1// SPDX-License-Identifier: GPL-2.0-or-later
  2/*
  3 * Copyright (c) 2022 Analog Devices, Inc.
  4 * ADI Regulator driver for the MAX77540 and MAX77541
  5 */
  6
  7#include <linux/mfd/max77541.h>
  8#include <linux/mod_devicetable.h>
  9#include <linux/platform_device.h>
 10#include <linux/regmap.h>
 11#include <linux/regulator/driver.h>
 12
 13static const struct regulator_ops max77541_buck_ops = {
 14	.enable			= regulator_enable_regmap,
 15	.disable		= regulator_disable_regmap,
 16	.is_enabled		= regulator_is_enabled_regmap,
 17	.list_voltage		= regulator_list_voltage_pickable_linear_range,
 18	.get_voltage_sel	= regulator_get_voltage_sel_pickable_regmap,
 19	.set_voltage_sel	= regulator_set_voltage_sel_pickable_regmap,
 20};
 21
 22static const struct linear_range max77540_buck_ranges[] = {
 23	/* Ranges when VOLT_SEL bits are 0x00 */
 24	REGULATOR_LINEAR_RANGE(500000, 0x00, 0x8B, 5000),
 25	REGULATOR_LINEAR_RANGE(1200000, 0x8C, 0xFF, 0),
 26	/* Ranges when VOLT_SEL bits are 0x40 */
 27	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000),
 28	REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0),
 29	/* Ranges when VOLT_SEL bits are  0x80 */
 30	REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000),
 31	REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0),
 32};
 33
 34static const struct linear_range max77541_buck_ranges[] = {
 35	/* Ranges when VOLT_SEL bits are 0x00 */
 36	REGULATOR_LINEAR_RANGE(300000, 0x00, 0xB3, 5000),
 37	REGULATOR_LINEAR_RANGE(1200000, 0xB4, 0xFF, 0),
 38	/* Ranges when VOLT_SEL bits are 0x40 */
 39	REGULATOR_LINEAR_RANGE(1200000, 0x00, 0x8B, 10000),
 40	REGULATOR_LINEAR_RANGE(2400000, 0x8C, 0xFF, 0),
 41	/* Ranges when VOLT_SEL bits are  0x80 */
 42	REGULATOR_LINEAR_RANGE(2000000, 0x00, 0x9F, 20000),
 43	REGULATOR_LINEAR_RANGE(5200000, 0xA0, 0xFF, 0),
 44};
 45
 46static const unsigned int max77541_buck_volt_range_sel[] = {
 47	0x0, 0x0, 0x1, 0x1, 0x2, 0x2,
 48};
 49
 50enum max77541_regulators {
 51	MAX77541_BUCK1 = 1,
 52	MAX77541_BUCK2,
 53};
 54
 55#define MAX77540_BUCK(_id, _ops)					\
 56	{	.id = MAX77541_BUCK ## _id,				\
 57		.name = "buck"#_id,					\
 58		.of_match = "buck"#_id,					\
 59		.regulators_node = "regulators",			\
 60		.enable_reg = MAX77541_REG_EN_CTRL,			\
 61		.enable_mask = MAX77541_BIT_M ## _id ## _EN,		\
 62		.ops = &(_ops),						\
 63		.type = REGULATOR_VOLTAGE,				\
 64		.linear_ranges = max77540_buck_ranges,			\
 65		.n_linear_ranges = ARRAY_SIZE(max77540_buck_ranges),	\
 66		.vsel_reg = MAX77541_REG_M ## _id ## _VOUT,		\
 67		.vsel_mask = MAX77541_BITS_MX_VOUT,			\
 68		.vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1,	\
 69		.vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG,		\
 70		.linear_range_selectors_bitfield = max77541_buck_volt_range_sel, \
 71		.owner = THIS_MODULE,					\
 72	}
 73
 74#define MAX77541_BUCK(_id, _ops)					\
 75	{	.id = MAX77541_BUCK ## _id,				\
 76		.name = "buck"#_id,					\
 77		.of_match = "buck"#_id,					\
 78		.regulators_node = "regulators",			\
 79		.enable_reg = MAX77541_REG_EN_CTRL,			\
 80		.enable_mask = MAX77541_BIT_M ## _id ## _EN,		\
 81		.ops = &(_ops),						\
 82		.type = REGULATOR_VOLTAGE,				\
 83		.linear_ranges = max77541_buck_ranges,			\
 84		.n_linear_ranges = ARRAY_SIZE(max77541_buck_ranges),	\
 85		.vsel_reg = MAX77541_REG_M ## _id ## _VOUT,		\
 86		.vsel_mask = MAX77541_BITS_MX_VOUT,			\
 87		.vsel_range_reg = MAX77541_REG_M ## _id ## _CFG1,	\
 88		.vsel_range_mask = MAX77541_BITS_MX_CFG1_RNG,		\
 89		.linear_range_selectors_bitfield = max77541_buck_volt_range_sel, \
 90		.owner = THIS_MODULE,					\
 91	}
 92
 93static const struct regulator_desc max77540_regulators_desc[] = {
 94	MAX77540_BUCK(1, max77541_buck_ops),
 95	MAX77540_BUCK(2, max77541_buck_ops),
 96};
 97
 98static const struct regulator_desc max77541_regulators_desc[] = {
 99	MAX77541_BUCK(1, max77541_buck_ops),
100	MAX77541_BUCK(2, max77541_buck_ops),
101};
102
103static int max77541_regulator_probe(struct platform_device *pdev)
104{
105	struct regulator_config config = {};
106	const struct regulator_desc *desc;
107	struct device *dev = &pdev->dev;
108	struct regulator_dev *rdev;
109	struct max77541 *max77541 = dev_get_drvdata(dev->parent);
110	unsigned int i;
111
112	config.dev = dev->parent;
113
114	switch (max77541->id) {
115	case MAX77540:
116		desc = max77540_regulators_desc;
117		break;
118	case MAX77541:
119		desc = max77541_regulators_desc;
120		break;
121	default:
122		return -EINVAL;
123	}
124
125	for (i = 0; i < MAX77541_MAX_REGULATORS; i++) {
126		rdev = devm_regulator_register(dev, &desc[i], &config);
127		if (IS_ERR(rdev))
128			return dev_err_probe(dev, PTR_ERR(rdev),
129					     "Failed to register regulator\n");
130	}
131
132	return 0;
133}
134
135static const struct platform_device_id max77541_regulator_platform_id[] = {
136	{ "max77540-regulator" },
137	{ "max77541-regulator" },
138	{ }
139};
140MODULE_DEVICE_TABLE(platform, max77541_regulator_platform_id);
141
142static struct platform_driver max77541_regulator_driver = {
143	.driver = {
144		.name = "max77541-regulator",
145	},
146	.probe = max77541_regulator_probe,
147	.id_table = max77541_regulator_platform_id,
148};
149module_platform_driver(max77541_regulator_driver);
150
151MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>");
152MODULE_DESCRIPTION("MAX77540/MAX77541 regulator driver");
153MODULE_LICENSE("GPL");