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 .sname = "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 .sname = "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 const 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 const 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 const 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 const 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_ops as3722_ldo6_ops = { 436 .is_enabled = regulator_is_enabled_regmap, 437 .enable = regulator_enable_regmap, 438 .disable = regulator_disable_regmap, 439 .map_voltage = regulator_map_voltage_linear_range, 440 .set_voltage_sel = regulator_set_voltage_sel_regmap, 441 .get_voltage_sel = regulator_get_voltage_sel_regmap, 442 .list_voltage = regulator_list_voltage_linear_range, 443 .get_current_limit = as3722_ldo_get_current_limit, 444 .set_current_limit = as3722_ldo_set_current_limit, 445 .get_bypass = regulator_get_bypass_regmap, 446 .set_bypass = regulator_set_bypass_regmap, 447 }; 448 449 static const struct regulator_ops as3722_ldo6_extcntrl_ops = { 450 .map_voltage = regulator_map_voltage_linear_range, 451 .set_voltage_sel = regulator_set_voltage_sel_regmap, 452 .get_voltage_sel = regulator_get_voltage_sel_regmap, 453 .list_voltage = regulator_list_voltage_linear_range, 454 .get_current_limit = as3722_ldo_get_current_limit, 455 .set_current_limit = as3722_ldo_set_current_limit, 456 .get_bypass = regulator_get_bypass_regmap, 457 .set_bypass = regulator_set_bypass_regmap, 458 }; 459 460 static const struct regulator_linear_range as3722_ldo_ranges[] = { 461 REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0), 462 REGULATOR_LINEAR_RANGE(825000, 0x01, 0x24, 25000), 463 REGULATOR_LINEAR_RANGE(1725000, 0x40, 0x7F, 25000), 464 }; 465 466 static const struct regulator_ops as3722_ldo_ops = { 467 .is_enabled = regulator_is_enabled_regmap, 468 .enable = regulator_enable_regmap, 469 .disable = regulator_disable_regmap, 470 .map_voltage = regulator_map_voltage_linear_range, 471 .set_voltage_sel = regulator_set_voltage_sel_regmap, 472 .get_voltage_sel = regulator_get_voltage_sel_regmap, 473 .list_voltage = regulator_list_voltage_linear_range, 474 .get_current_limit = as3722_ldo_get_current_limit, 475 .set_current_limit = as3722_ldo_set_current_limit, 476 }; 477 478 static const struct regulator_ops as3722_ldo_extcntrl_ops = { 479 .map_voltage = regulator_map_voltage_linear_range, 480 .set_voltage_sel = regulator_set_voltage_sel_regmap, 481 .get_voltage_sel = regulator_get_voltage_sel_regmap, 482 .list_voltage = regulator_list_voltage_linear_range, 483 .get_current_limit = as3722_ldo_get_current_limit, 484 .set_current_limit = as3722_ldo_set_current_limit, 485 }; 486 487 static unsigned int as3722_sd_get_mode(struct regulator_dev *rdev) 488 { 489 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 490 struct as3722 *as3722 = as3722_regs->as3722; 491 int id = rdev_get_id(rdev); 492 u32 val; 493 int ret; 494 495 if (!as3722_reg_lookup[id].control_reg) 496 return -ENOTSUPP; 497 498 ret = as3722_read(as3722, as3722_reg_lookup[id].control_reg, &val); 499 if (ret < 0) { 500 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 501 as3722_reg_lookup[id].control_reg, ret); 502 return ret; 503 } 504 505 if (val & as3722_reg_lookup[id].mode_mask) 506 return REGULATOR_MODE_FAST; 507 else 508 return REGULATOR_MODE_NORMAL; 509 } 510 511 static int as3722_sd_set_mode(struct regulator_dev *rdev, 512 unsigned int mode) 513 { 514 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 