1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Maxim MAX77620 MFD Driver 4 * 5 * Copyright (C) 2016 NVIDIA CORPORATION. All rights reserved. 6 * 7 * Author: 8 * Laxman Dewangan <ldewangan@nvidia.com> 9 * Chaitanya Bandi <bandik@nvidia.com> 10 * Mallikarjun Kasoju <mkasoju@nvidia.com> 11 */ 12 13 /****************** Teminology used in driver ******************** 14 * Here are some terminology used from datasheet for quick reference: 15 * Flexible Power Sequence (FPS): 16 * The Flexible Power Sequencer (FPS) allows each regulator to power up under 17 * hardware or software control. Additionally, each regulator can power on 18 * independently or among a group of other regulators with an adjustable 19 * power-up and power-down delays (sequencing). GPIO1, GPIO2, and GPIO3 can 20 * be programmed to be part of a sequence allowing external regulators to be 21 * sequenced along with internal regulators. 32KHz clock can be programmed to 22 * be part of a sequence. 23 * There is 3 FPS confguration registers and all resources are configured to 24 * any of these FPS or no FPS. 25 */ 26 27 #include <linux/i2c.h> 28 #include <linux/interrupt.h> 29 #include <linux/mfd/core.h> 30 #include <linux/mfd/max77620.h> 31 #include <linux/init.h> 32 #include <linux/of.h> 33 #include <linux/regmap.h> 34 #include <linux/slab.h> 35 36 static struct max77620_chip *max77620_scratch; 37 38 static const struct resource gpio_resources[] = { 39 DEFINE_RES_IRQ(MAX77620_IRQ_TOP_GPIO), 40 }; 41 42 static const struct resource power_resources[] = { 43 DEFINE_RES_IRQ(MAX77620_IRQ_LBT_MBATLOW), 44 }; 45 46 static const struct resource rtc_resources[] = { 47 DEFINE_RES_IRQ(MAX77620_IRQ_TOP_RTC), 48 }; 49 50 static const struct resource thermal_resources[] = { 51 DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM1), 52 DEFINE_RES_IRQ(MAX77620_IRQ_LBT_TJALRM2), 53 }; 54 55 static const struct regmap_irq max77620_top_irqs[] = { 56 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_GLBL, 0, MAX77620_IRQ_TOP_GLBL_MASK), 57 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_SD, 0, MAX77620_IRQ_TOP_SD_MASK), 58 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_LDO, 0, MAX77620_IRQ_TOP_LDO_MASK), 59 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_GPIO, 0, MAX77620_IRQ_TOP_GPIO_MASK), 60 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_RTC, 0, MAX77620_IRQ_TOP_RTC_MASK), 61 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_32K, 0, MAX77620_IRQ_TOP_32K_MASK), 62 REGMAP_IRQ_REG(MAX77620_IRQ_TOP_ONOFF, 0, MAX77620_IRQ_TOP_ONOFF_MASK), 63 REGMAP_IRQ_REG(MAX77620_IRQ_LBT_MBATLOW, 1, MAX77620_IRQ_LBM_MASK), 64 REGMAP_IRQ_REG(MAX77620_IRQ_LBT_TJALRM1, 1, MAX77620_IRQ_TJALRM1_MASK), 65 REGMAP_IRQ_REG(MAX77620_IRQ_LBT_TJALRM2, 1, MAX77620_IRQ_TJALRM2_MASK), 66 }; 67 68 static const struct mfd_cell max77620_children[] = { 69 { .name = "max77620-pinctrl", }, 70 { .name = "max77620-clock", }, 71 { .name = "max77620-pmic", }, 72 { .name = "max77620-watchdog", }, 73 { 74 .name = "max77620-gpio", 75 .resources = gpio_resources, 76 .num_resources = ARRAY_SIZE(gpio_resources), 77 }, { 78 .name = "max77620-rtc", 79 .resources = rtc_resources, 80 .num_resources = ARRAY_SIZE(rtc_resources), 81 }, { 82 .name = "max77620-power", 83 .resources = power_resources, 84 .num_resources = ARRAY_SIZE(power_resources), 85 }, { 86 .name = "max77620-thermal", 87 .resources = thermal_resources, 88 .num_resources = ARRAY_SIZE(thermal_resources), 89 }, 90 }; 91 92 static const struct