On Tue, Mar 31, 2015 at 02:59:21PM +0800, Xinwei Kong wrote:
> From: kongxinwei <kong.kongxinwei@xxxxxxxxxxxxx>
>
> This adds documentation of device tree bindings for the
> thermal sensor controller of hi6220 SoC.
>
> Signed-off-by: Leo Yan <leo.yan@xxxxxxxxxx>
> Signed-off-by: kongxinwei <kong.kongxinwei@xxxxxxxxxxxxx>
> ---
> .../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;
Please show an example illustrating why this property is needed. The
example below doesn't show any per sensor properties aside from the
sensor id. Other bindings with a similar sub-sensor hardware design like
tegra-soctherm and rockchip-thermal don't have a need for a vendor
specific property like this. Their drivers simply iterate over an id
index during thermal sensor registration.
-Matt
> +
> +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
>
>
>
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