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In the Intel SoCs like Bay Trail, there are 2 additional digital temperature sensors(DTS), in addition to the standard DTSs in the core. Also they support 4 programmable thresholds, out of which two can be used by OSPM. These thresholds can be used by OSPM thermal control. Out of these two thresholds, one is used by driver and one user mode can change via thermal sysfs to get notifications on threshold violations. The driver defines one critical trip points, which is set to TJ MAX - offset. The offset can be changed via module parameter (default 5C). Also it uses one of the thresholds to get notification for this temperature violation. This is very important for orderly shutdown as the many of these devices don't have ACPI thermal zone, and expects that there is some other thermal control mechanism present in OSPM. When a Linux distro is used without additional specialized thermal control program, BIOS can do force shutdown when thermals are not under control. When temperature reaches critical, the Linux thermal core will initiate an orderly shutdown. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Zhang Rui <rui.zhang@intel.com>
247 lines
7.8 KiB
Plaintext
247 lines
7.8 KiB
Plaintext
#
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# Generic thermal sysfs drivers configuration
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#
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menuconfig THERMAL
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tristate "Generic Thermal sysfs driver"
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help
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Generic Thermal Sysfs driver offers a generic mechanism for
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thermal management. Usually it's made up of one or more thermal
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zone and cooling device.
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Each thermal zone contains its own temperature, trip points,
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cooling devices.
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All platforms with ACPI thermal support can use this driver.
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If you want this support, you should say Y or M here.
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if THERMAL
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config THERMAL_HWMON
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bool
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prompt "Expose thermal sensors as hwmon device"
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depends on HWMON=y || HWMON=THERMAL
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default y
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help
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In case a sensor is registered with the thermal
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framework, this option will also register it
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as a hwmon. The sensor will then have the common
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hwmon sysfs interface.
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Say 'Y' here if you want all thermal sensors to
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have hwmon sysfs interface too.
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config THERMAL_OF
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bool
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prompt "APIs to parse thermal data out of device tree"
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depends on OF
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default y
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help
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This options provides helpers to add the support to
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read and parse thermal data definitions out of the
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device tree blob.
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Say 'Y' here if you need to build thermal infrastructure
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based on device tree.
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choice
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prompt "Default Thermal governor"
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default THERMAL_DEFAULT_GOV_STEP_WISE
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help
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This option sets which thermal governor shall be loaded at
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startup. If in doubt, select 'step_wise'.
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config THERMAL_DEFAULT_GOV_STEP_WISE
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bool "step_wise"
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select THERMAL_GOV_STEP_WISE
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help
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Use the step_wise governor as default. This throttles the
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devices one step at a time.
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config THERMAL_DEFAULT_GOV_FAIR_SHARE
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bool "fair_share"
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select THERMAL_GOV_FAIR_SHARE
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help
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Use the fair_share governor as default. This throttles the
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devices based on their 'contribution' to a zone. The
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contribution should be provided through platform data.
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config THERMAL_DEFAULT_GOV_USER_SPACE
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bool "user_space"
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select THERMAL_GOV_USER_SPACE
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help
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Select this if you want to let the user space manage the
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platform thermals.
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endchoice
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config THERMAL_GOV_FAIR_SHARE
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bool "Fair-share thermal governor"
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help
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Enable this to manage platform thermals using fair-share governor.
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config THERMAL_GOV_STEP_WISE
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bool "Step_wise thermal governor"
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help
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Enable this to manage platform thermals using a simple linear
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governor.
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config THERMAL_GOV_USER_SPACE
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bool "User_space thermal governor"
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help
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Enable this to let the user space manage the platform thermals.
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config CPU_THERMAL
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bool "generic cpu cooling support"
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depends on CPU_FREQ
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depends on THERMAL_OF
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help
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This implements the generic cpu cooling mechanism through frequency
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reduction. An ACPI version of this already exists
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(drivers/acpi/processor_thermal.c).
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This will be useful for platforms using the generic thermal interface
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and not the ACPI interface.
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If you want this support, you should say Y here.
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config THERMAL_EMULATION
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bool "Thermal emulation mode support"
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help
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Enable this option to make a emul_temp sysfs node in thermal zone
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directory to support temperature emulation. With emulation sysfs node,
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user can manually input temperature and test the different trip
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threshold behaviour for simulation purpose.
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WARNING: Be careful while enabling this option on production systems,
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because userland can easily disable the thermal policy by simply
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flooding this sysfs node with low temperature values.
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config IMX_THERMAL
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tristate "Temperature sensor driver for Freescale i.MX SoCs"
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depends on CPU_THERMAL
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depends on MFD_SYSCON
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depends on OF
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help
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Support for Temperature Monitor (TEMPMON) found on Freescale i.MX SoCs.
