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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (c) 2022 Analog Devices, Inc.4 * ADI Regulator driver for the MAX77540 and MAX775415 */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");154