1// SPDX-License-Identifier: GPL-2.0 2/* 3 * Copyright (C) 2018 Samsung Electronics 4 * Jaehoon Chung <jh80.chung@samsung.com> 5 */ 6 7#include <common.h> 8#include <fdtdec.h> 9#include <errno.h> 10#include <dm.h> 11#include <linux/delay.h> 12#include <linux/printk.h> 13#include <power/pmic.h> 14#include <power/regulator.h> 15#include <power/s2mps11.h> 16 17#define MODE(_id, _val, _name) { \ 18 .id = _id, \ 19 .register_value = _val, \ 20 .name = _name, \ 21} 22 23/* BUCK : 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 */ 24static struct dm_regulator_mode s2mps11_buck_modes[] = { 25 MODE(OP_OFF, S2MPS11_BUCK_MODE_OFF, "OFF"), 26 MODE(OP_STANDBY, S2MPS11_BUCK_MODE_STANDBY, "ON/OFF"), 27 MODE(OP_ON, S2MPS11_BUCK_MODE_STANDBY, "ON"), 28}; 29 30static struct dm_regulator_mode s2mps11_ldo_modes[] = { 31 MODE(OP_OFF, S2MPS11_LDO_MODE_OFF, "OFF"), 32 MODE(OP_STANDBY, S2MPS11_LDO_MODE_STANDBY, "ON/OFF"), 33 MODE(OP_STANDBY_LPM, S2MPS11_LDO_MODE_STANDBY_LPM, "ON/LPM"), 34 MODE(OP_ON, S2MPS11_LDO_MODE_ON, "ON"), 35}; 36 37static const char s2mps11_buck_ctrl[] = { 38 0xff, 0x25, 0x27, 0x29, 0x2b, 0x2d, 0x33, 0x35, 0x37, 0x39, 0x3b 39}; 40 41static const char s2mps11_buck_out[] = { 42 0xff, 0x26, 0x28, 0x2a, 0x2c, 0x2f, 0x34, 0x36, 0x38, 0x3a, 0x3c 43}; 44 45static int s2mps11_buck_hex2volt(int buck, int hex) 46{ 47 unsigned int uV = 0; 48 49 if (hex < 0) 50 goto bad; 51 52 switch (buck) { 53 case 7: 54 case 8: 55 case 10: 56 if (hex > S2MPS11_BUCK7_8_10_VOLT_MAX_HEX) 57 goto bad; 58 59 uV = hex * S2MPS11_BUCK_HSTEP + S2MPS11_BUCK_UV_HMIN; 60 break; 61 case 9: 62 if (hex > S2MPS11_BUCK9_VOLT_MAX_HEX) 63 goto bad; 64 uV = hex * S2MPS11_BUCK9_STEP * 2 + S2MPS11_BUCK9_UV_MIN; 65 break; 66 default: 67 if (buck == 5 && hex > S2MPS11_BUCK5_VOLT_MAX_HEX) 68 goto bad; 69 else if (buck != 5 && hex > S2MPS11_BUCK_VOLT_MAX_HEX) 70 goto bad; 71 72 uV = hex * S2MPS11_BUCK_LSTEP + S2MPS11_BUCK_UV_MIN; 73 break; 74 } 75 76 return uV; 77bad: 78 pr_err("Value: %#x is wrong for BUCK%d", hex, buck); 79 return -EINVAL; 80} 81 82static int s2mps11_buck_volt2hex(int buck, int uV) 83{ 84 int hex; 85 86 switch (buck) { 87 case 7: 88 case 8: 89 case 10: 90 hex = (uV - S2MPS11_BUCK_UV_HMIN) / S2MPS11_BUCK_HSTEP; 91 if (hex > S2MPS11_BUCK7_8_10_VOLT_MAX_HEX) 92 goto bad; 93 94 break; 95 case 9: 96 hex = (uV - S2MPS11_BUCK9_UV_MIN) / S2MPS11_BUCK9_STEP; 97 if (hex > S2MPS11_BUCK9_VOLT_MAX_HEX) 98 goto bad; 99 break; 100 default: 101 hex = (uV - S2MPS11_BUCK_UV_MIN) / S2MPS11_BUCK_LSTEP; 102 if (buck == 5 && hex > S2MPS11_BUCK5_VOLT_MAX_HEX) 103 goto bad; 104 else if (buck != 5 && hex > S2MPS11_BUCK_VOLT_MAX_HEX) 