(edev)) {
+ ret = PTR_ERR(edev);
+ dev_err(&pdev->dev,
+ "failed to add devfreq-event device\n");
+ goto err;
+ }
+ }
+
+ clk_prepare_enable(info->ppmu.clk);
+
+ return 0;
+err:
+ iounmap(info->ppmu.base);
+
+ return ret;
+}
+
+static int exynos_ppmu_remove(struct platform_device *pdev)
+{
+ struct exynos_ppmu *info = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(info->ppmu.clk);
+ iounmap(info->ppmu.base);
+
+ return 0;
+}
+
+static struct of_device_id exynos_ppmu_id_match[] = {
+ { .compatible = "samsung,exynos-ppmu", },
+ { /* sentinel */ },
+};
+
+static struct platform_driver exynos_ppmu_driver = {
+ .probe = exynos_ppmu_probe,
+ .remove = exynos_ppmu_remove,
+ .driver = {
+ .name = "exynos-ppmu",
+ .of_match_table = exynos_ppmu_id_match,
+ },
+};
+module_platform_driver(exynos_ppmu_driver);
+
+MODULE_DESCRIPTION("Exynos PPMU(Platform Performance Monitoring Unit) driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/devfreq/event/exynos-ppmu.h b/drivers/devfreq/event/exynos-ppmu.h
new file mode 100644
index 0000000..4e831d4
--- /dev/null
+++ b/drivers/devfreq/event/exynos-ppmu.h
@@ -0,0 +1,93 @@
+/*
+ * exynos_ppmu.h - EXYNOS PPMU header file
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __EXYNOS_PPMU_H__
+#define __EXYNOS_PPMU_H__
+
+enum ppmu_state {
+ PPMU_DISABLE = 0,
+ PPMU_ENABLE,
+};
+
+enum ppmu_counter {
+ PPMU_PMNCNT0 = 0,
+ PPMU_PMNCNT1,
+ PPMU_PMNCNT2,
+ PPMU_PMNCNT3,
+
+ PPMU_PMNCNT_MAX,
+};
+
+enum ppmu_event_type {
+ PPMU_RO_BUSY_CYCLE_CNT = 0x0,
+ PPMU_WO_BUSY_CYCLE_CNT = 0x1,
+ PPMU_RW_BUSY_CYCLE_CNT = 0x2,
+ PPMU_RO_REQUEST_CNT = 0x3,
+ PPMU_WO_REQUEST_CNT = 0x4,
+ PPMU_RO_DATA_CNT = 0x5,
+ PPMU_WO_DATA_CNT = 0x6,
+ PPMU_RO_LATENCY = 0x12,
+ PPMU_WO_LATENCY = 0x16,
+};
+
+enum ppmu_reg {
+ /* PPC control register */
+ PPMU_PMNC = 0x00,
+ PPMU_CNTENS = 0x10,
+ PPMU_CNTENC = 0x20,
+ PPMU_INTENS = 0x30,
+ PPMU_INTENC = 0x40,
+ PPMU_FLAG = 0x50,
+
+ /* Cycle Counter and Performance Event Counter Register */
+ PPMU_CCNT = 0x100,
+ PPMU_PMCNT0 = 0x110,
+ PPMU_PMCNT1 = 0x120,
+ PPMU_PMCNT2 = 0x130,
+ PPMU_PMCNT3_HIGH = 0x140,
+ PPMU_PMCNT3_LOW = 0x150,
+
+ /* Bus Event Generator */
+ PPMU_BEVT0SEL = 0x1000,
+ PPMU_BEVT1SEL = 0x1100,
+ PPMU_BEVT2SEL = 0x1200,
+ PPMU_BEVT3SEL = 0x1300,
+ PPMU_COUNTER_RESET = 0x1810,
+ PPMU_READ_OVERFLOW_CNT = 0x1810,
+ PPMU_READ_UNDERFLOW_CNT = 0x1814,
+ PPMU_WRITE_OVERFLOW_CNT = 0x1850,
+ PPMU_WRITE_UNDERFLOW_CNT = 0x1854,
+ PPMU_READ_PENDING_CNT = 0x1880,
+ PPMU_WRITE_PENDING_CNT = 0x1884
+};
+
+/* PMNC register */
+#define PPMU_PMNC_CC_RESET_SHIFT 2
+#define PPMU_PMNC_COUNTER_RESET_SHIFT 1
+#define PPMU_PMNC_ENABLE_SHIFT 0
+#define PPMU_PMNC_START_MODE_MASK BIT(16)
+#define PPMU_PMNC_CC_DIVIDER_MASK BIT(3)
+#define PPMU_PMNC_CC_RESET_MASK BIT(2)
+#define PPMU_PMNC_COUNTER_RESET_MASK BIT(1)
+#define PPMU_PMNC_ENABLE_MASK BIT(0)
+
+/* CNTENS/CNTENC/INTENS/INTENC/FLAG register */
+#define PPMU_CCNT_MASK BIT(31)
+#define PPMU_PMCNT3_MASK BIT(3)
+#define PPMU_PMCNT2_MASK BIT(2)
+#define PPMU_PMCNT1_MASK BIT(1)
+#define PPMU_PMCNT0_MASK BIT(0)
+
+/* PPMU_PMNCTx/PPMU_BETxSEL registers */
+#define PPMU_PMNCT(x) (PPMU_PMCNT0 + (0x10 * x))
+#define PPMU_BEVTxSEL(x) (PPMU_BEVT0SEL + (0x100 * x))
+
+#endif /* __EXYNOS_PPMU_H__ */
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 2/7] devfreq: event: Add exynos-ppmu devfreq-event driver
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch adds exynos-ppmu devfreq-event driver to get performance data
of each IP for Samsung Exynos SoC. These event from Exynos PPMU provide
useful information about the behavior of the SoC that you can use when
analyzing system performance, and made visible and can be counted using
logic in each IP.
This patch is based on existing drivers/devfreq/exynos/exynos-ppmu.c
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
drivers/devfreq/event/Kconfig | 9 +
drivers/devfreq/event/Makefile | 1 +
drivers/devfreq/event/exynos-ppmu.c | 374 ++++++++++++++++++++++++++++++++++++
drivers/devfreq/event/exynos-ppmu.h | 93 +++++++++
4 files changed, 477 insertions(+)
create mode 100644 drivers/devfreq/event/exynos-ppmu.c
create mode 100644 drivers/devfreq/event/exynos-ppmu.h
diff --git a/drivers/devfreq/event/Kconfig b/drivers/devfreq/event/Kconfig
index 1ced42c..a11720a 100644
--- a/drivers/devfreq/event/Kconfig
+++ b/drivers/devfreq/event/Kconfig
@@ -13,4 +13,13 @@ menuconfig PM_DEVFREQ_EVENT
if PM_DEVFREQ_EVENT
+config DEVFREQ_EVENT_EXYNOS_PPMU
+ bool "EXYNOS PPMU (Platform Performance Monitoring Unit) DEVFREQ event Driver"
+ depends on ARCH_EXYNOS
+ select PM_OPP
+ help
+ This add the devfreq-event driver for Exynos SoC. It provides PPMU
+ (Platform Performance Monitoring Unit) counters to estimate the
+ utilization of each module.
