aboutsummaryrefslogtreecommitdiff
path: root/drivers/power/abx500_chargalg.c
blob: f59bc025ca58be8a6b5fdd094331874bf9d31469 (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
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
/*
 * Copyright (C) ST-Ericsson SA 2012
 *
 * Charging algorithm driver for abx500 variants
 *
 * License Terms: GNU General Public License v2
 * Authors:
 *	Johan Palsson <johan.palsson@stericsson.com>
 *	Karl Komierowski <karl.komierowski@stericsson.com>
 *	Arun R Murthy <arun.murthy@stericsson.com>
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/completion.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/mfd/abx500/ab8500-bm.h>

/* Watchdog kick interval */
#define CHG_WD_INTERVAL			(6 * HZ)

/* End-of-charge criteria counter */
#define EOC_COND_CNT			10

#define to_abx500_chargalg_device_info(x) container_of((x), \
	struct abx500_chargalg, chargalg_psy);

enum abx500_chargers {
	NO_CHG,
	AC_CHG,
	USB_CHG,
};

struct abx500_chargalg_charger_info {
	enum abx500_chargers conn_chg;
	enum abx500_chargers prev_conn_chg;
	enum abx500_chargers online_chg;
	enum abx500_chargers prev_online_chg;
	enum abx500_chargers charger_type;
	bool usb_chg_ok;
	bool ac_chg_ok;
	int usb_volt;
	int usb_curr;
	int ac_volt;
	int ac_curr;
	int usb_vset;
	int usb_iset;
	int ac_vset;
	int ac_iset;
};

struct abx500_chargalg_suspension_status {
	bool suspended_change;
	bool ac_suspended;
	bool usb_suspended;
};

struct abx500_chargalg_battery_data {
	int temp;
	int volt;
	int avg_curr;
	int inst_curr;
	int percent;
};

enum abx500_chargalg_states {
	STATE_HANDHELD_INIT,
	STATE_HANDHELD,
	STATE_CHG_NOT_OK_INIT,
	STATE_CHG_NOT_OK,
	STATE_HW_TEMP_PROTECT_INIT,
	STATE_HW_TEMP_PROTECT,
	STATE_NORMAL_INIT,
	STATE_NORMAL,
	STATE_WAIT_FOR_RECHARGE_INIT,
	STATE_WAIT_FOR_RECHARGE,
	STATE_MAINTENANCE_A_INIT,
	STATE_MAINTENANCE_A,
	STATE_MAINTENANCE_B_INIT,
	STATE_MAINTENANCE_B,
	STATE_TEMP_UNDEROVER_INIT,
	STATE_TEMP_UNDEROVER,
	STATE_TEMP_LOWHIGH_INIT,
	STATE_TEMP_LOWHIGH,
	STATE_SUSPENDED_INIT,
	STATE_SUSPENDED,
	STATE_OVV_PROTECT_INIT,
	STATE_OVV_PROTECT,
	STATE_SAFETY_TIMER_EXPIRED_INIT,
	STATE_SAFETY_TIMER_EXPIRED,
	STATE_BATT_REMOVED_INIT,
	STATE_BATT_REMOVED,
	STATE_WD_EXPIRED_INIT,
	STATE_WD_EXPIRED,
};

static const char *states[] = {
	"HANDHELD_INIT",
	"HANDHELD",
	"CHG_NOT_OK_INIT",
	"CHG_NOT_OK",
	"HW_TEMP_PROTECT_INIT",
	"HW_TEMP_PROTECT",
	"NORMAL_INIT",
	"NORMAL",
	"WAIT_FOR_RECHARGE_INIT",
	"WAIT_FOR_RECHARGE",
	"MAINTENANCE_A_INIT",
	"MAINTENANCE_A",
	"MAINTENANCE_B_INIT",
	"MAINTENANCE_B",
	"TEMP_UNDEROVER_INIT",
	"TEMP_UNDEROVER",
	"TEMP_LOWHIGH_INIT",
	"TEMP_LOWHIGH",
	"SUSPENDED_INIT",
	"SUSPENDED",
	"OVV_PROTECT_INIT",
	"OVV_PROTECT",
	"SAFETY_TIMER_EXPIRED_INIT",
	"SAFETY_TIMER_EXPIRED",
	"BATT_REMOVED_INIT",
	"BATT_REMOVED",
	"WD_EXPIRED_INIT",
	"WD_EXPIRED",
};

struct abx500_chargalg_events {
	bool batt_unknown;
	bool mainextchnotok;
	bool batt_ovv;
	bool batt_rem;
	bool btemp_underover;
	bool btemp_lowhigh;
	bool main_thermal_prot;
	bool usb_thermal_prot;
	bool main_ovv;
	bool vbus_ovv;
	bool usbchargernotok;
	bool safety_timer_expired;
	bool maintenance_timer_expired;
	bool ac_wd_expired;
	bool usb_wd_expired;
	bool ac_cv_active;
	bool usb_cv_active;
	bool vbus_collapsed;
};

/**
 * struct abx500_charge_curr_maximization - Charger maximization parameters
 * @original_iset:	the non optimized/maximised charger current
 * @current_iset:	the charging current used at this moment
 * @test_delta_i:	the delta between the current we want to charge and the
			current that is really going into the battery
 * @condition_cnt:	number of iterations needed before a new charger current
			is set
 * @max_current:	maximum charger current
 * @wait_cnt:		to avoid too fast current step down in case of charger
 *			voltage collapse, we insert this delay between step
 *			down
 * @level:		tells in how many steps the charging current has been
			increased
 */
struct abx500_charge_curr_maximization {
	int original_iset;
	int current_iset;
	int test_delta_i;
	int condition_cnt;
	int max_current;
	int wait_cnt;
	u8 level;
};

enum maxim_ret {
	MAXIM_RET_NOACTION,
	MAXIM_RET_CHANGE,
	MAXIM_RET_IBAT_TOO_HIGH,
};

