drivers/devfreq/Kconfig

menuconfig PM_DEVFREQ
	bool "Generic Dynamic Voltage and Frequency Scaling (DVFS) support"
	select SRCU
	help
	  A device may have a list of frequencies and voltages available.
	  devfreq, a generic DVFS framework can be registered for a device
	  in order to let the governor provided to devfreq choose an
	  operating frequency based on the device driver's policy.

	  Each device may have its own governor and policy. Devfreq can
	  reevaluate the device state periodically and/or based on the
	  notification to "nb", a notifier block, of devfreq.

	  Like some CPUs with CPUfreq, a device may have multiple clocks.
	  However, because the clock frequencies of a single device are
	  determined by the single device's state, an instance of devfreq
	  is attached to a single device and returns a "representative"
	  clock frequency of the device, which is also attached
	  to a device by 1-to-1. The device registering devfreq takes the
	  responsibility to "interpret" the representative frequency and
	  to set its every clock accordingly with the "target" callback
	  given to devfreq.

	  When OPP is used with the devfreq device, it is recommended to
	  register devfreq's nb to the OPP's notifier head.  If OPP is
	  used with the devfreq device, you may use OPP helper
	  functions defined in devfreq.h.

if PM_DEVFREQ

comment "DEVFREQ Governors"

config DEVFREQ_GOV_SIMPLE_ONDEMAND
	tristate "Simple Ondemand"
	help
	  Chooses frequency based on the recent load on the device. Works
	  similar as ONDEMAND governor of CPUFREQ does. A device with
	  Simple-Ondemand should be able to provide busy/total counter
	  values that imply the usage rate. A device may provide tuned
	  values to the governor with data field at devfreq_add_device().

config DEVFREQ_GOV_PERFORMANCE
	tristate "Performance"
	help
	  Sets the frequency at the maximum available frequency.
	  This governor always returns UINT_MAX as frequency so that
	  the DEVFREQ framework returns the highest frequency available
	  at any time.

config DEVFREQ_GOV_POWERSAVE
	tristate "Powersave"
	help
	  Sets the frequency at the minimum available frequency.
	  This governor always returns 0 as frequency so that
	  the DEVFREQ framework returns the lowest frequency available
	  at any time.

config DEVFREQ_GOV_USERSPACE
	tristate "Userspace"
	help
	  Sets the frequency at the user specified one.
	  This governor returns the user configured frequency if there
	  has been an input to /sys/devices/.../power/devfreq_set_freq.
	  Otherwise, the governor does not change the frequency
	  given at the initialization.

config DEVFREQ_GOV_PASSIVE
	tristate "Passive"
	help
	  Sets the frequency based on the frequency of its parent devfreq
	  device. This governor does not change the frequency by itself
	  through sysfs entries. The passive governor recommends that
	  devfreq device uses the OPP table to get the frequency/voltage.

config DEVFREQ_GOV_CPUFREQ
	tristate "CPUfreq"
	depends on CPU_FREQ
	help
	  Chooses frequency based on the online CPUs' current frequency and a
	  CPU frequency to device frequency mapping table(s). This governor
	  can be useful for controlling devices such as DDR, cache, CCI, etc.

config QCOM_BIMC_BWMON
	tristate "QCOM BIMC Bandwidth monitor hardware"
	depends on ARCH_QCOM
	help
	  The BIMC Bandwidth monitor hardware allows for monitoring the
	  traffic coming from each master port connected to the BIMC. It also
	  has the capability to raise an IRQ when the count exceeds a
	  programmable limit.

config ARM_MEMLAT_MON
	tristate "ARM CPU Memory Latency monitor hardware"
	depends on ARCH_QCOM
	help
	  The PMU present on these ARM cores allow for the use of counters to
	  monitor the memory latency characteristics of an ARM CPU workload.
	  This driver uses these counters to implement the APIs needed by
	  the mem_latency devfreq governor.

config QCOMCCI_HWMON
	tristate "QTI CCI Cache monitor hardware"
	depends on ARCH_QCOM
	help
	  QTI CCI has additional PMU counters that can be used to monitor
	  cache requests. QTI CCI hardware monitor device configures these
	  registers to monitor cache and inform governor. It can also set an
	  IRQ when count exceeds a programmable limit.

config QCOM_M4M_HWMON
	tristate "QCOM M4M cache monitor hardware"
	depends on ARCH_QCOM
	help
	  QCOM M4M has counters that can be used to monitor requests coming to
	  M4M. QCOM M4M hardware monitor device programs corresponding registers
	  to monitor cache and inform governor. It can also set an IRQ when
	  count exceeds a programmable limit.

