only for test

Author: joan-na-good

drivers/regulator/Makefile

@@ -203,4 +203,6 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
 obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_WM8994) += wm8994-regulator.o
 
+obj-y += max77675-regulator.o
+
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG

drivers/regulator/max77675-regulator.c

@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2025 Analog Devices, Inc.
+ * ADI regulator driver for MAX77675.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/regulator/driver.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+
+#define MAX77675_NUM_REGULATORS 4
+
+struct max77675_regulator {
+	struct device *dev;
+	struct regulator_dev *rdev[MAX77675_NUM_REGULATORS];
+	struct regmap *regmap;
+};
+
+static const struct regulator_ops max77675_regulator_ops = {
+	.enable     = regulator_enable_regmap,
+	.disable    = regulator_disable_regmap,
+	.is_enabled = regulator_is_enabled_regmap,
+	.set_voltage_sel = regulator_set_voltage_sel_regmap,
+	.get_voltage_sel = regulator_get_voltage_sel_regmap,
+};
+
+static const struct regulator_desc max77675_regulators[] = {
+	{
+		.name = "simo0",
+		.id = 0,
+		.ops = &max77675_regulator_ops,
+		.type = REGULATOR_VOLTAGE,
+		.owner = THIS_MODULE,
+		.n_voltages = 64,
+		.min_uV = 500000,
+		.uV_step = 50000,
+		.vsel_reg = 0x10,   // example value : SIMO0 VOUT
+		.vsel_mask = 0x3F,
+		.enable_reg = 0x20, // example value :  SIMO0 ENABLE
+		.enable_mask = 0x01,
+	},
+};
+
+static int max77675_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+	struct max77675_regulator *priv;
+	int i, ret;
+
+	priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, priv);
+
+	priv->regmap = devm_regmap_init_i2c(client, &some_regmap_config);
+	if (IS_ERR(priv->regmap))
+		return dev_err_probe(&client->dev, PTR_ERR(priv->regmap), "regmap init failed");
+
+	for (i = 0; i < MAX77675_NUM_REGULATORS; i++) {
+		struct regulator_config config = {};
+		config.dev = &client->dev;
+		config.regmap = priv->regmap;
+
+		priv->rdev[i] = devm_regulator_register(&client->dev,
+				&max77675_regulators[i], &config);
+		if (IS_ERR(priv->rdev[i])) {
+			dev_err(&client->dev, "Failed to register regulator %d\n", i);
+			return PTR_ERR(priv->rdev[i]);
+		}
+	}
+
+	dev_info(&client->dev, "MAX77675 regulator driver loaded\n");
+	return 0;
+}
+
+static const struct of_device_id max77675_of_match[] = {
+	{ .compatible = "maxim,max77675", },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, max77675_of_match);
+
+static const struct i2c_device_id max77675_id[] = {
+	{ "max77675", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, max77675_id);
+
+static struct i2c_driver max77675_driver = {
+	.driver = {
+		.name = "max77675",
+		.of_match_table = max77675_of_match,
+	},
+	.probe = max77675_probe,
+	.id_table = max77675_id,
+};
+
+module_i2c_driver(max77675_driver);
+
+MODULE_AUTHOR("joan.na@analog.com");
+MODULE_DESCRIPTION("MAX77675 Regulator Driver");
+MODULE_LICENSE("GPL");
+