+
endif # PM_DEVFREQ_EVENT
diff --git a/drivers/devfreq/event/Makefile b/drivers/devfreq/event/Makefile
index dc56005..be146ea 100644
--- a/drivers/devfreq/event/Makefile
+++ b/drivers/devfreq/event/Makefile
@@ -1 +1,2 @@
# Exynos DEVFREQ Event Drivers
+obj-$(CONFIG_DEVFREQ_EVENT_EXYNOS_PPMU) += exynos-ppmu.o
diff --git a/drivers/devfreq/event/exynos-ppmu.c b/drivers/devfreq/event/exynos-ppmu.c
new file mode 100644
index 0000000..135be0a
--- /dev/null
+++ b/drivers/devfreq/event/exynos-ppmu.c
@@ -0,0 +1,374 @@
+/*
+ * exynos_ppmu.c - EXYNOS PPMU (Platform Performance Monitoring Unit) support
+ *
+ * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This driver is based on drivers/devfreq/exynos/exynos_ppmu.c
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/of_address.h>
+#include <linux/platform_device.h>
+#include <linux/suspend.h>
+#include <linux/devfreq-event.h>
+
+#include "exynos-ppmu.h"
+
+struct exynos_ppmu_data {
+ void __iomem *base;
+ struct clk *clk;
+};
+
+struct exynos_ppmu {
+ struct devfreq_event_dev **edev;
+ struct devfreq_event_desc *desc;
+ unsigned int num_events;
+
+ struct device *dev;
+ struct mutex lock;
+
+ struct exynos_ppmu_data ppmu;
+};
+
+#define PPMU_EVENT(name) \
+ { "ppmu-event0-"#name, PPMU_PMNCNT0 }, \
+ { "ppmu-event1-"#name, PPMU_PMNCNT1 }, \
+ { "ppmu-event2-"#name, PPMU_PMNCNT2 }, \
+ { "ppmu-event3-"#name, PPMU_PMNCNT3 }
+
+struct __exynos_ppmu_events {
+ char *name;
+ int id;
+} ppmu_events[] = {
+ /* For Exynos3250, Exynos4 and Exynos5260 */
+ PPMU_EVENT(g3d),
+ PPMU_EVENT(fsys),
+
+ /* For Exynos4 SoCs and Exynos3250 */
+ PPMU_EVENT(dmc0),
+ PPMU_EVENT(dmc1),
+ PPMU_EVENT(cpu),
+ PPMU_EVENT(rightbus),
+ PPMU_EVENT(leftbus),
+ PPMU_EVENT(lcd0),
+ PPMU_EVENT(camif),
+
+ /* Only for Exynos3250 and Exynos5260 */
+ PPMU_EVENT(mfc),
+
+ /* Only for Exynos4 SoCs */
+ PPMU_EVENT(mfc-left),
+ PPMU_EVENT(mfc-right),
+
+ /* Only for Exynos5260 SoCs */
+ PPMU_EVENT(drex0-s0),
+ PPMU_EVENT(drex0-s1),
+ PPMU_EVENT(drex1-s0),
+ PPMU_EVENT(drex1-s1),
+ PPMU_EVENT(eagle),
+ PPMU_EVENT(kfc),
+ PPMU_EVENT(isp),
+ PPMU_EVENT(fimc),
+ PPMU_EVENT(gscl),
+ PPMU_EVENT(mscl),
+ PPMU_EVENT(fimd0x),
+ PPMU_EVENT(fimd1x),
+ { /* sentinel */ },
+};
+
+static int exynos_ppmu_find_ppmu_id(struct devfreq_event_dev *edev)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(ppmu_events); i++)
+ if (!strcmp(edev->desc->name, ppmu_events[i].name))
+ return ppmu_events[i].id;
+
+ return -EINVAL;
+}
+
+static int exynos_ppmu_disable(struct devfreq_event_dev *edev)
+{
+ struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+ u32 pmnc;
+
+ /* Disable all counters */
+ __raw_writel(PPMU_CCNT_MASK |
+ PPMU_PMCNT0_MASK |
+ PPMU_PMCNT1_MASK |
+ PPMU_PMCNT2_MASK |
+ PPMU_PMCNT3_MASK,
+ info->ppmu.base + PPMU_CNTENC);
+
+ /* Disable PPMU */
+ pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+ pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+ __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+ return 0;
+}
+
+static int exynos_ppmu_set_event(struct devfreq_event_dev *edev)
+{
+ struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+ int id = exynos_ppmu_find_ppmu_id(edev);
+ u32 pmnc, cntens;
+
+ if (id < 0)
+ return id;
+
+ /* Enable specific counter */
+ cntens = __raw_readl(info->ppmu.base + PPMU_CNTENS);
+ cntens |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+ __raw_writel(cntens, info->ppmu.base + PPMU_CNTENS);
+
+ /* Set the event of Read/Write data count */
+ __raw_writel(PPMU_RO_DATA_CNT | PPMU_WO_DATA_CNT,
+ info->ppmu.base + PPMU_BEVTxSEL(id));
+
+ /* Reset cycle counter/performance counter and enable PPMU */
+ pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+ pmnc &= ~(PPMU_PMNC_ENABLE_MASK
+ | PPMU_PMNC_COUNTER_RESET_MASK
+ | PPMU_PMNC_CC_RESET_MASK);
+ pmnc |= (PPMU_ENABLE << PPMU_PMNC_ENABLE_SHIFT);
+ pmnc |= (PPMU_ENABLE << PPMU_PMNC_COUNTER_RESET_SHIFT);
+ pmnc |= (PPMU_ENABLE << PPMU_PMNC_CC_RESET_SHIFT);
+ __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+ return 0;
+}
+
+static int exynos_ppmu_get_event(struct devfreq_event_dev *edev,
+ struct devfreq_event_data *edata)
+{
+ struct exynos_ppmu *info = devfreq_event_get_drvdata(edev);
+ int id = exynos_ppmu_find_ppmu_id(edev);
+ u32 pmnc, cntenc;
+
+ if (id < 0)
+ return -EINVAL;
+
+ /* Disable PPMU */
+ pmnc = __raw_readl(info->ppmu.base + PPMU_PMNC);
+ pmnc &= ~PPMU_PMNC_ENABLE_MASK;
+ __raw_writel(pmnc, info->ppmu.base + PPMU_PMNC);
+
+ /* Read cycle count */
+ edata->total_count = __raw_readl(info->ppmu.base + PPMU_CCNT);
+
+ /* Read performance count */
+ switch (id) {
+ case PPMU_PMNCNT0:
+ case PPMU_PMNCNT1:
+ case PPMU_PMNCNT2:
+ edata->load_count
+ = __raw_readl(info->ppmu.base + PPMU_PMNCT(id));
+ break;
+ case PPMU_PMNCNT3:
+ edata->load_count =
+ ((__raw_readl(info->ppmu.base + PPMU_PMCNT3_HIGH) << 8)
+ | __raw_readl(info->ppmu.base + PPMU_PMCNT3_LOW));
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Disable specific counter */
+ cntenc = __raw_readl(info->ppmu.base + PPMU_CNTENC);
+ cntenc |= (PPMU_CCNT_MASK | (PPMU_ENABLE << id));
+ __raw_writel(cntenc, info->ppmu.base + PPMU_CNTENC);
+
+ dev_dbg(&edev->dev, "%s (event: %ld/%ld)\n", edev->desc->name,
+ edata->load_count, edata->total_count);
+
+ return 0;
+}
+
+static struct devfreq_event_ops exynos_ppmu_ops = {
+ .disable = exynos_ppmu_disable,
+ .set_event = exynos_ppmu_set_event,
+ .get_event = exynos_ppmu_get_event,
+};
+
+static int of_get_devfreq_events(struct device_node *np,
+ struct exynos_ppmu *info)
+{
+ struct devfreq_event_desc *desc;
+ struct device *dev = info->dev;
+ struct device_node *events_np, *node;
+ int i, j, count;
+
+ events_np = of_get_child_by_name(np, "events");
+ if (!events_np) {
+ dev_err(dev,
+ "failed to get child node of devfreq-event devices\n");
+ return -EINVAL;
+ }
+
+ count = of_get_child_count(events_np);
+ desc = devm_kzalloc(dev, sizeof(*desc) * count, GFP_KERNEL);
+ if (!desc)
+ return -ENOMEM;
+ info->num_events = count;
+
+ j = 0;
+ for_each_child_of_node(events_np, node) {
+ for (i = 0; i < ARRAY_SIZE(ppmu_events); i++) {
+ if (!ppmu_events[i].name)
+ continue;
+
+ if (!of_node_cmp(node->name, ppmu_events[i].name))
+ break;
+ }
+
+ if (i == ARRAY_SIZE(ppmu_events)) {
+ dev_warn(dev,
+ "don't know how to configure events : %s\n",
+ node->name);
+ continue;
+ }
+
+ desc[j].ops = &exynos_ppmu_ops;
+ desc[j].driver_data = info;
+
+ of_property_read_string(node, "event-name", &desc[j].name);
+
+ j++;
+
+ of_node_put(node);
+ }