/**
 * struct abx500_chargalg - abx500 Charging algorithm device information
 * @dev:		pointer to the structure device
 * @charge_status:	battery operating status
 * @eoc_cnt:		counter used to determine end-of_charge
 * @maintenance_chg:	indicate if maintenance charge is active
 * @t_hyst_norm		temperature hysteresis when the temperature has been
 *			over or under normal limits
 * @t_hyst_lowhigh	temperature hysteresis when the temperature has been
 *			over or under the high or low limits
 * @charge_state:	current state of the charging algorithm
 * @ccm			charging current maximization parameters
 * @chg_info:		information about connected charger types
 * @batt_data:		data of the battery
 * @susp_status:	current charger suspension status
 * @bm:           	Platform specific battery management information
 * @chargalg_psy:	structure that holds the battery properties exposed by
 *			the charging algorithm
 * @events:		structure for information about events triggered
 * @chargalg_wq:		work queue for running the charging algorithm
 * @chargalg_periodic_work:	work to run the charging algorithm periodically
 * @chargalg_wd_work:		work to kick the charger watchdog periodically
 * @chargalg_work:		work to run the charging algorithm instantly
 * @safety_timer:		charging safety timer
 * @maintenance_timer:		maintenance charging timer
 * @chargalg_kobject:		structure of type kobject
 */
struct abx500_chargalg {
	struct device *dev;
	int charge_status;
	int eoc_cnt;
	bool maintenance_chg;
	int t_hyst_norm;
	int t_hyst_lowhigh;
	enum abx500_chargalg_states charge_state;
	struct abx500_charge_curr_maximization ccm;
	struct abx500_chargalg_charger_info chg_info;
	struct abx500_chargalg_battery_data batt_data;
	struct abx500_chargalg_suspension_status susp_status;
	struct abx500_bm_data *bm;
	struct power_supply chargalg_psy;
	struct ux500_charger *ac_chg;
	struct ux500_charger *usb_chg;
	struct abx500_chargalg_events events;
	struct workqueue_struct *chargalg_wq;
	struct delayed_work chargalg_periodic_work;
	struct delayed_work chargalg_wd_work;
	struct work_struct chargalg_work;
	struct timer_list safety_timer;
	struct timer_list maintenance_timer;
	struct kobject chargalg_kobject;
};

/* Main battery properties */
static enum power_supply_property abx500_chargalg_props[] = {
	POWER_SUPPLY_PROP_STATUS,
	POWER_SUPPLY_PROP_HEALTH,
};

/**
 * abx500_chargalg_safety_timer_expired() - Expiration of the safety timer
 * @data:	pointer to the abx500_chargalg structure
 *
 * This function gets called when the safety timer for the charger
 * expires
 */
static void abx500_chargalg_safety_timer_expired(unsigned long data)
{
	struct abx500_chargalg *di = (struct abx500_chargalg *) data;
	dev_err(di->dev, "Safety timer expired\n");
	di->events.safety_timer_expired = true;

	/* Trigger execution of the algorithm instantly */
	queue_work(di->chargalg_wq, &di->chargalg_work);
}

/**
 * abx500_chargalg_maintenance_timer_expired() - Expiration of
 * the maintenance timer
 * @i:		pointer to the abx500_chargalg structure
 *
 * This function gets called when the maintenence timer
 * expires
 */
static void abx500_chargalg_maintenance_timer_expired(unsigned long data)
{

	struct abx500_chargalg *di = (struct abx500_chargalg *) data;
	dev_dbg(di->dev, "Maintenance timer expired\n");
	di->events.maintenance_timer_expired = true;

	/* Trigger execution of the algorithm instantly */
	queue_work(di->chargalg_wq, &di->chargalg_work);
}

/**
 * abx500_chargalg_state_to() - Change charge state
 * @di:		pointer to the abx500_chargalg structure
 *
 * This function gets called when a charge state change should occur
 */
static void abx500_chargalg_state_to(struct abx500_chargalg *di,
	enum abx500_chargalg_states state)
{
	dev_dbg(di->dev,
		"State changed: %s (From state: [%d] %s =to=> [%d] %s )\n",
		di->charge_state == state ? "NO" : "YES",
		di->charge_state,
		states[di->charge_state],
		state,
		states[state]);

	di->charge_state = state;
}

/**
 * abx500_chargalg_check_charger_connection() - Check charger connection change
 * @di:		pointer to the abx500_chargalg structure
 *
 * This function will check if there is a change in the charger connection
 * and change charge state accordingly. AC has precedence over USB.
 */
static int abx500_chargalg_check_charger_connection(struct abx500_chargalg *di)
{
	if (di->chg_info.conn_chg != di->chg_info.prev_conn_chg ||
		di->susp_status.suspended_change) {
		/*
		 * Charger state changed or suspension
		 * has changed since last update
		 */
		if ((di->chg_info.conn_chg & AC_CHG) &&
			!di->susp_status.ac_suspended) {
			dev_dbg(di->dev, "Charging source is AC\n");
			if (di->chg_info.charger_type != AC_CHG) {
				di->chg_info.charger_type = AC_CHG;
				abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
			}
		} else if ((di->chg_info.conn_chg & USB_CHG) &&
			!di->susp_status.usb_suspended) {
			dev_dbg(di->dev, "Charging source is USB\n");
			di->chg_info.charger_type = USB_CHG;
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		} else if (di->chg_info.conn_chg &&
			(di->susp_status.ac_suspended ||
			di->susp_status.usb_suspended)) {
			dev_dbg(di->dev, "Charging is suspended\n");
			di->chg_info.charger_type = NO_CHG;
			abx500_chargalg_state_to(di, STATE_SUSPENDED_INIT);
		} else {
			dev_dbg(di->dev, "Charging source is OFF\n");
			di->chg_info.charger_type = NO_CHG;
			abx500_chargalg_state_to(di, STATE_HANDHELD_INIT);
		}
		di->chg_info.prev_conn_chg = di->chg_info.conn_chg;
		di->susp_status.suspended_change = false;
	}
	return di->chg_info.conn_chg;
}

/**
 * abx500_chargalg_start_safety_timer() - Start charging safety timer
 * @di:		pointer to the abx500_chargalg structure
 *
 * The safety timer is used to avoid overcharging of old or bad batteries.
 * There are different timers for AC and USB
 */
static void abx500_chargalg_start_safety_timer(struct abx500_chargalg *di)
{
	unsigned long timer_expiration = 0;

	switch (di->chg_info.charger_type) {
	case AC_CHG:
		timer_expiration =
		round_jiffies(jiffies +
			(di->bm->main_safety_tmr_h * 3600 * HZ));
		break;

	case USB_CHG:
		timer_expiration =
		round_jiffies(jiffies +
			(di->bm->usb_safety_tmr_h * 3600 * HZ));
		break;

	default:
		dev_err(di->dev, "Unknown charger to charge from\n");
		break;
	}

	di->events.safety_timer_expired = false;
	di->safety_timer.expires = timer_expiration;
	if (!timer_pending(&di->safety_timer))
		add_timer(&di->safety_timer);
	else
		mod_timer(&di->safety_timer, timer_expiration);
}

