linux-kernel - Re: [PATCH v1 08/25] dt-bindings: clock: mt8173: Add dummy clock ID

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Date:   Fri, 23 Dec 2022 09:52:52 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, mturquette@...libre.com
Cc:     sboyd@...nel.org, matthias.bgg@...il.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, wenst@...omium.org,
        johnson.wang@...iatek.com, miles.chen@...iatek.com,
        fparent@...libre.com, chun-jie.chen@...iatek.com,
        sam.shih@...iatek.com, y.oudjana@...tonmail.com,
        nfraprado@...labora.com, rex-bc.chen@...iatek.com,
        ryder.lee@...nel.org, daniel@...rotopia.org,
        jose.exposito89@...il.com, yangyingliang@...wei.com,
        pablo.sun@...iatek.com, msp@...libre.com, weiyi.lu@...iatek.com,
        ikjn@...omium.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, devicetree@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH v1 08/25] dt-bindings: clock: mt8173: Add dummy clock ID

On 22/12/2022 12:48, AngeloGioacchino Del Regno wrote:
> Some old MediaTek clock drivers are starting the clock count (so, the
> clock ID) from one instead of zero and this is logically incorrect,
> as we should start from 0.
> During a cleanup an issue emerged due to that and the cleanest and
> shortest way to keep devicetree backwards compatibility while still
> performing the well deserved cleanup is to add a dummy clock where
> needed, with ID 0.

Unfortunately I do not understand at all why adding dummy (fake) ID
cleans anything here. Unifying IDs to start from 0 is not an argument on
DT bindings header IDs.

Best regards,
Krzysztof