+ info->desc = desc;
+
+ of_node_put(events_np);
+
+ return 0;
+}
+
+static int exynos_ppmu_parse_dt(struct exynos_ppmu *info)
+{
+ struct device *dev = info->dev;
+ struct device_node *np = dev->of_node;
+ int ret = 0;
+
+ if (!np) {
+ dev_err(dev, "failed to find devicetree node\n");
+ return -EINVAL;
+ }
+
+ /* Maps the memory mapped IO to control PPMU register */
+ info->ppmu.base = of_iomap(np, 0);
+ if (IS_ERR_OR_NULL(info->ppmu.base)) {
+ dev_err(dev, "failed to map memory region\n");
+ return -ENOMEM;
+ }
+
+ info->ppmu.clk = devm_clk_get(dev, "ppmu");
+ if (IS_ERR(info->ppmu.clk)) {
+ info->ppmu.clk = NULL;
+ dev_warn(dev, "cannot get PPMU clock\n");
+ }
+
+ ret = of_get_devfreq_events(np, info);
+ if (ret < 0) {
+ dev_err(dev, "failed to parse exynos ppmu dt node\n");
+ goto err;
+ }
+
+ return 0;
+
+err:
+ iounmap(info->ppmu.base);
+
+ return ret;
+}
+
+static int exynos_ppmu_probe(struct platform_device *pdev)
+{
+ struct exynos_ppmu *info;
+ struct devfreq_event_dev **edev;
+ struct devfreq_event_desc *desc;
+ int i, ret = 0, size;
+
+ info = devm_kzalloc(&pdev->dev, sizeof(*info), GFP_KERNEL);
+ if (!info)
+ return -ENOMEM;
+
+ mutex_init(&info->lock);
+ info->dev = &pdev->dev;
+
+ /* Parse dt data to get resource */
+ ret = exynos_ppmu_parse_dt(info);
+ if (ret < 0) {
+ dev_err(&pdev->dev,
+ "failed to parse devicetree for resource\n");
+ return ret;
+ }
+ desc = info->desc;
+
+ size = sizeof(struct devfreq_event_dev *) * info->num_events;
+ info->edev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
+ if (!info->edev) {
+ dev_err(&pdev->dev,
+ "failed to allocate memory devfreq-event devices\n");
+ return -ENOMEM;
+ }
+ edev = info->edev;
+ platform_set_drvdata(pdev, info);
+
+ for (i = 0; i < info->num_events; i++) {
+ edev[i] = devm_devfreq_event_add_edev(&pdev->dev, &desc[i]);
+ if (IS_ERR(edev)) {
+ ret = PTR_ERR(edev);
+ dev_err(&pdev->dev,
+ "failed to add devfreq-event device\n");
+ goto err;
+ }
+ }
+
+ clk_prepare_enable(info->ppmu.clk);
+
+ return 0;
+err:
+ iounmap(info->ppmu.base);
+
+ return ret;
+}
+
+static int exynos_ppmu_remove(struct platform_device *pdev)
+{
+ struct exynos_ppmu *info = platform_get_drvdata(pdev);
+
+ clk_disable_unprepare(info->ppmu.clk);
+ iounmap(info->ppmu.base);
+
+ return 0;
+}
+
+static struct of_device_id exynos_ppmu_id_match[] = {
+ { .compatible = "samsung,exynos-ppmu", },
+ { /* sentinel */ },
+};
+
+static struct platform_driver exynos_ppmu_driver = {
+ .probe = exynos_ppmu_probe,
+ .remove = exynos_ppmu_remove,
+ .driver = {
+ .name = "exynos-ppmu",
+ .of_match_table = exynos_ppmu_id_match,
+ },
+};
+module_platform_driver(exynos_ppmu_driver);
+
+MODULE_DESCRIPTION("Exynos PPMU(Platform Performance Monitoring Unit) driver");
+MODULE_AUTHOR("Chanwoo Choi <cw00.choi@samsung.com>");
+MODULE_LICENSE("GPL");
diff --git a/drivers/devfreq/event/exynos-ppmu.h b/drivers/devfreq/event/exynos-ppmu.h
new file mode 100644
index 0000000..4e831d4
--- /dev/null
+++ b/drivers/devfreq/event/exynos-ppmu.h
@@ -0,0 +1,93 @@
+/*
+ * exynos_ppmu.h - EXYNOS PPMU header file
+ *
+ * Copyright (c) 2015 Samsung Electronics Co., Ltd.
+ * Author : Chanwoo Choi <cw00.choi@samsung.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __EXYNOS_PPMU_H__
+#define __EXYNOS_PPMU_H__
+
+enum ppmu_state {
+ PPMU_DISABLE = 0,
+ PPMU_ENABLE,
+};
+
+enum ppmu_counter {
+ PPMU_PMNCNT0 = 0,
+ PPMU_PMNCNT1,
+ PPMU_PMNCNT2,
+ PPMU_PMNCNT3,
+
+ PPMU_PMNCNT_MAX,
+};
+
+enum ppmu_event_type {
+ PPMU_RO_BUSY_CYCLE_CNT = 0x0,
+ PPMU_WO_BUSY_CYCLE_CNT = 0x1,
+ PPMU_RW_BUSY_CYCLE_CNT = 0x2,
+ PPMU_RO_REQUEST_CNT = 0x3,
+ PPMU_WO_REQUEST_CNT = 0x4,
+ PPMU_RO_DATA_CNT = 0x5,
+ PPMU_WO_DATA_CNT = 0x6,
+ PPMU_RO_LATENCY = 0x12,
+ PPMU_WO_LATENCY = 0x16,
+};
+
+enum ppmu_reg {
+ /* PPC control register */
+ PPMU_PMNC = 0x00,
+ PPMU_CNTENS = 0x10,
+ PPMU_CNTENC = 0x20,
+ PPMU_INTENS = 0x30,
+ PPMU_INTENC = 0x40,
+ PPMU_FLAG = 0x50,
+
+ /* Cycle Counter and Performance Event Counter Register */
+ PPMU_CCNT = 0x100,
+ PPMU_PMCNT0 = 0x110,
+ PPMU_PMCNT1 = 0x120,
+ PPMU_PMCNT2 = 0x130,
+ PPMU_PMCNT3_HIGH = 0x140,
+ PPMU_PMCNT3_LOW = 0x150,
+
+ /* Bus Event Generator */
+ PPMU_BEVT0SEL = 0x1000,
+ PPMU_BEVT1SEL = 0x1100,
+ PPMU_BEVT2SEL = 0x1200,
+ PPMU_BEVT3SEL = 0x1300,
+ PPMU_COUNTER_RESET = 0x1810,
+ PPMU_READ_OVERFLOW_CNT = 0x1810,
+ PPMU_READ_UNDERFLOW_CNT = 0x1814,
+ PPMU_WRITE_OVERFLOW_CNT = 0x1850,
+ PPMU_WRITE_UNDERFLOW_CNT = 0x1854,
+ PPMU_READ_PENDING_CNT = 0x1880,
+ PPMU_WRITE_PENDING_CNT = 0x1884
+};
+
+/* PMNC register */
+#define PPMU_PMNC_CC_RESET_SHIFT 2
+#define PPMU_PMNC_COUNTER_RESET_SHIFT 1
+#define PPMU_PMNC_ENABLE_SHIFT 0
+#define PPMU_PMNC_START_MODE_MASK BIT(16)
+#define PPMU_PMNC_CC_DIVIDER_MASK BIT(3)
+#define PPMU_PMNC_CC_RESET_MASK BIT(2)
+#define PPMU_PMNC_COUNTER_RESET_MASK BIT(1)
+#define PPMU_PMNC_ENABLE_MASK BIT(0)
+
+/* CNTENS/CNTENC/INTENS/INTENC/FLAG register */
+#define PPMU_CCNT_MASK BIT(31)
+#define PPMU_PMCNT3_MASK BIT(3)
+#define PPMU_PMCNT2_MASK BIT(2)
+#define PPMU_PMCNT1_MASK BIT(1)
+#define PPMU_PMCNT0_MASK BIT(0)
+
+/* PPMU_PMNCTx/PPMU_BETxSEL registers */
+#define PPMU_PMNCT(x) (PPMU_PMCNT0 + (0x10 * x))
+#define PPMU_BEVTxSEL(x) (PPMU_BEVT0SEL + (0x100 * x))
+
+#endif /* __EXYNOS_PPMU_H__ */
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 3/7] devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch adds the documentation for Exynos PPMU (Platform Performance
Monitoring Unit) devfreq-event driver.
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
.../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
diff --git a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
new file mode 100644
index 0000000..b54bf3a
--- /dev/null
+++ b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
@@ -0,0 +1,110 @@
+
+* Samsung Exynos PPMU (Platform Performance Monitoring Unit) device
+
+The Samsung Exynos SoC has PPMU (Platform Performance Monitoring Unit) for
+each IP. PPMU provides the primitive values to get performance data. These
+PPMU events provide information of the SoC's behaviors so that you may
+use to analyze system performance, to make behaviors visible and to count
+usages of each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D, MFC).
+The Exynos PPMU driver uses the devfreq-event class to provide event data
+to various devfreq devices. The devfreq devices would use the event data when
+derterming the current state of each IP.
+
+Required properties:
+- compatible: Should be "samsung,exynos-ppmu".
