1 /* 2 * Voltage regulator support for AMS AS3722 PMIC 3 * 4 * Copyright (C) 2013 ams 5 * 6 * Author: Florian Lobmaier <florian.lobmaier@ams.com> 7 * Author: Laxman Dewangan <ldewangan@nvidia.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 */ 24 25 #include <linux/err.h> 26 #include <linux/kernel.h> 27 #include <linux/module.h> 28 #include <linux/mfd/as3722.h> 29 #include <linux/of.h> 30 #include <linux/of_platform.h> 31 #include <linux/platform_device.h> 32 #include <linux/regulator/driver.h> 33 #include <linux/regulator/machine.h> 34 #include <linux/regulator/of_regulator.h> 35 #include <linux/slab.h> 36 37 /* Regulator IDs */ 38 enum as3722_regulators_id { 39 AS3722_REGULATOR_ID_SD0, 40 AS3722_REGULATOR_ID_SD1, 41 AS3722_REGULATOR_ID_SD2, 42 AS3722_REGULATOR_ID_SD3, 43 AS3722_REGULATOR_ID_SD4, 44 AS3722_REGULATOR_ID_SD5, 45 AS3722_REGULATOR_ID_SD6, 46 AS3722_REGULATOR_ID_LDO0, 47 AS3722_REGULATOR_ID_LDO1, 48 AS3722_REGULATOR_ID_LDO2, 49 AS3722_REGULATOR_ID_LDO3, 50 AS3722_REGULATOR_ID_LDO4, 51 AS3722_REGULATOR_ID_LDO5, 52 AS3722_REGULATOR_ID_LDO6, 53 AS3722_REGULATOR_ID_LDO7, 54 AS3722_REGULATOR_ID_LDO9, 55 AS3722_REGULATOR_ID_LDO10, 56 AS3722_REGULATOR_ID_LDO11, 57 AS3722_REGULATOR_ID_MAX, 58 }; 59 60 struct as3722_register_mapping { 61 u8 regulator_id; 62 const char *name; 63 const char *sname; 64 u8 vsel_reg; 65 u8 vsel_mask; 66 int n_voltages; 67 u32 enable_reg; 68 u8 enable_mask; 69 u32 control_reg; 70 u8 mode_mask; 71 u32 sleep_ctrl_reg; 72 u8 sleep_ctrl_mask; 73 }; 74 75 struct as3722_regulator_config_data { 76 struct regulator_init_data *reg_init; 77 bool enable_tracking; 78 int ext_control; 79 }; 80 81 struct as3722_regulators { 82 struct device *dev; 83 struct as3722 *as3722; 84 struct regulator_dev *rdevs[AS3722_REGULATOR_ID_MAX]; 85 struct regulator_desc desc[AS3722_REGULATOR_ID_MAX]; 86 struct as3722_regulator_config_data 87 reg_config_data[AS3722_REGULATOR_ID_MAX]; 88 }; 89 90 static const struct as3722_register_mapping as3722_reg_lookup[] = { 91 { 92 .regulator_id = AS3722_REGULATOR_ID_SD0, 93 .name = "as3722-sd0", 94 .vsel_reg = AS3722_SD0_VOLTAGE_REG, 95 .vsel_mask = AS3722_SD_VSEL_MASK, 96 .enable_reg = AS3722_SD_CONTROL_REG, 97 .enable_mask = AS3722_SDn_CTRL(0), 98 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 99 .sleep_ctrl_mask = AS3722_SD0_EXT_ENABLE_MASK, 100 .control_reg = AS3722_SD0_CONTROL_REG, 101 .mode_mask = AS3722_SD0_MODE_FAST, 102 }, 103 { 104 .regulator_id = AS3722_REGULATOR_ID_SD1, 105 .name = "as3722-sd1", 106 .vsel_reg = AS3722_SD1_VOLTAGE_REG, 107 .vsel_mask = AS3722_SD_VSEL_MASK, 108 .enable_reg = AS3722_SD_CONTROL_REG, 109 .enable_mask = AS3722_SDn_CTRL(1), 110 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 111 .sleep_ctrl_mask = AS3722_SD1_EXT_ENABLE_MASK, 112 .control_reg = AS3722_SD1_CONTROL_REG, 113 .mode_mask = AS3722_SD1_MODE_FAST, 114 }, 115 { 116 .regulator_id = AS3722_REGULATOR_ID_SD2, 117 .name = "as3722-sd2", 118 .sname = "vsup-sd2", 119 .vsel_reg = AS3722_SD2_VOLTAGE_REG, 120 .vsel_mask = AS3722_SD_VSEL_MASK, 121 .enable_reg = AS3722_SD_CONTROL_REG, 122 .enable_mask = AS3722_SDn_CTRL(2), 123 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 124 .sleep_ctrl_mask = AS3722_SD2_EXT_ENABLE_MASK, 125 .control_reg = AS3722_SD23_CONTROL_REG, 126 .mode_mask = AS3722_SD2_MODE_FAST, 127 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 128 }, 129 { 130 .regulator_id = AS3722_REGULATOR_ID_SD3, 131 .name = "as3722-sd3", 132 .sname = "vsup-sd3", 133 .vsel_reg = AS3722_SD3_VOLTAGE_REG, 134 .vsel_mask = AS3722_SD_VSEL_MASK, 135 .enable_reg = AS3722_SD_CONTROL_REG, 136 .enable_mask = AS3722_SDn_CTRL(3), 