Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | // |
| 3 | // mp5416.c - regulator driver for mps mp5416 |
| 4 | // |
| 5 | // Copyright 2020 Monolithic Power Systems, Inc |
| 6 | // |
| 7 | // Author: Saravanan Sekar <sravanhome@gmail.com> |
| 8 | |
Robert Marko | b9dea01 | 2022-06-04 16:58:14 +0200 | [diff] [blame] | 9 | #include <linux/err.h> |
| 10 | #include <linux/i2c.h> |
| 11 | #include <linux/init.h> |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 12 | #include <linux/module.h> |
Rob Herring | 045a44d | 2023-07-14 11:49:28 -0600 | [diff] [blame] | 13 | #include <linux/of.h> |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 14 | #include <linux/platform_device.h> |
| 15 | #include <linux/regmap.h> |
| 16 | #include <linux/regulator/driver.h> |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 17 | |
| 18 | #define MP5416_REG_CTL0 0x00 |
| 19 | #define MP5416_REG_CTL1 0x01 |
| 20 | #define MP5416_REG_CTL2 0x02 |
| 21 | #define MP5416_REG_ILIM 0x03 |
| 22 | #define MP5416_REG_BUCK1 0x04 |
| 23 | #define MP5416_REG_BUCK2 0x05 |
| 24 | #define MP5416_REG_BUCK3 0x06 |
| 25 | #define MP5416_REG_BUCK4 0x07 |
| 26 | #define MP5416_REG_LDO1 0x08 |
| 27 | #define MP5416_REG_LDO2 0x09 |
| 28 | #define MP5416_REG_LDO3 0x0a |
| 29 | #define MP5416_REG_LDO4 0x0b |
| 30 | |
| 31 | #define MP5416_REGULATOR_EN BIT(7) |
| 32 | #define MP5416_MASK_VSET 0x7f |
| 33 | #define MP5416_MASK_BUCK1_ILIM 0xc0 |
| 34 | #define MP5416_MASK_BUCK2_ILIM 0x0c |
| 35 | #define MP5416_MASK_BUCK3_ILIM 0x30 |
| 36 | #define MP5416_MASK_BUCK4_ILIM 0x03 |
| 37 | #define MP5416_MASK_DVS_SLEWRATE 0xc0 |
| 38 | |
| 39 | /* values in uV */ |
| 40 | #define MP5416_VOLT1_MIN 600000 |
| 41 | #define MP5416_VOLT1_MAX 2187500 |
| 42 | #define MP5416_VOLT1_STEP 12500 |
| 43 | #define MP5416_VOLT2_MIN 800000 |
| 44 | #define MP5416_VOLT2_MAX 3975000 |
| 45 | #define MP5416_VOLT2_STEP 25000 |
| 46 | |
| 47 | #define MP5416_VOLT1_RANGE \ |
| 48 | ((MP5416_VOLT1_MAX - MP5416_VOLT1_MIN)/MP5416_VOLT1_STEP + 1) |
| 49 | #define MP5416_VOLT2_RANGE \ |
| 50 | ((MP5416_VOLT2_MAX - MP5416_VOLT2_MIN)/MP5416_VOLT2_STEP + 1) |
| 51 | |
| 52 | #define MP5416BUCK(_name, _id, _ilim, _dreg, _dval, _vsel) \ |
| 53 | [MP5416_BUCK ## _id] = { \ |
| 54 | .id = MP5416_BUCK ## _id, \ |
| 55 | .name = _name, \ |
| 56 | .of_match = _name, \ |
| 57 | .regulators_node = "regulators", \ |
| 58 | .ops = &mp5416_buck_ops, \ |
| 59 | .min_uV = MP5416_VOLT ##_vsel## _MIN, \ |
| 60 | .uV_step = MP5416_VOLT ##_vsel## _STEP, \ |
| 61 | .n_voltages = MP5416_VOLT ##_vsel## _RANGE, \ |
| 62 | .curr_table = _ilim, \ |
| 63 | .n_current_limits = ARRAY_SIZE(_ilim), \ |
| 64 | .csel_reg = MP5416_REG_ILIM, \ |
| 65 | .csel_mask = MP5416_MASK_BUCK ## _id ##_ILIM, \ |
| 66 | .vsel_reg = MP5416_REG_BUCK ## _id, \ |
| 67 | .vsel_mask = MP5416_MASK_VSET, \ |
| 68 | .enable_reg = MP5416_REG_BUCK ## _id, \ |