/**
 * abx500_chargalg_stop_safety_timer() - Stop charging safety timer
 * @di:		pointer to the abx500_chargalg structure
 *
 * The safety timer is stopped whenever the NORMAL state is exited
 */
static void abx500_chargalg_stop_safety_timer(struct abx500_chargalg *di)
{
	di->events.safety_timer_expired = false;
	del_timer(&di->safety_timer);
}

/**
 * abx500_chargalg_start_maintenance_timer() - Start charging maintenance timer
 * @di:		pointer to the abx500_chargalg structure
 * @duration:	duration of ther maintenance timer in hours
 *
 * The maintenance timer is used to maintain the charge in the battery once
 * the battery is considered full. These timers are chosen to match the
 * discharge curve of the battery
 */
static void abx500_chargalg_start_maintenance_timer(struct abx500_chargalg *di,
	int duration)
{
	unsigned long timer_expiration;

	/* Convert from hours to jiffies */
	timer_expiration = round_jiffies(jiffies + (duration * 3600 * HZ));

	di->events.maintenance_timer_expired = false;
	di->maintenance_timer.expires = timer_expiration;
	if (!timer_pending(&di->maintenance_timer))
		add_timer(&di->maintenance_timer);
	else
		mod_timer(&di->maintenance_timer, timer_expiration);
}

/**
 * abx500_chargalg_stop_maintenance_timer() - Stop maintenance timer
 * @di:		pointer to the abx500_chargalg structure
 *
 * The maintenance timer is stopped whenever maintenance ends or when another
 * state is entered
 */
static void abx500_chargalg_stop_maintenance_timer(struct abx500_chargalg *di)
{
	di->events.maintenance_timer_expired = false;
	del_timer(&di->maintenance_timer);
}

/**
 * abx500_chargalg_kick_watchdog() - Kick charger watchdog
 * @di:		pointer to the abx500_chargalg structure
 *
 * The charger watchdog have to be kicked periodically whenever the charger is
 * on, else the ABB will reset the system
 */
static int abx500_chargalg_kick_watchdog(struct abx500_chargalg *di)
{
	/* Check if charger exists and kick watchdog if charging */
	if (di->ac_chg && di->ac_chg->ops.kick_wd &&
			di->chg_info.online_chg & AC_CHG)
		return di->ac_chg->ops.kick_wd(di->ac_chg);
	else if (di->usb_chg && di->usb_chg->ops.kick_wd &&
			di->chg_info.online_chg & USB_CHG)
		return di->usb_chg->ops.kick_wd(di->usb_chg);

	return -ENXIO;
}

/**
 * abx500_chargalg_ac_en() - Turn on/off the AC charger
 * @di:		pointer to the abx500_chargalg structure
 * @enable:	charger on/off
 * @vset:	requested charger output voltage
 * @iset:	requested charger output current
 *
 * The AC charger will be turned on/off with the requested charge voltage and
 * current
 */
static int abx500_chargalg_ac_en(struct abx500_chargalg *di, int enable,
	int vset, int iset)
{
	if (!di->ac_chg || !di->ac_chg->ops.enable)
		return -ENXIO;

	/* Select maximum of what both the charger and the battery supports */
	if (di->ac_chg->max_out_volt)
		vset = min(vset, di->ac_chg->max_out_volt);
	if (di->ac_chg->max_out_curr)
		iset = min(iset, di->ac_chg->max_out_curr);

	di->chg_info.ac_iset = iset;
	di->chg_info.ac_vset = vset;

	return di->ac_chg->ops.enable(di->ac_chg, enable, vset, iset);
}

/**
 * abx500_chargalg_usb_en() - Turn on/off the USB charger
 * @di:		pointer to the abx500_chargalg structure
 * @enable:	charger on/off
 * @vset:	requested charger output voltage
 * @iset:	requested charger output current
 *
 * The USB charger will be turned on/off with the requested charge voltage and
 * current
 */
static int abx500_chargalg_usb_en(struct abx500_chargalg *di, int enable,
	int vset, int iset)
{
	if (!di->usb_chg || !di->usb_chg->ops.enable)
		return -ENXIO;

	/* Select maximum of what both the charger and the battery supports */
	if (di->usb_chg->max_out_volt)
		vset = min(vset, di->usb_chg->max_out_volt);
	if (di->usb_chg->max_out_curr)
		iset = min(iset, di->usb_chg->max_out_curr);

	di->chg_info.usb_iset = iset;
	di->chg_info.usb_vset = vset;

	return di->usb_chg->ops.enable(di->usb_chg, enable, vset, iset);
}

/**
 * abx500_chargalg_update_chg_curr() - Update charger current
 * @di:		pointer to the abx500_chargalg structure
 * @iset:	requested charger output current
 *
 * The charger output current will be updated for the charger
 * that is currently in use
 */
static int abx500_chargalg_update_chg_curr(struct abx500_chargalg *di,
		int iset)
{
	/* Check if charger exists and update current if charging */
	if (di->ac_chg && di->ac_chg->ops.update_curr &&
			di->chg_info.charger_type & AC_CHG) {
		/*
		 * Select maximum of what both the charger
		 * and the battery supports
		 */
		if (di->ac_chg->max_out_curr)
			iset = min(iset, di->ac_chg->max_out_curr);

		di->chg_info.ac_iset = iset;

		return di->ac_chg->ops.update_curr(di->ac_chg, iset);
	} else if (di->usb_chg && di->usb_chg->ops.update_curr &&
			di->chg_info.charger_type & USB_CHG) {
		/*
		 * Select maximum of what both the charger
		 * and the battery supports
		 */
		if (di->usb_chg->max_out_curr)
			iset = min(iset, di->usb_chg->max_out_curr);

		di->chg_info.usb_iset = iset;

		return di->usb_chg->ops.update_curr(di->usb_chg, iset);
	}

	return -ENXIO;
}

/**
 * abx500_chargalg_stop_charging() - Stop charging
 * @di:		pointer to the abx500_chargalg structure
 *
 * This function is called from any state where charging should be stopped.
 * All charging is disabled and all status parameters and timers are changed
 * accordingly
 */
static void abx500_chargalg_stop_charging(struct abx500_chargalg *di)
{
	abx500_chargalg_ac_en(di, false, 0, 0);
	abx500_chargalg_usb_en(di, false, 0, 0);
	abx500_chargalg_stop_safety_timer(di);
	abx500_chargalg_stop_maintenance_timer(di);
	di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
	di->maintenance_chg = false;
	cancel_delayed_work(&di->chargalg_wd_work);
	power_supply_changed(&di->chargalg_psy);
}

