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Commit 77225310 authored by Linux Build Service Account's avatar Linux Build Service Account Committed by Gerrit - the friendly Code Review server
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Merge "devfreq: Add CPUBW HW monitor governor"

parents 08a9c39e 5559f6f6

Documentation/devicetree/bindings/arm/msm/kraitbw-l2pm.txt

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MSM Krait L2 performance monitor counters for bandwidth measurement device



krait-l2pm is a device that represents the Krait L2 PM counters that can be

used to measure the bandwidth of read/write traffic from the Krait CPU

subsystem.



Required properties:

- compatible:		Must be "qcom,kraitbw-l2pm"

- interrupts:		Lists the L2 PM counter overflow IRQ.

- qcom,bytes-per-beat:	The number of bytes transferred in one data beat from

			the Krait CPU subsystem.



Example:

	qcom,kraitbw-l2pm {

		compatible = "qcom,kraitbw-l2pm";

		interrupts = <0 1 1>;

		qcom,bytes-per-beat = <8>;

	};

arch/arm/mach-msm/Kconfig

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@@ -275,6 +275,7 @@ config MSM_KRAIT_TBB_ABORT_HANDLER 
config  ARCH_MSM_KRAIT

	bool

	select ARM_L1_CACHE_SHIFT_6

	select DEVFREQ_GOV_MSM_CPUBW_HWMON



config  MSM_CORTEX_A7

	bool

arch/arm/mach-msm/devfreq_cpubw.c

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@@ -113,7 +113,9 @@ static struct devfreq_governor_data gov_data[] = { 
	{ .name = "powersave" },

	{ .name = "userspace" },

	{ .name = "msm_cpufreq" },

	{ .name = "cpubw_hwmon", .data = &gov_ab },

};



struct devfreq_dev_profile cpubw_profile = {

	.polling_ms = 50,

	.target = cpubw_target,

drivers/devfreq/Kconfig

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@@ -79,6 +79,17 @@ config DEVFREQ_GOV_MSM_CPUFREQ 
	  to DDR BW vote based on the current CPU frequency.  This governor

	  is unlikely to be useful for non-MSM devices.



config DEVFREQ_GOV_MSM_CPUBW_HWMON

	tristate "HW monitor based governor for CPUBW"

	depends on ARCH_MSM_KRAIT

	help

	  HW monitor based governor for CPU to DDR bandwidth voting. This

	  governor currently supports only Krait L2 PM counters.  Sets the CPU

	  BW vote by using L2 PM counters to monitor the Krait's use of DDR.

	  Since this governor uses some of the PM counters it can conflict

	  with existing profiling tools.  This governor is unlikely to be

	  useful for other devices.



comment "DEVFREQ Drivers"



config ARM_EXYNOS4_BUS_DEVFREQ

drivers/devfreq/Makefile

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@@ -5,6 +5,7 @@ obj-$(CONFIG_DEVFREQ_GOV_POWERSAVE) += governor_powersave.o 
obj-$(CONFIG_DEVFREQ_GOV_USERSPACE)	+= governor_userspace.o

obj-$(CONFIG_DEVFREQ_GOV_MSM_ADRENO_TZ)	+= governor_msm_adreno_tz.o

obj-$(CONFIG_DEVFREQ_GOV_MSM_CPUFREQ)	+= governor_msm_cpufreq.o

obj-$(CONFIG_DEVFREQ_GOV_MSM_CPUBW_HWMON)	+= governor_cpubw_hwmon.o



# DEVFREQ Drivers

obj-$(CONFIG_ARM_EXYNOS4_BUS_DEVFREQ)	+= exynos4_bus.o