Commit 399c168a authored by David Wu's avatar David Wu Committed by Wolfram Sang

i2c: rk3x: Give the tuning value 0 during rk3x_i2c_v0_calc_timings

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: default avatarDavid Wu <david.wu@rock-chips.com>
Tested-by: default avatarAndy Yan <andy.yan@rock-chips.com>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
parent ae824f00
......@@ -694,6 +694,8 @@ static int rk3x_i2c_v0_calc_timings(unsigned long clk_rate,
t_calc->div_low--;
t_calc->div_high--;
/* Give the tuning value 0, that would not update con register */
t_calc->tuning = 0;
/* Maximum divider supported by hw is 0xffff */
if (t_calc->div_low > 0xffff) {
t_calc->div_low = 0xffff;
......
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