regulator: max77686: Fix shared GPIOs

This reverts commit c89c00e2 "regulator: max77686: Pass descriptor
instead of GPIO number" as it has problems with shared GPIOs similar to
that on s2mps11.
Reported-by: NBartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

drivers/regulator/max77686-regulator.c

@@ -25,7 +25,8 @@
 #include <linux/kernel.h>
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio/consumer.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
@@ -89,7 +90,6 @@ enum max77686_ramp_rate {
 };
 
 struct max77686_data {
-	struct device *dev;
 	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
 
 	/* Array indexed by regulator id */
@@ -269,20 +269,16 @@ static int max77686_of_parse_cb(struct device_node *np,
 	case MAX77686_BUCK8:
 	case MAX77686_BUCK9:
 	case MAX77686_LDO20 ... MAX77686_LDO22:
-		config->ena_gpiod = devm_gpiod_get_from_of_node(max77686->dev,
-								np,
-								"maxim,ena",
-								0,
-								GPIOD_OUT_HIGH,
-								"max77686-regulator");
-		if (IS_ERR(config->ena_gpiod))
-			config->ena_gpiod = NULL;
+		config->ena_gpio = of_get_named_gpio(np,
+					"maxim,ena-gpios", 0);
+		config->ena_gpio_flags = GPIOF_OUT_INIT_HIGH;
+		config->ena_gpio_initialized = true;
 		break;
 	default:
 		return 0;
 	}
 
-	if (config->ena_gpiod) {
+	if (gpio_is_valid(config->ena_gpio)) {
 		set_bit(desc->id, max77686->gpio_enabled);
 
 		return regmap_update_bits(config->regmap, desc->enable_reg,
@@ -525,7 +521,6 @@ static int max77686_pmic_probe(struct platform_device *pdev)
 	if (!max77686)
 		return -ENOMEM;
 
-	max77686->dev = &pdev->dev;
 	config.dev = iodev->dev;
 	config.regmap = iodev->regmap;
 	config.driver_data = max77686;