From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Fri, 6 May 2022 16:48:06 +0000 (+0200)
Subject: pwm: tegra: Implement .apply() callback
X-Git-Tag: v5.19-rc1~80^2~8
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fd3ddd4355c0e5388b40d48321e2e834393a4912;p=thirdparty%2Fkernel%2Flinux.git

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 7fc03a9ec1546..dad9978c91861 100644
--- 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,
 };