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linux/drivers/thermal/Kconfig
Rafael J. Wysocki f6a034f2df thermal: Introduce a debugfs-based testing facility 
Introduce a facility allowing the thermal core functionality to be
exercised in a controlled way in order to verify its behavior, without
affecting its regular users noticeably.

It is based on the idea of preparing thermal zone templates along with
their trip points by writing to files in debugfs.  When ready, those
templates can be used for registering test thermal zones with the
thermal core.

The temperature of a test thermal zone created this way can be adjusted
via debugfs, which also triggers a __thermal_zone_device_update() call
for it.  By manipulating the temperature of a test thermal zone, one can
check if the thermal core reacts to the changes of it as expected.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://patch.msgid.link/6065927.lOV4Wx5bFT@rjwysocki.net
[ rjw: Fixed ordering of kcalloc() arguments ]
[ rjw: Fixed debugfs_create_dir() return value checks ]
[ rjw: Fixed two kerneldoc comments ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2024-08-22 17:42:57 +02:00

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# SPDX-License-Identifier: GPL-2.0-only
#
# Generic thermal drivers configuration
#
menuconfig THERMAL
bool "Thermal drivers"
help
Thermal drivers offer a generic mechanism for
thermal management. Usually it's made up of one or more thermal
zones and cooling devices.
Each thermal zone contains its own temperature, trip points,
and cooling devices.
All platforms with ACPI or Open Firmware thermal support can use
this driver.
If you want this support, you should say Y here.
if THERMAL
config THERMAL_NETLINK
bool "Thermal netlink management"
depends on NET
help
The thermal framework has a netlink interface to do thermal
zones discovery, temperature readings and events such as
trip point crossed, cooling device update or governor
change. It is recommended to enable the feature.
config THERMAL_STATISTICS
bool "Thermal state transition statistics"
help
Export thermal state transition statistics information through sysfs.
If in doubt, say N.
config THERMAL_DEBUGFS
bool "Thermal subsystem debug support"
depends on DEBUG_FS
help
Say Y to allow the thermal subsystem to collect diagnostic
information that can be accessed via debugfs.
config THERMAL_CORE_TESTING
tristate "Thermal core testing facility"
depends on DEBUG_FS
help
Say Y to add a debugfs-based thermal core testing facility.
It allows test thermal zones to be created and populated
with trip points in order to exercise the thermal core
functionality in a controlled way.
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.
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
The Userspace governor allows to get trip point crossed
notification from the kernel via uevents. It is recommended
to use the netlink interface instead which gives richer
information about the thermal framework events.
config THERMAL_DEFAULT_GOV_POWER_ALLOCATOR
bool "power_allocator"
depends on 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.
config THERMAL_DEFAULT_GOV_BANG_BANG
bool "bang_bang"
depends on THERMAL_GOV_BANG_BANG
help
Use the bang_bang governor as default. This throttles the
devices one step at the time, taking into account the trip
point hysteresis.
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 THERMAL_OF
help
Enable the CPU cooling features. If the system has no active
cooling device available, this option allows to use the CPU
as a cooling device.
if CPU_THERMAL
config CPU_FREQ_THERMAL
bool "CPU frequency cooling device"
depends on CPU_FREQ
default y
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.
config CPU_IDLE_THERMAL
bool "CPU idle cooling device"
depends on IDLE_INJECT
help
This implements the CPU cooling mechanism through
idle injection. This will throttle the CPU by injecting
idle cycle.
endif
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
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 IMX_SC_THERMAL
tristate "Temperature sensor driver for NXP i.MX SoCs with System Controller"
depends on IMX_SCU
depends on OF
help
Support for Temperature Monitor (TEMPMON) found on NXP i.MX SoCs with
system controller inside, Linux kernel has to communicate with system
controller via MU (message unit) IPC to get temperature from thermal
sensor. It supports one critical trip point and one
passive trip point for each thermal sensor.
config IMX8MM_THERMAL
tristate "Temperature sensor driver for Freescale i.MX8MM SoC"
depends on ARCH_MXC || COMPILE_TEST
depends on OF
help
Support for Thermal Monitoring Unit (TMU) found on Freescale i.MX8MM SoC.
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 K3_THERMAL
tristate "Texas Instruments K3 thermal support"
depends on ARCH_K3 || COMPILE_TEST
help
If you say yes here you get thermal support for the Texas Instruments
K3 SoC family. The current chip supported is:
- AM654
This includes temperature reading functionality.
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 && HAS_IOMEM
depends on PPC_E500MC || SOC_LS1021A || ARCH_LAYERSCAPE || (ARCH_MXC && ARM64) || COMPILE_TEST
select REGMAP_MMIO
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 SUN8I_THERMAL
tristate "Allwinner sun8i thermal driver"
depends on ARCH_SUNXI || COMPILE_TEST
depends on HAS_IOMEM
depends on NVMEM
depends on OF
depends on RESET_CONTROLLER
help
Support for the sun8i thermal sensor driver into the Linux thermal
framework.
To compile this driver as a module, choose M here: the
module will be called sun8i-thermal.
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 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.
menu "Mediatek thermal drivers"
depends on ARCH_MEDIATEK || COMPILE_TEST
source "drivers/thermal/mediatek/Kconfig"
endmenu
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
source "drivers/thermal/renesas/Kconfig"
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 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.
config SPRD_THERMAL
tristate "Temperature sensor on Spreadtrum SoCs"
depends on ARCH_SPRD || COMPILE_TEST
help
Support for the Spreadtrum thermal sensor driver in the Linux thermal
framework.
config KHADAS_MCU_FAN_THERMAL
tristate "Khadas MCU controller FAN cooling support"
depends on OF
depends on MFD_KHADAS_MCU
select MFD_CORE
select REGMAP
help
If you say yes here you get support for the FAN controlled
by the Microcontroller found on the Khadas VIM boards.
config LOONGSON2_THERMAL
tristate "Loongson-2 SoC series thermal driver"
depends on LOONGARCH || COMPILE_TEST
depends on OF
help
Support for Thermal driver found on Loongson-2 SoC series platforms.
The thermal driver realizes get_temp and set_trips function, which
are used to obtain the temperature of the current node and set the
temperature range to trigger the interrupt. When the input temperature
is higher than the high temperature threshold or lower than the low
temperature threshold, the interrupt will occur.
endif
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