515 struct as3722 *as3722 = as3722_regs->as3722; 516 u8 id = rdev_get_id(rdev); 517 u8 val = 0; 518 int ret; 519 520 if (!as3722_reg_lookup[id].control_reg) 521 return -ERANGE; 522 523 switch (mode) { 524 case REGULATOR_MODE_FAST: 525 val = as3722_reg_lookup[id].mode_mask; 526 case REGULATOR_MODE_NORMAL: /* fall down */ 527 break; 528 default: 529 return -EINVAL; 530 } 531 532 ret = as3722_update_bits(as3722, as3722_reg_lookup[id].control_reg, 533 as3722_reg_lookup[id].mode_mask, val); 534 if (ret < 0) { 535 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n", 536 as3722_reg_lookup[id].control_reg, ret); 537 return ret; 538 } 539 return ret; 540 } 541 542 static int as3722_sd016_get_current_limit(struct regulator_dev *rdev) 543 { 544 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 545 struct as3722 *as3722 = as3722_regs->as3722; 546 int id = rdev_get_id(rdev); 547 u32 val, reg; 548 int mask; 549 int ret; 550 551 switch (id) { 552 case AS3722_REGULATOR_ID_SD0: 553 reg = AS3722_OVCURRENT_REG; 554 mask = AS3722_OVCURRENT_SD0_TRIP_MASK; 555 break; 556 case AS3722_REGULATOR_ID_SD1: 557 reg = AS3722_OVCURRENT_REG; 558 mask = AS3722_OVCURRENT_SD1_TRIP_MASK; 559 break; 560 case AS3722_REGULATOR_ID_SD6: 561 reg = AS3722_OVCURRENT_DEB_REG; 562 mask = AS3722_OVCURRENT_SD6_TRIP_MASK; 563 break; 564 default: 565 return -EINVAL; 566 } 567 ret = as3722_read(as3722, reg, &val); 568 if (ret < 0) { 569 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 570 reg, ret); 571 return ret; 572 } 573 val &= mask; 574 val >>= ffs(mask) - 1; 575 if (val == 3) 576 return -EINVAL; 577 return as3722_sd016_current[val]; 578 } 579 580 static int as3722_sd016_set_current_limit(struct regulator_dev *rdev, 581 int min_uA, int max_uA) 582 { 583 struct as3722_regulators *as3722_regs = rdev_get_drvdata(rdev); 584 struct as3722 *as3722 = as3722_regs->as3722; 585 int id = rdev_get_id(rdev); 586 int ret; 587 int val; 588 int mask; 589 u32 reg; 590 591 ret = as3722_current_to_index(min_uA, max_uA, as3722_sd016_current, 592 ARRAY_SIZE(as3722_sd016_current)); 593 if (ret < 0) { 594 dev_err(as3722_regs->dev, 595 "Current range min:max = %d:%d does not support\n", 596 min_uA, max_uA); 597 return ret; 598 } 599 600 switch (id) { 601 case AS3722_REGULATOR_ID_SD0: 602 reg = AS3722_OVCURRENT_REG; 603 mask = AS3722_OVCURRENT_SD0_TRIP_MASK; 604 break; 605 case AS3722_REGULATOR_ID_SD1: 606 reg = AS3722_OVCURRENT_REG; 607 mask = AS3722_OVCURRENT_SD1_TRIP_MASK; 608 break; 609 case AS3722_REGULATOR_ID_SD6: 610 reg = AS3722_OVCURRENT_DEB_REG; 611 mask = AS3722_OVCURRENT_SD6_TRIP_MASK; 612 break; 613 default: 614 return -EINVAL; 615 } 616 ret <<= ffs(mask) - 1; 617 val = ret & mask; 618 return as3722_update_bits(as3722, reg, mask, val); 619 } 620 621 static bool as3722_sd0_is_low_voltage(struct as3722_regulators *as3722_regs) 622 { 623 int err; 624 unsigned val; 625 626 err = as3722_read(as3722_regs->as3722, AS3722_FUSE7_REG, &val); 627 if (err < 0) { 628 dev_err(as3722_regs->dev, "Reg 0x%02x read failed: %d\n", 629 AS3722_FUSE7_REG, err); 630 return false; 631 } 632 if (val & AS3722_FUSE7_SD0_LOW_VOLTAGE) 633 return true; 634 return false; 635 } 636 637 static const struct regulator_linear_range as3722_sd2345_ranges[] = { 638 REGULATOR_LINEAR_RANGE(0, 0x00, 0x00, 0), 639 REGULATOR_LINEAR_RANGE(612500, 0x01, 0x40, 12500), 640 REGULATOR_LINEAR_RANGE(1425000, 0x41, 0x70, 25000), 641 REGULATOR_LINEAR_RANGE(2650000, 0x71, 0x7F, 50000), 642 }; 643 644 static const struct regulator_ops as3722_sd016_ops = { 