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

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Date:   Wed,  2 Aug 2023 22:10:31 +0200
From:   Andi Shyti <andi.shyti@...nel.org>
To:     aisheng.dong@....com, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, carlos.song@....com
Cc:     Andi Shyti <andi.shyti@...nel.org>, 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

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

https://git.kernel.org/pub/scm/linux/kernel/git/andi.shyti/linux.git

Please note that this patch may still undergo further evaluation
and the final decision will be made in collaboration with
Wolfram.

Thank you,
Andi

Patches applied
===============
[1/1] i2c: imx-lpi2c: directly return ISR when detect a NACK
      commit: 7525bcc34ec49a39e8b56f5911431a5a2a981896