linux-kernel - Re: [PATCH v2 9/10] dt-bindings: pwm: update bindings for MT7628 SoC

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Message-ID: <1565783543.7006.8.camel@mtkswgap22>
Date:   Wed, 14 Aug 2019 19:52:23 +0800
From:   Ryder Lee <ryder.lee@...iatek.com>
To:     Sam Shih <sam.shih@...iatek.com>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        John Crispin <john@...ozen.org>, <linux-pwm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: Re: [PATCH v2 9/10] dt-bindings: pwm: update bindings for MT7628 SoC

On Wed, 2019-08-14 at 18:43 +0800, Sam Shih wrote:
> From: sam shih <sam.shih@...iatek.com>
> 
> This updates bindings for MT7628 pwm controller.
> 
> Signed-off-by: Sam Shih <sam.shih@...iatek.com>
> ---
>  .../devicetree/bindings/pwm/pwm-mediatek.txt       | 14 ++++++++++++++
>  1 file changed, 14 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
> index c7bd5633d1eb..9d2d893a07ff 100644
> --- a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
> +++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
> @@ -21,6 +21,8 @@ Required properties:
>   - pinctrl-0: One property must exist for each entry in pinctrl-names.
>     See pinctrl/pinctrl-bindings.txt for details of the property values.
>   - num-pwms: the number of PWM channels.
> + - clock-frequency: fix clock frequency, this is an optional property, only use in MT7628 SoC
> +                    for period calculation. This SoC has no complex clock tree.

Optional properties:

- clock-frequency: ...

>  Example:
>  	pwm0: pwm@...06000 {
> @@ -40,3 +42,13 @@ Example:
>  		pinctrl-0 = <&pwm0_pins>;
>  		num-pwms = <5>;
>  	};

Add a blank here

> +MT7628 Example:
> +	pwm: pwm@...0 {
> +		compatible = "mediatek,mt7628-pwm";
> +		reg = <0x5000 0x1000>;
> +		#pwm-cells = <2>;
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pwm0_pins>, <&pwm1_pins>;
> +		num-pwms = <4>;
> +		clock-frequency = <100000>;
> +	};