[v13,2/5] dt-bindings: document Rockchip thermal

Commit Message

Wang Caesar Oct. 23, 2014, 9:40 a.m. UTC

This add the necessary binding documentation for the thermal
found on Rockchip SoCs

Signed-off-by: zhaoyifeng <[e-mail]>
Signed-off-by: Caesar Wang <[e-mail]>
---
 .../bindings/thermal/rockchip-thermal.txt          | 53 ++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/rockchip-thermal.txt

Patch

diff --git a/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
new file mode 100644
index 0000000..2860a93
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
@@ -0,0 +1,53 @@ 
+* Temperature Sensor ADC (TSADC) on rockchip SoCs
+
+Required properties:
+- compatible: "rockchip,rk3288-tsadc"
+- reg: physical base address of the controller and length of memory mapped
+       region.
+- interrupts: The interrupt number to the cpu. The interrupt specifier format
+	      depends on the interrupt controller.
+- clocks: Must contain an entry for each entry in clock-names.
+- clock-names: Shall be "tsadc" for the converter-clock, and "apb_pclk" for
+	       the peripheral clock.
+- #thermal-sensor-cells: Should be 1. See ./thermal.txt for a description.
+
+Exiample:
+tsadc: tsadc@ff280000 {
+	compatible = "rockchip,rk3288-tsadc";
+	reg = <0xff280000 0x100>;
+	interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
+	clocks = <&cru SCLK_TSADC>, <&cru PCLK_TSADC>;
+	clock-names = "tsadc", "apb_pclk";
+};
+
+Example: referring to thermal sensors:
+thermal-zones {
+	cpu_thermal: cpu_thermal {
+		polling-delay-passive = <500>; /* milliseconds */
+		polling-delay = <1000>; /* milliseconds */
+
+		/* sensor	ID */
+		thermal-sensors = <&tsadc	1>;
+
+		trips {
+			cpu_alert0: cpu_alert {
+				temperature = <80000>; /* millicelsius */
+				hysteresis = <2000>; /* millicelsius */
+				type = "passive";
+			};
+			cpu_crit: cpu_crit {
+				temperature = <125000>; /* millicelsius */
+				hysteresis = <2000>; /* millicelsius */
+				type = "critical";
+			};
+		};
+
+		cooling-maps {
+			map0 {
+				trip = <&cpu_alert0>;
+				cooling-device =
+					<&cpu0 THERMAL_NO_LIMIT THERMAL_NO_LIMIT>;
+			};
+		};
+	};
+};