linux-kernel - Re: [PATCH 0/3] i2c: imx: Fix handling of arbitration loss

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Message-ID: <20200925070351.vrxdlmx6ijfzwbg7@pengutronix.de>
Date:   Fri, 25 Sep 2020 09:03:51 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Christian Eggers <ceggers@...i.de>
Cc:     Oleksij Rempel <linux@...pel-privat.de>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        NXP Linux Team <linux-imx@....com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        linux-i2c@...r.kernel.org
Subject: Re: [PATCH 0/3] i2c: imx: Fix handling of arbitration loss

On Thu, Sep 17, 2020 at 02:20:26PM +0200, Christian Eggers wrote:
> On my (noisy) system, I2C arbitration losses happen quite often. In it's
> current implementation, the IAL flag is partly handled, but has a
> number of shortcomings:
> 
> 1. The driver runs unnecessarily in a timeout when waiting for an
> interrupt.
> 
> 2. The driver performs 500 ms busy-waiting without any value.
> 
> 3. Arbitration loss errors may be reported one transfer later than they
> occured.
> 
> Best regards
> Christian
> 

Acked-by: Oleksij Rempel <o.rempel@...gutronix.de>

Thank you!

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