aboutsummaryrefslogtreecommitdiff
path: root/drivers/mfd/ab8500-core.c
blob: dac0e299860353f0a299a8b66c14c745e587a133 (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
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
/*
 * Copyright (C) ST-Ericsson SA 2010
 *
 * License Terms: GNU General Public License v2
 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
 * Author: Rabin Vincent <rabin.vincent@stericsson.com>
 * Author: Mattias Wallin <mattias.wallin@stericsson.com>
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/init.h>
#include <linux/irq.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/dbx500-prcmu.h>
#include <linux/regulator/ab8500.h>
#include <linux/of.h>
#include <linux/of_device.h>

/*
 * Interrupt register offsets
 * Bank : 0x0E
 */
#define AB8500_IT_SOURCE1_REG		0x00
#define AB8500_IT_SOURCE2_REG		0x01
#define AB8500_IT_SOURCE3_REG		0x02
#define AB8500_IT_SOURCE4_REG		0x03
#define AB8500_IT_SOURCE5_REG		0x04
#define AB8500_IT_SOURCE6_REG		0x05
#define AB8500_IT_SOURCE7_REG		0x06
#define AB8500_IT_SOURCE8_REG		0x07
#define AB9540_IT_SOURCE13_REG		0x0C
#define AB8500_IT_SOURCE19_REG		0x12
#define AB8500_IT_SOURCE20_REG		0x13
#define AB8500_IT_SOURCE21_REG		0x14
#define AB8500_IT_SOURCE22_REG		0x15
#define AB8500_IT_SOURCE23_REG		0x16
#define AB8500_IT_SOURCE24_REG		0x17

/*
 * latch registers
 */
#define AB8500_IT_LATCH1_REG		0x20
#define AB8500_IT_LATCH2_REG		0x21
#define AB8500_IT_LATCH3_REG		0x22
#define AB8500_IT_LATCH4_REG		0x23
#define AB8500_IT_LATCH5_REG		0x24
#define AB8500_IT_LATCH6_REG		0x25
#define AB8500_IT_LATCH7_REG		0x26
#define AB8500_IT_LATCH8_REG		0x27
#define AB8500_IT_LATCH9_REG		0x28
#define AB8500_IT_LATCH10_REG		0x29
#define AB8500_IT_LATCH12_REG		0x2B
#define AB9540_IT_LATCH13_REG		0x2C
#define AB8500_IT_LATCH19_REG		0x32
#define AB8500_IT_LATCH20_REG		0x33
#define AB8500_IT_LATCH21_REG		0x34
#define AB8500_IT_LATCH22_REG		0x35
#define AB8500_IT_LATCH23_REG		0x36
#define AB8500_IT_LATCH24_REG		0x37

/*
 * mask registers
 */

#define AB8500_IT_MASK1_REG		0x40
#define AB8500_IT_MASK2_REG		0x41
#define AB8500_IT_MASK3_REG		0x42
#define AB8500_IT_MASK4_REG		0x43
#define AB8500_IT_MASK5_REG		0x44
#define AB8500_IT_MASK6_REG		0x45
#define AB8500_IT_MASK7_REG		0x46
#define AB8500_IT_MASK8_REG		0x47
#define AB8500_IT_MASK9_REG		0x48
#define AB8500_IT_MASK10_REG		0x49
#define AB8500_IT_MASK11_REG		0x4A
#define AB8500_IT_MASK12_REG		0x4B
#define AB8500_IT_MASK13_REG		0x4C
#define AB8500_IT_MASK14_REG		0x4D
#define AB8500_IT_MASK15_REG		0x4E
#define AB8500_IT_MASK16_REG		0x4F
#define AB8500_IT_MASK17_REG		0x50
#define AB8500_IT_MASK18_REG		0x51
#define AB8500_IT_MASK19_REG		0x52
#define AB8500_IT_MASK20_REG		0x53
#define AB8500_IT_MASK21_REG		0x54
#define AB8500_IT_MASK22_REG		0x55
#define AB8500_IT_MASK23_REG		0x56
#define AB8500_IT_MASK24_REG		0x57

/*
 * latch hierarchy registers
 */
#define AB8500_IT_LATCHHIER1_REG	0x60
#define AB8500_IT_LATCHHIER2_REG	0x61
#define AB8500_IT_LATCHHIER3_REG	0x62

#define AB8500_IT_LATCHHIER_NUM		3

#define AB8500_REV_REG			0x80
#define AB8500_IC_NAME_REG		0x82
#define AB8500_SWITCH_OFF_STATUS	0x00

#define AB8500_TURN_ON_STATUS		0x00

static bool no_bm; /* No battery management */
module_param(no_bm, bool, S_IRUGO);

#define AB9540_MODEM_CTRL2_REG			0x23
#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT	BIT(2)

/*
 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
 * numbers are indexed into this array with (num / 8). The interupts are
 * defined in linux/mfd/ab8500.h
 *
 * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
 * offset 0.
 */
/* AB8500 support */
static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
};

/* AB9540 support */
static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24,
};

static const char ab8500_version_str[][7] = {
	[AB8500_VERSION_AB8500] = "AB8500",
	[AB8500_VERSION_AB8505] = "AB8505",
	[AB8500_VERSION_AB9540] = "AB9540",
	[AB8500_VERSION_AB8540] = "AB8540",
};

static int ab8500_i2c_write(struct ab8500 *ab8500, u16 addr, u8 data)
{
	int ret;

	ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
	if (ret < 0)
		dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
	return ret;
}

static int ab8500_i2c_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
	u8 data)
{
	int ret;

	ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
		&mask, 1);
	if (ret < 0)
		dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
	return ret;
}

static int ab8500_i2c_read(struct ab8500 *ab8500, u16 addr)
{
	int ret;
	u8 data;

	ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
	if (ret < 0) {
		dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
		return ret;
	}
	return (int)data;
}

static int ab8500_get_chip_id(struct device *dev)
{
	struct ab8500 *ab8500;

	if (!dev)
		return -EINVAL;
	ab8500 = dev_get_drvdata(dev->parent);
	return ab8500 ? (int)ab8500->chip_id : -EINVAL;
}

static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
	u8 reg, u8 data)
{
	int ret;
	/*
	 * Put the u8 bank and u8 register together into a an u16.
	 * The bank on higher 8 bits and register in lower 8 bits.
	 * */
	u16 addr = ((u16)bank) << 8 | reg;

	dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);

	mutex_lock(&ab8500->lock);

	ret = ab8500->write(ab8500, addr, data);
	if (ret < 0)
		dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
			addr, ret);
	mutex_unlock(&ab8500->lock);

	return ret;
}

static int ab8500_set_register(struct device *dev, u8 bank,
	u8 reg, u8 value)
{
	int ret;
	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);

	atomic_inc(&ab8500->transfer_ongoing);
	ret = set_register_interruptible(ab8500, bank, reg, value);
	atomic_dec(&ab8500->transfer_ongoing);
	return ret;
}

static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
	u8 reg, u8 *value)
{
	int ret;
	/* put the u8 bank and u8 reg together into a an u16.
	 * bank on higher 8 bits and reg in lower */
	u16 addr = ((u16)bank) << 8 | reg;

	mutex_lock(&ab8500->lock);

	ret = ab8500->read(ab8500, addr);
	if (ret < 0)
		dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
			addr, ret);
	else
		*value = ret;

	mutex_unlock(&ab8500->lock);
	dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);

	return ret;
}

static int ab8500_get_register(struct device *dev, u8 bank,
	u8 reg, u8 *value)
{
	int ret;
	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);

	atomic_inc(&ab8500->transfer_ongoing);
	ret = get_register_interruptible(ab8500, bank, reg, value);
	atomic_dec(&ab8500->transfer_ongoing);
	return ret;
}

static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
	u8 reg, u8 bitmask, u8 bitvalues)
{
	int ret;
	/* put the u8 bank and u8 reg together into a an u16.
	 * bank on higher 8 bits and reg in lower */
	u16 addr = ((u16)bank) << 8 | reg;

	mutex_lock(&ab8500->lock);

	if (ab8500->write_masked == NULL) {
		u8 data;

		ret = ab8500->read(ab8500, addr);
		if (ret < 0) {
			dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
				addr, ret);
			goto out;
		}

		data = (u8)ret;
		data = (~bitmask & data) | (bitmask & bitvalues);

		ret = ab8500->write(ab8500, addr, data);
		if (ret < 0)
			dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
				addr, ret);

		dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr,
			data);
		goto out;
	}
	ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
	if (ret < 0)
		dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
			ret);
out:
	mutex_unlock(&ab8500->lock);
	return ret;
}

static int ab8500_mask_and_set_register(struct device *dev,
	u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
{
	int ret;
	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);

	atomic_inc(&ab8500->transfer_ongoing);
	ret= mask_and_set_register_interruptible(ab8500, bank, reg,
						 bitmask, bitvalues);
	atomic_dec(&ab8500->transfer_ongoing);
	return ret;
}

static struct abx500_ops ab8500_ops = {
	.get_chip_id = ab8500_get_chip_id,
	.get_register = ab8500_get_register,
	.set_register = ab8500_set_register,
	.get_register_page = NULL,
	.set_register_page = NULL,
	.mask_and_set_register = ab8500_mask_and_set_register,
	.event_registers_startup_state_get = NULL,
	.startup_irq_enabled = NULL,
};

static void ab8500_irq_lock(struct irq_data *data)
{
	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);

	mutex_lock(&ab8500->irq_lock);
	atomic_inc(&ab8500->transfer_ongoing);
}

static void ab8500_irq_sync_unlock(struct irq_data *data)
{
	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
	int i;

	for (i = 0; i < ab8500->mask_size; i++) {
		u8 old = ab8500->oldmask[i];
		u8 new = ab8500->mask[i];
		int reg;

		if (new == old)
			continue;

		/*
		 * Interrupt register 12 doesn't exist prior to AB8500 version
		 * 2.0
		 */
		if (ab8500->irq_reg_offset[i] == 11 &&
			is_ab8500_1p1_or_earlier(ab8500))
			continue;

		ab8500->oldmask[i] = new;

		reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
		set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
	}
	atomic_dec(&ab8500->transfer_ongoing);
	mutex_unlock(&ab8500->irq_lock);
}

static void ab8500_irq_mask(struct irq_data *data)
{
	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
	int offset = data->irq - ab8500->irq_base;
	int index = offset / 8;
	int mask = 1 << (offset % 8);

	ab8500->mask[index] |= mask;
}

static void ab8500_irq_unmask(struct irq_data *data)
{
	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
	int offset = data->irq - ab8500->irq_base;
	int index = offset / 8;
	int mask = 1 << (offset % 8);

