drivers/mfd/pcf50633-core.c

   1 /* NXP PCF50633 Power Management Unit (PMU) driver
   2  *
   3  * (C) 2006-2008 by Openmoko, Inc.
   4  * Author: Harald Welte <laforge@openmoko.org>
   5  *         Balaji Rao <balajirrao@openmoko.org>
   6  * All rights reserved.
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  *
  13  */
  14
  15 #include <linux/kernel.h>
  16 #include <linux/device.h>
  17 #include <linux/sysfs.h>
  18 #include <linux/module.h>
  19 #include <linux/types.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/workqueue.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/i2c.h>
  24 #include <linux/irq.h>
  25 #include <linux/slab.h>
  26
  27 #include <linux/mfd/pcf50633/core.h>
  28
  29 /* Two MBCS registers used during cold start */
  30 #define PCF50633_REG_MBCS1              0x4b
  31 #define PCF50633_REG_MBCS2              0x4c
  32 #define PCF50633_MBCS1_USBPRES          0x01
  33 #define PCF50633_MBCS1_ADAPTPRES        0x01
  34
  35 static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
  36 {
  37         int ret;
  38
  39         ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
  40                                 num, data);
  41         if (ret < 0)
  42                 dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
  43
  44         return ret;
  45 }
  46
  47 static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
  48 {
  49         int ret;
  50
  51         ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
  52                                 num, data);
  53         if (ret < 0)
  54                 dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
  55
  56         return ret;
  57
  58 }
  59
  60 /* Read a block of upto 32 regs  */
  61 int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
  62                                         int nr_regs, u8 *data)
  63 {
  64         int ret;
  65
  66         mutex_lock(&pcf->lock);
  67         ret = __pcf50633_read(pcf, reg, nr_regs, data);
  68         mutex_unlock(&pcf->lock);
  69
  70         return ret;
  71 }
  72 EXPORT_SYMBOL_GPL(pcf50633_read_block);
  73
  74 /* Write a block of upto 32 regs  */
  75 int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
  76                                         int nr_regs, u8 *data)
  77 {
  78         int ret;
  79
  80         mutex_lock(&pcf->lock);
  81         ret = __pcf50633_write(pcf, reg, nr_regs, data);
  82         mutex_unlock(&pcf->lock);
  83
  84         return ret;
  85 }
  86 EXPORT_SYMBOL_GPL(pcf50633_write_block);
  87
  88 u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
  89 {
  90         u8 val;
  91
  92         mutex_lock(&pcf->lock);
  93         __pcf50633_read(pcf, reg, 1, &val);
  94         mutex_unlock(&pcf->lock);
  95
  96         return val;
  97 }
  98 EXPORT_SYMBOL_GPL(pcf50633_reg_read);
  99
 100 int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
 101 {
 102         int ret;
 103
 104         mutex_lock(&pcf->lock);
 105         ret = __pcf50633_write(pcf, reg, 1, &val);
 106         mutex_unlock(&pcf->lock);
 107
 108         return ret;
 109 }
 110 EXPORT_SYMBOL_GPL(pcf50633_reg_write);
 111
 112 int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
 113 {
 114         int ret;
 115         u8 tmp;
 116
 117         val &= mask;
 118
 119         mutex_lock(&pcf->lock);
 120         ret = __pcf50633_read(pcf, reg, 1, &tmp);
 121         if (ret < 0)
 122                 goto out;
 123
 124         tmp &= ~mask;
 125         tmp |= val;
 126         ret = __pcf50633_write(pcf, reg, 1, &tmp);
 127
 128 out:
 129         mutex_unlock(&pcf->lock);
 130
 131         return ret;
 132 }
 133 EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
 134
 135 int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
 136 {
 137         int ret;
 138         u8 tmp;
 139
 140         mutex_lock(&pcf->lock);
 141         ret = __pcf50633_read(pcf, reg, 1, &tmp);
 142         if (ret < 0)
 143                 goto out;
 144
 145         tmp &= ~val;
 146         ret = __pcf50633_write(pcf, reg, 1, &tmp);
 147
 148 out:
 149         mutex_unlock(&pcf->lock);
 150
 151         return ret;
