summaryrefslogtreecommitdiff
path: root/drivers/mfd/pcf50633-core.c
blob: 8d3c38bf9714857fbe97507e52498a39cec122c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
/* NXP PCF50633 Power Management Unit (PMU) driver
 *
 * (C) 2006-2008 by Openmoko, Inc.
 * Author: Harald Welte <laforge@openmoko.org>
 * 	   Balaji Rao <balajirrao@openmoko.org>
 * All rights reserved.
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 *
 */

#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/sysfs.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/workqueue.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <linux/irq.h>

#include <linux/mfd/pcf50633/core.h>

/* Two MBCS registers used during cold start */
#define PCF50633_REG_MBCS1		0x4b
#define PCF50633_REG_MBCS2		0x4c
#define PCF50633_MBCS1_USBPRES 		0x01
#define PCF50633_MBCS1_ADAPTPRES	0x01

static int __pcf50633_read(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
{
	int ret;

	ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
				num, data);
	if (ret < 0)
		dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);

	return ret;
}

static int __pcf50633_write(struct pcf50633 *pcf, u8 reg, int num, u8 *data)
{
	int ret;

	ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
				num, data);
	if (ret < 0)
		dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);

	return ret;

}

/* Read a block of upto 32 regs  */
int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
					int nr_regs, u8 *data)
{
	int ret;

	mutex_lock(&pcf->lock);
	ret = __pcf50633_read(pcf, reg, nr_regs, data);
	mutex_unlock(&pcf->lock);

	return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_read_block);

/* Write a block of upto 32 regs  */
int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
					int nr_regs, u8 *data)
{
	int ret;

	mutex_lock(&pcf->lock);
	ret = __pcf50633_write(pcf, reg, nr_regs, data);
	mutex_unlock(&pcf->lock);

	return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_write_block);

u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
{
	u8 val;

	mutex_lock(&pcf->lock);
	__pcf50633_read(pcf, reg, 1, &val);
	mutex_unlock(&pcf->lock);

	return val;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_read);

int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
{
	int ret;

	mutex_lock(&pcf->lock);
	ret = __pcf50633_write(pcf, reg, 1, &val);
	mutex_unlock(&pcf->lock);

	return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_write);

int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
{
	int ret;
	u8 tmp;

	val &= mask;

	mutex_lock(&pcf->lock);
	ret = __pcf50633_read(pcf, reg, 1, &tmp);
	if (ret < 0)
		goto out;

	tmp &= ~mask;
	tmp |= val;
	ret = __pcf50633_write(pcf, reg, 1, &tmp);

out:
	mutex_unlock(&pcf->lock);

	return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);

int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
{
	int ret;
	u8 tmp;

	mutex_lock(&pcf->lock);
	ret = __pcf50633_read(pcf, reg, 1, &tmp);
	if (ret < 0)
		goto out;

	tmp &= ~val;
	ret = __pcf50633_write(pcf, reg, 1, &tmp);

out:
	mutex_unlock(&pcf->lock);

	return ret;
}
EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);

/* sysfs attributes */
static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
			    char *buf)
{
	struct pcf50633 *pcf = dev_get_drvdata(dev);
	u8 dump[16];
	int n, n1, idx = 0;
	char *buf1 = buf;
	static u8 address_no_read[] = { /* must be ascending */
		PCF50633_REG_INT1,
		PCF50633_REG_INT2,
		PCF50633_REG_INT3,
		PCF50633_REG_INT4,
		PCF50633_REG_INT5,
		0 /* terminator */
	};

	for (n = 0; n < 256; n += sizeof(dump)) {
		for (n1 = 0; n1 < sizeof(dump); n1++)
			if (n == address_no_read[idx]) {
				idx++;
				dump[n1] = 0x00;
			} else
				dump[n1] = pcf50633_reg_read(pcf, n + n1);

		hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
		buf1 += strlen(buf1);
		*buf1++ = '\n';
		*buf1 = '\0';
	}

	return buf1 - buf;
}
static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);

static ssize_t show_resume_reason(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct pcf50633 *pcf = dev_get_drvdata(dev);
	int n;