	ab8500->mask[index] &= ~mask;
}

static struct irq_chip ab8500_irq_chip = {
	.name			= "ab8500",
	.irq_bus_lock		= ab8500_irq_lock,
	.irq_bus_sync_unlock	= ab8500_irq_sync_unlock,
	.irq_mask		= ab8500_irq_mask,
	.irq_disable		= ab8500_irq_mask,
	.irq_unmask		= ab8500_irq_unmask,
};

static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
					int latch_offset, u8 latch_val)
{
	int int_bit = __ffs(latch_val);
	int line, i;

	do {
		int_bit = __ffs(latch_val);

		for (i = 0; i < ab8500->mask_size; i++)
			if (ab8500->irq_reg_offset[i] == latch_offset)
				break;

		if (i >= ab8500->mask_size) {
			dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
					latch_offset);
			return -ENXIO;
		}

		line = (i << 3) + int_bit;
		latch_val &= ~(1 << int_bit);

		handle_nested_irq(ab8500->irq_base + line);
	} while (latch_val);

	return 0;
}

static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
					int hier_offset, u8 hier_val)
{
	int latch_bit, status;
	u8 latch_offset, latch_val;

	do {
		latch_bit = __ffs(hier_val);
		latch_offset = (hier_offset << 3) + latch_bit;

		/* Fix inconsistent ITFromLatch25 bit mapping... */
		if (unlikely(latch_offset == 17))
			latch_offset = 24;

		status = get_register_interruptible(ab8500,
				AB8500_INTERRUPT,
				AB8500_IT_LATCH1_REG + latch_offset,
				&latch_val);
		if (status < 0 || latch_val == 0)
			goto discard;

		status = ab8500_handle_hierarchical_line(ab8500,
				latch_offset, latch_val);
		if (status < 0)
			return status;
discard:
		hier_val &= ~(1 << latch_bit);
	} while (hier_val);

	return 0;
}

static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
{
	struct ab8500 *ab8500 = dev;
	u8 i;

	dev_vdbg(ab8500->dev, "interrupt\n");

	/*  Hierarchical interrupt version */
	for (i = 0; i < AB8500_IT_LATCHHIER_NUM; i++) {
		int status;
		u8 hier_val;

		status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
			AB8500_IT_LATCHHIER1_REG + i, &hier_val);
		if (status < 0 || hier_val == 0)
			continue;

		status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
		if (status < 0)
			break;
	}
	return IRQ_HANDLED;
}

static irqreturn_t ab8500_irq(int irq, void *dev)
{
	struct ab8500 *ab8500 = dev;
	int i;

	dev_vdbg(ab8500->dev, "interrupt\n");

	atomic_inc(&ab8500->transfer_ongoing);

	for (i = 0; i < ab8500->mask_size; i++) {
		int regoffset = ab8500->irq_reg_offset[i];
		int status;
		u8 value;

		/*
		 * Interrupt register 12 doesn't exist prior to AB8500 version
		 * 2.0
		 */
		if (regoffset == 11 && is_ab8500_1p1_or_earlier(ab8500))
			continue;

		status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
			AB8500_IT_LATCH1_REG + regoffset, &value);
		if (status < 0 || value == 0)
			continue;

		do {
			int bit = __ffs(value);
			int line = i * 8 + bit;

			handle_nested_irq(ab8500->irq_base + line);
			value &= ~(1 << bit);

		} while (value);
	}
	atomic_dec(&ab8500->transfer_ongoing);
	return IRQ_HANDLED;
}

static int ab8500_irq_init(struct ab8500 *ab8500)
{
	int base = ab8500->irq_base;
	int irq;
	int num_irqs;

	if (is_ab9540(ab8500))
		num_irqs = AB9540_NR_IRQS;
	else if (is_ab8505(ab8500))
		num_irqs = AB8505_NR_IRQS;
	else
		num_irqs = AB8500_NR_IRQS;

	for (irq = base; irq < base + num_irqs; irq++) {
		irq_set_chip_data(irq, ab8500);
		irq_set_chip_and_handler(irq, &ab8500_irq_chip,
					 handle_simple_irq);
		irq_set_nested_thread(irq, 1);
#ifdef CONFIG_ARM
		set_irq_flags(irq, IRQF_VALID);
#else
		irq_set_noprobe(irq);
#endif
	}

	return 0;
}

static void ab8500_irq_remove(struct ab8500 *ab8500)
{
	int base = ab8500->irq_base;
	int irq;
	int num_irqs;

	if (is_ab9540(ab8500))
		num_irqs = AB9540_NR_IRQS;
	else if (is_ab8505(ab8500))
		num_irqs = AB8505_NR_IRQS;
	else
		num_irqs = AB8500_NR_IRQS;

	for (irq = base; irq < base + num_irqs; irq++) {
#ifdef CONFIG_ARM
		set_irq_flags(irq, 0);
#endif
		irq_set_chip_and_handler(irq, NULL, NULL);
		irq_set_chip_data(irq, NULL);
	}
}

int ab8500_suspend(struct ab8500 *ab8500)
{
	if (atomic_read(&ab8500->transfer_ongoing))
		return -EINVAL;
	else
		return 0;
}

/* AB8500 GPIO Resources */
static struct resource __devinitdata ab8500_gpio_resources[] = {
	{
		.name	= "GPIO_INT6",
		.start	= AB8500_INT_GPIO6R,
		.end	= AB8500_INT_GPIO41F,
		.flags	= IORESOURCE_IRQ,
	}
};

