linux-kernel - Re: [PATCH v4 1/4] i2c: at91: Send bus clear command if SDA is down

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Date:   Tue, 5 May 2020 16:37:39 +0200
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Cc:     linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        ludovic.desroches@...rochip.com, nicolas.ferre@...rochip.com,
        alexandre.belloni@...tlin.com, robh+dt@...nel.org, peda@...ntia.se,
        linux@...linux.org.uk
Subject: Re: [PATCH v4 1/4] i2c: at91: Send bus clear command if SDA is down

On Tue, Feb 25, 2020 at 05:50:09PM +0200, Codrin Ciubotariu wrote:
> After a transfer timeout, some faulty I2C slave devices might hold down
> the SDA pin. We can generate a bus clear command, hoping that the slave
> might release the pins.
> If the CLEAR command is not supported, we will use gpio recovery, if
> available, to reset the bus.
> 
> Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>

Applied to for-next, thanks!


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