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由 Doug Anderson 提交于
The rk3288 has the ability to invert the polarity of the PWM. Let's enable that ability. Note that this increases pwm_cells to 3 for rk3288. Signed-off-by: NDoug Anderson <dianders@chromium.org> Reviewed-by: NCaesar Wang <caesar.wang@rock-chips.com> Signed-off-by: NThierry Reding <thierry.reding@gmail.com>
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