mfd_cell max20024_children[] = { 93 { .name = "max20024-pinctrl", }, 94 { .name = "max77620-clock", }, 95 { .name = "max20024-pmic", }, 96 { .name = "max77620-watchdog", }, 97 { 98 .name = "max77620-gpio", 99 .resources = gpio_resources, 100 .num_resources = ARRAY_SIZE(gpio_resources), 101 }, { 102 .name = "max77620-rtc", 103 .resources = rtc_resources, 104 .num_resources = ARRAY_SIZE(rtc_resources), 105 }, { 106 .name = "max20024-power", 107 .resources = power_resources, 108 .num_resources = ARRAY_SIZE(power_resources), 109 }, 110 }; 111 112 static const struct mfd_cell max77663_children[] = { 113 { .name = "max77620-pinctrl", }, 114 { .name = "max77620-clock", }, 115 { .name = "max77663-pmic", }, 116 { .name = "max77620-watchdog", }, 117 { 118 .name = "max77620-gpio", 119 .resources = gpio_resources, 120 .num_resources = ARRAY_SIZE(gpio_resources), 121 }, { 122 .name = "max77620-rtc", 123 .resources = rtc_resources, 124 .num_resources = ARRAY_SIZE(rtc_resources), 125 }, { 126 .name = "max77663-power", 127 .resources = power_resources, 128 .num_resources = ARRAY_SIZE(power_resources), 129 }, 130 }; 131 132 static const struct regmap_range max77620_readable_ranges[] = { 133 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4), 134 }; 135 136 static const struct regmap_access_table max77620_readable_table = { 137 .yes_ranges = max77620_readable_ranges, 138 .n_yes_ranges = ARRAY_SIZE(max77620_readable_ranges), 139 }; 140 141 static const struct regmap_range max20024_readable_ranges[] = { 142 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4), 143 regmap_reg_range(MAX20024_REG_MAX_ADD, MAX20024_REG_MAX_ADD), 144 }; 145 146 static const struct regmap_access_table max20024_readable_table = { 147 .yes_ranges = max20024_readable_ranges, 148 .n_yes_ranges = ARRAY_SIZE(max20024_readable_ranges), 149 }; 150 151 static const struct regmap_range max77620_writable_ranges[] = { 152 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_DVSSD4), 153 }; 154 155 static const struct regmap_access_table max77620_writable_table = { 156 .yes_ranges = max77620_writable_ranges, 157 .n_yes_ranges = ARRAY_SIZE(max77620_writable_ranges), 158 }; 159 160 static const struct regmap_range max77620_cacheable_ranges[] = { 161 regmap_reg_range(MAX77620_REG_SD0_CFG, MAX77620_REG_LDO_CFG3), 162 regmap_reg_range(MAX77620_REG_FPS_CFG0, MAX77620_REG_FPS_SD3), 163 }; 164 165 static const struct regmap_access_table max77620_volatile_table = { 166 .no_ranges = max77620_cacheable_ranges, 167 .n_no_ranges = ARRAY_SIZE(max77620_cacheable_ranges), 168 }; 169 170 static const struct regmap_config max77620_regmap_config = { 171 .name = "power-slave", 172 .reg_bits = 8, 173 .val_bits = 8, 174 .max_register = MAX77620_REG_DVSSD4 + 1, 175 .cache_type = REGCACHE_RBTREE, 176 .rd_table = &max77620_readable_table, 177 .wr_table = &max77620_writable_table, 178 .volatile_table = &max77620_volatile_table, 179 .use_single_write = true, 180 }; 181 182 static const struct regmap_config max20024_regmap_config = { 183 .name = "power-slave", 184 .reg_bits = 8, 185 .val_bits = 8, 186 .max_register = MAX20024_REG_MAX_ADD + 1, 187 .cache_type = REGCACHE_RBTREE, 188 .rd_table = &max20024_readable_table, 189 .wr_table = &max77620_writable_table, 190 .volatile_table = &max77620_volatile_table, 191 }; 192 193 static const struct regmap_range max77663_readable_ranges[] = { 194 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5), 195 }; 196 197 static const struct regmap_access_table