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It supports one critical trip point and one passive trip point. The
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cpufreq is used as the cooling device to throttle CPUs when the
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passive trip is crossed.
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config SPEAR_THERMAL
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bool "SPEAr thermal sensor driver"
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depends on PLAT_SPEAR
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depends on OF
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help
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Enable this to plug the SPEAr thermal sensor driver into the Linux
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thermal framework.
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config RCAR_THERMAL
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tristate "Renesas R-Car thermal driver"
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depends on ARCH_SHMOBILE || COMPILE_TEST
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depends on HAS_IOMEM
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help
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Enable this to plug the R-Car thermal sensor driver into the Linux
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thermal framework.
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config KIRKWOOD_THERMAL
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tristate "Temperature sensor on Marvell Kirkwood SoCs"
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depends on ARCH_KIRKWOOD || MACH_KIRKWOOD
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depends on OF
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help
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Support for the Kirkwood thermal sensor driver into the Linux thermal
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framework. Only kirkwood 88F6282 and 88F6283 have this sensor.
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config DOVE_THERMAL
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tristate "Temperature sensor on Marvell Dove SoCs"
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depends on ARCH_DOVE
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depends on OF
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help
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Support for the Dove thermal sensor driver in the Linux thermal
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framework.
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config DB8500_THERMAL
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bool "DB8500 thermal management"
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depends on ARCH_U8500
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default y
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help
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Adds DB8500 thermal management implementation according to the thermal
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management framework. A thermal zone with several trip points will be
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created. Cooling devices can be bound to the trip points to cool this
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thermal zone if trip points reached.
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config ARMADA_THERMAL
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tristate "Armada 370/XP thermal management"
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depends on ARCH_MVEBU
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depends on OF
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help
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Enable this option if you want to have support for thermal management
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controller present in Armada 370 and Armada XP SoC.
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config DB8500_CPUFREQ_COOLING
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tristate "DB8500 cpufreq cooling"
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depends on ARCH_U8500
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depends on CPU_THERMAL
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default y
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help
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Adds DB8500 cpufreq cooling devices, and these cooling devices can be
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bound to thermal zone trip points. When a trip point reached, the
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bound cpufreq cooling device turns active to set CPU frequency low to
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cool down the CPU.
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config INTEL_POWERCLAMP
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tristate "Intel PowerClamp idle injection driver"
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depends on THERMAL
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depends on X86
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depends on CPU_SUP_INTEL
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help
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Enable this to enable Intel PowerClamp idle injection driver. This
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enforce idle time which results in more package C-state residency. The
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user interface is exposed via generic thermal framework.
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config X86_PKG_TEMP_THERMAL
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tristate "X86 package temperature thermal driver"
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depends on X86_THERMAL_VECTOR
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select THERMAL_GOV_USER_SPACE
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default m
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help
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Enable this to register CPU digital sensor for package temperature as
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thermal zone. Each package will have its own thermal zone. There are
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two trip points which can be set by user to get notifications via thermal
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notification methods.
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config ACPI_INT3403_THERMAL
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tristate "ACPI INT3403 thermal driver"
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depends on X86 && ACPI
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help
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Newer laptops and tablets that use ACPI may have thermal sensors
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outside the core CPU/SOC for thermal safety reasons. These
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temperature sensors are also exposed for the OS to use via the so
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called INT3403 ACPI object. This driver will, on devices that have
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such sensors, expose the temperature information from these sensors
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to userspace via the normal thermal framework. This means that a wide
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range of applications and GUI widgets can show this information to
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the user or use this information for making decisions. For example,
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the Intel Thermal Daemon can use this information to allow the user
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to select his laptop to run without turning on the fans.
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config INTEL_SOC_DTS_THERMAL
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tristate "Intel SoCs DTS thermal driver"
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depends on X86 && IOSF_MBI
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help
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Enable this to register Intel SoCs (e.g. Bay Trail) platform digital
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temperature sensor (DTS). These SoCs have two additional DTSs in
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addition to DTSs on CPU cores. Each DTS will be registered as a
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thermal zone. There are two trip points. One of the trip point can
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be set by user mode programs to get notifications via Linux thermal
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notification methods.The other trip is a critical trip point, which
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was set by the driver based on the TJ MAX temperature.
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menu "Texas Instruments thermal drivers"
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source "drivers/thermal/ti-soc-thermal/Kconfig"
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endmenu
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menu "Samsung thermal drivers"
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depends on PLAT_SAMSUNG
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source "drivers/thermal/samsung/Kconfig"
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endmenu
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endif
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