ASoC: max98357a: request GPIO when device get probed

devm_gpiod_get_optional() returns EBUSY after component rebound.

Request GPIO in max98357a_platform_probe() to support component
rebinding.
Signed-off-by: Tzung-Bi Shih <tzungbi@google.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/max98357a.c

@@ -59,21 +59,7 @@ static const struct snd_soc_dapm_route max98357a_dapm_routes[] = {
 	{"Speaker", NULL, "HiFi Playback"},
 };
 
-static int max98357a_component_probe(struct snd_soc_component *component)
-{
-	struct gpio_desc *sdmode;
-
-	sdmode = devm_gpiod_get_optional(component->dev, "sdmode", GPIOD_OUT_LOW);
-	if (IS_ERR(sdmode))
-		return PTR_ERR(sdmode);
-
-	snd_soc_component_set_drvdata(component, sdmode);
-
-	return 0;
-}
-
 static const struct snd_soc_component_driver max98357a_component_driver = {
-	.probe			= max98357a_component_probe,
 	.dapm_widgets		= max98357a_dapm_widgets,
 	.num_dapm_widgets	= ARRAY_SIZE(max98357a_dapm_widgets),
 	.dapm_routes		= max98357a_dapm_routes,
@@ -112,16 +98,20 @@ static struct snd_soc_dai_driver max98357a_dai_driver = {
 
 static int max98357a_platform_probe(struct platform_device *pdev)
 {
+	struct gpio_desc *sdmode;
+
+	sdmode = devm_gpiod_get_optional(&pdev->dev,
+				"sdmode", GPIOD_OUT_LOW);
+	if (IS_ERR(sdmode))
+		return PTR_ERR(sdmode);
+
+	dev_set_drvdata(&pdev->dev, sdmode);
+
 	return devm_snd_soc_register_component(&pdev->dev,
 			&max98357a_component_driver,
 			&max98357a_dai_driver, 1);
 }
 
-static int max98357a_platform_remove(struct platform_device *pdev)
-{
-	return 0;
-}
-
 #ifdef CONFIG_OF
 static const struct of_device_id max98357a_device_id[] = {
 	{ .compatible = "maxim,max98357a" },
@@ -145,7 +135,6 @@ static struct platform_driver max98357a_platform_driver = {
 		.acpi_match_table = ACPI_PTR(max98357a_acpi_match),
 	},
 	.probe	= max98357a_platform_probe,
-	.remove = max98357a_platform_remove,
 };
 module_platform_driver(max98357a_platform_driver);