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/openbmc/linux/Documentation/devicetree/bindings/thermal/
H A Dbrcm,sr-thermal.txt1 * Broadcom Stingray Thermal
3 This binding describes thermal sensors that is part of Stingray SoCs.
6 - compatible : Must be "brcm,sr-thermal"
7 - reg : Memory where tmon data will be available.
8 - brcm,tmon-mask: A one cell bit mask of valid TMON sources.
10 - #thermal-sensor-cells : Thermal sensor phandler
11 - polling-delay: Max number of milliseconds to wait between polls.
12 - thermal-sensors: A list of thermal sensor phandles and specifier.
14 in correspond with brcm,tmon-mask.
15 - temperature: trip temperature threshold in millicelsius.
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H A Dnvidia,tegra124-soctherm.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/thermal/nvidia,tegra124-soctherm.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: NVIDIA Tegra124 SOCTHERM Thermal Management System
10 - Thierry Reding <thierry.reding@gmail.com>
11 - Jon Hunter <jonathanh@nvidia.com>
13 description: The SOCTHERM IP block contains thermal sensors, support for
14 polled or interrupt-based thermal monitoring, CPU and GPU throttling based
21 - nvidia,tegra124-soctherm
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H A Dthermal-idle.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/thermal/thermal-idle.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Thermal idle cooling device
11 - Daniel Lezcano <daniel.lezcano@linaro.org>
14 The thermal idle cooling device allows the system to passively
18 This binding describes the thermal idle node.
22 const: thermal-idle
24 A thermal-idle node describes the idle cooling device properties to
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H A Dst,stm32-thermal.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/thermal/st,stm32-thermal.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: STMicroelectronics STM32 digital thermal sensor (DTS)
10 - Pascal Paillet <p.paillet@foss.st.com>
14 const: st,stm32-thermal
25 clock-names:
27 - const: pclk
29 "#thermal-sensor-cells":
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H A Dthermal-cooling-devices.yaml1 # SPDX-License-Identifier: (GPL-2.0)
4 ---
5 $id: http://devicetree.org/schemas/thermal/thermal-cooling-devices.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Thermal cooling device
11 - Amit Kucheria <amitk@kernel.org>
14 Thermal management is achieved in devicetree by describing the sensor hardware
15 and the software abstraction of cooling devices and thermal zones required to
16 take appropriate action to mitigate thermal overload.
18 The following node types are used to completely describe a thermal management
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H A Dbrcm,ns-thermal.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/thermal/brcm,ns-thermal.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Broadcom Northstar Thermal
10 - Rafał Miłecki <rafal@milecki.pl>
13 Thermal sensor that is part of Northstar's DMU (Device Management Unit).
16 - $ref: thermal-sensor.yaml#
20 const: brcm,ns-thermal
26 "#thermal-sensor-cells":
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H A Damlogic,thermal.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/thermal/amlogic,thermal.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Amlogic Thermal
10 - Guillaume La Roque <glaroque@baylibre.com>
12 description: Binding for Amlogic Thermal
17 - enum:
18 - amlogic,g12a-cpu-thermal
19 - amlogic,g12a-ddr-thermal
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H A Drcar-thermal.yaml1 # SPDX-License-Identifier: GPL-2.0-only
4 ---
5 $id: http://devicetree.org/schemas/thermal/rcar-thermal.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Renesas R-Car Thermal
11 - Niklas Söderlund <niklas.soderlund@ragnatech.se>
16 - items:
17 - enum:
18 - renesas,thermal-r8a73a4 # R-Mobile APE6
19 - renesas,thermal-r8a7779 # R-Car H1
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/openbmc/linux/drivers/thermal/
H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
3 # Generic thermal drivers configuration
6 menuconfig THERMAL config
7 bool "Thermal drivers"
9 Thermal drivers offer a generic mechanism for
10 thermal management. Usually it's made up of one or more thermal
12 Each thermal zone contains its own temperature, trip points,
14 All platforms with ACPI or Open Firmware thermal support can use
18 if THERMAL
21 bool "Thermal netlink management"
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H A Dcpuidle_cooling.c1 // SPDX-License-Identifier: GPL-2.0
10 #include <linux/cpu.h>
18 #include <linux/thermal.h>
21 * struct cpuidle_cooling_device - data for the idle cooling device
31 * cpuidle_cooling_runtime - Running time computation
32 * @idle_duration_us: CPU idle time to inject in microseconds
43 * running = idle x ((100 / ratio) - 1)
47 * running = (idle x 100) / ratio - idle
60 return ((idle_duration_us * 100) / state) - idle_duration_us; in cpuidle_cooling_runtime()
64 * cpuidle_cooling_get_max_state - Get the maximum state
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/openbmc/linux/drivers/thermal/intel/
H A Dtherm_throt.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * Thermal throttle event support code (such as syslog messaging and rate
6 * This allows consistent reporting of CPU thermal throttle events.