+- reg: physical base address of each PPMU and length of memory mapped region.
+
+Optional properties:
+- clock-names : the name of clock used by the PPMU, "ppmu"
+- clocks : phandles for clock specified in "clock-names" property
+- #clock-cells: should be 1.
+
+Example1 : PPMU nodes in exynos3250.dtsi are listed below.
+
+ ppmu_dmc0: ppmu_dmc0@106a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106a0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_dmc1: ppmu_dmc1@106b0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106b0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_cpu: ppmu_cpu@106c0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106c0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_rightbus: ppmu_rightbus@112a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x112a0000 0x2000>;
+ clocks = <&cmu CLK_PPMURIGHT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_leftbus: ppmu_leftbus0@116a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x116a0000 0x2000>;
+ clocks = <&cmu CLK_PPMULEFT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+Example2 : Events of each PPMU node in exynos3250-rinato.dts are listed below.
+
+ &ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+
+ ppmu_dmc0_2: ppmu-event2-dmc0 {
+ event-name = "ppmu-event2-dmc0";
+ };
+
+ ppmu_dmc0_1: ppmu-event1-dmc0 {
+ event-name = "ppmu-event1-dmc0";
+ };
+
+ ppmu_dmc0_0: ppmu-event0-dmc0 {
+ event-name = "ppmu-event0-dmc0";
+ };
+ };
+ };
+
+ &ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+ };
+
+ &ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+ };
+
+ &ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+ };
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 3/7] devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch adds the documentation for Exynos PPMU (Platform Performance
Monitoring Unit) devfreq-event driver.
Cc: MyungJoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
.../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++++++++++++++++++
1 file changed, 110 insertions(+)
create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
diff --git a/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
new file mode 100644
index 0000000..b54bf3a
--- /dev/null
+++ b/Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
@@ -0,0 +1,110 @@
+
+* Samsung Exynos PPMU (Platform Performance Monitoring Unit) device
+
+The Samsung Exynos SoC has PPMU (Platform Performance Monitoring Unit) for
+each IP. PPMU provides the primitive values to get performance data. These
+PPMU events provide information of the SoC's behaviors so that you may
+use to analyze system performance, to make behaviors visible and to count
+usages of each IP (DMC, CPU, RIGHTBUS, LEFTBUS, CAM interface, LCD, G3D, MFC).
+The Exynos PPMU driver uses the devfreq-event class to provide event data
+to various devfreq devices. The devfreq devices would use the event data when
+derterming the current state of each IP.
+
+Required properties:
+- compatible: Should be "samsung,exynos-ppmu".
+- reg: physical base address of each PPMU and length of memory mapped region.
+
+Optional properties:
+- clock-names : the name of clock used by the PPMU, "ppmu"
+- clocks : phandles for clock specified in "clock-names" property
+- #clock-cells: should be 1.
+
+Example1 : PPMU nodes in exynos3250.dtsi are listed below.
+
+ ppmu_dmc0: ppmu_dmc0 at 106a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106a0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_dmc1: ppmu_dmc1 at 106b0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106b0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_cpu: ppmu_cpu at 106c0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106c0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_rightbus: ppmu_rightbus at 112a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x112a0000 0x2000>;
+ clocks = <&cmu CLK_PPMURIGHT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_leftbus: ppmu_leftbus0 at 116a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x116a0000 0x2000>;
+ clocks = <&cmu CLK_PPMULEFT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+Example2 : Events of each PPMU node in exynos3250-rinato.dts are listed below.
+
+ &ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+
+ ppmu_dmc0_2: ppmu-event2-dmc0 {
+ event-name = "ppmu-event2-dmc0";
+ };
+
+ ppmu_dmc0_1: ppmu-event1-dmc0 {
+ event-name = "ppmu-event1-dmc0";
+ };
+
+ ppmu_dmc0_0: ppmu-event0-dmc0 {
+ event-name = "ppmu-event0-dmc0";
+ };
+ };
+ };
+
+ &ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+ };
+
+ &ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+ };
+
+ &ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+ };
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 4/7] ARM: dts: Add PPMU dt node for Exynos3250 SoC
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch add PPMU (Platform Performance Monitoring Unit) dt node
to estimate the utilization of each IP in Exynos SoC throught DEVFREQ Event
subsystem.
This patch adds following PPMU dt nodes:
- PPMU_DMC0 0x106a0000
- PPMU_DMC1 0x106b0000
- PPMU_RIGHTBUS 0x112A0000
- PPMU_LEFTBUS 0x116A0000
- PPMU_CAMIF 0x11AC0000
- PPMU_LCD0 0x11E40000
- PPMU_FSYS 0x12630000
- PPMU_3D 0x13220000
- PPMU_MFC 0x13660000
- PPMU_CPU 0x106c0000
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/boot/dts/exynos3250.dtsi | 74 +++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index d89fdf5..45513ed 100644
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -530,6 +530,80 @@
compatible = "arm,cortex-a7-pmu";
interrupts = <0 18 0>, <0 19 0>;
};
+
+ ppmu_dmc0: ppmu_dmc0@106a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106a0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_dmc1: ppmu_dmc1@106b0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106b0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_cpu: ppmu_cpu@106c0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106c0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_rightbus: ppmu_rightbus@112a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x112a0000 0x2000>;
+ clocks = <&cmu CLK_PPMURIGHT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_leftbus: ppmu_leftbus0@116a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x116a0000 0x2000>;
+ clocks = <&cmu CLK_PPMULEFT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_camif: ppmu_camif@11ac0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11ac0000 0x2000>;
+ clocks = <&cmu CLK_PPMUCAMIF>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_lcd0: ppmu_lcd0@11e40000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11e40000 0x2000>;
+ clocks = <&cmu CLK_PPMULCD0>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_fsys: ppmu_fsys@12630000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12630000 0x2000>;
+ clocks = <&cmu CLK_PPMUFILE>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_g3d: ppmu_g3d@13220000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13220000 0x2000>;
+ clocks = <&cmu CLK_PPMUG3D>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_mfc: ppmu_mfc@13660000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13660000 0x2000>;
+ clocks = <&cmu CLK_PPMUMFC_L>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
};
};
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 4/7] ARM: dts: Add PPMU dt node for Exynos3250 SoC
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch add PPMU (Platform Performance Monitoring Unit) dt node
to estimate the utilization of each IP in Exynos SoC throught DEVFREQ Event
subsystem.
This patch adds following PPMU dt nodes:
- PPMU_DMC0 0x106a0000
- PPMU_DMC1 0x106b0000
- PPMU_RIGHTBUS 0x112A0000
- PPMU_LEFTBUS 0x116A0000
- PPMU_CAMIF 0x11AC0000
- PPMU_LCD0 0x11E40000
- PPMU_FSYS 0x12630000
- PPMU_3D 0x13220000
- PPMU_MFC 0x13660000
- PPMU_CPU 0x106c0000
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/boot/dts/exynos3250.dtsi | 74 +++++++++++++++++++++++++++++++++++++++
1 file changed, 74 insertions(+)
diff --git a/arch/arm/boot/dts/exynos3250.dtsi b/arch/arm/boot/dts/exynos3250.dtsi
index d89fdf5..45513ed 100644
--- a/arch/arm/boot/dts/exynos3250.dtsi
+++ b/arch/arm/boot/dts/exynos3250.dtsi
@@ -530,6 +530,80 @@
compatible = "arm,cortex-a7-pmu";
interrupts = <0 18 0>, <0 19 0>;
};
+
+ ppmu_dmc0: ppmu_dmc0 at 106a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106a0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_dmc1: ppmu_dmc1 at 106b0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106b0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_cpu: ppmu_cpu at 106c0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106c0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_rightbus: ppmu_rightbus at 112a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x112a0000 0x2000>;
+ clocks = <&cmu CLK_PPMURIGHT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_leftbus: ppmu_leftbus0 at 116a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x116a0000 0x2000>;
+ clocks = <&cmu CLK_PPMULEFT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_camif: ppmu_camif at 11ac0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11ac0000 0x2000>;
+ clocks = <&cmu CLK_PPMUCAMIF>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_lcd0: ppmu_lcd0 at 11e40000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11e40000 0x2000>;
+ clocks = <&cmu CLK_PPMULCD0>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_fsys: ppmu_fsys at 12630000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12630000 0x2000>;
+ clocks = <&cmu CLK_PPMUFILE>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_g3d: ppmu_g3d at 13220000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13220000 0x2000>;
+ clocks = <&cmu CLK_PPMUG3D>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_mfc: ppmu_mfc at 13660000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13660000 0x2000>;
+ clocks = <&cmu CLK_PPMUMFC_L>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
};
};
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 5/7] ARM: dts: Add PPMU dt node for Exynos4 SoCs
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch add PPMU (Platform Performance Monitoring Unit) dt node for Exynos4
(Exynos4210/4212/4412) SoC. PPMU dt node is used to monitor the utilization of
each IP.
