Re: [PATCH 2/4] i2c: at91: implement i2c bus recovery

[Phil Reid]

On 24/10/2019 23:07, Wolfram Sang wrote:
> > So at the beginning of a new transfer, we should check if SDA (or SCL?)
> > is low and, if it's true, only then we should try recover the bus.
>
> Yes, this is the proper time to do it. Remember, I2C does not define a
> timeout.

FYI: Just a single poll at the start of the transfer, for it being low, will cause problems with multi-master buses.
Bus recovery should be attempted after a timeout when trying to communicate, even thou i2c doesn't define a timeout.

I'm trying to fix the designware drivers handling of this at the moment.

--
Regards
Phil Reid