1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2022 Richtek Technology Corp. 4 * 5 * Author: ChiaEn Wu <chiaen_wu@richtek.com> 6 */ 7 8 #include <linux/bitfield.h> 9 #include <linux/bits.h> 10 #include <linux/devm-helpers.h> 11 #include <linux/gpio/consumer.h> 12 #include <linux/iio/consumer.h> 13 #include <linux/init.h> 14 #include <linux/interrupt.h> 15 #include <linux/kernel.h> 16 #include <linux/linear_range.h> 17 #include <linux/module.h> 18 #include <linux/of.h> 19 #include <linux/platform_device.h> 20 #include <linux/power_supply.h> 21 #include <linux/regmap.h> 22 #include <linux/regulator/driver.h> 23 #include <linux/workqueue.h> 24 25 #define MT6370_REG_CHG_CTRL1 0x111 26 #define MT6370_REG_CHG_CTRL2 0x112 27 #define MT6370_REG_CHG_CTRL3 0x113 28 #define MT6370_REG_CHG_CTRL4 0x114 29 #define MT6370_REG_CHG_CTRL5 0x115 30 #define MT6370_REG_CHG_CTRL6 0x116 31 #define MT6370_REG_CHG_CTRL7 0x117 32 #define MT6370_REG_CHG_CTRL8 0x118 33 #define MT6370_REG_CHG_CTRL9 0x119 34 #define MT6370_REG_CHG_CTRL10 0x11A 35 #define MT6370_REG_DEVICE_TYPE 0x122 36 #define MT6370_REG_USB_STATUS1 0x127 37 #define MT6370_REG_CHG_STAT 0x14A 38 #define MT6370_REG_FLED_EN 0x17E 39 #define MT6370_REG_CHG_STAT1 0X1D0 40 #define MT6370_REG_OVPCTRL_STAT 0x1D8 41 42 #define MT6370_VOBST_MASK GENMASK(7, 2) 43 #define MT6370_OTG_PIN_EN_MASK BIT(1) 44 #define MT6370_OPA_MODE_MASK BIT(0) 45 #define MT6370_OTG_OC_MASK GENMASK(2, 0) 46 47 #define MT6370_MIVR_IBUS_TH_100_mA 100000 48 #define MT6370_ADC_CHAN_IBUS 5 49 #define MT6370_ADC_CHAN_MAX 9 50 51 enum mt6370_chg_reg_field { 52 /* MT6370_REG_CHG_CTRL2 */ 53 F_IINLMTSEL, F_CFO_EN, F_CHG_EN, 54 /* MT6370_REG_CHG_CTRL3 */ 55 F_IAICR, F_AICR_EN, F_ILIM_EN, 56 /* MT6370_REG_CHG_CTRL4 */ 57 F_VOREG, 58 /* MT6370_REG_CHG_CTRL6 */ 59 F_VMIVR, 60 /* MT6370_REG_CHG_CTRL7 */ 61 F_ICHG, 62 /* MT6370_REG_CHG_CTRL8 */ 63 F_IPREC, 64 /* MT6370_REG_CHG_CTRL9 */ 65 F_IEOC, 66 /* MT6370_REG_DEVICE_TYPE */ 67 F_USBCHGEN, 68 /* MT6370_REG_USB_STATUS1 */ 69 F_USB_STAT, F_CHGDET, 70 /* MT6370_REG_CHG_STAT */ 71 F_CHG_STAT, F_BOOST_STAT, F_VBAT_LVL, 72 /* MT6370_REG_FLED_EN */ 73 F_FL_STROBE, 74 /* MT6370_REG_CHG_STAT1 */ 75 F_CHG_MIVR_STAT, 76 /* MT6370_REG_OVPCTRL_STAT */ 77 F_UVP_D_STAT, 78 F_MAX 79 }; 80 81 enum mt6370_irq { 82 MT6370_IRQ_ATTACH_I = 0, 83 MT6370_IRQ_UVP_D_EVT, 84 MT6370_IRQ_MIVR, 85 MT6370_IRQ_MAX 86 }; 87 88 struct mt6370_priv { 89 struct device *dev; 90 struct iio_channel *iio_adcs; 91 struct mutex attach_lock; 92 struct power_supply *psy; 93 struct regmap *regmap; 94 struct regmap_field *rmap_fields[F_MAX]; 95 struct regulator_dev *rdev; 96 struct workqueue_struct *wq; 97 struct work_struct bc12_work; 98 struct delayed_work mivr_dwork; 99 unsigned int irq_nums[MT6370_IRQ_MAX]; 100 int attach; 101 int psy_usb_type; 102 bool pwr_rdy; 103 }; 104 105 enum mt6370_usb_status { 106 MT6370_USB_STAT_NO_VBUS = 0, 107 MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING, 108 MT6370_USB_STAT_SDP, 109 MT6370_USB_STAT_SDP_NSTD, 110 MT6370_USB_STAT_DCP, 111 MT6370_USB_STAT_CDP, 112 MT6370_USB_STAT_MAX 113 }; 114 115 struct mt6370_chg_field { 116 const char *name; 117 const struct linear_range *range; 118 struct reg_field field; 119 }; 120 121 enum { 122 MT6370_RANGE_F_IAICR = 0, 123 MT6370_RANGE_F_VOREG, 124 MT6370_RANGE_F_VMIVR, 125 MT6370_RANGE_F_ICHG, 126 MT6370_RANGE_F_IPREC, 127 MT6370_RANGE_F_IEOC, 128 MT6370_RANGE_F_MAX 129 }; 130 131 static const struct linear_range mt6370_chg_ranges[MT6370_RANGE_F_MAX] = { 