1 /* 2 * PMU driver for Wolfson Microelectronics wm831x PMICs 3 * 4 * Copyright 2009 Wolfson Microelectronics PLC. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <linux/module.h> 12 #include <linux/err.h> 13 #include <linux/platform_device.h> 14 #include <linux/power_supply.h> 15 #include <linux/slab.h> 16 17 #include <linux/mfd/wm831x/core.h> 18 #include <linux/mfd/wm831x/auxadc.h> 19 #include <linux/mfd/wm831x/pmu.h> 20 #include <linux/mfd/wm831x/pdata.h> 21 22 struct wm831x_power { 23 struct wm831x *wm831x; 24 struct power_supply *wall; 25 struct power_supply *usb; 26 struct power_supply *battery; 27 struct power_supply_desc wall_desc; 28 struct power_supply_desc usb_desc; 29 struct power_supply_desc battery_desc; 30 char wall_name[20]; 31 char usb_name[20]; 32 char battery_name[20]; 33 bool have_battery; 34 }; 35 36 static int wm831x_power_check_online(struct wm831x *wm831x, int supply, 37 union power_supply_propval *val) 38 { 39 int ret; 40 41 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS); 42 if (ret < 0) 43 return ret; 44 45 if (ret & supply) 46 val->intval = 1; 47 else 48 val->intval = 0; 49 50 return 0; 51 } 52 53 static int wm831x_power_read_voltage(struct wm831x *wm831x, 54 enum wm831x_auxadc src, 55 union power_supply_propval *val) 56 { 57 int ret; 58 59 ret = wm831x_auxadc_read_uv(wm831x, src); 60 if (ret >= 0) 61 val->intval = ret; 62 63 return ret; 64 } 65 66 /********************************************************************* 67 * WALL Power 68 *********************************************************************/ 69 static int wm831x_wall_get_prop(struct power_supply *psy, 70 enum power_supply_property psp, 71 union power_supply_propval *val) 72 { 73 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); 74 struct wm831x *wm831x = wm831x_power->wm831x; 75 int ret = 0; 76 77 switch (psp) { 78 case POWER_SUPPLY_PROP_ONLINE: 79 ret = wm831x_power_check_online(wm831x, WM831X_PWR_WALL, val); 80 break; 81 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 82 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_WALL, val); 83 break; 84 default: 85 ret = -EINVAL; 86 break; 87 } 88 89 return ret; 90 } 91 92 static enum power_supply_property wm831x_wall_props[] = { 93 POWER_SUPPLY_PROP_ONLINE, 94 POWER_SUPPLY_PROP_VOLTAGE_NOW, 95 }; 96 97 /********************************************************************* 98 * USB Power 99 *********************************************************************/ 100 static int wm831x_usb_get_prop(struct power_supply *psy, 101 enum power_supply_property psp, 102 union power_supply_propval *val) 103 { 104 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); 105 struct wm831x *wm831x = wm831x_power->wm831x; 106 int ret = 0; 107 108 switch (psp) { 109 case POWER_SUPPLY_PROP_ONLINE: 110 ret = wm831x_power_check_online(wm831x, WM831X_PWR_USB, val); 111 break; 112 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 113 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_USB, val); 114 break; 115 default: 116 ret = -EINVAL; 117 break; 118 } 119 120 return ret; 121 } 122 123 static enum power_supply_property wm831x_usb_props[] = { 124 POWER_SUPPLY_PROP_ONLINE, 125 POWER_SUPPLY_PROP_VOLTAGE_NOW, 