pinctrl: cy8c95x0: switch to using devm_regulator_get_enable()

The driver does not actively manage regulator state past probe() time,
so we can use devm_regulator_get_enable() to simplify the code.

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/20241110210040.18918-3-andy.shevchenko@gmail.com
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: andy-shev

drivers/pinctrl/pinctrl-cy8c95x0.c

@@ -141,7 +141,6 @@ static const struct dmi_system_id cy8c95x0_dmi_acpi_irq_info[] = {
  * @nport:          Number of Gports in this chip
  * @gpio_chip:      gpiolib chip
  * @driver_data:    private driver data
- * @regulator:      Pointer to the regulator for the IC
  * @dev:            struct device
  * @pctldev:        pin controller device
  * @pinctrl_desc:   pin controller description
@@ -163,7 +162,6 @@ struct cy8c95x0_pinctrl {
 	int nport;
 	struct gpio_chip gpio_chip;
 	unsigned long driver_data;
-	struct regulator *regulator;
 	struct device *dev;
 	struct pinctrl_dev *pctldev;
 	struct pinctrl_desc pinctrl_desc;
@@ -1434,7 +1432,6 @@ static int cy8c95x0_probe(struct i2c_client *client)
 	struct cy8c95x0_pinctrl *chip;
 	struct regmap_config regmap_conf;
 	struct regmap_range_cfg regmap_range_conf;
-	struct regulator *reg;
 	int ret;
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
@@ -1448,8 +1445,6 @@ static int cy8c95x0_probe(struct i2c_client *client)
 	if (!chip->driver_data)
 		return -ENODEV;
 
-	i2c_set_clientdata(client, chip);
-
 	chip->tpin = chip->driver_data & CY8C95X0_GPIO_MASK;
 	chip->nport = DIV_ROUND_UP(CY8C95X0_PIN_TO_OFFSET(chip->tpin), BANK_SZ);
 
@@ -1472,26 +1467,15 @@ static int cy8c95x0_probe(struct i2c_client *client)
 		return -ENODEV;
 	}
 
-	reg = devm_regulator_get(&client->dev, "vdd");
-	if (IS_ERR(reg)) {
-		if (PTR_ERR(reg) == -EPROBE_DEFER)
-			return -EPROBE_DEFER;
-	} else {
-		ret = regulator_enable(reg);
-		if (ret) {
-			dev_err(&client->dev, "failed to enable regulator vdd: %d\n", ret);
-			return ret;
-		}
-		chip->regulator = reg;
-	}
+	ret = devm_regulator_get_enable(&client->dev, "vdd");
+	if (ret)
+		return dev_err_probe(&client->dev, ret, "failed to enable regulator vdd\n");
 
 	/* bring the chip out of reset if reset pin is provided */
 	chip->gpio_reset = devm_gpiod_get_optional(&client->dev, "reset", GPIOD_OUT_HIGH);
-	if (IS_ERR(chip->gpio_reset)) {
-		ret = dev_err_probe(chip->dev, PTR_ERR(chip->gpio_reset),
-				    "Failed to get GPIO 'reset'\n");
-		goto err_exit;
-	} else if (chip->gpio_reset) {
+	if (IS_ERR(chip->gpio_reset))
+		return dev_err_probe(chip->dev, PTR_ERR(chip->gpio_reset), "Failed to get GPIO 'reset'\n");
+	if (chip->gpio_reset) {
 		usleep_range(1000, 2000);
 		gpiod_set_value_cansleep(chip->gpio_reset, 0);
 		usleep_range(250000, 300000);
@@ -1506,10 +1490,8 @@ static int cy8c95x0_probe(struct i2c_client *client)
 	regmap_conf.num_reg_defaults_raw = regmap_range_conf.range_max;
 
 	chip->regmap = devm_regmap_init_i2c(client, &regmap_conf);
-	if (IS_ERR(chip->regmap)) {
-		ret = PTR_ERR(chip->regmap);
-		goto err_exit;
-	}
+	if (IS_ERR(chip->regmap))
+		return PTR_ERR(chip->regmap);
 
 	bitmap_zero(chip->push_pull, MAX_LINE);
 	bitmap_zero(chip->shiftmask, MAX_LINE);
@@ -1525,31 +1507,14 @@ static int cy8c95x0_probe(struct i2c_client *client)
 	if (client->irq) {
 		ret = cy8c95x0_irq_setup(chip, client->irq);
 		if (ret)
-			goto err_exit;
+			return ret;
 	}
 
 	ret = cy8c95x0_setup_pinctrl(chip);
 	if (ret)
-		goto err_exit;
-
-	ret = cy8c95x0_setup_gpiochip(chip);
-	if (ret)
-		goto err_exit;
-
-	return 0;
-
-err_exit:
-	if (!IS_ERR_OR_NULL(chip->regulator))
-		regulator_disable(chip->regulator);
-	return ret;
-}
-
-static void cy8c95x0_remove(struct i2c_client *client)
-{
-	struct cy8c95x0_pinctrl *chip = i2c_get_clientdata(client);
+		return ret;
 
-	if (!IS_ERR_OR_NULL(chip->regulator))
-		regulator_disable(chip->regulator);
+	return cy8c95x0_setup_gpiochip(chip);
 }
 
 static const struct acpi_device_id cy8c95x0_acpi_ids[] = {
@@ -1565,7 +1530,6 @@ static struct i2c_driver cy8c95x0_driver = {
 		.acpi_match_table = cy8c95x0_acpi_ids,
 	},
 	.probe		= cy8c95x0_probe,
-	.remove		= cy8c95x0_remove,
 	.id_table	= cy8c95x0_id,
 	.detect		= cy8c95x0_detect,
 };