5006746ff5c4cac44f4a0d559297048afb8ee525
[kernel.git] / 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/device.h>
19 #include <linux/module.h>
20 #include <linux/types.h>
21 #include <linux/interrupt.h>
22 #include <linux/workqueue.h>
23 #include <linux/platform_device.h>
24 #include <linux/i2c.h>
25 #include <linux/irq.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_info(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_info(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         pcf50633_reg_write(pcf, PCF50633_REG_OOCSHDWN,  0x04 );  /* defeat 8s death from lowsys on A5 */
350
351         /* We immediately read the usb and adapter status. We thus make sure
352          * only of USBINS/USBREM IRQ handlers are called */
353         if (pcf_int[0] & (PCF50633_INT1_USBINS | PCF50633_INT1_USBREM)) {
354                 chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
355                 if (chgstat & (0x3 << 4))
356                         pcf_int[0] &= ~(1 << PCF50633_INT1_USBREM);
357                 else
358                         pcf_int[0] &= ~(1 << PCF50633_INT1_USBINS);
359         }
360
361         /* Make sure only one of ADPINS or ADPREM is set */
362         if (pcf_int[0] & (PCF50633_INT1_ADPINS | PCF50633_INT1_ADPREM)) {
363                 chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
364                 if (chgstat & (0x3 << 4))
365                         pcf_int[0] &= ~(1 << PCF50633_INT1_ADPREM);
366                 else
367                         pcf_int[0] &= ~(1 << PCF50633_INT1_ADPINS);
368         }
369
370         dev_dbg(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x "
371                         "INT4=0x%02x INT5=0x%02x\n", pcf_int[0],
372                         pcf_int[1], pcf_int[2], pcf_int[3], pcf_int[4]);
373
374         /* Some revisions of the chip don't have a 8s standby mode on
375          * ONKEY1S press. We try to manually do it in such cases. */
376         if ((pcf_int[0] & PCF50633_INT1_SECOND) && pcf->onkey1s_held) {
377                 dev_info(pcf->dev, "ONKEY1S held for %d secs\n",
378                                                         pcf->onkey1s_held);
379                 if (pcf->onkey1s_held++ == PCF50633_ONKEY1S_TIMEOUT)
380                         if (pcf->pdata->force_shutdown)
381                                 pcf->pdata->force_shutdown(pcf);
382         }
383
384         if (pcf_int[2] & PCF50633_INT3_ONKEY1S) {
385                 dev_info(pcf->dev, "ONKEY1S held\n");
386                 pcf->onkey1s_held = 1 ;
387
388                 /* Unmask IRQ_SECOND */
389                 pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M,
390                                                 PCF50633_INT1_SECOND);
391
392                 /* Unmask IRQ_ONKEYR */
393                 pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT2M,
394                                                 PCF50633_INT2_ONKEYR);
395         }
396
397         if ((pcf_int[1] & PCF50633_INT2_ONKEYR) && pcf->onkey1s_held) {
398                 pcf->onkey1s_held = 0;
399
400                 /* Mask SECOND and ONKEYR interrupts */
401                 if (pcf->mask_regs[0] & PCF50633_INT1_SECOND)
402                         pcf50633_reg_set_bit_mask(pcf,
403                                         PCF50633_REG_INT1M,
404                                         PCF50633_INT1_SECOND,
405                                         PCF50633_INT1_SECOND);
406
407                 if (pcf->mask_regs[1] & PCF50633_INT2_ONKEYR)
408                         pcf50633_reg_set_bit_mask(pcf,
409                                         PCF50633_REG_INT2M,
410                                         PCF50633_INT2_ONKEYR,
411                                         PCF50633_INT2_ONKEYR);
412         }
413
414         /* Have we just resumed ? */
415         if (pcf->is_suspended) {
416                 pcf->is_suspended = 0;
417
418                 /* Set the resume reason filtering out non resumers */
419                 for (i = 0; i < ARRAY_SIZE(pcf_int); i++)