/**
 * abx500_chargalg_hold_charging() - Pauses charging
 * @di:		pointer to the abx500_chargalg structure
 *
 * This function is called in the case where maintenance charging has been
 * disabled and instead a battery voltage mode is entered to check when the
 * battery voltage has reached a certain recharge voltage
 */
static void abx500_chargalg_hold_charging(struct abx500_chargalg *di)
{
	abx500_chargalg_ac_en(di, false, 0, 0);
	abx500_chargalg_usb_en(di, false, 0, 0);
	abx500_chargalg_stop_safety_timer(di);
	abx500_chargalg_stop_maintenance_timer(di);
	di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
	di->maintenance_chg = false;
	cancel_delayed_work(&di->chargalg_wd_work);
	power_supply_changed(&di->chargalg_psy);
}

/**
 * abx500_chargalg_start_charging() - Start the charger
 * @di:		pointer to the abx500_chargalg structure
 * @vset:	requested charger output voltage
 * @iset:	requested charger output current
 *
 * A charger will be enabled depending on the requested charger type that was
 * detected previously.
 */
static void abx500_chargalg_start_charging(struct abx500_chargalg *di,
	int vset, int iset)
{
	bool start_chargalg_wd = true;

	switch (di->chg_info.charger_type) {
	case AC_CHG:
		dev_dbg(di->dev,
			"AC parameters: Vset %d, Ich %d\n", vset, iset);
		abx500_chargalg_usb_en(di, false, 0, 0);
		abx500_chargalg_ac_en(di, true, vset, iset);
		break;

	case USB_CHG:
		dev_dbg(di->dev,
			"USB parameters: Vset %d, Ich %d\n", vset, iset);
		abx500_chargalg_ac_en(di, false, 0, 0);
		abx500_chargalg_usb_en(di, true, vset, iset);
		break;

	default:
		dev_err(di->dev, "Unknown charger to charge from\n");
		start_chargalg_wd = false;
		break;
	}

	if (start_chargalg_wd && !delayed_work_pending(&di->chargalg_wd_work))
		queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0);
}

/**
 * abx500_chargalg_check_temp() - Check battery temperature ranges
 * @di:		pointer to the abx500_chargalg structure
 *
 * The battery temperature is checked against the predefined limits and the
 * charge state is changed accordingly
 */
static void abx500_chargalg_check_temp(struct abx500_chargalg *di)
{
	if (di->batt_data.temp > (di->bm->temp_low + di->t_hyst_norm) &&
		di->batt_data.temp < (di->bm->temp_high - di->t_hyst_norm)) {
		/* Temp OK! */
		di->events.btemp_underover = false;
		di->events.btemp_lowhigh = false;
		di->t_hyst_norm = 0;
		di->t_hyst_lowhigh = 0;
	} else {
		if (((di->batt_data.temp >= di->bm->temp_high) &&
			(di->batt_data.temp <
				(di->bm->temp_over - di->t_hyst_lowhigh))) ||
			((di->batt_data.temp >
				(di->bm->temp_under + di->t_hyst_lowhigh)) &&
			(di->batt_data.temp <= di->bm->temp_low))) {
			/* TEMP minor!!!!! */
			di->events.btemp_underover = false;
			di->events.btemp_lowhigh = true;
			di->t_hyst_norm = di->bm->temp_hysteresis;
			di->t_hyst_lowhigh = 0;
		} else if (di->batt_data.temp <= di->bm->temp_under ||
			di->batt_data.temp >= di->bm->temp_over) {
			/* TEMP major!!!!! */
			di->events.btemp_underover = true;
			di->events.btemp_lowhigh = false;
			di->t_hyst_norm = 0;
			di->t_hyst_lowhigh = di->bm->temp_hysteresis;
		} else {
		/* Within hysteresis */
		dev_dbg(di->dev, "Within hysteresis limit temp: %d "
				"hyst_lowhigh %d, hyst normal %d\n",
				di->batt_data.temp, di->t_hyst_lowhigh,
				di->t_hyst_norm);
		}
	}
}

/**
 * abx500_chargalg_check_charger_voltage() - Check charger voltage
 * @di:		pointer to the abx500_chargalg structure
 *
 * Charger voltage is checked against maximum limit
 */
static void abx500_chargalg_check_charger_voltage(struct abx500_chargalg *di)
{
	if (di->chg_info.usb_volt > di->bm->chg_params->usb_volt_max)
		di->chg_info.usb_chg_ok = false;
	else
		di->chg_info.usb_chg_ok = true;

	if (di->chg_info.ac_volt > di->bm->chg_params->ac_volt_max)
		di->chg_info.ac_chg_ok = false;
	else
		di->chg_info.ac_chg_ok = true;

}

/**
 * abx500_chargalg_end_of_charge() - Check if end-of-charge criteria is fulfilled
 * @di:		pointer to the abx500_chargalg structure
 *
 * End-of-charge criteria is fulfilled when the battery voltage is above a
 * certain limit and the battery current is below a certain limit for a
 * predefined number of consecutive seconds. If true, the battery is full
 */
static void abx500_chargalg_end_of_charge(struct abx500_chargalg *di)
{
	if (di->charge_status == POWER_SUPPLY_STATUS_CHARGING &&
		di->charge_state == STATE_NORMAL &&
		!di->maintenance_chg && (di->batt_data.volt >=
		di->bm->bat_type[di->bm->batt_id].termination_vol ||
		di->events.usb_cv_active || di->events.ac_cv_active) &&
		di->batt_data.avg_curr <
		di->bm->bat_type[di->bm->batt_id].termination_curr &&
		di->batt_data.avg_curr > 0) {
		if (++di->eoc_cnt >= EOC_COND_CNT) {
			di->eoc_cnt = 0;
			di->charge_status = POWER_SUPPLY_STATUS_FULL;
			di->maintenance_chg = true;
			dev_dbg(di->dev, "EOC reached!\n");
			power_supply_changed(&di->chargalg_psy);
		} else {
			dev_dbg(di->dev,
				" EOC limit reached for the %d"
				" time, out of %d before EOC\n",
				di->eoc_cnt,
				EOC_COND_CNT);
		}
	} else {
		di->eoc_cnt = 0;
	}
}

static void init_maxim_chg_curr(struct abx500_chargalg *di)
{
	di->ccm.original_iset =
		di->bm->bat_type[di->bm->batt_id].normal_cur_lvl;
	di->ccm.current_iset =
		di->bm->bat_type[di->bm->batt_id].normal_cur_lvl;
	di->ccm.test_delta_i = di->bm->maxi->charger_curr_step;
	di->ccm.max_current = di->bm->maxi->chg_curr;
	di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
	di->ccm.level = 0;
}

