1 /* 2 * Motorola CPCAP PMIC battery charger driver 3 * 4 * Copyright (C) 2017 Tony Lindgren <tony@atomide.com> 5 * 6 * Rewritten for Linux power framework with some parts based on 7 * on earlier driver found in the Motorola Linux kernel: 8 * 9 * Copyright (C) 2009-2010 Motorola, Inc. 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License version 2 as 13 * published by the Free Software Foundation. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 */ 20 21 #include <linux/atomic.h> 22 #include <linux/init.h> 23 #include <linux/module.h> 24 #include <linux/slab.h> 25 #include <linux/err.h> 26 #include <linux/interrupt.h> 27 #include <linux/notifier.h> 28 #include <linux/of.h> 29 #include <linux/of_platform.h> 30 #include <linux/platform_device.h> 31 #include <linux/power_supply.h> 32 #include <linux/regmap.h> 33 34 #include <linux/gpio/consumer.h> 35 #include <linux/usb/phy_companion.h> 36 #include <linux/phy/omap_usb.h> 37 #include <linux/usb/otg.h> 38 #include <linux/iio/consumer.h> 39 #include <linux/mfd/motorola-cpcap.h> 40 41 /* 42 * CPCAP_REG_CRM register bits. For documentation of somewhat similar hardware, 43 * see NXP "MC13783 Power Management and Audio Circuit Users's Guide" 44 * MC13783UG.pdf chapter "8.5 Battery Interface Register Summary". The registers 45 * and values for CPCAP are different, but some of the internal components seem 46 * similar. Also see the Motorola Linux kernel cpcap-regbits.h. CPCAP_REG_CHRGR_1 47 * bits that seem to describe the CRM register. 48 */ 49 #define CPCAP_REG_CRM_UNUSED_641_15 BIT(15) /* 641 = register number */ 50 #define CPCAP_REG_CRM_UNUSED_641_14 BIT(14) /* 641 = register number */ 51 #define CPCAP_REG_CRM_CHRG_LED_EN BIT(13) /* Charger LED */ 52 #define CPCAP_REG_CRM_RVRSMODE BIT(12) /* USB VBUS output enable */ 53 #define CPCAP_REG_CRM_ICHRG_TR1 BIT(11) /* Trickle charge current */ 54 #define CPCAP_REG_CRM_ICHRG_TR0 BIT(10) 55 #define CPCAP_REG_CRM_FET_OVRD BIT(9) /* 0 = hardware, 1 = FET_CTRL */ 56 #define CPCAP_REG_CRM_FET_CTRL BIT(8) /* BPFET 1 if FET_OVRD set */ 57 #define CPCAP_REG_CRM_VCHRG3 BIT(7) /* Charge voltage bits */ 58 #define CPCAP_REG_CRM_VCHRG2 BIT(6) 59 #define CPCAP_REG_CRM_VCHRG1 BIT(5) 60 #define CPCAP_REG_CRM_VCHRG0 BIT(4) 61 #define CPCAP_REG_CRM_ICHRG3 BIT(3) /* Charge current bits */ 62 #define CPCAP_REG_CRM_ICHRG2 BIT(2) 63 #define CPCAP_REG_CRM_ICHRG1 BIT(1) 64 #define CPCAP_REG_CRM_ICHRG0 BIT(0) 65 66 /* CPCAP_REG_CRM trickle charge voltages */ 67 #define CPCAP_REG_CRM_TR(val) (((val) & 0x3) << 10) 68 #define CPCAP_REG_CRM_TR_0A00 CPCAP_REG_CRM_TR(0x0) 69 #define CPCAP_REG_CRM_TR_0A24 CPCAP_REG_CRM_TR(0x1) 70 #define CPCAP_REG_CRM_TR_0A48 CPCAP_REG_CRM_TR(0x2) 71 #define CPCAP_REG_CRM_TR_0A72 CPCAP_REG_CRM_TR(0x4) 72 73 /* 74 * CPCAP_REG_CRM charge voltages based on the ADC channel 1 values. 