summaryrefslogtreecommitdiffstats
path: root/drivers/mfd/tps65010.c
blob: 743fb524fc8ae96f58cfaa6ea635317b621878cb (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
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
/*
 * tps65010 - driver for tps6501x power management chips
 *
 * Copyright (C) 2004 Texas Instruments
 * Copyright (C) 2004-2005 David Brownell
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/mutex.h>
#include <linux/platform_device.h>

#include <linux/i2c/tps65010.h>

#include <linux/gpio.h>


/*-------------------------------------------------------------------------*/

#define	DRIVER_VERSION	"2 May 2005"
#define	DRIVER_NAME	(tps65010_driver.driver.name)

MODULE_DESCRIPTION("TPS6501x Power Management Driver");
MODULE_LICENSE("GPL");

static struct i2c_driver tps65010_driver;

/*-------------------------------------------------------------------------*/

/* This driver handles a family of multipurpose chips, which incorporate
 * voltage regulators, lithium ion/polymer battery charging, GPIOs, LEDs,
 * and other features often needed in portable devices like cell phones
 * or digital cameras.
 *
 * The tps65011 and tps65013 have different voltage settings compared
 * to tps65010 and tps65012.  The tps65013 has a NO_CHG status/irq.
 * All except tps65010 have "wait" mode, possibly defaulted so that
 * battery-insert != device-on.
 *
 * We could distinguish between some models by checking VDCDC1.UVLO or
 * other registers, unless they've been changed already after powerup
 * as part of board setup by a bootloader.
 */
enum tps_model {
	TPS65010,
	TPS65011,
	TPS65012,
	TPS65013,
};

struct tps65010 {
	struct i2c_client	*client;
	struct mutex		lock;
	struct delayed_work	work;
	struct dentry		*file;
	unsigned		charging:1;
	unsigned		por:1;
	unsigned		model:8;
	u16			vbus;
	unsigned long		flags;
#define	FLAG_VBUS_CHANGED	0
#define	FLAG_IRQ_ENABLE		1

	/* copies of last register state */
	u8			chgstatus, regstatus, chgconf;
	u8			nmask1, nmask2;

	u8			outmask;
	struct gpio_chip	chip;
	struct platform_device	*leds;
};

#define	POWER_POLL_DELAY	msecs_to_jiffies(5000)

/*-------------------------------------------------------------------------*/

#if	defined(DEBUG) || defined(CONFIG_DEBUG_FS)

static void dbg_chgstat(char *buf, size_t len, u8 chgstatus)
{
	snprintf(buf, len, "%02x%s%s%s%s%s%s%s%s\n",
		chgstatus,
		(chgstatus & TPS_CHG_USB) ? " USB" : "",
		(chgstatus & TPS_CHG_AC) ? " AC" : "",
		(chgstatus & TPS_CHG_THERM) ? " therm" : "",
		(chgstatus & TPS_CHG_TERM) ? " done" :
			((chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
				? " (charging)" : ""),
		(chgstatus & TPS_CHG_TAPER_TMO) ? " taper_tmo" : "",
		(chgstatus & TPS_CHG_CHG_TMO) ? " charge_tmo" : "",
		(chgstatus & TPS_CHG_PRECHG_TMO) ? " prechg_tmo" : "",
		(chgstatus & TPS_CHG_TEMP_ERR) ? " temp_err" : "");
}

static void dbg_regstat(char *buf, size_t len, u8 regstatus)
{
	snprintf(buf, len, "%02x %s%s%s%s%s%s%s%s\n",
		regstatus,
		(regstatus & TPS_REG_ONOFF) ? "off" : "(on)",
		(regstatus & TPS_REG_COVER) ? " uncover" : "",
		(regstatus & TPS_REG_UVLO) ? " UVLO" : "",
		(regstatus & TPS_REG_NO_CHG) ? " NO_CHG" : "",
		(regstatus & TPS_REG_PG_LD02) ? " ld02_bad" : "",
		(regstatus & TPS_REG_PG_LD01) ? " ld01_bad" : "",
		(regstatus & TPS_REG_PG_MAIN) ? " main_bad" : "",
		(regstatus & TPS_REG_PG_CORE) ? " core_bad" : "");
}

static void dbg_chgconf(int por, char *buf, size_t len, u8 chgconfig)
{
	const char *hibit;