645 .is_enabled = regulator_is_enabled_regmap, 646 .enable = regulator_enable_regmap, 647 .disable = regulator_disable_regmap, 648 .list_voltage = regulator_list_voltage_linear, 649 .map_voltage = regulator_map_voltage_linear, 650 .get_voltage_sel = regulator_get_voltage_sel_regmap, 651 .set_voltage_sel = regulator_set_voltage_sel_regmap, 652 .get_current_limit = as3722_sd016_get_current_limit, 653 .set_current_limit = as3722_sd016_set_current_limit, 654 .get_mode = as3722_sd_get_mode, 655 .set_mode = as3722_sd_set_mode, 656 }; 657 658 static const struct regulator_ops as3722_sd016_extcntrl_ops = { 659 .list_voltage = regulator_list_voltage_linear, 660 .map_voltage = regulator_map_voltage_linear, 661 .get_voltage_sel = regulator_get_voltage_sel_regmap, 662 .set_voltage_sel = regulator_set_voltage_sel_regmap, 663 .get_current_limit = as3722_sd016_get_current_limit, 664 .set_current_limit = as3722_sd016_set_current_limit, 665 .get_mode = as3722_sd_get_mode, 666 .set_mode = as3722_sd_set_mode, 667 }; 668 669 static const struct regulator_ops as3722_sd2345_ops = { 670 .is_enabled = regulator_is_enabled_regmap, 671 .enable = regulator_enable_regmap, 672 .disable = regulator_disable_regmap, 673 .list_voltage = regulator_list_voltage_linear_range, 674 .map_voltage = regulator_map_voltage_linear_range, 675 .set_voltage_sel = regulator_set_voltage_sel_regmap, 676 .get_voltage_sel = regulator_get_voltage_sel_regmap, 677 .get_mode = as3722_sd_get_mode, 678 .set_mode = as3722_sd_set_mode, 679 }; 680 681 static const struct regulator_ops as3722_sd2345_extcntrl_ops = { 682 .list_voltage = regulator_list_voltage_linear_range, 683 .map_voltage = regulator_map_voltage_linear_range, 684 .set_voltage_sel = regulator_set_voltage_sel_regmap, 685 .get_voltage_sel = regulator_get_voltage_sel_regmap, 686 .get_mode = as3722_sd_get_mode, 687 .set_mode = as3722_sd_set_mode, 688 }; 689 690 static int as3722_extreg_init(struct as3722_regulators *as3722_regs, int id, 691 int ext_pwr_ctrl) 692 { 693 int ret; 694 unsigned int val; 695 696 if ((ext_pwr_ctrl < AS3722_EXT_CONTROL_ENABLE1) || 697 (ext_pwr_ctrl > AS3722_EXT_CONTROL_ENABLE3)) 698 return -EINVAL; 699 700 val = ext_pwr_ctrl << (ffs(as3722_reg_lookup[id].sleep_ctrl_mask) - 1); 701 ret = as3722_update_bits(as3722_regs->as3722, 702 as3722_reg_lookup[id].sleep_ctrl_reg, 703 as3722_reg_lookup[id].sleep_ctrl_mask, val); 704 if (ret < 0) 705 dev_err(as3722_regs->dev, "Reg 0x%02x update failed: %d\n", 706 as3722_reg_lookup[id].sleep_ctrl_reg, ret); 707 return ret; 708 } 709 710 static struct of_regulator_match as3722_regulator_matches[] = { 711 { .name = "sd0", }, 712 { .name = "sd1", }, 713 { .name = "sd2", }, 714 { .name = "sd3", }, 715 { .name = "sd4", }, 716 { .name = "sd5", }, 717 { .name = "sd6", }, 718 { .name = "ldo0", }, 719 { .name = "ldo1", }, 720 { .name = "ldo2", }, 721 { .name = "ldo3", }, 722 { .name = "ldo4", }, 723 { .name = "ldo5", }, 724 { .name = "ldo6", }, 725 { .name = "ldo7", }, 726 { .name = "ldo9", }, 727 { .name = "ldo10", }, 728 { .name = "ldo11", }, 729 }; 730 731 static int as3722_get_regulator_dt_data(struct platform_device *pdev, 732 struct as3722_regulators *as3722_regs) 733 { 734 struct device_node *np; 735 struct as3722_regulator_config_data *reg_config; 736 u32 prop; 737 int id; 738 int ret; 739 740 np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators"); 741 if (!np) { 742 dev_err(&pdev->dev, "Device is not having regulators node\n"); 743 return -ENODEV; 744 } 745 pdev->dev.of_node = np; 746 747 ret = of_regulator_match(&pdev->dev, np, as3722_regulator_matches, 748 ARRAY_SIZE(as3722_regulator_matches)); 749 of_node_put(np); 750 if (ret < 0) { 751 dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n", 752 ret); 753 return ret; 754 } 755 756 for (id = 0; id < ARRAY_SIZE(as3722_regulator_matches); ++id) { 757 struct device_node *reg_node; 758 759 reg_config = &as3722_regs->reg_config_data[id]; 760 reg_config->reg_init = as3722_regulator_matches[id].init_data; 761 reg_node = as3722_regulator_matches[id].of_node; 762 763 if (!reg_config->reg_init || !reg_node) 764 continue; 765 766 ret = of_property_read_u32(reg_node, "ams,ext-control", &prop); 767 if (!ret) { 768 if (prop < 3) 769 reg_config->ext_control = prop; 770 else 771 dev_warn(&pdev->dev, 772 "ext-control have invalid option: %u\n", 773 prop); 774 } 775 reg_config->enable_tracking = 776 of_property_read_bool(reg_node, "ams,enable-tracking"); 777 } 778 return 0; 779 } 780 781 static int as3722_regulator_probe(struct platform_device *pdev) 782 { 783 struct as3722 *as3722 = dev_get_drvdata(pdev->dev.parent); 784 struct as3722_regulators *as3722_regs; 785 struct as3722_regulator_config_data *reg_config; 786 struct regulator_dev *rdev; 787 struct regulator_config config = { }; 788 const struct regulator_ops *ops; 789 int id; 790 int ret; 791 792 as3722_regs = devm_kzalloc(&pdev->dev, sizeof(*as3722_regs), 793 GFP_KERNEL); 794 if (!as3722_regs) 795 return -ENOMEM; 796 797 as3722_regs->dev = &pdev->dev; 798 as3722_regs->as3722 = as3722; 799 platform_set_drvdata(pdev, as3722_regs); 800 801 ret = as3722_get_regulator_dt_data(pdev, as3722_regs); 802 if (ret < 0) 803 return ret; 804 805 config.dev = &pdev->dev; 806 config.driver_data = as3722_regs; 807 config.regmap = as3722->regmap; 808 809 for (id = 0; id < AS3722_REGULATOR_ID_MAX; id++) { 810 reg_config = &as3722_regs->reg_config_data[id]; 811 812 as3722_regs->desc[id].name = as3722_reg_lookup[id].name; 813 as3722_regs->desc[id].supply_name = as3722_reg_lookup[id].sname; 814 as3722_regs->desc[id].id = as3722_reg_lookup[id].regulator_id; 815 as3722_regs->desc[id].n_voltages = 816 as3722_reg_lookup[id].n_voltages; 817 as3722_regs->desc[id].type = REGULATOR_VOLTAGE; 818 as3722_regs->desc[id].owner = THIS_MODULE; 819 as3722_regs->desc[id].enable_reg = 820 as3722_reg_lookup[id].enable_reg; 821 as3722_regs->desc[id].enable_mask = 822 as3722_reg_lookup[id].enable_mask; 823 as3722_regs->desc[id].vsel_reg = as3722_reg_lookup[id].vsel_reg; 824 as3722_regs->desc[id].vsel_mask = 825 as3722_reg_lookup[id].vsel_mask; 826 switch (id) { 827 case AS3722_REGULATOR_ID_LDO0: 828 if (reg_config->ext_control) 829 ops = &as3722_ldo0_extcntrl_ops; 830 else 831 ops = &as3722_ldo0_ops; 832 as3722_regs->desc[id].min_uV = 825000; 833 as3722_regs->desc[id].uV_step = 25000; 834 as3722_regs->desc[id].linear_min_sel = 1; 835 as3722_regs->desc[id].enable_time = 500; 836 break; 837 case AS3722_REGULATOR_ID_LDO3: 838 if (reg_config->ext_control) 839 ops = &as3722_ldo3_extcntrl_ops; 840 else 841 ops = &as3722_ldo3_ops; 842 as3722_regs->desc[id].min_uV = 620000; 843 as3722_regs->desc[id].uV_step = 20000; 844 as3722_regs->desc[id].linear_min_sel = 1; 845 as3722_regs->desc[id].enable_time = 500; 846 if (reg_config->enable_tracking) { 847 ret = as3722_ldo3_set_tracking_mode(as3722_regs, 848 id, AS3722_LDO3_MODE_PMOS_TRACKING); 849 if (ret < 0) { 850 dev_err(&pdev->dev, 851 "LDO3 tracking failed: %d\n", 852 ret); 853 return ret; 854 } 855 } 856 break; 857 case AS3722_REGULATOR_ID_LDO6: 858 if (reg_config->ext_control) 859 ops = &as3722_ldo6_extcntrl_ops; 860 else 861 ops = &as3722_ldo6_ops; 862 as3722_regs->desc[id].enable_time = 500; 863 as3722_regs->desc[id].bypass_reg = 864 AS3722_LDO6_VOLTAGE_REG; 865 as3722_regs->desc[id].bypass_mask = 866 AS3722_LDO_VSEL_MASK; 867 as3722_regs->desc[id].bypass_val_on = 868 AS3722_LDO6_VSEL_BYPASS; 869 as3722_regs->desc[id].bypass_val_off = 870 AS3722_LDO6_VSEL_BYPASS; 871 as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges; 872 as3722_regs->desc[id].n_linear_ranges = 873 ARRAY_SIZE(as3722_ldo_ranges); 874 break; 875 case AS3722_REGULATOR_ID_SD0: 876 case AS3722_REGULATOR_ID_SD1: 877 case AS3722_REGULATOR_ID_SD6: 878 if (reg_config->ext_control) 879 ops = &as3722_sd016_extcntrl_ops; 880 else 881 ops = &as3722_sd016_ops; 882 if (id == AS3722_REGULATOR_ID_SD0 && 883 as3722_sd0_is_low_voltage(as3722_regs)) { 884 as3722_regs->desc[id].n_voltages = 885 AS3722_SD0_VSEL_LOW_VOL_MAX + 1; 886 as3722_regs->desc[id].min_uV = 410000; 887 } else { 888 as3722_regs->desc[id].n_voltages = 889 AS3722_SD0_VSEL_MAX + 1, 890 as3722_regs->desc[id].min_uV = 610000; 891 } 892 as3722_regs->desc[id].uV_step = 10000; 893 as3722_regs->desc[id].linear_min_sel = 1; 894 as3722_regs->desc[id].enable_time = 600; 895 break; 896 case AS3722_REGULATOR_ID_SD2: 897 case AS3722_REGULATOR_ID_SD3: 898 case AS3722_REGULATOR_ID_SD4: 899 case AS3722_REGULATOR_ID_SD5: 900 if (reg_config->ext_control) 901 ops = &as3722_sd2345_extcntrl_ops; 902 else 903 ops = &as3722_sd2345_ops; 904 as3722_regs->desc[id].linear_ranges = 905 as3722_sd2345_ranges; 906 as3722_regs->desc[id].n_linear_ranges = 907 ARRAY_SIZE(as3722_sd2345_ranges); 908 break; 909 default: 910 if (reg_config->ext_control) 911 ops = &as3722_ldo_extcntrl_ops; 912 else 913 ops = &as3722_ldo_ops; 914 as3722_regs->desc[id].enable_time = 500; 915 as3722_regs->desc[id].linear_ranges = as3722_ldo_ranges; 916 as3722_regs->desc[id].n_linear_ranges = 917 ARRAY_SIZE(as3722_ldo_ranges); 918 break; 919 } 920 as3722_regs->desc[id].ops = ops; 921 config.init_data = reg_config->reg_init; 922 config.of_node = as3722_regulator_matches[id].of_node; 923 rdev = devm_regulator_register(&pdev->dev, 924 &as3722_regs->desc[id], &config); 925 if (IS_ERR(rdev)) { 926 ret = PTR_ERR(rdev); 927 dev_err(&pdev->dev, "regulator %d register failed %d\n", 928 id, ret); 929 return ret; 930 } 931 932 as3722_regs->rdevs[id] = rdev; 933 if (reg_config->ext_control) { 934 ret = regulator_enable_regmap(rdev); 935 if (ret < 0) { 936 dev_err(&pdev->dev, 937 "Regulator %d enable failed: %d\n", 938 id, ret); 939 return ret; 940 } 941 ret = as3722_extreg_init(as3722_regs, id, 942 reg_config->ext_control); 943 if (ret < 0) { 944 dev_err(&pdev->dev, 945 "AS3722 ext control failed: %d", ret); 946 return ret; 947 } 948 } 949 } 950 return 0; 951 } 952 953 static const struct of_device_id of_as3722_regulator_match[] = { 954 { .compatible = "ams,as3722-regulator", }, 955 {}, 956 }; 957 MODULE_DEVICE_TABLE(of, of_as3722_regulator_match); 958 959 static struct platform_driver as3722_regulator_driver = { 960 .driver = { 961 .name = "as3722-regulator", 962 .of_match_table = of_as3722_regulator_match, 963 }, 964 .probe = as3722_regulator_probe, 965 }; 966 967 module_platform_driver(as3722_regulator_driver); 968 969 MODULE_ALIAS("platform:as3722-regulator"); 970 MODULE_DESCRIPTION("AS3722 regulator driver"); 971 MODULE_AUTHOR("Florian Lobmaier <florian.lobmaier@ams.com>"); 972 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); 973 MODULE_LICENSE("GPL"); 974