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linux/drivers/thermal/Kconfig
Quentin Perret a4e893e802 thermal: cpu_cooling: Migrate to using the EM framework 
The newly introduced Energy Model framework manages power cost tables in
a generic way. Moreover, it supports several types of models since the
tables can come from DT or firmware (through SCMI) for example. On the
other hand, the cpu_cooling subsystem manages its own power cost tables
using only DT data.

In order to avoid the duplication of data in the kernel, and in order to
enable IPA with EMs coming from more than just DT, remove the private
tables from cpu_cooling.c and migrate it to using the centralized EM
framework. Doing so should have no visible functional impact for
existing users of IPA since:

 - recent extenstions to the the PM_OPP infrastructure enable the
   registration of EMs in PM_EM using the DT property used by IPA;

 - the existing upstream cpufreq drivers marked with the
   'CPUFREQ_IS_COOLING_DEV' flag all use the aforementioned PM_OPP
   infrastructure, which means they all support PM_EM. The only two
   exceptions are qoriq-cpufreq which doesn't in fact use an EM and
   scmi-cpufreq which doesn't use DT for power costs.

For existing users of cpu_cooling, PM_EM tables will contain the exact
same power values that IPA used to compute on its own until now. The
only new dependency for them is to compile in CONFIG_ENERGY_MODEL.

The case where the thermal subsystem is used without an Energy Model
(cpufreq_cooling_ops) is handled by looking directly at CPUFreq's
frequency table which is already a dependency for cpu_cooling.c anyway.
Since the thermal framework expects the cooling states in a particular
order, bail out whenever the CPUFreq table is unsorted, since that is
fairly uncommon in general, and there are currently no users of
cpu_cooling for this use-case.

Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20191030151451.7961-5-qperret@google.com
2019-11-07 07:02:40 +01:00