75 * Note that these register bits don't match MC13783UG.pdf VCHRG 76 * register bits. 77 */ 78 #define CPCAP_REG_CRM_VCHRG(val) (((val) & 0xf) << 4) 79 #define CPCAP_REG_CRM_VCHRG_3V80 CPCAP_REG_CRM_VCHRG(0x0) 80 #define CPCAP_REG_CRM_VCHRG_4V10 CPCAP_REG_CRM_VCHRG(0x1) 81 #define CPCAP_REG_CRM_VCHRG_4V12 CPCAP_REG_CRM_VCHRG(0x2) 82 #define CPCAP_REG_CRM_VCHRG_4V15 CPCAP_REG_CRM_VCHRG(0x3) 83 #define CPCAP_REG_CRM_VCHRG_4V17 CPCAP_REG_CRM_VCHRG(0x4) 84 #define CPCAP_REG_CRM_VCHRG_4V20 CPCAP_REG_CRM_VCHRG(0x5) 85 #define CPCAP_REG_CRM_VCHRG_4V23 CPCAP_REG_CRM_VCHRG(0x6) 86 #define CPCAP_REG_CRM_VCHRG_4V25 CPCAP_REG_CRM_VCHRG(0x7) 87 #define CPCAP_REG_CRM_VCHRG_4V27 CPCAP_REG_CRM_VCHRG(0x8) 88 #define CPCAP_REG_CRM_VCHRG_4V30 CPCAP_REG_CRM_VCHRG(0x9) 89 #define CPCAP_REG_CRM_VCHRG_4V33 CPCAP_REG_CRM_VCHRG(0xa) 90 #define CPCAP_REG_CRM_VCHRG_4V35 CPCAP_REG_CRM_VCHRG(0xb) 91 #define CPCAP_REG_CRM_VCHRG_4V38 CPCAP_REG_CRM_VCHRG(0xc) 92 #define CPCAP_REG_CRM_VCHRG_4V40 CPCAP_REG_CRM_VCHRG(0xd) 93 #define CPCAP_REG_CRM_VCHRG_4V42 CPCAP_REG_CRM_VCHRG(0xe) 94 #define CPCAP_REG_CRM_VCHRG_4V44 CPCAP_REG_CRM_VCHRG(0xf) 95 96 /* 97 * CPCAP_REG_CRM charge currents. These seem to match MC13783UG.pdf 98 * values in "Table 8-3. Charge Path Regulator Current Limit 99 * Characteristics" for the nominal values. 100 */ 101 #define CPCAP_REG_CRM_ICHRG(val) (((val) & 0xf) << 0) 102 #define CPCAP_REG_CRM_ICHRG_0A000 CPCAP_REG_CRM_ICHRG(0x0) 103 #define CPCAP_REG_CRM_ICHRG_0A070 CPCAP_REG_CRM_ICHRG(0x1) 104 #define CPCAP_REG_CRM_ICHRG_0A177 CPCAP_REG_CRM_ICHRG(0x2) 105 #define CPCAP_REG_CRM_ICHRG_0A266 CPCAP_REG_CRM_ICHRG(0x3) 106 #define CPCAP_REG_CRM_ICHRG_0A355 CPCAP_REG_CRM_ICHRG(0x4) 107 #define CPCAP_REG_CRM_ICHRG_0A443 CPCAP_REG_CRM_ICHRG(0x5) 108 #define CPCAP_REG_CRM_ICHRG_0A532 CPCAP_REG_CRM_ICHRG(0x6) 109 #define CPCAP_REG_CRM_ICHRG_0A621 CPCAP_REG_CRM_ICHRG(0x7) 110 #define CPCAP_REG_CRM_ICHRG_0A709 CPCAP_REG_CRM_ICHRG(0x8) 111 #define CPCAP_REG_CRM_ICHRG_0A798 CPCAP_REG_CRM_ICHRG(0x9) 112 #define CPCAP_REG_CRM_ICHRG_0A886 CPCAP_REG_CRM_ICHRG(0xa) 113 #define CPCAP_REG_CRM_ICHRG_0A975 CPCAP_REG_CRM_ICHRG(0xb) 114 #define CPCAP_REG_CRM_ICHRG_1A064 CPCAP_REG_CRM_ICHRG(0xc) 115 #define CPCAP_REG_CRM_ICHRG_1A152 CPCAP_REG_CRM_ICHRG(0xd) 116 #define CPCAP_REG_CRM_ICHRG_1A596 CPCAP_REG_CRM_ICHRG(0xe) 117 #define CPCAP_REG_CRM_ICHRG_NO_LIMIT CPCAP_REG_CRM_ICHRG(0xf) 118 119 enum { 120 CPCAP_CHARGER_IIO_BATTDET, 121 CPCAP_CHARGER_IIO_VOLTAGE, 122 CPCAP_CHARGER_IIO_VBUS, 123 CPCAP_CHARGER_IIO_CHRG_CURRENT, 124 CPCAP_CHARGER_IIO_BATT_CURRENT, 125 CPCAP_CHARGER_IIO_NR, 126 }; 127 128 struct cpcap_charger_ddata { 129 struct device *dev; 130 struct regmap *reg; 131 struct list_head irq_list; 132 struct delayed_work detect_work; 133 struct delayed_work vbus_work; 134 struct gpio_desc *gpio[2]; /* gpio_reven0 & 1 */ 135 136 struct iio_channel *channels[CPCAP_CHARGER_IIO_NR]; 137 138 struct power_supply *usb; 139 140 struct phy_companion comparator; /* For USB VBUS */ 141 bool vbus_enabled; 142 atomic_t active; 143 144 int status; 145 }; 146 147 struct cpcap_interrupt_desc { 148 int irq; 149 struct list_head node; 150 const char *name; 151 }; 152 153 struct cpcap_charger_ints_state { 154 bool chrg_det; 155 bool rvrs_chrg; 156 bool vbusov; 157 158 bool chrg_se1b; 159 bool rvrs_mode; 160 bool chrgcurr1; 161 bool vbusvld; 162 163 bool battdetb; 164 }; 165 166 static enum power_supply_property cpcap_charger_props[] = { 167 POWER_SUPPLY_PROP_STATUS, 168 POWER_SUPPLY_PROP_ONLINE, 169 POWER_SUPPLY_PROP_VOLTAGE_NOW, 170 POWER_SUPPLY_PROP_CURRENT_NOW, 171 }; 172 173 static bool cpcap_charger_battery_found(struct cpcap_charger_ddata *ddata) 174 { 175 struct iio_channel *channel; 176 int error, value; 177 178 channel = ddata->channels[CPCAP_CHARGER_IIO_BATTDET]; 179 error = iio_read_channel_raw(channel, &value); 180 if (error < 0) { 181 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); 182 183 return false; 184 } 185 186 return value == 1; 187 } 188 189 static int cpcap_charger_get_charge_voltage(struct cpcap_charger_ddata *ddata) 190 { 191 struct iio_channel *channel; 192 int error, value = 0; 193 194 channel = ddata->channels[CPCAP_CHARGER_IIO_VOLTAGE]; 195 error = iio_read_channel_processed(channel, &value); 196 if (error < 0) { 197 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); 198 199 return 0; 200 } 201 202 return value; 203 } 204 205 static int cpcap_charger_get_charge_current(struct cpcap_charger_ddata *ddata) 206 { 207 struct iio_channel *channel; 208 int error, value = 0; 209 210 channel = ddata->channels[CPCAP_CHARGER_IIO_CHRG_CURRENT]; 211 error = iio_read_channel_processed(channel, &value); 212 if (error < 0) { 213 dev_warn(ddata->dev, "%s failed: %i\n", __func__, error); 214 215 return 0; 216 } 217 218 return value; 219 } 220 221 static int cpcap_charger_get_property(struct power_supply *psy, 222 enum power_supply_property psp, 223 union power_supply_propval *val) 224 { 225 struct cpcap_charger_ddata *ddata = dev_get_drvdata(psy->dev.parent); 226 227 switch (psp) { 228 case POWER_SUPPLY_PROP_STATUS: 229 val->intval = ddata->status; 230 break; 231 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 232 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING) 233 val->intval = cpcap_charger_get_charge_voltage(ddata) * 234 1000; 235 else 236 val->intval = 0; 237 break; 238 case POWER_SUPPLY_PROP_CURRENT_NOW: 239 if (ddata->status == POWER_SUPPLY_STATUS_CHARGING) 240 val->intval = cpcap_charger_get_charge_current(ddata) * 241 1000; 242 else 243 val->intval = 0; 244 break; 245 case POWER_SUPPLY_PROP_ONLINE: 246 val->intval = ddata->status == POWER_SUPPLY_STATUS_CHARGING; 247 break; 248 default: 249 return -EINVAL; 250 } 251 252 return 0; 253 } 254 255 static void cpcap_charger_set_cable_path(struct cpcap_charger_ddata *ddata, 256 bool enabled) 257 { 258 if (!ddata->gpio[0]) 259 return; 260 261 gpiod_set_value(ddata->gpio[0], enabled); 262 } 263 264 static void cpcap_charger_set_inductive_path(struct cpcap_charger_ddata *ddata, 265 bool enabled) 266 { 267 if (!ddata->gpio[1]) 268 return; 269 270 gpiod_set_value(ddata->gpio[1], enabled); 271 } 272 273 static int cpcap_charger_set_state(struct cpcap_charger_ddata *ddata, 274 int max_voltage, int charge_current, 275 int trickle_current) 276 { 277 bool enable; 278 int error; 279 280 enable = (charge_current || trickle_current); 281 dev_dbg(ddata->dev, "%s enable: %i\n", __func__, enable); 282 283 if (!enable) { 284 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 285 0x3fff, 286 CPCAP_REG_CRM_FET_OVRD | 287 CPCAP_REG_CRM_FET_CTRL); 288 if (error) { 289 ddata->status = POWER_SUPPLY_STATUS_UNKNOWN; 290 goto out_err; 291 } 292 293 ddata->status = POWER_SUPPLY_STATUS_DISCHARGING; 294 295 return 0; 296 } 297 298 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 0x3fff, 299 CPCAP_REG_CRM_CHRG_LED_EN | 300 trickle_current | 301 CPCAP_REG_CRM_FET_OVRD | 302 CPCAP_REG_CRM_FET_CTRL | 303 max_voltage | 304 charge_current); 305 if (error) { 306 ddata->status = POWER_SUPPLY_STATUS_UNKNOWN; 307 goto out_err; 308 } 309 310 ddata->status = POWER_SUPPLY_STATUS_CHARGING; 311 312 return 0; 313 314 out_err: 315 dev_err(ddata->dev, "%s failed with %i\n", __func__, error); 316 317 return error; 318 } 319 320 static bool cpcap_charger_vbus_valid(struct cpcap_charger_ddata *ddata) 321 { 322 int error, value = 0; 323 struct iio_channel *channel = 324 ddata->channels[CPCAP_CHARGER_IIO_VBUS]; 325 326 error = iio_read_channel_processed(channel, &value); 327 if (error >= 0) 328 return value > 3900 ? true : false; 329 330 dev_err(ddata->dev, "error reading VBUS: %i\n", error); 331 332 return false; 333 } 334 335 /* VBUS control functions for the USB PHY companion */ 336 337 static void cpcap_charger_vbus_work(struct work_struct *work) 338 { 339 struct cpcap_charger_ddata *ddata; 340 bool vbus = false; 341 int error; 342 343 ddata = container_of(work, struct cpcap_charger_ddata, 344 vbus_work.work); 345 346 if (ddata->vbus_enabled) { 347 vbus = cpcap_charger_vbus_valid(ddata); 348 if (vbus) { 349 dev_info(ddata->dev, "VBUS already provided\n"); 350 351 return; 352 } 353 354 cpcap_charger_set_cable_path(ddata, false); 355 cpcap_charger_set_inductive_path(ddata, false); 356 357 error = cpcap_charger_set_state(ddata, 0, 0, 0); 358 if (error) 359 goto out_err; 360 361 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 362 CPCAP_REG_CRM_RVRSMODE, 363 CPCAP_REG_CRM_RVRSMODE); 