projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 33036f48 WY |
1 | /* |
| 2 | * act8865-regulator.c - Voltage regulation for the active-semi ACT8865 | |
| 3 | * http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf | |
| 4 | * | |
| 5 | * Copyright (C) 2013 Atmel Corporation | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify | |
| 8 | * it under the terms of the GNU General Public License as published by | |
| 9 | * the Free Software Foundation; either version 2 of the License, or | |
| 10 | * (at your option) any later version. | |
| 11 | * | |
| 12 | * This program is distributed in the hope that it will be useful, | |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 15 | * GNU General Public License for more details. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/module.h> | |
| 19 | #include <linux/init.h> | |
| 20 | #include <linux/i2c.h> | |
| 21 | #include <linux/err.h> | |
| 22 | #include <linux/platform_device.h> | |
| 23 | #include <linux/regulator/driver.h> | |
| 24 | #include <linux/regulator/act8865.h> | |
| 25 | #include <linux/of.h> | |
| 26 | #include <linux/of_device.h> | |
| 27 | #include <linux/regulator/of_regulator.h> | |
| 28 | #include <linux/regmap.h> | |
| 29 | ||
| 30 | /* | |
| 31 | * ACT8865 Global Register Map. | |
| 32 | */ | |
| 33 | #define ACT8865_SYS_MODE 0x00 | |
| 34 | #define ACT8865_SYS_CTRL 0x01 | |
| 35 | #define ACT8865_DCDC1_VSET1 0x20 | |
| 36 | #define ACT8865_DCDC1_VSET2 0x21 | |
| 37 | #define ACT8865_DCDC1_CTRL 0x22 | |
| 38 | #define ACT8865_DCDC2_VSET1 0x30 | |
| 39 | #define ACT8865_DCDC2_VSET2 0x31 | |
| 40 | #define ACT8865_DCDC2_CTRL 0x32 | |
| 41 | #define ACT8865_DCDC3_VSET1 0x40 | |
| 42 | #define ACT8865_DCDC3_VSET2 0x41 | |
| 43 | #define ACT8865_DCDC3_CTRL 0x42 | |
| 44 | #define ACT8865_LDO1_VSET 0x50 | |
| 45 | #define ACT8865_LDO1_CTRL 0x51 | |
| 46 | #define ACT8865_LDO2_VSET 0x54 | |
| 47 | #define ACT8865_LDO2_CTRL 0x55 | |
| 48 | #define ACT8865_LDO3_VSET 0x60 | |
| 49 | #define ACT8865_LDO3_CTRL 0x61 | |
| 50 | #define ACT8865_LDO4_VSET 0x64 | |
| 51 | #define ACT8865_LDO4_CTRL 0x65 | |
| 52 | ||
| 53 | /* | |
| 54 | * Field Definitions. | |
| 55 | */ | |
| 56 | #define ACT8865_ENA 0x80 /* ON - [7] */ | |
| 57 | #define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */ | |
| 58 | ||
| 59 | /* | |
| 60 | * ACT8865 voltage number | |
| 61 | */ | |
| 62 | #define ACT8865_VOLTAGE_NUM 64 | |
| 63 | ||
| 64 | struct act8865 { | |
| 65 | struct regulator_dev *rdev[ACT8865_REG_NUM]; | |
| 66 | struct regmap *regmap; | |
| 67 | }; | |
| 68 | ||
| 69 | static const struct regmap_config act8865_regmap_config = { | |
| 70 | .reg_bits = 8, | |
| 71 | .val_bits = 8, | |
| 72 | }; | |
| 73 | ||
| 74 | static const struct regulator_linear_range act8865_volatge_ranges[] = { | |
| 75 | REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), | |
| 76 | REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), | |
| 77 | REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), | |
| 78 | }; | |
| 79 | ||
| 80 | static struct regulator_ops act8865_ops = { | |
| 81 | .list_voltage = regulator_list_voltage_linear_range, | |
| 82 | .map_voltage = regulator_map_voltage_linear_range, | |
| 83 | .get_voltage_sel = regulator_get_voltage_sel_regmap, | |
| 84 | .set_voltage_sel = regulator_set_voltage_sel_regmap, | |
| 85 | .enable = regulator_enable_regmap, | |
| 86 | .disable = regulator_disable_regmap, | |