8 * Maintains a counter in /sys that keeps track of the number of thermal
9 * events, such that the user knows how bad the thermal problem might be
26 #include <linux/cpu.h>
29 #include <asm/thermal.h>
38 /* How long to wait between reporting thermal events */
45 * struct _thermal_state - Represent the current thermal event state
51 * @count: Stores the current running count for thermal
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H A Dintel_tcc.c1 // SPDX-License-Identifier: GPL-2.0-only
3 * intel_tcc.c - Library for Intel TCC (thermal control circuitry) MSR access
12 * intel_tcc_get_tjmax() - returns the default TCC activation Temperature
13 * @cpu: cpu that the MSR should be run on, nagative value means any cpu.
15 * Get the TjMax value, which is the default thermal throttling or TCC
20 int intel_tcc_get_tjmax(int cpu) in intel_tcc_get_tjmax() argument
25 if (cpu < 0) in intel_tcc_get_tjmax()
28 err = rdmsr_safe_on_cpu(cpu, MSR_IA32_TEMPERATURE_TARGET, &low, &high); in intel_tcc_get_tjmax()
34 return val ? val : -ENODATA; in intel_tcc_get_tjmax()
39 * intel_tcc_get_offset() - returns the TCC Offset value to Tjmax
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H A DKconfig1 # SPDX-License-Identifier: GPL-2.0-only
11 enforce idle time which results in more package C-state residency. The
12 user interface is exposed via generic thermal framework.
23 tristate "X86 package temperature thermal driver"
30 Enable this to register CPU digital sensor for package temperature as
31 thermal zone. Each package will have its own thermal zone. There are
32 two trip points which can be set by user to get notifications via thermal
47 tristate "Intel SoCs DTS thermal driver"
54 addition to DTSs on CPU cores. Each DTS will be registered as a
55 thermal zone. There are two trip points. One of the trip point can
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/openbmc/linux/arch/arm64/boot/dts/freescale/
H A Dimx8qm.dtsi1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright 2018-2019 NXP
7 #include <dt-bindings/clock/imx8-lpcg.h>
8 #include <dt-bindings/firmware/imx/rsrc.h>
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/interrupt-controller/arm-gic.h>
11 #include <dt-bindings/pinctrl/pads-imx8qm.h>
12 #include <dt-bindings/thermal/thermal.h>
15 interrupt-parent = <&gic>;
16 #address-cells = <2>;
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/openbmc/linux/arch/arm/boot/dts/samsung/
H A Dexynos5422-odroidhc1.dts1 // SPDX-License-Identifier: GPL-2.0
10 /dts-v1/;
11 #include <dt-bindings/leds/common.h>
12 #include "exynos5422-odroid-core.dtsi"
16 compatible = "hardkernel,odroid-hc1", "samsung,exynos5800", \
19 led-controller {
20 compatible = "pwm-leds";
22 led-1 {
26 pwm-names = "pwm2";
27 max-brightness = <255>;
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H A Dexynos4-cpu-thermal.dtsi1 // SPDX-License-Identifier: GPL-2.0
3 * Device tree sources for Exynos4 thermal zone
8 #include <dt-bindings/thermal/thermal.h>
11 thermal-zones {
12 cpu_thermal: cpu-thermal {
13 thermal-sensors = <&tmu>;
14 polling-delay-passive = <0>;
15 polling-delay = <0>;
17 cpu_alert0: cpu-alert-0 {
22 cpu_alert1: cpu-alert-1 {
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H A Dexynos5422-odroidxu3-common.dtsi1 // SPDX-License-Identifier: GPL-2.0
3 * Hardkernel Odroid XU3/XU3-Lite/XU4 boards common device tree source
12 #include <dt-bindings/input/input.h>
13 #include "exynos5422-odroid-core.dtsi"
20 gpio-keys {
21 compatible = "gpio-keys";
22 pinctrl-names = "default";
23 pinctrl-0 = <&power_key>;
25 power-key {
36 debounce-interval = <0>;
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/openbmc/linux/Documentation/hwmon/
H A Dpeci-cputemp.rst1 .. SPDX-License-Identifier: GPL-2.0-only
3 Kernel driver peci-cputemp
9 Intel Xeon E5-14xx v3 family
10 Intel Xeon E5-24xx v3 family
11 Intel Xeon E5-16xx v3 family
12 Intel Xeon E5-26xx v3 family
13 Intel Xeon E5-46xx v3 family
14 Intel Xeon E7-48xx v3 family
15 Intel Xeon E7-88xx v3 family
17 Intel Xeon E5-16xx v4 family
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/openbmc/linux/Documentation/devicetree/bindings/arm/marvell/
H A Dap80x-system-controller.txt6 registers giving access to numerous features: clocks, pin-muxing and
11 - compatible: must be: "syscon", "simple-mfd";
12 - reg: register area of the AP80x system controller
18 -------
24 - 0: reference clock of CPU cluster 0
25 - 1: reference clock of CPU cluster 1
26 - 2: fixed PLL at 1200 Mhz
27 - 3: MSS clock, derived from the fixed PLL
31 - compatible: must be one of:
32 * "marvell,ap806-clock"
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/openbmc/linux/arch/arm64/boot/dts/qcom/
H A Dipq9574.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR BSD-3-Clause)
5 * Copyright (c) 2020-2021 The Linux Foundation. All rights reserved.
