1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // Copyright 2014 Embest Technology Co. Ltd. Inc. 4 // bd71815-regulator.c ROHM BD71815 regulator driver 5 // 6 // Author: Tony Luo <luofc@embedinfo.com> 7 // 8 // Partially rewritten at 2021 by 9 // Matti Vaittinen <matti.vaitinen@fi.rohmeurope.com> 10 11 #include <linux/kernel.h> 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/err.h> 15 #include <linux/platform_device.h> 16 #include <linux/of.h> 17 #include <linux/gpio/consumer.h> 18 #include <linux/regulator/driver.h> 19 #include <linux/delay.h> 20 #include <linux/slab.h> 21 #include <linux/gpio.h> 22 #include <linux/mfd/rohm-generic.h> 23 #include <linux/mfd/rohm-bd71815.h> 24 #include <linux/regulator/of_regulator.h> 25 26 struct bd71815_regulator { 27 struct regulator_desc desc; 28 const struct rohm_dvs_config *dvs; 29 }; 30 31 static const int bd7181x_wled_currents[] = { 32 10, 20, 30, 50, 70, 100, 200, 300, 500, 700, 1000, 2000, 3000, 4000, 33 5000, 6000, 7000, 8000, 9000, 10000, 11000, 12000, 13000, 14000, 15000, 34 16000, 17000, 18000, 19000, 20000, 21000, 22000, 23000, 24000, 25000, 35 }; 36 37 static const struct rohm_dvs_config buck1_dvs = { 38 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 39 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 40 .run_reg = BD71815_REG_BUCK1_VOLT_H, 41 .run_mask = BD71815_VOLT_MASK, 42 .run_on_mask = BD71815_BUCK_RUN_ON, 43 .snvs_on_mask = BD71815_BUCK_SNVS_ON, 44 .suspend_reg = BD71815_REG_BUCK1_VOLT_L, 45 .suspend_mask = BD71815_VOLT_MASK, 46 .suspend_on_mask = BD71815_BUCK_SUSP_ON, 47 .lpsr_reg = BD71815_REG_BUCK1_VOLT_L, 48 .lpsr_mask = BD71815_VOLT_MASK, 49 .lpsr_on_mask = BD71815_BUCK_LPSR_ON, 50 }; 51 52 static const struct rohm_dvs_config buck2_dvs = { 53 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 54 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 55 .run_reg = BD71815_REG_BUCK2_VOLT_H, 56 .run_mask = BD71815_VOLT_MASK, 57 .run_on_mask = BD71815_BUCK_RUN_ON, 58 .snvs_on_mask = BD71815_BUCK_SNVS_ON, 59 .suspend_reg = BD71815_REG_BUCK2_VOLT_L, 60 .suspend_mask = BD71815_VOLT_MASK, 61 .suspend_on_mask = BD71815_BUCK_SUSP_ON, 62 .lpsr_reg = BD71815_REG_BUCK2_VOLT_L, 63 .lpsr_mask = BD71815_VOLT_MASK, 64 .lpsr_on_mask = BD71815_BUCK_LPSR_ON, 65 }; 66 67 static const struct rohm_dvs_config buck3_dvs = { 68 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 69 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 70 .run_reg = BD71815_REG_BUCK3_VOLT, 71 .run_mask = BD71815_VOLT_MASK, 72 .run_on_mask = BD71815_BUCK_RUN_ON, 73 .snvs_on_mask = BD71815_BUCK_SNVS_ON, 74 .suspend_on_mask = BD71815_BUCK_SUSP_ON, 75 .lpsr_on_mask = BD71815_BUCK_LPSR_ON, 76 }; 77 78 static const struct rohm_dvs_config buck4_dvs = { 79 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 80 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 81 .run_reg = BD71815_REG_BUCK4_VOLT, 82 .run_mask = BD71815_VOLT_MASK, 83 .run_on_mask = BD71815_BUCK_RUN_ON, 84 .snvs_on_mask = BD71815_BUCK_SNVS_ON, 85 .suspend_on_mask = BD71815_BUCK_SUSP_ON, 86 .lpsr_on_mask = BD71815_BUCK_LPSR_ON, 87 }; 88 89 static const struct rohm_dvs_config ldo1_dvs = { 90 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 91 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 92 .run_reg = BD71815_REG_LDO_MODE1, 93 .run_mask = BD71815_VOLT_MASK, 94 .run_on_mask = LDO1_RUN_ON, 95 .snvs_on_mask = LDO1_SNVS_ON, 96 .suspend_on_mask = LDO1_SUSP_ON, 97 .lpsr_on_mask = LDO1_LPSR_ON, 98 }; 99 100 static const struct rohm_dvs_config ldo2_dvs = { 101 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 102 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 103 .run_reg = BD71815_REG_LDO_MODE2, 104 .run_mask = BD71815_VOLT_MASK, 105 .run_on_mask = LDO2_RUN_ON, 106 .snvs_on_mask = LDO2_SNVS_ON, 107 .suspend_on_mask = LDO2_SUSP_ON, 108 .lpsr_on_mask = LDO2_LPSR_ON, 109 }; 110 111 static const struct rohm_dvs_config ldo3_dvs = { 112 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 113 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 114 .run_reg = BD71815_REG_LDO_MODE2, 115 .run_mask = BD71815_VOLT_MASK, 116 .run_on_mask = LDO3_RUN_ON, 117 .snvs_on_mask = LDO3_SNVS_ON, 118 .suspend_on_mask = LDO3_SUSP_ON, 119 .lpsr_on_mask = LDO3_LPSR_ON, 120 }; 121 122 static const struct rohm_dvs_config ldo4_dvs = { 123 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 124 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 125 .run_reg = BD71815_REG_LDO_MODE3, 126 .run_mask = BD71815_VOLT_MASK, 127 .run_on_mask = LDO4_RUN_ON, 128 .snvs_on_mask = LDO4_SNVS_ON, 129 .suspend_on_mask = LDO4_SUSP_ON, 130 .lpsr_on_mask = LDO4_LPSR_ON, 131 }; 132 133 static const struct rohm_dvs_config ldo5_dvs = { 134 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 135 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 136 .run_reg = BD71815_REG_LDO_MODE3, 137 .run_mask = BD71815_VOLT_MASK, 138 .run_on_mask = LDO5_RUN_ON, 139 .snvs_on_mask = LDO5_SNVS_ON, 140 .suspend_on_mask = LDO5_SUSP_ON, 141 .lpsr_on_mask = LDO5_LPSR_ON, 142 }; 143 144 static const struct rohm_dvs_config dvref_dvs = { 145 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 146 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 147 .run_on_mask = DVREF_RUN_ON, 148 .snvs_on_mask = DVREF_SNVS_ON, 149 .suspend_on_mask = DVREF_SUSP_ON, 150 .lpsr_on_mask = DVREF_LPSR_ON, 151 }; 152 153 static const struct rohm_dvs_config ldolpsr_dvs = { 154 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 155 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 156 .run_on_mask = DVREF_RUN_ON, 157 .snvs_on_mask = DVREF_SNVS_ON, 158 .suspend_on_mask = DVREF_SUSP_ON, 159 .lpsr_on_mask = DVREF_LPSR_ON, 160 }; 161 162 static const struct rohm_dvs_config buck5_dvs = { 163 .level_map = ROHM_DVS_LEVEL_RUN | ROHM_DVS_LEVEL_SNVS | 164 ROHM_DVS_LEVEL_SUSPEND | ROHM_DVS_LEVEL_LPSR, 165 .run_reg = BD71815_REG_BUCK5_VOLT, 166 .run_mask = BD71815_VOLT_MASK, 167 .run_on_mask = BD71815_BUCK_RUN_ON, 168 .snvs_on_mask = BD71815_BUCK_SNVS_ON, 169 .suspend_on_mask = BD71815_BUCK_SUSP_ON, 170 .lpsr_on_mask = BD71815_BUCK_LPSR_ON, 171 }; 172 173 static int set_hw_dvs_levels(struct device_node *np, 174 const struct regulator_desc *desc, 175 struct regulator_config *cfg) 176 { 177 struct bd71815_regulator *data; 178 179 data = container_of(desc, struct bd71815_regulator, desc); 180 return rohm_regulator_set_dvs_levels(data->dvs, np, desc, cfg->regmap); 181 } 182 183 /* 184 * Bucks 1 and 2 have two voltage selection registers where selected 185 * voltage can be set. Which of the registers is used can be either controlled 186 * by a control bit in register - or by HW state. If HW state specific voltages 187 * are given - then we assume HW state based control should be used. 188 * 189 * If volatge value is updated to currently selected register - then output 190 * voltage is immediately changed no matter what is set as ramp rate. Thus we 191 * default changing voltage by writing new value to inactive register and 192 * then updating the 'register selection' bit. This naturally only works when 193 * HW state machine is not used to select the voltage. 194 */ 195 static int buck12_set_hw_dvs_levels(struct device_node *np, 196 const struct regulator_desc *desc, 197 struct regulator_config *cfg) 198 { 199 struct bd71815_regulator *data; 200 int ret = 0, val; 201 202 data = container_of(desc, struct bd71815_regulator, desc); 203 204 if (of_find_property(np, "rohm,dvs-run-voltage", NULL) || 205 of_find_property(np, "rohm,dvs-suspend-voltage", NULL) || 206 of_find_property(np, "rohm,dvs-lpsr-voltage", NULL) || 207 of_find_property(np, "rohm,dvs-snvs-voltage", NULL)) { 208 ret = regmap_read(cfg->regmap, desc->vsel_reg, &val); 209 if (ret) 210 return ret; 211 212 if (!(BD71815_BUCK_STBY_DVS & val) && 213 !(BD71815_BUCK_DVSSEL & val)) { 214 int val2; 215 216 /* 217 * We are currently using voltage from _L. 218 * We'd better copy it to _H and switch to it to 219 * avoid shutting us down if LPSR or SUSPEND is set to 220 * disabled. _L value is at reg _H + 1 221 */ 222 ret = regmap_read(cfg->regmap, desc->vsel_reg + 1, 223 &val2); 224 if (ret) 225 return ret; 226 227 ret = regmap_update_bits(cfg->regmap, desc->vsel_reg, 228 BD71815_VOLT_MASK | 229 BD71815_BUCK_DVSSEL, 230 val2 | BD71815_BUCK_DVSSEL); 231 if (ret) 232 return ret; 233 } 234 ret = rohm_regulator_set_dvs_levels(data->dvs, np, desc, 235 cfg->regmap); 236 if (ret) 237 return ret; 238 /* 239 * DVS levels were given => use HW-state machine for voltage 240 * controls. NOTE: AFAIK, This means that if voltage is changed 241 * by SW the ramp-rate is not respected. Should we disable 242 * SW voltage control when the HW state machine is used? 243 */ 244 ret = regmap_update_bits(cfg->regmap, desc->vsel_reg, 245 BD71815_BUCK_STBY_DVS, 246 BD71815_BUCK_STBY_DVS); 247 } 248 249 return ret; 250 } 251 252 /* 253 * BUCK1/2 254 * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting 255 * 00: 10.00mV/usec 