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# SPDX-License-Identifier: GPL-2.0-only
#
# Generic thermal sysfs drivers configuration
#
menuconfig THERMAL
bool "Generic Thermal sysfs driver"
help
Generic Thermal Sysfs driver offers a generic mechanism for
thermal management. Usually it's made up of one or more thermal
zone and cooling device.
Each thermal zone contains its own temperature, trip points,
cooling devices.
All platforms with ACPI thermal support can use this driver.
If you want this support, you should say Y here.
if THERMAL
config THERMAL_STATISTICS
bool "Thermal state transition statistics"
help
Export thermal state transition statistics information through sysfs.
If in doubt, say N.
config THERMAL_EMERGENCY_POWEROFF_DELAY_MS
int "Emergency poweroff delay in milli-seconds"
default 0
help
Thermal subsystem will issue a graceful shutdown when
critical temperatures are reached using orderly_poweroff(). In
case of failure of an orderly_poweroff(), the thermal emergency
poweroff kicks in after a delay has elapsed and shuts down the system.
This config is number of milliseconds to delay before emergency
poweroff kicks in. Similarly to the critical trip point,
the delay should be carefully profiled so as to give adequate
time for orderly_poweroff() to finish on regular execution.
If set to 0 emergency poweroff will not be supported.
In doubt, leave as 0.
config THERMAL_HWMON
bool
prompt "Expose thermal sensors as hwmon device"
depends on HWMON=y || HWMON=THERMAL
default y
help
In case a sensor is registered with the thermal
framework, this option will also register it
as a hwmon. The sensor will then have the common
hwmon sysfs interface.
Say 'Y' here if you want all thermal sensors to
have hwmon sysfs interface too.
config THERMAL_OF
bool
prompt "APIs to parse thermal data out of device tree"
depends on OF
default y
help
This options provides helpers to add the support to
read and parse thermal data definitions out of the
device tree blob.
Say 'Y' here if you need to build thermal infrastructure
based on device tree.
config THERMAL_WRITABLE_TRIPS
bool "Enable writable trip points"
help
This option allows the system integrator to choose whether
trip temperatures can be changed from userspace. The
writable trips need to be specified when setting up the
thermal zone but the choice here takes precedence.
Say 'Y' here if you would like to allow userspace tools to
change trip temperatures.
choice
prompt "Default Thermal governor"
default THERMAL_DEFAULT_GOV_STEP_WISE
help
This option sets which thermal governor shall be loaded at
startup. If in doubt, select 'step_wise'.
config THERMAL_DEFAULT_GOV_STEP_WISE
bool "step_wise"
select THERMAL_GOV_STEP_WISE
help
Use the step_wise governor as default. This throttles the
devices one step at a time.
config THERMAL_DEFAULT_GOV_FAIR_SHARE
bool "fair_share"
select THERMAL_GOV_FAIR_SHARE
help
Use the fair_share governor as default. This throttles the
devices based on their 'contribution' to a zone. The
contribution should be provided through platform data.
config THERMAL_DEFAULT_GOV_USER_SPACE
bool "user_space"
select THERMAL_GOV_USER_SPACE
help
Select this if you want to let the user space manage the
platform thermals.
config THERMAL_DEFAULT_GOV_POWER_ALLOCATOR
bool "power_allocator"
select THERMAL_GOV_POWER_ALLOCATOR
help
Select this if you want to control temperature based on
system and device power allocation. This governor can only
operate on cooling devices that implement the power API.
endchoice
config THERMAL_GOV_FAIR_SHARE
bool "Fair-share thermal governor"
help
Enable this to manage platform thermals using fair-share governor.
config THERMAL_GOV_STEP_WISE
bool "Step_wise thermal governor"
help
Enable this to manage platform thermals using a simple linear
governor.
config THERMAL_GOV_BANG_BANG
bool "Bang Bang thermal governor"
default n
help
Enable this to manage platform thermals using bang bang governor.
Say 'Y' here if you want to use two point temperature regulation
used for fans without throttling. Some fan drivers depend on this
governor to be enabled (e.g. acerhdf).
config THERMAL_GOV_USER_SPACE
bool "User_space thermal governor"
help
Enable this to let the user space manage the platform thermals.
config THERMAL_GOV_POWER_ALLOCATOR
bool "Power allocator thermal governor"
depends on ENERGY_MODEL
help
Enable this to manage platform thermals by dynamically
allocating and limiting power to devices.
config CPU_THERMAL
bool "Generic cpu cooling support"
