Re: [PATCH] i2c: omap: implement bus recovery

[Felipe Balbi <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>
> ---
> 
> Tested with AM437x IDK, AM437x SK, BeagleBoneBlack and Beagle X15 with
> 1000 iterations of i2cdetect on all available buses.
> 
> That said, I couldn't get any device to hold the bus busy so I could
> see this working. If anybody has any good way of forcing a condition
> so that we need bus recovery, I'd be glad to look at.

ping

-- 
balbi

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