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 13 static 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 22 static 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 34 static 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 46 static const unsigned int max77541_buck_volt_range_sel[] = { 47 0x00, 0x00, 0x40, 0x40, 0x80, 0x80, 48 }; 49 50 enum 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 = 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 = max77541_buck_volt_range_sel, \ 90 .owner = THIS_MODULE, \ 91 } 92 93 static const struct regulator_desc max77540_regulators_desc[] = { 94 MAX77540_BUCK(1, max77541_buck_ops), 95 MAX77540_BUCK(2, max77541_buck_ops), 96 }; 97 98 static const struct regulator_desc max77541_regulators_desc[] = { 99 MAX77541_BUCK(1, max77541_buck_ops), 100 MAX77541_BUCK(2, max77541_buck_ops), 101 }; 102 103 static 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 } 134 135 static const struct platform_device_id max77541_regulator_platform_id[] = { 136 { "max77540-regulator" }, 137 { "max77541-regulator" }, 138 { } 139 }; 140 MODULE_DEVICE_TABLE(platform, max77541_regulator_platform_id); 141 142 static 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 }; 149 module_platform_driver(max77541_regulator_driver); 150 151 MODULE_AUTHOR("Okan Sahin <Okan.Sahin@analog.com>"); 152 MODULE_DESCRIPTION("MAX77540/MAX77541 regulator driver"); 153 MODULE_LICENSE("GPL"); 154