| 87 | .is_enabled = regulator_is_enabled_regmap, | |
| 88 | .set_suspend_enable = regulator_enable_regmap, | |
| 89 | .set_suspend_disable = regulator_disable_regmap, | |
| 90 | }; | |
| 91 | ||
| 92 | static const struct regulator_desc act8865_reg[] = { | |
| 93 | { | |
| 94 | .name = "DCDC_REG1", | |
| 95 | .id = ACT8865_ID_DCDC1, | |
| 96 | .ops = &act8865_ops, | |
| 97 | .type = REGULATOR_VOLTAGE, | |
| 98 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 99 | .linear_ranges = act8865_volatge_ranges, | |
| 100 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 101 | .vsel_reg = ACT8865_DCDC1_VSET1, | |
| 102 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 103 | .enable_reg = ACT8865_DCDC1_CTRL, | |
| 104 | .enable_mask = ACT8865_ENA, | |
| 105 | .owner = THIS_MODULE, | |
| 106 | }, | |
| 107 | { | |
| 108 | .name = "DCDC_REG2", | |
| 109 | .id = ACT8865_ID_DCDC2, | |
| 110 | .ops = &act8865_ops, | |
| 111 | .type = REGULATOR_VOLTAGE, | |
| 112 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 113 | .linear_ranges = act8865_volatge_ranges, | |
| 114 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 115 | .vsel_reg = ACT8865_DCDC2_VSET1, | |
| 116 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 117 | .enable_reg = ACT8865_DCDC2_CTRL, | |
| 118 | .enable_mask = ACT8865_ENA, | |
| 119 | .owner = THIS_MODULE, | |
| 120 | }, | |
| 121 | { | |
| 122 | .name = "DCDC_REG3", | |
| 123 | .id = ACT8865_ID_DCDC3, | |
| 124 | .ops = &act8865_ops, | |
| 125 | .type = REGULATOR_VOLTAGE, | |
| 126 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 127 | .linear_ranges = act8865_volatge_ranges, | |
| 128 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 129 | .vsel_reg = ACT8865_DCDC3_VSET1, | |
| 130 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 131 | .enable_reg = ACT8865_DCDC3_CTRL, | |
| 132 | .enable_mask = ACT8865_ENA, | |
| 133 | .owner = THIS_MODULE, | |
| 134 | }, | |
| 135 | { | |
| 136 | .name = "LDO_REG1", | |
| 137 | .id = ACT8865_ID_LDO1, | |
| 138 | .ops = &act8865_ops, | |
| 139 | .type = REGULATOR_VOLTAGE, | |
| 140 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 141 | .linear_ranges = act8865_volatge_ranges, | |
| 142 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 143 | .vsel_reg = ACT8865_LDO1_VSET, | |
| 144 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 145 | .enable_reg = ACT8865_LDO1_CTRL, | |
| 146 | .enable_mask = ACT8865_ENA, | |
| 147 | .owner = THIS_MODULE, | |
| 148 | }, | |
| 149 | { | |
| 150 | .name = "LDO_REG2", | |
| 151 | .id = ACT8865_ID_LDO2, | |
| 152 | .ops = &act8865_ops, | |
| 153 | .type = REGULATOR_VOLTAGE, | |
| 154 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 155 | .linear_ranges = act8865_volatge_ranges, | |
| 156 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 157 | .vsel_reg = ACT8865_LDO2_VSET, | |
| 158 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 159 | .enable_reg = ACT8865_LDO2_CTRL, | |
| 160 | .enable_mask = ACT8865_ENA, | |
| 161 | .owner = THIS_MODULE, | |
| 162 | }, | |
| 163 | { | |
| 164 | .name = "LDO_REG3", | |
| 165 | .id = ACT8865_ID_LDO3, | |
| 166 | .ops = &act8865_ops, | |
| 167 | .type = REGULATOR_VOLTAGE, | |
| 168 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 169 | .linear_ranges = act8865_volatge_ranges, | |
| 170 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 171 | .vsel_reg = ACT8865_LDO3_VSET, | |