max77663_readable_table = { 198 .yes_ranges = max77663_readable_ranges, 199 .n_yes_ranges = ARRAY_SIZE(max77663_readable_ranges), 200 }; 201 202 static const struct regmap_range max77663_writable_ranges[] = { 203 regmap_reg_range(MAX77620_REG_CNFGGLBL1, MAX77620_REG_CID5), 204 }; 205 206 static const struct regmap_access_table max77663_writable_table = { 207 .yes_ranges = max77663_writable_ranges, 208 .n_yes_ranges = ARRAY_SIZE(max77663_writable_ranges), 209 }; 210 211 static const struct regmap_config max77663_regmap_config = { 212 .name = "power-slave", 213 .reg_bits = 8, 214 .val_bits = 8, 215 .max_register = MAX77620_REG_CID5 + 1, 216 .cache_type = REGCACHE_RBTREE, 217 .rd_table = &max77663_readable_table, 218 .wr_table = &max77663_writable_table, 219 .volatile_table = &max77620_volatile_table, 220 }; 221 222 /* 223 * MAX77620 and MAX20024 has the following steps of the interrupt handling 224 * for TOP interrupts: 225 * 1. When interrupt occurs from PMIC, mask the PMIC interrupt by setting GLBLM. 226 * 2. Read IRQTOP and service the interrupt. 227 * 3. Once all interrupts has been checked and serviced, the interrupt service 228 * routine un-masks the hardware interrupt line by clearing GLBLM. 229 */ 230 static int max77620_irq_global_mask(void *irq_drv_data) 231 { 232 struct max77620_chip *chip = irq_drv_data; 233 int ret; 234 235 ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT, 236 MAX77620_GLBLM_MASK, MAX77620_GLBLM_MASK); 237 if (ret < 0) 238 dev_err(chip->dev, "Failed to set GLBLM: %d\n", ret); 239 240 return ret; 241 } 242 243 static int max77620_irq_global_unmask(void *irq_drv_data) 244 { 245 struct max77620_chip *chip = irq_drv_data; 246 int ret; 247 248 ret = regmap_update_bits(chip->rmap, MAX77620_REG_INTENLBT, 249 MAX77620_GLBLM_MASK, 0); 250 if (ret < 0) 251 dev_err(chip->dev, "Failed to reset GLBLM: %d\n", ret); 252 253 return ret; 254 } 255 256 static struct regmap_irq_chip max77620_top_irq_chip = { 257 .name = "max77620-top", 258 .irqs = max77620_top_irqs, 259 .num_irqs = ARRAY_SIZE(max77620_top_irqs), 260 .num_regs = 2, 261 .status_base = MAX77620_REG_IRQTOP, 262 .mask_base = MAX77620_REG_IRQTOPM, 263 .handle_pre_irq = max77620_irq_global_mask, 264 .handle_post_irq = max77620_irq_global_unmask, 265 }; 266 267 /* max77620_get_fps_period_reg_value: Get FPS bit field value from 268 * requested periods. 269 * MAX77620 supports the FPS period of 40, 80, 160, 320, 540, 1280, 2560 270 * and 5120 microseconds. MAX20024 supports the FPS period of 20, 40, 80, 271 * 160, 320, 540, 1280 and 2560 microseconds. 272 * The FPS register has 3 bits field to set the FPS period as 273 * bits max77620 max20024 274 * 000 40 20 275 * 001 80 40 276 * ::: 277 */ 278 static int max77620_get_fps_period_reg_value(struct max77620_chip *chip, 279 int tperiod) 280 { 281 int fps_min_period; 282 int i; 283 284 switch (chip->chip_id) { 285 case MAX20024: 286 fps_min_period = MAX20024_FPS_PERIOD_MIN_US; 287 break; 288 case MAX77620: 289 fps_min_period = MAX77620_FPS_PERIOD_MIN_US; 290 break; 291 case MAX77663: 292 fps_min_period = MAX20024_FPS_PERIOD_MIN_US; 293 break; 294 default: 295 return -EINVAL; 296 } 297 298 for (i = 0; i < 7; i++) { 299 if (fps_min_period >= tperiod) 300 return i; 301 fps_min_period *= 2; 302 } 303 304 return i; 305 } 306 307 /* max77620_config_fps: Configure FPS configuration registers 308 * based on platform specific information. 