On Sat, Oct 22, 2016 at 04:43:42PM +0800, David Wu wrote:

We found a bug that i2c transfer sometimes failed on 3066a board with
stabel-4.8, the con register would be updated by uninitialized tuning
value, it made the i2c transfer failed.

So give the tuning value to be zero during rk3x_i2c_v0_calc_timings.

Signed-off-by: David Wu <redacted>

What I missed to say in my review:

Please use a subject line that describes WHY the change is needed not so
much WHAT is done. Like: "fix missing initialization causing boot
problems"