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@xxxxxx> > --- > > 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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