309 */ 310 static int max77620_config_fps(struct max77620_chip *chip, 311 struct device_node *fps_np) 312 { 313 struct device *dev = chip->dev; 314 unsigned int mask = 0, config = 0; 315 u32 fps_max_period; 316 u32 param_val; 317 int tperiod, fps_id; 318 int ret; 319 char fps_name[10]; 320 321 switch (chip->chip_id) { 322 case MAX20024: 323 fps_max_period = MAX20024_FPS_PERIOD_MAX_US; 324 break; 325 case MAX77620: 326 fps_max_period = MAX77620_FPS_PERIOD_MAX_US; 327 break; 328 case MAX77663: 329 fps_max_period = MAX20024_FPS_PERIOD_MAX_US; 330 break; 331 default: 332 return -EINVAL; 333 } 334 335 for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) { 336 sprintf(fps_name, "fps%d", fps_id); 337 if (of_node_name_eq(fps_np, fps_name)) 338 break; 339 } 340 341 if (fps_id == MAX77620_FPS_COUNT) { 342 dev_err(dev, "FPS node name %pOFn is not valid\n", fps_np); 343 return -EINVAL; 344 } 345 346 ret = of_property_read_u32(fps_np, "maxim,shutdown-fps-time-period-us", 347 ¶m_val); 348 if (!ret) { 349 mask |= MAX77620_FPS_TIME_PERIOD_MASK; 350 chip->shutdown_fps_period[fps_id] = min(param_val, 351 fps_max_period); 352 tperiod = max77620_get_fps_period_reg_value(chip, 353 chip->shutdown_fps_period[fps_id]); 354 config |= tperiod << MAX77620_FPS_TIME_PERIOD_SHIFT; 355 } 356 357 ret = of_property_read_u32(fps_np, "maxim,suspend-fps-time-period-us", 358 ¶m_val); 359 if (!ret) 360 chip->suspend_fps_period[fps_id] = min(param_val, 361 fps_max_period); 362 363 ret = of_property_read_u32(fps_np, "maxim,fps-event-source", 364 ¶m_val); 365 if (!ret) { 366 if (param_val > 2) { 367 dev_err(dev, "FPS%d event-source invalid\n", fps_id); 368 return -EINVAL; 369 } 370 mask |= MAX77620_FPS_EN_SRC_MASK; 371 config |= param_val << MAX77620_FPS_EN_SRC_SHIFT; 372 if (param_val == 2) { 373 mask |= MAX77620_FPS_ENFPS_SW_MASK; 374 config |= MAX77620_FPS_ENFPS_SW; 375 } 376 } 377 378 if (!chip->sleep_enable && !chip->enable_global_lpm) { 379 ret = of_property_read_u32(fps_np, 380 "maxim,device-state-on-disabled-event", 381 ¶m_val); 382 if (!ret) { 383 if (param_val == 0) 384 chip->sleep_enable = true; 385 else if (param_val == 1) 386 chip->enable_global_lpm = true; 387 } 388 } 389 390 ret = regmap_update_bits(chip->rmap, MAX77620_REG_FPS_CFG0 + fps_id, 391 mask, config); 392 if (ret < 0) { 393 dev_err(dev, "Failed to update FPS CFG: %d\n", ret); 394 return ret; 395 } 396 397 return 0; 398 } 399 400 static int max77620_initialise_fps(struct max77620_chip *chip) 401 { 402 struct device *dev = chip->dev; 403 struct device_node *fps_np, *fps_child; 404 u8 config; 405 int fps_id; 406 int ret; 407 408 for (fps_id = 0; fps_id < MAX77620_FPS_COUNT; fps_id++) { 409 chip->shutdown_fps_period[fps_id] = -1; 410 chip->suspend_fps_period[fps_id] = -1; 411 } 412 413 fps_np = of_get_child_by_name(dev->of_node, "fps"); 414 if (!fps_np) 415 goto skip_fps; 416 417 for_each_child_of_node(fps_np, fps_child) { 418 ret = max77620_config_fps(chip, fps_child); 419 if (ret < 0) { 420 of_node_put(fps_child); 421 of_node_put(fps_np); 422 return ret; 423 } 424 } 425 of_node_put(fps_np); 426 427 config = chip->enable_global_lpm ? MAX77620_ONOFFCNFG2_SLP_LPM_MSK : 0; 428 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, 429 MAX77620_ONOFFCNFG2_SLP_LPM_MSK, config); 430 if (ret < 0) { 431 dev_err(dev, "Failed to update SLP_LPM: %d\n", ret); 432 return ret; 433 } 434 435 skip_fps: 436 if (chip->chip_id == MAX77663) 437 return 0; 438 439 /* Enable wake on EN0 pin */ 440 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, 441 MAX77620_ONOFFCNFG2_WK_EN0, 442 MAX77620_ONOFFCNFG2_WK_EN0); 