linux-kernel - Re: [PATCH v5 2/2] i2c: mv64xxx: add an optional bus-reset-gpios property

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Message-ID: <ZTvS4TylOQQJ06He@finisterre.sirena.org.uk>
Date:   Fri, 27 Oct 2023 16:10:25 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Chris Packham <chris.packham@...iedtelesis.co.nz>,
        gregory.clement@...tlin.com, andi.shyti@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, Abel Vesa <abel.vesa@...aro.org>,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 2/2] i2c: mv64xxx: add an optional bus-reset-gpios
 property

On Fri, Oct 27, 2023 at 01:37:05PM +0200, Krzysztof Kozlowski wrote:

> The (2) above is not solveable easy in kernel and we already had nice
> talks about it just few days ago:
> 1. Apple case:
> https://social.treehouse.systems/@marcan/111268780311634160

Note that the Apple case is not a reset, it's a low power mode for the
device, though at the GPIO level the beheviour with tying together
multiple devices that need to coordinate their usage looks very similar.

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