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pwm: tegra: 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 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>
This commit is contained in:
Uwe Kleine-König 2022-05-06 18:48:06 +02:00 committed by Thierry Reding
parent 57c95faabf
commit fd3ddd4355
1 changed files with 27 additions and 3 deletions
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30
drivers/pwm/pwm-tegra.c
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@ -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,
};