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pwm: img: Implement .apply() callback

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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>
This commit is contained in:
Uwe Kleine-König 2021-10-29 12:56:17 +02:00 committed by Thierry Reding
parent 5e93d7782f
commit 0ee11b87c3
1 changed files with 26 additions and 3 deletions
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29
drivers/pwm/pwm-img.c
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@ -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,
};