	if (por)
		hibit = (chgconfig & TPS_CHARGE_POR)
				? "POR=69ms" : "POR=1sec";
	else
		hibit = (chgconfig & TPS65013_AUA) ? "AUA" : "";

	snprintf(buf, len, "%02x %s%s%s AC=%d%% USB=%dmA %sCharge\n",
		chgconfig, hibit,
		(chgconfig & TPS_CHARGE_RESET) ? " reset" : "",
		(chgconfig & TPS_CHARGE_FAST) ? " fast" : "",
		({int p; switch ((chgconfig >> 3) & 3) {
		case 3:		p = 100; break;
		case 2:		p = 75; break;
		case 1:		p = 50; break;
		default:	p = 25; break;
		}; p; }),
		(chgconfig & TPS_VBUS_CHARGING)
			? ((chgconfig & TPS_VBUS_500MA) ? 500 : 100)
			: 0,
		(chgconfig & TPS_CHARGE_ENABLE) ? "" : "No");
}

#endif

#ifdef	DEBUG

static void show_chgstatus(const char *label, u8 chgstatus)
{
	char buf [100];

	dbg_chgstat(buf, sizeof buf, chgstatus);
	pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
}

static void show_regstatus(const char *label, u8 regstatus)
{
	char buf [100];

	dbg_regstat(buf, sizeof buf, regstatus);
	pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
}

static void show_chgconfig(int por, const char *label, u8 chgconfig)
{
	char buf [100];

	dbg_chgconf(por, buf, sizeof buf, chgconfig);
	pr_debug("%s: %s %s", DRIVER_NAME, label, buf);
}

#else

static inline void show_chgstatus(const char *label, u8 chgstatus) { }
static inline void show_regstatus(const char *label, u8 chgstatus) { }
static inline void show_chgconfig(int por, const char *label, u8 chgconfig) { }

#endif

#ifdef	CONFIG_DEBUG_FS

static int dbg_show(struct seq_file *s, void *_)
{
	struct tps65010	*tps = s->private;
	u8		value, v2;
	unsigned	i;
	char		buf[100];
	const char	*chip;

	switch (tps->model) {
	case TPS65010:	chip = "tps65010"; break;
	case TPS65011:	chip = "tps65011"; break;
	case TPS65012:	chip = "tps65012"; break;
	case TPS65013:	chip = "tps65013"; break;
	default:	chip = NULL; break;
	}
	seq_printf(s, "driver  %s\nversion %s\nchip    %s\n\n",
			DRIVER_NAME, DRIVER_VERSION, chip);

	mutex_lock(&tps->lock);

	/* FIXME how can we tell whether a battery is present?
	 * likely involves a charge gauging chip (like BQ26501).
	 */

	seq_printf(s, "%scharging\n\n", tps->charging ? "" : "(not) ");


	/* registers for monitoring battery charging and status; note
	 * that reading chgstat and regstat may ack IRQs...
	 */
	value = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
	dbg_chgconf(tps->por, buf, sizeof buf, value);
	seq_printf(s, "chgconfig %s", buf);

	value = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
	dbg_chgstat(buf, sizeof buf, value);
	seq_printf(s, "chgstat   %s", buf);
	value = i2c_smbus_read_byte_data(tps->client, TPS_MASK1);
	dbg_chgstat(buf, sizeof buf, value);
	seq_printf(s, "mask1     %s", buf);
	/* ignore ackint1 */

	value = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
	dbg_regstat(buf, sizeof buf, value);
	seq_printf(s, "regstat   %s", buf);
	value = i2c_smbus_read_byte_data(tps->client, TPS_MASK2);
	dbg_regstat(buf, sizeof buf, value);
	seq_printf(s, "mask2     %s\n", buf);
	/* ignore ackint2 */

	queue_delayed_work(system_power_efficient_wq, &tps->work,
			   POWER_POLL_DELAY);

	/* VMAIN voltage, enable lowpower, etc */
	value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC1);
	seq_printf(s, "vdcdc1    %02x\n", value);

	/* VCORE voltage, vibrator on/off */
	value = i2c_smbus_read_byte_data(tps->client, TPS_VDCDC2);
	seq_printf(s, "vdcdc2    %02x\n", value);

	/* both LD0s, and their lowpower behavior */
	value = i2c_smbus_read_byte_data(tps->client, TPS_VREGS1);
	seq_printf(s, "vregs1    %02x\n\n", value);


