linux-kernel - Re: [PATCH v4 2/2] i2c: mv64xxx: add an optional reset-gpios property

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Message-ID: <20231024233013.qtbdmnzek2flxk7a@zenone.zhora.eu>
Date:   Wed, 25 Oct 2023 01:30:13 +0200
From:   Andi Shyti <andi.shyti@...nel.org>
To:     Chris Packham <chris.packham@...iedtelesis.co.nz>
Cc:     gregory.clement@...tlin.com, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
        linux-i2c@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 2/2] i2c: mv64xxx: add an optional reset-gpios property

Hi Chris,

On Wed, Oct 25, 2023 at 11:30:32AM +1300, Chris Packham wrote:
> Some hardware designs have a GPIO used to control the reset of all the
> devices on and I2C bus. It's not possible for every child node to
> declare a reset-gpios property as only the first device probed would be
> able to successfully request it (the others will get -EBUSY). Represent
> this kind of hardware design by associating the reset-gpios with the
> parent I2C bus. The reset line will be released prior to the child I2C
> devices being probed.
> 
> Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>

Reviewed-by: Andi Shyti <andi.shyti@...nel.org>

Thanks,
Andi