bus: ts-nbus: Convert to atomic pwm API

With this change the PWM hardware is only configured once (instead of
three times).

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: Uwe Kleine-König

drivers/bus/ts-nbus.c

@@ -273,7 +273,7 @@ EXPORT_SYMBOL_GPL(ts_nbus_write);
 static int ts_nbus_probe(struct platform_device *pdev)
 {
 	struct pwm_device *pwm;
-	struct pwm_args pargs;
+	struct pwm_state state;
 	struct device *dev = &pdev->dev;
 	struct ts_nbus *ts_nbus;
 	int ret;
@@ -296,25 +296,22 @@ static int ts_nbus_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	pwm_get_args(pwm, &pargs);
-	if (!pargs.period) {
+	pwm_init_state(pwm, &state);
+	if (!state.period) {
 		dev_err(&pdev->dev, "invalid PWM period\n");
 		return -EINVAL;
 	}
 
-	/*
-	 * FIXME: pwm_apply_args() should be removed when switching to
-	 * the atomic PWM API.
-	 */
-	pwm_apply_args(pwm);
-	ret = pwm_config(pwm, pargs.period, pargs.period);
+	state.duty_cycle = state.period;
+	state.enabled = true;
+
+	ret = pwm_apply_state(pwm, &state);
 	if (ret < 0)
 		return ret;
 
 	/*
 	 * we can now start the FPGA and populate the peripherals.
 	 */
-	pwm_enable(pwm);
 	ts_nbus->pwm = pwm;
 
 	/*