 152 }
 153 EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
 154
 155 /* sysfs attributes */
 156 static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
 157                             char *buf)
 158 {
 159         struct pcf50633 *pcf = dev_get_drvdata(dev);
 160         u8 dump[16];
 161         int n, n1, idx = 0;
 162         char *buf1 = buf;
 163         static u8 address_no_read[] = { /* must be ascending */
 164                 PCF50633_REG_INT1,
 165                 PCF50633_REG_INT2,
 166                 PCF50633_REG_INT3,
 167                 PCF50633_REG_INT4,
 168                 PCF50633_REG_INT5,
 169                 0 /* terminator */
 170         };
 171
 172         for (n = 0; n < 256; n += sizeof(dump)) {
 173                 for (n1 = 0; n1 < sizeof(dump); n1++)
 174                         if (n == address_no_read[idx]) {
 175                                 idx++;
 176                                 dump[n1] = 0x00;
 177                         } else
 178                                 dump[n1] = pcf50633_reg_read(pcf, n + n1);
 179
 180                 hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
 181                 buf1 += strlen(buf1);
 182                 *buf1++ = '\n';
 183                 *buf1 = '\0';
 184         }
 185
 186         return buf1 - buf;
 187 }
 188 static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
 189
 190 static ssize_t show_resume_reason(struct device *dev,
 191                                 struct device_attribute *attr, char *buf)
 192 {
 193         struct pcf50633 *pcf = dev_get_drvdata(dev);
 194         int n;
 195
 196         n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
 197                                 pcf->resume_reason[0],
 198                                 pcf->resume_reason[1],
 199                                 pcf->resume_reason[2],
 200                                 pcf->resume_reason[3],
 201                                 pcf->resume_reason[4]);
 202
 203         return n;
 204 }
 205 static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
 206
 207 static struct attribute *pcf_sysfs_entries[] = {
 208         &dev_attr_dump_regs.attr,
 209         &dev_attr_resume_reason.attr,
 210         NULL,
 211 };
 212
 213 static struct attribute_group pcf_attr_group = {
 214         .name   = NULL,                 /* put in device directory */
 215         .attrs  = pcf_sysfs_entries,
 216 };
 217
 218 int pcf50633_register_irq(struct pcf50633 *pcf, int irq,
 219                         void (*handler) (int, void *), void *data)
 220 {
 221         if (irq < 0 || irq > PCF50633_NUM_IRQ || !handler)
 222                 return -EINVAL;
 223
 224         if (WARN_ON(pcf->irq_handler[irq].handler))
 225                 return -EBUSY;
 226
 227         mutex_lock(&pcf->lock);
 228         pcf->irq_handler[irq].handler = handler;
 229         pcf->irq_handler[irq].data = data;
 230         mutex_unlock(&pcf->lock);
 231
 232         return 0;
 233 }
 234 EXPORT_SYMBOL_GPL(pcf50633_register_irq);
 235
 236 int pcf50633_free_irq(struct pcf50633 *pcf, int irq)
 237 {
 238         if (irq < 0 || irq > PCF50633_NUM_IRQ)
 239                 return -EINVAL;
 240
 241         mutex_lock(&pcf->lock);
 242         pcf->irq_handler[irq].handler = NULL;
 243         mutex_unlock(&pcf->lock);
 244
 245         return 0;
 246 }
 247 EXPORT_SYMBOL_GPL(pcf50633_free_irq);
 248
 249 static int __pcf50633_irq_mask_set(struct pcf50633 *pcf, int irq, u8 mask)
 250 {
 251         u8 reg, bits, tmp;
 252         int ret = 0, idx;
 253
 254         idx = irq >> 3;
 255         reg =  PCF50633_REG_INT1M + idx;
 256         bits = 1 << (irq & 0x07);
 257
 258         mutex_lock(&pcf->lock);
 259
 260         if (mask) {
 261                 ret = __pcf50633_read(pcf, reg, 1, &tmp);
 262                 if (ret < 0)
 263                         goto out;
 264
 265                 tmp |= bits;
 266
 267                 ret = __pcf50633_write(pcf, reg, 1, &tmp);
 268                 if (ret < 0)
 269                         goto out;
 270
 271                 pcf->mask_regs[idx] &= ~bits;