| 69 | .enable_mask = MP5416_REGULATOR_EN, \ |
Axel Lin | 15413ce | 2021-05-22 10:30:18 +0800 | [diff] [blame] | 70 | .ramp_reg = MP5416_REG_CTL2, \ |
| 71 | .ramp_mask = MP5416_MASK_DVS_SLEWRATE, \ |
| 72 | .ramp_delay_table = mp5416_buck_ramp_table, \ |
| 73 | .n_ramp_values = ARRAY_SIZE(mp5416_buck_ramp_table), \ |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 74 | .active_discharge_on = _dval, \ |
| 75 | .active_discharge_reg = _dreg, \ |
| 76 | .active_discharge_mask = _dval, \ |
| 77 | .owner = THIS_MODULE, \ |
| 78 | } |
| 79 | |
Axel Lin | 502cdd6 | 2020-02-12 23:02:23 +0800 | [diff] [blame] | 80 | #define MP5416LDO(_name, _id, _dval) \ |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 81 | [MP5416_LDO ## _id] = { \ |
| 82 | .id = MP5416_LDO ## _id, \ |
| 83 | .name = _name, \ |
| 84 | .of_match = _name, \ |
| 85 | .regulators_node = "regulators", \ |
| 86 | .ops = &mp5416_ldo_ops, \ |
| 87 | .min_uV = MP5416_VOLT2_MIN, \ |
| 88 | .uV_step = MP5416_VOLT2_STEP, \ |
| 89 | .n_voltages = MP5416_VOLT2_RANGE, \ |
| 90 | .vsel_reg = MP5416_REG_LDO ##_id, \ |
| 91 | .vsel_mask = MP5416_MASK_VSET, \ |
| 92 | .enable_reg = MP5416_REG_LDO ##_id, \ |
| 93 | .enable_mask = MP5416_REGULATOR_EN, \ |
Axel Lin | 502cdd6 | 2020-02-12 23:02:23 +0800 | [diff] [blame] | 94 | .active_discharge_on = _dval, \ |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 95 | .active_discharge_reg = MP5416_REG_CTL2, \ |
Axel Lin | 502cdd6 | 2020-02-12 23:02:23 +0800 | [diff] [blame] | 96 | .active_discharge_mask = _dval, \ |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 97 | .owner = THIS_MODULE, \ |
| 98 | } |
| 99 | |
| 100 | enum mp5416_regulators { |
| 101 | MP5416_BUCK1, |
| 102 | MP5416_BUCK2, |
| 103 | MP5416_BUCK3, |
| 104 | MP5416_BUCK4, |
| 105 | MP5416_LDO1, |
| 106 | MP5416_LDO2, |
| 107 | MP5416_LDO3, |
| 108 | MP5416_LDO4, |
| 109 | MP5416_MAX_REGULATORS, |
| 110 | }; |
| 111 | |
| 112 | static const struct regmap_config mp5416_regmap_config = { |
| 113 | .reg_bits = 8, |
| 114 | .val_bits = 8, |
| 115 | .max_register = 0x0d, |
| 116 | }; |
| 117 | |
| 118 | /* Current limits array (in uA) |
| 119 | * ILIM1 & ILIM3 |
| 120 | */ |
| 121 | static const unsigned int mp5416_I_limits1[] = { |
| 122 | 3800000, 4600000, 5600000, 6800000 |
| 123 | }; |
| 124 | |
| 125 | /* ILIM2 & ILIM4 */ |
| 126 | static const unsigned int mp5416_I_limits2[] = { |
| 127 | 2200000, 3200000, 4200000, 5200000 |
| 128 | }; |
| 129 | |
Axel Lin | 15413ce | 2021-05-22 10:30:18 +0800 | [diff] [blame] | 130 | /* |
| 131 | * DVS ramp rate BUCK1 to BUCK4 |
| 132 | * 00: 32mV/us |
| 133 | * 01: 16mV/us |
| 134 | * 10: 8mV/us |
| 135 | * 11: 4mV/us |
| 136 | */ |
| 137 | static const unsigned int mp5416_buck_ramp_table[] = { |
| 138 | 32000, 16000, 8000, 4000 |
| 139 | }; |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 140 | |
