Re: [RFC PATCHv2 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
On pią, 2014-12-12 at 12:42 +0900, Chanwoo Choi wrote: Hi Krzysztof, I replied again this mail because I'll use the mutex for set_event()/get_event() according to your comment. But, of_parse_phandle() seems that this function don't need the of_node_put() function. On 12/11/2014 11:13 AM, Chanwoo Choi wrote: Hi Krzysztof, First of all, thanks for your review. On 12/10/2014 06:37 PM, Krzysztof Kozlowski wrote: On wto, 2014-12-09 at 23:13 +0900, Chanwoo Choi wrote: 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@samsung.com Cc: Kyungmin Park kyungmin.p...@samsung.com Signed-off-by: Chanwoo Choi cw00.c...@samsung.com --- drivers/devfreq/Kconfig | 2 + drivers/devfreq/Makefile| 5 +- drivers/devfreq/devfreq-event.c | 302 drivers/devfreq/event/Makefile | 1 + include/linux/devfreq.h | 141 +++ 5 files changed, 450 insertions(+), 1 deletion(-) create mode 100644 drivers/devfreq/devfreq-event.c create mode 100644 drivers/devfreq/event/Makefile diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70..4d15b62 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. +comment DEVFREQ Event Drivers + endif # PM_DEVFREQ diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 16138c9..a1ffabe 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_PM_DEVFREQ) += devfreq.o +obj-$(CONFIG_PM_DEVFREQ) += devfreq.o devfreq-event.o obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND)+= governor_simpleondemand.o obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE)+= governor_performance.o obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o @@ -7,3 +7,6 @@ obj-$(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/ diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c new file mode 100644 index 000..b47329f --- /dev/null +++ b/drivers/devfreq/devfreq-event.c @@ -0,0 +1,302 @@ +/* + * devfreq-event: Generic DEVFREQ Event class driver + * + * Copyright (C) 2014 Samsung Electronics + * Chanwoo Choi cw00.c...@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/kernel.h +#include linux/sched.h +#include linux/errno.h +#include linux/err.h
Re: [RFC PATCHv2 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
Hi Krzysztof, On 12/15/2014 07:30 PM, Krzysztof Kozlowski wrote: On pią, 2014-12-12 at 12:42 +0900, Chanwoo Choi wrote: Hi Krzysztof, I replied again this mail because I'll use the mutex for set_event()/get_event() according to your comment. But, of_parse_phandle() seems that this function don't need the of_node_put() function. On 12/11/2014 11:13 AM, Chanwoo Choi wrote: Hi Krzysztof, First of all, thanks for your review. On 12/10/2014 06:37 PM, Krzysztof Kozlowski wrote: On wto, 2014-12-09 at 23:13 +0900, Chanwoo Choi wrote: 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@samsung.com Cc: Kyungmin Park kyungmin.p...@samsung.com Signed-off-by: Chanwoo Choi cw00.c...@samsung.com --- drivers/devfreq/Kconfig | 2 + drivers/devfreq/Makefile| 5 +- drivers/devfreq/devfreq-event.c | 302 drivers/devfreq/event/Makefile | 1 + include/linux/devfreq.h | 141 +++ 5 files changed, 450 insertions(+), 1 deletion(-) create mode 100644 drivers/devfreq/devfreq-event.c create mode 100644 drivers/devfreq/event/Makefile diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70..4d15b62 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. +comment DEVFREQ Event Drivers + endif # PM_DEVFREQ diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 16138c9..a1ffabe 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_PM_DEVFREQ) += devfreq.o +obj-$(CONFIG_PM_DEVFREQ) += devfreq.o devfreq-event.o obj-$(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 +7,6 @@ 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/ diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c new file mode 100644 index 000..b47329f --- /dev/null +++ b/drivers/devfreq/devfreq-event.c @@ -0,0 +1,302 @@ +/* + * devfreq-event: Generic DEVFREQ Event class driver + * + * Copyright (C) 2014 Samsung Electronics + * Chanwoo Choi cw00.c...@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/kernel.h +#include linux/sched.h +#include linux/errno.h +#include linux/err.h +#include linux/init.h +#include linux/module.h +#include