132 LINEAR_RANGE_IDX(MT6370_RANGE_F_IAICR, 100000, 0x0, 0x3F, 50000), 133 LINEAR_RANGE_IDX(MT6370_RANGE_F_VOREG, 3900000, 0x0, 0x51, 10000), 134 LINEAR_RANGE_IDX(MT6370_RANGE_F_VMIVR, 3900000, 0x0, 0x5F, 100000), 135 LINEAR_RANGE_IDX(MT6370_RANGE_F_ICHG, 900000, 0x08, 0x31, 100000), 136 LINEAR_RANGE_IDX(MT6370_RANGE_F_IPREC, 100000, 0x0, 0x0F, 50000), 137 LINEAR_RANGE_IDX(MT6370_RANGE_F_IEOC, 100000, 0x0, 0x0F, 50000), 138 }; 139 140 #define MT6370_CHG_FIELD(_fd, _reg, _lsb, _msb) \ 141 [_fd] = { \ 142 .name = #_fd, \ 143 .range = NULL, \ 144 .field = REG_FIELD(_reg, _lsb, _msb), \ 145 } 146 147 #define MT6370_CHG_FIELD_RANGE(_fd, _reg, _lsb, _msb) \ 148 [_fd] = { \ 149 .name = #_fd, \ 150 .range = &mt6370_chg_ranges[MT6370_RANGE_##_fd], \ 151 .field = REG_FIELD(_reg, _lsb, _msb), \ 152 } 153 154 static const struct mt6370_chg_field mt6370_chg_fields[F_MAX] = { 155 MT6370_CHG_FIELD(F_IINLMTSEL, MT6370_REG_CHG_CTRL2, 2, 3), 156 MT6370_CHG_FIELD(F_CFO_EN, MT6370_REG_CHG_CTRL2, 1, 1), 157 MT6370_CHG_FIELD(F_CHG_EN, MT6370_REG_CHG_CTRL2, 0, 0), 158 MT6370_CHG_FIELD_RANGE(F_IAICR, MT6370_REG_CHG_CTRL3, 2, 7), 159 MT6370_CHG_FIELD(F_AICR_EN, MT6370_REG_CHG_CTRL3, 1, 1), 160 MT6370_CHG_FIELD(F_ILIM_EN, MT6370_REG_CHG_CTRL3, 0, 0), 161 MT6370_CHG_FIELD_RANGE(F_VOREG, MT6370_REG_CHG_CTRL4, 1, 7), 162 MT6370_CHG_FIELD_RANGE(F_VMIVR, MT6370_REG_CHG_CTRL6, 1, 7), 163 MT6370_CHG_FIELD_RANGE(F_ICHG, MT6370_REG_CHG_CTRL7, 2, 7), 164 MT6370_CHG_FIELD_RANGE(F_IPREC, MT6370_REG_CHG_CTRL8, 0, 3), 165 MT6370_CHG_FIELD_RANGE(F_IEOC, MT6370_REG_CHG_CTRL9, 4, 7), 166 MT6370_CHG_FIELD(F_USBCHGEN, MT6370_REG_DEVICE_TYPE, 7, 7), 167 MT6370_CHG_FIELD(F_USB_STAT, MT6370_REG_USB_STATUS1, 4, 6), 168 MT6370_CHG_FIELD(F_CHGDET, MT6370_REG_USB_STATUS1, 3, 3), 169 MT6370_CHG_FIELD(F_CHG_STAT, MT6370_REG_CHG_STAT, 6, 7), 170 MT6370_CHG_FIELD(F_BOOST_STAT, MT6370_REG_CHG_STAT, 3, 3), 171 MT6370_CHG_FIELD(F_VBAT_LVL, MT6370_REG_CHG_STAT, 5, 5), 172 MT6370_CHG_FIELD(F_FL_STROBE, MT6370_REG_FLED_EN, 2, 2), 173 MT6370_CHG_FIELD(F_CHG_MIVR_STAT, MT6370_REG_CHG_STAT1, 6, 6), 174 MT6370_CHG_FIELD(F_UVP_D_STAT, MT6370_REG_OVPCTRL_STAT, 4, 4), 175 }; 176 177 static inline int mt6370_chg_field_get(struct mt6370_priv *priv, 178 enum mt6370_chg_reg_field fd, 179 unsigned int *val) 180 { 181 int ret; 182 unsigned int reg_val; 183 184 ret = regmap_field_read(priv->rmap_fields[fd], ®_val); 185 if (ret) 186 return ret; 187 188 if (mt6370_chg_fields[fd].range) 189 return linear_range_get_value(mt6370_chg_fields[fd].range, 190 reg_val, val); 191 192 *val = reg_val; 193 return 0; 194 } 195 196 static inline int mt6370_chg_field_set(struct mt6370_priv *priv, 197 enum mt6370_chg_reg_field fd, 198 unsigned int val) 199 { 200 int ret; 201 bool f; 202 const struct linear_range *r; 203 204 if (mt6370_chg_fields[fd].range) { 205 r = mt6370_chg_fields[fd].range; 206 207 if (fd == F_VMIVR) { 208 ret = linear_range_get_selector_high(r, val, &val, &f); 209 if (ret) 210 val = r->max_sel; 211 } else { 212 linear_range_get_selector_within(r, val, &val); 213 } 214 } 215 216 return regmap_field_write(priv->rmap_fields[fd], val); 217 } 218 219 enum { 220 MT6370_CHG_STAT_READY = 0, 221 MT6370_CHG_STAT_CHARGE_IN_PROGRESS, 222 MT6370_CHG_STAT_DONE, 223 MT6370_CHG_STAT_FAULT, 224 MT6370_CHG_STAT_MAX 225 }; 226 227 enum { 228 MT6370_ATTACH_STAT_DETACH = 0, 229 MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12, 230 MT6370_ATTACH_STAT_ATTACH_BC12_DONE, 231 MT6370_ATTACH_STAT_ATTACH_MAX 