pwm: img: Implement .apply() callback

To eventually get rid of all legacy drivers convert this driver to the
modern world implementing .apply(). This just pushes down a slightly
optimized variant of how legacy drivers are handled in the core.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Tested-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

diff --git a/drivers/pwm/pwm-img.c b/drivers/pwm/pwm-img.c
index f97f825482934197ea2a1216566431d3842ebf08..1f3d6346ab860956ca7914d47c8be3fea929eb73 100644 (file)
--- a/drivers/pwm/pwm-img.c
+++ b/drivers/pwm/pwm-img.c
@@ -184,10 +184,33 @@ static void img_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
        pm_runtime_put_autosuspend(chip->dev);
 }
 
+static int img_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+                        const struct pwm_state *state)
+{
+       int err;
+
+       if (state->polarity != PWM_POLARITY_NORMAL)
+               return -EINVAL;
+
+       if (!state->enabled) {
+               if (pwm->state.enabled)
+                       img_pwm_disable(chip, pwm);
+
+               return 0;
+       }
+
+       err = img_pwm_config(pwm->chip, pwm, state->duty_cycle, state->period);
+       if (err)
+               return err;
+
+       if (!pwm->state.enabled)
+               err = img_pwm_enable(chip, pwm);
+
+       return err;
+}
+
 static const struct pwm_ops img_pwm_ops = {
-       .config = img_pwm_config,
-       .enable = img_pwm_enable,
-       .disable = img_pwm_disable,
+       .apply = img_pwm_apply,
        .owner = THIS_MODULE,
 };