1 /* 2 * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs 3 * 4 * http://www.active-semi.com/products/power-management-units/act88xx/ 5 * 6 * Copyright (C) 2013 Atmel Corporation 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/init.h> 21 #include <linux/i2c.h> 22 #include <linux/err.h> 23 #include <linux/platform_device.h> 24 #include <linux/regulator/driver.h> 25 #include <linux/regulator/act8865.h> 26 #include <linux/of.h> 27 #include <linux/of_device.h> 28 #include <linux/regulator/of_regulator.h> 29 #include <linux/regmap.h> 30 31 /* 32 * ACT8846 Global Register Map. 33 */ 34 #define ACT8846_SYS0 0x00 35 #define ACT8846_SYS1 0x01 36 #define ACT8846_REG1_VSET 0x10 37 #define ACT8846_REG1_CTRL 0x12 38 #define ACT8846_REG2_VSET0 0x20 39 #define ACT8846_REG2_VSET1 0x21 40 #define ACT8846_REG2_CTRL 0x22 41 #define ACT8846_REG3_VSET0 0x30 42 #define ACT8846_REG3_VSET1 0x31 43 #define ACT8846_REG3_CTRL 0x32 44 #define ACT8846_REG4_VSET0 0x40 45 #define ACT8846_REG4_VSET1 0x41 46 #define ACT8846_REG4_CTRL 0x42 47 #define ACT8846_REG5_VSET 0x50 48 #define ACT8846_REG5_CTRL 0x51 49 #define ACT8846_REG6_VSET 0x58 50 #define ACT8846_REG6_CTRL 0x59 51 #define ACT8846_REG7_VSET 0x60 52 #define ACT8846_REG7_CTRL 0x61 53 #define ACT8846_REG8_VSET 0x68 54 #define ACT8846_REG8_CTRL 0x69 55 #define ACT8846_REG9_VSET 0x70 56 #define ACT8846_REG9_CTRL 0x71 57 #define ACT8846_REG10_VSET 0x80 58 #define ACT8846_REG10_CTRL 0x81 59 #define ACT8846_REG11_VSET 0x90 60 #define ACT8846_REG11_CTRL 0x91 61 #define ACT8846_REG12_VSET 0xa0 62 #define ACT8846_REG12_CTRL 0xa1 63 #define ACT8846_REG13_CTRL 0xb1 64 65 /* 66 * ACT8865 Global Register Map. 67 */ 68 #define ACT8865_SYS_MODE 0x00 69 #define ACT8865_SYS_CTRL 0x01 70 #define ACT8865_DCDC1_VSET1 0x20 71 #define ACT8865_DCDC1_VSET2 0x21 72 #define ACT8865_DCDC1_CTRL 0x22 73 #define ACT8865_DCDC2_VSET1 0x30 74 #define ACT8865_DCDC2_VSET2 0x31 75 #define ACT8865_DCDC2_CTRL 0x32 76 #define ACT8865_DCDC3_VSET1 0x40 77 #define ACT8865_DCDC3_VSET2 0x41 78 #define ACT8865_DCDC3_CTRL 0x42 79 #define ACT8865_LDO1_VSET 0x50 80 #define ACT8865_LDO1_CTRL 0x51 81 #define ACT8865_LDO2_VSET 0x54 82 #define ACT8865_LDO2_CTRL 0x55 83 #define ACT8865_LDO3_VSET 0x60 84 #define ACT8865_LDO3_CTRL 0x61 85 #define ACT8865_LDO4_VSET 0x64 86 #define ACT8865_LDO4_CTRL 0x65 87 88 /* 89 * Field Definitions. 90 */ 91 #define ACT8865_ENA 0x80 /* ON - [7] */ 92 #define ACT8865_VSEL_MASK 0x3F /* VSET - [5:0] */ 93 94 /* 95 * ACT8865 voltage number 96 */ 97 #define ACT8865_VOLTAGE_NUM 64 98 99 struct act8865 { 100 struct regmap *regmap; 101 }; 102 103 static const struct regmap_config act8865_regmap_config = { 104 .reg_bits = 8, 105 .val_bits = 8, 106 }; 107 108 static const struct regulator_linear_range act8865_voltage_ranges[] = { 109 REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000), 110 REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000), 111 REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000), 112 }; 113 114 static struct regulator_ops act8865_ops = { 115 .list_voltage = regulator_list_voltage_linear_range, 116 .map_voltage = regulator_map_voltage_linear_range, 117 .get_voltage_sel = regulator_get_voltage_sel_regmap, 118 .set_voltage_sel = regulator_set_voltage_sel_regmap, 119 .enable = regulator_enable_regmap, 120 .disable = regulator_disable_regmap, 121 .is_enabled = regulator_is_enabled_regmap, 122 }; 123 124 #define ACT88xx_REG(_name, _family, _id, _vsel_reg) \ 125 [_family##_ID_##_id] = { \ 126 .name = _name, \ 127 .id = _family##_ID_##_id, \ 128 .type = REGULATOR_VOLTAGE, \ 129 .ops = &act8865_ops, \ 130 .n_voltages = ACT8865_VOLTAGE_NUM, \ 131 .linear_ranges = act8865_voltage_ranges, \ 132 .n_linear_ranges = ARRAY_SIZE(act8865_voltage_ranges), \ 133 .vsel_reg = _family##_##_id##_##_vsel_reg, \ 134 .vsel_mask = ACT8865_VSEL_MASK, \ 