Hey Bao,
On Wed, Jan 18, 2017 at 12:42:00PM +0800, Baoyou Xie wrote:
> This patch adds dt-binding documentation for zx2967 family thermal sensor.
>
> Signed-off-by: Baoyou Xie <baoyou....@linaro.org>
> Acked-by: Rob Herring <r...@kernel.org>
> Reviewed-by: Shawn Guo <shawn...@kernel.org>
> ---
> .../devicetree/bindings/thermal/zx2967-thermal.txt | 109
> +++++++++++++++++++++
> 1 file changed, 109 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/thermal/zx2967-thermal.txt
>
> diff --git a/Documentation/devicetree/bindings/thermal/zx2967-thermal.txt
> b/Documentation/devicetree/bindings/thermal/zx2967-thermal.txt
> new file mode 100644
> index 0000000..a96c8b3
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/thermal/zx2967-thermal.txt
> @@ -0,0 +1,109 @@
> +* ZTE zx2967 family Thermal
> +
> +Required Properties:
> +- compatible: should be one of the following.
> + * zte,zx296718-thermal
> +- reg: physical base address of the controller and length of memory mapped
> + region.
> +- clocks : Pairs of phandle and specifier referencing the controller's
> clocks.
> +- clock-names: "gate" for the topcrm clock.
> + "pclk" for the apb clock.
> +- #thermal-sensor-cells: must be 0.
> +
> +Example for tempsensor:
> +
> + tempsensor: tempsensor@148a000 {
> + compatible = "zte,zx296718-thermal";
> + reg = <0x0148a000 0x20>;
> + clocks = <&topcrm TEMPSENSOR_GATE>, <&audiocrm AUDIO_TS_PCLK>;
> + clock-names = "gate", "pclk";
> + #thermal-sensor-cells = <0>;
> + };
> +
> +Example for cooling device:
> +
> + cooling_dev: cooling_dev {
> + cluster0_cooling_dev: cluster0-cooling-dev {
> + #cooling-cells = <2>;
> + cpumask = <0xf>;
> + capacitance = <1500>;
> + };
> +
> + cluster1_cooling_dev: cluster1-cooling-dev {
> + #cooling-cells = <2>;
> + cpumask = <0x30>;
> + capacitance = <2000>;
> + };
> + };
> +
> +Example for thermal zones:
> +
> + thermal-zones {
> + zx296718_thermal: zx296718_thermal {
> + polling-delay-passive = <500>;
> + polling-delay = <1000>;
> + sustainable-power = <6500>;
> +
> + thermal-sensors = <&tempsensor 0>;
You may want to also add here:
coefficients = <1951 -922>;
Those will be populated in your tz->tzp->slope and tz->tz->offset.
Then you can read the already parsed data in your driver
in your .get_temp() callback, for example.
Can you please check if the above works for you?
BR,
Eduardo