/**
 * abx500_chargalg_chg_curr_maxim - increases the charger current to
 *			compensate for the system load
 * @di		pointer to the abx500_chargalg structure
 *
 * This maximization function is used to raise the charger current to get the
 * battery current as close to the optimal value as possible. The battery
 * current during charging is affected by the system load
 */
static enum maxim_ret abx500_chargalg_chg_curr_maxim(struct abx500_chargalg *di)
{
	int delta_i;

	if (!di->bm->maxi->ena_maxi)
		return MAXIM_RET_NOACTION;

	delta_i = di->ccm.original_iset - di->batt_data.inst_curr;

	if (di->events.vbus_collapsed) {
		dev_dbg(di->dev, "Charger voltage has collapsed %d\n",
				di->ccm.wait_cnt);
		if (di->ccm.wait_cnt == 0) {
			dev_dbg(di->dev, "lowering current\n");
			di->ccm.wait_cnt++;
			di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
			di->ccm.max_current =
				di->ccm.current_iset - di->ccm.test_delta_i;
			di->ccm.current_iset = di->ccm.max_current;
			di->ccm.level--;
			return MAXIM_RET_CHANGE;
		} else {
			dev_dbg(di->dev, "waiting\n");
			/* Let's go in here twice before lowering curr again */
			di->ccm.wait_cnt = (di->ccm.wait_cnt + 1) % 3;
			return MAXIM_RET_NOACTION;
		}
	}

	di->ccm.wait_cnt = 0;

	if ((di->batt_data.inst_curr > di->ccm.original_iset)) {
		dev_dbg(di->dev, " Maximization Ibat (%dmA) too high"
			" (limit %dmA) (current iset: %dmA)!\n",
			di->batt_data.inst_curr, di->ccm.original_iset,
			di->ccm.current_iset);

		if (di->ccm.current_iset == di->ccm.original_iset)
			return MAXIM_RET_NOACTION;

		di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
		di->ccm.current_iset = di->ccm.original_iset;
		di->ccm.level = 0;

		return MAXIM_RET_IBAT_TOO_HIGH;
	}

	if (delta_i > di->ccm.test_delta_i &&
		(di->ccm.current_iset + di->ccm.test_delta_i) <
		di->ccm.max_current) {
		if (di->ccm.condition_cnt-- == 0) {
			/* Increse the iset with cco.test_delta_i */
			di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
			di->ccm.current_iset += di->ccm.test_delta_i;
			di->ccm.level++;
			dev_dbg(di->dev, " Maximization needed, increase"
				" with %d mA to %dmA (Optimal ibat: %d)"
				" Level %d\n",
				di->ccm.test_delta_i,
				di->ccm.current_iset,
				di->ccm.original_iset,
				di->ccm.level);
			return MAXIM_RET_CHANGE;
		} else {
			return MAXIM_RET_NOACTION;
		}
	}  else {
		di->ccm.condition_cnt = di->bm->maxi->wait_cycles;
		return MAXIM_RET_NOACTION;
	}
}

static void handle_maxim_chg_curr(struct abx500_chargalg *di)
{
	enum maxim_ret ret;
	int result;

	ret = abx500_chargalg_chg_curr_maxim(di);
	switch (ret) {
	case MAXIM_RET_CHANGE:
		result = abx500_chargalg_update_chg_curr(di,
			di->ccm.current_iset);
		if (result)
			dev_err(di->dev, "failed to set chg curr\n");
		break;
	case MAXIM_RET_IBAT_TOO_HIGH:
		result = abx500_chargalg_update_chg_curr(di,
			di->bm->bat_type[di->bm->batt_id].normal_cur_lvl);
		if (result)
			dev_err(di->dev, "failed to set chg curr\n");
		break;

	case MAXIM_RET_NOACTION:
	default:
		/* Do nothing..*/
		break;
	}
}

static int abx500_chargalg_get_ext_psy_data(struct device *dev, void *data)
{
	struct power_supply *psy;
	struct power_supply *ext;
	struct abx500_chargalg *di;
	union power_supply_propval ret;
	int i, j;
	bool psy_found = false;
	bool capacity_updated = false;

	psy = (struct power_supply *)data;
	ext = dev_get_drvdata(dev);
	di = to_abx500_chargalg_device_info(psy);
	/* For all psy where the driver name appears in any supplied_to */
	for (i = 0; i < ext->num_supplicants; i++) {
		if (!strcmp(ext->supplied_to[i], psy->name))
			psy_found = true;
	}
	if (!psy_found)
		return 0;

	/*
	 *  If external is not registering 'POWER_SUPPLY_PROP_CAPACITY' to its
	 * property because of handling that sysfs entry on its own, this is
	 * the place to get the battery capacity.
	 */
	if (!ext->get_property(ext, POWER_SUPPLY_PROP_CAPACITY, &ret)) {
		di->batt_data.percent = ret.intval;
		capacity_updated = true;
	}

	/* Go through all properties for the psy */
	for (j = 0; j < ext->num_properties; j++) {
		enum power_supply_property prop;
		prop = ext->properties[j];

		/* Initialize chargers if not already done */
		if (!di->ac_chg &&
			ext->type == POWER_SUPPLY_TYPE_MAINS)
			di->ac_chg = psy_to_ux500_charger(ext);
		else if (!di->usb_chg &&
			ext->type == POWER_SUPPLY_TYPE_USB)
			di->usb_chg = psy_to_ux500_charger(ext);