10mV 1uS 256 * 01: 5.00mV/usec 10mV 2uS 257 * 10: 2.50mV/usec 10mV 4uS 258 * 11: 1.25mV/usec 10mV 8uS 259 */ 260 static const unsigned int bd7181x_ramp_table[] = { 1250, 2500, 5000, 10000 }; 261 262 static int bd7181x_led_set_current_limit(struct regulator_dev *rdev, 263 int min_uA, int max_uA) 264 { 265 int ret; 266 int onstatus; 267 268 onstatus = regulator_is_enabled_regmap(rdev); 269 270 ret = regulator_set_current_limit_regmap(rdev, min_uA, max_uA); 271 if (!ret) { 272 int newstatus; 273 274 newstatus = regulator_is_enabled_regmap(rdev); 275 if (onstatus != newstatus) { 276 /* 277 * HW FIX: spurious led status change detected. Toggle 278 * state as a workaround 279 */ 280 if (onstatus) 281 ret = regulator_enable_regmap(rdev); 282 else 283 ret = regulator_disable_regmap(rdev); 284 285 if (ret) 286 dev_err(rdev_get_dev(rdev), 287 "failed to revert the LED state (%d)\n", 288 ret); 289 } 290 } 291 292 return ret; 293 } 294 295 static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev) 296 { 297 int rid = rdev_get_id(rdev); 298 int ret, regh, regl, val; 299 300 regh = BD71815_REG_BUCK1_VOLT_H + rid * 0x2; 301 regl = BD71815_REG_BUCK1_VOLT_L + rid * 0x2; 302 303 ret = regmap_read(rdev->regmap, regh, &val); 304 if (ret) 305 return ret; 306 307 /* 308 * If we use HW state machine based voltage reg selection - then we 309 * return BD71815_REG_BUCK1_VOLT_H which is used at RUN. 310 * Else we do return the BD71815_REG_BUCK1_VOLT_H or 311 * BD71815_REG_BUCK1_VOLT_L depending on which is selected to be used 312 * by BD71815_BUCK_DVSSEL bit 313 */ 314 if ((!(val & BD71815_BUCK_STBY_DVS)) && (!(val & BD71815_BUCK_DVSSEL))) 315 ret = regmap_read(rdev->regmap, regl, &val); 316 317 if (ret) 318 return ret; 319 320 return val & BD71815_VOLT_MASK; 321 } 322 323 /* 324 * For Buck 1/2. 325 */ 326 static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev, 327 unsigned int sel) 328 { 329 int rid = rdev_get_id(rdev); 330 int ret, val, reg, regh, regl; 331 332 regh = BD71815_REG_BUCK1_VOLT_H + rid*0x2; 333 regl = BD71815_REG_BUCK1_VOLT_L + rid*0x2; 334 335 ret = regmap_read(rdev->regmap, regh, &val); 336 if (ret) 337 return ret; 338 339 /* 340 * If bucks 1 & 2 are controlled by state machine - then the RUN state 341 * voltage is set to BD71815_REG_BUCK1_VOLT_H. Changing SUSPEND/LPSR 342 * voltages at runtime is not supported by this driver. 343 */ 344 if (((val & BD71815_BUCK_STBY_DVS))) { 345 return regmap_update_bits(rdev->regmap, regh, BD71815_VOLT_MASK, 346 sel); 347 } 348 /* Update new voltage to the register which is not selected now */ 349 if (val & BD71815_BUCK_DVSSEL) 350 reg = regl; 351 else 352 reg = regh; 353 354 ret = regmap_update_bits(rdev->regmap, reg, BD71815_VOLT_MASK, sel); 355 if (ret) 356 return ret; 357 358 /* Select the other DVS register to be used */ 359 return regmap_update_bits(rdev->regmap, regh, BD71815_BUCK_DVSSEL, 360 ~val); 361 } 362 363 static const struct regulator_ops bd7181x_ldo_regulator_ops = { 364 .enable = regulator_enable_regmap, 365 .disable = regulator_disable_regmap, 366 .is_enabled = regulator_is_enabled_regmap, 367 .list_voltage = regulator_list_voltage_linear, 368 .set_voltage_sel = regulator_set_voltage_sel_regmap, 369 .get_voltage_sel = regulator_get_voltage_sel_regmap, 370 }; 371 372 static const struct regulator_ops bd7181x_fixed_regulator_ops = { 373 .enable = regulator_enable_regmap, 374 .disable = regulator_disable_regmap, 375 .is_enabled = regulator_is_enabled_regmap, 376 .list_voltage = regulator_list_voltage_linear, 377 }; 378 379 static const struct regulator_ops bd7181x_buck_regulator_ops = { 380 .enable = regulator_enable_regmap, 381 .disable = regulator_disable_regmap, 382 .is_enabled = regulator_is_enabled_regmap, 383 .list_voltage = regulator_list_voltage_linear, 384 .set_voltage_sel = regulator_set_voltage_sel_regmap, 385 .get_voltage_sel = regulator_get_voltage_sel_regmap, 386 .set_voltage_time_sel = regulator_set_voltage_time_sel, 387 }; 388 389 static const struct regulator_ops bd7181x_buck12_regulator_ops = { 390 .enable = regulator_enable_regmap, 391 .disable = regulator_disable_regmap, 392 .is_enabled = regulator_is_enabled_regmap, 393 .list_voltage = regulator_list_voltage_linear, 394 .set_voltage_sel = bd7181x_buck12_set_voltage_sel, 395 .get_voltage_sel = bd7181x_buck12_get_voltage_sel, 396 .set_voltage_time_sel = regulator_set_voltage_time_sel, 397 .set_ramp_delay = regulator_set_ramp_delay_regmap, 398 }; 399 400 static const struct regulator_ops bd7181x_led_regulator_ops = { 401 .enable = regulator_enable_regmap, 402 .disable = regulator_disable_regmap, 403 .is_enabled = regulator_is_enabled_regmap, 404 .set_current_limit = bd7181x_led_set_current_limit, 405 .get_current_limit = regulator_get_current_limit_regmap, 406 }; 407 408 #define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs) \ 409 [(_id)] = { \ 410 .desc = { \ 411 .name = #_name, \ 412 .of_match = of_match_ptr(#_name), \ 413 .regulators_node = of_match_ptr("regulators"), \ 414 .n_voltages = 1, \ 415 .ops = &bd7181x_fixed_regulator_ops, \ 416 .type = REGULATOR_VOLTAGE, \ 417 .id = (_id), \ 418 .owner = THIS_MODULE, \ 419 .min_uV = (voltage), \ 420 .enable_reg = (ereg), \ 421 .enable_mask = (emsk), \ 422 .of_parse_cb = set_hw_dvs_levels, \ 423 }, \ 424 .dvs = (_dvs), \ 425 } 426 427 #define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs) \ 428 [(_id)] = { \ 429 .desc = { \ 430 .name = #_name, \ 431 .of_match = of_match_ptr(#_name), \ 432 .regulators_node = of_match_ptr("regulators"), \ 433 .n_voltages = ((max) - (min)) / (step) + 1, \ 434 .ops = &bd7181x_buck_regulator_ops, \ 435 .type = REGULATOR_VOLTAGE, \ 436 .id = (_id), \ 437 .owner = THIS_MODULE, \ 438 .min_uV = (min), \ 439 .uV_step = (step), \ 440 .vsel_reg = (vsel), \ 441 .vsel_mask = BD71815_VOLT_MASK, \ 442 .enable_reg = (ereg), \ 443 .enable_mask = BD71815_BUCK_RUN_ON, \ 444 .of_parse_cb = set_hw_dvs_levels, \ 445 }, \ 446 .dvs = (_dvs), \ 447 } 448 449 #define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step, \ 450 _dvs) \ 451 [(_id)] = { \ 452 .desc = { \ 453 .name = #_name, \ 454 .of_match = of_match_ptr(#_name), \ 455 .regulators_node = of_match_ptr("regulators"), \ 456 .n_voltages = ((max) - (min)) / (step) + 1, \ 457 .ops = &bd7181x_buck12_regulator_ops, \ 458 .type = REGULATOR_VOLTAGE, \ 459 .id = (_id), \ 460 .owner = THIS_MODULE, \ 461 .min_uV = (min), \ 462 .uV_step = (step), \ 463 .vsel_reg = (vsel), \ 464 .vsel_mask = BD71815_VOLT_MASK, \ 465 .enable_reg = (ereg), \ 466 .enable_mask = BD71815_BUCK_RUN_ON, \ 467 .ramp_reg = (ereg), \ 468 .ramp_mask = BD71815_BUCK_RAMPRATE_MASK, \ 469 .ramp_delay_table = bd7181x_ramp_table, \ 470 .n_ramp_values = ARRAY_SIZE(bd7181x_ramp_table),\ 471 .of_parse_cb = buck12_set_hw_dvs_levels, \ 472 }, \ 473 .dvs = (_dvs), \ 474 } 475 476 #define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents) \ 477 [(_id)] = { \ 478 .desc = { \ 479 .name = #_name, \ 480 .of_match = of_match_ptr(#_name), \ 481 .regulators_node = of_match_ptr("regulators"), \ 482 .n_current_limits = ARRAY_SIZE(currents), \ 483 .ops = &bd7181x_led_regulator_ops, \ 484 .type = REGULATOR_CURRENT, \ 485 .id = (_id), \ 486 .owner = THIS_MODULE, \ 487 .curr_table = currents, \ 488 .csel_reg = (csel), \ 489 .csel_mask = (mask), \ 490 .enable_reg = (ereg), \ 491 .enable_mask = (emsk), \ 492 }, \ 493 } 494 495 #define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step, \ 496 _dvs) \ 497 [(_id)] = { \ 498 .desc = { \ 499 .name = #_name, \ 500 .of_match = of_match_ptr(#_name), \ 501 .regulators_node = of_match_ptr("regulators"), \ 502 .n_voltages = ((max) - (min)) / (step) + 1, \ 503 .ops = &bd7181x_ldo_regulator_ops, \ 504 .type = REGULATOR_VOLTAGE, \ 505 .id = (_id), \ 506 .owner = THIS_MODULE, \ 507 .min_uV = (min), \ 508 .uV_step = (step), \ 509 .vsel_reg = (vsel), \ 510 .vsel_mask = BD71815_VOLT_MASK, \ 511 .enable_reg = (ereg), \ 512 .enable_mask = (emsk), \ 513 .of_parse_cb = set_hw_dvs_levels, \ 514 }, \ 515 .dvs = (_dvs), \ 516 } 517 518 static const struct bd71815_regulator bd71815_regulators[] = { 519 BD71815_BUCK12_REG(buck1, BD71815_BUCK1, BD71815_REG_BUCK1_VOLT_H, 520 BD71815_REG_BUCK1_MODE, 800000, 2000000, 25000, 521 &buck1_dvs), 522 BD71815_BUCK12_REG(buck2, BD71815_BUCK2, BD71815_REG_BUCK2_VOLT_H, 523 BD71815_REG_BUCK2_MODE, 800000, 2000000, 25000, 524 &buck2_dvs), 525 BD71815_BUCK_REG(buck3, BD71815_BUCK3, BD71815_REG_BUCK3_VOLT, 526 BD71815_REG_BUCK3_MODE, 1200000, 2700000, 50000, 527 &buck3_dvs), 528 BD71815_BUCK_REG(buck4, BD71815_BUCK4, BD71815_REG_BUCK4_VOLT, 529 BD71815_REG_BUCK4_MODE, 1100000, 1850000, 25000, 530 &buck4_dvs), 531 BD71815_BUCK_REG(buck5, BD71815_BUCK5, BD71815_REG_BUCK5_VOLT, 532 BD71815_REG_BUCK5_MODE, 1800000, 3300000, 50000, 533 &buck5_dvs), 534 BD71815_LDO_REG(ldo1, BD71815_LDO1, BD71815_REG_LDO1_VOLT, 535 BD71815_REG_LDO_MODE1, LDO1_RUN_ON, 800000, 3300000, 536 50000, &ldo1_dvs), 537 BD71815_LDO_REG(ldo2, BD71815_LDO2, BD71815_REG_LDO2_VOLT, 538 BD71815_REG_LDO_MODE2, LDO2_RUN_ON, 800000, 3300000, 539 50000, &ldo2_dvs), 540 /* 541 * Let's default LDO3 to be enabled by SW. We can override ops if DT 542 * says LDO3 should be enabled by HW when DCIN is connected. 