232 }; 233 234 static int mt6370_chg_otg_of_parse_cb(struct device_node *of, 235 const struct regulator_desc *rdesc, 236 struct regulator_config *rcfg) 237 { 238 struct mt6370_priv *priv = rcfg->driver_data; 239 240 rcfg->ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(of), 241 "enable", 0, GPIOD_OUT_LOW | 242 GPIOD_FLAGS_BIT_NONEXCLUSIVE, 243 rdesc->name); 244 if (IS_ERR(rcfg->ena_gpiod)) { 245 rcfg->ena_gpiod = NULL; 246 return 0; 247 } 248 249 return regmap_update_bits(priv->regmap, MT6370_REG_CHG_CTRL1, 250 MT6370_OTG_PIN_EN_MASK, 251 MT6370_OTG_PIN_EN_MASK); 252 } 253 254 static void mt6370_chg_bc12_work_func(struct work_struct *work) 255 { 256 struct mt6370_priv *priv = container_of(work, struct mt6370_priv, 257 bc12_work); 258 int ret; 259 bool rpt_psy = false; 260 unsigned int attach, usb_stat; 261 262 mutex_lock(&priv->attach_lock); 263 attach = priv->attach; 264 265 switch (attach) { 266 case MT6370_ATTACH_STAT_DETACH: 267 usb_stat = 0; 268 break; 269 case MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12: 270 ret = mt6370_chg_field_set(priv, F_USBCHGEN, attach); 271 if (ret) 272 dev_err(priv->dev, "Failed to enable USB CHG EN\n"); 273 goto bc12_work_func_out; 274 case MT6370_ATTACH_STAT_ATTACH_BC12_DONE: 275 ret = mt6370_chg_field_get(priv, F_USB_STAT, &usb_stat); 276 if (ret) { 277 dev_err(priv->dev, "Failed to get USB status\n"); 278 goto bc12_work_func_out; 279 } 280 break; 281 default: 282 dev_err(priv->dev, "Invalid attach state\n"); 283 goto bc12_work_func_out; 284 } 285 286 rpt_psy = true; 287 288 switch (usb_stat) { 289 case MT6370_USB_STAT_SDP: 290 case MT6370_USB_STAT_SDP_NSTD: 291 priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_SDP; 292 break; 293 case MT6370_USB_STAT_DCP: 294 priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_DCP; 295 break; 296 case MT6370_USB_STAT_CDP: 297 priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_CDP; 298 break; 299 case MT6370_USB_STAT_NO_VBUS: 300 case MT6370_USB_STAT_VBUS_FLOW_IS_UNDER_GOING: 301 default: 302 priv->psy_usb_type = POWER_SUPPLY_USB_TYPE_UNKNOWN; 303 break; 304 } 305 306 bc12_work_func_out: 307 mutex_unlock(&priv->attach_lock); 308 309 if (rpt_psy) 310 power_supply_changed(priv->psy); 311 } 312 313 static int mt6370_chg_toggle_cfo(struct mt6370_priv *priv) 314 { 315 int ret; 316 unsigned int fl_strobe; 317 318 /* check if flash led in strobe mode */ 319 ret = mt6370_chg_field_get(priv, F_FL_STROBE, &fl_strobe); 320 if (ret) { 321 dev_err(priv->dev, "Failed to get FL_STROBE_EN\n"); 322 return ret; 323 } 324 325 if (fl_strobe) { 326 dev_err(priv->dev, "Flash led is still in strobe mode\n"); 327 return -EINVAL; 328 } 329 330 /* cfo off */ 331 ret = mt6370_chg_field_set(priv, F_CFO_EN, 0); 332 if (ret) { 333 dev_err(priv->dev, "Failed to disable CFO_EN\n"); 334 return ret; 335 } 336 337 /* cfo on */ 338 ret = mt6370_chg_field_set(priv, F_CFO_EN, 1); 339 if (ret) 340 dev_err(priv->dev, "Failed to enable CFO_EN\n"); 341 342 return ret; 343 } 344 345 static int mt6370_chg_read_adc_chan(struct mt6370_priv *priv, unsigned int chan, 346 int *val) 347 { 348 int ret; 349 350 if (chan >= MT6370_ADC_CHAN_MAX) 351 return -EINVAL; 352 353 ret = iio_read_channel_processed(&priv->iio_adcs[chan], val); 354 if (ret) 355 dev_err(priv->dev, "Failed to read ADC\n"); 356 357 return ret; 358 } 359 360 static void mt6370_chg_mivr_dwork_func(struct work_struct *work) 361 { 362 struct mt6370_priv *priv = container_of(work, struct mt6370_priv, 363 