126 }; 127 128 /********************************************************************* 129 * Battery properties 130 *********************************************************************/ 131 132 struct chg_map { 133 int val; 134 int reg_val; 135 }; 136 137 static struct chg_map trickle_ilims[] = { 138 { 50, 0 << WM831X_CHG_TRKL_ILIM_SHIFT }, 139 { 100, 1 << WM831X_CHG_TRKL_ILIM_SHIFT }, 140 { 150, 2 << WM831X_CHG_TRKL_ILIM_SHIFT }, 141 { 200, 3 << WM831X_CHG_TRKL_ILIM_SHIFT }, 142 }; 143 144 static struct chg_map vsels[] = { 145 { 4050, 0 << WM831X_CHG_VSEL_SHIFT }, 146 { 4100, 1 << WM831X_CHG_VSEL_SHIFT }, 147 { 4150, 2 << WM831X_CHG_VSEL_SHIFT }, 148 { 4200, 3 << WM831X_CHG_VSEL_SHIFT }, 149 }; 150 151 static struct chg_map fast_ilims[] = { 152 { 0, 0 << WM831X_CHG_FAST_ILIM_SHIFT }, 153 { 50, 1 << WM831X_CHG_FAST_ILIM_SHIFT }, 154 { 100, 2 << WM831X_CHG_FAST_ILIM_SHIFT }, 155 { 150, 3 << WM831X_CHG_FAST_ILIM_SHIFT }, 156 { 200, 4 << WM831X_CHG_FAST_ILIM_SHIFT }, 157 { 250, 5 << WM831X_CHG_FAST_ILIM_SHIFT }, 158 { 300, 6 << WM831X_CHG_FAST_ILIM_SHIFT }, 159 { 350, 7 << WM831X_CHG_FAST_ILIM_SHIFT }, 160 { 400, 8 << WM831X_CHG_FAST_ILIM_SHIFT }, 161 { 450, 9 << WM831X_CHG_FAST_ILIM_SHIFT }, 162 { 500, 10 << WM831X_CHG_FAST_ILIM_SHIFT }, 163 { 600, 11 << WM831X_CHG_FAST_ILIM_SHIFT }, 164 { 700, 12 << WM831X_CHG_FAST_ILIM_SHIFT }, 165 { 800, 13 << WM831X_CHG_FAST_ILIM_SHIFT }, 166 { 900, 14 << WM831X_CHG_FAST_ILIM_SHIFT }, 167 { 1000, 15 << WM831X_CHG_FAST_ILIM_SHIFT }, 168 }; 169 170 static struct chg_map eoc_iterms[] = { 171 { 20, 0 << WM831X_CHG_ITERM_SHIFT }, 172 { 30, 1 << WM831X_CHG_ITERM_SHIFT }, 173 { 40, 2 << WM831X_CHG_ITERM_SHIFT }, 174 { 50, 3 << WM831X_CHG_ITERM_SHIFT }, 175 { 60, 4 << WM831X_CHG_ITERM_SHIFT }, 176 { 70, 5 << WM831X_CHG_ITERM_SHIFT }, 177 { 80, 6 << WM831X_CHG_ITERM_SHIFT }, 178 { 90, 7 << WM831X_CHG_ITERM_SHIFT }, 179 }; 180 181 static struct chg_map chg_times[] = { 182 { 60, 0 << WM831X_CHG_TIME_SHIFT }, 183 { 90, 1 << WM831X_CHG_TIME_SHIFT }, 184 { 120, 2 << WM831X_CHG_TIME_SHIFT }, 185 { 150, 3 << WM831X_CHG_TIME_SHIFT }, 186 { 180, 4 << WM831X_CHG_TIME_SHIFT }, 187 { 210, 5 << WM831X_CHG_TIME_SHIFT }, 188 { 240, 6 << WM831X_CHG_TIME_SHIFT }, 189 { 270, 7 << WM831X_CHG_TIME_SHIFT }, 190 { 300, 8 << WM831X_CHG_TIME_SHIFT }, 191 { 330, 9 << WM831X_CHG_TIME_SHIFT }, 192 { 360, 10 << WM831X_CHG_TIME_SHIFT }, 193 { 390, 11 << WM831X_CHG_TIME_SHIFT }, 194 { 420, 12 << WM831X_CHG_TIME_SHIFT }, 195 { 450, 13 << WM831X_CHG_TIME_SHIFT }, 196 { 480, 14 << WM831X_CHG_TIME_SHIFT }, 197 { 510, 15 << WM831X_CHG_TIME_SHIFT }, 198 }; 199 200 static void wm831x_battey_apply_config(struct wm831x *wm831x, 201 struct chg_map *map, int count, int val, 202 int *reg, const char *name, 203 const char *units) 204 { 205 int i; 206 207 for (i = 0; i < count; i++) 208 if (val == map[i].val) 209 break; 210 if (i == count) { 211 dev_err(wm831x->dev, "Invalid %s %d%s\n", 212 name, val, units); 213 } else { 214 *reg |= map[i].reg_val; 215 dev_dbg(wm831x->dev, "Set %s of %d%s\n", name, val, units); 216 } 217 } 218 219 static void wm831x_config_battery(struct wm831x *wm831x) 220 { 221 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data; 