The Exynos4210/Exynos4212/Exynos4412 SoC includes following PPMUs:
- PPMU_DMC0 0x106A_0000
- PPMU_DMC1 0x106B_0000
- PPMU_CPU 0x106C_0000
- PPMU_ACP 0x10AE_0000
- PPMU_RIGHT_BUS 0x112A_0000
- PPMU_LEFT_BUS 0x116A_0000
- PPMU_FSYS 0x1263_0000
- PPMU_LCD0 0x11E4_0000
- PPMU_CAMIF 0x11AC_0000
- PPMU_IMAGE 0x12AA_0000
- PPMU_TV 0x12E4_0000
- PPMU_3D 0x1322_0000
- PPMU_MFC_LEFT 0x1366_0000
- PPMU_MFC_RIGHT 0x1367_0000
Additionally, the Exynos4210 SoC includes following PPMUs:
- PPMU_LCD1 0x1224_0000
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/boot/dts/exynos4.dtsi | 108 ++++++++++++++++++++++++++++++++++++++
arch/arm/boot/dts/exynos4210.dtsi | 8 +++
2 files changed, 116 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index b8168f1..70064dc 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -645,4 +645,112 @@
samsung,sysreg = <&sys_reg>;
status = "disabled";
};
+
+ ppmu_dmc0: ppmu_dmc0@106a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106a0000 0x2000>;
+ clocks = <&clock CLK_PPMUDMC0>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_dmc1: ppmu_dmc1@106b0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106b0000 0x2000>;
+ clocks = <&clock CLK_PPMUDMC1>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_cpu: ppmu_cpu@106c0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106c0000 0x2000>;
+ clocks = <&clock CLK_PPMUCPU>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_acp: ppmu_acp@10ae0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106e0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_rightbus: ppmu_rightbus@112a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x112a0000 0x2000>;
+ clocks = <&clock CLK_PPMURIGHT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_leftbus: ppmu_leftbus0@116a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x116a0000 0x2000>;
+ clocks = <&clock CLK_PPMULEFT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_camif: ppmu_camif@11ac0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11ac0000 0x2000>;
+ clocks = <&clock CLK_PPMUCAMIF>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_lcd0: ppmu_lcd0@11e40000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11e40000 0x2000>;
+ clocks = <&clock CLK_PPMULCD0>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_fsys: ppmu_g3d@12630000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12630000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_image: ppmu_image@12aa0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12aa0000 0x2000>;
+ clocks = <&clock CLK_PPMUIMAGE>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_tv: ppmu_tv@12e40000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12e40000 0x2000>;
+ clocks = <&clock CLK_PPMUTV>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_g3d: ppmu_g3d@13220000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13220000 0x2000>;
+ clocks = <&clock CLK_PPMUG3D>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_mfc_left: ppmu_mfc_left@13660000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13660000 0x2000>;
+ clocks = <&clock CLK_PPMUMFC_L>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_mfc_right: ppmu_mfc_right@13670000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13670000 0x2000>;
+ clocks = <&clock CLK_PPMUMFC_R>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
};
diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
index bcc9e63..b2598de 100644
--- a/arch/arm/boot/dts/exynos4210.dtsi
+++ b/arch/arm/boot/dts/exynos4210.dtsi
@@ -192,4 +192,12 @@
samsung,lcd-wb;
};
};
+
+ ppmu_lcd1: ppmu_lcd1@12240000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12240000 0x2000>;
+ clocks = <&clock CLK_PPMULCD1>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
};
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 5/7] ARM: dts: Add PPMU dt node for Exynos4 SoCs
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch add PPMU (Platform Performance Monitoring Unit) dt node for Exynos4
(Exynos4210/4212/4412) SoC. PPMU dt node is used to monitor the utilization of
each IP.
The Exynos4210/Exynos4212/Exynos4412 SoC includes following PPMUs:
- PPMU_DMC0 0x106A_0000
- PPMU_DMC1 0x106B_0000
- PPMU_CPU 0x106C_0000
- PPMU_ACP 0x10AE_0000
- PPMU_RIGHT_BUS 0x112A_0000
- PPMU_LEFT_BUS 0x116A_0000
- PPMU_FSYS 0x1263_0000
- PPMU_LCD0 0x11E4_0000
- PPMU_CAMIF 0x11AC_0000
- PPMU_IMAGE 0x12AA_0000
- PPMU_TV 0x12E4_0000
- PPMU_3D 0x1322_0000
- PPMU_MFC_LEFT 0x1366_0000
- PPMU_MFC_RIGHT 0x1367_0000
Additionally, the Exynos4210 SoC includes following PPMUs:
- PPMU_LCD1 0x1224_0000
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/boot/dts/exynos4.dtsi | 108 ++++++++++++++++++++++++++++++++++++++
arch/arm/boot/dts/exynos4210.dtsi | 8 +++
2 files changed, 116 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index b8168f1..70064dc 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -645,4 +645,112 @@
samsung,sysreg = <&sys_reg>;
status = "disabled";
};
+
+ ppmu_dmc0: ppmu_dmc0 at 106a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106a0000 0x2000>;
+ clocks = <&clock CLK_PPMUDMC0>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_dmc1: ppmu_dmc1 at 106b0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106b0000 0x2000>;
+ clocks = <&clock CLK_PPMUDMC1>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_cpu: ppmu_cpu at 106c0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106c0000 0x2000>;
+ clocks = <&clock CLK_PPMUCPU>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_acp: ppmu_acp at 10ae0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x106e0000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_rightbus: ppmu_rightbus at 112a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x112a0000 0x2000>;
+ clocks = <&clock CLK_PPMURIGHT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_leftbus: ppmu_leftbus0 at 116a0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x116a0000 0x2000>;
+ clocks = <&clock CLK_PPMULEFT>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_camif: ppmu_camif at 11ac0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11ac0000 0x2000>;
+ clocks = <&clock CLK_PPMUCAMIF>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_lcd0: ppmu_lcd0 at 11e40000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x11e40000 0x2000>;
+ clocks = <&clock CLK_PPMULCD0>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_fsys: ppmu_g3d at 12630000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12630000 0x2000>;
+ status = "disabled";
+ };
+
+ ppmu_image: ppmu_image at 12aa0000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12aa0000 0x2000>;
+ clocks = <&clock CLK_PPMUIMAGE>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_tv: ppmu_tv at 12e40000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12e40000 0x2000>;
+ clocks = <&clock CLK_PPMUTV>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_g3d: ppmu_g3d at 13220000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13220000 0x2000>;
+ clocks = <&clock CLK_PPMUG3D>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_mfc_left: ppmu_mfc_left at 13660000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13660000 0x2000>;
+ clocks = <&clock CLK_PPMUMFC_L>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
+
+ ppmu_mfc_right: ppmu_mfc_right at 13670000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x13670000 0x2000>;
+ clocks = <&clock CLK_PPMUMFC_R>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
};
diff --git a/arch/arm/boot/dts/exynos4210.dtsi b/arch/arm/boot/dts/exynos4210.dtsi
index bcc9e63..b2598de 100644
--- a/arch/arm/boot/dts/exynos4210.dtsi
+++ b/arch/arm/boot/dts/exynos4210.dtsi
@@ -192,4 +192,12 @@
samsung,lcd-wb;
};
};
+
+ ppmu_lcd1: ppmu_lcd1 at 12240000 {
+ compatible = "samsung,exynos-ppmu";
+ reg = <0x12240000 0x2000>;
+ clocks = <&clock CLK_PPMULCD1>;
+ clock-names = "ppmu";
+ status = "disabled";
+ };
};
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 6/7] ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch add PPMU dt node to Exynos3250-base Rinato/Monk board. The PPMU node
is used to get the utilization of DMC0/DMC1/LEFTBUS/RIGHTBUS Block.
