pwm: meson: Simplify using dev_err_probe()

Using dev_err_probe() emitting an error message mentioning a return
value and returning that value can be done in a single statement. Make
use of that to simplify the probe part of the driver. This has the
additional advantage to emit the symbolic name for the error instead of
the integer error value.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>

drivers/pwm/pwm-meson.c

@@ -468,10 +468,9 @@ static int meson_pwm_init_channels(struct meson_pwm *meson)
 		channel->mux.hw.init = &init;
 
 		err = devm_clk_hw_register(dev, &channel->mux.hw);
-		if (err) {
-			dev_err(dev, "failed to register %s: %d\n", name, err);
-			return err;
-		}
+		if (err)
+			return dev_err_probe(dev, err,
+					     "failed to register %s\n", name);
 
 		snprintf(name, sizeof(name), "%s#div%u", dev_name(dev), i);
 
@@ -491,10 +490,9 @@ static int meson_pwm_init_channels(struct meson_pwm *meson)
 		channel->div.lock = &meson->lock;
 
 		err = devm_clk_hw_register(dev, &channel->div.hw);
-		if (err) {
-			dev_err(dev, "failed to register %s: %d\n", name, err);
-			return err;
-		}
+		if (err)
+			return dev_err_probe(dev, err,
+					     "failed to register %s\n", name);
 
 		snprintf(name, sizeof(name), "%s#gate%u", dev_name(dev), i);
 
@@ -513,17 +511,13 @@ static int meson_pwm_init_channels(struct meson_pwm *meson)
 		channel->gate.lock = &meson->lock;
 
 		err = devm_clk_hw_register(dev, &channel->gate.hw);
-		if (err) {
-			dev_err(dev, "failed to register %s: %d\n", name, err);
-			return err;
-		}
+		if (err)
+			return dev_err_probe(dev, err, "failed to register %s\n", name);
 
 		channel->clk = devm_clk_hw_get_clk(dev, &channel->gate.hw, NULL);
-		if (IS_ERR(channel->clk)) {
-			err = PTR_ERR(channel->clk);
-			dev_err(dev, "failed to register %s: %d\n", name, err);
-			return err;
-		}
+		if (IS_ERR(channel->clk))
+			return dev_err_probe(dev, PTR_ERR(channel->clk),
+					     "failed to register %s\n", name);
 	}
 
 	return 0;
@@ -554,10 +548,9 @@ static int meson_pwm_probe(struct platform_device *pdev)
 		return err;
 
 	err = devm_pwmchip_add(&pdev->dev, &meson->chip);
-	if (err < 0) {
-		dev_err(&pdev->dev, "failed to register PWM chip: %d\n", err);
-		return err;
-	}
+	if (err < 0)
+		return dev_err_probe(&pdev->dev, err,
+				     "failed to register PWM chip\n");
 
 	return 0;
 }