| 172 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 173 | .enable_reg = ACT8865_LDO3_CTRL, | |
| 174 | .enable_mask = ACT8865_ENA, | |
| 175 | .owner = THIS_MODULE, | |
| 176 | }, | |
| 177 | { | |
| 178 | .name = "LDO_REG4", | |
| 179 | .id = ACT8865_ID_LDO4, | |
| 180 | .ops = &act8865_ops, | |
| 181 | .type = REGULATOR_VOLTAGE, | |
| 182 | .n_voltages = ACT8865_VOLTAGE_NUM, | |
| 183 | .linear_ranges = act8865_volatge_ranges, | |
| 184 | .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges), | |
| 185 | .vsel_reg = ACT8865_LDO4_VSET, | |
| 186 | .vsel_mask = ACT8865_VSEL_MASK, | |
| 187 | .enable_reg = ACT8865_LDO4_CTRL, | |
| 188 | .enable_mask = ACT8865_ENA, | |
| 189 | .owner = THIS_MODULE, | |
| 190 | }, | |
| 191 | }; | |
| 192 | ||
| 193 | #ifdef CONFIG_OF | |
| 194 | static const struct of_device_id act8865_dt_ids[] = { | |
| 195 | { .compatible = "active-semi,act8865" }, | |
| 196 | { } | |
| 197 | }; | |
| 198 | MODULE_DEVICE_TABLE(of, act8865_dt_ids); | |
| 199 | ||
| 200 | static struct of_regulator_match act8865_matches[] = { | |
| 201 | [ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"}, | |
| 202 | [ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"}, | |
| 203 | [ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"}, | |
| 204 | [ACT8865_ID_LDO1] = { .name = "LDO_REG1"}, | |
| 205 | [ACT8865_ID_LDO2] = { .name = "LDO_REG2"}, | |
| 206 | [ACT8865_ID_LDO3] = { .name = "LDO_REG3"}, | |
| 207 | [ACT8865_ID_LDO4] = { .name = "LDO_REG4"}, | |
| 208 | }; | |
| 209 | ||
| 210 | static int act8865_pdata_from_dt(struct device *dev, | |
| 211 | struct device_node **of_node, | |
| 212 | struct act8865_platform_data *pdata) | |
| 213 | { | |
| 214 | int matched, i; | |
| 215 | struct device_node *np; | |
| 216 | struct act8865_regulator_data *regulator; | |
| 217 | ||
| 218 | np = of_find_node_by_name(dev->of_node, "regulators"); | |
| 219 | if (!np) { | |
| 220 | dev_err(dev, "missing 'regulators' subnode in DT\n"); | |
| 221 | return -EINVAL; | |
| 222 | } | |
| 223 | ||
| 224 | matched = of_regulator_match(dev, np, | |
| 225 | act8865_matches, ARRAY_SIZE(act8865_matches)); | |
| 226 | if (matched <= 0) | |
| 227 | return matched; | |
| 228 | ||
| 229 | pdata->regulators = devm_kzalloc(dev, | |
| 230 | sizeof(struct act8865_regulator_data) * matched, | |
| 231 | GFP_KERNEL); | |
| 232 | if (!pdata->regulators) { | |
| 233 | dev_err(dev, "%s: failed to allocate act8865 registor\n", | |
| 234 | __func__); | |
| 235 | return -ENOMEM; | |
| 236 | } | |
| 237 | ||
| 238 | pdata->num_regulators = matched; | |
| 239 | regulator = pdata->regulators; | |
| 240 | ||
| 241 | for (i = 0; i < matched; i++) { | |
| 242 | if (!act8865_matches[i].init_data) | |
| 243 | continue; | |
| 244 | ||
| 245 | regulator->id = i; | |
| 246 | regulator->name = act8865_matches[i].name; | |
| 247 | regulator->platform_data = act8865_matches[i].init_data; | |
| 248 | of_node[i] = act8865_matches[i].of_node; | |
| 249 | regulator++; | |
| 250 | } | |
| 251 | ||
| 252 | return 0; | |
| 253 | } | |
| 254 | #else | |
| 255 | static inline int act8865_pdata_from_dt(struct device *dev, | |
| 256 | struct device_node **of_node, | |
| 257 | struct act8865_platform_data *pdata) | |
| 258 | { | |
| 259 | return 0; | |
| 260 | } | |
| 261 | #endif | |
| 262 | ||
| 263 | static int act8865_pmic_probe(struct i2c_client *client, | |
| 264 | const struct i2c_device_id *i2c_id) | |
| 265 | { | |
| 266 | struct regulator_dev **rdev; | |
