pwm: tegra: Implement .apply() callback

To eventually get rid of all legacy drivers convert this driver to the
modern world implementing .apply().
This just pushed a variant of pwm_apply_legacy() into the driver that was
slightly simplified because the driver doesn't provide a .set_polarity()
callback.

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

diff --git a/drivers/pwm/pwm-tegra.c b/drivers/pwm/pwm-tegra.c
index 7fc03a9..dad9978 100644 (file)
--- a/drivers/pwm/pwm-tegra.c
+++ b/drivers/pwm/pwm-tegra.c
@@ -230,10 +230,34 @@ static void tegra_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm)
        pm_runtime_put_sync(pc->dev);
 }
 
+static int tegra_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
+                          const struct pwm_state *state)
+{
+       int err;
+       bool enabled = pwm->state.enabled;
+
+       if (state->polarity != PWM_POLARITY_NORMAL)
+               return -EINVAL;
+
+       if (!state->enabled) {
+               if (enabled)
+                       tegra_pwm_disable(chip, pwm);
+
+               return 0;
+       }
+
+       err = tegra_pwm_config(pwm->chip, pwm, state->duty_cycle, state->period);
+       if (err)
+               return err;
+
+       if (!enabled)
+               err = tegra_pwm_enable(chip, pwm);
+
+       return err;
+}
+
 static const struct pwm_ops tegra_pwm_ops = {
-       .config = tegra_pwm_config,
-       .enable = tegra_pwm_enable,
-       .disable = tegra_pwm_disable,
+       .apply = tegra_pwm_apply,
        .owner = THIS_MODULE,
 };