[PATCH 6/6] pwm: sun4i: don't delay if the PWM is already off

[Pascal Roeleven]

On 2021-05-31 06:46, Roman Beranek wrote:
> Signed-off-by: Roman Beranek <roman.beranek at prusa3d.com>
> ---
>  drivers/pwm/pwm-sun4i.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/pwm/pwm-sun4i.c b/drivers/pwm/pwm-sun4i.c
> index 6ab06b9749d0..88bd90498d1f 100644
> --- a/drivers/pwm/pwm-sun4i.c
> +++ b/drivers/pwm/pwm-sun4i.c
> @@ -304,7 +304,7 @@ static int sun4i_pwm_apply(struct pwm_chip *chip,
> struct pwm_device *pwm,
>  
>  	sun4i_pwm_writel(sun4i_pwm, ctrl, PWM_CTRL_REG);
>  
> -	if (state->enabled) {
> +	if (state->enabled || !cstate.enabled) {
>  		mutex_unlock(&sun4i_pwm->ctrl_lock);
>  		return 0;
>  	}

Btw, this now leaves the gate open if the controller is currently
disabled and we are only changing the period register and staying
disabled. This becomes an issue because we always expect the gate to be
disabled when the controller is disabled.

Regards,
Pascal