/* AB9540 GPIO Resources */
static struct resource __devinitdata ab9540_gpio_resources[] = {
	{
		.name	= "GPIO_INT6",
		.start	= AB8500_INT_GPIO6R,
		.end	= AB8500_INT_GPIO41F,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "GPIO_INT14",
		.start	= AB9540_INT_GPIO50R,
		.end	= AB9540_INT_GPIO54R,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "GPIO_INT15",
		.start	= AB9540_INT_GPIO50F,
		.end	= AB9540_INT_GPIO54F,
		.flags	= IORESOURCE_IRQ,
	}
};

static struct resource __devinitdata ab8500_gpadc_resources[] = {
	{
		.name	= "HW_CONV_END",
		.start	= AB8500_INT_GP_HW_ADC_CONV_END,
		.end	= AB8500_INT_GP_HW_ADC_CONV_END,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "SW_CONV_END",
		.start	= AB8500_INT_GP_SW_ADC_CONV_END,
		.end	= AB8500_INT_GP_SW_ADC_CONV_END,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_rtc_resources[] = {
	{
		.name	= "60S",
		.start	= AB8500_INT_RTC_60S,
		.end	= AB8500_INT_RTC_60S,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "ALARM",
		.start	= AB8500_INT_RTC_ALARM,
		.end	= AB8500_INT_RTC_ALARM,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_poweronkey_db_resources[] = {
	{
		.name	= "ONKEY_DBF",
		.start	= AB8500_INT_PON_KEY1DB_F,
		.end	= AB8500_INT_PON_KEY1DB_F,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "ONKEY_DBR",
		.start	= AB8500_INT_PON_KEY1DB_R,
		.end	= AB8500_INT_PON_KEY1DB_R,
		.flags	= IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_av_acc_detect_resources[] = {
	{
	       .name = "ACC_DETECT_1DB_F",
	       .start = AB8500_INT_ACC_DETECT_1DB_F,
	       .end = AB8500_INT_ACC_DETECT_1DB_F,
	       .flags = IORESOURCE_IRQ,
	},
	{
	       .name = "ACC_DETECT_1DB_R",
	       .start = AB8500_INT_ACC_DETECT_1DB_R,
	       .end = AB8500_INT_ACC_DETECT_1DB_R,
	       .flags = IORESOURCE_IRQ,
	},
	{
	       .name = "ACC_DETECT_21DB_F",
	       .start = AB8500_INT_ACC_DETECT_21DB_F,
	       .end = AB8500_INT_ACC_DETECT_21DB_F,
	       .flags = IORESOURCE_IRQ,
	},
	{
	       .name = "ACC_DETECT_21DB_R",
	       .start = AB8500_INT_ACC_DETECT_21DB_R,
	       .end = AB8500_INT_ACC_DETECT_21DB_R,
	       .flags = IORESOURCE_IRQ,
	},
	{
	       .name = "ACC_DETECT_22DB_F",
	       .start = AB8500_INT_ACC_DETECT_22DB_F,
	       .end = AB8500_INT_ACC_DETECT_22DB_F,
	       .flags = IORESOURCE_IRQ,
	},
	{
	       .name = "ACC_DETECT_22DB_R",
	       .start = AB8500_INT_ACC_DETECT_22DB_R,
	       .end = AB8500_INT_ACC_DETECT_22DB_R,
	       .flags = IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_charger_resources[] = {
	{
		.name = "MAIN_CH_UNPLUG_DET",
		.start = AB8500_INT_MAIN_CH_UNPLUG_DET,
		.end = AB8500_INT_MAIN_CH_UNPLUG_DET,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "MAIN_CHARGE_PLUG_DET",
		.start = AB8500_INT_MAIN_CH_PLUG_DET,
		.end = AB8500_INT_MAIN_CH_PLUG_DET,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "VBUS_DET_R",
		.start = AB8500_INT_VBUS_DET_R,
		.end = AB8500_INT_VBUS_DET_R,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "VBUS_DET_F",
		.start = AB8500_INT_VBUS_DET_F,
		.end = AB8500_INT_VBUS_DET_F,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_LINK_STATUS",
		.start = AB8500_INT_USB_LINK_STATUS,
		.end = AB8500_INT_USB_LINK_STATUS,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "VBUS_OVV",
		.start = AB8500_INT_VBUS_OVV,
		.end = AB8500_INT_VBUS_OVV,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_CH_TH_PROT_R",
		.start = AB8500_INT_USB_CH_TH_PROT_R,
		.end = AB8500_INT_USB_CH_TH_PROT_R,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_CH_TH_PROT_F",
		.start = AB8500_INT_USB_CH_TH_PROT_F,
		.end = AB8500_INT_USB_CH_TH_PROT_F,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "MAIN_EXT_CH_NOT_OK",
		.start = AB8500_INT_MAIN_EXT_CH_NOT_OK,
		.end = AB8500_INT_MAIN_EXT_CH_NOT_OK,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "MAIN_CH_TH_PROT_R",
		.start = AB8500_INT_MAIN_CH_TH_PROT_R,
		.end = AB8500_INT_MAIN_CH_TH_PROT_R,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "MAIN_CH_TH_PROT_F",
		.start = AB8500_INT_MAIN_CH_TH_PROT_F,
		.end = AB8500_INT_MAIN_CH_TH_PROT_F,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_CHARGER_NOT_OKR",
		.start = AB8500_INT_USB_CHARGER_NOT_OKR,
		.end = AB8500_INT_USB_CHARGER_NOT_OKR,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "CH_WD_EXP",
		.start = AB8500_INT_CH_WD_EXP,
		.end = AB8500_INT_CH_WD_EXP,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_btemp_resources[] = {
	{
		.name = "BAT_CTRL_INDB",
		.start = AB8500_INT_BAT_CTRL_INDB,
		.end = AB8500_INT_BAT_CTRL_INDB,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "BTEMP_LOW",
		.start = AB8500_INT_BTEMP_LOW,
		.end = AB8500_INT_BTEMP_LOW,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "BTEMP_HIGH",
		.start = AB8500_INT_BTEMP_HIGH,
		.end = AB8500_INT_BTEMP_HIGH,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "BTEMP_LOW_MEDIUM",
		.start = AB8500_INT_BTEMP_LOW_MEDIUM,
		.end = AB8500_INT_BTEMP_LOW_MEDIUM,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "BTEMP_MEDIUM_HIGH",
		.start = AB8500_INT_BTEMP_MEDIUM_HIGH,
		.end = AB8500_INT_BTEMP_MEDIUM_HIGH,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_fg_resources[] = {
	{
		.name = "NCONV_ACCU",
		.start = AB8500_INT_CCN_CONV_ACC,
		.end = AB8500_INT_CCN_CONV_ACC,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "BATT_OVV",
		.start = AB8500_INT_BATT_OVV,
		.end = AB8500_INT_BATT_OVV,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "LOW_BAT_F",
		.start = AB8500_INT_LOW_BAT_F,
		.end = AB8500_INT_LOW_BAT_F,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "LOW_BAT_R",
		.start = AB8500_INT_LOW_BAT_R,
		.end = AB8500_INT_LOW_BAT_R,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "CC_INT_CALIB",
		.start = AB8500_INT_CC_INT_CALIB,
		.end = AB8500_INT_CC_INT_CALIB,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "CCEOC",
		.start = AB8500_INT_CCEOC,
		.end = AB8500_INT_CCEOC,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_chargalg_resources[] = {};

