linux-kernel - Re: [PATCH v2 2/5] dt-bindings: input: Add document bindings for mtk-pmic-keys

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Date:   Thu, 10 Aug 2017 15:41:36 -0500
From:   Rob Herring <robh@...nel.org>
To:     Chen Zhong <chen.zhong@...iatek.com>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Lee Jones <lee.jones@...aro.org>,
        Eddie Huang <eddie.huang@...iatek.com>,
        Alessandro Zummo <a.zummo@...ertech.it>,
        Alexandre Belloni <alexandre.belloni@...e-electrons.com>,
        Jaechul Lee <jcsing.lee@...sung.com>,
        Jonathan Cameron <jic23@...nel.org>,
        Javier Martinez Canillas <javier@....samsung.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Beomho Seo <beomho.seo@...sung.com>,
        linux-input@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rtc@...r.kernel.org
Subject: Re: [PATCH v2 2/5] dt-bindings: input: Add document bindings for
 mtk-pmic-keys

On Mon, Aug 07, 2017 at 09:57:42AM +0800, Chen Zhong wrote:
> This patch adds the device tree binding documentation for the MediaTek
> pmic keys found on PMIC MT6397/MT6323.
> 
> Signed-off-by: Chen Zhong <chen.zhong@...iatek.com>
> ---
>  .../devicetree/bindings/input/mtk-pmic-keys.txt    |   36 ++++++++++++++++++++
>  1 file changed, 36 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
> 
> diff --git a/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt b/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
> new file mode 100644
> index 0000000..c5b230f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/mtk-pmic-keys.txt
> @@ -0,0 +1,36 @@
> +MediaTek MT6397/MT6323 PMIC Keys Device Driver
> +
> +There are two key functions provided by MT6397/MT6323 PMIC, pwrkey
> +and homekey. The key functions are defined as the subnode of the function
> +node provided by MT6397/MT6323 PMIC that is being defined as one kind
> +of Muti-Function Device (MFD)
> +
> +For MT6397/MT6323 MFD bindings see:
> +Documentation/devicetree/bindings/mfd/mt6397.txt
> +
> +Required properties:
> +- compatible: "mediatek,mt6397-keys" or "mediatek,mt6323-keys"
> +- mediatek,pwrkey-code: Keycode of pwrkey
> +
> +Optional Properties:
> +- mediatek,homekey-code: Keycode of homekey
> +- mediatek,long-press-mode: Long press key shutdown setting, 1 for
> +	pwrkey only, 2 for pwrkey/homekey together, others for disabled.
> +- mediatek,long-press-duration: Long press key shutdown duration setting,
> +	0/1/2/3 for 8/11/14/5 seconds.

Surely this could be a common property.

> +
> +Example:
> +
> +	pmic: mt6397 {
> +		compatible = "mediatek,mt6397";
> +
> +		...
> +
> +		mt6397keys: mt6397keys {
> +			compatible = "mediatek,mt6397-keys";
> +			mediatek,pwrkey-code = <116>;
> +			mediatek,homekey-code = <114>;

We have a standard properties for keycodes.

> +			mediatek,long-press-mode = <1>;
> +			mediatek,long-press-duration = <0>;
> +		};
> +	};
> \ No newline at end of file
> -- 
> 1.7.9.5
>