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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2016-06-10 05:30:17 -0300
commitd635711daa98be86d4c7fd01499c34f566b54ccb (patch)
treeaa5cc3760a27c3d57146498cb82fa549547de06c /Documentation/devicetree/bindings/thermal
parentc91265cd0efb83778f015b4d4b1129bd2cfd075e (diff)
Linux-libre 4.6.2-gnu
Diffstat (limited to 'Documentation/devicetree/bindings/thermal')
-rw-r--r--Documentation/devicetree/bindings/thermal/exynos-thermal.txt18
-rw-r--r--Documentation/devicetree/bindings/thermal/mediatek-thermal.txt43
2 files changed, 58 insertions, 3 deletions
diff --git a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt b/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
index 695150a41..70b4c16c7 100644
--- a/Documentation/devicetree/bindings/thermal/exynos-thermal.txt
+++ b/Documentation/devicetree/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/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt b/Documentation/devicetree/bindings/thermal/mediatek-thermal.txt
new file mode 100644
index 000000000..81f9a512b
--- /dev/null
+++ b/Documentation/devicetree/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";
+ };