linux-kernel - Re: [PATCH] ASoC: codecs: wsa884x: allow sharing reset GPIO

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Message-ID: <c17f56c1-a629-4b05-b807-42010f206f6c@sirena.org.uk>
Date:   Wed, 18 Oct 2023 16:07:57 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ASoC: codecs: wsa884x: allow sharing reset GPIO

On Wed, Oct 18, 2023 at 02:57:59PM +0200, Krzysztof Kozlowski wrote:
> On 18/10/2023 14:56, Mark Brown wrote:

> > I'd expect that the GPIO users should coordiante directly rather than
> > rely on the GPIO API to do the coordination for them - there aren't
> > enough semantics in the GPIO itself to do much more except possibly
> > provide discovery services (which would be nice).  Look at how the
> > regulator API manages multiple regulators sharing an enable GPIO for
> > example, it adds an additional layer of reference counting when it
> > identifies a shared GPIO.

> OK, it is still regulator core, though. Not individual drivers problem.

> Several other existing drivers have the same issue, so this should be
> solved in a generic or shared way.

Indeed.

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