linux-kernel - [PATCH 12/17] regulator: s2mps11: refactor handling of external rail control

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Message-Id: <20250604-s2mpg1x-regulators-v1-12-6038740f49ae@linaro.org>
Date: Wed, 04 Jun 2025 16:25:51 +0100
From: André Draszik <andre.draszik@...aro.org>
To: Tudor Ambarus <tudor.ambarus@...aro.org>, Rob Herring <robh@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>, 
 Liam Girdwood <lgirdwood@...il.com>, Mark Brown <broonie@...nel.org>, 
 Lee Jones <lee@...nel.org>, Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: Peter Griffin <peter.griffin@...aro.org>, 
 Will McVicker <willmcvicker@...gle.com>, kernel-team@...roid.com, 
 linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-gpio@...r.kernel.org, 
 André Draszik <andre.draszik@...aro.org>
Subject: [PATCH 12/17] regulator: s2mps11: refactor handling of external
 rail control

Refactor s2mps14_pmic_enable_ext_control() and s2mps11_of_parse_cb()
slightly as a preparation for adding S2MPG10 and S2MPG11 support, as
both of those PMICs also support control of rails via GPIOs.

Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
 drivers/regulator/s2mps11.c | 86 ++++++++++++++++++++++++++++++---------------
 1 file changed, 57 insertions(+), 29 deletions(-)

diff --git a/drivers/regulator/s2mps11.c b/drivers/regulator/s2mps11.c
index d3739526add3c966eb2979b9be2e543b5ad9d89a..ff9124c998c685d9c598570148dca074e671a99b 100644
--- a/drivers/regulator/s2mps11.c
+++ b/drivers/regulator/s2mps11.c
@@ -328,27 +328,13 @@ static int s2mps11_regulator_set_suspend_disable(struct regulator_dev *rdev)
 				  rdev->desc->enable_mask, state);
 }
 
-static int s2mps11_of_parse_cb(struct device_node *np,
-			       const struct regulator_desc *desc,
-			       struct regulator_config *config)
+static int s2mps11_of_parse_gpiod(struct device_node *np,
+				  const struct regulator_desc *desc,
+				  struct regulator_config *config)
 {
-	const struct s2mps11_info *s2mps11 = config->driver_data;
 	struct gpio_desc *ena_gpiod;
 	int ret;
 
-	if (s2mps11->dev_type == S2MPS14X)
-		switch (desc->id) {
-		case S2MPS14_LDO10:
-		case S2MPS14_LDO11:
-		case S2MPS14_LDO12:
-			break;
-
-		default:
-			return 0;
-		}
-	else
-		return 0;
-
 	ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np),
 					   "samsung,ext-control", 0,
 					   GPIOD_OUT_HIGH |
@@ -380,6 +366,28 @@ static int s2mps11_of_parse_cb(struct device_node *np,
 	return 0;
 }
 
+static int s2mps11_of_parse_cb(struct device_node *np,
+			       const struct regulator_desc *desc,
+			       struct regulator_config *config)
+{
+	const struct s2mps11_info *s2mps11 = config->driver_data;
+
+	if (s2mps11->dev_type == S2MPS14X)
+		switch (desc->id) {
+		case S2MPS14_LDO10:
+		case S2MPS14_LDO11:
+		case S2MPS14_LDO12:
+			break;
+
+		default:
+			return 0;
+		}
+	else
+		return 0;
+
+	return s2mps11_of_parse_gpiod(np, desc, config);
+}
+
 static const struct regulator_ops s2mps11_ldo_ops = {
 	.list_voltage		= regulator_list_voltage_linear,
 	.map_voltage		= regulator_map_voltage_linear,
@@ -903,10 +911,16 @@ static const struct regulator_desc s2mps15_regulators[] = {
 };
 
 static int s2mps14_pmic_enable_ext_control(struct s2mps11_info *s2mps11,
-		struct regulator_dev *rdev)
+					   struct regulator_dev *rdev)
 {
-	return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
-			rdev->desc->enable_mask, S2MPS14_ENABLE_EXT_CONTROL);
+	int ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg,
+				     rdev->desc->enable_mask,
+				     S2MPS14_ENABLE_EXT_CONTROL);
+	if (ret < 0)
+		return dev_err_probe(rdev_get_dev(rdev), ret,
+				     "failed to enable GPIO control over %d/%s\n",
+				     rdev->desc->id, rdev->desc->name);
+	return 0;
 }
 
 static int s2mpu02_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay)
@@ -1244,6 +1258,26 @@ static const struct regulator_desc s2mpu05_regulators[] = {
 	regulator_desc_s2mpu05_buck45(5),
 };
 
+static int s2mps11_handle_ext_control(struct s2mps11_info *s2mps11,
+				      struct regulator_dev *rdev)
+{
+	int ret;
+
+	switch (s2mps11->dev_type) {
+	case S2MPS14X:
+		if (!rdev->ena_pin)
+			return 0;
+
+		ret = s2mps14_pmic_enable_ext_control(s2mps11, rdev);
+		break;
+
+	default:
+		return 0;
+	}
+
+	return ret;
+}
+
 static int s2mps11_pmic_probe(struct platform_device *pdev)
 {
 	struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -1314,15 +1348,9 @@ static int s2mps11_pmic_probe(struct platform_device *pdev)
 					     regulators[i].id,
 					     regulators[i].name);
 
-		if (regulator->ena_pin) {
-			ret = s2mps14_pmic_enable_ext_control(s2mps11,
-							      regulator);
-			if (ret < 0)
-				return dev_err_probe(&pdev->dev, ret,
-						     "failed to enable GPIO control over %d/%s\n",
-						     regulator->desc->id,
-						     regulator->desc->name);
-		}
+		ret = s2mps11_handle_ext_control(s2mps11, regulator);
+		if (ret < 0)
+			return ret;
 	}
 
 	return 0;

-- 
2.49.0.1204.g71687c7c1d-goog