443 if (ret < 0) { 444 dev_err(dev, "Failed to update WK_EN0: %d\n", ret); 445 return ret; 446 } 447 448 /* For MAX20024, SLPEN will be POR reset if CLRSE is b11 */ 449 if ((chip->chip_id == MAX20024) && chip->sleep_enable) { 450 config = MAX77620_ONOFFCNFG1_SLPEN | MAX20024_ONOFFCNFG1_CLRSE; 451 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1, 452 config, config); 453 if (ret < 0) { 454 dev_err(dev, "Failed to update SLPEN: %d\n", ret); 455 return ret; 456 } 457 } 458 459 return 0; 460 } 461 462 static int max77620_read_es_version(struct max77620_chip *chip) 463 { 464 unsigned int val; 465 u8 cid_val[6]; 466 int i; 467 int ret; 468 469 for (i = MAX77620_REG_CID0; i <= MAX77620_REG_CID5; i++) { 470 ret = regmap_read(chip->rmap, i, &val); 471 if (ret < 0) { 472 dev_err(chip->dev, "Failed to read CID: %d\n", ret); 473 return ret; 474 } 475 dev_dbg(chip->dev, "CID%d: 0x%02x\n", 476 i - MAX77620_REG_CID0, val); 477 cid_val[i - MAX77620_REG_CID0] = val; 478 } 479 480 /* CID4 is OTP Version and CID5 is ES version */ 481 dev_info(chip->dev, "PMIC Version OTP:0x%02X and ES:0x%X\n", 482 cid_val[4], MAX77620_CID5_DIDM(cid_val[5])); 483 484 return ret; 485 } 486 487 static void max77620_pm_power_off(void) 488 { 489 struct max77620_chip *chip = max77620_scratch; 490 491 regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1, 492 MAX77620_ONOFFCNFG1_SFT_RST, 493 MAX77620_ONOFFCNFG1_SFT_RST); 494 } 495 496 static int max77620_probe(struct i2c_client *client) 497 { 498 const struct i2c_device_id *id = i2c_client_get_device_id(client); 499 const struct regmap_config *rmap_config; 500 struct max77620_chip *chip; 501 const struct mfd_cell *mfd_cells; 502 int n_mfd_cells; 503 bool pm_off; 504 int ret; 505 506 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); 507 if (!chip) 508 return -ENOMEM; 509 510 i2c_set_clientdata(client, chip); 511 chip->dev = &client->dev; 512 chip->chip_irq = client->irq; 513 chip->chip_id = (enum max77620_chip_id)id->driver_data; 514 515 switch (chip->chip_id) { 516 case MAX77620: 517 mfd_cells = max77620_children; 518 n_mfd_cells = ARRAY_SIZE(max77620_children); 519 rmap_config = &max77620_regmap_config; 520 break; 521 case MAX20024: 522 mfd_cells = max20024_children; 523 n_mfd_cells = ARRAY_SIZE(max20024_children); 524 rmap_config = &max20024_regmap_config; 525 break; 526 case MAX77663: 527 mfd_cells = max77663_children; 528 n_mfd_cells = ARRAY_SIZE(max77663_children); 529 rmap_config = &max77663_regmap_config; 530 break; 531 default: 532 dev_err(chip->dev, "ChipID is invalid %d\n", chip->chip_id); 533 return -EINVAL; 534 } 535 536 chip->rmap = devm_regmap_init_i2c(client, rmap_config); 537 if (IS_ERR(chip->rmap)) { 538 ret = PTR_ERR(chip->rmap); 539 dev_err(chip->dev, "Failed to initialise regmap: %d\n", ret); 540 return ret; 541 } 542 543 ret = max77620_read_es_version(chip); 544 if (ret < 0) 545 return ret; 546 547 max77620_top_irq_chip.irq_drv_data = chip; 548 ret = devm_regmap_add_irq_chip(chip->dev, chip->rmap, client->irq, 549 IRQF_ONESHOT | IRQF_SHARED, 0, 550 &max77620_top_irq_chip, 551 &chip->top_irq_data); 552 if (ret < 0) { 553 dev_err(chip->dev, "Failed to add regmap irq: %d\n", ret); 554 return ret; 555 } 556 557 ret = max77620_initialise_fps(chip); 558 if (ret < 0) 559 return ret; 560 561 ret = devm_mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, 562 mfd_cells, n_mfd_cells, NULL, 0, 563 regmap_irq_get_domain(chip->top_irq_data)); 564 if (ret < 0) { 565 dev_err(chip->dev, "Failed