ASoC: rt5668: Convert to use GPIO descriptors

Convert the RT5668 to use GPIO descriptors and drop the
legacy GPIO headers.

We remove the global GPIO number from the platform data,
but it is still possible to create board files using GPIO
descriptor tables, if desired.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20230817-descriptors-asoc-rt-v2-3-02fa2ca3e5b0@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>

include/sound/rt5668.h

@@ -25,9 +25,6 @@ enum rt5668_jd_src {
 };
 
 struct rt5668_platform_data {
-
-	int ldo1_en; /* GPIO for LDO1_EN */
-
 	enum rt5668_dmic1_data_pin dmic1_data_pin;
 	enum rt5668_dmic1_clk_pin dmic1_clk_pin;
 	enum rt5668_jd_src jd_src;

sound/soc/codecs/rt5668.c

@@ -15,8 +15,7 @@
 #include <linux/platform_device.h>
 #include <linux/spi/spi.h>
 #include <linux/acpi.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/regulator/consumer.h>
 #include <linux/mutex.h>
 #include <sound/core.h>
@@ -43,6 +42,7 @@ static const char *rt5668_supply_names[RT5668_NUM_SUPPLIES] = {
 struct rt5668_priv {
 	struct snd_soc_component *component;
 	struct rt5668_platform_data pdata;
+	struct gpio_desc *ldo1_en;
 	struct regmap *regmap;
 	struct snd_soc_jack *hs_jack;
 	struct regulator_bulk_data supplies[RT5668_NUM_SUPPLIES];
@@ -2393,9 +2393,6 @@ static int rt5668_parse_dt(struct rt5668_priv *rt5668, struct device *dev)
 	of_property_read_u32(dev->of_node, "realtek,jd-src",
 		&rt5668->pdata.jd_src);
 
-	rt5668->pdata.ldo1_en = of_get_named_gpio(dev->of_node,
-		"realtek,ldo1-en-gpios", 0);
-
 	return 0;
 }
 
@@ -2497,10 +2494,12 @@ static int rt5668_i2c_probe(struct i2c_client *i2c)
 		return ret;
 	}
 
-	if (gpio_is_valid(rt5668->pdata.ldo1_en)) {
-		if (devm_gpio_request_one(&i2c->dev, rt5668->pdata.ldo1_en,
-					  GPIOF_OUT_INIT_HIGH, "rt5668"))
-			dev_err(&i2c->dev, "Fail gpio_request gpio_ldo\n");
+	rt5668->ldo1_en = devm_gpiod_get_optional(&i2c->dev,
+						  "realtek,ldo1-en",
+						  GPIOD_OUT_HIGH);
+	if (IS_ERR(rt5668->ldo1_en)) {
+		dev_err(&i2c->dev, "Fail gpio request ldo1_en\n");
+		return PTR_ERR(rt5668->ldo1_en);
 	}
 
 	/* Sleep for 300 ms miniumum */