420                         pcf->resume_reason[i] = pcf_int[i] &
421                                                 pcf->pdata->resumers[i];
422
423                 /* Make sure we don't pass on any ONKEY events to
424                  * userspace now */
425                 pcf_int[1] &= ~(PCF50633_INT2_ONKEYR | PCF50633_INT2_ONKEYF);
426         }
427
428         for (i = 0; i < ARRAY_SIZE(pcf_int); i++) {
429                 /* Unset masked interrupts */
430                 pcf_int[i] &= ~pcf->mask_regs[i];
431
432                 for (j = 0; j < 8 ; j++)
433                         if (pcf_int[i] & (1 << j))
434                                 pcf50633_irq_call_handler(pcf, (i * 8) + j);
435         }
436
437 out:
438         put_device(pcf->dev);
439         enable_irq(pcf->irq);
440 }
441
442 static irqreturn_t pcf50633_irq(int irq, void *data)
443 {
444         struct pcf50633 *pcf = data;
445
446         dev_dbg(pcf->dev, "pcf50633_irq\n");
447
448         get_device(pcf->dev);
449         disable_irq(pcf->irq);
450
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         struct pcf50633_subdev_pdata *subdev_pdata;
461         int ret;
462
463         *pdev = platform_device_alloc(name, -1);
464         if (!*pdev) {
465                 dev_err(pcf->dev, "Falied to allocate %s\n", name);
466                 return;
467         }
468
469         subdev_pdata = kmalloc(sizeof(*subdev_pdata), GFP_KERNEL);
470         if (!subdev_pdata) {
471                 dev_err(pcf->dev, "Error allocating subdev pdata\n");
472                 platform_device_put(*pdev);
473         }
474
475         subdev_pdata->pcf = pcf;
476         platform_device_add_data(*pdev, subdev_pdata, sizeof(*subdev_pdata));
477
478         (*pdev)->dev.parent = pcf->dev;
479
480         ret = platform_device_add(*pdev);
481         if (ret) {
482                 dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
483                 platform_device_put(*pdev);
484                 *pdev = NULL;
485         }
486 }
487
488 #ifdef CONFIG_PM
489 static int pcf50633_suspend(struct device *dev, pm_message_t state)
490 {
491         struct pcf50633 *pcf;
492         int ret = 0, i;
493         u8 res[5];
494
495         pcf = dev_get_drvdata(dev);
496
497         /* Make sure our interrupt handlers are not called
498          * henceforth */
499         disable_irq(pcf->irq);
500
501         /* Make sure that any running IRQ worker has quit */
502         cancel_work_sync(&pcf->irq_work);
503
504         /* Save the masks */
505         ret = pcf50633_read_block(pcf, PCF50633_REG_INT1M,
506                                 ARRAY_SIZE(pcf->suspend_irq_masks),
507                                         pcf->suspend_irq_masks);
508         if (ret < 0) {
509                 dev_err(pcf->dev, "error saving irq masks\n");
510                 goto out;
511         }
512
513         /* Write wakeup irq masks */
514         for (i = 0; i < ARRAY_SIZE(res); i++)
515                 res[i] = ~pcf->pdata->resumers[i];
516
517         ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
518                                         ARRAY_SIZE(res), &res[0]);
519         if (ret < 0) {
520                 dev_err(pcf->dev, "error writing wakeup irq masks\n");
521                 goto out;
522         }
523
524         pcf->is_suspended = 1;
525
526 out:
527         return ret;
528 }
529
530 static int pcf50633_resume(struct device *dev)
531 {
532         struct pcf50633 *pcf;
533         int ret;
534
535         pcf = dev_get_drvdata(dev);
536
537         /* Write the saved mask registers */
538         ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
539                                 ARRAY_SIZE(pcf->suspend_irq_masks),
540                                         pcf->suspend_irq_masks);
541         if (ret < 0)
542                 dev_err(pcf->dev, "Error restoring saved suspend masks\n");
543
544         /* Restore regulators' state */
545
546
547         get_device(pcf->dev);
548
549         /*
550          * Clear any pending interrupts and set resume reason if any.
