[PATCH v2 1/2] dt-bindings: Document the hi6220 thermal sensor bindings

[Xinwei Kong <kong.kongxinwei@hisilicon.com>]

From: kongxinwei <kong.kongxinwei@hisilicon.com>

This adds documentation of device tree bindings for the
thermal sensor controller of hi6220 SoC.

Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: kongxinwei <kong.kongxinwei@hisilicon.com>
---
 .../bindings/thermal/hisilicon-thermal.txt         | 45 ++++++++++++++++++++++
 1 file changed, 45 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/thermal/hisilicon-thermal.txt

diff --git a/Documentation/devicetree/bindings/thermal/hisilicon-thermal.txt b/Documentation/devicetree/bindings/thermal/hisilicon-thermal.txt
new file mode 100644
index 0000000..ceb6e2e
--- /dev/null
+++ b/Documentation/devicetree/bindings/thermal/hisilicon-thermal.txt
@@ -0,0 +1,45 @@
+* Hisilicon Thermal
+
+This driver is for hi6220 SoC which contain 4 thermal sensor.
+
+	1. sensor 0: local sensor;
+	2. sensor 1: remote sensor for ACPU cluster 1;
+	3. sensor 2: remote sensor for ACPU cluster 2;
+	4. sensor 3: remote sensor for GPU.
+
+Every sensor use one child node to represent it, so thermal sensor include
+parent node and four child node. The parent node describe common feature and
+child node describe private feature for thermal sensor;
+
+** Required properties :
+
+- compatible: "hisilicon,tsensor".
+- reg: physical base address of thermal sensor and length of memory mapped
+  region.
+- interrupt: The interrupt number to the cpu. Defines the interrupt used
+  by SOCTHERM.
+- clock-names: Input clock name, should be 'thermal_clk'.
+- clocks: phandles for clock specified in "clock-names" property.
+- #thermal-sensor-cells: Should be 1. See ./thermal.txt for a description.
+
+** Required properties for child nodes :
+
+- hisilicon,tsensor-id: the index of thermal sensor and use it to distinguish
+  thermal sensor. For example: <0> stands for local sensor; <1> stands for
+  acpu1 sensor;
+
+Example :
+
+	tsensor: tsensor@0,f7030700 {
+		compatible = "hisilicon,tsensor";
+		reg = <0x0 0xf7030700 0x0 0x1000>;
+		interrupts = <0 7 0x4>;
+		clocks = <&clock_sys HI6220_TSENSOR_CLK>;
+		clock-names = "thermal_clk";
+		#thermal-sensor-cells = <1>;
+
+		local_sensor {
+			hisilicon,tsensor-id = <0>;
+		}
+		.......
+	}
-- 
1.9.1