config DEVFREQ_GOV_QCOM_BW_HWMON
	tristate "HW monitor based governor for device BW"
	depends on QCOM_BIMC_BWMON
	help
	  HW monitor based governor for device to DDR bandwidth voting.
	  This governor sets the CPU BW vote by using BIMC counters to monitor
	  the CPU's use of DDR. Since this uses target specific counters it
	  can conflict with existing profiling tools.  This governor is unlikely
	  to be useful for non-QCOM devices.

config DEVFREQ_GOV_QCOM_CACHE_HWMON
	tristate "HW monitor based governor for cache frequency"
	help
	  HW monitor based governor for cache frequency scaling. This
	  governor sets the cache frequency by using PM counters to monitor the
	  CPU's use of cache. 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.

config DEVFREQ_GOV_MEMLAT
	tristate "HW monitor based governor for device BW"
	depends on ARM_MEMLAT_MON
	help
	  HW monitor based governor for device to DDR bandwidth voting.
	  This governor sets the CPU BW vote based on stats obtained from memalat
	  monitor if it determines that a workload is memory latency bound. Since
	  this uses target specific counters it can conflict with existing profiling
	  tools.

comment "DEVFREQ Drivers"

config DEVFREQ_GOV_QCOM_ADRENO_TZ
	tristate "Qualcomm Technologies Inc Adreno Trustzone"
	depends on QCOM_KGSL && QCOM_SCM
	help
	   Trustzone based governor for the Adreno GPU. Sets
	   the frequency using a "on-demand" algorithm. This
	   governor is unlikely to be useful for other
	   devices.

config DEVFREQ_GOV_QCOM_GPUBW_MON
	tristate "GPU BW voting governor"
	depends on DEVFREQ_GOV_QCOM_ADRENO_TZ
	help
	  This governor works together with Adreno Trustzone governor,
	  and select bus frequency votes using an "on-demand" alorithm.
	  This governor is unlikely to be useful for non-Adreno
	  devices.

config ARM_EXYNOS_BUS_DEVFREQ
	tristate "ARM EXYNOS Generic Memory Bus DEVFREQ Driver"
	depends on ARCH_EXYNOS || COMPILE_TEST
	select DEVFREQ_GOV_SIMPLE_ONDEMAND
	select DEVFREQ_GOV_PASSIVE
	select DEVFREQ_EVENT_EXYNOS_PPMU
	select PM_DEVFREQ_EVENT
	select PM_OPP
	help
	  This adds the common DEVFREQ driver for Exynos Memory bus. Exynos
	  Memory bus has one more group of memory bus (e.g, MIF and INT block).
	  Each memory bus group could contain many memoby bus block. It reads
	  PPMU counters of memory controllers by using DEVFREQ-event device
	  and adjusts the operating frequencies and voltages with OPP support.
	  This does not yet operate with optimal voltages.

config ARM_TEGRA_DEVFREQ
	tristate "Tegra DEVFREQ Driver"
	depends on ARCH_TEGRA_124_SOC
	select DEVFREQ_GOV_SIMPLE_ONDEMAND
	select PM_OPP
	help
	  This adds the DEVFREQ driver for the Tegra family of SoCs.
	  It reads ACTMON counters of memory controllers and adjusts the
	  operating frequencies and voltages with OPP support.

config ARM_RK3399_DMC_DEVFREQ
	tristate "ARM RK3399 DMC DEVFREQ Driver"
	depends on ARCH_ROCKCHIP
	select DEVFREQ_EVENT_ROCKCHIP_DFI
	select DEVFREQ_GOV_SIMPLE_ONDEMAND
	select PM_DEVFREQ_EVENT
	select PM_OPP
	help
          This adds the DEVFREQ driver for the RK3399 DMC(Dynamic Memory Controller).
          It sets the frequency for the memory controller and reads the usage counts
          from hardware.

config DEVFREQ_SIMPLE_DEV
	tristate "Device driver for simple clock device with no status info"
	select DEVFREQ_GOV_PERFORMANCE
	select DEVFREQ_GOV_POWERSAVE
	select DEVFREQ_GOV_USERSPACE
	select DEVFREQ_GOV_CPUFREQ
	help
	  Device driver for simple devices that control their frequency using
	  clock APIs and don't have any form of status reporting.

config QCOM_DEVFREQ_DEVBW
	bool "Qualcomm Technologies Inc. DEVFREQ device for device master <-> slave IB/AB BW voting"
	depends on ARCH_QCOM
	select DEVFREQ_GOV_PERFORMANCE
	select DEVFREQ_GOV_POWERSAVE
	select DEVFREQ_GOV_USERSPACE
	select DEVFREQ_GOV_CPUFREQ
	default n
	help
	  Different devfreq governors use this devfreq device to make CPU to
	  DDR IB/AB bandwidth votes. This driver provides a SoC topology
	  agnostic interface to so that some of the devfreq governors can be
	  shared across SoCs.

source "drivers/devfreq/event/Kconfig"

endif # PM_DEVFREQ