364 if (error) 365 goto out_err; 366 } else { 367 error = regmap_update_bits(ddata->reg, CPCAP_REG_CRM, 368 CPCAP_REG_CRM_RVRSMODE, 0); 369 if (error) 370 goto out_err; 371 372 cpcap_charger_set_cable_path(ddata, true); 373 cpcap_charger_set_inductive_path(ddata, true); 374 } 375 376 return; 377 378 out_err: 379 dev_err(ddata->dev, "%s could not %s vbus: %i\n", __func__, 380 ddata->vbus_enabled ? "enable" : "disable", error); 381 } 382 383 static int cpcap_charger_set_vbus(struct phy_companion *comparator, 384 bool enabled) 385 { 386 struct cpcap_charger_ddata *ddata = 387 container_of(comparator, struct cpcap_charger_ddata, 388 comparator); 389 390 ddata->vbus_enabled = enabled; 391 schedule_delayed_work(&ddata->vbus_work, 0); 392 393 return 0; 394 } 395 396 /* Charger interrupt handling functions */ 397 398 static int cpcap_charger_get_ints_state(struct cpcap_charger_ddata *ddata, 399 struct cpcap_charger_ints_state *s) 400 { 401 int val, error; 402 403 error = regmap_read(ddata->reg, CPCAP_REG_INTS1, &val); 404 if (error) 405 return error; 406 407 s->chrg_det = val & BIT(13); 408 s->rvrs_chrg = val & BIT(12); 409 s->vbusov = val & BIT(11); 410 411 error = regmap_read(ddata->reg, CPCAP_REG_INTS2, &val); 412 if (error) 413 return error; 414 415 s->chrg_se1b = val & BIT(13); 416 s->rvrs_mode = val & BIT(6); 417 s->chrgcurr1 = val & BIT(4); 418 s->vbusvld = val & BIT(3); 419 420 error = regmap_read(ddata->reg, CPCAP_REG_INTS4, &val); 421 if (error) 422 return error; 423 424 s->battdetb = val & BIT(6); 425 426 return 0; 427 } 428 429 static void cpcap_usb_detect(struct work_struct *work) 430 { 431 struct cpcap_charger_ddata *ddata; 432 struct cpcap_charger_ints_state s; 433 int error; 434 435 ddata = container_of(work, struct cpcap_charger_ddata, 436 detect_work.work); 437 438 error = cpcap_charger_get_ints_state(ddata, &s); 439 if (error) 440 return; 441 442 if (cpcap_charger_vbus_valid(ddata) && s.chrgcurr1) { 443 int max_current; 444 445 if (cpcap_charger_battery_found(ddata)) 446 max_current = CPCAP_REG_CRM_ICHRG_1A596; 447 else 448 max_current = CPCAP_REG_CRM_ICHRG_0A532; 449 450 error = cpcap_charger_set_state(ddata, 451 CPCAP_REG_CRM_VCHRG_4V35, 452 max_current, 0); 453 if (error) 454 goto out_err; 455 } else { 456 error = cpcap_charger_set_state(ddata, 0, 0, 0); 457 if (error) 458 goto out_err; 459 } 460 461 return; 462 463 out_err: 464 dev_err(ddata->dev, "%s failed with %i\n", __func__, error); 465 } 466 467 static irqreturn_t cpcap_charger_irq_thread(int irq, void *data) 468 { 469 struct cpcap_charger_ddata *ddata = data; 470 471 if (!atomic_read(&ddata->active)) 472 return IRQ_NONE; 473 474 schedule_delayed_work(&ddata->detect_work, 0); 475 476 return IRQ_HANDLED; 477 } 478 479 static int cpcap_usb_init_irq(struct platform_device *pdev, 480 struct