pwm: ep93xx: Ensure configuring period and duty_cycle isn't wrongly skipped

As the last call to ep93xx_pwm_apply() might have exited early if
state->enabled was false, the values for period and duty_cycle stored in
pwm->state might not have been written to hardware and it must be
ensured that they are configured before enabling the PWM.

Fixes: 6d45374a ("pwm: ep93xx: Implement .apply callback")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-ep93xx.c

@@ -64,6 +64,11 @@ static int ep93xx_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 	int ret;
 	struct ep93xx_pwm *ep93xx_pwm = to_ep93xx_pwm(chip);
 	bool enabled = state->enabled;
+	void __iomem *base = ep93xx_pwm->base;
+	unsigned long long c;
+	unsigned long period_cycles;
+	unsigned long duty_cycles;
+	unsigned long term;
 
 	if (state->polarity != pwm->state.polarity) {
 		if (enabled) {
@@ -97,15 +102,6 @@ static int ep93xx_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 		return 0;
 	}
 
-	if (state->period != pwm->state.period ||
-	    state->duty_cycle != pwm->state.duty_cycle) {
-		struct ep93xx_pwm *ep93xx_pwm = to_ep93xx_pwm(chip);
-		void __iomem *base = ep93xx_pwm->base;
-		unsigned long long c;
-		unsigned long period_cycles;
-		unsigned long duty_cycles;
-		unsigned long term;
-
 	/*
 	 * The clock needs to be enabled to access the PWM registers.
 	 * Configuration can be changed at any time.
@@ -147,7 +143,6 @@ static int ep93xx_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 
 	if (ret)
 		return ret;
-	}
 
 	if (!enabled) {
 		ret = clk_prepare_enable(ep93xx_pwm->clk);