Okan Sahin | c2b2afe | 2023-04-12 14:12:43 +0300 | [diff] [blame] | 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[] = { |
Chen-Yu Tsai | 269cb04b | 2023-07-14 16:14:07 +0800 | [diff] [blame] | 47 | 0x0, 0x0, 0x1, 0x1, 0x2, 0x2, |
Okan Sahin | c2b2afe | 2023-04-12 14:12:43 +0300 | [diff] [blame] | 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, \ |
Chen-Yu Tsai | 269cb04b | 2023-07-14 16:14:07 +0800 | [diff] [blame] | 70 | .linear_range_selectors_bitfield = max77541_buck_volt_range_sel, \ |
Okan Sahin | c2b2afe | 2023-04-12 14:12:43 +0300 | [diff] [blame] | 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, \ |
Chen-Yu Tsai | 269cb04b | 2023-07-14 16:14:07 +0800 | [diff] [blame] | 89 | .linear_range_selectors_bitfield = max77541_buck_volt_range_sel, \ |
Okan Sahin | c2b2afe | 2023-04-12 14:12:43 +0300 | [diff] [blame] | 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"); |