diff options
Diffstat (limited to 'Bindings/thermal')
| -rw-r--r-- | Bindings/thermal/exynos-thermal.txt | 18 | ||||
| -rw-r--r-- | Bindings/thermal/mediatek-thermal.txt | 43 | ||||
| -rw-r--r-- | Bindings/thermal/nvidia,tegra124-soctherm.txt (renamed from Bindings/thermal/tegra-soctherm.txt) | 14 | ||||
| -rw-r--r-- | Bindings/thermal/rcar-thermal.txt | 38 | ||||
| -rw-r--r-- | Bindings/thermal/tango-thermal.txt | 17 | ||||
| -rw-r--r-- | Bindings/thermal/thermal-generic-adc.txt | 89 |
6 files changed, 212 insertions, 7 deletions
diff --git a/Bindings/thermal/exynos-thermal.txt b/Bindings/thermal/exynos-thermal.txt index 695150a4136b..70b4c16c7ed8 100644 --- a/Bindings/thermal/exynos-thermal.txt +++ b/Bindings/thermal/exynos-thermal.txt @@ -11,6 +11,7 @@ "samsung,exynos5420-tmu" for TMU channel 0, 1 on Exynos5420 "samsung,exynos5420-tmu-ext-triminfo" for TMU channels 2, 3 and 4 Exynos5420 (Must pass triminfo base and triminfo clock) + "samsung,exynos5433-tmu" "samsung,exynos5440-tmu" "samsung,exynos7-tmu" - interrupt-parent : The phandle for the interrupt controller @@ -40,9 +41,14 @@ for current TMU channel -- "tmu_sclk" clock for functional operation of the current TMU channel -- vtmu-supply: This entry is optional and provides the regulator node supplying - voltage to TMU. If needed this entry can be placed inside - board/platform specific dts file. + +The Exynos TMU supports generating interrupts when reaching given +temperature thresholds. Number of supported thermal trip points depends +on the SoC (only first trip points defined in DT will be configured): + - most of SoC: 4 + - samsung,exynos5433-tmu: 8 + - samsung,exynos7-tmu: 8 + Following properties are mandatory (depending on SoC): - samsung,tmu_gain: Gain value for internal TMU operation. - samsung,tmu_reference_voltage: Value of TMU IP block's reference voltage @@ -56,6 +62,12 @@ Following properties are mandatory (depending on SoC): - samsung,tmu_default_temp_offset: Default temperature offset - samsung,tmu_cal_type: Callibration type +** Optional properties: + +- vtmu-supply: This entry is optional and provides the regulator node supplying + voltage to TMU. If needed this entry can be placed inside + board/platform specific dts file. + Example 1): tmu@100C0000 { diff --git a/Bindings/thermal/mediatek-thermal.txt b/Bindings/thermal/mediatek-thermal.txt new file mode 100644 index 000000000000..81f9a512bc2a --- /dev/null +++ b/Bindings/thermal/mediatek-thermal.txt @@ -0,0 +1,43 @@ +* Mediatek Thermal + +This describes the device tree binding for the Mediatek thermal controller +which measures the on-SoC temperatures. This device does not have its own ADC, +instead it directly controls the AUXADC via AHB bus accesses. For this reason +this device needs phandles to the AUXADC. Also it controls a mux in the +apmixedsys register space via AHB bus accesses, so a phandle to the APMIXEDSYS +is also needed. + +Required properties: +- compatible: "mediatek,mt8173-thermal" +- reg: Address range of the thermal controller +- interrupts: IRQ for the thermal controller +- clocks, clock-names: Clocks needed for the thermal controller. required + clocks are: + "therm": Main clock needed for register access + "auxadc": The AUXADC clock +- resets: Reference to the reset controller controlling the thermal controller. +- mediatek,auxadc: A phandle to the AUXADC which the thermal