137 .sleep_ctrl_reg = AS3722_ENABLE_CTRL1_REG, 138 .sleep_ctrl_mask = AS3722_SD3_EXT_ENABLE_MASK, 139 .control_reg = AS3722_SD23_CONTROL_REG, 140 .mode_mask = AS3722_SD3_MODE_FAST, 141 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 142 }, 143 { 144 .regulator_id = AS3722_REGULATOR_ID_SD4, 145 .name = "as3722-sd4", 146 .sname = "vsup-sd4", 147 .vsel_reg = AS3722_SD4_VOLTAGE_REG, 148 .vsel_mask = AS3722_SD_VSEL_MASK, 149 .enable_reg = AS3722_SD_CONTROL_REG, 150 .enable_mask = AS3722_SDn_CTRL(4), 151 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG, 152 .sleep_ctrl_mask = AS3722_SD4_EXT_ENABLE_MASK, 153 .control_reg = AS3722_SD4_CONTROL_REG, 154 .mode_mask = AS3722_SD4_MODE_FAST, 155 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 156 }, 157 { 158 .regulator_id = AS3722_REGULATOR_ID_SD5, 159 .name = "as3722-sd5", 160 .sname = "vsup-sd5", 161 .vsel_reg = AS3722_SD5_VOLTAGE_REG, 162 .vsel_mask = AS3722_SD_VSEL_MASK, 163 .enable_reg = AS3722_SD_CONTROL_REG, 164 .enable_mask = AS3722_SDn_CTRL(5), 165 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG, 166 .sleep_ctrl_mask = AS3722_SD5_EXT_ENABLE_MASK, 167 .control_reg = AS3722_SD5_CONTROL_REG, 168 .mode_mask = AS3722_SD5_MODE_FAST, 169 .n_voltages = AS3722_SD2_VSEL_MAX + 1, 170 }, 171 { 172 .regulator_id = AS3722_REGULATOR_ID_SD6, 173 .name = "as3722-sd6", 174 .vsel_reg = AS3722_SD6_VOLTAGE_REG, 175 .vsel_mask = AS3722_SD_VSEL_MASK, 176 .enable_reg = AS3722_SD_CONTROL_REG, 177 .enable_mask = AS3722_SDn_CTRL(6), 178 .sleep_ctrl_reg = AS3722_ENABLE_CTRL2_REG, 179 .sleep_ctrl_mask = AS3722_SD6_EXT_ENABLE_MASK, 180 .control_reg = AS3722_SD6_CONTROL_REG, 181 .mode_mask = AS3722_SD6_MODE_FAST, 182 }, 183 { 184 .regulator_id = AS3722_REGULATOR_ID_LDO0, 185 .name = "as3722-ldo0", 186 .sname = "vin-ldo0", 187 .vsel_reg = AS3722_LDO0_VOLTAGE_REG, 188 .vsel_mask = AS3722_LDO0_VSEL_MASK, 189 .enable_reg = AS3722_LDOCONTROL0_REG, 190 .enable_mask = AS3722_LDO0_CTRL, 191 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 192 .sleep_ctrl_mask = AS3722_LDO0_EXT_ENABLE_MASK, 193 .n_voltages = AS3722_LDO0_NUM_VOLT, 194 }, 195 { 196 .regulator_id = AS3722_REGULATOR_ID_LDO1, 197 .name = "as3722-ldo1", 198 .sname = "vin-ldo1-6", 199 .vsel_reg = AS3722_LDO1_VOLTAGE_REG, 200 .vsel_mask = AS3722_LDO_VSEL_MASK, 201 .enable_reg = AS3722_LDOCONTROL0_REG, 202 .enable_mask = AS3722_LDO1_CTRL, 203 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 204 .sleep_ctrl_mask = AS3722_LDO1_EXT_ENABLE_MASK, 205 .n_voltages = AS3722_LDO_NUM_VOLT, 206 }, 207 { 208 .regulator_id = AS3722_REGULATOR_ID_LDO2, 209 .name = "as3722-ldo2", 210 .sname = "vin-ldo2-5-7", 211 .vsel_reg = AS3722_LDO2_VOLTAGE_REG, 212 .vsel_mask = AS3722_LDO_VSEL_MASK, 213 .enable_reg = AS3722_LDOCONTROL0_REG, 214 .enable_mask = AS3722_LDO2_CTRL, 215 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 216 .sleep_ctrl_mask = AS3722_LDO2_EXT_ENABLE_MASK, 217 .n_voltages = AS3722_LDO_NUM_VOLT, 218 }, 219 { 220 .regulator_id = AS3722_REGULATOR_ID_LDO3, 221 .name = "as3722-ldo3", 222 .name = "vin-ldo3-4", 223 .vsel_reg = AS3722_LDO3_VOLTAGE_REG, 224 .vsel_mask = AS3722_LDO3_VSEL_MASK, 225 .enable_reg = AS3722_LDOCONTROL0_REG, 226 .enable_mask = AS3722_LDO3_CTRL, 227 .sleep_ctrl_reg = AS3722_ENABLE_CTRL3_REG, 228 .sleep_ctrl_mask = AS3722_LDO3_EXT_ENABLE_MASK, 229 .n_voltages = AS3722_LDO3_NUM_VOLT, 230 }, 231 { 232 .regulator_id = AS3722_REGULATOR_ID_LDO4, 233 .name = "as3722-ldo4", 234 .name = "vin-ldo3-4", 235 .vsel_reg = AS3722_LDO4_VOLTAGE_REG, 236 .vsel_mask = AS3722_LDO_VSEL_MASK, 237 .enable_reg = AS3722_LDOCONTROL0_REG, 238 .enable_mask = AS3722_LDO4_CTRL, 239 