222 struct wm831x_battery_pdata *pdata; 223 int ret, reg1, reg2; 224 225 if (!wm831x_pdata || !wm831x_pdata->battery) { 226 dev_warn(wm831x->dev, 227 "No battery charger configuration\n"); 228 return; 229 } 230 231 pdata = wm831x_pdata->battery; 232 233 reg1 = 0; 234 reg2 = 0; 235 236 if (!pdata->enable) { 237 dev_info(wm831x->dev, "Battery charger disabled\n"); 238 return; 239 } 240 241 reg1 |= WM831X_CHG_ENA; 242 if (pdata->off_mask) 243 reg2 |= WM831X_CHG_OFF_MSK; 244 if (pdata->fast_enable) 245 reg1 |= WM831X_CHG_FAST; 246 247 wm831x_battey_apply_config(wm831x, trickle_ilims, 248 ARRAY_SIZE(trickle_ilims), 249 pdata->trickle_ilim, ®2, 250 "trickle charge current limit", "mA"); 251 252 wm831x_battey_apply_config(wm831x, vsels, ARRAY_SIZE(vsels), 253 pdata->vsel, ®2, 254 "target voltage", "mV"); 255 256 wm831x_battey_apply_config(wm831x, fast_ilims, ARRAY_SIZE(fast_ilims), 257 pdata->fast_ilim, ®2, 258 "fast charge current limit", "mA"); 259 260 wm831x_battey_apply_config(wm831x, eoc_iterms, ARRAY_SIZE(eoc_iterms), 261 pdata->eoc_iterm, ®1, 262 "end of charge current threshold", "mA"); 263 264 wm831x_battey_apply_config(wm831x, chg_times, ARRAY_SIZE(chg_times), 265 pdata->timeout, ®2, 266 "charger timeout", "min"); 267 268 ret = wm831x_reg_unlock(wm831x); 269 if (ret != 0) { 270 dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret); 271 return; 272 } 273 274 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_1, 275 WM831X_CHG_ENA_MASK | 276 WM831X_CHG_FAST_MASK | 277 WM831X_CHG_ITERM_MASK, 278 reg1); 279 if (ret != 0) 280 dev_err(wm831x->dev, "Failed to set charger control 1: %d\n", 281 ret); 282 283 ret = wm831x_set_bits(wm831x, WM831X_CHARGER_CONTROL_2, 284 WM831X_CHG_OFF_MSK | 285 WM831X_CHG_TIME_MASK | 286 WM831X_CHG_FAST_ILIM_MASK | 287 WM831X_CHG_TRKL_ILIM_MASK | 288 WM831X_CHG_VSEL_MASK, 289 reg2); 290 if (ret != 0) 291 dev_err(wm831x->dev, "Failed to set charger control 2: %d\n", 292 ret); 293 294 wm831x_reg_lock(wm831x); 295 } 296 297 static int wm831x_bat_check_status(struct wm831x *wm831x, int *status) 298 { 299 int ret; 300 301 ret = wm831x_reg_read(wm831x, WM831X_SYSTEM_STATUS); 302 if (ret < 0) 303 return ret; 304 305 if (ret & WM831X_PWR_SRC_BATT) { 306 *status = POWER_SUPPLY_STATUS_DISCHARGING; 307 return 0; 308 } 309 310 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS); 311 if (ret < 0) 312 return ret; 313 314 switch (ret & WM831X_CHG_STATE_MASK) { 315 case WM831X_CHG_STATE_OFF: 316 *status = POWER_SUPPLY_STATUS_NOT_CHARGING; 317 break; 318 case WM831X_CHG_STATE_TRICKLE: 319 case WM831X_CHG_STATE_FAST: 320 *status = POWER_SUPPLY_STATUS_CHARGING; 321 break; 322 323 default: 324 *status = POWER_SUPPLY_STATUS_UNKNOWN; 325 break; 326 } 327 328 return 0; 329 } 330 331 static int wm831x_bat_check_type(struct wm831x *wm831x, int *type) 332 { 333 int ret; 334 335 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS); 336 if (ret < 0) 337 return ret; 338 339 switch (ret & WM831X_CHG_STATE_MASK) { 340 case WM831X_CHG_STATE_TRICKLE: 341 case WM831X_CHG_STATE_TRICKLE_OT: 342 *type = POWER_SUPPLY_CHARGE_TYPE_TRICKLE; 343 break; 344 case WM831X_CHG_STATE_FAST: 345 case WM831X_CHG_STATE_FAST_OT: 346 *type = POWER_SUPPLY_CHARGE_TYPE_FAST; 