linux-kernel - Re: [PATCH v2 3/7] dt-bindings: mediatek,mt6779-keypad: add mediatek,keys-per-group

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Message-ID: <ff0341b1-e6a3-c2ff-4095-a6cc3641c82a@linaro.org>
Date:   Wed, 27 Jul 2022 12:27:58 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Mattijs Korpershoek <mkorpershoek@...libre.com>
Cc:     linux-arm-kernel@...ts.infradead.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Fabien Parent <fparent@...libre.com>,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        Fabien Parent <parent.f@...il.com>
Subject: Re: [PATCH v2 3/7] dt-bindings: mediatek,mt6779-keypad: add
 mediatek,keys-per-group

On 26/07/2022 14:56, Mattijs Korpershoek wrote:
> The MediaTek keypad has 2 modes of detecting key events:
> * single key: each (row, column) can detect one key
> * double key: each (row, column) is a group of 2 keys
> 
> With double key, two keys are physically wired to one (row, column) pin.
> These keys are in the same "group".
> 
> Multiple keys in the same group reduces the number of pins which
> minimizes cost.
> 
> Add a keys-per-group property to describe this.
> 
> Signed-off-by: Mattijs Korpershoek <mkorpershoek@...libre.com>


Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>


Best regards,
Krzysztof