		if (ext->get_property(ext, prop, &ret))
			continue;
		switch (prop) {
		case POWER_SUPPLY_PROP_PRESENT:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				/* Battery present */
				if (ret.intval)
					di->events.batt_rem = false;
				/* Battery removed */
				else
					di->events.batt_rem = true;
				break;
			case POWER_SUPPLY_TYPE_MAINS:
				/* AC disconnected */
				if (!ret.intval &&
					(di->chg_info.conn_chg & AC_CHG)) {
					di->chg_info.prev_conn_chg =
						di->chg_info.conn_chg;
					di->chg_info.conn_chg &= ~AC_CHG;
				}
				/* AC connected */
				else if (ret.intval &&
					!(di->chg_info.conn_chg & AC_CHG)) {
					di->chg_info.prev_conn_chg =
						di->chg_info.conn_chg;
					di->chg_info.conn_chg |= AC_CHG;
				}
				break;
			case POWER_SUPPLY_TYPE_USB:
				/* USB disconnected */
				if (!ret.intval &&
					(di->chg_info.conn_chg & USB_CHG)) {
					di->chg_info.prev_conn_chg =
						di->chg_info.conn_chg;
					di->chg_info.conn_chg &= ~USB_CHG;
				}
				/* USB connected */
				else if (ret.intval &&
					!(di->chg_info.conn_chg & USB_CHG)) {
					di->chg_info.prev_conn_chg =
						di->chg_info.conn_chg;
					di->chg_info.conn_chg |= USB_CHG;
				}
				break;
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_ONLINE:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				break;
			case POWER_SUPPLY_TYPE_MAINS:
				/* AC offline */
				if (!ret.intval &&
					(di->chg_info.online_chg & AC_CHG)) {
					di->chg_info.prev_online_chg =
						di->chg_info.online_chg;
					di->chg_info.online_chg &= ~AC_CHG;
				}
				/* AC online */
				else if (ret.intval &&
					!(di->chg_info.online_chg & AC_CHG)) {
					di->chg_info.prev_online_chg =
						di->chg_info.online_chg;
					di->chg_info.online_chg |= AC_CHG;
					queue_delayed_work(di->chargalg_wq,
						&di->chargalg_wd_work, 0);
				}
				break;
			case POWER_SUPPLY_TYPE_USB:
				/* USB offline */
				if (!ret.intval &&
					(di->chg_info.online_chg & USB_CHG)) {
					di->chg_info.prev_online_chg =
						di->chg_info.online_chg;
					di->chg_info.online_chg &= ~USB_CHG;
				}
				/* USB online */
				else if (ret.intval &&
					!(di->chg_info.online_chg & USB_CHG)) {
					di->chg_info.prev_online_chg =
						di->chg_info.online_chg;
					di->chg_info.online_chg |= USB_CHG;
					queue_delayed_work(di->chargalg_wq,
						&di->chargalg_wd_work, 0);
				}
				break;
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_HEALTH:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				break;
			case POWER_SUPPLY_TYPE_MAINS:
				switch (ret.intval) {
				case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
					di->events.mainextchnotok = true;
					di->events.main_thermal_prot = false;
					di->events.main_ovv = false;
					di->events.ac_wd_expired = false;
					break;
				case POWER_SUPPLY_HEALTH_DEAD:
					di->events.ac_wd_expired = true;
					di->events.mainextchnotok = false;
					di->events.main_ovv = false;
					di->events.main_thermal_prot = false;
					break;
				case POWER_SUPPLY_HEALTH_COLD:
				case POWER_SUPPLY_HEALTH_OVERHEAT:
					di->events.main_thermal_prot = true;
					di->events.mainextchnotok = false;
					di->events.main_ovv = false;
					di->events.ac_wd_expired = false;
					break;
				case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
					di->events.main_ovv = true;
					di->events.mainextchnotok = false;
					di->events.main_thermal_prot = false;
					di->events.ac_wd_expired = false;
					break;
				case POWER_SUPPLY_HEALTH_GOOD:
					di->events.main_thermal_prot = false;
					di->events.mainextchnotok = false;
					di->events.main_ovv = false;
					di->events.ac_wd_expired = false;
					break;
				default:
					break;
				}
				break;

			case POWER_SUPPLY_TYPE_USB:
				switch (ret.intval) {
				case POWER_SUPPLY_HEALTH_UNSPEC_FAILURE:
					di->events.usbchargernotok = true;
					di->events.usb_thermal_prot = false;
					di->events.vbus_ovv = false;
					di->events.usb_wd_expired = false;
					break;
				case POWER_SUPPLY_HEALTH_DEAD:
					di->events.usb_wd_expired = true;
					di->events.usbchargernotok = false;
					di->events.usb_thermal_prot = false;
					di->events.vbus_ovv = false;
					break;
				case POWER_SUPPLY_HEALTH_COLD:
				case POWER_SUPPLY_HEALTH_OVERHEAT:
					di->events.usb_thermal_prot = true;
					di->events.usbchargernotok = false;
					di->events.vbus_ovv = false;
					di->events.usb_wd_expired = false;
					break;
				case POWER_SUPPLY_HEALTH_OVERVOLTAGE:
					di->events.vbus_ovv = true;
					di->events.usbchargernotok = false;
					di->events.usb_thermal_prot = false;
					di->events.usb_wd_expired = false;
					break;
				case POWER_SUPPLY_HEALTH_GOOD:
					di->events.usbchargernotok = false;
					di->events.usb_thermal_prot = false;
					di->events.vbus_ovv = false;
					di->events.usb_wd_expired = false;
					break;
				default:
					break;
				}
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_VOLTAGE_NOW:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				di->batt_data.volt = ret.intval / 1000;
				break;
			case POWER_SUPPLY_TYPE_MAINS:
				di->chg_info.ac_volt = ret.intval / 1000;
				break;
			case POWER_SUPPLY_TYPE_USB:
				di->chg_info.usb_volt = ret.intval / 1000;
				break;
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_VOLTAGE_AVG:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_MAINS:
				/* AVG is used to indicate when we are
				 * in CV mode */
				if (ret.intval)
					di->events.ac_cv_active = true;
				else
					di->events.ac_cv_active = false;

				break;
			case POWER_SUPPLY_TYPE_USB:
				/* AVG is used to indicate when we are
				 * in CV mode */
				if (ret.intval)
					di->events.usb_cv_active = true;
				else
					di->events.usb_cv_active = false;

				break;
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_TECHNOLOGY:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				if (ret.intval)
					di->events.batt_unknown = false;
				else
					di->events.batt_unknown = true;

				break;
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_TEMP:
			di->batt_data.temp = ret.intval / 10;
			break;

		case POWER_SUPPLY_PROP_CURRENT_NOW:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_MAINS:
					di->chg_info.ac_curr =
						ret.intval / 1000;
					break;
			case POWER_SUPPLY_TYPE_USB:
					di->chg_info.usb_curr =
						ret.intval / 1000;
				break;
			case POWER_SUPPLY_TYPE_BATTERY:
				di->batt_data.inst_curr = ret.intval / 1000;
				break;
			default:
				break;
			}
			break;

		case POWER_SUPPLY_PROP_CURRENT_AVG:
			switch (ext->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				di->batt_data.avg_curr = ret.intval / 1000;
				break;
			case POWER_SUPPLY_TYPE_USB:
				if (ret.intval)
					di->events.vbus_collapsed = true;
				else
					di->events.vbus_collapsed = false;
				break;
			default:
				break;
			}
			break;
		case POWER_SUPPLY_PROP_CAPACITY:
			if (!capacity_updated)
				di->batt_data.percent = ret.intval;
			break;
		default:
			break;
		}
	}
	return 0;
}