mivr_dwork.work); 364 int ret; 365 unsigned int mivr_stat, ibus; 366 367 ret = mt6370_chg_field_get(priv, F_CHG_MIVR_STAT, &mivr_stat); 368 if (ret) { 369 dev_err(priv->dev, "Failed to get mivr state\n"); 370 goto mivr_handler_out; 371 } 372 373 if (!mivr_stat) 374 goto mivr_handler_out; 375 376 ret = mt6370_chg_read_adc_chan(priv, MT6370_ADC_CHAN_IBUS, &ibus); 377 if (ret) { 378 dev_err(priv->dev, "Failed to get ibus\n"); 379 goto mivr_handler_out; 380 } 381 382 if (ibus < MT6370_MIVR_IBUS_TH_100_mA) { 383 ret = mt6370_chg_toggle_cfo(priv); 384 if (ret) 385 dev_err(priv->dev, "Failed to toggle cfo\n"); 386 } 387 388 mivr_handler_out: 389 enable_irq(priv->irq_nums[MT6370_IRQ_MIVR]); 390 pm_relax(priv->dev); 391 } 392 393 static void mt6370_chg_pwr_rdy_check(struct mt6370_priv *priv) 394 { 395 int ret; 396 unsigned int opposite_pwr_rdy, otg_en; 397 union power_supply_propval val; 398 399 /* Check in OTG mode or not */ 400 ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en); 401 if (ret) { 402 dev_err(priv->dev, "Failed to get OTG state\n"); 403 return; 404 } 405 406 if (otg_en) 407 return; 408 409 ret = mt6370_chg_field_get(priv, F_UVP_D_STAT, &opposite_pwr_rdy); 410 if (ret) { 411 dev_err(priv->dev, "Failed to get opposite power ready state\n"); 412 return; 413 } 414 415 val.intval = opposite_pwr_rdy ? 416 MT6370_ATTACH_STAT_DETACH : 417 MT6370_ATTACH_STAT_ATTACH_WAIT_FOR_BC12; 418 419 ret = power_supply_set_property(priv->psy, POWER_SUPPLY_PROP_ONLINE, 420 &val); 421 if (ret) 422 dev_err(priv->dev, "Failed to start attach/detach flow\n"); 423 } 424 425 static int mt6370_chg_get_online(struct mt6370_priv *priv, 426 union power_supply_propval *val) 427 { 428 mutex_lock(&priv->attach_lock); 429 val->intval = !!priv->attach; 430 mutex_unlock(&priv->attach_lock); 431 432 return 0; 433 } 434 435 static int mt6370_chg_get_status(struct mt6370_priv *priv, 436 union power_supply_propval *val) 437 { 438 int ret; 439 unsigned int chg_stat; 440 union power_supply_propval online; 441 442 ret = power_supply_get_property(priv->psy, POWER_SUPPLY_PROP_ONLINE, 443 &online); 444 if (ret) { 445 dev_err(priv->dev, "Failed to get online status\n"); 446 return ret; 447 } 448 449 if (!online.intval) { 450 val->intval = POWER_SUPPLY_STATUS_DISCHARGING; 451 return 0; 452 } 453 454 ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat); 455 if (ret) 456 return ret; 457 458 switch (chg_stat) { 459 case MT6370_CHG_STAT_READY: 460 case MT6370_CHG_STAT_FAULT: 461 val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING; 462 return ret; 463 case MT6370_CHG_STAT_CHARGE_IN_PROGRESS: 464 val->intval = POWER_SUPPLY_STATUS_CHARGING; 465 return ret; 466 case MT6370_CHG_STAT_DONE: 467 val->intval = POWER_SUPPLY_STATUS_FULL; 468 return ret; 469 default: 470 val->intval = POWER_SUPPLY_STATUS_UNKNOWN; 471 return ret; 472 } 473 } 474 475 static int mt6370_chg_get_charge_type(struct mt6370_priv *priv, 476 union power_supply_propval *val) 477 { 478 int type, ret; 479 unsigned int chg_stat, vbat_lvl; 480 481 ret = mt6370_chg_field_get(priv, F_CHG_STAT, &chg_stat); 482 if (ret) 483 return ret; 484 485 ret = mt6370_chg_field_get(priv, F_VBAT_LVL, &vbat_lvl); 486 if (ret) 487 return ret; 488 489 switch (chg_stat) { 490 case MT6370_CHG_STAT_CHARGE_IN_PROGRESS: 491 if (vbat_lvl) 492 type = POWER_SUPPLY_CHARGE_TYPE_FAST; 493 else 494 type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; 495 break; 496 case MT6370_CHG_STAT_READY: 497 case MT6370_CHG_STAT_DONE: 