On Sat, Apr 28, 2018 at 04:56:06PM +0300, Alexander Monakov wrote:
> Not all revisions of DW I2C controller implement the enable status register.
> On platforms where that's the case (e.g. BG2CD and SPEAr ARM SoCs), waiting
> for enable will time out as reading the unimplemented register yields zero.
>
> It was observed that reading the IC_ENABLE_STATUS register once suffices to
> avoid getting it stuck on Bay Trail hardware, so replace polling with one
> dummy read of the register.
>
> Cc: Ben Gardner <gardner.ben@xxxxxxxxx>
> Cc: Jarkko Nikula <jarkko.nikula@xxxxxxxxxxxxxxx>
> Cc: Wolfram Sang <wsa@xxxxxxxxxxxxx>
> Fixes: fba4adbbf670 ("i2c: designware: must wait for enable")
> Tested-by: Ben Gardner <gardner.ben@xxxxxxxxx>
> Signed-off-by: Alexander Monakov <amonakov@xxxxxxxxx>
Applied to for-current, thanks!
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