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
---
arch/arm/boot/dts/exynos3250-monk.dts | 40 +++++++++++++++++++++++++++++++++
arch/arm/boot/dts/exynos3250-rinato.dts | 40 +++++++++++++++++++++++++++++++++
2 files changed, 80 insertions(+)
diff --git a/arch/arm/boot/dts/exynos3250-monk.dts b/arch/arm/boot/dts/exynos3250-monk.dts
index 24822aa..fcceb59 100644
--- a/arch/arm/boot/dts/exynos3250-monk.dts
+++ b/arch/arm/boot/dts/exynos3250-monk.dts
@@ -420,6 +420,46 @@
status = "okay";
};
+&ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+ };
+};
+
+&ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+};
+
+&ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+};
+
+&ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+};
+
&xusbxti {
clock-frequency = <24000000>;
};
diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 7cc52b5..9dd1ce1 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -595,6 +595,46 @@
status = "okay";
};
+&ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+ };
+};
+
+&ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+};
+
+&ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+};
+
+&ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+};
+
&xusbxti {
clock-frequency = <24000000>;
};
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 6/7] ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch add PPMU dt node to Exynos3250-base Rinato/Monk board. The PPMU node
is used to get the utilization of DMC0/DMC1/LEFTBUS/RIGHTBUS Block.
Cc: Kukjin Kim <kgene@kernel.org>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
---
arch/arm/boot/dts/exynos3250-monk.dts | 40 +++++++++++++++++++++++++++++++++
arch/arm/boot/dts/exynos3250-rinato.dts | 40 +++++++++++++++++++++++++++++++++
2 files changed, 80 insertions(+)
diff --git a/arch/arm/boot/dts/exynos3250-monk.dts b/arch/arm/boot/dts/exynos3250-monk.dts
index 24822aa..fcceb59 100644
--- a/arch/arm/boot/dts/exynos3250-monk.dts
+++ b/arch/arm/boot/dts/exynos3250-monk.dts
@@ -420,6 +420,46 @@
status = "okay";
};
+&ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+ };
+};
+
+&ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+};
+
+&ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+};
+
+&ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+};
+
&xusbxti {
clock-frequency = <24000000>;
};
diff --git a/arch/arm/boot/dts/exynos3250-rinato.dts b/arch/arm/boot/dts/exynos3250-rinato.dts
index 7cc52b5..9dd1ce1 100644
--- a/arch/arm/boot/dts/exynos3250-rinato.dts
+++ b/arch/arm/boot/dts/exynos3250-rinato.dts
@@ -595,6 +595,46 @@
status = "okay";
};
+&ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+ };
+};
+
+&ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+};
+
+&ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+};
+
+&ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+};
+
&xusbxti {
clock-frequency = <24000000>;
};
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 7/7] ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-26 4:16 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: myungjoo.ham, kgene
Cc: kyungmin.park, rafael.j.wysocki, mark.rutland, a.kesavan,
tomasz.figa, k.kozlowski, b.zolnierkie, robh+dt, sangbae90.lee,
inki.dae, cw00.choi, linux-pm, linux-kernel, linux-arm-kernel,
linux-samsung-soc
This patch add dt node for PPMU_{DMC0|DMC1|LEFTBUS|RIGHTBUS} for
exynos4412-trats2 board. Each PPMU dt node includes one event of 'PPMU Count3'.
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Myungjoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/boot/dts/exynos4412-trats2.dts | 40 +++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 29231b4..70eac85 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -865,6 +865,46 @@
};
};
+&ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+ };
+};
+
+&ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+};
+
+&ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+};
+
+&ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+};
+
&pinctrl_0 {
pinctrl-names = "default";
pinctrl-0 = <&sleep0>;
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v10 7/7] ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board
@ 2015-01-26 4:16 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-26 4:16 UTC (permalink / raw)
To: linux-arm-kernel
This patch add dt node for PPMU_{DMC0|DMC1|LEFTBUS|RIGHTBUS} for
exynos4412-trats2 board. Each PPMU dt node includes one event of 'PPMU Count3'.
Cc: Kukjin Kim <kgene@kernel.org>
Cc: Myungjoo Ham <myungjoo.ham@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: MyungJoo Ham <myungjoo.ham@samsung.com>
---
arch/arm/boot/dts/exynos4412-trats2.dts | 40 +++++++++++++++++++++++++++++++++
1 file changed, 40 insertions(+)
diff --git a/arch/arm/boot/dts/exynos4412-trats2.dts b/arch/arm/boot/dts/exynos4412-trats2.dts
index 29231b4..70eac85 100644
--- a/arch/arm/boot/dts/exynos4412-trats2.dts
+++ b/arch/arm/boot/dts/exynos4412-trats2.dts
@@ -865,6 +865,46 @@
};
};
+&ppmu_dmc0 {
+ status = "okay";
+
+ events {
+ ppmu_dmc0_3: ppmu-event3-dmc0 {
+ event-name = "ppmu-event3-dmc0";
+ };
+ };
+};
+
+&ppmu_dmc1 {
+ status = "okay";
+
+ events {
+ ppmu_dmc1_3: ppmu-event3-dmc1 {
+ event-name = "ppmu-event3-dmc1";
+ };
+ };
+};
+
+&ppmu_leftbus {
+ status = "okay";
+
+ events {
+ ppmu_leftbus_3: ppmu-event3-leftbus {
+ event-name = "ppmu-event3-leftbus";
+ };
+ };
+};
+
+&ppmu_rightbus {
+ status = "okay";
+
+ events {
+ ppmu_rightbus_3: ppmu-event3-rightbus {
+ event-name = "ppmu-event3-rightbus";
+ };
+ };
+};
+
&pinctrl_0 {
pinctrl-names = "default";
pinctrl-0 = <&sleep0>;
--
1.8.5.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH v10 0/7] devfreq: Add devfreq-event class to provide raw data for devfreq device
2015-01-26 4:16 ` Chanwoo Choi
@ 2015-01-30 0:44 ` Chanwoo Choi
-1 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-30 0:44 UTC (permalink / raw)
To: kgene
Cc: Chanwoo Choi, myungjoo.ham, kyungmin.park, rafael.j.wysocki,
mark.rutland, a.kesavan, tomasz.figa, k.kozlowski, b.zolnierkie,
robh+dt, sangbae90.lee, inki.dae, linux-pm, linux-kernel,
linux-arm-kernel, linux-samsung-soc
Dear Kukjin,
The patch(1-3) of this patchset is merged to linux-pm.git (Rafael J. Wysocki).
We can check it on following url:
- https://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=bleeding-edge&id=8bf997796bd9bc8e3f997f26cbac7dd2c6661a76
Could you please pick remaining patches(4-7) related to Exynos DT files?
Best Regards,
Chanwoo Choi
On 01/26/2015 01:16 PM, Chanwoo Choi wrote:
> This patchset add new devfreq_event class to provide raw data to determine
> current utilization of device which is used for devfreq governor.
>
> The following description explains the feature of two kind of devfreq class:
> - devfreq class (existing)
> : devfreq consumer device use raw data from devfreq_event device for
> determining proper current system state and change voltage/frequency
> dynamically using various governors.
> - devfreq_event class (new)
> : Provide measured raw data to devfreq device for governor
>
> Changelog:
>
> Changes from v9:
> (https://lkml.org/lkml/2015/1/20/68)
> - Fix the operation of enable_count in devfreq_event_{enable|disable}_edev().
>
> Changes from v8:
> (https://lkml.org/lkml/2015/1/12/299)
> - Fix issue of devfreq-event.c driver by Myunjoo's comment
> : Merge patch2 (resource-managed function) with patch1
> : Fix bug in devfreq_event_{enable|disable}_edev() about enable_count operation
> : Simplify error checking code in devfreq_event_get_event()
> : Define devfreq_event_get_drvdata() as static inline function type
> : Reduce the time of critical section scope in devfreq_event_remove_edev()
> : Rename field name of devfreq_event_data structure
> (total_event / event -> total_count / load_count)
> - Drop following patch[1] because Exynos5260 cannot be tested for exynos-ppmu.c driver
> [1] [PATCHv8 7/9] ARM: dts: Add PPMU dt node for Exynos5260 SoC
> - https://lkml.org/lkml/2015/1/12/301
> - Clean-up exynos-ppmu.c without update
>
> Changes from v7:
> (https://lkml.org/lkml/2015/1/7/795)
> - Use EXPORT_SYMBOL_GPL macro instead of EXPORT_SYMBOL
> - Fix the binding document of exynos-ppmu.c driver
> - Drop the devfreq-event type patch because it isnt' clear
> - Fix bug of devfreq_event_add_edev() when fail to execute device_register()
> - Modify resource free operation on following functions:
> : devfreq_event_remove_edev()
> : devfreq_event_release_edev()
>
> Changes from v6:
> (https://lkml.org/lkml/2014/12/28/139)
> - This patchset is based on v3.19-rc3.