	/* LEDs and GPIOs */
	value = i2c_smbus_read_byte_data(tps->client, TPS_LED1_ON);
	v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED1_PER);
	seq_printf(s, "led1 %s, on=%02x, per=%02x, %d/%d msec\n",
		(value & 0x80)
			? ((v2 & 0x80) ? "on" : "off")
			: ((v2 & 0x80) ? "blink" : "(nPG)"),
		value, v2,
		(value & 0x7f) * 10, (v2 & 0x7f) * 100);

	value = i2c_smbus_read_byte_data(tps->client, TPS_LED2_ON);
	v2 = i2c_smbus_read_byte_data(tps->client, TPS_LED2_PER);
	seq_printf(s, "led2 %s, on=%02x, per=%02x, %d/%d msec\n",
		(value & 0x80)
			? ((v2 & 0x80) ? "on" : "off")
			: ((v2 & 0x80) ? "blink" : "off"),
		value, v2,
		(value & 0x7f) * 10, (v2 & 0x7f) * 100);

	value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
	v2 = i2c_smbus_read_byte_data(tps->client, TPS_MASK3);
	seq_printf(s, "defgpio %02x mask3 %02x\n", value, v2);

	for (i = 0; i < 4; i++) {
		if (value & (1 << (4 + i)))
			seq_printf(s, "  gpio%d-out %s\n", i + 1,
				(value & (1 << i)) ? "low" : "hi ");
		else
			seq_printf(s, "  gpio%d-in  %s %s %s\n", i + 1,
				(value & (1 << i)) ? "hi " : "low",
				(v2 & (1 << i)) ? "no-irq" : "irq",
				(v2 & (1 << (4 + i))) ? "rising" : "falling");
	}

	mutex_unlock(&tps->lock);
	return 0;
}

static int dbg_tps_open(struct inode *inode, struct file *file)
{
	return single_open(file, dbg_show, inode->i_private);
}

static const struct file_operations debug_fops = {
	.open		= dbg_tps_open,
	.read		= seq_read,
	.llseek		= seq_lseek,
	.release	= single_release,
};

#define	DEBUG_FOPS	&debug_fops

#else
#define	DEBUG_FOPS	NULL
#endif

/*-------------------------------------------------------------------------*/

/* handle IRQS in a task context, so we can use I2C calls */
static void tps65010_interrupt(struct tps65010 *tps)
{
	u8 tmp = 0, mask, poll;

	/* IRQs won't trigger for certain events, but we can get
	 * others by polling (normally, with external power applied).
	 */
	poll = 0;

	/* regstatus irqs */
	if (tps->nmask2) {
		tmp = i2c_smbus_read_byte_data(tps->client, TPS_REGSTATUS);
		mask = tmp ^ tps->regstatus;
		tps->regstatus = tmp;
		mask &= tps->nmask2;
	} else
		mask = 0;
	if (mask) {
		tps->regstatus =  tmp;
		/* may need to shut something down ... */

		/* "off" usually means deep sleep */
		if (tmp & TPS_REG_ONOFF) {
			pr_info("%s: power off button\n", DRIVER_NAME);
#if 0
			/* REVISIT:  this might need its own workqueue
			 * plus tweaks including deadlock avoidance ...
			 * also needs to get error handling and probably
			 * an #ifdef CONFIG_HIBERNATION
			 */
			hibernate();
#endif
			poll = 1;
		}
	}

	/* chgstatus irqs */
	if (tps->nmask1) {
		tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGSTATUS);
		mask = tmp ^ tps->chgstatus;
		tps->chgstatus = tmp;
		mask &= tps->nmask1;
	} else
		mask = 0;
	if (mask) {
		unsigned	charging = 0;

		show_chgstatus("chg/irq", tmp);
		if (tmp & (TPS_CHG_USB|TPS_CHG_AC))
			show_chgconfig(tps->por, "conf", tps->chgconf);

		/* Unless it was turned off or disabled, we charge any
		 * battery whenever there's power available for it
		 * and the charger hasn't been disabled.
		 */
		if (!(tps->chgstatus & ~(TPS_CHG_USB|TPS_CHG_AC))
				&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
				&& (tps->chgconf & TPS_CHARGE_ENABLE)
				) {
			if (tps->chgstatus & TPS_CHG_USB) {
				/* VBUS options are readonly until reconnect */
				if (mask & TPS_CHG_USB)
					set_bit(FLAG_VBUS_CHANGED, &tps->flags);
				charging = 1;
			} else if (tps->chgstatus & TPS_CHG_AC)
				charging = 1;
		}
		if (charging != tps->charging) {
			tps->charging = charging;
			pr_info("%s: battery %scharging\n",
				DRIVER_NAME, charging ? "" :
				((tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC))
					? "NOT " : "dis"));
		}
	}

