diff mbox series

[V2,2/2] regulator: s5m8767: Convert to GPIO descriptors

Message ID 20250327004945.563765-2-peng.fan@oss.nxp.com
State New
Headers show
Series [V2,1/2] gpiolib: of: Add polarity quirk for s5m8767 | expand

Commit Message

Peng Fan March 27, 2025, 12:49 a.m. UTC
From: Peng Fan <peng.fan@nxp.com>

Update the driver to fetch buck_gpio and buck_ds as GPIO descriptors.
Then drop the usage of 'of_gpio.h' which should be deprecated.
Based on commit 84618d5e31cf ("regulator: max8997:
Convert to GPIO descriptors") as a reference to make the changes.

With the quirk fix for s5m8767 in of_gpio_try_fixup_polarity,
the polarity will be active-high, even if exynos5250 spring DTS
wrongly use active-low polarity. So using GPIO descriptors,
it should work as before.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---

V2:
 To address Andy's comments:
  Typo fix
  Format update
  Use !!(temp_index & BIT(x))

  I not have devices to test, just my best practice to work out this patch.

 drivers/regulator/s5m8767.c | 146 ++++++++++--------------------------
 1 file changed, 38 insertions(+), 108 deletions(-)

Comments

Andy Shevchenko March 27, 2025, 11:37 a.m. UTC | #1
On Thu, Mar 27, 2025 at 08:49:45AM +0800, Peng Fan (OSS) wrote:

> Update the driver to fetch buck_gpio and buck_ds as GPIO descriptors.
> Then drop the usage of 'of_gpio.h' which should be deprecated.
> Based on commit 84618d5e31cf ("regulator: max8997:
> Convert to GPIO descriptors") as a reference to make the changes.
> 
> With the quirk fix for s5m8767 in of_gpio_try_fixup_polarity,
> the polarity will be active-high, even if exynos5250 spring DTS
> wrongly use active-low polarity. So using GPIO descriptors,
> it should work as before.

I was a bit trapped by the set_low and set_high callback implementation,
but I think I understood the idea behind and this code does not change
the original logic.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Krzysztof Kozlowski March 27, 2025, 4:54 p.m. UTC | #2
On 27/03/2025 01:49, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> Update the driver to fetch buck_gpio and buck_ds as GPIO descriptors.
> Then drop the usage of 'of_gpio.h' which should be deprecated.
> Based on commit 84618d5e31cf ("regulator: max8997:
> Convert to GPIO descriptors") as a reference to make the changes.
> 
> With the quirk fix for s5m8767 in of_gpio_try_fixup_polarity,
> the polarity will be active-high, even if exynos5250 spring DTS
> wrongly use active-low polarity. So using GPIO descriptors,
> it should work as before.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

Best regards,
Krzysztof
Linus Walleij March 28, 2025, 7:49 a.m. UTC | #3
On Thu, Mar 27, 2025 at 1:51 AM Peng Fan (OSS) <peng.fan@oss.nxp.com> wrote:

> From: Peng Fan <peng.fan@nxp.com>
>
> Update the driver to fetch buck_gpio and buck_ds as GPIO descriptors.
> Then drop the usage of 'of_gpio.h' which should be deprecated.
> Based on commit 84618d5e31cf ("regulator: max8997:
> Convert to GPIO descriptors") as a reference to make the changes.
>
> With the quirk fix for s5m8767 in of_gpio_try_fixup_polarity,
> the polarity will be active-high, even if exynos5250 spring DTS
> wrongly use active-low polarity. So using GPIO descriptors,
> it should work as before.
>
> Signed-off-by: Peng Fan <peng.fan@nxp.com>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij
diff mbox series

Patch

diff --git a/drivers/regulator/s5m8767.c b/drivers/regulator/s5m8767.c
index d25cd81e3f36..fe2631378ccd 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 & BIT(2)));
+	gpiod_set_value(s5m8767->buck_gpios[1], !!(temp_index & BIT(1)));
+	gpiod_set_value(s5m8767->buck_gpios[2], !!(temp_index & BIT(0)));
 
 	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 & BIT(0)));
+	gpiod_set_value(s5m8767->buck_gpios[1], !!(temp_index & BIT(1)));
+	gpiod_set_value(s5m8767->buck_gpios[0], !!(temp_index & BIT(2)));
 
 	return 0;
 }
@@ -482,42 +482,6 @@  static int s5m8767_enable_ext_control(struct s5m8767_info *s5m8767,
 
 
 #ifdef CONFIG_OF
-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;
-
-	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;
-	}
-	return 0;
-}
-
-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;
-
-	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;
-	}
-	return 0;
-}
-
 static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 					struct sec_platform_data *pdata)
 {
@@ -525,7 +489,7 @@  static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 	struct device_node *pmic_np, *reg_np;
 	struct sec_regulator_data *rdata;
 	struct sec_opmode_data *rmode;
-	unsigned int i, dvs_voltage_nr = 8, ret;
+	unsigned int i, dvs_voltage_nr = 8;
 
 	pmic_np = iodev->dev->of_node;
 	if (!pmic_np) {
@@ -635,10 +599,6 @@  static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 
 	if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 						pdata->buck4_gpiodvs) {
-		ret = s5m8767_pmic_dt_parse_dvs_gpio(iodev, pdata, pmic_np);
-		if (ret)
-			return -EINVAL;
-
 		if (of_property_read_u32(pmic_np,
 				"s5m8767,pmic-buck-default-dvs-idx",
 				&pdata->buck_default_idx)) {
@@ -652,10 +612,6 @@  static int s5m8767_pmic_dt_parse_pdata(struct platform_device *pdev,
 		}
 	}
 