Re: [RFC PATCHv2 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
Hi Krzysztof, I replied again this mail because I'll use the mutex for set_event()/get_event() according to your comment. But, of_parse_phandle() seems that this function don't need the of_node_put() function. On 12/11/2014 11:13 AM, Chanwoo Choi wrote: Hi Krzysztof, First of all, thanks for your review. On 12/10/2014 06:37 PM, Krzysztof Kozlowski wrote: On wto, 2014-12-09 at 23:13 +0900, Chanwoo Choi wrote: 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@samsung.com Cc: Kyungmin Park kyungmin.p...@samsung.com Signed-off-by: Chanwoo Choi cw00.c...@samsung.com --- drivers/devfreq/Kconfig | 2 + drivers/devfreq/Makefile| 5 +- drivers/devfreq/devfreq-event.c | 302 drivers/devfreq/event/Makefile | 1 + include/linux/devfreq.h | 141 +++ 5 files changed, 450 insertions(+), 1 deletion(-) create mode 100644 drivers/devfreq/devfreq-event.c create mode 100644 drivers/devfreq/event/Makefile diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70..4d15b62 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. +comment DEVFREQ Event Drivers + endif # PM_DEVFREQ diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 16138c9..a1ffabe 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_PM_DEVFREQ) += devfreq.o +obj-$(CONFIG_PM_DEVFREQ) += devfreq.o devfreq-event.o obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE)+= governor_powersave.o @@ -7,3 +7,6 @@ obj-$(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/ diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c new file mode 100644 index 000..b47329f --- /dev/null +++ b/drivers/devfreq/devfreq-event.c @@ -0,0 +1,302 @@ +/* + * devfreq-event: Generic DEVFREQ Event class driver + * + * Copyright (C) 2014 Samsung Electronics + * Chanwoo Choi cw00.c...@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/kernel.h +#include linux/sched.h +#include linux/errno.h +#include linux/err.h +#include linux/init.h +#include linux/module.h +#include linux/slab.h +#include linux/stat.h +#include linux/pm_opp.h +#include linux/devfreq.h +#include linux/workqueue.h +#include
Re: [RFC PATCHv2 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
On wto, 2014-12-09 at 23:13 +0900, Chanwoo Choi wrote: 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@samsung.com Cc: Kyungmin Park kyungmin.p...@samsung.com Signed-off-by: Chanwoo Choi cw00.c...@samsung.com --- drivers/devfreq/Kconfig | 2 + drivers/devfreq/Makefile| 5 +- drivers/devfreq/devfreq-event.c | 302 drivers/devfreq/event/Makefile | 1 + include/linux/devfreq.h | 141 +++ 5 files changed, 450 insertions(+), 1 deletion(-) create mode 100644 drivers/devfreq/devfreq-event.c create mode 100644 drivers/devfreq/event/Makefile diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70..4d15b62 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. +comment DEVFREQ Event Drivers + endif # PM_DEVFREQ diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 16138c9..a1ffabe 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_PM_DEVFREQ) += devfreq.o +obj-$(CONFIG_PM_DEVFREQ) += devfreq.o devfreq-event.o obj-$(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 +7,6 @@ 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/ diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c new file mode 100644 index 000..b47329f --- /dev/null +++ b/drivers/devfreq/devfreq-event.c @@ -0,0 +1,302 @@ +/* + * devfreq-event: Generic DEVFREQ Event class driver + * + * Copyright (C) 2014 Samsung Electronics + * Chanwoo Choi cw00.c...@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/kernel.h +#include linux/sched.h +#include linux/errno.h +#include linux/err.h +#include linux/init.h +#include linux/module.h +#include linux/slab.h +#include linux/stat.h +#include linux/pm_opp.h +#include linux/devfreq.h +#include linux/workqueue.h +#include linux/platform_device.h +#include linux/list.h +#include linux/printk.h +#include linux/hrtimer.h +#include linux/of.h +#include governor.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)
Re: [RFC PATCHv2 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