controller uses +- mediatek,apmixedsys: A phandle to the APMIXEDSYS controller. +- #thermal-sensor-cells : Should be 0. See ./thermal.txt for a description. + +Optional properties: +- nvmem-cells: A phandle to the calibration data provided by a nvmem device. If + unspecified default values shall be used. +- nvmem-cell-names: Should be "calibration-data" + +Example: + + thermal: thermal@1100b000 { + #thermal-sensor-cells = <1>; + compatible = "mediatek,mt8173-thermal"; + reg = <0 0x1100b000 0 0x1000>; + interrupts = <0 70 IRQ_TYPE_LEVEL_LOW>; + clocks = <&pericfg CLK_PERI_THERM>, <&pericfg CLK_PERI_AUXADC>; + clock-names = "therm", "auxadc"; + resets = <&pericfg MT8173_PERI_THERM_SW_RST>; + reset-names = "therm"; + mediatek,auxadc = <&auxadc>; + mediatek,apmixedsys = <&apmixedsys>; + nvmem-cells = <&thermal_calibration_data>; + nvmem-cell-names = "calibration-data"; + }; diff --git a/Bindings/thermal/tegra-soctherm.txt b/Bindings/thermal/nvidia,tegra124-soctherm.txt index 6b68cd150405..edebfa0a985e 100644 --- a/Bindings/thermal/tegra-soctherm.txt +++ b/Bindings/thermal/nvidia,tegra124-soctherm.txt @@ -26,10 +26,14 @@ Required properties : of this property. See <dt-bindings/thermal/tegra124-soctherm.h> for a list of valid values when referring to thermal sensors. +Note: +- the "critical" type trip points will be set to SOC_THERM hardware as the +shut down temperature. Once the temperature of this thermal zone is higher +than it, the system will be shutdown or reset by hardware. Example : - soctherm@0,700e2000 { + soctherm@700e2000 { compatible = "nvidia,tegra124-soctherm"; reg = <0x0 0x700e2000 0x0 0x1000>; interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>; @@ -51,5 +55,13 @@ Example: referring to thermal sensors : thermal-sensors = <&soctherm TEGRA124_SOCTHERM_SENSOR_CPU>; + + trips { + cpu_shutdown_trip: shutdown-trip { + temperature = <102500>; + hysteresis = <1000>; + type = "critical"; + }; + }; }; }; diff --git a/Bindings/thermal/rcar-thermal.txt b/Bindings/thermal/rcar-thermal.txt index 332e625f6ed0..a8e52c8ccfcc 100644 --- a/Bindings/thermal/rcar-thermal.txt +++ b/Bindings/thermal/rcar-thermal.txt @@ -1,8 +1,9 @@ * Renesas R-Car Thermal Required properties: -- compatible : "renesas,thermal-<soctype>", "renesas,rcar-thermal" - as fallback. +- compatible : "renesas,thermal-<soctype>", + "renesas,rcar-gen2-thermal" (with thermal-zone) or + "renesas,rcar-thermal" (without thermal-zone) as fallback. Examples with soctypes are: - "renesas,thermal-r8a73a4" (R-Mobile APE6) - "renesas,thermal-r8a7779" (R-Car H1) @@ -10,7 +11,6 @@ Required properties: - "renesas,thermal-r8a7791" (R-Car M2-W) - "renesas,thermal-r8a7792" (R-Car V2H) - "renesas,thermal-r8a7793" (R-Car M2-N) - - "renesas,thermal-r8a7794" (R-Car E2) - reg : Address range of the thermal registers. The 1st reg will be recognized as common register if it has "interrupts". @@ -36,3 +36,35 @@ thermal@e61f0000 { 0xe61f0300 0x38>; interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>; }; + +Example (with thermal-zone): + +thermal-zones { + cpu_thermal: cpu-thermal { + polling-delay-passive = <1000>; + polling-delay = <5000>; + + thermal-sensors = <&thermal>; + + trips { + cpu-crit { + temperature = <115000>; + hysteresis = <0>; + type = "critical"; + }; + }; + cooling-maps { + }; + }; +}; + +thermal: thermal@e61f0000 { + compatible = "renesas,thermal-r8a7790", + "renesas,rcar-gen2-thermal", + "renesas,rcar-thermal"; + reg = <0 0xe61f0000 0 0x14>, <0 0xe61f0100 0 0x38>; + interrupts = <0 69 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp5_clks R8A7790_CLK_THERMAL>; + power-domains = <&cpg_clocks>; + #thermal-sensor-cells = <0>; +}; diff --git a/Bindings/thermal/tango-thermal.txt b/Bindings/thermal/tango-thermal.txt new file mode 100644 index 000000000000..212198d4b937 --- /dev/null +++ b/Bindings/thermal/tango-thermal.txt @@ -0,0 +1,17 @@ +* Tango Thermal + +The SMP8758 SoC includes 3 instances of this temperature sensor +(in the CPU, video decoder, and PCIe controller). + +Required properties: +- #thermal-sensor-cells: Should be 0 (see thermal.txt) +- compatible: "sigma,smp8758-thermal" +- reg: Address range of the thermal registers + +Example: + + cpu_temp: thermal@920100 { + #thermal-sensor-cells = <0>; + compatible = "sigma,smp8758-thermal"; + reg = <0x920100 12>; + }; diff --git a/Bindings/thermal/thermal-generic-adc.txt b/Bindings/thermal/thermal-generic-adc.txt new file mode 100644 index 000000000000..d72355502b78 --- /dev/null +++ b/Bindings/thermal/thermal-generic-adc.txt @@ -0,0 +1,89 @@ +General Purpose Analog To Digital Converter (ADC) based thermal sensor. + +On some of platforms, thermal sensor like thermistors are connected to +one of ADC channel and sensor resistance is read via voltage across the +sensor resistor. The voltage read across the sensor is mapped to +temperature using voltage-temperature lookup table. + +Required properties: +=================== +- compatible: Must be "generic-adc-thermal". +- temperature-lookup-table: Two dimensional array of Integer; lookup table + to map the relation between ADC value and + temperature. When ADC is read, the value is + looked up on the table to get the equivalent + temperature. + The first value of the each row of array is the + temperature in milliCelsius and second value of + the each row of array is the ADC read value. +- #thermal-sensor-cells: Should be 1. See ./thermal.txt for a description + of this property. + +Example : +#include <dt-bindings/thermal/thermal.h> + +i2c@7000c400 { + ads1015: ads1015@4a { + reg = <0x4a>; + compatible = "ads1015"; + sampling-frequency = <3300>; + #io-channel-cells = <1>; + }; +}; + +tboard_thermistor: thermal-sensor { + compatible = "generic-adc-thermal"; + #thermal-sensor-cells = <0>; + io-channels = <&ads1015 1>; + io-channel-names = "sensor-channel"; + temperature-lookup-table = < (-40000) 2578 + (-39000) 2577 + (-38000) 2576 + (-37000) 2575 + (-36000) 2574 + (-35000) 2573 + (-34000) 2572 + (-33000) 2571 + (-32000) 2569 + (-31000) 2568 + (-30000) 2567 + :::::::::: + 118000 254 + 119000 247 + 120000 240 + 121000 233 + 122000 226 + 123000 220 + 124000 214 + 125000 208>; +}; + +dummy_cool_dev: dummy-cool-dev { + compatible = "dummy-cooling-dev"; + #cooling-cells = <2>; /* min followed by max */ +}; + +thermal-zones { + Tboard { + polling-delay = <15000>; /* milliseconds */ + polling-delay-passive = <0>; /* milliseconds */ + thermal-sensors = <&tboard_thermistor>; + + trips { + therm_est_trip: therm_est_trip { + temperature = <40000>; + type = "active"; + hysteresis = <1000>; + }; + }; + + cooling-maps { + map0 { + trip = <&therm_est_trip>; + cooling-device = <&dummy_cool_dev THERMAL_NO_LIMIT THERMAL_NO_LIMIT>; + contribution = <100>; + }; + + }; + }; +}; |