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