From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Cc: mark.rutland-5wv7dgnIgG8@public.gmane.org,
michal.simek-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org,
soren.brinkmann-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
harinikatakamlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org
Subject: Re: [PATCH v6] i2c: cadence: Check for errata condition involving master receive
Date: Wed, 14 Jan 2015 11:37:18 +0100 [thread overview]
Message-ID: <20150114103718.GA2615@katana> (raw)
In-Reply-To: <1421174099-19839-1-git-send-email-harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
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On Wed, Jan 14, 2015 at 12:04:59AM +0530, Harini Katakam wrote:
> Cadence I2C controller has the following bugs:
> - completion indication is not given to the driver at the end of
> a read/receive transfer with HOLD bit set.
> - Invalid read transaction are generated on the bus when HW timeout
> condition occurs with HOLD bit set.
>
> As a result of the above, if a set of messages to be transferred with
> repeated start includes any message following a read message,
> completion is never indicated and timeout occurs.
> Hence a check is implemented to return -EOPNOTSUPP for such sequences.
>
> Signed-off-by: Harini Katakam <harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
> Signed-off-by: Vishnu Motghare <vishnum-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
Applied to for-next with some whitespace corrections, thanks!
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prev parent reply other threads:[~2015-01-14 10:37 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-13 18:34 [PATCH v6] i2c: cadence: Check for errata condition involving master receive Harini Katakam
[not found] ` <1421174099-19839-1-git-send-email-harinik-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org>
2015-01-14 10:37 ` Wolfram Sang [this message]
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