| 141 | static const struct regulator_ops mp5416_ldo_ops = { |
| 142 | .enable = regulator_enable_regmap, |
| 143 | .disable = regulator_disable_regmap, |
| 144 | .is_enabled = regulator_is_enabled_regmap, |
| 145 | .list_voltage = regulator_list_voltage_linear, |
| 146 | .map_voltage = regulator_map_voltage_linear, |
| 147 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| 148 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| 149 | .set_active_discharge = regulator_set_active_discharge_regmap, |
| 150 | }; |
| 151 | |
| 152 | static const struct regulator_ops mp5416_buck_ops = { |
| 153 | .enable = regulator_enable_regmap, |
| 154 | .disable = regulator_disable_regmap, |
| 155 | .is_enabled = regulator_is_enabled_regmap, |
| 156 | .list_voltage = regulator_list_voltage_linear, |
| 157 | .map_voltage = regulator_map_voltage_linear, |
| 158 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| 159 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| 160 | .set_active_discharge = regulator_set_active_discharge_regmap, |
| 161 | .get_current_limit = regulator_get_current_limit_regmap, |
| 162 | .set_current_limit = regulator_set_current_limit_regmap, |
Axel Lin | 15413ce | 2021-05-22 10:30:18 +0800 | [diff] [blame] | 163 | .set_ramp_delay = regulator_set_ramp_delay_regmap, |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 164 | }; |
| 165 | |
| 166 | static struct regulator_desc mp5416_regulators_desc[MP5416_MAX_REGULATORS] = { |
| 167 | MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1), |
| 168 | MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 2), |
| 169 | MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1), |
| 170 | MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 2), |
Axel Lin | 502cdd6 | 2020-02-12 23:02:23 +0800 | [diff] [blame] | 171 | MP5416LDO("ldo1", 1, BIT(4)), |
| 172 | MP5416LDO("ldo2", 2, BIT(3)), |
| 173 | MP5416LDO("ldo3", 3, BIT(2)), |
| 174 | MP5416LDO("ldo4", 4, BIT(1)), |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 175 | }; |
| 176 | |
Robert Marko | fcdaf74 | 2022-06-04 16:58:16 +0200 | [diff] [blame] | 177 | static struct regulator_desc mp5496_regulators_desc[MP5416_MAX_REGULATORS] = { |
| 178 | MP5416BUCK("buck1", 1, mp5416_I_limits1, MP5416_REG_CTL1, BIT(0), 1), |
| 179 | MP5416BUCK("buck2", 2, mp5416_I_limits2, MP5416_REG_CTL1, BIT(1), 1), |
| 180 | MP5416BUCK("buck3", 3, mp5416_I_limits1, MP5416_REG_CTL1, BIT(2), 1), |
| 181 | MP5416BUCK("buck4", 4, mp5416_I_limits2, MP5416_REG_CTL2, BIT(5), 1), |
| 182 | MP5416LDO("ldo1", 1, BIT(4)), |
| 183 | MP5416LDO("ldo2", 2, BIT(3)), |
| 184 | MP5416LDO("ldo3", 3, BIT(2)), |
| 185 | MP5416LDO("ldo4", 4, BIT(1)), |
| 186 | }; |
| 187 | |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 188 | static int mp5416_i2c_probe(struct i2c_client *client) |
| 189 | { |
| 190 | struct device *dev = &client->dev; |