9 #include <dt-bindings/clock/qcom,apss-ipq.h>
10 #include <dt-bindings/clock/qcom,ipq9574-gcc.h>
11 #include <dt-bindings/interrupt-controller/arm-gic.h>
12 #include <dt-bindings/reset/qcom,ipq9574-gcc.h>
13 #include <dt-bindings/thermal/thermal.h>
16 interrupt-parent = <&intc>;
17 #address-cells = <2>;
18 #size-cells = <2>;
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H A Dsm6375.dtsi1 // SPDX-License-Identifier: BSD-3-Clause
6 #include <dt-bindings/clock/qcom,rpmcc.h>
7 #include <dt-bindings/clock/qcom,sm6375-gcc.h>
8 #include <dt-bindings/clock/qcom,sm6375-gpucc.h>
9 #include <dt-bindings/dma/qcom-gpi.h>
10 #include <dt-bindings/firmware/qcom,scm.h>
11 #include <dt-bindings/interconnect/qcom,osm-l3.h>
12 #include <dt-bindings/interrupt-controller/arm-gic.h>
13 #include <dt-bindings/mailbox/qcom-ipcc.h>
14 #include <dt-bindings/power/qcom-rpmpd.h>
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/openbmc/linux/arch/powerpc/kernel/
H A Dtau_6xx.c1 // SPDX-License-Identifier: GPL-2.0
3 * temp.c Thermal management for cpu's with Thermal Assist Units
8 * dynamic power management to limit peak CPU temp (using ICTC)
11 * Silly, crazy ideas: use cpu load (from scheduler) and ICTC to extend battery
55 static void set_thresholds(unsigned long cpu) in set_thresholds() argument
60 mtspr(SPRN_THRM1, THRM1_THRES(tau[cpu].low) | THRM1_V | maybe_tie | THRM1_TID); in set_thresholds()
63 mtspr(SPRN_THRM2, THRM1_THRES(tau[cpu].high) | THRM1_V | maybe_tie); in set_thresholds()
66 static void TAUupdate(int cpu) in TAUupdate() argument
77 if (tau[cpu].low >= step_size) { in TAUupdate()
78 tau[cpu].low -= step_size; in TAUupdate()
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/openbmc/linux/arch/arm64/boot/dts/allwinner/
H A Dsun50i-h5.dtsi1 // SPDX-License-Identifier: (GPL-2.0+ OR MIT)
4 #include <arm/allwinner/sunxi-h3-h5.dtsi>
6 #include <dt-bindings/thermal/thermal.h>
10 #address-cells = <1>;
11 #size-cells = <0>;
13 cpu0: cpu@0 {
14 compatible = "arm,cortex-a53";
15 device_type = "cpu";
17 enable-method = "psci";
19 clock-latency-ns = <244144>; /* 8 32k periods */
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/openbmc/linux/arch/arm/boot/dts/ti/omap/
H A Domap3-cpu-thermal.dtsi1 // SPDX-License-Identifier: GPL-2.0-only
3 * Device Tree Source for OMAP3 SoC CPU thermal
5 * Copyright (C) 2017 Texas Instruments Incorporated - https://www.ti.com/
8 #include <dt-bindings/thermal/thermal.h>
10 cpu_thermal: cpu-thermal {
11 polling-delay-passive = <250>; /* milliseconds */
12 polling-delay = <1000>; /* milliseconds */
15 thermal-sensors = <&bandgap>;
30 cpu_cooling_maps: cooling-maps {
33 cooling-device =
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/openbmc/linux/Documentation/arch/x86/
H A Dintel-hfi.rst1 .. SPDX-License-Identifier: GPL-2.0
4 Hardware-Feedback Interface for scheduling on Intel Hardware
8 --------
11 IA-32 Architectures Software Developer's Manual (Intel SDM) Volume 3 Section
15 capability data for each CPU in the system. Linux can use the information from
19 -------------------------------
22 about the performance and energy efficiency of each CPU in the system. Each
23 capability is given as a unit-less quantity in the range [0-255]. Higher values
33 mechanism may be used to lower Thermal Design Power. Such change can be
44 --------------------------------
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