depends on CPU_FREQ
depends on THERMAL_OF
help
This implements the generic cpu cooling mechanism through frequency
reduction. An ACPI version of this already exists
(drivers/acpi/processor_thermal.c).
This will be useful for platforms using the generic thermal interface
and not the ACPI interface.
If you want this support, you should say Y here.
config CLOCK_THERMAL
bool "Generic clock cooling support"
depends on COMMON_CLK
depends on PM_OPP
help
This entry implements the generic clock cooling mechanism through
frequency clipping. Typically used to cool off co-processors. The
device that is configured to use this cooling mechanism will be
controlled to reduce clock frequency whenever temperature is high.
config DEVFREQ_THERMAL
bool "Generic device cooling support"
depends on PM_DEVFREQ
depends on PM_OPP
help
This implements the generic devfreq cooling mechanism through
frequency reduction for devices using devfreq.
This will throttle the device by limiting the maximum allowed DVFS
frequency corresponding to the cooling level.
In order to use the power extensions of the cooling device,
devfreq should use the simple_ondemand governor.
If you want this support, you should say Y here.
config THERMAL_EMULATION
bool "Thermal emulation mode support"
help
Enable this option to make a emul_temp sysfs node in thermal zone
directory to support temperature emulation. With emulation sysfs node,
user can manually input temperature and test the different trip
threshold behaviour for simulation purpose.
WARNING: Be careful while enabling this option on production systems,
because userland can easily disable the thermal policy by simply
flooding this sysfs node with low temperature values.
config THERMAL_MMIO
tristate "Generic Thermal MMIO driver"
depends on OF || COMPILE_TEST
depends on HAS_IOMEM
help
This option enables the generic thermal MMIO driver that will use
memory-mapped reads to get the temperature. Any HW/System that
allows temperature reading by a single memory-mapped reading, be it
register or shared memory, is a potential candidate to work with this
driver.
config HISI_THERMAL
tristate "Hisilicon thermal driver"
depends on ARCH_HISI || COMPILE_TEST
depends on HAS_IOMEM
depends on OF
default y
help
Enable this to plug hisilicon's thermal sensor driver into the Linux
thermal framework. cpufreq is used as the cooling device to throttle
CPUs when the passive trip is crossed.
config IMX_THERMAL
tristate "Temperature sensor driver for Freescale i.MX SoCs"
depends on ARCH_MXC || COMPILE_TEST
depends on NVMEM || !NVMEM
depends on MFD_SYSCON
depends on OF
help
Support for Temperature Monitor (TEMPMON) found on Freescale i.MX SoCs.
It supports one critical trip point and one passive trip point. The
cpufreq is used as the cooling device to throttle CPUs when the
passive trip is crossed.
config MAX77620_THERMAL
tristate "Temperature sensor driver for Maxim MAX77620 PMIC"
depends on MFD_MAX77620
depends on OF
help
Support for die junction temperature warning alarm for Maxim
Semiconductor PMIC MAX77620 device. Device generates two alarm
interrupts when PMIC die temperature cross the threshold of
120 degC and 140 degC.
config QORIQ_THERMAL
tristate "QorIQ Thermal Monitoring Unit"
depends on THERMAL_OF
depends on HAS_IOMEM
help
Support for Thermal Monitoring Unit (TMU) found on QorIQ platforms.
It supports one critical trip point and one passive trip point. The
cpufreq is used as the cooling device to throttle CPUs when the
passive trip is crossed.
config SPEAR_THERMAL
tristate "SPEAr thermal sensor driver"
depends on PLAT_SPEAR || COMPILE_TEST
depends on HAS_IOMEM
depends on OF
help
Enable this to plug the SPEAr thermal sensor driver into the Linux
thermal framework.
config ROCKCHIP_THERMAL
tristate "Rockchip thermal driver"
depends on ARCH_ROCKCHIP || COMPILE_TEST
depends on RESET_CONTROLLER
depends on HAS_IOMEM
help
Rockchip thermal driver provides support for Temperature sensor
ADC (TS-ADC) found on Rockchip SoCs. It supports one critical
trip point. Cpufreq is used as the cooling device and will throttle
CPUs when the Temperature crosses the passive trip point.
config RCAR_THERMAL
tristate "Renesas R-Car thermal driver"
depends on ARCH_RENESAS || COMPILE_TEST
depends on HAS_IOMEM
help
Enable this to plug the R-Car thermal sensor driver into the Linux
thermal framework.
config RCAR_GEN3_THERMAL
tristate "Renesas R-Car Gen3 thermal driver"
depends on ARCH_RENESAS || COMPILE_TEST
depends on HAS_IOMEM