498 case MT6370_CHG_STAT_FAULT: 499 default: 500 type = POWER_SUPPLY_CHARGE_TYPE_NONE; 501 break; 502 } 503 504 val->intval = type; 505 506 return 0; 507 } 508 509 static int mt6370_chg_set_online(struct mt6370_priv *priv, 510 const union power_supply_propval *val) 511 { 512 bool pwr_rdy = !!val->intval; 513 514 mutex_lock(&priv->attach_lock); 515 if (pwr_rdy == !!priv->attach) { 516 dev_err(priv->dev, "pwr_rdy is same(%d)\n", pwr_rdy); 517 mutex_unlock(&priv->attach_lock); 518 return 0; 519 } 520 521 priv->attach = pwr_rdy; 522 mutex_unlock(&priv->attach_lock); 523 524 if (!queue_work(priv->wq, &priv->bc12_work)) 525 dev_err(priv->dev, "bc12 work has already queued\n"); 526 527 return 0; 528 } 529 530 static int mt6370_chg_get_property(struct power_supply *psy, 531 enum power_supply_property psp, 532 union power_supply_propval *val) 533 { 534 struct mt6370_priv *priv = power_supply_get_drvdata(psy); 535 536 switch (psp) { 537 case POWER_SUPPLY_PROP_ONLINE: 538 return mt6370_chg_get_online(priv, val); 539 case POWER_SUPPLY_PROP_STATUS: 540 return mt6370_chg_get_status(priv, val); 541 case POWER_SUPPLY_PROP_CHARGE_TYPE: 542 return mt6370_chg_get_charge_type(priv, val); 543 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 544 return mt6370_chg_field_get(priv, F_ICHG, &val->intval); 545 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX: 546 val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_ICHG]); 547 return 0; 548 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 549 return mt6370_chg_field_get(priv, F_VOREG, &val->intval); 550 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX: 551 val->intval = linear_range_get_max_value(&mt6370_chg_ranges[MT6370_RANGE_F_VOREG]); 552 return 0; 553 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 554 return mt6370_chg_field_get(priv, F_IAICR, &val->intval); 555 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 556 return mt6370_chg_field_get(priv, F_VMIVR, &val->intval); 557 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 558 return mt6370_chg_field_get(priv, F_IPREC, &val->intval); 559 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 560 return mt6370_chg_field_get(priv, F_IEOC, &val->intval); 561 case POWER_SUPPLY_PROP_USB_TYPE: 562 val->intval = priv->psy_usb_type; 563 return 0; 564 default: 565 return -EINVAL; 566 } 567 } 568 569 static int mt6370_chg_set_property(struct power_supply *psy, 570 enum power_supply_property psp, 571 const union power_supply_propval *val) 572 { 573 struct mt6370_priv *priv = power_supply_get_drvdata(psy); 574 575 switch (psp) { 576 case POWER_SUPPLY_PROP_ONLINE: 577 return mt6370_chg_set_online(priv, val); 578 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 579 return mt6370_chg_field_set(priv, F_ICHG, val->intval); 580 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 581 return mt6370_chg_field_set(priv, F_VOREG, val->intval); 582 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 583 return mt6370_chg_field_set(priv, F_IAICR, val->intval); 584 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 585 return mt6370_chg_field_set(priv, F_VMIVR, val->intval); 586 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 587 return mt6370_chg_field_set(priv, F_IPREC, val->intval); 588 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 589 return mt6370_chg_field_set(priv, F_IEOC, val->intval); 590 default: 591 return -EINVAL; 592 } 593 } 594 595 static int mt6370_chg_property_is_writeable(struct power_supply *psy, 596 enum power_supply_property psp) 597 { 598 switch (psp) { 599 case POWER_SUPPLY_PROP_ONLINE: 600 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT: 601 case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE: 602 case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT: 603 case POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT: 604 case POWER_SUPPLY_PROP_PRECHARGE_CURRENT: 605 case POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT: 606 return 1; 607 default: 608 return 0; 609 } 610 } 611 612 static enum power_supply_property mt6370_chg_properties[] = { 613 POWER_SUPPLY_PROP_ONLINE, 614 POWER_SUPPLY_PROP_STATUS, 615 POWER_SUPPLY_PROP_CHARGE_TYPE, 616 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT, 617 POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX, 618 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE, 619 POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE_MAX, 620 POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, 621 POWER_SUPPLY_PROP_INPUT_VOLTAGE_LIMIT, 622 POWER_SUPPLY_PROP_PRECHARGE_CURRENT, 623 POWER_SUPPLY_PROP_CHARGE_TERM_CURRENT, 624 POWER_SUPPLY_PROP_USB_TYPE, 625 }; 626 627 static const struct power_supply_desc mt6370_chg_psy_desc = { 628 .name = "mt6370-charger", 629 .type = POWER_SUPPLY_TYPE_USB, 630 .properties = mt6370_chg_properties, 631 .num_properties = ARRAY_SIZE(mt6370_chg_properties), 632 .get_property = mt6370_chg_get_property, 633 .set_property = mt6370_chg_set_property, 634 .property_is_writeable = mt6370_chg_property_is_writeable, 635 .usb_types = BIT(POWER_SUPPLY_USB_TYPE_SDP) | 636 BIT(POWER_SUPPLY_USB_TYPE_CDP) | 637 BIT(POWER_SUPPLY_USB_TYPE_DCP) | 638 BIT(POWER_SUPPLY_USB_TYPE_UNKNOWN), 639 }; 640 641 static const struct regulator_ops mt6370_chg_otg_ops = { 642 .list_voltage = regulator_list_voltage_linear, 643 .enable = regulator_enable_regmap, 644 .disable = regulator_disable_regmap, 645 .is_enabled = regulator_is_enabled_regmap, 646 .set_voltage_sel = regulator_set_voltage_sel_regmap, 647 .get_voltage_sel = regulator_get_voltage_sel_regmap, 648 .set_current_limit = regulator_set_current_limit_regmap, 649 .get_current_limit = regulator_get_current_limit_regmap, 650 }; 651 652 static const u32 mt6370_chg_otg_oc_ma[] = { 653 500000, 700000, 1100000, 1300000, 1800000, 2100000, 2400000, 654 }; 655 656 static const struct regulator_desc mt6370_chg_otg_rdesc = { 657 .of_match = "usb-otg-vbus-regulator", 658 .of_parse_cb = mt6370_chg_otg_of_parse_cb, 659 .name = "mt6370-usb-otg-vbus", 660 .ops = &mt6370_chg_otg_ops, 661 .owner = THIS_MODULE, 662 .type = REGULATOR_VOLTAGE, 663 .min_uV = 4425000, 664 .uV_step = 25000, 665 .n_voltages = 57, 666 .vsel_reg = MT6370_REG_CHG_CTRL5, 667 .vsel_mask = MT6370_VOBST_MASK, 668 .enable_reg = MT6370_REG_CHG_CTRL1, 669 .enable_mask = MT6370_OPA_MODE_MASK, 670 .curr_table = mt6370_chg_otg_oc_ma, 671 .n_current_limits = ARRAY_SIZE(mt6370_chg_otg_oc_ma), 672 .csel_reg = MT6370_REG_CHG_CTRL10, 673 .csel_mask = MT6370_OTG_OC_MASK, 674 }; 675 676 static int mt6370_chg_init_rmap_fields(struct mt6370_priv *priv) 677 { 678 int i; 679 const struct mt6370_chg_field *fds = mt6370_chg_fields; 680 681 for (i = 0; i < F_MAX; i++) { 682 priv->rmap_fields[i] = devm_regmap_field_alloc(priv->dev, 683 priv->regmap, 684 fds[i].field); 685 if (IS_ERR(priv->rmap_fields[i])) 686 return dev_err_probe(priv->dev, 687 PTR_ERR(priv->rmap_fields[i]), 688 "Failed to allocate regmapfield[%s]\n", 689 fds[i].name); 690 } 691 692 