| 191 | struct regulator_config config = { NULL, }; |
Robert Marko | df43c24 | 2022-06-04 16:58:15 +0200 | [diff] [blame] | 192 | static const struct regulator_desc *desc; |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 193 | struct regulator_dev *rdev; |
| 194 | struct regmap *regmap; |
| 195 | int i; |
| 196 | |
| 197 | regmap = devm_regmap_init_i2c(client, &mp5416_regmap_config); |
| 198 | if (IS_ERR(regmap)) { |
| 199 | dev_err(dev, "Failed to allocate regmap!\n"); |
| 200 | return PTR_ERR(regmap); |
| 201 | } |
| 202 | |
Robert Marko | df43c24 | 2022-06-04 16:58:15 +0200 | [diff] [blame] | 203 | desc = of_device_get_match_data(dev); |
| 204 | if (!desc) |
| 205 | return -ENODEV; |
| 206 | |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 207 | config.dev = dev; |
| 208 | config.regmap = regmap; |
| 209 | |
| 210 | for (i = 0; i < MP5416_MAX_REGULATORS; i++) { |
| 211 | rdev = devm_regulator_register(dev, |
Robert Marko | df43c24 | 2022-06-04 16:58:15 +0200 | [diff] [blame] | 212 | &desc[i], |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 213 | &config); |
| 214 | if (IS_ERR(rdev)) { |
| 215 | dev_err(dev, "Failed to register regulator!\n"); |
| 216 | return PTR_ERR(rdev); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | static const struct of_device_id mp5416_of_match[] = { |
Robert Marko | df43c24 | 2022-06-04 16:58:15 +0200 | [diff] [blame] | 224 | { .compatible = "mps,mp5416", .data = &mp5416_regulators_desc }, |
Robert Marko | fcdaf74 | 2022-06-04 16:58:16 +0200 | [diff] [blame] | 225 | { .compatible = "mps,mp5496", .data = &mp5496_regulators_desc }, |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 226 | {}, |
| 227 | }; |
| 228 | MODULE_DEVICE_TABLE(of, mp5416_of_match); |
| 229 | |
| 230 | static const struct i2c_device_id mp5416_id[] = { |
| 231 | { "mp5416", }, |
Robert Marko | fcdaf74 | 2022-06-04 16:58:16 +0200 | [diff] [blame] | 232 | { "mp5496", }, |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 233 | { }, |
| 234 | }; |
| 235 | MODULE_DEVICE_TABLE(i2c, mp5416_id); |
| 236 | |
| 237 | static struct i2c_driver mp5416_regulator_driver = { |
| 238 | .driver = { |
| 239 | .name = "mp5416", |
Douglas Anderson | 67dc71c | 2023-03-16 12:54:41 -0700 | [diff] [blame] | 240 | .probe_type = PROBE_PREFER_ASYNCHRONOUS, |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 241 | .of_match_table = of_match_ptr(mp5416_of_match), |
| 242 | }, |
Uwe Kleine-König | 964e186 | 2023-05-06 00:02:18 +0200 | [diff] [blame] | 243 | .probe = mp5416_i2c_probe, |
Saravanan Sekar | a273188 | 2020-02-04 12:04:18 +0100 | [diff] [blame] | 244 | .id_table = mp5416_id, |
| 245 | }; |
| 246 | module_i2c_driver(mp5416_regulator_driver); |
| 247 | |
| 248 | MODULE_AUTHOR("Saravanan Sekar <sravanhome@gmail.com>"); |
| 249 | MODULE_DESCRIPTION("MP5416 PMIC regulator driver"); |
| 250 | MODULE_LICENSE("GPL"); |