	n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
				pcf->resume_reason[0],
				pcf->resume_reason[1],
				pcf->resume_reason[2],
				pcf->resume_reason[3],
				pcf->resume_reason[4]);

	return n;
}
static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);

static struct attribute *pcf_sysfs_entries[] = {
	&dev_attr_dump_regs.attr,
	&dev_attr_resume_reason.attr,
	NULL,
};

static struct attribute_group pcf_attr_group = {
	.name	= NULL,			/* put in device directory */
	.attrs	= pcf_sysfs_entries,
};

int pcf50633_register_irq(struct pcf50633 *pcf, int irq,
			void (*handler) (int, void *), void *data)
{
	if (irq < 0 || irq > PCF50633_NUM_IRQ || !handler)
		return -EINVAL;

	if (WARN_ON(pcf->irq_handler[irq].handler))
		return -EBUSY;

	mutex_lock(&pcf->lock);
	pcf->irq_handler[irq].handler = handler;
	pcf->irq_handler[irq].data = data;
	mutex_unlock(&pcf->lock);

	return 0;
}
EXPORT_SYMBOL_GPL(pcf50633_register_irq);

int pcf50633_free_irq(struct pcf50633 *pcf, int irq)
{
	if (irq < 0 || irq > PCF50633_NUM_IRQ)
		return -EINVAL;

	mutex_lock(&pcf->lock);
	pcf->irq_handler[irq].handler = NULL;
	mutex_unlock(&pcf->lock);

	return 0;
}
EXPORT_SYMBOL_GPL(pcf50633_free_irq);

static int __pcf50633_irq_mask_set(struct pcf50633 *pcf, int irq, u8 mask)
{
	u8 reg, bits, tmp;
	int ret = 0, idx;

	idx = irq >> 3;
	reg =  PCF50633_REG_INT1M + idx;
	bits = 1 << (irq & 0x07);

	mutex_lock(&pcf->lock);

	if (mask) {
		ret = __pcf50633_read(pcf, reg, 1, &tmp);
		if (ret < 0)
			goto out;

		tmp |= bits;

		ret = __pcf50633_write(pcf, reg, 1, &tmp);
		if (ret < 0)
			goto out;

		pcf->mask_regs[idx] &= ~bits;
		pcf->mask_regs[idx] |= bits;
	} else {
		ret = __pcf50633_read(pcf, reg, 1, &tmp);
		if (ret < 0)
			goto out;

		tmp &= ~bits;

		ret = __pcf50633_write(pcf, reg, 1, &tmp);
		if (ret < 0)
			goto out;

		pcf->mask_regs[idx] &= ~bits;
	}
out:
	mutex_unlock(&pcf->lock);

	return ret;
}

int pcf50633_irq_mask(struct pcf50633 *pcf, int irq)
{
	dev_info(pcf->dev, "Masking IRQ %d\n", irq);

	return __pcf50633_irq_mask_set(pcf, irq, 1);
}
EXPORT_SYMBOL_GPL(pcf50633_irq_mask);

int pcf50633_irq_unmask(struct pcf50633 *pcf, int irq)
{
	dev_info(pcf->dev, "Unmasking IRQ %d\n", irq);

	return __pcf50633_irq_mask_set(pcf, irq, 0);
}
EXPORT_SYMBOL_GPL(pcf50633_irq_unmask);

int pcf50633_irq_mask_get(struct pcf50633 *pcf, int irq)
{
	u8 reg, bits;

	reg =  irq >> 3;
	bits = 1 << (irq & 0x07);

	return pcf->mask_regs[reg] & bits;
}
EXPORT_SYMBOL_GPL(pcf50633_irq_mask_get);

static void pcf50633_irq_call_handler(struct pcf50633 *pcf, int irq)
{
	if (pcf->irq_handler[irq].handler)
		pcf->irq_handler[irq].handler(irq, pcf->irq_handler[irq].data);
}

/* Maximum amount of time ONKEY is held before emergency action is taken */
#define PCF50633_ONKEY1S_TIMEOUT 8

static void pcf50633_irq_worker(struct work_struct *work)
{
	struct pcf50633 *pcf;
	int ret, i, j;
	u8 pcf_int[5], chgstat;

	pcf = container_of(work, struct pcf50633, irq_work);