#ifdef CONFIG_DEBUG_FS
static struct resource __devinitdata ab8500_debug_resources[] = {
	{
		.name	= "IRQ_FIRST",
		.start	= AB8500_INT_MAIN_EXT_CH_NOT_OK,
		.end	= AB8500_INT_MAIN_EXT_CH_NOT_OK,
		.flags	= IORESOURCE_IRQ,
	},
	{
		.name	= "IRQ_LAST",
		.start	= AB8500_INT_XTAL32K_KO,
		.end	= AB8500_INT_XTAL32K_KO,
		.flags	= IORESOURCE_IRQ,
	},
};
#endif

static struct resource __devinitdata ab8500_usb_resources[] = {
	{
		.name = "ID_WAKEUP_R",
		.start = AB8500_INT_ID_WAKEUP_R,
		.end = AB8500_INT_ID_WAKEUP_R,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "ID_WAKEUP_F",
		.start = AB8500_INT_ID_WAKEUP_F,
		.end = AB8500_INT_ID_WAKEUP_F,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "VBUS_DET_F",
		.start = AB8500_INT_VBUS_DET_F,
		.end = AB8500_INT_VBUS_DET_F,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "VBUS_DET_R",
		.start = AB8500_INT_VBUS_DET_R,
		.end = AB8500_INT_VBUS_DET_R,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_LINK_STATUS",
		.start = AB8500_INT_USB_LINK_STATUS,
		.end = AB8500_INT_USB_LINK_STATUS,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_ADP_PROBE_PLUG",
		.start = AB8500_INT_ADP_PROBE_PLUG,
		.end = AB8500_INT_ADP_PROBE_PLUG,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name = "USB_ADP_PROBE_UNPLUG",
		.start = AB8500_INT_ADP_PROBE_UNPLUG,
		.end = AB8500_INT_ADP_PROBE_UNPLUG,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8505_iddet_resources[] = {
	{
		.name  = "KeyDeglitch",
		.start = AB8505_INT_KEYDEGLITCH,
		.end   = AB8505_INT_KEYDEGLITCH,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name  = "KP",
		.start = AB8505_INT_KP,
		.end   = AB8505_INT_KP,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name  = "IKP",
		.start = AB8505_INT_IKP,
		.end   = AB8505_INT_IKP,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name  = "IKR",
		.start = AB8505_INT_IKR,
		.end   = AB8505_INT_IKR,
		.flags = IORESOURCE_IRQ,
	},
	{
		.name  = "KeyStuck",
		.start = AB8505_INT_KEYSTUCK,
		.end   = AB8505_INT_KEYSTUCK,
		.flags = IORESOURCE_IRQ,
	},
};

static struct resource __devinitdata ab8500_temp_resources[] = {
	{
		.name  = "AB8500_TEMP_WARM",
		.start = AB8500_INT_TEMP_WARM,
		.end   = AB8500_INT_TEMP_WARM,
		.flags = IORESOURCE_IRQ,
	},
};