return 0; 693 } 694 695 static int mt6370_chg_init_setting(struct mt6370_priv *priv) 696 { 697 int ret; 698 699 /* Disable usb_chg_en */ 700 ret = mt6370_chg_field_set(priv, F_USBCHGEN, 0); 701 if (ret) { 702 dev_err(priv->dev, "Failed to disable usb_chg_en\n"); 703 return ret; 704 } 705 706 /* Disable input current limit */ 707 ret = mt6370_chg_field_set(priv, F_ILIM_EN, 0); 708 if (ret) { 709 dev_err(priv->dev, "Failed to disable input current limit\n"); 710 return ret; 711 } 712 713 /* ICHG/IEOC Workaround, ICHG can not be set less than 900mA */ 714 ret = mt6370_chg_field_set(priv, F_ICHG, 900000); 715 if (ret) { 716 dev_err(priv->dev, "Failed to set ICHG to 900mA"); 717 return ret; 718 } 719 720 /* Change input current limit selection to using IAICR results */ 721 ret = mt6370_chg_field_set(priv, F_IINLMTSEL, 2); 722 if (ret) { 723 dev_err(priv->dev, "Failed to set IINLMTSEL\n"); 724 return ret; 725 } 726 727 return 0; 728 } 729 730 #define MT6370_CHG_DT_PROP_DECL(_name, _type, _field) \ 731 { \ 732 .name = "mediatek,chg-" #_name, \ 733 .type = MT6370_PARSE_TYPE_##_type, \ 734 .fd = _field, \ 735 } 736 737 static int mt6370_chg_init_otg_regulator(struct mt6370_priv *priv) 738 { 739 struct regulator_config rcfg = { 740 .dev = priv->dev, 741 .regmap = priv->regmap, 742 .driver_data = priv, 743 }; 744 745 priv->rdev = devm_regulator_register(priv->dev, &mt6370_chg_otg_rdesc, 746 &rcfg); 747 748 return PTR_ERR_OR_ZERO(priv->rdev); 749 } 750 751 static int mt6370_chg_init_psy(struct mt6370_priv *priv) 752 { 753 struct power_supply_config cfg = { 754 .drv_data = priv, 755 .of_node = dev_of_node(priv->dev), 756 }; 757 758 priv->psy = devm_power_supply_register(priv->dev, &mt6370_chg_psy_desc, 759 &cfg); 760 761 return PTR_ERR_OR_ZERO(priv->psy); 762 } 763 764 static void mt6370_chg_destroy_attach_lock(void *data) 765 { 766 struct mutex *attach_lock = data; 767 768 mutex_destroy(attach_lock); 769 } 770 771 static void mt6370_chg_destroy_wq(void *data) 772 { 773 struct workqueue_struct *wq = data; 774 775 flush_workqueue(wq); 776 destroy_workqueue(wq); 777 } 778 779 static irqreturn_t mt6370_attach_i_handler(int irq, void *data) 780 { 781 struct mt6370_priv *priv = data; 782 unsigned int otg_en; 783 int ret; 784 785 /* Check in OTG mode or not */ 786 ret = mt6370_chg_field_get(priv, F_BOOST_STAT, &otg_en); 787 if (ret) { 788 dev_err(priv->dev, "Failed to get OTG state\n"); 789 return IRQ_NONE; 790 } 791 792 if (otg_en) 793 return IRQ_HANDLED; 794 795 mutex_lock(&priv->attach_lock); 796 priv->attach = MT6370_ATTACH_STAT_ATTACH_BC12_DONE; 797 mutex_unlock(&priv->attach_lock); 798 799 if (!queue_work(priv->wq, &priv->bc12_work)) 800 dev_err(priv->dev, "bc12 work has already queued\n"); 801 802 return IRQ_HANDLED; 803 } 804 805 static irqreturn_t mt6370_uvp_d_evt_handler(int irq, void *data) 806 { 807 struct mt6370_priv *priv = data; 808 809 mt6370_chg_pwr_rdy_check(priv); 810 811 return IRQ_HANDLED; 812 } 813 814 static irqreturn_t mt6370_mivr_handler(int irq, void *data) 815 { 816 struct mt6370_priv *priv = data; 817 818 pm_stay_awake(priv->dev); 819 disable_irq_nosync(priv->irq_nums[MT6370_IRQ_MIVR]); 820 schedule_delayed_work(&priv->mivr_dwork, msecs_to_jiffies(200)); 821 822 return IRQ_HANDLED; 823 } 824 825 #define MT6370_CHG_IRQ(_name) \ 826 { \ 827 .name = #_name, \ 828 .handler = mt6370_##_name##_handler, \ 829 } 830 831 static int mt6370_chg_init_irq(struct mt6370_priv *priv) 832 { 833 int i, ret; 834 const struct { 835 char *name; 836 irq_handler_t handler; 837 } mt6370_chg_irqs[] = { 838 MT6370_CHG_IRQ(attach_i), 839 MT6370_CHG_IRQ(uvp_d_evt), 840 MT6370_CHG_IRQ(mivr), 841 }; 842 843 for (i = 0; i < ARRAY_SIZE(mt6370_chg_irqs); i++) { 844 ret = platform_get_irq_byname(to_platform_device(priv->dev), 845 mt6370_chg_irqs[i].name); 846 if (ret < 0) 847 return ret; 848 849 priv->irq_nums[i] = ret; 850 ret = devm_request_threaded_irq(priv->dev, ret, NULL, 851 mt6370_chg_irqs[i].handler, 852 IRQF_TRIGGER_FALLING, 853 dev_name(priv->dev), priv); 854 if (ret) 855 return dev_err_probe(priv->dev, ret, 856 "Failed to request irq %s\n", 857 mt6370_chg_irqs[i].name); 858 } 859 860 return 0; 861 } 862 863 static int mt6370_chg_probe(struct platform_device *pdev) 864 { 865 struct device *dev = &pdev->dev; 866 struct mt6370_priv *priv; 867 int ret; 868 869 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); 870 if (!priv) 871 return -ENOMEM; 872 873 priv->dev = &pdev->dev; 874 875 priv->regmap = dev_get_regmap(pdev->dev.parent, NULL); 876 if (!priv->regmap) 877 return dev_err_probe(dev, -ENODEV, "Failed to get regmap\n"); 878 879 ret = mt6370_chg_init_rmap_fields(priv); 880 if (ret) 881 return dev_err_probe(dev, ret, "Failed to init regmap fields\n"); 882 883 platform_set_drvdata(pdev, priv); 884 885 priv->iio_adcs = devm_iio_channel_get_all(priv->dev); 886 if (IS_ERR(priv->iio_adcs)) 887 return dev_err_probe(dev, PTR_ERR(priv->iio_adcs), 888 "Failed to get iio adc\n"); 889 890 ret = mt6370_chg_init_otg_regulator(priv); 891 if (ret) 892 return dev_err_probe(dev, ret, "Failed to init OTG regulator\n"); 893 894 ret = mt6370_chg_init_psy(priv); 895 if (ret) 896 return dev_err_probe(dev, ret, "Failed to init psy\n"); 897 898 mutex_init(&priv->attach_lock); 899 ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_attach_lock, 900 &priv->attach_lock); 901 if (ret) 902 return dev_err_probe(dev, ret, "Failed to init attach lock\n"); 903 904 priv->attach = MT6370_ATTACH_STAT_DETACH; 905 906 priv->wq = create_singlethread_workqueue(dev_name(priv->dev)); 907 if (!priv->wq) 908 return dev_err_probe(dev, -ENOMEM, 909 "Failed to create workqueue\n"); 910 911 ret = devm_add_action_or_reset(dev, mt6370_chg_destroy_wq, priv->wq); 912 if (ret) 913 return dev_err_probe(dev, ret, "Failed to init wq\n"); 914 915 ret = devm_work_autocancel(dev, &priv->bc12_work, mt6370_chg_bc12_work_func); 916 if (ret) 917 return dev_err_probe(dev, ret, "Failed to init bc12 work\n"); 918 919 ret = devm_delayed_work_autocancel(dev, &priv->mivr_dwork, mt6370_chg_mivr_dwork_func); 920 if (ret) 921 return dev_err_probe(dev, ret, "Failed to init mivr delayed work\n"); 922 923 ret = mt6370_chg_init_setting(priv); 924 if (ret) 925 return dev_err_probe(dev, ret, 926 "Failed to init mt6370 charger setting\n"); 927 928 ret = mt6370_chg_init_irq(priv); 929 if (ret) 930 return ret; 931 932 mt6370_chg_pwr_rdy_check(priv); 933 934 return 0; 935 } 936 937 static const struct of_device_id mt6370_chg_of_match[] = { 938 { .compatible = "mediatek,mt6370-charger", }, 939 {} 940 }; 941 MODULE_DEVICE_TABLE(of, mt6370_chg_of_match); 942 943 static struct platform_driver mt6370_chg_driver = { 944 .probe = mt6370_chg_probe, 945 .driver = { 946 .name = "mt6370-charger", 947 .of_match_table = mt6370_chg_of_match, 948 }, 949 }; 950 module_platform_driver(mt6370_chg_driver); 951 952 MODULE_AUTHOR("ChiaEn Wu <chiaen_wu@richtek.com>"); 953 MODULE_DESCRIPTION("MediaTek MT6370 Charger Driver"); 954 MODULE_LICENSE("GPL v2"); 955