backlight: lp855x: Switch to atomic PWM API

Remove legacy PWM interface (pwm_config, pwm_enable, pwm_disable) and
replace it for the atomic PWM API.

Signed-off-by: Maíra Canal <maira.canal@usp.br>

drivers/video/backlight/lp855x_bl.c

@@ -236,6 +236,7 @@ static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br)
 	unsigned int period = lp->pdata->period_ns;
 	unsigned int duty = br * period / max_br;
 	struct pwm_device *pwm;
+	struct pwm_state state;
 
 	/* request pwm device with the consumer name */
 	if (!lp->pwm) {
@@ -244,19 +245,19 @@ static void lp855x_pwm_ctrl(struct lp855x *lp, int br, int max_br)
 			return;
 
 		lp->pwm = pwm;
-
-		/*
-		 * FIXME: pwm_apply_args() should be removed when switching to
-		 * the atomic PWM API.
-		 */
-		pwm_apply_args(pwm);
 	}
 
-	pwm_config(lp->pwm, duty, period);
+	pwm_init_state(pwm, &state);
+
+	state.duty_cycle = duty;
+	state.period = period;
+
 	if (duty)
-		pwm_enable(lp->pwm);
+		state.enabled = true;
 	else
-		pwm_disable(lp->pwm);
+		state.enabled = false;
+
+	pwm_apply_state(pwm, &state);
 }
 
 static int lp855x_bl_update_status(struct backlight_device *bl)