ASoC: codecs: ak4104: move to GPIO consumer API

Get the reset GPIO through the GPIO consumer API. This allows specifying the
DT property as "reset-gpios" without breaking existing DT users.
Signed-off-by: Daniel Mack <daniel@zonque.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ak4104.c

@@ -13,7 +13,7 @@
 #include <linux/slab.h>
 #include <linux/spi/spi.h>
 #include <linux/of_device.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
 #include <sound/asoundef.h>
 #include <sound/core.h>
@@ -268,8 +268,8 @@ static const struct regmap_config ak4104_regmap = {
 
 static int ak4104_spi_probe(struct spi_device *spi)
 {
-	struct device_node *np = spi->dev.of_node;
 	struct ak4104_private *ak4104;
+	struct gpio_desc *reset_gpiod;
 	unsigned int val;
 	int ret;
 
@@ -297,19 +297,11 @@ static int ak4104_spi_probe(struct spi_device *spi)
 		return ret;
 	}
 
-	if (np) {
-		enum of_gpio_flags flags;
-		int gpio = of_get_named_gpio_flags(np, "reset-gpio", 0, &flags);
-
-		if (gpio_is_valid(gpio)) {
-			ret = devm_gpio_request_one(&spi->dev, gpio,
-				     flags & OF_GPIO_ACTIVE_LOW ?
-					GPIOF_OUT_INIT_LOW : GPIOF_OUT_INIT_HIGH,
-				     "ak4104 reset");
-			if (ret < 0)
-				return ret;
-		}
-	}
+	reset_gpiod = devm_gpiod_get_optional(&spi->dev, "reset",
+					      GPIOD_OUT_HIGH);
+	if (IS_ERR(reset_gpiod) &&
+	    PTR_ERR(reset_gpiod) == -EPROBE_DEFER)
+		return -EPROBE_DEFER;
 
 	/* read the 'reserved' register - according to the datasheet, it
 	 * should contain 0x5b. Not a good way to verify the presence of