	/* always poll to detect (a) power removal, without tps65013
	 * NO_CHG IRQ; or (b) restart of charging after stop.
	 */
	if ((tps->model != TPS65013 || !tps->charging)
			&& (tps->chgstatus & (TPS_CHG_USB|TPS_CHG_AC)))
		poll = 1;
	if (poll)
		queue_delayed_work(system_power_efficient_wq, &tps->work,
				   POWER_POLL_DELAY);

	/* also potentially gpio-in rise or fall */
}

/* handle IRQs and polling using keventd for now */
static void tps65010_work(struct work_struct *work)
{
	struct tps65010		*tps;

	tps = container_of(to_delayed_work(work), struct tps65010, work);
	mutex_lock(&tps->lock);

	tps65010_interrupt(tps);

	if (test_and_clear_bit(FLAG_VBUS_CHANGED, &tps->flags)) {
		int	status;
		u8	chgconfig, tmp;

		chgconfig = i2c_smbus_read_byte_data(tps->client,
					TPS_CHGCONFIG);
		chgconfig &= ~(TPS_VBUS_500MA | TPS_VBUS_CHARGING);
		if (tps->vbus == 500)
			chgconfig |= TPS_VBUS_500MA | TPS_VBUS_CHARGING;
		else if (tps->vbus >= 100)
			chgconfig |= TPS_VBUS_CHARGING;

		status = i2c_smbus_write_byte_data(tps->client,
				TPS_CHGCONFIG, chgconfig);

		/* vbus update fails unless VBUS is connected! */
		tmp = i2c_smbus_read_byte_data(tps->client, TPS_CHGCONFIG);
		tps->chgconf = tmp;
		show_chgconfig(tps->por, "update vbus", tmp);
	}

	if (test_and_clear_bit(FLAG_IRQ_ENABLE, &tps->flags))
		enable_irq(tps->client->irq);

	mutex_unlock(&tps->lock);
}

static irqreturn_t tps65010_irq(int irq, void *_tps)
{
	struct tps65010		*tps = _tps;

	disable_irq_nosync(irq);
	set_bit(FLAG_IRQ_ENABLE, &tps->flags);
	queue_delayed_work(system_power_efficient_wq, &tps->work, 0);
	return IRQ_HANDLED;
}

/*-------------------------------------------------------------------------*/

/* offsets 0..3 == GPIO1..GPIO4
 * offsets 4..5 == LED1/nPG, LED2 (we set one of the non-BLINK modes)
 * offset 6 == vibrator motor driver
 */
static void
tps65010_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
{
	if (offset < 4)
		tps65010_set_gpio_out_value(offset + 1, value);
	else if (offset < 6)
		tps65010_set_led(offset - 3, value ? ON : OFF);
	else
		tps65010_set_vib(value);
}

static int
tps65010_output(struct gpio_chip *chip, unsigned offset, int value)
{
	/* GPIOs may be input-only */
	if (offset < 4) {
		struct tps65010		*tps;

		tps = container_of(chip, struct tps65010, chip);
		if (!(tps->outmask & (1 << offset)))
			return -EINVAL;
		tps65010_set_gpio_out_value(offset + 1, value);
	} else if (offset < 6)
		tps65010_set_led(offset - 3, value ? ON : OFF);
	else
		tps65010_set_vib(value);

	return 0;
}

static int tps65010_gpio_get(struct gpio_chip *chip, unsigned offset)
{
	int			value;
	struct tps65010		*tps;

	tps = container_of(chip, struct tps65010, chip);

	if (offset < 4) {
		value = i2c_smbus_read_byte_data(tps->client, TPS_DEFGPIO);
		if (value < 0)
			return 0;
		if (value & (1 << (offset + 4)))	/* output */
			return !(value & (1 << offset));
		else					/* input */
			return (value & (1 << offset));
	}