depends on OF
help
Enable this to plug the R-Car Gen3 thermal sensor driver into the Linux
thermal framework.
config KIRKWOOD_THERMAL
tristate "Temperature sensor on Marvell Kirkwood SoCs"
depends on MACH_KIRKWOOD || COMPILE_TEST
depends on HAS_IOMEM
depends on OF
help
Support for the Kirkwood thermal sensor driver into the Linux thermal
framework. Only kirkwood 88F6282 and 88F6283 have this sensor.
config DOVE_THERMAL
tristate "Temperature sensor on Marvell Dove SoCs"
depends on ARCH_DOVE || MACH_DOVE || COMPILE_TEST
depends on HAS_IOMEM
depends on OF
help
Support for the Dove thermal sensor driver in the Linux thermal
framework.
config DB8500_THERMAL
tristate "DB8500 thermal management"
depends on MFD_DB8500_PRCMU && OF
default y
help
Adds DB8500 thermal management implementation according to the thermal
management framework. A thermal zone with several trip points will be
created. Cooling devices can be bound to the trip points to cool this
thermal zone if trip points reached.
config ARMADA_THERMAL
tristate "Marvell EBU Armada SoCs thermal management"
depends on ARCH_MVEBU || COMPILE_TEST
depends on HAS_IOMEM
depends on OF
help
Enable this option if you want to have support for thermal management
controller present in Marvell EBU Armada SoCs (370,375,XP,38x,7K,8K).
config DA9062_THERMAL
tristate "DA9062/DA9061 Dialog Semiconductor thermal driver"
depends on MFD_DA9062 || COMPILE_TEST
depends on OF
help
Enable this for the Dialog Semiconductor thermal sensor driver.
This will report PMIC junction over-temperature for one thermal trip
zone.
Compatible with the DA9062 and DA9061 PMICs.
config MTK_THERMAL
tristate "Temperature sensor driver for mediatek SoCs"
depends on ARCH_MEDIATEK || COMPILE_TEST
depends on HAS_IOMEM
depends on NVMEM || NVMEM=n
depends on RESET_CONTROLLER
default y
help
Enable this option if you want to have support for thermal management
controller present in Mediatek SoCs
config AMLOGIC_THERMAL
tristate "Amlogic Thermal Support"
default ARCH_MESON
depends on OF && ARCH_MESON
help
If you say yes here you get support for Amlogic Thermal
for G12 SoC Family.
This driver can also be built as a module. If so, the module will
be called amlogic_thermal.
menu "Intel thermal drivers"
depends on X86 || X86_INTEL_QUARK || COMPILE_TEST
source "drivers/thermal/intel/Kconfig"
endmenu
menu "Broadcom thermal drivers"
depends on ARCH_BCM || ARCH_BRCMSTB || ARCH_BCM2835 || ARCH_BCM_IPROC || \
COMPILE_TEST
source "drivers/thermal/broadcom/Kconfig"
endmenu
menu "Texas Instruments thermal drivers"
depends on ARCH_HAS_BANDGAP || COMPILE_TEST
depends on HAS_IOMEM
source "drivers/thermal/ti-soc-thermal/Kconfig"
endmenu
menu "Samsung thermal drivers"
depends on ARCH_EXYNOS || COMPILE_TEST
source "drivers/thermal/samsung/Kconfig"
endmenu
menu "STMicroelectronics thermal drivers"
depends on (ARCH_STI || ARCH_STM32) && OF
source "drivers/thermal/st/Kconfig"
endmenu
config TANGO_THERMAL
tristate "Tango thermal management"
depends on ARCH_TANGO || COMPILE_TEST
help
Enable the Tango thermal driver, which supports the primitive
temperature sensor embedded in Tango chips since the SMP8758.
This sensor only generates a 1-bit signal to indicate whether
the die temperature exceeds a programmable threshold.
source "drivers/thermal/tegra/Kconfig"
config GENERIC_ADC_THERMAL
tristate "Generic ADC based thermal sensor"
depends on IIO
help
This enabled a thermal sysfs driver for the temperature sensor
which is connected to the General Purpose ADC. The ADC channel
is read via IIO framework and the channel information is provided
to this driver. This driver reports the temperature by reading ADC
channel and converts it to temperature based on lookup table.
menu "Qualcomm thermal drivers"
depends on (ARCH_QCOM && OF) || COMPILE_TEST
source "drivers/thermal/qcom/Kconfig"
endmenu
config ZX2967_THERMAL
tristate "Thermal sensors on zx2967 SoC"
depends on ARCH_ZX || COMPILE_TEST
help
Enable the zx2967 thermal sensors driver, which supports
the primitive temperature sensor embedded in zx2967 SoCs.
This sensor generates the real time die temperature.
config UNIPHIER_THERMAL
tristate "Socionext UniPhier thermal driver"
depends on ARCH_UNIPHIER || COMPILE_TEST
depends on THERMAL_OF && MFD_SYSCON
help
Enable this to plug in UniPhier on-chip PVT thermal driver into the
thermal framework. The driver supports CPU thermal zone temperature
reporting and a couple of trip points.
endif
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