	/* Read the 5 INT regs in one transaction */
	ret = pcf50633_read_block(pcf, PCF50633_REG_INT1,
						ARRAY_SIZE(pcf_int), pcf_int);
	if (ret != ARRAY_SIZE(pcf_int)) {
		dev_err(pcf->dev, "Error reading INT registers\n");

		/*
		 * If this doesn't ACK the interrupt to the chip, we'll be
		 * called once again as we're level triggered.
		 */
		goto out;
	}

	/* We immediately read the usb and adapter status. We thus make sure
	 * only of USBINS/USBREM IRQ handlers are called */
	if (pcf_int[0] & (PCF50633_INT1_USBINS | PCF50633_INT1_USBREM)) {
		chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
		if (chgstat & (0x3 << 4))
			pcf_int[0] &= ~(1 << PCF50633_INT1_USBREM);
		else
			pcf_int[0] &= ~(1 << PCF50633_INT1_USBINS);
	}

	/* Make sure only one of ADPINS or ADPREM is set */
	if (pcf_int[0] & (PCF50633_INT1_ADPINS | PCF50633_INT1_ADPREM)) {
		chgstat = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
		if (chgstat & (0x3 << 4))
			pcf_int[0] &= ~(1 << PCF50633_INT1_ADPREM);
		else
			pcf_int[0] &= ~(1 << PCF50633_INT1_ADPINS);
	}

	dev_dbg(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x "
			"INT4=0x%02x INT5=0x%02x\n", pcf_int[0],
			pcf_int[1], pcf_int[2], pcf_int[3], pcf_int[4]);

	/* Some revisions of the chip don't have a 8s standby mode on
	 * ONKEY1S press. We try to manually do it in such cases. */
	if ((pcf_int[0] & PCF50633_INT1_SECOND) && pcf->onkey1s_held) {
		dev_info(pcf->dev, "ONKEY1S held for %d secs\n",
							pcf->onkey1s_held);
		if (pcf->onkey1s_held++ == PCF50633_ONKEY1S_TIMEOUT)
			if (pcf->pdata->force_shutdown)
				pcf->pdata->force_shutdown(pcf);
	}

	if (pcf_int[2] & PCF50633_INT3_ONKEY1S) {
		dev_info(pcf->dev, "ONKEY1S held\n");
		pcf->onkey1s_held = 1 ;

		/* Unmask IRQ_SECOND */
		pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT1M,
						PCF50633_INT1_SECOND);

		/* Unmask IRQ_ONKEYR */
		pcf50633_reg_clear_bits(pcf, PCF50633_REG_INT2M,
						PCF50633_INT2_ONKEYR);
	}

	if ((pcf_int[1] & PCF50633_INT2_ONKEYR) && pcf->onkey1s_held) {
		pcf->onkey1s_held = 0;

		/* Mask SECOND and ONKEYR interrupts */
		if (pcf->mask_regs[0] & PCF50633_INT1_SECOND)
			pcf50633_reg_set_bit_mask(pcf,
					PCF50633_REG_INT1M,
					PCF50633_INT1_SECOND,
					PCF50633_INT1_SECOND);

		if (pcf->mask_regs[1] & PCF50633_INT2_ONKEYR)
			pcf50633_reg_set_bit_mask(pcf,
					PCF50633_REG_INT2M,
					PCF50633_INT2_ONKEYR,
					PCF50633_INT2_ONKEYR);
	}

	/* Have we just resumed ? */
	if (pcf->is_suspended) {
		pcf->is_suspended = 0;

		/* Set the resume reason filtering out non resumers */
		for (i = 0; i < ARRAY_SIZE(pcf_int); i++)
			pcf->resume_reason[i] = pcf_int[i] &
						pcf->pdata->resumers[i];