 272                 pcf->mask_regs[idx] |= bits;
 273         } else {
 274                 ret = __pcf50633_read(pcf, reg, 1, &tmp);
 275                 if (ret < 0)
 276                         goto out;
 277
 278                 tmp &= ~bits;
 279
 280                 ret = __pcf50633_write(pcf, reg, 1, &tmp);
 281                 if (ret < 0)
 282                         goto out;
 283
 284                 pcf->mask_regs[idx] &= ~bits;
 285         }
 286 out:
 287         mutex_unlock(&pcf->lock);
 288
 289         return ret;
 290 }
 291
 292 int pcf50633_irq_mask(struct pcf50633 *pcf, int irq)
 293 {
 294         dev_dbg(pcf->dev, "Masking IRQ %d\n", irq);
 295
 296         return __pcf50633_irq_mask_set(pcf, irq, 1);
 297 }
 298 EXPORT_SYMBOL_GPL(pcf50633_irq_mask);
 299
 300 int pcf50633_irq_unmask(struct pcf50633 *pcf, int irq)
 301 {
 302         dev_dbg(pcf->dev, "Unmasking IRQ %d\n", irq);
 303
 304         return __pcf50633_irq_mask_set(pcf, irq, 0);
 305 }
 306 EXPORT_SYMBOL_GPL(pcf50633_irq_unmask);
 307
 308 int pcf50633_irq_mask_get(struct pcf50633 *pcf, int irq)
 309 {
 310         u8 reg, bits;
 311
 312         reg =  irq >> 3;
 313         bits = 1 << (irq & 0x07);
 314
 315         return pcf->mask_regs[reg] & bits;
 316 }
 317 EXPORT_SYMBOL_GPL(pcf50633_irq_mask_get);
 318
 319 static void pcf50633_irq_call_handler(struct pcf50633 *pcf, int irq)
 320 {
 321         if (pcf->irq_handler[irq].handler)
 322                 pcf->irq_handler[irq].handler(irq, pcf->irq_handler[irq].data);
 323 }
 324
 325 /* Maximum amount of time ONKEY is held before emergency action is taken */
 326 #define PCF50633_ONKEY1S_TIMEOUT 8
 327
 328 static void pcf50633_irq_worker(struct work_struct *work)
 329 {
 330         struct pcf50633 *pcf;
 331         int ret, i, j;
 332         u8 pcf_int[5], chgstat;
 333
 334         pcf = container_of(work, struct pcf50633, irq_work);
 335
 336         /* Read the 5 INT regs in one transaction */
 337         ret = pcf50633_read_block(pcf, PCF50633_REG_INT1,
 338                                                 ARRAY_SIZE(pcf_int), pcf_int);
 339         if (ret != ARRAY_SIZE(pcf_int)) {
 340                 dev_err(pcf->dev, "Error reading INT registers\n");
 341
 342                 /*
 343                  * If this doesn't ACK the interrupt to the chip, we'll be
 344                  * called once again as we're level triggered.
 345                  */
 346                 goto out;
 347         }
 348
 349         /* defeat 8s death from lowsys on A5 */
 350         pcf50633_reg_write(pcf, PCF50633_REG_OOCSHDWN,  0x04);
 351
 352         /* We immediately read the usb and adapter status. We thus make sure
 353          * only of USBINS/USBREM IRQ handlers are called */
 354         if (pcf_int[0] & (PCF50633_INT1_USBINS | PCF50633_INT1_USBREM)) {
 355                 chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
 356                 if (chgstat & (0x3 << 4))
 357                         pcf_int[0] &= ~(1 << PCF50633_INT1_USBREM);
 358                 else
 359                         pcf_int[0] &= ~(1 << PCF50633_INT1_USBINS);
 360         }
 361
 362         /* Make sure only one of ADPINS or ADPREM is set */
 363         if (pcf_int[0] & (PCF50633_INT1_ADPINS | PCF50633_INT1_ADPREM)) {
 364                 chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
 365                 if (chgstat & (0x3 << 4))
 366                         pcf_int[0] &= ~(1 << PCF50633_INT1_ADPREM);
 367                 else
 368                         pcf_int[0] &= ~(1 << PCF50633_INT1_ADPINS);
 369         }
 370
 371         dev_dbg(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x "
 372                         "INT4=0x%02x INT5=0x%02x\n", pcf_int[0],
 373                         pcf_int[1], pcf_int[2], pcf_int[3], pcf_int[4]);
 374
 375         /* Some revisions of the chip don't have a 8s standby mode on
 376          * ONKEY1S press. We try to manually do it in such cases. */
 377         if ((pcf_int[0] & PCF50633_INT1_SECOND) && pcf->onkey1s_held) {
 378                 dev_info(pcf->dev, "ONKEY1S held for %d secs\n",
