linux-kernel - Re: [PATCH net-next v4 1/2] dt-bindings: arm: mediatek: add mediatek,boottrap binding

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Message-ID: <7e8d0945-dfa9-7f61-b075-679e8a89ded9@linaro.org>
Date:   Fri, 12 May 2023 08:54:36 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andrew Lunn <andrew@...n.ch>, Daniel Golle <daniel@...rotopia.org>
Cc:     devicetree@...r.kernel.org, netdev@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Qingfang Deng <dqfext@...il.com>,
        SkyLake Huang <SkyLake.Huang@...iatek.com>,
        Simon Horman <simon.horman@...igine.com>
Subject: Re: [PATCH net-next v4 1/2] dt-bindings: arm: mediatek: add
 mediatek,boottrap binding

On 11/05/2023 17:53, Andrew Lunn wrote:
> On Thu, May 11, 2023 at 04:10:20PM +0200, Daniel Golle wrote:
>> The boottrap is used to read implementation details from the SoC, such
>> as the polarity of LED pins. Add bindings for it as we are going to use
>> it for the LEDs connected to MediaTek built-in 1GE PHYs.
> 
> What exactly is it? Fuses? Is it memory mapped, or does it need a
> driver to access it? How is it shared between its different users?

Yes, looks like some efuse/OTP/nvmem, so it should probably use nvmem
bindings and do not look different than other in such class.

Best regards,
Krzysztof