From: Wolfram Sang <wsa@the-dreams.de>
To: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i2c: uniphier-f: fix misdetection of incomplete STOP condition
Date: Fri, 23 Sep 2016 14:12:45 +0200 [thread overview]
Message-ID: <20160923121245.GA1580@katana> (raw)
In-Reply-To: <1474632241-10440-1-git-send-email-yamada.masahiro@socionext.com>
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On Fri, Sep 23, 2016 at 09:04:01PM +0900, Masahiro Yamada wrote:
> Currently, the status register FI2C_SR is checked immediately after
> a STOP condition is issued in case of the deferred STOP condition.
> It takes typically 5-10 usec until the corresponding bits in the
> register are set, so the error check for "stop condition was not
> completed" is very likely to be false positive.
>
> Add wait code to relax the status register check.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Use readl_poll_timeout?
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next prev parent reply other threads:[~2016-09-23 12:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-23 12:04 [PATCH] i2c: uniphier-f: fix misdetection of incomplete STOP condition Masahiro Yamada
2016-09-23 12:12 ` Wolfram Sang [this message]
2016-09-23 13:33 ` Masahiro Yamada
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