347 break; 348 default: 349 *type = POWER_SUPPLY_CHARGE_TYPE_NONE; 350 break; 351 } 352 353 return 0; 354 } 355 356 static int wm831x_bat_check_health(struct wm831x *wm831x, int *health) 357 { 358 int ret; 359 360 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_STATUS); 361 if (ret < 0) 362 return ret; 363 364 if (ret & WM831X_BATT_HOT_STS) { 365 *health = POWER_SUPPLY_HEALTH_OVERHEAT; 366 return 0; 367 } 368 369 if (ret & WM831X_BATT_COLD_STS) { 370 *health = POWER_SUPPLY_HEALTH_COLD; 371 return 0; 372 } 373 374 if (ret & WM831X_BATT_OV_STS) { 375 *health = POWER_SUPPLY_HEALTH_OVERVOLTAGE; 376 return 0; 377 } 378 379 switch (ret & WM831X_CHG_STATE_MASK) { 380 case WM831X_CHG_STATE_TRICKLE_OT: 381 case WM831X_CHG_STATE_FAST_OT: 382 *health = POWER_SUPPLY_HEALTH_OVERHEAT; 383 break; 384 case WM831X_CHG_STATE_DEFECTIVE: 385 *health = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE; 386 break; 387 default: 388 *health = POWER_SUPPLY_HEALTH_GOOD; 389 break; 390 } 391 392 return 0; 393 } 394 395 static int wm831x_bat_get_prop(struct power_supply *psy, 396 enum power_supply_property psp, 397 union power_supply_propval *val) 398 { 399 struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev.parent); 400 struct wm831x *wm831x = wm831x_power->wm831x; 401 int ret = 0; 402 403 switch (psp) { 404 case POWER_SUPPLY_PROP_STATUS: 405 ret = wm831x_bat_check_status(wm831x, &val->intval); 406 break; 407 case POWER_SUPPLY_PROP_ONLINE: 408 ret = wm831x_power_check_online(wm831x, WM831X_PWR_SRC_BATT, 409 val); 410 break; 411 case POWER_SUPPLY_PROP_VOLTAGE_NOW: 412 ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BATT, val); 413 break; 414 case POWER_SUPPLY_PROP_HEALTH: 415 ret = wm831x_bat_check_health(wm831x, &val->intval); 416 break; 417 case POWER_SUPPLY_PROP_CHARGE_TYPE: 418 ret = wm831x_bat_check_type(wm831x, &val->intval); 419 break; 420 default: 421 ret = -EINVAL; 422 break; 423 } 424 425 return ret; 426 } 427 428 static enum power_supply_property wm831x_bat_props[] = { 429 POWER_SUPPLY_PROP_STATUS, 430 POWER_SUPPLY_PROP_ONLINE, 431 POWER_SUPPLY_PROP_VOLTAGE_NOW, 432 POWER_SUPPLY_PROP_HEALTH, 433 POWER_SUPPLY_PROP_CHARGE_TYPE, 434 }; 435 436 static const char *wm831x_bat_irqs[] = { 437 "BATT HOT", 438 "BATT COLD", 439 "BATT FAIL", 440 "OV", 441 "END", 442 "TO", 443 "MODE", 444 "START", 445 }; 446 447 static irqreturn_t wm831x_bat_irq(int irq, void *data) 448 { 449 struct wm831x_power *wm831x_power = data; 450 struct wm831x *wm831x = wm831x_power->wm831x; 451 452 dev_dbg(wm831x->dev, "Battery status changed: %d\n", irq); 453 454 /* The battery charger is autonomous so we don't need to do 455 * anything except kick user space */ 456 if (wm831x_power->have_battery) 457 power_supply_changed(wm831x_power->battery); 458 459 return IRQ_HANDLED; 460 } 461 462 463 /********************************************************************* 464 * Initialisation 465 *********************************************************************/ 466 467 static irqreturn_t wm831x_syslo_irq(int irq, void *data) 468 { 469 struct wm831x_power *wm831x_power = data; 470 struct wm831x *wm831x = wm831x_power->wm831x; 471 472 /* Not much we can actually *do* but tell