regulator: lm363x: Pass descriptor instead of GPIO number

Instead of passing a global GPIO number, pass a descriptor looked
up with the standard devm_gpiod_get_index_optional() call.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/lm363x-regulator.c

@@ -16,7 +16,7 @@
 #include <linux/mfd/ti-lmu-register.h>
 #include <linux/module.h>
 #include <linux/of.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/of_regulator.h>
@@ -219,7 +219,7 @@ static const struct regulator_desc lm363x_regulator_desc[] = {
 	},
 };
 
-static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
+static struct gpio_desc *lm363x_regulator_of_get_enable_gpio(struct device *dev, int id)
 {
 	/*
 	 * Check LCM_EN1/2_GPIO is configured.
@@ -227,11 +227,11 @@ static int lm363x_regulator_of_get_enable_gpio(struct device_node *np, int id)
 	 */
 	switch (id) {
 	case LM3632_LDO_POS:
-		return of_get_named_gpio(np, "enable-gpios", 0);
+		return devm_gpiod_get_index_optional(dev, "enable", 0, GPIOD_OUT_LOW);
 	case LM3632_LDO_NEG:
-		return of_get_named_gpio(np, "enable-gpios", 1);
+		return devm_gpiod_get_index_optional(dev, "enable", 1, GPIOD_OUT_LOW);
 	default:
-		return -EINVAL;
+		return NULL;
 	}
 }
 
@@ -243,7 +243,8 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	struct regulator_dev *rdev;
 	struct device *dev = &pdev->dev;
 	int id = pdev->id;
-	int ret, ena_gpio;
+	struct gpio_desc *gpiod;
+	int ret;
 
 	cfg.dev = dev;
 	cfg.regmap = regmap;
@@ -252,10 +253,9 @@ static int lm363x_regulator_probe(struct platform_device *pdev)
 	 * LM3632 LDOs can be controlled by external pin.
 	 * Register update is required if the pin is used.
 	 */
-	ena_gpio = lm363x_regulator_of_get_enable_gpio(dev->of_node, id);
-	if (gpio_is_valid(ena_gpio)) {
-		cfg.ena_gpio = ena_gpio;
-		cfg.ena_gpio_flags = GPIOF_OUT_INIT_LOW;
+	gpiod = lm363x_regulator_of_get_enable_gpio(dev, id);
+	if (gpiod) {
+		cfg.ena_gpiod = gpiod;
 
 		ret = regmap_update_bits(regmap, LM3632_REG_BIAS_CONFIG,
 					 LM3632_EXT_EN_MASK,