| 267 | struct device *dev = &client->dev; | |
| 268 | struct act8865_platform_data *pdata = dev_get_platdata(dev); | |
| 269 | struct regulator_config config = { }; | |
| 270 | struct act8865 *act8865; | |
| 271 | struct device_node *of_node[ACT8865_REG_NUM]; | |
| 272 | int i, id; | |
| 273 | int ret = -EINVAL; | |
| 274 | int error; | |
| 275 | ||
| 276 | if (dev->of_node && !pdata) { | |
| 277 | const struct of_device_id *id; | |
| 278 | struct act8865_platform_data pdata_of; | |
| 279 | ||
| 280 | id = of_match_device(of_match_ptr(act8865_dt_ids), dev); | |
| 281 | if (!id) | |
| 282 | return -ENODEV; | |
| 283 | ||
| 284 | ret = act8865_pdata_from_dt(dev, of_node, &pdata_of); | |
| 285 | if (ret < 0) | |
| 286 | return ret; | |
| 287 | ||
| 288 | pdata = &pdata_of; | |
| 289 | } | |
| 290 | ||
| 291 | if (pdata->num_regulators > ACT8865_REG_NUM) { | |
| 292 | dev_err(dev, "Too many regulators found!\n"); | |
| 293 | return -EINVAL; | |
| 294 | } | |
| 295 | ||
| 296 | act8865 = devm_kzalloc(dev, sizeof(struct act8865) + | |
| 297 | sizeof(struct regulator_dev *) * ACT8865_REG_NUM, | |
| 298 | GFP_KERNEL); | |
| 299 | if (!act8865) | |
| 300 | return -ENOMEM; | |
| 301 | ||
| 302 | rdev = act8865->rdev; | |
| 303 | ||
| 304 | act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config); | |
| 305 | if (IS_ERR(act8865->regmap)) { | |
| 306 | error = PTR_ERR(act8865->regmap); | |
| 307 | dev_err(&client->dev, "Failed to allocate register map: %d\n", | |
| 308 | error); | |
| 309 | return error; | |
| 310 | } | |
| 311 | ||
| 312 | /* Finally register devices */ | |
| 313 | for (i = 0; i < pdata->num_regulators; i++) { | |
| 314 | ||
| 315 | id = pdata->regulators[i].id; | |
| 316 | ||
| 317 | config.dev = dev; | |
| 318 | config.init_data = pdata->regulators[i].platform_data; | |
| 319 | config.of_node = of_node[i]; | |
| 320 | config.driver_data = act8865; | |
| 321 | config.regmap = act8865->regmap; | |
| 322 | ||
| 323 | rdev[i] = devm_regulator_register(&client->dev, | |
| 324 | &act8865_reg[i], &config); | |
| 325 | if (IS_ERR(rdev[i])) { | |
| 326 | dev_err(dev, "failed to register %s\n", | |
| 327 | act8865_reg[id].name); | |
| 328 | return PTR_ERR(rdev[i]); | |
| 329 | } | |
| 330 | } | |
| 331 | ||
| 332 | i2c_set_clientdata(client, act8865); | |
| 333 | ||
| 334 | return 0; | |
| 335 | } | |
| 336 | ||
| 337 | static int act8865_pmic_remove(struct i2c_client *client) | |
| 338 | { | |
| 339 | struct act8865 *act8865 = i2c_get_clientdata(client); | |
| 340 | int i; | |
| 341 | ||
| 342 | for (i = 0; i < ACT8865_REG_NUM; i++) | |
| 343 | regulator_unregister(act8865->rdev[i]); | |
| 344 | ||
| 345 | return 0; | |
| 346 | } | |
| 347 | ||
| 348 | static const struct i2c_device_id act8865_ids[] = { | |
| 349 | { "act8865", 0 }, | |
| 350 | { }, | |
| 351 | }; | |
| 352 | MODULE_DEVICE_TABLE(i2c, act8865_ids); | |
| 353 | ||
| 354 | static struct i2c_driver act8865_pmic_driver = { | |
| 355 | .driver = { | |
| 356 | .name = "act8865", | |
| 357 | .owner = THIS_MODULE, | |
| 358 | }, | |
| 359 | .probe = act8865_pmic_probe, | |
| 360 | .remove = act8865_pmic_remove, | |
| 361 | .id_table = act8865_ids, | |
| 362 | }; | |
| 363 | ||
| 364 | module_i2c_driver(act8865_pmic_driver); | |
| 365 | ||
| 366 | MODULE_DESCRIPTION("active-semi act8865 voltage regulator driver"); | |
| 367 | MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); | |
| 368 | MODULE_LICENSE("GPL v2"); |