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 240 .sleep_ctrl_mask = AS3722_LDO4_EXT_ENABLE_MASK, 241 .n_voltages = AS3722_LDO_NUM_VOLT, 242 }, 243 { 244 .regulator_id = AS3722_REGULATOR_ID_LDO5, 245 .name = "as3722-ldo5", 246 .sname = "vin-ldo2-5-7", 247 .vsel_reg = AS3722_LDO5_VOLTAGE_REG, 248 .vsel_mask = AS3722_LDO_VSEL_MASK, 249 .enable_reg = AS3722_LDOCONTROL0_REG, 250 .enable_mask = AS3722_LDO5_CTRL, 251 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 252 .sleep_ctrl_mask = AS3722_LDO5_EXT_ENABLE_MASK, 253 .n_voltages = AS3722_LDO_NUM_VOLT, 254 }, 255 { 256 .regulator_id = AS3722_REGULATOR_ID_LDO6, 257 .name = "as3722-ldo6", 258 .sname = "vin-ldo1-6", 259 .vsel_reg = AS3722_LDO6_VOLTAGE_REG, 260 .vsel_mask = AS3722_LDO_VSEL_MASK, 261 .enable_reg = AS3722_LDOCONTROL0_REG, 262 .enable_mask = AS3722_LDO6_CTRL, 263 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 264 .sleep_ctrl_mask = AS3722_LDO6_EXT_ENABLE_MASK, 265 .n_voltages = AS3722_LDO_NUM_VOLT, 266 }, 267 { 268 .regulator_id = AS3722_REGULATOR_ID_LDO7, 269 .name = "as3722-ldo7", 270 .sname = "vin-ldo2-5-7", 271 .vsel_reg = AS3722_LDO7_VOLTAGE_REG, 272 .vsel_mask = AS3722_LDO_VSEL_MASK, 273 .enable_reg = AS3722_LDOCONTROL0_REG, 274 .enable_mask = AS3722_LDO7_CTRL, 275 .sleep_ctrl_reg = AS3722_ENABLE_CTRL4_REG, 276 .sleep_ctrl_mask = AS3722_LDO7_EXT_ENABLE_MASK, 277 .n_voltages = AS3722_LDO_NUM_VOLT, 278 }, 279 { 280 .regulator_id = AS3722_REGULATOR_ID_LDO9, 281 .name = "as3722-ldo9", 282 .sname = "vin-ldo9-10", 283 .vsel_reg = AS3722_LDO9_VOLTAGE_REG, 284 .vsel_mask = AS3722_LDO_VSEL_MASK, 285 .enable_reg = AS3722_LDOCONTROL1_REG, 286 .enable_mask = AS3722_LDO9_CTRL, 287 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG, 288 .sleep_ctrl_mask = AS3722_LDO9_EXT_ENABLE_MASK, 289 .n_voltages = AS3722_LDO_NUM_VOLT, 290 }, 291 { 292 .regulator_id = AS3722_REGULATOR_ID_LDO10, 293 .name = "as3722-ldo10", 294 .sname = "vin-ldo9-10", 295 .vsel_reg = AS3722_LDO10_VOLTAGE_REG, 296 .vsel_mask = AS3722_LDO_VSEL_MASK, 297 .enable_reg = AS3722_LDOCONTROL1_REG, 298 .enable_mask = AS3722_LDO10_CTRL, 299 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG, 300 .sleep_ctrl_mask = AS3722_LDO10_EXT_ENABLE_MASK, 301 .n_voltages = AS3722_LDO_NUM_VOLT, 302 }, 303 { 304 .regulator_id = AS3722_REGULATOR_ID_LDO11, 305 .name = "as3722-ldo11", 306 .sname = "vin-ldo11", 307 .vsel_reg = AS3722_LDO11_VOLTAGE_REG, 308 .vsel_mask = AS3722_LDO_VSEL_MASK, 309 .enable_reg = AS3722_LDOCONTROL1_REG, 310 .enable_mask = AS3722_LDO11_CTRL, 311 .sleep_ctrl_reg = AS3722_ENABLE_CTRL5_REG, 312 .sleep_ctrl_mask = AS3722_LDO11_EXT_ENABLE_MASK, 313 .n_voltages = AS3722_LDO_NUM_VOLT, 314 }, 315 }; 316 317 318 static const int as3722_ldo_current[] = { 150000, 300000 }; 319 static const int as3722_sd016_current[] = { 2500000, 3000000, 3500000 }; 320 321 static int as3722_current_to_index(int min_uA, int max_uA, 322 const int *curr_table, int n_currents) 323 { 324 int i; 325 326 for (i = n_currents - 1; i >= 0; i--) { 327 if ((min_uA <= curr_table[i]) && (curr_table[i] <= max_uA)) 328 return i; 329 } 330 return -EINVAL; 331 } 332 333 static int as3722_ldo_get_current_limit(struct regulator_dev *rdev) 334 { 335 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 336 struct as3722 *as3722 = as3722_regs->as3722; 337 int id = rdev_get_id(rdev); 338 u32 val; 339 int ret; 340 341 ret = as3722_read(as3722, as3722_reg_lookup[id].vsel_reg, &val); 342 if (ret < 0) { 343 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 344 as3722_reg_lookup[id].vsel_reg, ret); 345 return ret; 346 } 347 if (val & AS3722_LDO_ILIMIT_MASK) 348 return 300000; 