cpcap_charger_ddata *ddata, 481 const char *name) 482 { 483 struct cpcap_interrupt_desc *d; 484 int irq, error; 485 486 irq = platform_get_irq_byname(pdev, name); 487 if (irq < 0) 488 return -ENODEV; 489 490 error = devm_request_threaded_irq(ddata->dev, irq, NULL, 491 cpcap_charger_irq_thread, 492 IRQF_SHARED, 493 name, ddata); 494 if (error) { 495 dev_err(ddata->dev, "could not get irq %s: %i\n", 496 name, error); 497 498 return error; 499 } 500 501 d = devm_kzalloc(ddata->dev, sizeof(*d), GFP_KERNEL); 502 if (!d) 503 return -ENOMEM; 504 505 d->name = name; 506 d->irq = irq; 507 list_add(&d->node, &ddata->irq_list); 508 509 return 0; 510 } 511 512 static const char * const cpcap_charger_irqs[] = { 513 /* REG_INT_0 */ 514 "chrg_det", "rvrs_chrg", 515 516 /* REG_INT1 */ 517 "chrg_se1b", "se0conn", "rvrs_mode", "chrgcurr1", "vbusvld", 518 519 /* REG_INT_3 */ 520 "battdetb", 521 }; 522 523 static int cpcap_usb_init_interrupts(struct platform_device *pdev, 524 struct cpcap_charger_ddata *ddata) 525 { 526 int i, error; 527 528 for (i = 0; i < ARRAY_SIZE(cpcap_charger_irqs); i++) { 529 error = cpcap_usb_init_irq(pdev, ddata, cpcap_charger_irqs[i]); 530 if (error) 531 return error; 532 } 533 534 return 0; 535 } 536 537 static void cpcap_charger_init_optional_gpios(struct cpcap_charger_ddata *ddata) 538 { 539 int i; 540 541 for (i = 0; i < 2; i++) { 542 ddata->gpio[i] = devm_gpiod_get_index(ddata->dev, "mode", 543 i, GPIOD_OUT_HIGH); 544 if (IS_ERR(ddata->gpio[i])) { 545 dev_info(ddata->dev, "no mode change GPIO%i: %li\n", 546 i, PTR_ERR(ddata->gpio[i])); 547 ddata->gpio[i] = NULL; 548 } 549 } 550 } 551 552 static int cpcap_charger_init_iio(struct cpcap_charger_ddata *ddata) 553 { 554 const char * const names[CPCAP_CHARGER_IIO_NR] = { 555 "battdetb", "battp", "vbus", "chg_isense", "batti", 556 }; 557 int error, i; 558 559 for (i = 0; i < CPCAP_CHARGER_IIO_NR; i++) { 560 ddata->channels[i] = devm_iio_channel_get(ddata->dev, 561 names[i]); 562 if (IS_ERR(ddata->channels[i])) { 563 error = PTR_ERR(ddata->channels[i]); 564 goto out_err; 565 } 566 567 if (!ddata->channels[i]->indio_dev) { 568 error = -ENXIO; 569 goto out_err; 570 } 571 } 572 573 return 0; 574 575 out_err: 576 dev_err(ddata->dev, "could not initialize VBUS or ID IIO: %i\n", 577 error); 578 579 return error; 580 } 581 582 static const struct power_supply_desc cpcap_charger_usb_desc = { 583 .name = "usb", 584 .type = POWER_SUPPLY_TYPE_USB, 585 .properties = cpcap_charger_props, 586 .num_properties = ARRAY_SIZE(cpcap_charger_props), 587 .get_property = cpcap_charger_get_property, 588 }; 589 590 #ifdef CONFIG_OF 591 static const struct of_device_id cpcap_charger_id_table[] = { 592 { 593 .compatible = "motorola,mapphone-cpcap-charger", 594 }, 595 {}, 596 }; 597 MODULE_DEVICE_TABLE(of, cpcap_charger_id_table); 598 #endif 