/**
 * abx500_chargalg_external_power_changed() - callback for power supply changes
 * @psy:       pointer to the structure power_supply
 *
 * This function is the entry point of the pointer external_power_changed
 * of the structure power_supply.
 * This function gets executed when there is a change in any external power
 * supply that this driver needs to be notified of.
 */
static void abx500_chargalg_external_power_changed(struct power_supply *psy)
{
	struct abx500_chargalg *di = to_abx500_chargalg_device_info(psy);

	/*
	 * Trigger execution of the algorithm instantly and read
	 * all power_supply properties there instead
	 */
	queue_work(di->chargalg_wq, &di->chargalg_work);
}

/**
 * abx500_chargalg_algorithm() - Main function for the algorithm
 * @di:		pointer to the abx500_chargalg structure
 *
 * This is the main control function for the charging algorithm.
 * It is called periodically or when something happens that will
 * trigger a state change
 */
static void abx500_chargalg_algorithm(struct abx500_chargalg *di)
{
	int charger_status;

	/* Collect data from all power_supply class devices */
	class_for_each_device(power_supply_class, NULL,
		&di->chargalg_psy, abx500_chargalg_get_ext_psy_data);

	abx500_chargalg_end_of_charge(di);
	abx500_chargalg_check_temp(di);
	abx500_chargalg_check_charger_voltage(di);

	charger_status = abx500_chargalg_check_charger_connection(di);
	/*
	 * First check if we have a charger connected.
	 * Also we don't allow charging of unknown batteries if configured
	 * this way
	 */
	if (!charger_status ||
		(di->events.batt_unknown && !di->bm->chg_unknown_bat)) {
		if (di->charge_state != STATE_HANDHELD) {
			di->events.safety_timer_expired = false;
			abx500_chargalg_state_to(di, STATE_HANDHELD_INIT);
		}
	}

	/* If suspended, we should not continue checking the flags */
	else if (di->charge_state == STATE_SUSPENDED_INIT ||
		di->charge_state == STATE_SUSPENDED) {
		/* We don't do anything here, just don,t continue */
	}

	/* Safety timer expiration */
	else if (di->events.safety_timer_expired) {
		if (di->charge_state != STATE_SAFETY_TIMER_EXPIRED)
			abx500_chargalg_state_to(di,
				STATE_SAFETY_TIMER_EXPIRED_INIT);
	}
	/*
	 * Check if any interrupts has occured
	 * that will prevent us from charging
	 */

	/* Battery removed */
	else if (di->events.batt_rem) {
		if (di->charge_state != STATE_BATT_REMOVED)
			abx500_chargalg_state_to(di, STATE_BATT_REMOVED_INIT);
	}
	/* Main or USB charger not ok. */
	else if (di->events.mainextchnotok || di->events.usbchargernotok) {
		/*
		 * If vbus_collapsed is set, we have to lower the charger
		 * current, which is done in the normal state below
		 */
		if (di->charge_state != STATE_CHG_NOT_OK &&
				!di->events.vbus_collapsed)
			abx500_chargalg_state_to(di, STATE_CHG_NOT_OK_INIT);
	}
	/* VBUS, Main or VBAT OVV. */
	else if (di->events.vbus_ovv ||
			di->events.main_ovv ||
			di->events.batt_ovv ||
			!di->chg_info.usb_chg_ok ||
			!di->chg_info.ac_chg_ok) {
		if (di->charge_state != STATE_OVV_PROTECT)
			abx500_chargalg_state_to(di, STATE_OVV_PROTECT_INIT);
	}
	/* USB Thermal, stop charging */
	else if (di->events.main_thermal_prot ||
		di->events.usb_thermal_prot) {
		if (di->charge_state != STATE_HW_TEMP_PROTECT)
			abx500_chargalg_state_to(di,
				STATE_HW_TEMP_PROTECT_INIT);
	}
	/* Battery temp over/under */
	else if (di->events.btemp_underover) {
		if (di->charge_state != STATE_TEMP_UNDEROVER)
			abx500_chargalg_state_to(di,
				STATE_TEMP_UNDEROVER_INIT);
	}
	/* Watchdog expired */
	else if (di->events.ac_wd_expired ||
		di->events.usb_wd_expired) {
		if (di->charge_state != STATE_WD_EXPIRED)
			abx500_chargalg_state_to(di, STATE_WD_EXPIRED_INIT);
	}
	/* Battery temp high/low */
	else if (di->events.btemp_lowhigh) {
		if (di->charge_state != STATE_TEMP_LOWHIGH)
			abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH_INIT);
	}

	dev_dbg(di->dev,
		"[CHARGALG] Vb %d Ib_avg %d Ib_inst %d Tb %d Cap %d Maint %d "
		"State %s Active_chg %d Chg_status %d AC %d USB %d "
		"AC_online %d USB_online %d AC_CV %d USB_CV %d AC_I %d "
		"USB_I %d AC_Vset %d AC_Iset %d USB_Vset %d USB_Iset %d\n",
		di->batt_data.volt,
		di->batt_data.avg_curr,
		di->batt_data.inst_curr,
		di->batt_data.temp,
		di->batt_data.percent,
		di->maintenance_chg,
		states[di->charge_state],
		di->chg_info.charger_type,
		di->charge_status,
		di->chg_info.conn_chg & AC_CHG,
		di->chg_info.conn_chg & USB_CHG,
		di->chg_info.online_chg & AC_CHG,
		di->chg_info.online_chg & USB_CHG,
		di->events.ac_cv_active,
		di->events.usb_cv_active,
		di->chg_info.ac_curr,
		di->chg_info.usb_curr,
		di->chg_info.ac_vset,
		di->chg_info.ac_iset,
		di->chg_info.usb_vset,
		di->chg_info.usb_iset);

	switch (di->charge_state) {
	case STATE_HANDHELD_INIT:
		abx500_chargalg_stop_charging(di);
		di->charge_status = POWER_SUPPLY_STATUS_DISCHARGING;
		abx500_chargalg_state_to(di, STATE_HANDHELD);
		/* Intentional fallthrough */