people for 473 * posterity, we're probably about to run out of power. */ 474 dev_crit(wm831x->dev, "SYSVDD under voltage\n"); 475 476 return IRQ_HANDLED; 477 } 478 479 static irqreturn_t wm831x_pwr_src_irq(int irq, void *data) 480 { 481 struct wm831x_power *wm831x_power = data; 482 struct wm831x *wm831x = wm831x_power->wm831x; 483 484 dev_dbg(wm831x->dev, "Power source changed\n"); 485 486 /* Just notify for everything - little harm in overnotifying. */ 487 if (wm831x_power->have_battery) 488 power_supply_changed(wm831x_power->battery); 489 power_supply_changed(wm831x_power->usb); 490 power_supply_changed(wm831x_power->wall); 491 492 return IRQ_HANDLED; 493 } 494 495 static int wm831x_power_probe(struct platform_device *pdev) 496 { 497 struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent); 498 struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data; 499 struct wm831x_power *power; 500 int ret, irq, i; 501 502 power = devm_kzalloc(&pdev->dev, sizeof(struct wm831x_power), 503 GFP_KERNEL); 504 if (power == NULL) 505 return -ENOMEM; 506 507 power->wm831x = wm831x; 508 platform_set_drvdata(pdev, power); 509 510 if (wm831x_pdata && wm831x_pdata->wm831x_num) { 511 snprintf(power->wall_name, sizeof(power->wall_name), 512 "wm831x-wall.%d", wm831x_pdata->wm831x_num); 513 snprintf(power->battery_name, sizeof(power->wall_name), 514 "wm831x-battery.%d", wm831x_pdata->wm831x_num); 515 snprintf(power->usb_name, sizeof(power->wall_name), 516 "wm831x-usb.%d", wm831x_pdata->wm831x_num); 517 } else { 518 snprintf(power->wall_name, sizeof(power->wall_name), 519 "wm831x-wall"); 520 snprintf(power->battery_name, sizeof(power->wall_name), 521 "wm831x-battery"); 522 snprintf(power->usb_name, sizeof(power->wall_name), 523 "wm831x-usb"); 524 } 525 526 /* We ignore configuration failures since we can still read back 527 * the status without enabling the charger. 528 */ 529 wm831x_config_battery(wm831x); 530 531 power->wall_desc.name = power->wall_name; 532 power->wall_desc.type = POWER_SUPPLY_TYPE_MAINS; 533 power->wall_desc.properties = wm831x_wall_props; 534 power->wall_desc.num_properties = ARRAY_SIZE(wm831x_wall_props); 535 power->wall_desc.get_property = wm831x_wall_get_prop; 536 power->wall = power_supply_register(&pdev->dev, &power->wall_desc, 537 NULL); 538 if (IS_ERR(power->wall)) { 539 ret = PTR_ERR(power->wall); 540 goto err; 541 } 542 543 power->usb_desc.name = power->usb_name, 544 power->usb_desc.type = POWER_SUPPLY_TYPE_USB; 545 power->usb_desc.properties = wm831x_usb_props; 546 power->usb_desc.num_properties = ARRAY_SIZE(wm831x_usb_props); 547 power->usb_desc.get_property = wm831x_usb_get_prop; 548 power->usb = power_supply_register(&pdev->dev, &power->usb_desc, NULL); 549 if (IS_ERR(power->usb)) { 550 ret = PTR_ERR(power->usb); 551 goto err_wall; 552 } 553 554 ret = wm831x_reg_read(wm831x, WM831X_CHARGER_CONTROL_1); 555 if (ret < 0) 556 goto err_wall; 557 power->have_battery = ret & WM831X_CHG_ENA; 558 559 if (power->have_battery) { 560 power->battery_desc.name = power->battery_name; 561 power->battery_desc.properties = wm831x_bat_props; 562 power->battery_desc.num_properties = ARRAY_SIZE(wm831x_bat_props); 563 power->battery_desc.get_property = wm831x_bat_get_prop; 564 power->battery_desc.use_for_apm = 1; 565 power->battery = power_supply_register(&pdev->dev, 566 &power->battery_desc, 567 NULL); 568 if (IS_ERR(power->battery)) { 569 ret = PTR_ERR(power->battery); 570 goto err_usb; 571 } 572 } 573 574 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); 575 ret = request_threaded_irq(irq, NULL, wm831x_syslo_irq, 576 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "System power low", 577 power); 578 if (ret != 0) { 579 dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n", 580 irq, ret); 581 goto err_battery; 582 } 583 584 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); 585 ret = request_threaded_irq(irq, NULL, wm831x_pwr_src_irq, 586 IRQF_TRIGGER_RISING | IRQF_ONESHOT, "Power source", 587 power); 588 if (ret != 0) { 589 dev_err(&pdev->dev, "Failed to request PWR SRC IRQ %d: %d\n", 590 irq, ret); 591 goto err_syslo; 592 } 593 594 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { 595 irq = wm831x_irq(wm831x, 596 platform_get_irq_byname(pdev, 597 wm831x_bat_irqs[i])); 598 ret = request_threaded_irq(irq, NULL, wm831x_bat_irq, 599 IRQF_TRIGGER_RISING | IRQF_ONESHOT, 600 wm831x_bat_irqs[i], 601 power); 602 if (ret != 0) { 603 dev_err(&pdev->dev, 604 "Failed to request %s IRQ %d: %d\n", 605 wm831x_bat_irqs[i], irq, ret); 606 goto err_bat_irq; 607 } 608 } 609 610 return ret; 611 612 err_bat_irq: 613 --i; 614 for (; i >= 0; i--) { 615 irq = platform_get_irq_byname(pdev, wm831x_bat_irqs[i]); 616 free_irq(irq, power); 617 } 618 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); 619 free_irq(irq, power); 620 err_syslo: 621 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); 622 free_irq(irq, power); 623 err_battery: 624 if (power->have_battery) 625 power_supply_unregister(power->battery); 626 err_usb: 627 power_supply_unregister(power->usb); 628 err_wall: 629 power_supply_unregister(power->wall); 630 err: 631 return ret; 632 } 633 634 static int wm831x_power_remove(struct platform_device *pdev) 635 { 636 struct wm831x_power *wm831x_power = platform_get_drvdata(pdev); 637 struct wm831x *wm831x = wm831x_power->wm831x; 638 int irq, i; 639 640 for (i = 0; i < ARRAY_SIZE(wm831x_bat_irqs); i++) { 641 irq = wm831x_irq(wm831x, 642 platform_get_irq_byname(pdev, 643 wm831x_bat_irqs[i])); 644 free_irq(irq, wm831x_power); 645 } 646 647 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "PWR SRC")); 648 free_irq(irq, wm831x_power); 649 650 irq = wm831x_irq(wm831x, platform_get_irq_byname(pdev, "SYSLO")); 651 free_irq(irq, wm831x_power); 652 653 if (wm831x_power->have_battery) 654 power_supply_unregister(wm831x_power->battery); 655 power_supply_unregister(wm831x_power->wall); 656 power_supply_unregister(wm831x_power->usb); 657 return 0; 658 } 659 660 static struct platform_driver wm831x_power_driver = { 661 .probe = wm831x_power_probe, 662 .remove = wm831x_power_remove, 663 .driver = { 664 .name = "wm831x-power", 665 }, 666 }; 667 668 module_platform_driver(wm831x_power_driver); 669 670 MODULE_DESCRIPTION("Power supply driver for WM831x PMICs"); 671 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 672 MODULE_LICENSE("GPL"); 673 MODULE_ALIAS("platform:wm831x-power"); 674