linux-kernel - Re: [PATCH v4] i2c: imx-lpi2c: directly return ISR when detect a NACK

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Message-ID: <ZNpB8fWnOcH8997V@shikoro>
Date:   Mon, 14 Aug 2023 17:02:09 +0200
From:   Wolfram Sang <wsa@...nel.org>
To:     Andi Shyti <andi.shyti@...nel.org>
Cc:     aisheng.dong@....com, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, carlos.song@....com,
        xiaoning.wang@....com, haibo.chen@....com, linux-imx@....com,
        linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] i2c: imx-lpi2c: directly return ISR when detect a NACK

On Wed, Aug 02, 2023 at 10:10:31PM +0200, Andi Shyti wrote:
> Hi
> 
> On Thu, 27 Jul 2023 11:03:47 +0800, carlos.song@....com wrote:
> > A NACK flag in ISR means i2c bus error. In such condition,
> > there is no need to do read/write operation.
> > 
> > In this patch, i2c will check MSR_NDF, MSR_RDF and MSR_TDF
> > flag in turn, it's making mutually exclusive NACK/read/write.
> > So when a NACK is received(MSR_NDF), i2c will return ISR
> > directly and then stop i2c transfer.
> > 
> > [...]
> 
> Applied to i2c/andi-for-next on

Applied to for-next (via Andi's tree), thanks!


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