	/* REVISIT we *could* report LED1/nPG and LED2 state ... */
	return 0;
}


/*-------------------------------------------------------------------------*/

static struct tps65010 *the_tps;

static int __exit tps65010_remove(struct i2c_client *client)
{
	struct tps65010		*tps = i2c_get_clientdata(client);
	struct tps65010_board	*board = dev_get_platdata(&client->dev);

	if (board && board->teardown) {
		int status = board->teardown(client, board->context);
		if (status < 0)
			dev_dbg(&client->dev, "board %s %s err %d\n",
				"teardown", client->name, status);
	}
	if (client->irq > 0)
		free_irq(client->irq, tps);
	cancel_delayed_work_sync(&tps->work);
	debugfs_remove(tps->file);
	the_tps = NULL;
	return 0;
}

static int tps65010_probe(struct i2c_client *client,
			  const struct i2c_device_id *id)
{
	struct tps65010		*tps;
	int			status;
	struct tps65010_board	*board = dev_get_platdata(&client->dev);

	if (the_tps) {
		dev_dbg(&client->dev, "only one tps6501x chip allowed\n");
		return -ENODEV;
	}

	if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
		return -EINVAL;

	tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
	if (!tps)
		return -ENOMEM;

	mutex_init(&tps->lock);
	INIT_DELAYED_WORK(&tps->work, tps65010_work);
	tps->client = client;
	tps->model = id->driver_data;

	/* the IRQ is active low, but many gpio lines can't support that
	 * so this driver uses falling-edge triggers instead.
	 */
	if (client->irq > 0) {
		status = request_irq(client->irq, tps65010_irq,
				     IRQF_TRIGGER_FALLING, DRIVER_NAME, tps);
		if (status < 0) {
			dev_dbg(&client->dev, "can't get IRQ %d, err %d\n",
					client->irq, status);
			return status;
		}
		/* annoying race here, ideally we'd have an option
		 * to claim the irq now and enable it later.
		 * FIXME genirq IRQF_NOAUTOEN now solves that ...
		 */
		disable_irq(client->irq);
		set_bit(FLAG_IRQ_ENABLE, &tps->flags);
	} else
		dev_warn(&client->dev, "IRQ not configured!\n");


	switch (tps->model) {
	case TPS65010:
	case TPS65012:
		tps->por = 1;
		break;
	/* else CHGCONFIG.POR is replaced by AUA, enabling a WAIT mode */
	}
	tps->chgconf = i2c_smbus_read_byte_data(client, TPS_CHGCONFIG);
	show_chgconfig(tps->por, "conf/init", tps->chgconf);

	show_chgstatus("chg/init",
		i2c_smbus_read_byte_data(client, TPS_CHGSTATUS));
	show_regstatus("reg/init",
		i2c_smbus_read_byte_data(client, TPS_REGSTATUS));

	pr_debug("%s: vdcdc1 0x%02x, vdcdc2 %02x, vregs1 %02x\n", DRIVER_NAME,
		i2c_smbus_read_byte_data(client, TPS_VDCDC1),
		i2c_smbus_read_byte_data(client, TPS_VDCDC2),
		i2c_smbus_read_byte_data(client, TPS_VREGS1));
	pr_debug("%s: defgpio 0x%02x, mask3 0x%02x\n", DRIVER_NAME,
		i2c_smbus_read_byte_data(client, TPS_DEFGPIO),
		i2c_smbus_read_byte_data(client, TPS_MASK3));

	i2c_set_clientdata(client, tps);
	the_tps = tps;

#if	defined(CONFIG_USB_GADGET) && !defined(CONFIG_USB_OTG)
	/* USB hosts can't draw VBUS.  OTG devices could, later
	 * when OTG infrastructure enables it.  USB peripherals
	 * could be relying on VBUS while booting, though.
	 */
	tps->vbus = 100;
#endif

	/* unmask the "interesting" irqs, then poll once to
	 * kickstart monitoring, initialize shadowed status
	 * registers, and maybe disable VBUS draw.
	 */
	tps->nmask1 = ~0;
	(void) i2c_smbus_write_byte_data(client, TPS_MASK1, ~tps->nmask1);

	tps->nmask2 = TPS_REG_ONOFF;
	if (tps->model == TPS65013)
		tps->nmask2 |= TPS_REG_NO_CHG;
	(void) i2c_smbus_write_byte_data(client, TPS_MASK2, ~tps->nmask2);