105 goto bad; 106 break; 107 }; 108 109 if (hex >= 0) 110 return hex; 111 112bad: 113 pr_err("Value: %d uV is wrong for BUCK%d", uV, buck); 114 return -EINVAL; 115} 116 117static int s2mps11_buck_val(struct udevice *dev, int op, int *uV) 118{ 119 int hex, buck, ret; 120 u32 mask, addr; 121 u8 val; 122 123 buck = dev->driver_data; 124 if (buck < 1 || buck > S2MPS11_BUCK_NUM) { 125 pr_err("Wrong buck number: %d\n", buck); 126 return -EINVAL; 127 } 128 129 if (op == PMIC_OP_GET) 130 *uV = 0; 131 132 addr = s2mps11_buck_out[buck]; 133 134 switch (buck) { 135 case 9: 136 mask = S2MPS11_BUCK9_VOLT_MASK; 137 break; 138 default: 139 mask = S2MPS11_BUCK_VOLT_MASK; 140 break; 141 } 142 143 ret = pmic_read(dev->parent, addr, &val, 1); 144 if (ret) 145 return ret; 146 147 if (op == PMIC_OP_GET) { 148 val &= mask; 149 ret = s2mps11_buck_hex2volt(buck, val); 150 if (ret < 0) 151 return ret; 152 *uV = ret; 153 return 0; 154 } 155 156 hex = s2mps11_buck_volt2hex(buck, *uV); 157 if (hex < 0) 158 return hex; 159 160 val &= ~mask; 161 val |= hex; 162 ret = pmic_write(dev->parent, addr, &val, 1); 163 164 return ret; 165} 166 167static int s2mps11_buck_mode(struct udevice *dev, int op, int *opmode) 168{ 169 unsigned int addr, mode; 170 unsigned char val; 171 int buck, ret; 172 173 buck = dev->driver_data; 174 if (buck < 1 || buck > S2MPS11_BUCK_NUM) { 175 pr_err("Wrong buck number: %d\n", buck); 176 return -EINVAL; 177 } 178 179 addr = s2mps11_buck_ctrl[buck]; 180 181 ret = pmic_read(dev->parent, addr, &val, 1); 182 if (ret) 183 return ret; 184 185 if (op == PMIC_OP_GET) { 186 val &= (S2MPS11_BUCK_MODE_MASK << S2MPS11_BUCK_MODE_SHIFT); 187 switch (val) { 188 case S2MPS11_BUCK_MODE_OFF: 189 *opmode = OP_OFF; 190 break; 191 case S2MPS11_BUCK_MODE_STANDBY: 192 *opmode = OP_STANDBY; 193 break; 194 case S2MPS11_BUCK_MODE_ON: 195 *opmode = OP_ON; 196 break; 197 default: 198 return -EINVAL; 199 } 200 return 0; 201 } 202 203 switch (*opmode) { 204 case OP_OFF: 205 mode = S2MPS11_BUCK_MODE_OFF; 206 break; 207 case OP_STANDBY: 208 mode = S2MPS11_BUCK_MODE_STANDBY; 209 break; 210 case OP_ON: 211 mode = S2MPS11_BUCK_MODE_ON; 212 break; 213 default: 214 pr_err("Wrong mode: %d for buck: %d\n", *opmode, buck); 215 return -EINVAL; 216 } 217 218 val &= ~(S2MPS11_BUCK_MODE_MASK << S2MPS11_BUCK_MODE_SHIFT); 219 val |= mode; 220 ret = pmic_write(dev->parent, addr, &val, 1); 221 222 return ret; 223} 224 225static int s2mps11_buck_enable(struct udevice *dev, int op, bool *enable) 226{ 227 int ret, on_off; 228 229 if (op == PMIC_OP_GET) { 230 ret = s2mps11_buck_mode(dev, op, &on_off); 231 if (ret) 