		/* Make sure we don't pass on any ONKEY events to
		 * userspace now */
		pcf_int[1] &= ~(PCF50633_INT2_ONKEYR | PCF50633_INT2_ONKEYF);
	}

	for (i = 0; i < ARRAY_SIZE(pcf_int); i++) {
		/* Unset masked interrupts */
		pcf_int[i] &= ~pcf->mask_regs[i];

		for (j = 0; j < 8 ; j++)
			if (pcf_int[i] & (1 << j))
				pcf50633_irq_call_handler(pcf, (i * 8) + j);
	}

out:
	put_device(pcf->dev);
	enable_irq(pcf->irq);
}

static irqreturn_t pcf50633_irq(int irq, void *data)
{
	struct pcf50633 *pcf = data;

	dev_dbg(pcf->dev, "pcf50633_irq\n");

	get_device(pcf->dev);
	disable_irq_nosync(pcf->irq);
	schedule_work(&pcf->irq_work);

	return IRQ_HANDLED;
}

static void
pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
						struct platform_device **pdev)
{
	struct pcf50633_subdev_pdata *subdev_pdata;
	int ret;

	*pdev = platform_device_alloc(name, -1);
	if (!*pdev) {
		dev_err(pcf->dev, "Falied to allocate %s\n", name);
		return;
	}

	subdev_pdata = kmalloc(sizeof(*subdev_pdata), GFP_KERNEL);
	if (!subdev_pdata) {
		dev_err(pcf->dev, "Error allocating subdev pdata\n");
		platform_device_put(*pdev);
	}

	subdev_pdata->pcf = pcf;
	platform_device_add_data(*pdev, subdev_pdata, sizeof(*subdev_pdata));

	(*pdev)->dev.parent = pcf->dev;

	ret = platform_device_add(*pdev);
	if (ret) {
		dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
		platform_device_put(*pdev);
		*pdev = NULL;
	}
}

#ifdef CONFIG_PM
static int pcf50633_suspend(struct device *dev, pm_message_t state)
{
	struct pcf50633 *pcf;
	int ret = 0, i;
	u8 res[5];

	pcf = dev_get_drvdata(dev);

	/* Make sure our interrupt handlers are not called
	 * henceforth */
	disable_irq(pcf->irq);

	/* Make sure that any running IRQ worker has quit */
	cancel_work_sync(&pcf->irq_work);

	/* Save the masks */
	ret = pcf50633_read_block(pcf, PCF50633_REG_INT1M,
				ARRAY_SIZE(pcf->suspend_irq_masks),
					pcf->suspend_irq_masks);
	if (ret < 0) {
		dev_err(pcf->dev, "error saving irq masks\n");
		goto out;
	}

	/* Write wakeup irq masks */
	for (i = 0; i < ARRAY_SIZE(res); i++)
		res[i] = ~pcf->pdata->resumers[i];

	ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
					ARRAY_SIZE(res), &res[0]);
	if (ret < 0) {
		dev_err(pcf->dev, "error writing wakeup irq masks\n");
		goto out;
	}

	pcf->is_suspended = 1;

out:
	return ret;
}

static int pcf50633_resume(struct device *dev)
{
	struct pcf50633 *pcf;
	int ret;

	pcf = dev_get_drvdata(dev);

	/* Write the saved mask registers */
	ret = pcf50633_write_block(pcf, PCF50633_REG_INT1M,
				ARRAY_SIZE(pcf->suspend_irq_masks),
					pcf->suspend_irq_masks);
	if (ret < 0)
		dev_err(pcf->dev, "Error restoring saved suspend masks\n");

	/* Restore regulators' state */


	get_device(pcf->dev);

	/*
	 * Clear any pending interrupts and set resume reason if any.
	 * This will leave with enable_irq()
	 */
	pcf50633_irq_worker(&pcf->irq_work);

	return 0;
}
#else
#define pcf50633_suspend NULL
#define pcf50633_resume NULL
#endif

static int __devinit pcf50633_probe(struct i2c_client *client,
				const struct i2c_device_id *ids)
{
	struct pcf50633 *pcf;
	struct pcf50633_platform_data *pdata = client->dev.platform_data;
	int i, ret = 0;
	int version, variant;

	pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
	if (!pcf)
		return -ENOMEM;

	pcf->pdata = pdata;

	mutex_init(&pcf->lock);

	i2c_set_clientdata(client, pcf);
	pcf->dev = &client->dev;
	pcf->i2c_client = client;
	pcf->irq = client->irq;