135 .enable_reg = _family##_##_id##_CTRL, \ 136 .enable_mask = ACT8865_ENA, \ 137 .owner = THIS_MODULE, \ 138 } 139 140 static const struct regulator_desc act8846_regulators[] = { 141 ACT88xx_REG("REG1", ACT8846, REG1, VSET), 142 ACT88xx_REG("REG2", ACT8846, REG2, VSET0), 143 ACT88xx_REG("REG3", ACT8846, REG3, VSET0), 144 ACT88xx_REG("REG4", ACT8846, REG4, VSET0), 145 ACT88xx_REG("REG5", ACT8846, REG5, VSET), 146 ACT88xx_REG("REG6", ACT8846, REG6, VSET), 147 ACT88xx_REG("REG7", ACT8846, REG7, VSET), 148 ACT88xx_REG("REG8", ACT8846, REG8, VSET), 149 ACT88xx_REG("REG9", ACT8846, REG9, VSET), 150 ACT88xx_REG("REG10", ACT8846, REG10, VSET), 151 ACT88xx_REG("REG11", ACT8846, REG11, VSET), 152 ACT88xx_REG("REG12", ACT8846, REG12, VSET), 153 }; 154 155 static const struct regulator_desc act8865_regulators[] = { 156 ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1), 157 ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1), 158 ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1), 159 ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET), 160 ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET), 161 ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET), 162 ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET), 163 }; 164 165 #ifdef CONFIG_OF 166 static const struct of_device_id act8865_dt_ids[] = { 167 { .compatible = "active-semi,act8846", .data = (void *)ACT8846 }, 168 { .compatible = "active-semi,act8865", .data = (void *)ACT8865 }, 169 { } 170 }; 171 MODULE_DEVICE_TABLE(of, act8865_dt_ids); 172 173 static struct of_regulator_match act8846_matches[] = { 174 [ACT8846_ID_REG1] = { .name = "REG1" }, 175 [ACT8846_ID_REG2] = { .name = "REG2" }, 176 [ACT8846_ID_REG3] = { .name = "REG3" }, 177 [ACT8846_ID_REG4] = { .name = "REG4" }, 178 [ACT8846_ID_REG5] = { .name = "REG5" }, 179 [ACT8846_ID_REG6] = { .name = "REG6" }, 180 [ACT8846_ID_REG7] = { .name = "REG7" }, 181 [ACT8846_ID_REG8] = { .name = "REG8" }, 182 [ACT8846_ID_REG9] = { .name = "REG9" }, 183 [ACT8846_ID_REG10] = { .name = "REG10" }, 184 [ACT8846_ID_REG11] = { .name = "REG11" }, 185 [ACT8846_ID_REG12] = { .name = "REG12" }, 186 }; 187 188 static struct of_regulator_match act8865_matches[] = { 189 [ACT8865_ID_DCDC1] = { .name = "DCDC_REG1"}, 190 [ACT8865_ID_DCDC2] = { .name = "DCDC_REG2"}, 191 [ACT8865_ID_DCDC3] = { .name = "DCDC_REG3"}, 192 [ACT8865_ID_LDO1] = { .name = "LDO_REG1"}, 193 [ACT8865_ID_LDO2] = { .name = "LDO_REG2"}, 194 [ACT8865_ID_LDO3] = { .name = "LDO_REG3"}, 195 [ACT8865_ID_LDO4] = { .name = "LDO_REG4"}, 196 }; 197 198 static int act8865_pdata_from_dt(struct device *dev, 199 struct device_node **of_node, 200 struct act8865_platform_data *pdata, 201 unsigned long type) 202 { 203 int matched, i, num_matches; 204 struct device_node *np; 205 struct act8865_regulator_data *regulator; 206 struct of_regulator_match *matches; 207 208 np = of_get_child_by_name(dev->of_node, "regulators"); 209 if (!np) { 210 dev_err(dev, "missing 'regulators' subnode in DT\n"); 211 return -EINVAL; 212 } 213 214 switch (type) { 215 case ACT8846: 216 matches = act8846_matches; 217 num_matches = ARRAY_SIZE(act8846_matches); 218 break; 219 case ACT8865: 220 matches = act8865_matches; 221 num_matches = ARRAY_SIZE(act8865_matches); 222 break; 223 default: 224 dev_err(dev, "invalid device id %lu\n", type); 225 return -EINVAL; 226 } 227 228 matched = of_regulator_match(dev, np, matches, num_matches); 229 of_node_put(np); 230 if (matched <= 0) 231 return matched; 232 233 pdata->regulators = devm_kzalloc(dev, 234 sizeof(struct act8865_regulator_data) * 235 num_matches, GFP_KERNEL); 236 if (!pdata->regulators) 237 return -ENOMEM; 238 239 pdata->num_regulators = num_matches; 240 regulator = pdata->regulators; 241 242 for (i = 0; i < num_matches; i++) { 243 regulator->id = i; 244 regulator->name = matches[i].name; 245 