to add MFD children: %d\n", ret); 566 return ret; 567 } 568 569 pm_off = of_device_is_system_power_controller(client->dev.of_node); 570 if (pm_off && !pm_power_off) { 571 max77620_scratch = chip; 572 pm_power_off = max77620_pm_power_off; 573 } 574 575 return 0; 576 } 577 578 static int max77620_set_fps_period(struct max77620_chip *chip, 579 int fps_id, int time_period) 580 { 581 int period = max77620_get_fps_period_reg_value(chip, time_period); 582 int ret; 583 584 ret = regmap_update_bits(chip->rmap, MAX77620_REG_FPS_CFG0 + fps_id, 585 MAX77620_FPS_TIME_PERIOD_MASK, 586 period << MAX77620_FPS_TIME_PERIOD_SHIFT); 587 if (ret < 0) { 588 dev_err(chip->dev, "Failed to update FPS period: %d\n", ret); 589 return ret; 590 } 591 592 return 0; 593 } 594 595 static int max77620_i2c_suspend(struct device *dev) 596 { 597 struct max77620_chip *chip = dev_get_drvdata(dev); 598 struct i2c_client *client = to_i2c_client(dev); 599 unsigned int config; 600 int fps; 601 int ret; 602 603 for (fps = 0; fps < MAX77620_FPS_COUNT; fps++) { 604 if (chip->suspend_fps_period[fps] < 0) 605 continue; 606 607 ret = max77620_set_fps_period(chip, fps, 608 chip->suspend_fps_period[fps]); 609 if (ret < 0) 610 return ret; 611 } 612 613 /* 614 * For MAX20024: No need to configure SLPEN on suspend as 615 * it will be configured on Init. 616 */ 617 if (chip->chip_id == MAX20024) 618 goto out; 619 620 config = (chip->sleep_enable) ? MAX77620_ONOFFCNFG1_SLPEN : 0; 621 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG1, 622 MAX77620_ONOFFCNFG1_SLPEN, 623 config); 624 if (ret < 0) { 625 dev_err(dev, "Failed to configure sleep in suspend: %d\n", ret); 626 return ret; 627 } 628 629 if (chip->chip_id == MAX77663) 630 goto out; 631 632 /* Disable WK_EN0 */ 633 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, 634 MAX77620_ONOFFCNFG2_WK_EN0, 0); 635 if (ret < 0) { 636 dev_err(dev, "Failed to configure WK_EN in suspend: %d\n", ret); 637 return ret; 638 } 639 640 out: 641 disable_irq(client->irq); 642 643 return 0; 644 } 645 646 static int max77620_i2c_resume(struct device *dev) 647 { 648 struct max77620_chip *chip = dev_get_drvdata(dev); 649 struct i2c_client *client = to_i2c_client(dev); 650 int ret; 651 int fps; 652 653 for (fps = 0; fps < MAX77620_FPS_COUNT; fps++) { 654 if (chip->shutdown_fps_period[fps] < 0) 655 continue; 656 657 ret = max77620_set_fps_period(chip, fps, 658 chip->shutdown_fps_period[fps]); 659 if (ret < 0) 660 return ret; 661 } 662 663 /* 664 * For MAX20024: No need to configure WKEN0 on resume as 665 * it is configured on Init. 666 */ 667 if (chip->chip_id == MAX20024 || chip->chip_id == MAX77663) 668 goto out; 669 670 /* Enable WK_EN0 */ 671 ret = regmap_update_bits(chip->rmap, MAX77620_REG_ONOFFCNFG2, 672 MAX77620_ONOFFCNFG2_WK_EN0, 673 MAX77620_ONOFFCNFG2_WK_EN0); 674 if (ret < 0) { 675 dev_err(dev, "Failed to configure WK_EN0 n resume: %d\n", ret); 676 return ret; 677 } 678 679 out: 680 enable_irq(client->irq); 681 682 return 0; 683 } 684 685 static const struct i2c_device_id max77620_id[] = { 686 {"max77620", MAX77620}, 687 {"max20024", MAX20024}, 688 {"max77663", MAX77663}, 689 {}, 690 }; 691 692 static DEFINE_SIMPLE_DEV_PM_OPS(max77620_pm_ops, 693 max77620_i2c_suspend, max77620_i2c_resume); 694 695 static struct i2c_driver max77620_driver = { 696 .driver = { 697 .name = "max77620", 698 .pm = pm_sleep_ptr(&max77620_pm_ops), 699 }, 700 .probe = max77620_probe, 701 .id_table = max77620_id, 702 }; 703 builtin_i2c_driver(max77620_driver); 704