> 1. devfreq-event class driver
> - Fix build break if devfreq-event framework is off
> - Add resource-managed function for devfreq-event device
> : devm_devfreq_event_add_edev()
> : devm_devfreq_event_remove_edev()
>
> Changes from v5:
> (https://lkml.org/lkml/2014/12/22/527)
> - Rebase these patch-set on v3.19-rc1 and Test it.
> 1. exynos-ppmu.c
> - Change the error value when of_iomap() fail to map the memory
> - Remove owner setting of platform_driver
> - Add exynos_ppmu_disable() function
> 2. exynos dts file
> - Add PPMU node to Exynos3250-based Monk board
> - Remove ppmu_cpu node on Exynos4412-based TRATS2 board and add ppmu_leftbus/rightbus node
>
> Changes from v4:
> (https://lkml.org/lkml/2014/12/16/511)
> 1. devfreq-event class driver
> - Add devfreq_event_get_edev_count() function
> - Modify the simple description of devfreq-event framework in devfreq-event.c
> - Minimize the usage range of global lock usage in devfreq_event_add_edev()
> - Remove '_is_enabled()' function pointer in devfreq_event_ops structure
> - Add separte CONFIG_PM_DEVFREQ_EVENT configuration
> - Add new devfreq-event.h header file including devfreq-event helper functions
> 2. exynos dts file
> - Add new patch to support PPMU with DEVFREQ-event on Exynos4412-based TRATS2
>
> Changes from v3:
> (https://lkml.org/lkml/2014/12/12/219)
> 1. devfreq-event class driver
> - Fix return value of devfreq_event_get_event()
> - Add new structure devfreq_event_data for devfreq_event_get_event()
> - Modify the prototype of devfreq_event_get_event() function
> - Call of_node_put after calling of_parse_phandle() to decrement refcount
> 2. exynos-ppmu driver
> - Modify usage of devfreq_event_get_event() function
> according to new prototype of this funciton
> - Add the additional description to exynos-ppmu.txt how to add PPMU node
> in board dts file
> - Use 'PPMU_EVENT' macro to remove duplicate codes
> - Add the support of PPMU for Exynos5260
> 3. exynos dts file
> - Add missing PPMU_FSYS node to exynos3250.dtsi
> - Fix 'ppmu_mfc_l' node name as 'ppmu_mfc' because exynos3250 has only one MFC IP.
> - Add missing PPMU_ACP/G3D to exynos4.dtsi
> 4. etc
> - Fix wrong abbreviation of PPMU (PPMU :Platform Performance Monitoring Unit)
> - Add new patch to support the PPMU of Exynos5260 SoC
>
> Changes from v2:
> (https://lkml.org/lkml/2014/12/9/304)
> 1. devfreq-event class driver
> - Rename all the helper functions of devfreq-event device
> - Add devfreq_event_remove_edev() instead of devfreq_put_event_dev()
> - Add devfreq_event_release_edev() to initialize it before put device
> - Add the detailed description of devfreq-event API
> - Add the attributes of devfreq-event class (enable_count)
> - Check the overflow about event/total_event data in devfreq_event_get_event()
> - Remove the 'exclusive flag' feature
> - Set set_event()/get_event() functions as mandary
> - Add missing of_node_put() call
> - Change variable type of 'get_event()' funciton from 'int' to 'u64'
> 2. exynos-ppmu driver
> - Remove un-used field (struct devfreq)
> - Use 'of_get_child_by_name()' instead of 'of_find_node_by_name()'
> - Add missing of_node_put() call
> - Fix wrong clock control
> - Use devfreq_event_remove_edev() instead of devfreq_remove_device()
> - Add the documentation for exynos-ppmu driver
> - Remove 'enable/disable/is_enabled/reset' function of exynos-ppmu driver
> 3. exynos3250-rinato.dts
> - Add ppmu_{leftbus|rightbus} dt node and remove ppmu_cpu dt node
>
> Changes from v1:
> (https://lkml.org/lkml/2014/9/5/11)
> - Code clean
> - Add the description of devfreq-event structure
> - Add 'is_enabled' function to devfreq_event_ops structure
> - Add 'enable_count' field to devfreq_event_dev structure
> - Check whether devfreq-event device is enabled or not
> during calling devfreq_event API
> - Define the type of devfreq-event device as following
> : DEVFREQ_EVENT_TYPE_RAW_DATA
> : DEVFREQ_EVENT_TYPE_UTILIZATION
> : DEVFREQ_EVENT_TYPE_BANDWIDTH
> : DEVFREQ_EVENT_TYPE_LATENCY
> - Add the exclusive feature of devfreq-event device.
> If devfreq-event device is used on only on devfreq driver,
> should used 'devfreq_enable_event_dev_exclusive()' function
> - Add new patch6 for test on Exynos3250-based Rinato board
>
> Chanwoo Choi (7):
> devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
> devfreq: event: Add exynos-ppmu devfreq-event driver
> devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
> ARM: dts: Add PPMU dt node for Exynos3250 SoC
> ARM: dts: Add PPMU dt node for Exynos4 SoCs
> ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board
> ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board
>
> .../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++
> arch/arm/boot/dts/exynos3250-monk.dts | 40 ++
> arch/arm/boot/dts/exynos3250-rinato.dts | 40 ++
> arch/arm/boot/dts/exynos3250.dtsi | 74 +++
> arch/arm/boot/dts/exynos4.dtsi | 108 +++++
> arch/arm/boot/dts/exynos4210.dtsi | 8 +
> arch/arm/boot/dts/exynos4412-trats2.dts | 40 ++
> drivers/devfreq/Kconfig | 2 +
> drivers/devfreq/Makefile | 6 +-
> drivers/devfreq/devfreq-event.c | 494 +++++++++++++++++++++
> drivers/devfreq/event/Kconfig | 25 ++
> drivers/devfreq/event/Makefile | 2 +
> drivers/devfreq/event/exynos-ppmu.c | 374 ++++++++++++++++
> drivers/devfreq/event/exynos-ppmu.h | 93 ++++
> include/linux/devfreq-event.h | 196 ++++++++
> 15 files changed, 1611 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
> create mode 100644 drivers/devfreq/devfreq-event.c
> create mode 100644 drivers/devfreq/event/Kconfig
> create mode 100644 drivers/devfreq/event/Makefile
> create mode 100644 drivers/devfreq/event/exynos-ppmu.c
> create mode 100644 drivers/devfreq/event/exynos-ppmu.h
> create mode 100644 include/linux/devfreq-event.h
>
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH v10 0/7] devfreq: Add devfreq-event class to provide raw data for devfreq device
@ 2015-01-30 0:44 ` Chanwoo Choi
0 siblings, 0 replies; 18+ messages in thread
From: Chanwoo Choi @ 2015-01-30 0:44 UTC (permalink / raw)
To: linux-arm-kernel
Dear Kukjin,
The patch(1-3) of this patchset is merged to linux-pm.git (Rafael J. Wysocki).
We can check it on following url:
- https://git.kernel.org/cgit/linux/kernel/git/rafael/linux-pm.git/commit/?h=bleeding-edge&id=8bf997796bd9bc8e3f997f26cbac7dd2c6661a76
Could you please pick remaining patches(4-7) related to Exynos DT files?
Best Regards,
Chanwoo Choi
On 01/26/2015 01:16 PM, Chanwoo Choi wrote:
> This patchset add new devfreq_event class to provide raw data to determine
> current utilization of device which is used for devfreq governor.
>
> The following description explains the feature of two kind of devfreq class:
> - devfreq class (existing)
> : devfreq consumer device use raw data from devfreq_event device for
> determining proper current system state and change voltage/frequency
> dynamically using various governors.
> - devfreq_event class (new)
> : Provide measured raw data to devfreq device for governor
>
> Changelog:
>
> Changes from v9:
> (https://lkml.org/lkml/2015/1/20/68)
> - Fix the operation of enable_count in devfreq_event_{enable|disable}_edev().
