[PATCH v2] regulator:s5m8767: Fully convert to GPIO descriptors

[Song Chen <chensong_2000@xxxxxx>]

This converts s5m8767 regulator driver to use GPIO descriptors.

---
v1 - v2:
1, reedit commit message.
2, remove development code.
3, print error msg in dev_err_probe.
4, doesn't set gpiod directions until successfully requesting
   all gpiods. It's pretty much equivalent with original code.

Signed-off-by: Song Chen <chensong_2000@xxxxxx>
---
 drivers/regulator/s5m8767.c      | 106 ++++++++++++++-----------------
 include/linux/mfd/samsung/core.h |   4 +-
 2 files changed, 48 insertions(+), 62 deletions(-)

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index d25cd81e3f36..b23df037336b 100644
--- a/drivers/regulator/s5m8767.c
+++ b/drivers/regulator/s5m8767.c
@@ -5,7 +5,7 @@
 
 #include <linux/cleanup.h>
 #include <linux/err.h>
-#include <linux/of_gpio.h>
+#include <linux/of.h>
 #include <linux/gpio/consumer.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
@@ -35,8 +35,8 @@ struct s5m8767_info {
 	u8 buck2_vol[8];
 	u8 buck3_vol[8];
 	u8 buck4_vol[8];
-	int buck_gpios[3];
-	int buck_ds[3];
+	struct gpio_desc *buck_gpios[3];
+	struct gpio_desc *buck_ds[3];
 	int buck_gpioindex;
 };
 
@@ -272,9 +272,9 @@ static inline int s5m8767_set_high(struct s5m8767_info *s5m8767)
 {
 	int temp_index = s5m8767->buck_gpioindex;
 
-	gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
-	gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
-	gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
+	gpiod_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
+	gpiod_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
+	gpiod_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
 
 	return 0;
 }
@@ -283,9 +283,9 @@ static inline int s5m8767_set_low(struct s5m8767_info *s5m8767)
 {
 	int temp_index = s5m8767->buck_gpioindex;
 
-	gpio_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
-	gpio_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
-	gpio_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
+	gpiod_set_value(s5m8767->buck_gpios[2], temp_index & 0x1);
+	gpiod_set_value(s5m8767->buck_gpios[1], (temp_index >> 1) & 0x1);
+	gpiod_set_value(s5m8767->buck_gpios[0], (temp_index >> 2) & 0x1);
 
 	return 0;
 }
@@ -486,16 +486,19 @@ static int s5m8767_pmic_dt_parse_dvs_gpio(struct sec_pmic_dev *iodev,
 			struct sec_platform_data *pdata,
 			struct device_node *pmic_np)
 {
-	int i, gpio;
+	int i;
+	char label[32];
 
 	for (i = 0; i < 3; i++) {
-		gpio = of_get_named_gpio(pmic_np,
-					"s5m8767,pmic-buck-dvs-gpios", i);
-		if (!gpio_is_valid(gpio)) {
-			dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
-			return -EINVAL;
-		}
-		pdata->buck_gpios[i] = gpio;
+		snprintf(label, sizeof(label), "%s%d", "S5M8767 SET", i + 1);
+		pdata->buck_gpios[i] = devm_fwnode_gpiod_get_index(
+					iodev->dev,
+					of_fwnode_handle(pmic_np),
+					"s5m8767,pmic-buck-dvs",
+					i, GPIOD_OUT_LOW, label);
+		if (IS_ERR(pdata->buck_gpios[i]))
+			return dev_err_probe(iodev->dev, PTR_ERR(pdata->buck_gpios[i]),
+						"can't get GPIO\n");
 	}
 	return 0;
 }
@@ -504,16 +507,19 @@ static int s5m8767_pmic_dt_parse_ds_gpio(struct sec_pmic_dev *iodev,
 			struct sec_platform_data *pdata,
 			struct device_node *pmic_np)
 {
-	int i, gpio;
+	int i;
+	char label[32];
 