	INIT_WORK(&pcf->irq_work, pcf50633_irq_worker);

	version = pcf50633_reg_read(pcf, 0);
	variant = pcf50633_reg_read(pcf, 1);
	if (version < 0 || variant < 0) {
		dev_err(pcf->dev, "Unable to probe pcf50633\n");
		ret = -ENODEV;
		goto err;
	}

	dev_info(pcf->dev, "Probed device version %d variant %d\n",
							version, variant);

	/* Enable all interrupts except RTC SECOND */
	pcf->mask_regs[0] = 0x80;
	pcf50633_reg_write(pcf, PCF50633_REG_INT1M, pcf->mask_regs[0]);
	pcf50633_reg_write(pcf, PCF50633_REG_INT2M, 0x00);
	pcf50633_reg_write(pcf, PCF50633_REG_INT3M, 0x00);
	pcf50633_reg_write(pcf, PCF50633_REG_INT4M, 0x00);
	pcf50633_reg_write(pcf, PCF50633_REG_INT5M, 0x00);

	/* Create sub devices */
	pcf50633_client_dev_register(pcf, "pcf50633-input",
						&pcf->input_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-rtc",
						&pcf->rtc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-mbc",
						&pcf->mbc_pdev);
	pcf50633_client_dev_register(pcf, "pcf50633-adc",
						&pcf->adc_pdev);

	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
		struct platform_device *pdev;

		pdev = platform_device_alloc("pcf50633-regltr", i);
		if (!pdev) {
			dev_err(pcf->dev, "Cannot create regulator\n");
			continue;
		}

		pdev->dev.parent = pcf->dev;
		pdev->dev.platform_data = &pdata->reg_init_data[i];
		dev_set_drvdata(&pdev->dev, pcf);
		pcf->regulator_pdev[i] = pdev;

		platform_device_add(pdev);
	}

	if (client->irq) {
		ret = request_irq(client->irq, pcf50633_irq,
				IRQF_TRIGGER_LOW, "pcf50633", pcf);

		if (ret) {
			dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
			goto err;
		}
	} else {
		dev_err(pcf->dev, "No IRQ configured\n");
		goto err;
	}

	if (enable_irq_wake(client->irq) < 0)
		dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source"
			"in this hardware revision", client->irq);

	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
	if (ret)
		dev_err(pcf->dev, "error creating sysfs entries\n");

	if (pdata->probe_done)
		pdata->probe_done(pcf);

	return 0;

err:
	kfree(pcf);
	return ret;
}

static int __devexit pcf50633_remove(struct i2c_client *client)
{
	struct pcf50633 *pcf = i2c_get_clientdata(client);
	int i;

	free_irq(pcf->irq, pcf);

	platform_device_unregister(pcf->input_pdev);
	platform_device_unregister(pcf->rtc_pdev);
	platform_device_unregister(pcf->mbc_pdev);
	platform_device_unregister(pcf->adc_pdev);

	for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
		platform_device_unregister(pcf->regulator_pdev[i]);

	kfree(pcf);

	return 0;
}

static struct i2c_device_id pcf50633_id_table[] = {
	{"pcf50633", 0x73},
	{/* end of list */}
};

static struct i2c_driver pcf50633_driver = {
	.driver = {
		.name	= "pcf50633",
		.suspend = pcf50633_suspend,
		.resume	= pcf50633_resume,
	},
	.id_table = pcf50633_id_table,
	.probe = pcf50633_probe,
	.remove = __devexit_p(pcf50633_remove),
};

static int __init pcf50633_init(void)
{
	return i2c_add_driver(&pcf50633_driver);
}

static void __exit pcf50633_exit(void)
{
	i2c_del_driver(&pcf50633_driver);
}

MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
MODULE_LICENSE("GPL");

subsys_initcall(pcf50633_init);
module_exit(pcf50633_exit);