	(void) i2c_smbus_write_byte_data(client, TPS_MASK3, 0x0f
		| i2c_smbus_read_byte_data(client, TPS_MASK3));

	tps65010_work(&tps->work.work);

	tps->file = debugfs_create_file(DRIVER_NAME, S_IRUGO, NULL,
				tps, DEBUG_FOPS);

	/* optionally register GPIOs */
	if (board && board->base != 0) {
		tps->outmask = board->outmask;

		tps->chip.label = client->name;
		tps->chip.dev = &client->dev;
		tps->chip.owner = THIS_MODULE;

		tps->chip.set = tps65010_gpio_set;
		tps->chip.direction_output = tps65010_output;

		/* NOTE:  only partial support for inputs; nyet IRQs */
		tps->chip.get = tps65010_gpio_get;

		tps->chip.base = board->base;
		tps->chip.ngpio = 7;
		tps->chip.can_sleep = 1;

		status = gpiochip_add(&tps->chip);
		if (status < 0)
			dev_err(&client->dev, "can't add gpiochip, err %d\n",
					status);
		else if (board->setup) {
			status = board->setup(client, board->context);
			if (status < 0) {
				dev_dbg(&client->dev,
					"board %s %s err %d\n",
					"setup", client->name, status);
				status = 0;
			}
		}
	}

	return 0;
}

static const struct i2c_device_id tps65010_id[] = {
	{ "tps65010", TPS65010 },
	{ "tps65011", TPS65011 },
	{ "tps65012", TPS65012 },
	{ "tps65013", TPS65013 },
	{ "tps65014", TPS65011 },	/* tps65011 charging at 6.5V max */
	{ }
};
MODULE_DEVICE_TABLE(i2c, tps65010_id);

static struct i2c_driver tps65010_driver = {
	.driver = {
		.name	= "tps65010",
	},
	.probe	= tps65010_probe,
	.remove	= __exit_p(tps65010_remove),
	.id_table = tps65010_id,
};

/*-------------------------------------------------------------------------*/

/* Draw from VBUS:
 *   0 mA -- DON'T DRAW (might supply power instead)
 * 100 mA -- usb unit load (slowest charge rate)
 * 500 mA -- usb high power (fast battery charge)
 */
int tps65010_set_vbus_draw(unsigned mA)
{
	unsigned long	flags;

	if (!the_tps)
		return -ENODEV;

	/* assumes non-SMP */
	local_irq_save(flags);
	if (mA >= 500)
		mA = 500;
	else if (mA >= 100)
		mA = 100;
	else
		mA = 0;
	the_tps->vbus = mA;
	if ((the_tps->chgstatus & TPS_CHG_USB)
			&& test_and_set_bit(
				FLAG_VBUS_CHANGED, &the_tps->flags)) {
		/* gadget drivers call this in_irq() */
		queue_delayed_work(system_power_efficient_wq, &the_tps->work,
				   0);
	}
	local_irq_restore(flags);

	return 0;
}
EXPORT_SYMBOL(tps65010_set_vbus_draw);

/*-------------------------------------------------------------------------*/
/* tps65010_set_gpio_out_value parameter:
 * gpio:  GPIO1, GPIO2, GPIO3 or GPIO4
 * value: LOW or HIGH
 */
int tps65010_set_gpio_out_value(unsigned gpio, unsigned value)
{
	int	 status;
	unsigned defgpio;

	if (!the_tps)
		return -ENODEV;
	if ((gpio < GPIO1) || (gpio > GPIO4))
		return -EINVAL;

	mutex_lock(&the_tps->lock);

	defgpio = i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO);

	/* Configure GPIO for output */
	defgpio |= 1 << (gpio + 3);

	/* Writing 1 forces a logic 0 on that GPIO and vice versa */
	switch (value) {
	case LOW:
		defgpio |= 1 << (gpio - 1);    /* set GPIO low by writing 1 */
		break;
	/* case HIGH: */
	default:
		defgpio &= ~(1 << (gpio - 1)); /* set GPIO high by writing 0 */
		break;
	}

	status = i2c_smbus_write_byte_data(the_tps->client,
		TPS_DEFGPIO, defgpio);

	pr_debug("%s: gpio%dout = %s, defgpio 0x%02x\n", DRIVER_NAME,
		gpio, value ? "high" : "low",
		i2c_smbus_read_byte_data(the_tps->client, TPS_DEFGPIO));

	mutex_unlock(&the_tps->lock);
	return status;
}
EXPORT_SYMBOL(tps65010_set_gpio_out_value);