-	ret = s5m8767_pmic_dt_parse_ds_gpio(iodev, pdata, pmic_np);
-	if (ret)
-		return -EINVAL;
-
 	pdata->buck2_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck2-ramp-enable");
 	pdata->buck3_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck3-ramp-enable");
 	pdata->buck4_ramp_enable = of_property_read_bool(pmic_np, "s5m8767,pmic-buck4-ramp-enable");
@@ -684,6 +640,8 @@  static int s5m8767_pmic_probe(struct platform_device *pdev)
 	struct regulator_config config = { };
 	struct s5m8767_info *s5m8767;
 	int i, ret, buck_init;
+	const char *gpiods_names[3] = { "S5M8767 DS2", "S5M8767 DS3", "S5M8767 DS4" };
+	const char *gpiodvs_names[3] = { "S5M8767 SET1", "S5M8767 SET2", "S5M8767 SET3" };
 
 	if (!pdata) {
 		dev_err(pdev->dev.parent, "Platform data not supplied\n");
@@ -731,12 +689,6 @@  static int s5m8767_pmic_probe(struct platform_device *pdev)
 	s5m8767->buck2_gpiodvs = pdata->buck2_gpiodvs;
 	s5m8767->buck3_gpiodvs = pdata->buck3_gpiodvs;
 	s5m8767->buck4_gpiodvs = pdata->buck4_gpiodvs;
-	s5m8767->buck_gpios[0] = pdata->buck_gpios[0];
-	s5m8767->buck_gpios[1] = pdata->buck_gpios[1];
-	s5m8767->buck_gpios[2] = pdata->buck_gpios[2];
-	s5m8767->buck_ds[0] = pdata->buck_ds[0];
-	s5m8767->buck_ds[1] = pdata->buck_ds[1];
-	s5m8767->buck_ds[2] = pdata->buck_ds[2];
 
 	s5m8767->ramp_delay = pdata->buck_ramp_delay;
 	s5m8767->buck2_ramp = pdata->buck2_ramp_enable;
@@ -787,58 +739,36 @@  static int s5m8767_pmic_probe(struct platform_device *pdev)
 
 	if (pdata->buck2_gpiodvs || pdata->buck3_gpiodvs ||
 						pdata->buck4_gpiodvs) {
+		for (i = 0; i < 3; i++) {
+			enum gpiod_flags flags;
 
-		if (!gpio_is_valid(pdata->buck_gpios[0]) ||
-			!gpio_is_valid(pdata->buck_gpios[1]) ||
-			!gpio_is_valid(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;
+			if (s5m8767->buck_gpioindex & BIT(2 - i))
+				flags = GPIOD_OUT_HIGH;
+			else
+				flags = GPIOD_OUT_LOW;
+
+			s5m8767->buck_gpios[i] = devm_gpiod_get_index(iodev->dev,
+								      "s5m8767,pmic-buck-dvs", i,
+								      flags);
+			if (IS_ERR(s5m8767->buck_gpios[i])) {
+				return dev_err_probe(iodev->dev, PTR_ERR(s5m8767->buck_gpios[i]),
+						     "invalid gpio[%d]\n", i);
+			}
 
-		/* SET1 GPIO */
-		gpio_direction_output(pdata->buck_gpios[0],
-				(s5m8767->buck_gpioindex >> 2) & 0x1);
-		/* SET2 GPIO */
-		gpio_direction_output(pdata->buck_gpios[1],
-				(s5m8767->buck_gpioindex >> 1) & 0x1);
-		/* SET3 GPIO */
-		gpio_direction_output(pdata->buck_gpios[2],
-				(s5m8767->buck_gpioindex >> 0) & 0x1);
+			gpiod_set_consumer_name(s5m8767->buck_gpios[i], gpiodvs_names[i]);
+		}
 	}
 
-	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;
-
-	/* DS2 GPIO */
-	gpio_direction_output(pdata->buck_ds[0], 0x0);
-	/* DS3 GPIO */
-	gpio_direction_output(pdata->buck_ds[1], 0x0);
-	/* DS4 GPIO */
-	gpio_direction_output(pdata->buck_ds[2], 0x0);
+	for (i = 0; i < 3; i++) {
+		s5m8767->buck_ds[i] = devm_gpiod_get_index(iodev->dev,
+							   "s5m8767,pmic-buck-ds", i,
+							   GPIOD_OUT_LOW);
+		if (IS_ERR(s5m8767->buck_ds[i])) {
+			return dev_err_probe(iodev->dev, PTR_ERR(s5m8767->buck_ds[i]),
+					     "can't get GPIO %d\n", i);
+		}
+		gpiod_set_consumer_name(s5m8767->buck_ds[i], gpiods_names[i]);
+	}
 
 	regmap_update_bits(s5m8767->iodev->regmap_pmic,
 			   S5M8767_REG_BUCK2CTRL, 1 << 1,