static struct mfd_cell __devinitdata abx500_common_devs[] = {
#ifdef CONFIG_DEBUG_FS
	{
		.name = "ab8500-debug",
		.num_resources = ARRAY_SIZE(ab8500_debug_resources),
		.resources = ab8500_debug_resources,
	},
#endif
	{
		.name = "ab8500-sysctrl",
	},
	{
		.name = "ab8500-regulator",
	},
	{
		.name = "ab8500-gpadc",
		.num_resources = ARRAY_SIZE(ab8500_gpadc_resources),
		.resources = ab8500_gpadc_resources,
	},
	{
		.name = "ab8500-rtc",
		.num_resources = ARRAY_SIZE(ab8500_rtc_resources),
		.resources = ab8500_rtc_resources,
	},
	{
		.name = "ab8500-acc-det",
		.num_resources = ARRAY_SIZE(ab8500_av_acc_detect_resources),
		.resources = ab8500_av_acc_detect_resources,
	},
	{
		.name = "ab8500-poweron-key",
		.num_resources = ARRAY_SIZE(ab8500_poweronkey_db_resources),
		.resources = ab8500_poweronkey_db_resources,
	},
	{
		.name = "ab8500-pwm",
		.id = 1,
	},
	{
		.name = "ab8500-pwm",
		.id = 2,
	},
	{
		.name = "ab8500-pwm",
		.id = 3,
	},
	{ .name = "ab8500-leds", },
	{
		.name = "ab8500-denc",
	},
	{
		.name = "ab8500-temp",
		.num_resources = ARRAY_SIZE(ab8500_temp_resources),
		.resources = ab8500_temp_resources,
	},
};

static struct mfd_cell __devinitdata ab8500_bm_devs[] = {
	{
		.name = "ab8500-charger",
		.num_resources = ARRAY_SIZE(ab8500_charger_resources),
		.resources = ab8500_charger_resources,
	},
	{
		.name = "ab8500-btemp",
		.num_resources = ARRAY_SIZE(ab8500_btemp_resources),
		.resources = ab8500_btemp_resources,
	},
	{
		.name = "ab8500-fg",
		.num_resources = ARRAY_SIZE(ab8500_fg_resources),
		.resources = ab8500_fg_resources,
	},
	{
		.name = "ab8500-chargalg",
		.num_resources = ARRAY_SIZE(ab8500_chargalg_resources),
		.resources = ab8500_chargalg_resources,
	},
};

static struct mfd_cell __devinitdata ab8500_devs[] = {
	{
		.name = "ab8500-gpio",
		.num_resources = ARRAY_SIZE(ab8500_gpio_resources),
		.resources = ab8500_gpio_resources,
	},
	{
		.name = "ab8500-usb",
		.num_resources = ARRAY_SIZE(ab8500_usb_resources),
		.resources = ab8500_usb_resources,
	},
	{
		.name = "ab8500-codec",
	},
};

static struct mfd_cell __devinitdata ab9540_devs[] = {
	{
		.name = "ab8500-gpio",
		.num_resources = ARRAY_SIZE(ab9540_gpio_resources),
		.resources = ab9540_gpio_resources,
	},
	{
		.name = "ab9540-usb",
		.num_resources = ARRAY_SIZE(ab8500_usb_resources),
		.resources = ab8500_usb_resources,
	},
	{
		.name = "ab9540-codec",
	},
};

/* Device list common to ab9540 and ab8505 */
static struct mfd_cell __devinitdata ab9540_ab8505_devs[] = {
	{
		.name = "ab-iddet",
		.num_resources = ARRAY_SIZE(ab8505_iddet_resources),
		.resources = ab8505_iddet_resources,
	},
};

static ssize_t show_chip_id(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct ab8500 *ab8500;

	ab8500 = dev_get_drvdata(dev);
	return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
}

/*
 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
 * 0x01 Swoff bit programming
 * 0x02 Thermal protection activation
 * 0x04 Vbat lower then BattOk falling threshold
 * 0x08 Watchdog expired
 * 0x10 Non presence of 32kHz clock
 * 0x20 Battery level lower than power on reset threshold
 * 0x40 Power on key 1 pressed longer than 10 seconds
 * 0x80 DB8500 thermal shutdown
 */
static ssize_t show_switch_off_status(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int ret;
	u8 value;
	struct ab8500 *ab8500;

	ab8500 = dev_get_drvdata(dev);
	ret = get_register_interruptible(ab8500, AB8500_RTC,
		AB8500_SWITCH_OFF_STATUS, &value);
	if (ret < 0)
		return ret;
	return sprintf(buf, "%#x\n", value);
}

/*
 * ab8500 has turned on due to (TURN_ON_STATUS):
 * 0x01 PORnVbat
 * 0x02 PonKey1dbF
 * 0x04 PonKey2dbF
 * 0x08 RTCAlarm
 * 0x10 MainChDet
 * 0x20 VbusDet
 * 0x40 UsbIDDetect
 * 0x80 Reserved
 */
static ssize_t show_turn_on_status(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	int ret;
	u8 value;
	struct ab8500 *ab8500;

	ab8500 = dev_get_drvdata(dev);
	ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
		AB8500_TURN_ON_STATUS, &value);
	if (ret < 0)
		return ret;
	return sprintf(buf, "%#x\n", value);
}

static ssize_t show_ab9540_dbbrstn(struct device *dev,
				struct device_attribute *attr, char *buf)
{
	struct ab8500 *ab8500;
	int ret;
	u8 value;

	ab8500 = dev_get_drvdata(dev);

	ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
		AB9540_MODEM_CTRL2_REG, &value);
	if (ret < 0)
		return ret;

	return sprintf(buf, "%d\n",
			(value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
}

static ssize_t store_ab9540_dbbrstn(struct device *dev,
	struct device_attribute *attr, const char *buf, size_t count)
{
	struct ab8500 *ab8500;
	int ret = count;
	int err;
	u8 bitvalues;

	ab8500 = dev_get_drvdata(dev);

	if (count > 0) {
		switch (buf[0]) {
		case '0':
			bitvalues = 0;
			break;
		case '1':
			bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
			break;
		default:
			goto exit;
		}

		err = mask_and_set_register_interruptible(ab8500,
			AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
			AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
		if (err)
			dev_info(ab8500->dev,
				"Failed to set DBBRSTN %c, err %#x\n",
				buf[0], err);
	}

exit:
	return ret;
}

static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
			show_ab9540_dbbrstn, store_ab9540_dbbrstn);

static struct attribute *ab8500_sysfs_entries[] = {
	&dev_attr_chip_id.attr,
	&dev_attr_switch_off_status.attr,
	&dev_attr_turn_on_status.attr,
	NULL,
};

static struct attribute *ab9540_sysfs_entries[] = {
	&dev_attr_chip_id.attr,
	&dev_attr_switch_off_status.attr,
	&dev_attr_turn_on_status.attr,
	&dev_attr_dbbrstn.attr,
	NULL,
};

static struct attribute_group ab8500_attr_group = {
	.attrs	= ab8500_sysfs_entries,
};

static struct attribute_group ab9540_attr_group = {
	.attrs	= ab9540_sysfs_entries,
};

static const struct of_device_id ab8500_match[] = {
	{
		.compatible = "stericsson,ab8500",
		.data = (void *)AB8500_VERSION_AB8500,
	},
	{},
};

static int __devinit ab8500_probe(struct platform_device *pdev)
{
	struct ab8500_platform_data *plat = dev_get_platdata(&pdev->dev);
	const struct platform_device_id *platid = platform_get_device_id(pdev);
	enum ab8500_version version = AB8500_VERSION_UNDEFINED;
	struct device_node *np = pdev->dev.of_node;
	struct ab8500 *ab8500;
	struct resource *resource;
	int ret;
	int i;
	u8 value;

	ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL);
	if (!ab8500)
		return -ENOMEM;

	if (plat)
		ab8500->irq_base = plat->irq_base;
	else if (np)
		ret = of_property_read_u32(np, "stericsson,irq-base", &ab8500->irq_base);

	if (!ab8500->irq_base) {
		dev_info(&pdev->dev, "couldn't find irq-base\n");
		ret = -EINVAL;
		goto out_free_ab8500;
	}

	ab8500->dev = &pdev->dev;

	resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!resource) {
		ret = -ENODEV;
		goto out_free_ab8500;
	}

	ab8500->irq = resource->start;

	ab8500->read = ab8500_i2c_read;
	ab8500->write = ab8500_i2c_write;
	ab8500->write_masked = ab8500_i2c_write_masked;

	mutex_init(&ab8500->lock);
	mutex_init(&ab8500->irq_lock);
	atomic_set(&ab8500->transfer_ongoing, 0);

	platform_set_drvdata(pdev, ab8500);

	if (platid)
		version = platid->driver_data;
	else if (np)
		version = (unsigned int)
			of_match_device(ab8500_match, &pdev->dev)->data;

	if (version != AB8500_VERSION_UNDEFINED)
		ab8500->version = version;
	else {
		ret = get_register_interruptible(ab8500, AB8500_MISC,
			AB8500_IC_NAME_REG, &value);
		if (ret < 0)
			goto out_free_ab8500;

		ab8500->version = value;
	}

	ret = get_register_interruptible(ab8500, AB8500_MISC,
		AB8500_REV_REG, &value);
	if (ret < 0)
		goto out_free_ab8500;

	ab8500->chip_id = value;

	dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
			ab8500_version_str[ab8500->version],
			ab8500->chip_id >> 4,
			ab8500->chip_id & 0x0F);

	/* Configure AB8500 or AB9540 IRQ */
	if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
		ab8500->mask_size = AB9540_NUM_IRQ_REGS;
		ab8500->irq_reg_offset = ab9540_irq_regoffset;
	} else {
		ab8500->mask_size = AB8500_NUM_IRQ_REGS;
		ab8500->irq_reg_offset = ab8500_irq_regoffset;
	}
	ab8500->mask = kzalloc(ab8500->mask_size, GFP_KERNEL);
	if (!ab8500->mask)
		return -ENOMEM;
	ab8500->oldmask = kzalloc(ab8500->mask_size, GFP_KERNEL);
	if (!ab8500->oldmask) {
		ret = -ENOMEM;
		goto out_freemask;
	}
	/*
	 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
	 * 0x01 Swoff bit programming
	 * 0x02 Thermal protection activation
	 * 0x04 Vbat lower then BattOk falling threshold
	 * 0x08 Watchdog expired
	 * 0x10 Non presence of 32kHz clock
	 * 0x20 Battery level lower than power on reset threshold
	 * 0x40 Power on key 1 pressed longer than 10 seconds
	 * 0x80 DB8500 thermal shutdown
	 */

	ret = get_register_interruptible(ab8500, AB8500_RTC,
		AB8500_SWITCH_OFF_STATUS, &value);
	if (ret < 0)
		return ret;
	dev_info(ab8500->dev, "switch off status: %#x", value);

	if (plat && plat->init)
		plat->init(ab8500);