/*-------------------------------------------------------------------------*/
/* tps65010_set_led parameter:
 * led:  LED1 or LED2
 * mode: ON, OFF or BLINK
 */
int tps65010_set_led(unsigned led, unsigned mode)
{
	int	 status;
	unsigned led_on, led_per, offs;

	if (!the_tps)
		return -ENODEV;

	if (led == LED1)
		offs = 0;
	else {
		offs = 2;
		led = LED2;
	}

	mutex_lock(&the_tps->lock);

	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(the_tps->client,
				TPS_LED1_ON + offs));

	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(the_tps->client,
				TPS_LED1_PER + offs));

	switch (mode) {
	case OFF:
		led_on  = 1 << 7;
		led_per = 0 << 7;
		break;
	case ON:
		led_on  = 1 << 7;
		led_per = 1 << 7;
		break;
	case BLINK:
		led_on  = 0x30 | (0 << 7);
		led_per = 0x08 | (1 << 7);
		break;
	default:
		printk(KERN_ERR "%s: Wrong mode parameter for set_led()\n",
		       DRIVER_NAME);
		mutex_unlock(&the_tps->lock);
		return -EINVAL;
	}

	status = i2c_smbus_write_byte_data(the_tps->client,
			TPS_LED1_ON + offs, led_on);

	if (status != 0) {
		printk(KERN_ERR "%s: Failed to write led%i_on register\n",
		       DRIVER_NAME, led);
		mutex_unlock(&the_tps->lock);
		return status;
	}

	pr_debug("%s: led%i_on   0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(the_tps->client, TPS_LED1_ON + offs));

	status = i2c_smbus_write_byte_data(the_tps->client,
			TPS_LED1_PER + offs, led_per);

	if (status != 0) {
		printk(KERN_ERR "%s: Failed to write led%i_per register\n",
		       DRIVER_NAME, led);
		mutex_unlock(&the_tps->lock);
		return status;
	}

	pr_debug("%s: led%i_per  0x%02x\n", DRIVER_NAME, led,
		i2c_smbus_read_byte_data(the_tps->client,
				TPS_LED1_PER + offs));

	mutex_unlock(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65010_set_led);

/*-------------------------------------------------------------------------*/
/* tps65010_set_vib parameter:
 * value: ON or OFF
 */
int tps65010_set_vib(unsigned value)
{
	int	 status;
	unsigned vdcdc2;

	if (!the_tps)
		return -ENODEV;

	mutex_lock(&the_tps->lock);

	vdcdc2 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC2);
	vdcdc2 &= ~(1 << 1);
	if (value)
		vdcdc2 |= (1 << 1);
	status = i2c_smbus_write_byte_data(the_tps->client,
		TPS_VDCDC2, vdcdc2);

	pr_debug("%s: vibrator %s\n", DRIVER_NAME, value ? "on" : "off");

	mutex_unlock(&the_tps->lock);
	return status;
}
EXPORT_SYMBOL(tps65010_set_vib);

/*-------------------------------------------------------------------------*/
/* tps65010_set_low_pwr parameter:
 * mode: ON or OFF
 */
int tps65010_set_low_pwr(unsigned mode)
{
	int	 status;
	unsigned vdcdc1;

	if (!the_tps)
		return -ENODEV;

	mutex_lock(&the_tps->lock);

	pr_debug("%s: %s low_pwr, vdcdc1 0x%02x\n", DRIVER_NAME,
		mode ? "enable" : "disable",
		i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));

	vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);

	switch (mode) {
	case OFF:
		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
		break;
	/* case ON: */
	default:
		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
		break;
	}

	status = i2c_smbus_write_byte_data(the_tps->client,
			TPS_VDCDC1, vdcdc1);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
			DRIVER_NAME);
	else
		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));

	mutex_unlock(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65010_set_low_pwr);