551          * This will leave with enable_irq()
552          */
553         pcf50633_irq_worker(&pcf->irq_work);
554
555         return 0;
556 }
557 #else
558 #define pcf50633_suspend NULL
559 #define pcf50633_resume NULL
560 #endif
561
562 static int __devinit pcf50633_probe(struct i2c_client *client,
563                                 const struct i2c_device_id *ids)
564 {
565         struct pcf50633 *pcf;
566         struct pcf50633_platform_data *pdata = client->dev.platform_data;
567         int i, ret = 0;
568         int version, variant;
569
570         pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
571         if (!pcf)
572                 return -ENOMEM;
573
574         pcf->pdata = pdata;
575
576         mutex_init(&pcf->lock);
577
578         i2c_set_clientdata(client, pcf);
579         pcf->dev = &client->dev;
580         pcf->i2c_client = client;
581         pcf->irq = client->irq;
582         pcf->work_queue = create_singlethread_workqueue("pcf50633");
583
584         INIT_WORK(&pcf->irq_work, pcf50633_irq_worker);
585
586         version = pcf50633_reg_read(pcf, 0);
587         variant = pcf50633_reg_read(pcf, 1);
588         if (version < 0 || variant < 0) {
589                 dev_err(pcf->dev, "Unable to probe pcf50633\n");
590                 ret = -ENODEV;
591                 goto err;
592         }
593
594         dev_info(pcf->dev, "Probed device version %d variant %d\n",
595                                                         version, variant);
596
597         /* Enable all interrupts except RTC SECOND */
598         pcf->mask_regs[0] = 0x80;
599         pcf50633_reg_write(pcf, PCF50633_REG_INT1M, pcf->mask_regs[0]);
600         pcf50633_reg_write(pcf, PCF50633_REG_INT2M, 0x00);
601         pcf50633_reg_write(pcf, PCF50633_REG_INT3M, 0x00);
602         pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00);
603         pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00);
604
605         /* Create sub devices */
606         pcf50633_client_dev_register(pcf, "pcf50633-input",
607                                                 &pcf->input_pdev);
608         pcf50633_client_dev_register(pcf, "pcf50633-rtc",
609                                                 &pcf->rtc_pdev);
610         pcf50633_client_dev_register(pcf, "pcf50633-mbc",
611                                                 &pcf->mbc_pdev);
612         pcf50633_client_dev_register(pcf, "pcf50633-adc",
613                                                 &pcf->adc_pdev);
614
615         for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
616                 struct platform_device *pdev;
617
618                 pdev = platform_device_alloc("pcf50633-regltr", i);
619                 if (!pdev) {
620                         dev_err(pcf->dev, "Cannot create regulator\n");
621                         continue;
622                 }
623
624                 pdev->dev.parent = pcf->dev;
625                 pdev->dev.platform_data = &pdata->reg_init_data[i];
626                 pdev->dev.driver_data = pcf;
627                 pcf->regulator_pdev[i] = pdev;
628
629                 platform_device_add(pdev);
630         }
631
632         if (client->irq) {
633                 set_irq_handler(client->irq, handle_level_irq);
634                 ret = request_irq(client->irq, pcf50633_irq,
635                                 IRQF_TRIGGER_LOW, "pcf50633", pcf);
636
637                 if (ret) {
638                         dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
639                         goto err;
640                 }
641         } else {
642                 dev_err(pcf->dev, "No IRQ configured\n");
643                 goto err;
644         }
645
646         if (enable_irq_wake(client->irq) < 0)
647                 dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source"
648                         "in this hardware revision", client->irq);
649
650         ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
651         if (ret)
652                 dev_err(pcf->dev, "error creating sysfs entries\n");
653
654         if (pdata->probe_done)
655                 pdata->probe_done(pcf);
656
657         return 0;
658
659 err:
660         destroy_workqueue(pcf->work_queue);
661         kfree(pcf);
662         return ret;
663 }
664
665 static int __devexit pcf50633_remove(struct i2c_client *client)
666 {
667         struct pcf50633 *pcf = i2c_get_clientdata(client);
668         int i;
669
670         free_irq(pcf->irq, pcf);
671         destroy_workqueue(pcf->work_queue);
672
673         platform_device_unregister(pcf->input_pdev);
674         platform_device_unregister(pcf->rtc_pdev);
675         platform_device_unregister(pcf->mbc_pdev);
676         platform_device_unregister(pcf->adc_pdev);
677
678         for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
679                 platform_device_unregister(pcf->regulator_pdev[i]);
680
681         kfree(pcf);
682
683         return 0;
684 }
685
686 static struct i2c_device_id pcf50633_id_table[] = {
687         {"pcf50633", 0x73},
688 };
689
690 static struct i2c_driver pcf50633_driver = {
691         .driver = {
692                 .name   = "pcf50633",
693                 .suspend = pcf50633_suspend,
694                 .resume = pcf50633_resume,
695         },
696         .id_table = pcf50633_id_table,
697         .probe = pcf50633_probe,
698         .remove = __devexit_p(pcf50633_remove),
699 };
700
701 static int __init pcf50633_init(void)
702 {
703         return i2c_add_driver(&pcf50633_driver);
704 }
705
706 static void __exit pcf50633_exit(void)
707 {
708         i2c_del_driver(&pcf50633_driver);
709 }
710
711 MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
712 MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
713 MODULE_LICENSE("GPL");
714
715 module_init(pcf50633_init);
716 module_exit(pcf50633_exit);