 379                                                         pcf->onkey1s_held);
 380                 if (pcf->onkey1s_held++ == PCF50633_ONKEY1S_TIMEOUT)
 381                         if (pcf->pdata->force_shutdown)
 382                                 pcf->pdata->force_shutdown(pcf);
 383         }
 384
 385         if (pcf_int[2] & PCF50633_INT3_ONKEY1S) {
 386                 dev_info(pcf->dev, "ONKEY1S held\n");
 387                 pcf->onkey1s_held = 1 ;
 388
 389                 /* Unmask IRQ_SECOND */
 390                 pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M,
 391                                                 PCF50633_INT1_SECOND);
 392
 393                 /* Unmask IRQ_ONKEYR */
 394                 pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT2M,
 395                                                 PCF50633_INT2_ONKEYR);
 396         }
 397
 398         if ((pcf_int[1] & PCF50633_INT2_ONKEYR) && pcf->onkey1s_held) {
 399                 pcf->onkey1s_held = 0;
 400
 401                 /* Mask SECOND and ONKEYR interrupts */
 402                 if (pcf->mask_regs[0] & PCF50633_INT1_SECOND)
 403                         pcf50633_reg_set_bit_mask(pcf,
 404                                         PCF50633_REG_INT1M,
 405                                         PCF50633_INT1_SECOND,
 406                                         PCF50633_INT1_SECOND);
 407
 408                 if (pcf->mask_regs[1] & PCF50633_INT2_ONKEYR)
 409                         pcf50633_reg_set_bit_mask(pcf,
 410                                         PCF50633_REG_INT2M,
 411                                         PCF50633_INT2_ONKEYR,
 412                                         PCF50633_INT2_ONKEYR);
 413         }
 414
 415         /* Have we just resumed ? */
 416         if (pcf->is_suspended) {
 417                 pcf->is_suspended = 0;
 418
 419                 /* Set the resume reason filtering out non resumers */
 420                 for (i = 0; i < ARRAY_SIZE(pcf_int); i++)
 421                         pcf->resume_reason[i] = pcf_int[i] &
 422                                                 pcf->pdata->resumers[i];
 423
 424                 /* Make sure we don't pass on any ONKEY events to
 425                  * userspace now */
 426                 pcf_int[1] &= ~(PCF50633_INT2_ONKEYR | PCF50633_INT2_ONKEYF);
 427         }
 428
 429         for (i = 0; i < ARRAY_SIZE(pcf_int); i++) {
 430                 /* Unset masked interrupts */
 431                 pcf_int[i] &= ~pcf->mask_regs[i];
 432
 433                 for (j = 0; j < 8 ; j++)
 434                         if (pcf_int[i] & (1 << j))
 435                                 pcf50633_irq_call_handler(pcf, (i * 8) + j);
 436         }
 437
 438 out:
 439         put_device(pcf->dev);
 440         enable_irq(pcf->irq);
 441 }
 442
 443 static irqreturn_t pcf50633_irq(int irq, void *data)
 444 {
 445         struct pcf50633 *pcf = data;
 446
 447         dev_dbg(pcf->dev, "pcf50633_irq\n");
 448
 449         get_device(pcf->dev);
 450         disable_irq_nosync(pcf->irq);
 451         queue_work(pcf->work_queue, &pcf->irq_work);
 452
 453         return IRQ_HANDLED;
 454 }
 455
 456 static void
 457 pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
 458                                                 struct platform_device **pdev)
 459 {
 460         int ret;
 461
 462         *pdev = platform_device_alloc(name, -1);
 463         if (!*pdev) {
 464                 dev_err(pcf->dev, "Falied to allocate %s\n", name);
 465                 return;
 466         }
 467
 468         (*pdev)->dev.parent = pcf->dev;
 469
 470         ret = platform_device_add(*pdev);
 471         if (ret) {
 472                 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
 473                 platform_device_put(*pdev);
 474                 *pdev = NULL;
 475         }
 476 }
 477
 478 #ifdef CONFIG_PM
 479 static int pcf50633_suspend(struct i2c_client *client, pm_message_t state)
 480 {
 481         struct pcf50633 *pcf;
 482         int ret = 0, i;
 483         u8 res[5];
 484
 485         pcf = i2c_get_clientdata(client);
 486
 487         /* Make sure our interrupt handlers are not called