 	for (i = 0; i < 3; i++) {
-		gpio = of_get_named_gpio(pmic_np,
-					"s5m8767,pmic-buck-ds-gpios", i);
-		if (!gpio_is_valid(gpio)) {
-			dev_err(iodev->dev, "invalid gpio[%d]: %d\n", i, gpio);
-			return -EINVAL;
-		}
-		pdata->buck_ds[i] = gpio;
+		snprintf(label, sizeof(label), "%s%d", "S5M8767 DS", i + 2);
+		pdata->buck_ds[i] = devm_fwnode_gpiod_get_index(
+					iodev->dev,
+					of_fwnode_handle(pmic_np),
+					"s5m8767,pmic-buck-ds",
+					i, GPIOD_OUT_LOW, label);
+		if (IS_ERR(pdata->buck_ds[i]))
+			return dev_err_probe(iodev->dev, PTR_ERR(pdata->buck_ds[i]),
+						"can't get GPIO\n");
 	}
 	return 0;
 }
@@ -788,57 +794,37 @@ static int s5m8767_pmic_probe(struct platform_device *pdev)
 	if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 						pdata->buck4_gpiodvs) {
 
-		if (!gpio_is_valid(pdata->buck_gpios[0]) ||
-			!gpio_is_valid(pdata->buck_gpios[1]) ||
-			!gpio_is_valid(pdata->buck_gpios[2])) {
+		if (IS_ERR(pdata->buck_gpios[0]) ||
+			IS_ERR(pdata->buck_gpios[1]) ||
+			IS_ERR(pdata->buck_gpios[2])) {
 			dev_err(&pdev->dev, "GPIO NOT VALID\n");
 			return -EINVAL;
 		}
 
-		ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[0],
-					"S5M8767 SET1");
-		if (ret)
-			return ret;
-
-		ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[1],
-					"S5M8767 SET2");
-		if (ret)
-			return ret;
-
-		ret = devm_gpio_request(&pdev->dev, pdata->buck_gpios[2],
-					"S5M8767 SET3");
-		if (ret)
-			return ret;
-
 		/* SET1 GPIO */
-		gpio_direction_output(pdata->buck_gpios[0],
+		gpiod_direction_output(pdata->buck_gpios[0],
 				(s5m8767->buck_gpioindex >> 2) & 0x1);
 		/* SET2 GPIO */
-		gpio_direction_output(pdata->buck_gpios[1],
+		gpiod_direction_output(pdata->buck_gpios[1],
 				(s5m8767->buck_gpioindex >> 1) & 0x1);
 		/* SET3 GPIO */
-		gpio_direction_output(pdata->buck_gpios[2],
+		gpiod_direction_output(pdata->buck_gpios[2],
 				(s5m8767->buck_gpioindex >> 0) & 0x1);
 	}
 
-	ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[0], "S5M8767 DS2");
-	if (ret)
-		return ret;
-
-	ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[1], "S5M8767 DS3");
-	if (ret)
-		return ret;
-
-	ret = devm_gpio_request(&pdev->dev, pdata->buck_ds[2], "S5M8767 DS4");
-	if (ret)
-		return ret;
+	if (IS_ERR(pdata->buck_ds[0]) ||
+		IS_ERR(pdata->buck_ds[1]) ||
+		IS_ERR(pdata->buck_ds[2])) {
+		dev_err(&pdev->dev, "GPIO NOT VALID\n");
+		return -EINVAL;
+	}
 
 	/* DS2 GPIO */
-	gpio_direction_output(pdata->buck_ds[0], 0x0);
+	gpiod_direction_output(pdata->buck_ds[0], 0x0);
 	/* DS3 GPIO */
-	gpio_direction_output(pdata->buck_ds[1], 0x0);
+	gpiod_direction_output(pdata->buck_ds[1], 0x0);
 	/* DS4 GPIO */
-	gpio_direction_output(pdata->buck_ds[2], 0x0);
+	gpiod_direction_output(pdata->buck_ds[2], 0x0);
 
 	regmap_update_bits(s5m8767->iodev->regmap_pmic,
 			   S5M8767_REG_BUCK2CTRL, 1 << 1,
diff --git a/include/linux/mfd/samsung/core.h b/include/linux/mfd/samsung/core.h
index 750274d41fc0..c06fff66e755 100644
--- a/include/linux/mfd/samsung/core.h
+++ b/include/linux/mfd/samsung/core.h
@@ -79,8 +79,8 @@ struct sec_platform_data {
 	struct sec_opmode_data		*opmode;
 	int				num_regulators;
 
-	int				buck_gpios[3];
-	int				buck_ds[3];
+	struct gpio_desc		*buck_gpios[3];
+	struct gpio_desc		*buck_ds[3];
 	unsigned int			buck2_voltage[8];
 	bool				buck2_gpiodvs;
 	unsigned int			buck3_voltage[8];
-- 
2.25.1