Re: [PATCH v17 1/3] dt-bindings: Add bindings for Mediatek matrix keypad

[Yingjoe Chen]

Hi,


On Mon, 2020-08-10 at 14:40 +0800, Fengping Yu wrote:
> From: "fengping.yu" <fengping.yu@xxxxxxxxxxxx>
> 
> This patch add devicetree bindings for Mediatek matrix keypad driver.
> 
> Signed-off-by: fengping.yu <fengping.yu@xxxxxxxxxxxx>
> ---
>  .../devicetree/bindings/input/mtk-kpd.yaml    | 87 +++++++++++++++++++
>  1 file changed, 87 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/input/mtk-kpd.yaml
> 
> diff --git a/Documentation/devicetree/bindings/input/mtk-kpd.yaml b/Documentation/devicetree/bindings/input/mtk-kpd.yaml
> new file mode 100644
> index 000000000000..d74dd8a6fbde

<...>


> +  keypad,num-columns:
> +    description: Number of column lines connected to the keypad controller,
> +    it is not equal to PCB columns number, instead you should add required value
> +    for each IC. If not specified, the default value is 1.
> +
> +  keypad,num-rows:
> +    description: Number of row lines connected to the keypad controller, it is
> +    not equal to PCB rows number, instead you should add required value for each IC.
> +    If not specified, the default value is 1.

Your source code can't really handle dts without rows/columns
properties. Also, the default value doesn't make any sense. No IC will
have rows or columns set to 1.

Since these are IC specified, not board specified, I think you should
just have the correct numbers in driver.

Joe.C