On Thu, Dec 6, 2018 at 2:41 PM Vokáč Michal <Michal.Vokac@xxxxxxxxx> wrote: > Output of the PWM block on i.MX SoCs is always low when the block is > disabled. This can cause issues when inverted PWM polarity is needed. > With inverted polarity a duty cycle = 0% corresponds to high level on > the output. Now, when PWM is disabled its output instantly goes low > which corresponds to duty cycle = 100%. > > To get a truly inverted PWM output two pinctrl states of the PWM pin > can be used. Configure the pin to GPIO function when PWM is disabled > and switch back to PWM function whenever non-zero duty cycle is needed. > > Signed-off-by: Michal Vokáč <michal.vokac@xxxxxxxxx> > --- > Changes in v3: > - Slightly different description of the pinctrl and pwm-gpio. This looks good to me. Acked-by: Linus Walleij <linus.walleij@xxxxxxxxxx> Yours, Linus Walleij