599 600 static int cpcap_charger_probe(struct platform_device *pdev) 601 { 602 struct cpcap_charger_ddata *ddata; 603 const struct of_device_id *of_id; 604 struct power_supply_config psy_cfg = {}; 605 int error; 606 607 of_id = of_match_device(of_match_ptr(cpcap_charger_id_table), 608 &pdev->dev); 609 if (!of_id) 610 return -EINVAL; 611 612 ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); 613 if (!ddata) 614 return -ENOMEM; 615 616 ddata->dev = &pdev->dev; 617 618 ddata->reg = dev_get_regmap(ddata->dev->parent, NULL); 619 if (!ddata->reg) 620 return -ENODEV; 621 622 INIT_LIST_HEAD(&ddata->irq_list); 623 INIT_DELAYED_WORK(&ddata->detect_work, cpcap_usb_detect); 624 INIT_DELAYED_WORK(&ddata->vbus_work, cpcap_charger_vbus_work); 625 platform_set_drvdata(pdev, ddata); 626 627 error = cpcap_charger_init_iio(ddata); 628 if (error) 629 return error; 630 631 atomic_set(&ddata->active, 1); 632 633 psy_cfg.of_node = pdev->dev.of_node; 634 psy_cfg.drv_data = ddata; 635 636 ddata->usb = devm_power_supply_register(ddata->dev, 637 &cpcap_charger_usb_desc, 638 &psy_cfg); 639 if (IS_ERR(ddata->usb)) { 640 error = PTR_ERR(ddata->usb); 641 dev_err(ddata->dev, "failed to register USB charger: %i\n", 642 error); 643 644 return error; 645 } 646 647 error = cpcap_usb_init_interrupts(pdev, ddata); 648 if (error) 649 return error; 650 651 ddata->comparator.set_vbus = cpcap_charger_set_vbus; 652 error = omap_usb2_set_comparator(&ddata->comparator); 653 if (error == -ENODEV) { 654 dev_info(ddata->dev, "charger needs phy, deferring probe\n"); 655 return -EPROBE_DEFER; 656 } 657 658 cpcap_charger_init_optional_gpios(ddata); 659 660 schedule_delayed_work(&ddata->detect_work, 0); 661 662 return 0; 663 } 664 665 static int cpcap_charger_remove(struct platform_device *pdev) 666 { 667 struct cpcap_charger_ddata *ddata = platform_get_drvdata(pdev); 668 int error; 669 670 atomic_set(&ddata->active, 0); 671 error = omap_usb2_set_comparator(NULL); 672 if (error) 673 dev_warn(ddata->dev, "could not clear USB comparator: %i\n", 674 error); 675 676 error = cpcap_charger_set_state(ddata, 0, 0, 0); 677 if (error) 678 dev_warn(ddata->dev, "could not clear charger: %i\n", 679 error); 680 cancel_delayed_work_sync(&ddata->vbus_work); 681 cancel_delayed_work_sync(&ddata->detect_work); 682 683 return 0; 684 } 685 686 static struct platform_driver cpcap_charger_driver = { 687 .probe = cpcap_charger_probe, 688 .driver = { 689 .name = "cpcap-charger", 690 .of_match_table = of_match_ptr(cpcap_charger_id_table), 691 }, 692 .remove = cpcap_charger_remove, 693 }; 694 module_platform_driver(cpcap_charger_driver); 695 696 MODULE_AUTHOR("Tony Lindgren <tony@atomide.com>"); 697 MODULE_DESCRIPTION("CPCAP Battery Charger Interface driver"); 698 MODULE_LICENSE("GPL v2"); 699 MODULE_ALIAS("platform:cpcap-charger"); 700