 488          * henceforth */
 489         disable_irq(pcf->irq);
 490
 491         /* Make sure that any running IRQ worker has quit */
 492         cancel_work_sync(&pcf->irq_work);
 493
 494         /* Save the masks */
 495         ret = pcf50633_read_block(pcf, PCF50633_REG_INT1M,
 496                                 ARRAY_SIZE(pcf->suspend_irq_masks),
 497                                         pcf->suspend_irq_masks);
 498         if (ret < 0) {
 499                 dev_err(pcf->dev, "error saving irq masks\n");
 500                 goto out;
 501         }
 502
 503         /* Write wakeup irq masks */
 504         for (i = 0; i < ARRAY_SIZE(res); i++)
 505                 res[i] = ~pcf->pdata->resumers[i];
 506
 507         ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
 508                                         ARRAY_SIZE(res), &res[0]);
 509         if (ret < 0) {
 510                 dev_err(pcf->dev, "error writing wakeup irq masks\n");
 511                 goto out;
 512         }
 513
 514         pcf->is_suspended = 1;
 515
 516 out:
 517         return ret;
 518 }
 519
 520 static int pcf50633_resume(struct i2c_client *client)
 521 {
 522         struct pcf50633 *pcf;
 523         int ret;
 524
 525         pcf = i2c_get_clientdata(client);
 526
 527         /* Write the saved mask registers */
 528         ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
 529                                 ARRAY_SIZE(pcf->suspend_irq_masks),
 530                                         pcf->suspend_irq_masks);
 531         if (ret < 0)
 532                 dev_err(pcf->dev, "Error restoring saved suspend masks\n");
 533
 534         /* Restore regulators' state */
 535
 536
 537         get_device(pcf->dev);
 538
 539         /*
 540          * Clear any pending interrupts and set resume reason if any.
 541          * This will leave with enable_irq()
 542          */
 543         pcf50633_irq_worker(&pcf->irq_work);
 544
 545         return 0;
 546 }
 547 #else
 548 #define pcf50633_suspend NULL
 549 #define pcf50633_resume NULL
 550 #endif
 551
 552 static int __devinit pcf50633_probe(struct i2c_client *client,
 553                                 const struct i2c_device_id *ids)
 554 {
 555         struct pcf50633 *pcf;
 556         struct pcf50633_platform_data *pdata = client->dev.platform_data;
 557         int i, ret;
 558         int version, variant;
 559
 560         if (!client->irq) {
 561                 dev_err(&client->dev, "Missing IRQ\n");
 562                 return -ENOENT;
 563         }
 564
 565         pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
 566         if (!pcf)
 567                 return -ENOMEM;
 568
 569         pcf->pdata = pdata;
 570
 571         mutex_init(&pcf->lock);
 572
 573         i2c_set_clientdata(client, pcf);
 574         pcf->dev = &client->dev;
 575         pcf->i2c_client = client;
 576         pcf->irq = client->irq;
 577         pcf->work_queue = create_singlethread_workqueue("pcf50633");
 578
 579         if (!pcf->work_queue) {
 580                 dev_err(&client->dev, "Failed to alloc workqueue\n");
 581                 ret = -ENOMEM;
 582                 goto err_free;
 583         }
 584
 585         INIT_WORK(&pcf->irq_work, pcf50633_irq_worker);
 586
 587         version = pcf50633_reg_read(pcf, 0);
 588         variant = pcf50633_reg_read(pcf, 1);
 589         if (version < 0 || variant < 0) {
 590                 dev_err(pcf->dev, "Unable to probe pcf50633\n");
 591                 ret = -ENODEV;
 592                 goto err_destroy_workqueue;
 593         }
 594
 595         dev_info(pcf->dev, "Probed device version %d variant %d\n",
 596                                                         version, variant);
 597
 598         /* Enable all interrupts except RTC SECOND */
 599         pcf->mask_regs[0] = 0x80;
 600         pcf50633_reg_write(pcf, PCF50633_REG_INT1M, pcf->mask_regs[0]);
 601         pcf50633_reg_write(pcf, PCF50633_REG_INT2M, 0x00);
 602         pcf50633_reg_write(pcf, PCF50633_REG_INT3M, 0x00);
 603         pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00);