232 return ret; 233 switch (on_off) { 234 case OP_OFF: 235 *enable = false; 236 break; 237 case OP_ON: 238 *enable = true; 239 break; 240 default: 241 return -EINVAL; 242 } 243 } else if (op == PMIC_OP_SET) { 244 if (*enable) 245 on_off = OP_ON; 246 else 247 on_off = OP_OFF; 248 249 ret = s2mps11_buck_mode(dev, op, &on_off); 250 if (ret) 251 return ret; 252 } 253 254 return 0; 255} 256 257static int buck_get_value(struct udevice *dev) 258{ 259 int uV; 260 int ret; 261 262 ret = s2mps11_buck_val(dev, PMIC_OP_GET, &uV); 263 if (ret) 264 return ret; 265 return uV; 266} 267 268static int buck_set_value(struct udevice *dev, int uV) 269{ 270 return s2mps11_buck_val(dev, PMIC_OP_SET, &uV); 271} 272 273static int buck_get_enable(struct udevice *dev) 274{ 275 bool enable = false; 276 int ret; 277 278 ret = s2mps11_buck_enable(dev, PMIC_OP_GET, &enable); 279 if (ret) 280 return ret; 281 return enable; 282} 283 284static int buck_set_enable(struct udevice *dev, bool enable) 285{ 286 return s2mps11_buck_enable(dev, PMIC_OP_SET, &enable); 287} 288 289static int buck_get_mode(struct udevice *dev) 290{ 291 int mode; 292 int ret; 293 294 ret = s2mps11_buck_mode(dev, PMIC_OP_GET, &mode); 295 if (ret) 296 return ret; 297 298 return mode; 299} 300 301static int buck_set_mode(struct udevice *dev, int mode) 302{ 303 return s2mps11_buck_mode(dev, PMIC_OP_SET, &mode); 304} 305 306static int s2mps11_buck_probe(struct udevice *dev) 307{ 308 struct dm_regulator_uclass_plat *uc_pdata; 309 310 uc_pdata = dev_get_uclass_plat(dev); 311 312 uc_pdata->type = REGULATOR_TYPE_BUCK; 313 uc_pdata->mode = s2mps11_buck_modes; 314 uc_pdata->mode_count = ARRAY_SIZE(s2mps11_buck_modes); 315 316 return 0; 317} 318 319static const struct dm_regulator_ops s2mps11_buck_ops = { 320 .get_value = buck_get_value, 321 .set_value = buck_set_value, 322 .get_enable = buck_get_enable, 323 .set_enable = buck_set_enable, 324 .get_mode = buck_get_mode, 325 .set_mode = buck_set_mode, 326}; 327 328U_BOOT_DRIVER(s2mps11_buck) = { 329 .name = S2MPS11_BUCK_DRIVER, 330 .id = UCLASS_REGULATOR, 331 .ops = &s2mps11_buck_ops, 332 .probe = s2mps11_buck_probe, 333}; 334 335static int s2mps11_ldo_hex2volt(int ldo, int hex) 336{ 337 unsigned int uV = 0; 338 339 if (hex > S2MPS11_LDO_VOLT_MAX_HEX) { 340 pr_err("Value: %#x is wrong for LDO%d", hex, ldo); 341 return -EINVAL; 342 } 343 344 switch (ldo) { 345 case 1: 346 case 6: 347 case 11: 348 case 22: 349 case 23: 350 case 27: 351 case 35: 352 uV = hex * S2MPS11_LDO_STEP + S2MPS11_LDO_UV_MIN; 353 break; 354 default: 355 uV = hex * S2MPS11_LDO_STEP * 2 + S2MPS11_LDO_UV_MIN; 356 break; 357 } 