From: Wolfram Sang <wsa-z923LK4zBo2bacvFa/9K2g@public.gmane.org>
To: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
Cc: Tony Lindgren <tony-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>,
Linux OMAP Mailing List
<linux-omap-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH] i2c: omap: implement bus recovery
Date: Fri, 10 Apr 2015 23:41:22 +0200 [thread overview]
Message-ID: <20150410214122.GB15596@katana> (raw)
In-Reply-To: <1424369209-26735-1-git-send-email-balbi-l0cyMroinI0@public.gmane.org>
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On Thu, Feb 19, 2015 at 12:06:49PM -0600, Felipe Balbi wrote:
> If either SCL or SDA are stuck low, we need to
> recover the bus using the procedure described
> on section 3.1.16 of the I2C specification.
>
> Note that we're trying to implement the procedure
> exactly as described by that section. First we
> check which line is stuck low, then implement
> one or the other procedure. If SDA recovery procedure
> fails, we reset our IP in an attempt to make it work.
>
> Signed-off-by: Felipe Balbi <balbi-l0cyMroinI0@public.gmane.org>
As Grygorii already mentioned: can you convert it to the standard i2c
bus recovery mechanism?
And is the timeout you replace with the recovery caused by SDA stuck
high (check the thread starting with
http://thread.gmane.org/gmane.linux.kernel/1841371/focus=22435)
Thanks,
Wolfram
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next prev parent reply other threads:[~2015-04-10 21:41 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-19 18:06 [PATCH] i2c: omap: implement bus recovery Felipe Balbi
[not found] ` <1424369209-26735-1-git-send-email-balbi-l0cyMroinI0@public.gmane.org>
2015-02-19 18:09 ` Felipe Balbi
2015-03-09 16:39 ` Felipe Balbi
[not found] ` <20150309163917.GI3739-HgARHv6XitJaoMGHk7MhZQC/G2K4zDHf@public.gmane.org>
2015-03-11 1:50 ` Felipe Balbi
2015-03-11 13:47 ` Grygorii Strashko
2015-03-11 15:22 ` Wolfram Sang
2015-04-10 21:41 ` Wolfram Sang [this message]
2015-05-06 16:44 ` Felipe Balbi
-- strict thread matches above, loose matches on Subject: below --
2015-05-06 16:50 Felipe Balbi
2015-05-12 19:19 ` Wolfram Sang
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