leds: lm3692x: Handle failure to probe the regulator

[ Upstream commit 396128d2 ]

Instead use devm_regulator_get_optional since the regulator
is optional and check for errors.
Signed-off-by: NGuido Günther <agx@sigxcpu.org>
Acked-by: NPavel Machek <pavel@ucw.cz>
Reviewed-by: NDan Murphy <dmurphy@ti.com>
Signed-off-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>

drivers/leds/leds-lm3692x.c

@@ -337,9 +337,18 @@ static int lm3692x_probe_dt(struct lm3692x_led *led)
 		return ret;
 	}
 
-	led->regulator = devm_regulator_get(&led->client->dev, "vled");
-	if (IS_ERR(led->regulator))
+	led->regulator = devm_regulator_get_optional(&led->client->dev, "vled");
+	if (IS_ERR(led->regulator)) {
+		ret = PTR_ERR(led->regulator);
+		if (ret != -ENODEV) {
+			if (ret != -EPROBE_DEFER)
+				dev_err(&led->client->dev,
+					"Failed to get vled regulator: %d\n",
+					ret);
+			return ret;
+		}
 		led->regulator = NULL;
+	}
 
 	child = device_get_next_child_node(&led->client->dev, child);
 	if (!child) {