ASoC: ssm2518: switch to using gpiod API

This patch converts the driver to newer gpiod API, so that we can stop
exporting OF-specific legacy gpio API.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Link: https://lore.kernel.org/r/20220920025804.1788667-2-dmitry.torokhov@gmail.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/ssm2518.c

@@ -6,13 +6,13 @@
  *  Author: Lars-Peter Clausen <lars@metafoo.de>
  */
 
+#include <linux/err.h>
 #include <linux/module.h>
 #include <linux/init.h>
 #include <linux/i2c.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
@@ -113,7 +113,7 @@ struct ssm2518 {
 	unsigned int sysclk;
 	const struct snd_pcm_hw_constraint_list *constraints;
 
-	int enable_gpio;
+	struct gpio_desc *enable_gpio;
 };
 
 static const struct reg_default ssm2518_reg_defaults[] = {
@@ -482,8 +482,8 @@ static int ssm2518_set_power(struct ssm2518 *ssm2518, bool enable)
 		regcache_mark_dirty(ssm2518->regmap);
 	}
 
-	if (gpio_is_valid(ssm2518->enable_gpio))
-		gpio_set_value(ssm2518->enable_gpio, enable);
+	if (ssm2518->enable_gpio)
+		gpiod_set_value_cansleep(ssm2518->enable_gpio, enable);
 
 	regcache_cache_only(ssm2518->regmap, !enable);
 
@@ -742,20 +742,14 @@ static int ssm2518_i2c_probe(struct i2c_client *i2c)
 	if (ssm2518 == NULL)
 		return -ENOMEM;
 
-	if (i2c->dev.of_node) {
-		ssm2518->enable_gpio = of_get_gpio(i2c->dev.of_node, 0);
-		if (ssm2518->enable_gpio < 0 && ssm2518->enable_gpio != -ENOENT)
-			return ssm2518->enable_gpio;
-	} else {
-		ssm2518->enable_gpio = -1;
-	}
-
-	if (gpio_is_valid(ssm2518->enable_gpio)) {
-		ret = devm_gpio_request_one(&i2c->dev, ssm2518->enable_gpio,
-				GPIOF_OUT_INIT_HIGH, "SSM2518 nSD");
+	/* Start with enabling the chip */
+	ssm2518->enable_gpio = devm_gpiod_get_optional(&i2c->dev, NULL,
+						       GPIOD_OUT_HIGH);
+	ret = PTR_ERR_OR_ZERO(ssm2518->enable_gpio);
 	if (ret)
 		return ret;
-	}
+
+	gpiod_set_consumer_name(ssm2518->enable_gpio, "SSM2518 nSD");
 
 	i2c_set_clientdata(i2c, ssm2518);