 604         pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00);
 605
 606         ret = request_irq(client->irq, pcf50633_irq,
 607                                         IRQF_TRIGGER_LOW, "pcf50633", pcf);
 608
 609         if (ret) {
 610                 dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
 611                 goto err_destroy_workqueue;
 612         }
 613
 614         /* Create sub devices */
 615         pcf50633_client_dev_register(pcf, "pcf50633-input",
 616                                                 &pcf->input_pdev);
 617         pcf50633_client_dev_register(pcf, "pcf50633-rtc",
 618                                                 &pcf->rtc_pdev);
 619         pcf50633_client_dev_register(pcf, "pcf50633-mbc",
 620                                                 &pcf->mbc_pdev);
 621         pcf50633_client_dev_register(pcf, "pcf50633-adc",
 622                                                 &pcf->adc_pdev);
 623         pcf50633_client_dev_register(pcf, "pcf50633-backlight",
 624                                                 &pcf->bl_pdev);
 625
 626
 627         for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
 628                 struct platform_device *pdev;
 629
 630                 pdev = platform_device_alloc("pcf50633-regltr", i);
 631                 if (!pdev) {
 632                         dev_err(pcf->dev, "Cannot create regulator %d\n", i);
 633                         continue;
 634                 }
 635
 636                 pdev->dev.parent = pcf->dev;
 637                 platform_device_add_data(pdev, &pdata->reg_init_data[i],
 638                                         sizeof(pdata->reg_init_data[i]));
 639                 pcf->regulator_pdev[i] = pdev;
 640
 641                 platform_device_add(pdev);
 642         }
 643
 644         if (enable_irq_wake(client->irq) < 0)
 645                 dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source"
 646                         "in this hardware revision", client->irq);
 647
 648         ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
 649         if (ret)
 650                 dev_err(pcf->dev, "error creating sysfs entries\n");
 651
 652         if (pdata->probe_done)
 653                 pdata->probe_done(pcf);
 654
 655         return 0;
 656
 657 err_destroy_workqueue:
 658         destroy_workqueue(pcf->work_queue);
 659 err_free:
 660         i2c_set_clientdata(client, NULL);
 661         kfree(pcf);
 662
 663         return ret;
 664 }
 665
 666 static int __devexit pcf50633_remove(struct i2c_client *client)
 667 {
 668         struct pcf50633 *pcf = i2c_get_clientdata(client);
 669         int i;
 670
 671         free_irq(pcf->irq, pcf);
 672         destroy_workqueue(pcf->work_queue);
 673
 674         platform_device_unregister(pcf->input_pdev);
 675         platform_device_unregister(pcf->rtc_pdev);
 676         platform_device_unregister(pcf->mbc_pdev);
 677         platform_device_unregister(pcf->adc_pdev);
 678
 679         for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
 680                 platform_device_unregister(pcf->regulator_pdev[i]);
 681
 682         kfree(pcf);
 683
 684         return 0;
 685 }
 686
 687 static struct i2c_device_id pcf50633_id_table[] = {
 688         {"pcf50633", 0x73},
 689         {/* end of list */}
 690 };
 691
 692 static struct i2c_driver pcf50633_driver = {
 693         .driver = {
 694                 .name   = "pcf50633",
 695         },
 696         .id_table = pcf50633_id_table,
 697         .probe = pcf50633_probe,
 698         .remove = __devexit_p(pcf50633_remove),
 699         .suspend = pcf50633_suspend,
 700         .resume = pcf50633_resume,
 701 };
 702
 703 static int __init pcf50633_init(void)
 704 {
 705         return i2c_add_driver(&pcf50633_driver);
 706 }
 707
 708 static void __exit pcf50633_exit(void)
 709 {
 710         i2c_del_driver(&pcf50633_driver);
 711 }
 712
 713 MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
 714 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
 715 MODULE_LICENSE("GPL");
 716
 717 subsys_initcall(pcf50633_init);
 718 module_exit(pcf50633_exit);