>
> Changes from v8:
> (https://lkml.org/lkml/2015/1/12/299)
> - Fix issue of devfreq-event.c driver by Myunjoo's comment
> : Merge patch2 (resource-managed function) with patch1
> : Fix bug in devfreq_event_{enable|disable}_edev() about enable_count operation
> : Simplify error checking code in devfreq_event_get_event()
> : Define devfreq_event_get_drvdata() as static inline function type
> : Reduce the time of critical section scope in devfreq_event_remove_edev()
> : Rename field name of devfreq_event_data structure
> (total_event / event -> total_count / load_count)
> - Drop following patch[1] because Exynos5260 cannot be tested for exynos-ppmu.c driver
> [1] [PATCHv8 7/9] ARM: dts: Add PPMU dt node for Exynos5260 SoC
> - https://lkml.org/lkml/2015/1/12/301
> - Clean-up exynos-ppmu.c without update
>
> Changes from v7:
> (https://lkml.org/lkml/2015/1/7/795)
> - Use EXPORT_SYMBOL_GPL macro instead of EXPORT_SYMBOL
> - Fix the binding document of exynos-ppmu.c driver
> - Drop the devfreq-event type patch because it isnt' clear
> - Fix bug of devfreq_event_add_edev() when fail to execute device_register()
> - Modify resource free operation on following functions:
> : devfreq_event_remove_edev()
> : devfreq_event_release_edev()
>
> Changes from v6:
> (https://lkml.org/lkml/2014/12/28/139)
> - This patchset is based on v3.19-rc3.
> 1. devfreq-event class driver
> - Fix build break if devfreq-event framework is off
> - Add resource-managed function for devfreq-event device
> : devm_devfreq_event_add_edev()
> : devm_devfreq_event_remove_edev()
>
> Changes from v5:
> (https://lkml.org/lkml/2014/12/22/527)
> - Rebase these patch-set on v3.19-rc1 and Test it.
> 1. exynos-ppmu.c
> - Change the error value when of_iomap() fail to map the memory
> - Remove owner setting of platform_driver
> - Add exynos_ppmu_disable() function
> 2. exynos dts file
> - Add PPMU node to Exynos3250-based Monk board
> - Remove ppmu_cpu node on Exynos4412-based TRATS2 board and add ppmu_leftbus/rightbus node
>
> Changes from v4:
> (https://lkml.org/lkml/2014/12/16/511)
> 1. devfreq-event class driver
> - Add devfreq_event_get_edev_count() function
> - Modify the simple description of devfreq-event framework in devfreq-event.c
> - Minimize the usage range of global lock usage in devfreq_event_add_edev()
> - Remove '_is_enabled()' function pointer in devfreq_event_ops structure
> - Add separte CONFIG_PM_DEVFREQ_EVENT configuration
> - Add new devfreq-event.h header file including devfreq-event helper functions
> 2. exynos dts file
> - Add new patch to support PPMU with DEVFREQ-event on Exynos4412-based TRATS2
>
> Changes from v3:
> (https://lkml.org/lkml/2014/12/12/219)
> 1. devfreq-event class driver
> - Fix return value of devfreq_event_get_event()
> - Add new structure devfreq_event_data for devfreq_event_get_event()
> - Modify the prototype of devfreq_event_get_event() function
> - Call of_node_put after calling of_parse_phandle() to decrement refcount
> 2. exynos-ppmu driver
> - Modify usage of devfreq_event_get_event() function
> according to new prototype of this funciton
> - Add the additional description to exynos-ppmu.txt how to add PPMU node
> in board dts file
> - Use 'PPMU_EVENT' macro to remove duplicate codes
> - Add the support of PPMU for Exynos5260
> 3. exynos dts file
> - Add missing PPMU_FSYS node to exynos3250.dtsi
> - Fix 'ppmu_mfc_l' node name as 'ppmu_mfc' because exynos3250 has only one MFC IP.
> - Add missing PPMU_ACP/G3D to exynos4.dtsi
> 4. etc
> - Fix wrong abbreviation of PPMU (PPMU :Platform Performance Monitoring Unit)
> - Add new patch to support the PPMU of Exynos5260 SoC
>
> Changes from v2:
> (https://lkml.org/lkml/2014/12/9/304)
> 1. devfreq-event class driver
> - Rename all the helper functions of devfreq-event device
> - Add devfreq_event_remove_edev() instead of devfreq_put_event_dev()
> - Add devfreq_event_release_edev() to initialize it before put device
> - Add the detailed description of devfreq-event API
> - Add the attributes of devfreq-event class (enable_count)
> - Check the overflow about event/total_event data in devfreq_event_get_event()
> - Remove the 'exclusive flag' feature
> - Set set_event()/get_event() functions as mandary
> - Add missing of_node_put() call
> - Change variable type of 'get_event()' funciton from 'int' to 'u64'
> 2. exynos-ppmu driver
> - Remove un-used field (struct devfreq)
> - Use 'of_get_child_by_name()' instead of 'of_find_node_by_name()'
> - Add missing of_node_put() call
> - Fix wrong clock control
> - Use devfreq_event_remove_edev() instead of devfreq_remove_device()
> - Add the documentation for exynos-ppmu driver
> - Remove 'enable/disable/is_enabled/reset' function of exynos-ppmu driver
> 3. exynos3250-rinato.dts
> - Add ppmu_{leftbus|rightbus} dt node and remove ppmu_cpu dt node
>
> Changes from v1:
> (https://lkml.org/lkml/2014/9/5/11)
> - Code clean
> - Add the description of devfreq-event structure
> - Add 'is_enabled' function to devfreq_event_ops structure
> - Add 'enable_count' field to devfreq_event_dev structure
> - Check whether devfreq-event device is enabled or not
> during calling devfreq_event API
> - Define the type of devfreq-event device as following
> : DEVFREQ_EVENT_TYPE_RAW_DATA
> : DEVFREQ_EVENT_TYPE_UTILIZATION
> : DEVFREQ_EVENT_TYPE_BANDWIDTH
> : DEVFREQ_EVENT_TYPE_LATENCY
> - Add the exclusive feature of devfreq-event device.
> If devfreq-event device is used on only on devfreq driver,
> should used 'devfreq_enable_event_dev_exclusive()' function
> - Add new patch6 for test on Exynos3250-based Rinato board
>
> Chanwoo Choi (7):
> devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
> devfreq: event: Add exynos-ppmu devfreq-event driver
> devfreq: event: Add documentation for exynos-ppmu devfreq-event driver
> ARM: dts: Add PPMU dt node for Exynos3250 SoC
> ARM: dts: Add PPMU dt node for Exynos4 SoCs
> ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board
> ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board
>
> .../bindings/devfreq/event/exynos-ppmu.txt | 110 +++++
> arch/arm/boot/dts/exynos3250-monk.dts | 40 ++
> arch/arm/boot/dts/exynos3250-rinato.dts | 40 ++
> arch/arm/boot/dts/exynos3250.dtsi | 74 +++
> arch/arm/boot/dts/exynos4.dtsi | 108 +++++
> arch/arm/boot/dts/exynos4210.dtsi | 8 +
> arch/arm/boot/dts/exynos4412-trats2.dts | 40 ++
> drivers/devfreq/Kconfig | 2 +
> drivers/devfreq/Makefile | 6 +-
> drivers/devfreq/devfreq-event.c | 494 +++++++++++++++++++++
> drivers/devfreq/event/Kconfig | 25 ++
> drivers/devfreq/event/Makefile | 2 +
> drivers/devfreq/event/exynos-ppmu.c | 374 ++++++++++++++++
> drivers/devfreq/event/exynos-ppmu.h | 93 ++++
> include/linux/devfreq-event.h | 196 ++++++++
> 15 files changed, 1611 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-ppmu.txt
> create mode 100644 drivers/devfreq/devfreq-event.c
> create mode 100644 drivers/devfreq/event/Kconfig
> create mode 100644 drivers/devfreq/event/Makefile
> create mode 100644 drivers/devfreq/event/exynos-ppmu.c
> create mode 100644 drivers/devfreq/event/exynos-ppmu.h
> create mode 100644 include/linux/devfreq-event.h
>
^ permalink raw reply [flat|nested] 18+ messages in thread
end of thread, other threads:[~2015-01-30 0:44 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2015-01-26 4:16 [PATCH v10 0/7] devfreq: Add devfreq-event class to provide raw data for devfreq device Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 2/7] devfreq: event: Add exynos-ppmu devfreq-event driver Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 3/7] devfreq: event: Add documentation for " Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 4/7] ARM: dts: Add PPMU dt node for Exynos3250 SoC Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 5/7] ARM: dts: Add PPMU dt node for Exynos4 SoCs Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 6/7] ARM: dts: exynos: Add PPMU node for Exynos3250-based Rinato/Monk board Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-26 4:16 ` [PATCH v10 7/7] ARM: dts: exynos: Add PPMU node for Exynos4412-based TRATS2 board Chanwoo Choi
2015-01-26 4:16 ` Chanwoo Choi
2015-01-30 0:44 ` [PATCH v10 0/7] devfreq: Add devfreq-event class to provide raw data for devfreq device Chanwoo Choi
2015-01-30 0:44 ` Chanwoo Choi
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