Update Linux to v5.4.2

Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/regulator/max77686-regulator.c b/drivers/regulator/max77686-regulator.c
index bee0609..c8e579e 100644
--- a/drivers/regulator/max77686-regulator.c
+++ b/drivers/regulator/max77686-regulator.c
@@ -11,8 +11,7 @@
 #include <linux/kernel.h>
 #include <linux/bug.h>
 #include <linux/err.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
+#include <linux/gpio/consumer.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/regulator/driver.h>
@@ -76,6 +75,7 @@
 };
 
 struct max77686_data {
+	struct device *dev;
 	DECLARE_BITMAP(gpio_enabled, MAX77686_REGULATORS);
 
 	/* Array indexed by regulator id */
@@ -250,26 +250,34 @@
 		struct regulator_config *config)
 {
 	struct max77686_data *max77686 = config->driver_data;
+	int ret;
 
 	switch (desc->id) {
 	case MAX77686_BUCK8:
 	case MAX77686_BUCK9:
 	case MAX77686_LDO20 ... MAX77686_LDO22:
-		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;
+		config->ena_gpiod = gpiod_get_from_of_node(np,
+				"maxim,ena-gpios",
+				0,
+				GPIOD_OUT_HIGH | GPIOD_FLAGS_BIT_NONEXCLUSIVE,
+				"max77686-regulator");
+		if (IS_ERR(config->ena_gpiod))
+			config->ena_gpiod = NULL;
 		break;
 	default:
 		return 0;
 	}
 
-	if (gpio_is_valid(config->ena_gpio)) {
+	if (config->ena_gpiod) {
 		set_bit(desc->id, max77686->gpio_enabled);
 
-		return regmap_update_bits(config->regmap, desc->enable_reg,
-					  desc->enable_mask,
-					  MAX77686_GPIO_CONTROL);
+		ret = regmap_update_bits(config->regmap, desc->enable_reg,
+					 desc->enable_mask,
+					 MAX77686_GPIO_CONTROL);
+		if (ret) {
+			gpiod_put(config->ena_gpiod);
+			config->ena_gpiod = NULL;
+		}
 	}
 
 	return 0;
@@ -507,6 +515,7 @@
 	if (!max77686)
 		return -ENOMEM;
 
+	max77686->dev = &pdev->dev;
 	config.dev = iodev->dev;
 	config.regmap = iodev->regmap;
 	config.driver_data = max77686;