Hi Krzysztof, First of all, thanks for your review. On 12/10/2014 06:37 PM, Krzysztof Kozlowski wrote: On wto, 2014-12-09 at 23:13 +0900, Chanwoo Choi wrote: 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@samsung.com Cc: Kyungmin Park kyungmin.p...@samsung.com Signed-off-by: Chanwoo Choi cw00.c...@samsung.com --- drivers/devfreq/Kconfig | 2 + drivers/devfreq/Makefile| 5 +- drivers/devfreq/devfreq-event.c | 302 drivers/devfreq/event/Makefile | 1 + include/linux/devfreq.h | 141 +++ 5 files changed, 450 insertions(+), 1 deletion(-) create mode 100644 drivers/devfreq/devfreq-event.c create mode 100644 drivers/devfreq/event/Makefile diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70..4d15b62 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. +comment DEVFREQ Event Drivers + endif # PM_DEVFREQ diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 16138c9..a1ffabe 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_PM_DEVFREQ)+= devfreq.o +obj-$(CONFIG_PM_DEVFREQ)+= devfreq.o devfreq-event.o obj-$(CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND) += governor_simpleondemand.o obj-$(CONFIG_DEVFREQ_GOV_PERFORMANCE) += governor_performance.o obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o @@ -7,3 +7,6 @@ obj-$(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/ diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c new file mode 100644 index 000..b47329f --- /dev/null +++ b/drivers/devfreq/devfreq-event.c @@ -0,0 +1,302 @@ +/* + * devfreq-event: Generic DEVFREQ Event class driver + * + * Copyright (C) 2014 Samsung Electronics + * Chanwoo Choi cw00.c...@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/kernel.h +#include linux/sched.h +#include linux/errno.h +#include linux/err.h +#include linux/init.h +#include linux/module.h +#include linux/slab.h +#include linux/stat.h +#include linux/pm_opp.h +#include linux/devfreq.h +#include linux/workqueue.h +#include linux/platform_device.h +#include linux/list.h +#include linux/printk.h +#include linux/hrtimer.h +#include linux/of.h +#include governor.h + +static struct class *devfreq_event_class; + +/* The list of all devfreq event list */ +static
[RFC PATCHv2 1/7] devfreq: event: Add new devfreq_event class to provide basic data for devfreq governor
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@samsung.com Cc: Kyungmin Park kyungmin.p...@samsung.com Signed-off-by: Chanwoo Choi cw00.c...@samsung.com --- drivers/devfreq/Kconfig | 2 + drivers/devfreq/Makefile| 5 +- drivers/devfreq/devfreq-event.c | 302 drivers/devfreq/event/Makefile | 1 + include/linux/devfreq.h | 141 +++ 5 files changed, 450 insertions(+), 1 deletion(-) create mode 100644 drivers/devfreq/devfreq-event.c create mode 100644 drivers/devfreq/event/Makefile diff --git a/drivers/devfreq/Kconfig b/drivers/devfreq/Kconfig index faf4e70..4d15b62 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. +comment DEVFREQ Event Drivers + endif # PM_DEVFREQ diff --git a/drivers/devfreq/Makefile b/drivers/devfreq/Makefile index 16138c9..a1ffabe 100644 --- a/drivers/devfreq/Makefile +++ b/drivers/devfreq/Makefile @@ -1,4 +1,4 @@ -obj-$(CONFIG_PM_DEVFREQ) += devfreq.o +obj-$(CONFIG_PM_DEVFREQ) += devfreq.o devfreq-event.o obj-$(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 +7,6 @@ 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/ diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c new file mode 100644 index 000..b47329f --- /dev/null +++ b/drivers/devfreq/devfreq-event.c @@ -0,0 +1,302 @@ +/* + * devfreq-event: Generic DEVFREQ Event class driver + * + * Copyright (C) 2014 Samsung Electronics + * Chanwoo Choi cw00.c...@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/kernel.h +#include linux/sched.h +#include linux/errno.h +#include linux/err.h +#include linux/init.h +#include linux/module.h +#include linux/slab.h +#include linux/stat.h +#include linux/pm_opp.h +#include linux/devfreq.h +#include linux/workqueue.h +#include linux/platform_device.h +#include linux/list.h +#include linux/printk.h +#include linux/hrtimer.h +#include linux/of.h +#include governor.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) + +struct devfreq_event_dev *devfreq_add_event_device(struct device *dev, + struct devfreq_event_desc
