Re: [PATCH v4 1/3] dt-bindings: pwm: add MediaTek display PWM bindings

Daniel Kurtz
2015-07-08T12:11:09Z

On Mon, Jul 6, 2015 at 9:29 PM, YH Huang <yh.huang@mediatek.com> wrote:
> Document the device-tree binding of MediatTek display PWM.
> The PWM has one channel to control the backlight brightness for display.
> It supports MT8173 and MT6595.
>
> Signed-off-by: YH Huang <yh.huang@mediatek.com>
> ---
> .../devicetree/bindings/pwm/pwm-mtk-disp.txt | 24 ++++++++++++++++++++++
> 1 file changed, 24 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt
>
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt b/Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt
> new file mode 100644
> index 0000000..757b974
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt
> @@ -0,0 +1,24 @@
> +MediaTek display PWM controller
> +
> +Required properties:
> + - compatible: should be "mediatek,<name>-disp-pwm"
> + - "mediatek,mt8173-disp-pwm": found on mt8173 SoC
> + - "mediatek,mt6595-disp-pwm": found on mt6595 SoC
> + - reg: physical base address and length of the controller's registers
> + - #pwm-cells: must be 2. See pwm.txt in this directory for a description of
> + the cell format
> + - clocks: phandle and clock specifier of the PWM reference clock
> + - clock-names: must contain the following
> + - "main": clock used to generate PWM signals
> + - "mm": sync signals from the modules of mmsys
> +
> +Example:
> + pwm0: pwm@1401e000 {
> + compatible = "mediatek,mt8173-disp-pwm",
> + "mediatek,mt6595-disp-pwm";
> + reg = <0 0x1401e000 0 0x1000>;
> + #pwm-cells = <2>;
> + clocks = <&mmsys CLK_MM_DISP_PWM026M>,
> + <&mmsys CLK_MM_DISP_PWM0MM>;
> + clock-names = "main", "mm";

Should we include the pinctrl settings here to enable the PWM output?

> + };
> --
> 1.8.1.1.dirty
>
> --
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