358 359 return uV; 360} 361 362static int s2mps11_ldo_volt2hex(int ldo, int uV) 363{ 364 int hex = 0; 365 366 switch (ldo) { 367 case 1: 368 case 6: 369 case 11: 370 case 22: 371 case 23: 372 case 27: 373 case 35: 374 hex = (uV - S2MPS11_LDO_UV_MIN) / S2MPS11_LDO_STEP; 375 break; 376 default: 377 hex = (uV - S2MPS11_LDO_UV_MIN) / (S2MPS11_LDO_STEP * 2); 378 break; 379 } 380 381 if (hex >= 0 && hex <= S2MPS11_LDO_VOLT_MAX_HEX) 382 return hex; 383 384 pr_err("Value: %d uV is wrong for LDO%d", uV, ldo); 385 return -EINVAL; 386 387 return 0; 388} 389 390static int s2mps11_ldo_val(struct udevice *dev, int op, int *uV) 391{ 392 unsigned int addr; 393 unsigned char val; 394 int hex, ldo, ret; 395 396 ldo = dev->driver_data; 397 if (ldo < 1 || ldo > S2MPS11_LDO_NUM) { 398 pr_err("Wrong ldo number: %d\n", ldo); 399 return -EINVAL; 400 } 401 402 addr = S2MPS11_REG_L1CTRL + ldo - 1; 403 404 ret = pmic_read(dev->parent, addr, &val, 1); 405 if (ret) 406 return ret; 407 408 if (op == PMIC_OP_GET) { 409 *uV = 0; 410 val &= S2MPS11_LDO_VOLT_MASK; 411 ret = s2mps11_ldo_hex2volt(ldo, val); 412 if (ret < 0) 413 return ret; 414 415 *uV = ret; 416 return 0; 417 } 418 419 hex = s2mps11_ldo_volt2hex(ldo, *uV); 420 if (hex < 0) 421 return hex; 422 423 val &= ~S2MPS11_LDO_VOLT_MASK; 424 val |= hex; 425 ret = pmic_write(dev->parent, addr, &val, 1); 426 427 return ret; 428} 429 430static int s2mps11_ldo_mode(struct udevice *dev, int op, int *opmode) 431{ 432 unsigned int addr, mode; 433 unsigned char val; 434 int ldo, ret; 435 436 ldo = dev->driver_data; 437 if (ldo < 1 || ldo > S2MPS11_LDO_NUM) { 438 pr_err("Wrong ldo number: %d\n", ldo); 439 return -EINVAL; 440 } 441 addr = S2MPS11_REG_L1CTRL + ldo - 1; 442 443 ret = pmic_read(dev->parent, addr, &val, 1); 444 if (ret) 445 return ret; 446 447 if (op == PMIC_OP_GET) { 448 val &= (S2MPS11_LDO_MODE_MASK << S2MPS11_LDO_MODE_SHIFT); 449 switch (val) { 450 case S2MPS11_LDO_MODE_OFF: 451 *opmode = OP_OFF; 452 break; 453 case S2MPS11_LDO_MODE_STANDBY: 454 *opmode = OP_STANDBY; 455 break; 456 case S2MPS11_LDO_MODE_STANDBY_LPM: 457 *opmode = OP_STANDBY_LPM; 458 break; 459 case S2MPS11_LDO_MODE_ON: 460 *opmode = OP_ON; 461 break; 462 default: 463 return -EINVAL; 464 } 465 return 0; 466 } 467 468 switch (*opmode) { 469 case OP_OFF: 470 mode = S2MPS11_LDO_MODE_OFF; 471 break; 472 case OP_STANDBY: 473 mode = S2MPS11_LDO_MODE_STANDBY; 474 break; 475 case OP_STANDBY_LPM: 476 mode = S2MPS11_LDO_MODE_STANDBY_LPM; 477 break; 478 case OP_ON: 479 mode = S2MPS11_LDO_MODE_ON; 480 break; 481 default: 482 pr_err("Wrong mode: %d for ldo: %d\n", *opmode, ldo); 483 return -EINVAL; 484 } 485 486 val &= ~(S2MPS11_LDO_MODE_MASK << S2MPS11_LDO_MODE_SHIFT); 487 val |= mode; 488 ret = pmic_write(dev->parent, addr, &val, 1); 489 490 return ret; 491} 492 493static int s2mps11_ldo_enable(struct udevice *dev, int op, bool *enable) 494{ 495 int ret, on_off; 496 497 if (op == PMIC_OP_GET) { 498 ret = s2mps11_ldo_mode(dev, op, &on_off); 499 if (ret) 500 return ret; 501 switch (on_off) { 502 case OP_OFF: 503 *enable = false; 504 break; 505 case OP_ON: 506 *enable = true; 507 break; 508 default: 509 return -EINVAL; 510 } 511 } else if (op == PMIC_OP_SET) { 512 if (*enable) 513 on_off = OP_ON; 514 else 515 on_off = OP_OFF; 516 517 ret = s2mps11_ldo_mode(dev, op, &on_off); 518 if (ret) 519 return ret; 520 } 521 522 return 0; 523} 524 525static int ldo_get_value(struct udevice *dev) 526{ 527 int uV; 528 int ret; 529 530 ret = s2mps11_ldo_val(dev, PMIC_OP_GET, &uV); 531 if (ret) 532 return ret; 533 534 return uV; 535} 536 537static int ldo_set_value(struct udevice *dev, int uV) 538{ 539 return s2mps11_ldo_val(dev, PMIC_OP_SET, &uV); 540} 541 542static int ldo_get_enable(struct udevice *dev) 543{ 544 bool enable = false; 545 int ret; 546 547 ret = s2mps11_ldo_enable(dev, PMIC_OP_GET, &enable); 548 if (ret) 549 return ret; 550 return enable; 551} 552 553static int ldo_set_enable(struct udevice *dev, bool enable) 554{ 555 int ret; 556 557 ret = s2mps11_ldo_enable(dev, PMIC_OP_SET, &enable); 558 if (ret) 559 return ret; 560 561 /* Wait the "enable delay" for voltage to start to rise */ 562 udelay(15); 563 564 return 0; 565} 566 567static int ldo_get_mode(struct udevice *dev) 568{ 569 int mode, ret; 570 571 ret = s2mps11_ldo_mode(dev, PMIC_OP_GET, &mode); 572 if (ret) 573 return ret; 574 return mode; 575} 576 577static int ldo_set_mode(struct udevice *dev, int mode) 578{ 579 return s2mps11_ldo_mode(dev, PMIC_OP_SET, &mode); 580} 581 582static int s2mps11_ldo_probe(struct udevice *dev) 583{ 584 struct dm_regulator_uclass_plat *uc_pdata; 585 586 uc_pdata = dev_get_uclass_plat(dev); 587 uc_pdata->type = REGULATOR_TYPE_LDO; 588 uc_pdata->mode = s2mps11_ldo_modes; 589 uc_pdata->mode_count = ARRAY_SIZE(s2mps11_ldo_modes); 590 591 return 0; 592} 593 594static const struct dm_regulator_ops s2mps11_ldo_ops = { 595 .get_value = ldo_get_value, 596 .set_value = ldo_set_value, 597 .get_enable = ldo_get_enable, 598 .set_enable = ldo_set_enable, 599 .get_mode = ldo_get_mode, 600 .set_mode = ldo_set_mode, 601}; 602 603U_BOOT_DRIVER(s2mps11_ldo) = { 604 .name = S2MPS11_LDO_DRIVER, 605 .id = UCLASS_REGULATOR, 606 .ops = &s2mps11_ldo_ops, 607 .probe = s2mps11_ldo_probe, 608}; 609