	/* Clear and mask all interrupts */
	for (i = 0; i < ab8500->mask_size; i++) {
		/*
		 * Interrupt register 12 doesn't exist prior to AB8500 version
		 * 2.0
		 */
		if (ab8500->irq_reg_offset[i] == 11 &&
				is_ab8500_1p1_or_earlier(ab8500))
			continue;

		get_register_interruptible(ab8500, AB8500_INTERRUPT,
			AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
			&value);
		set_register_interruptible(ab8500, AB8500_INTERRUPT,
			AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
	}

	ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
	if (ret)
		goto out_freeoldmask;

	for (i = 0; i < ab8500->mask_size; i++)
		ab8500->mask[i] = ab8500->oldmask[i] = 0xff;

	if (ab8500->irq_base) {
		ret = ab8500_irq_init(ab8500);
		if (ret)
			goto out_freeoldmask;

		/*  Activate this feature only in ab9540 */
		/*  till tests are done on ab8500 1p2 or later*/
		if (is_ab9540(ab8500))
			ret = request_threaded_irq(ab8500->irq, NULL,
					ab8500_hierarchical_irq,
					IRQF_ONESHOT | IRQF_NO_SUSPEND,
					"ab8500", ab8500);
		else
			ret = request_threaded_irq(ab8500->irq, NULL,
					ab8500_irq,
					IRQF_ONESHOT | IRQF_NO_SUSPEND,
					"ab8500", ab8500);
		if (ret)
			goto out_removeirq;
	}

	if (!np) {
		ret = mfd_add_devices(ab8500->dev, 0, abx500_common_devs,
				ARRAY_SIZE(abx500_common_devs), NULL,
				ab8500->irq_base);

		if (ret)
			goto out_freeirq;

		if (is_ab9540(ab8500))
			ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
					ARRAY_SIZE(ab9540_devs), NULL,
					ab8500->irq_base);
		else
			ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
					ARRAY_SIZE(ab8500_devs), NULL,
					ab8500->irq_base);
		if (ret)
			goto out_freeirq;

		if (is_ab9540(ab8500) || is_ab8505(ab8500))
			ret = mfd_add_devices(ab8500->dev, 0, ab9540_ab8505_devs,
					ARRAY_SIZE(ab9540_ab8505_devs), NULL,
					ab8500->irq_base);
		if (ret)
			goto out_freeirq;
	}

	if (!no_bm) {
		/* Add battery management devices */
		ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
				      ARRAY_SIZE(ab8500_bm_devs), NULL,
				      ab8500->irq_base);
		if (ret)
			dev_err(ab8500->dev, "error adding bm devices\n");
	}

	if (is_ab9540(ab8500))
		ret = sysfs_create_group(&ab8500->dev->kobj,
					&ab9540_attr_group);
	else
		ret = sysfs_create_group(&ab8500->dev->kobj,
					&ab8500_attr_group);
	if (ret)
		dev_err(ab8500->dev, "error creating sysfs entries\n");
	else
		return ret;

out_freeirq:
	if (ab8500->irq_base)
		free_irq(ab8500->irq, ab8500);
out_removeirq:
	if (ab8500->irq_base)
		ab8500_irq_remove(ab8500);
out_freeoldmask:
	kfree(ab8500->oldmask);
out_freemask:
	kfree(ab8500->mask);
out_free_ab8500:
	kfree(ab8500);

	return ret;
}

static int __devexit ab8500_remove(struct platform_device *pdev)
{
	struct ab8500 *ab8500 = platform_get_drvdata(pdev);

	if (is_ab9540(ab8500))
		sysfs_remove_group(&ab8500->dev->kobj, &ab9540_attr_group);
	else
		sysfs_remove_group(&ab8500->dev->kobj, &ab8500_attr_group);
	mfd_remove_devices(ab8500->dev);
	if (ab8500->irq_base) {
		free_irq(ab8500->irq, ab8500);
		ab8500_irq_remove(ab8500);
	}
	kfree(ab8500->oldmask);
	kfree(ab8500->mask);
	kfree(ab8500);

	return 0;
}

static const struct platform_device_id ab8500_id[] = {
	{ "ab8500-core", AB8500_VERSION_AB8500 },
	{ "ab8505-i2c", AB8500_VERSION_AB8505 },
	{ "ab9540-i2c", AB8500_VERSION_AB9540 },
	{ "ab8540-i2c", AB8500_VERSION_AB8540 },
	{ }
};

static struct platform_driver ab8500_core_driver = {
	.driver = {
		.name = "ab8500-core",
		.owner = THIS_MODULE,
		.of_match_table = ab8500_match,
	},
	.probe	= ab8500_probe,
	.remove	= __devexit_p(ab8500_remove),
	.id_table = ab8500_id,
};

static int __init ab8500_core_init(void)
{
	return platform_driver_register(&ab8500_core_driver);
}

static void __exit ab8500_core_exit(void)
{
	platform_driver_unregister(&ab8500_core_driver);
}
arch_initcall(ab8500_core_init);
module_exit(ab8500_core_exit);

MODULE_AUTHOR("Mattias Wallin, Srinidhi Kasagar, Rabin Vincent");
MODULE_DESCRIPTION("AB8500 MFD core");
MODULE_LICENSE("GPL v2");