/*-------------------------------------------------------------------------*/
/* tps65010_config_vregs1 parameter:
 * value to be written to VREGS1 register
 * Note: The complete register is written, set all bits you need
 */
int tps65010_config_vregs1(unsigned value)
{
	int	 status;

	if (!the_tps)
		return -ENODEV;

	mutex_lock(&the_tps->lock);

	pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));

	status = i2c_smbus_write_byte_data(the_tps->client,
			TPS_VREGS1, value);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vregs1 register\n",
			DRIVER_NAME);
	else
		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(the_tps->client, TPS_VREGS1));

	mutex_unlock(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65010_config_vregs1);

int tps65010_config_vdcdc2(unsigned value)
{
	struct i2c_client *c;
	int	 status;

	if (!the_tps)
		return -ENODEV;

	c = the_tps->client;
	mutex_lock(&the_tps->lock);

	pr_debug("%s: vdcdc2 0x%02x\n", DRIVER_NAME,
		 i2c_smbus_read_byte_data(c, TPS_VDCDC2));

	status = i2c_smbus_write_byte_data(c, TPS_VDCDC2, value);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vdcdc2 register\n",
			DRIVER_NAME);
	else
		pr_debug("%s: vregs1 0x%02x\n", DRIVER_NAME,
			 i2c_smbus_read_byte_data(c, TPS_VDCDC2));

	mutex_unlock(&the_tps->lock);
	return status;
}
EXPORT_SYMBOL(tps65010_config_vdcdc2);

/*-------------------------------------------------------------------------*/
/* tps65013_set_low_pwr parameter:
 * mode: ON or OFF
 */

/* FIXME: Assumes AC or USB power is present. Setting AUA bit is not
	required if power supply is through a battery */

int tps65013_set_low_pwr(unsigned mode)
{
	int	 status;
	unsigned vdcdc1, chgconfig;

	if (!the_tps || the_tps->por)
		return -ENODEV;

	mutex_lock(&the_tps->lock);

	pr_debug("%s: %s low_pwr, chgconfig 0x%02x vdcdc1 0x%02x\n",
		DRIVER_NAME,
		mode ? "enable" : "disable",
		i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG),
		i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));

	chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
	vdcdc1 = i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1);

	switch (mode) {
	case OFF:
		chgconfig &= ~TPS65013_AUA; /* disable AUA bit */
		vdcdc1 &= ~TPS_ENABLE_LP; /* disable ENABLE_LP bit */
		break;
	/* case ON: */
	default:
		chgconfig |= TPS65013_AUA;  /* enable AUA bit */
		vdcdc1 |= TPS_ENABLE_LP;  /* enable ENABLE_LP bit */
		break;
	}

	status = i2c_smbus_write_byte_data(the_tps->client,
			TPS_CHGCONFIG, chgconfig);
	if (status != 0) {
		printk(KERN_ERR "%s: Failed to write chconfig register\n",
	 DRIVER_NAME);
		mutex_unlock(&the_tps->lock);
		return status;
	}

	chgconfig = i2c_smbus_read_byte_data(the_tps->client, TPS_CHGCONFIG);
	the_tps->chgconf = chgconfig;
	show_chgconfig(0, "chgconf", chgconfig);

	status = i2c_smbus_write_byte_data(the_tps->client,
			TPS_VDCDC1, vdcdc1);

	if (status != 0)
		printk(KERN_ERR "%s: Failed to write vdcdc1 register\n",
	 DRIVER_NAME);
	else
		pr_debug("%s: vdcdc1 0x%02x\n", DRIVER_NAME,
			i2c_smbus_read_byte_data(the_tps->client, TPS_VDCDC1));

	mutex_unlock(&the_tps->lock);

	return status;
}
EXPORT_SYMBOL(tps65013_set_low_pwr);

/*-------------------------------------------------------------------------*/

static int __init tps_init(void)
{
	u32	tries = 3;
	int	status = -ENODEV;

	printk(KERN_INFO "%s: version %s\n", DRIVER_NAME, DRIVER_VERSION);

	/* some boards have startup glitches */
	while (tries--) {
		status = i2c_add_driver(&tps65010_driver);
		if (the_tps)
			break;
		i2c_del_driver(&tps65010_driver);
		if (!tries) {
			printk(KERN_ERR "%s: no chip?\n", DRIVER_NAME);
			return -ENODEV;
		}
		pr_debug("%s: re-probe ...\n", DRIVER_NAME);
		msleep(10);
	}

	return status;
}
/* NOTE:  this MUST be initialized before the other parts of the system
 * that rely on it ... but after the i2c bus on which this relies.
 * That is, much earlier than on PC-type systems, which don't often use
 * I2C as a core system bus.
 */
subsys_initcall(tps_init);

static void __exit tps_exit(void)
{
	i2c_del_driver(&tps65010_driver);
}
module_exit(tps_exit);