543 */ 544 BD71815_LDO_REG(ldo3, BD71815_LDO3, BD71815_REG_LDO3_VOLT, 545 BD71815_REG_LDO_MODE2, LDO3_RUN_ON, 800000, 3300000, 546 50000, &ldo3_dvs), 547 BD71815_LDO_REG(ldo4, BD71815_LDO4, BD71815_REG_LDO4_VOLT, 548 BD71815_REG_LDO_MODE3, LDO4_RUN_ON, 800000, 3300000, 549 50000, &ldo4_dvs), 550 BD71815_LDO_REG(ldo5, BD71815_LDO5, BD71815_REG_LDO5_VOLT_H, 551 BD71815_REG_LDO_MODE3, LDO5_RUN_ON, 800000, 3300000, 552 50000, &ldo5_dvs), 553 BD71815_FIXED_REG(ldodvref, BD71815_LDODVREF, BD71815_REG_LDO_MODE4, 554 DVREF_RUN_ON, 3000000, &dvref_dvs), 555 BD71815_FIXED_REG(ldolpsr, BD71815_LDOLPSR, BD71815_REG_LDO_MODE4, 556 LDO_LPSR_RUN_ON, 1800000, &ldolpsr_dvs), 557 BD71815_LED_REG(wled, BD71815_WLED, BD71815_REG_LED_DIMM, LED_DIMM_MASK, 558 BD71815_REG_LED_CTRL, LED_RUN_ON, 559 bd7181x_wled_currents), 560 }; 561 562 static int bd7181x_probe(struct platform_device *pdev) 563 { 564 struct regulator_config config = {}; 565 int i, ret; 566 struct gpio_desc *ldo4_en; 567 struct regmap *regmap; 568 569 regmap = dev_get_regmap(pdev->dev.parent, NULL); 570 if (!regmap) { 571 dev_err(&pdev->dev, "No parent regmap\n"); 572 return -ENODEV; 573 } 574 ldo4_en = devm_gpiod_get_from_of_node(&pdev->dev, 575 pdev->dev.parent->of_node, 576 "rohm,vsel-gpios", 0, 577 GPIOD_ASIS, "ldo4-en"); 578 579 if (IS_ERR(ldo4_en)) { 580 ret = PTR_ERR(ldo4_en); 581 if (ret != -ENOENT) 582 return ret; 583 ldo4_en = NULL; 584 } 585 586 /* Disable to go to ship-mode */ 587 ret = regmap_update_bits(regmap, BD71815_REG_PWRCTRL, RESTARTEN, 0); 588 if (ret) 589 return ret; 590 591 config.dev = pdev->dev.parent; 592 config.regmap = regmap; 593 594 for (i = 0; i < BD71815_REGULATOR_CNT; i++) { 595 const struct regulator_desc *desc; 596 struct regulator_dev *rdev; 597 598 desc = &bd71815_regulators[i].desc; 599 600 if (i == BD71815_LDO4) 601 config.ena_gpiod = ldo4_en; 602 else 603 config.ena_gpiod = NULL; 604 605 rdev = devm_regulator_register(&pdev->dev, desc, &config); 606 if (IS_ERR(rdev)) { 607 dev_err(&pdev->dev, 608 "failed to register %s regulator\n", 609 desc->name); 610 return PTR_ERR(rdev); 611 } 612 } 613 return 0; 614 } 615 616 static const struct platform_device_id bd7181x_pmic_id[] = { 617 { "bd71815-pmic", ROHM_CHIP_TYPE_BD71815 }, 618 { }, 619 }; 620 MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id); 621 622 static struct platform_driver bd7181x_regulator = { 623 .driver = { 624 .name = "bd7181x-pmic", 625 }, 626 .probe = bd7181x_probe, 627 .id_table = bd7181x_pmic_id, 628 }; 629 module_platform_driver(bd7181x_regulator); 630 631 MODULE_AUTHOR("Tony Luo <luofc@embedinfo.com>"); 632 MODULE_DESCRIPTION("BD71815 voltage regulator driver"); 633 MODULE_LICENSE("GPL v2"); 634 MODULE_ALIAS("platform:bd7181x-pmic"); 635