| Message ID | 20220714215334.78226-1-mairacanal@riseup.net |
|---|---|
| State | New |
| Headers | show |
| Series | [RESEND,v6] backlight: lp855x: Switch to atomic PWM API | expand |
On Thu, 14 Jul 2022, Maíra Canal wrote: > Remove legacy PWM interface (pwm_config, pwm_enable, pwm_disable) and > replace it for the atomic PWM API. > > Reviewed-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> > Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org> > Signed-off-by: Maíra Canal <mairacanal@riseup.net> Nit: This should be chronological. > --- > V1 -> V2: Initialize variable and simplify conditional loop > V2 -> V3: Fix assignment of NULL variable > V3 -> V4: Replace division for pwm_set_relative_duty_cycle > V4 -> V5: Fix overwrite of state.period > V5 -> V6: Fix duty cycle rounding and set period outside conditional loop > --- > drivers/video/backlight/lp855x_bl.c | 21 +++++++++------------ > 1 file changed, 9 insertions(+), 12 deletions(-) Applied, thanks.
diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c index 2b9e2bbbb03e..fc02c5c16055 100644 --- a/drivers/video/backlight/lp855x_bl.c +++ b/drivers/video/backlight/lp855x_bl.c @@ -218,9 +218,8 @@ static int lp855x_configure(struct lp855x *lp) static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br) { - unsigned int period = lp->pdata->period_ns; - unsigned int duty = br * period / max_br; struct pwm_device *pwm; + struct pwm_state state; /* request pwm device with the consumer name */ if (!lp->pwm) { @@ -230,18 +229,16 @@ static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br) lp->pwm = pwm; - /* - * FIXME: pwm_apply_args() should be removed when switching to - * the atomic PWM API. - */ - pwm_apply_args(pwm); + pwm_init_state(lp->pwm, &state); + } else { + pwm_get_state(lp->pwm, &state); } - pwm_config(lp->pwm, duty, period); - if (duty) - pwm_enable(lp->pwm); - else - pwm_disable(lp->pwm); + state.period = lp->pdata->period_ns; + state.duty_cycle = div_u64(br * state.period, max_br); + state.enabled = state.duty_cycle; + + pwm_apply_state(lp->pwm, &state); } static int lp855x_bl_update_status(struct backlight_device *bl)