regulator->platform_data = matches[i].init_data; 246 of_node[i] = matches[i].of_node; 247 regulator++; 248 } 249 250 return 0; 251 } 252 #else 253 static inline int act8865_pdata_from_dt(struct device *dev, 254 struct device_node **of_node, 255 struct act8865_platform_data *pdata, 256 unsigned long type) 257 { 258 return 0; 259 } 260 #endif 261 262 static struct regulator_init_data 263 *act8865_get_init_data(int id, struct act8865_platform_data *pdata) 264 { 265 int i; 266 267 if (!pdata) 268 return NULL; 269 270 for (i = 0; i < pdata->num_regulators; i++) { 271 if (pdata->regulators[i].id == id) 272 return pdata->regulators[i].platform_data; 273 } 274 275 return NULL; 276 } 277 278 static int act8865_pmic_probe(struct i2c_client *client, 279 const struct i2c_device_id *i2c_id) 280 { 281 static const struct regulator_desc *regulators; 282 struct act8865_platform_data pdata_of, *pdata; 283 struct device *dev = &client->dev; 284 struct device_node **of_node; 285 int i, ret, num_regulators; 286 struct act8865 *act8865; 287 unsigned long type; 288 289 pdata = dev_get_platdata(dev); 290 291 if (dev->of_node && !pdata) { 292 const struct of_device_id *id; 293 294 id = of_match_device(of_match_ptr(act8865_dt_ids), dev); 295 if (!id) 296 return -ENODEV; 297 298 type = (unsigned long) id->data; 299 } else { 300 type = i2c_id->driver_data; 301 } 302 303 switch (type) { 304 case ACT8846: 305 regulators = act8846_regulators; 306 num_regulators = ARRAY_SIZE(act8846_regulators); 307 break; 308 case ACT8865: 309 regulators = act8865_regulators; 310 num_regulators = ARRAY_SIZE(act8865_regulators); 311 break; 312 default: 313 dev_err(dev, "invalid device id %lu\n", type); 314 return -EINVAL; 315 } 316 317 of_node = devm_kzalloc(dev, sizeof(struct device_node *) * 318 num_regulators, GFP_KERNEL); 319 if (!of_node) 320 return -ENOMEM; 321 322 if (dev->of_node && !pdata) { 323 ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, type); 324 if (ret < 0) 325 return ret; 326 327 pdata = &pdata_of; 328 } 329 330 if (pdata->num_regulators > num_regulators) { 331 dev_err(dev, "too many regulators: %d\n", 332 pdata->num_regulators); 333 return -EINVAL; 334 } 335 336 act8865 = devm_kzalloc(dev, sizeof(struct act8865), GFP_KERNEL); 337 if (!act8865) 338 return -ENOMEM; 339 340 act8865->regmap = devm_regmap_init_i2c(client, &act8865_regmap_config); 341 if (IS_ERR(act8865->regmap)) { 342 ret = PTR_ERR(act8865->regmap); 343 dev_err(&client->dev, "Failed to allocate register map: %d\n", 344 ret); 345 return ret; 346 } 347 348 /* Finally register devices */ 349 for (i = 0; i < num_regulators; i++) { 350 const struct regulator_desc *desc = ®ulators[i]; 351 struct regulator_config config = { }; 352 struct regulator_dev *rdev; 353 354 config.dev = dev; 355 config.init_data = act8865_get_init_data(desc->id, pdata); 356 config.of_node = of_node[i]; 357 config.driver_data = act8865; 358 config.regmap = act8865->regmap; 359 360 rdev = devm_regulator_register(&client->dev, desc, &config); 361 if (IS_ERR(rdev)) { 362 dev_err(dev, "failed to register %s\n", desc->name); 363 return PTR_ERR(rdev); 364 } 365 } 366 367 i2c_set_clientdata(client, act8865); 368 devm_kfree(dev, of_node); 369 370 return 0; 371 } 372 373 static const struct i2c_device_id act8865_ids[] = { 374 { .name = "act8846", .driver_data = ACT8846 }, 375 { .name = "act8865", .driver_data = ACT8865 }, 376 { }, 377 }; 378 MODULE_DEVICE_TABLE(i2c, act8865_ids); 379 380 static struct i2c_driver act8865_pmic_driver = { 381 .driver = { 382 .name = "act8865", 383 .owner = THIS_MODULE, 384 }, 385 .probe = act8865_pmic_probe, 386 .id_table = act8865_ids, 387 }; 388 389 module_i2c_driver(act8865_pmic_driver); 390 391 MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver"); 392 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>"); 393 MODULE_LICENSE("GPL v2"); 394