349 return 150000; 350 } 351 352 static int as3722_ldo_set_current_limit(struct regulator_dev *rdev, 353 int min_uA, int max_uA) 354 { 355 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 356 struct as3722 *as3722 = as3722_regs->as3722; 357 int id = rdev_get_id(rdev); 358 int ret; 359 u32 reg = 0; 360 361 ret = as3722_current_to_index(min_uA, max_uA, as3722_ldo_current, 362 ARRAY_SIZE(as3722_ldo_current)); 363 if (ret < 0) { 364 dev_err(as3722_regs->dev, 365 "Current range min:max = %d:%d does not support\n", 366 min_uA, max_uA); 367 return ret; 368 } 369 if (ret) 370 reg = AS3722_LDO_ILIMIT_BIT; 371 return as3722_update_bits(as3722, as3722_reg_lookup[id].vsel_reg, 372 AS3722_LDO_ILIMIT_MASK, reg); 373 } 374 375 static struct regulator_ops as3722_ldo0_ops = { 376 .is_enabled = regulator_is_enabled_regmap, 377 .enable = regulator_enable_regmap, 378 .disable = regulator_disable_regmap, 379 .list_voltage = regulator_list_voltage_linear, 380 .get_voltage_sel = regulator_get_voltage_sel_regmap, 381 .set_voltage_sel = regulator_set_voltage_sel_regmap, 382 .get_current_limit = as3722_ldo_get_current_limit, 383 .set_current_limit = as3722_ldo_set_current_limit, 384 }; 385 386 static struct regulator_ops as3722_ldo0_extcntrl_ops = { 387 .list_voltage = regulator_list_voltage_linear, 388 .get_voltage_sel = regulator_get_voltage_sel_regmap, 389 .set_voltage_sel = regulator_set_voltage_sel_regmap, 390 .get_current_limit = as3722_ldo_get_current_limit, 391 .set_current_limit = as3722_ldo_set_current_limit, 392 }; 393 394 static int as3722_ldo3_set_tracking_mode(struct as3722_regulators *as3722_reg, 395 int id, u8 mode) 396 { 397 struct as3722 *as3722 = as3722_reg->as3722; 398 399 switch (mode) { 400 case AS3722_LDO3_MODE_PMOS: 401 case AS3722_LDO3_MODE_PMOS_TRACKING: 402 case AS3722_LDO3_MODE_NMOS: 403 case AS3722_LDO3_MODE_SWITCH: 404 return as3722_update_bits(as3722, 405 as3722_reg_lookup[id].vsel_reg, 406 AS3722_LDO3_MODE_MASK, mode); 407 408 default: 409 return -EINVAL; 410 } 411 } 412 413 static int as3722_ldo3_get_current_limit(struct regulator_dev *rdev) 414 { 415 return 150000; 416 } 417 418 static struct regulator_ops as3722_ldo3_ops = { 419 .is_enabled = regulator_is_enabled_regmap, 420 .enable = regulator_enable_regmap, 421 .disable = regulator_disable_regmap, 422 .list_voltage = regulator_list_voltage_linear, 423 .get_voltage_sel = regulator_get_voltage_sel_regmap, 424 .set_voltage_sel = regulator_set_voltage_sel_regmap, 425 .get_current_limit = as3722_ldo3_get_current_limit, 426 }; 427 428 static struct regulator_ops as3722_ldo3_extcntrl_ops = { 429 .list_voltage = regulator_list_voltage_linear, 430 .get_voltage_sel = regulator_get_voltage_sel_regmap, 431 .set_voltage_sel = regulator_set_voltage_sel_regmap, 432 .get_current_limit = as3722_ldo3_get_current_limit, 433 }; 434 435 static const struct regulator_linear_range as3722_ldo_ranges[] = { 436 REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000), 437 REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000), 438 }; 439 440 static struct regulator_ops as3722_ldo_ops = { 441 .is_enabled = regulator_is_enabled_regmap, 442 .enable = regulator_enable_regmap, 443 .disable = regulator_disable_regmap, 444 .map_voltage = regulator_map_voltage_linear_range, 445 .set_voltage_sel = regulator_set_voltage_sel_regmap, 446 .get_voltage_sel = regulator_get_voltage_sel_regmap, 447 .list_voltage = regulator_list_voltage_linear_range, 448 .get_current_limit = as3722_ldo_get_current_limit, 449 .set_current_limit = as3722_ldo_set_current_limit, 450 }; 451 452 static struct regulator_ops as3722_ldo_extcntrl_ops = { 453 .map_voltage = regulator_map_voltage_linear_range, 454 .set_voltage_sel = regulator_set_voltage_sel_regmap, 455 .get_voltage_sel = regulator_get_voltage_sel_regmap, 456 .list_voltage = regulator_list_voltage_linear_range, 457 .get_current_limit = as3722_ldo_get_current_limit, 458 .set_current_limit = as3722_ldo_set_current_limit, 459 }; 460 461 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev) 462 { 463 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 464 struct as3722 *as3722 = as3722_regs->as3722; 465 int id = rdev_get_id(rdev); 466 u32 val; 467 int ret; 468 469 if (!as3722_reg_lookup[id].control_reg) 470 return -ENOTSUPP; 471 472 ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val); 473 if (ret < 0) { 474 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 475 as3722_reg_lookup[id].control_reg, ret); 476 return ret; 477 } 478 479 if (val & as3722_reg_lookup[id].mode_mask) 480 return REGULATOR_MODE_FAST; 481 else 482 return REGULATOR_MODE_NORMAL; 483 } 484 485 static int as3722_sd_set_mode(struct regulator_dev *rdev, 486 unsigned int mode) 487 { 488 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 489 struct as3722 *as3722 = as3722_regs->as3722; 490 u8 id = rdev_get_id(rdev); 491 u8 val = 0; 492 int ret; 493 494 if (!as3722_reg_lookup[id].control_reg) 495 return -ERANGE; 496 497 switch (mode) { 498 case REGULATOR_MODE_FAST: 499 val = as3722_reg_lookup[id].mode_mask; 500 case REGULATOR_MODE_NORMAL: /* fall down */ 501 break; 502 default: 503 return -EINVAL; 504 } 505 506 ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg, 507 as3722_reg_lookup[id].mode_mask, val); 508 if (ret < 0) { 509 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n", 510 as3722_reg_lookup[id].control_reg, ret); 511 return ret; 512 } 513 return ret; 514 } 515 516 static int as3722_sd016_get_current_limit(struct regulator_dev *rdev) 517 { 518 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 519 struct as3722 *as3722 = as3722_regs->as3722; 520 int id = rdev_get_id(rdev); 521 u32 val, reg; 522 int mask; 523 int ret; 524 525 switch (id) { 526 case AS3722_REGULATOR_ID_SD0: 527 reg = AS3722_OVCURRENT_REG; 528 mask = AS3722_OVCURRENT_SD0_TRIP_MASK; 529 break; 530 case AS3722_REGULATOR_ID_SD1: 531 reg = AS3722_OVCURRENT_REG; 532 mask = AS3722_OVCURRENT_SD1_TRIP_MASK; 533 break; 534 case AS3722_REGULATOR_ID_SD6: 535 reg = AS3722_OVCURRENT_DEB_REG; 536 mask = AS3722_OVCURRENT_SD6_TRIP_MASK; 537 break; 538 default: 539 return -EINVAL; 540 } 541 ret = as3722_read(as3722, reg, &val); 542 if (ret < 0) { 543 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 544 reg, ret); 545 return ret; 546 } 547 val &= mask; 548 val >>= ffs(mask) - 1; 549 if (val == 3) 550 return -EINVAL; 551 return as3722_sd016_current[val]; 552 } 553 554 static int as3722_sd016_set_current_limit(struct regulator_dev *rdev, 555 int min_uA, int max_uA) 556 { 557 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 558 struct as3722 *as3722 = as3722_regs->as3722; 559 int id = rdev_get_id(rdev); 560 int ret; 561 int val; 562 int mask; 563 u32 reg; 564 565 ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current, 566 ARRAY_SIZE(as3722_sd016_current)); 567 if (ret < 0) { 568 dev_err(as3722_regs->dev, 569 "Current range min:max = %d:%d does not support\n", 570 min_uA, max_uA); 571 return ret; 572 } 573 574 switch (id) { 575 case AS3722_REGULATOR_ID_SD0: 576 reg = AS3722_OVCURRENT_REG; 577 mask = AS3722_OVCURRENT_SD0_TRIP_MASK; 578 break; 579 case AS3722_REGULATOR_ID_SD1: 580 reg = AS3722_OVCURRENT_REG; 581 mask = AS3722_OVCURRENT_SD1_TRIP_MASK; 582 break; 583 case AS3722_REGULATOR_ID_SD6: 584 reg = AS3722_OVCURRENT_DEB_REG; 585 mask = AS3722_OVCURRENT_SD6_TRIP_MASK; 586 break; 587 default: 588 return -EINVAL; 589 } 590 ret <<= ffs(mask) - 1; 591 val = ret & mask; 592 return as3722_update_bits(as3722, reg, mask, val); 593 } 594 595 static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs) 596 { 597 int err; 598 unsigned val; 599 600 err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val); 601 if (err < 0) { 602 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 603 AS3722_FUSE7_REG, err); 604 return false; 605 } 606 if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE) 607 return true; 608 return false; 609 } 610 611 static const struct regulator_linear_range as3722_sd2345_ranges[] = { 612 REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500), 613 REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000), 614 REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000), 615 }; 616 617 static struct regulator_ops as3722_sd016_ops = { 618 .is_enabled = regulator_is_enabled_regmap, 619 .enable = regulator_enable_regmap, 620 .disable = regulator_disable_regmap, 621 .list_voltage = regulator_list_voltage_linear, 622 .map_voltage = regulator_map_voltage_linear, 623 .get_voltage_sel = regulator_get_voltage_sel_regmap, 624 .set_voltage_sel = regulator_set_voltage_sel_regmap, 625 .get_current_limit = as3722_sd016_get_current_limit, 626 .set_current_limit = as3722_sd016_set_current_limit, 627 .get_mode = as3722_sd_get_mode, 628 .set_mode = as3722_sd_set_mode, 629 }; 630 631 static struct regulator_ops as3722_sd016_extcntrl_ops = { 632 .list_voltage = regulator_list_voltage_linear, 633 .map_voltage = regulator_map_voltage_linear, 634 .get_voltage_sel = regulator_get_voltage_sel_regmap, 635 .set_voltage_sel = regulator_set_voltage_sel_regmap, 636 .get_current_limit = as3722_sd016_get_current_limit, 637 .set_current_limit = as3722_sd016_set_current_limit, 638 .get_mode = as3722_sd_get_mode, 639 .set_mode = as3722_sd_set_mode, 640 }; 641 642 static struct regulator_ops as3722_sd2345_ops = { 643 .is_enabled = regulator_is_enabled_regmap, 644 .enable = regulator_enable_regmap, 645 .disable = regulator_disable_regmap, 646 .list_voltage = regulator_list_voltage_linear_range, 647 .map_voltage = regulator_map_voltage_linear_range, 648 .set_voltage_sel = regulator_set_voltage_sel_regmap, 649 .get_voltage_sel = regulator_get_voltage_sel_regmap, 650 .get_mode = as3722_sd_get_mode, 651 .set_mode = as3722_sd_set_mode, 652 }; 653 654 static struct regulator_ops as3722_sd2345_extcntrl_ops = { 655 .list_voltage = regulator_list_voltage_linear_range, 656 .map_voltage = regulator_map_voltage_linear_range, 657 .set_voltage_sel = regulator_set_voltage_sel_regmap, 658 .get_voltage_sel = regulator_get_voltage_sel_regmap, 659 .get_mode = as3722_sd_get_mode, 660 .set_mode = as3722_sd_set_mode, 661 }; 662 663 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id, 664 int ext_pwr_ctrl) 665 { 666 int ret; 667 unsigned int val; 668 669 if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) || 670 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3)) 671 return -EINVAL; 672 673 val = ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1); 674 ret = as3722_update_bits(as3722_regs->as3722, 675 as3722_reg_lookup[id].sleep_ctrl_reg, 676 as3722_reg_lookup[id].sleep_ctrl_mask, val); 677 if (ret < 0) 678 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n", 679 as3722_reg_lookup[id].sleep_ctrl_reg, ret); 680 return ret; 681 } 682 683 static struct of_regulator_match as3722_regulator_matches[] = { 684 { .name = "sd0", }, 685 { .name = "sd1", }, 686 { .name = "sd2", }, 687 { .name = "sd3", }, 688 { .name = "sd4", }, 689 { .name = "sd5", }, 690 { .name = "sd6", }, 691 { .name = "ldo0", }, 692 { .name = "ldo1", }, 693 { .name = "ldo2", }, 694 { .name = "ldo3", }, 695 { .name = "ldo4", }, 696 { .name = "ldo5", }, 697 { .name = "ldo6", }, 698 { .name = "ldo7", }, 699 { .name = "ldo9", }, 700 { .name = "ldo10", }, 701 { .name = "ldo11", }, 702 }; 703 704 static int as3722_get_regulator_dt_data(struct platform_device *pdev, 705 struct as3722_regulators *as3722_regs) 706 { 707 struct device_node *np; 708 struct as3722_regulator_config_data *reg_config; 709 u32 prop; 710 int id; 711 int ret; 712 713 np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); 714 if (!np) { 715 dev_err(&pdev->dev, "Device is not having regulators node\n"); 716 return -ENODEV; 717 } 718 pdev->dev.of_node = np; 719 720 ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches, 721 ARRAY_SIZE(as3722_regulator_matches)); 722 of_node_put(np); 723 if (ret < 0) { 724 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n", 725 ret); 726 return ret; 727 } 728 729 for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) { 730 struct device_node *reg_node; 731 732 reg_config = &as3722_regs->reg_config_data[id]; 733 reg_config->reg_init = as3722_regulator_matches[id].init_data; 734 reg_node = as3722_regulator_matches[id].of_node; 735 736 if (!reg_config->reg_init || !reg_node) 737 continue; 738 739 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop); 740 if (!ret) { 741 if (prop < 3) 742 reg_config->ext_control = prop; 743 else 744 dev_warn(&pdev->dev, 745 "ext-control have invalid option: %u\n", 746 prop); 747 } 748 reg_config->enable_tracking = 749 of_property_read_bool(reg_node, "ams,enable-tracking"); 750 } 751 return 0; 752 } 753 754 static int as3722_regulator_probe(struct platform_device *pdev) 755 { 756 struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent); 757 struct as3722_regulators *as3722_regs; 758 struct as3722_regulator_config_data *reg_config; 759 struct regulator_dev *rdev; 760 struct regulator_config config = { }; 761 struct regulator_ops *ops; 762 int id; 763 int ret; 764 765 as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs), 766 GFP_KERNEL); 767 if (!as3722_regs) 768 return -ENOMEM; 769 770 as3722_regs->dev = &pdev->dev; 771 as3722_regs->as3722 = as3722; 772 platform_set_drvdata(pdev, as3722_regs); 773 774 ret = as3722_get_regulator_dt_data(pdev, as3722_regs); 775 if (ret < 0) 776 return ret; 777 778 config.dev = &pdev->dev; 779 config.driver_data = as3722_regs; 780 config.regmap = as3722->regmap; 781 782 for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) { 783 reg_config = &as3722_regs->reg_config_data[id]; 784 785 as3722_regs->desc[id].name = as3722_reg_lookup[id].name; 786 as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname; 787 as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id; 788 as3722_regs->desc[id].n_voltages = 789 as3722_reg_lookup[id].n_voltages; 790 as3722_regs->desc[id].type = REGULATOR_VOLTAGE; 791 as3722_regs->desc[id].owner = THIS_MODULE; 792 as3722_regs->desc[id].enable_reg = 793 as3722_reg_lookup[id].enable_reg; 794 as3722_regs->desc[id].enable_mask = 795 as3722_reg_lookup[id].enable_mask; 796 as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg; 797 as3722_regs->desc[id].vsel_mask = 798 as3722_reg_lookup[id].vsel_mask; 799 switch (id) { 800 case AS3722_REGULATOR_ID_LDO0: 801 if (reg_config->ext_control) 802 ops = &as3722_ldo0_extcntrl_ops; 803 else 804 ops = &as3722_ldo0_ops; 805 as3722_regs->desc[id].min_uV = 825000; 806 as3722_regs->desc[id].uV_step = 25000; 807 as3722_regs->desc[id].linear_min_sel = 1; 808 as3722_regs->desc[id].enable_time = 500; 809 break; 810 case AS3722_REGULATOR_ID_LDO3: 811 if (reg_config->ext_control) 812 ops = &as3722_ldo3_extcntrl_ops; 813 else 814 ops = &as3722_ldo3_ops; 815 as3722_regs->desc[id].min_uV = 620000; 816 as3722_regs->desc[id].uV_step = 20000; 817 as3722_regs->desc[id].linear_min_sel = 1; 818 as3722_regs->desc[id].enable_time = 500; 819 if (reg_config->enable_tracking) { 820 ret = as3722_ldo3_set_tracking_mode(as3722_regs, 821 id, AS3722_LDO3_MODE_PMOS_TRACKING); 822 if (ret < 0) { 823 dev_err(&pdev->dev, 824 "LDO3 tracking failed: %d\n", 825 ret); 826 return ret; 827 } 828 } 829 break; 830 case AS3722_REGULATOR_ID_SD0: 831 case AS3722_REGULATOR_ID_SD1: 832 case AS3722_REGULATOR_ID_SD6: 833 if (reg_config->ext_control) 834 ops = &as3722_sd016_extcntrl_ops; 835 else 836 ops = &as3722_sd016_ops; 837 if (id == AS3722_REGULATOR_ID_SD0 && 838 as3722_sd0_is_low_voltage(as3722_regs)) { 839 as3722_regs->desc[id].n_voltages = 840 AS3722_SD0_VSEL_LOW_VOL_MAX + 1; 841 as3722_regs->desc[id].min_uV = 410000; 842 } else { 843 as3722_regs->desc[id].n_voltages = 844 AS3722_SD0_VSEL_MAX + 1, 845 as3722_regs->desc[id].min_uV = 610000; 846 } 847 as3722_regs->desc[id].uV_step = 10000; 848 as3722_regs->desc[id].linear_min_sel = 1; 849 as3722_regs->desc[id].enable_time = 600; 850 break; 851 case AS3722_REGULATOR_ID_SD2: 852 case AS3722_REGULATOR_ID_SD3: 853 case AS3722_REGULATOR_ID_SD4: 854 case AS3722_REGULATOR_ID_SD5: 855 if (reg_config->ext_control) 856 ops = &as3722_sd2345_extcntrl_ops; 857 else 858 ops = &as3722_sd2345_ops; 859 as3722_regs->desc[id].linear_ranges = 860 as3722_sd2345_ranges; 861 as3722_regs->desc[id].n_linear_ranges = 862 ARRAY_SIZE(as3722_sd2345_ranges); 863 break; 864 default: 865 if (reg_config->ext_control) 866 ops = &as3722_ldo_extcntrl_ops; 867 else 868 ops = &as3722_ldo_ops; 869 as3722_regs->desc[id].enable_time = 500; 870 as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges; 871 as3722_regs->desc[id].n_linear_ranges = 872 ARRAY_SIZE(as3722_ldo_ranges); 873 break; 874 } 875 as3722_regs->desc[id].ops = ops; 876 config.init_data = reg_config->reg_init; 877 config.of_node = as3722_regulator_matches[id].of_node; 878 rdev = devm_regulator_register(&pdev->dev, 879 &as3722_regs->desc[id], &config); 880 if (IS_ERR(rdev)) { 881 ret = PTR_ERR(rdev); 882 dev_err(&pdev->dev, "regulator %d register failed %d\n", 883 id, ret); 884 return ret; 885 } 886 887 as3722_regs->rdevs[id] = rdev; 888 if (reg_config->ext_control) { 889 ret = regulator_enable_regmap(rdev); 890 if (ret < 0) { 891 dev_err(&pdev->dev, 892 "Regulator %d enable failed: %d\n", 893 id, ret); 894 return ret; 895 } 896 ret = as3722_extreg_init(as3722_regs, id, 897 reg_config->ext_control); 898 if (ret < 0) { 899 dev_err(&pdev->dev, 900 "AS3722 ext control failed: %d", ret); 901 return ret; 902 } 903 } 904 } 905 return 0; 906 } 907 908 static const struct of_device_id of_as3722_regulator_match[] = { 909 { .compatible = "ams,as3722-regulator", }, 910 {}, 911 }; 912 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match); 913 914 static struct platform_driver as3722_regulator_driver = { 915 .driver = { 916 .name = "as3722-regulator", 917 .owner = THIS_MODULE, 918 .of_match_table = of_as3722_regulator_match, 919 }, 920 .probe = as3722_regulator_probe, 921 }; 922 923 module_platform_driver(as3722_regulator_driver); 924 925 MODULE_ALIAS("platform:as3722-regulator"); 926 MODULE_DESCRIPTION("AS3722 regulator driver"); 927 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>"); 928 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); 929 MODULE_LICENSE("GPL"); 930