	case STATE_HANDHELD:
		break;

	case STATE_SUSPENDED_INIT:
		if (di->susp_status.ac_suspended)
			abx500_chargalg_ac_en(di, false, 0, 0);
		if (di->susp_status.usb_suspended)
			abx500_chargalg_usb_en(di, false, 0, 0);
		abx500_chargalg_stop_safety_timer(di);
		abx500_chargalg_stop_maintenance_timer(di);
		di->charge_status = POWER_SUPPLY_STATUS_NOT_CHARGING;
		di->maintenance_chg = false;
		abx500_chargalg_state_to(di, STATE_SUSPENDED);
		power_supply_changed(&di->chargalg_psy);
		/* Intentional fallthrough */

	case STATE_SUSPENDED:
		/* CHARGING is suspended */
		break;

	case STATE_BATT_REMOVED_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_BATT_REMOVED);
		/* Intentional fallthrough */

	case STATE_BATT_REMOVED:
		if (!di->events.batt_rem)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_HW_TEMP_PROTECT_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_HW_TEMP_PROTECT);
		/* Intentional fallthrough */

	case STATE_HW_TEMP_PROTECT:
		if (!di->events.main_thermal_prot &&
				!di->events.usb_thermal_prot)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_OVV_PROTECT_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_OVV_PROTECT);
		/* Intentional fallthrough */

	case STATE_OVV_PROTECT:
		if (!di->events.vbus_ovv &&
				!di->events.main_ovv &&
				!di->events.batt_ovv &&
				di->chg_info.usb_chg_ok &&
				di->chg_info.ac_chg_ok)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_CHG_NOT_OK_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_CHG_NOT_OK);
		/* Intentional fallthrough */

	case STATE_CHG_NOT_OK:
		if (!di->events.mainextchnotok &&
				!di->events.usbchargernotok)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_SAFETY_TIMER_EXPIRED_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_SAFETY_TIMER_EXPIRED);
		/* Intentional fallthrough */

	case STATE_SAFETY_TIMER_EXPIRED:
		/* We exit this state when charger is removed */
		break;

	case STATE_NORMAL_INIT:
		abx500_chargalg_start_charging(di,
			di->bm->bat_type[di->bm->batt_id].normal_vol_lvl,
			di->bm->bat_type[di->bm->batt_id].normal_cur_lvl);
		abx500_chargalg_state_to(di, STATE_NORMAL);
		abx500_chargalg_start_safety_timer(di);
		abx500_chargalg_stop_maintenance_timer(di);
		init_maxim_chg_curr(di);
		di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
		di->eoc_cnt = 0;
		di->maintenance_chg = false;
		power_supply_changed(&di->chargalg_psy);

		break;

	case STATE_NORMAL:
		handle_maxim_chg_curr(di);
		if (di->charge_status == POWER_SUPPLY_STATUS_FULL &&
			di->maintenance_chg) {
			if (di->bm->no_maintenance)
				abx500_chargalg_state_to(di,
					STATE_WAIT_FOR_RECHARGE_INIT);
			else
				abx500_chargalg_state_to(di,
					STATE_MAINTENANCE_A_INIT);
		}
		break;

	/* This state will be used when the maintenance state is disabled */
	case STATE_WAIT_FOR_RECHARGE_INIT:
		abx500_chargalg_hold_charging(di);
		abx500_chargalg_state_to(di, STATE_WAIT_FOR_RECHARGE);
		/* Intentional fallthrough */

	case STATE_WAIT_FOR_RECHARGE:
		if (di->batt_data.percent <=
		    di->bm->bat_type[di->bm->batt_id].
		    recharge_cap)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_MAINTENANCE_A_INIT:
		abx500_chargalg_stop_safety_timer(di);
		abx500_chargalg_start_maintenance_timer(di,
			di->bm->bat_type[
				di->bm->batt_id].maint_a_chg_timer_h);
		abx500_chargalg_start_charging(di,
			di->bm->bat_type[
				di->bm->batt_id].maint_a_vol_lvl,
			di->bm->bat_type[
				di->bm->batt_id].maint_a_cur_lvl);
		abx500_chargalg_state_to(di, STATE_MAINTENANCE_A);
		power_supply_changed(&di->chargalg_psy);
		/* Intentional fallthrough*/

	case STATE_MAINTENANCE_A:
		if (di->events.maintenance_timer_expired) {
			abx500_chargalg_stop_maintenance_timer(di);
			abx500_chargalg_state_to(di, STATE_MAINTENANCE_B_INIT);
		}
		break;

	case STATE_MAINTENANCE_B_INIT:
		abx500_chargalg_start_maintenance_timer(di,
			di->bm->bat_type[
				di->bm->batt_id].maint_b_chg_timer_h);
		abx500_chargalg_start_charging(di,
			di->bm->bat_type[
				di->bm->batt_id].maint_b_vol_lvl,
			di->bm->bat_type[
				di->bm->batt_id].maint_b_cur_lvl);
		abx500_chargalg_state_to(di, STATE_MAINTENANCE_B);
		power_supply_changed(&di->chargalg_psy);
		/* Intentional fallthrough*/

	case STATE_MAINTENANCE_B:
		if (di->events.maintenance_timer_expired) {
			abx500_chargalg_stop_maintenance_timer(di);
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		}
		break;

	case STATE_TEMP_LOWHIGH_INIT:
		abx500_chargalg_start_charging(di,
			di->bm->bat_type[
				di->bm->batt_id].low_high_vol_lvl,
			di->bm->bat_type[
				di->bm->batt_id].low_high_cur_lvl);
		abx500_chargalg_stop_maintenance_timer(di);
		di->charge_status = POWER_SUPPLY_STATUS_CHARGING;
		abx500_chargalg_state_to(di, STATE_TEMP_LOWHIGH);
		power_supply_changed(&di->chargalg_psy);
		/* Intentional fallthrough */

	case STATE_TEMP_LOWHIGH:
		if (!di->events.btemp_lowhigh)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_WD_EXPIRED_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_WD_EXPIRED);
		/* Intentional fallthrough */

	case STATE_WD_EXPIRED:
		if (!di->events.ac_wd_expired &&
				!di->events.usb_wd_expired)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;

	case STATE_TEMP_UNDEROVER_INIT:
		abx500_chargalg_stop_charging(di);
		abx500_chargalg_state_to(di, STATE_TEMP_UNDEROVER);
		/* Intentional fallthrough */

	case STATE_TEMP_UNDEROVER:
		if (!di->events.btemp_underover)
			abx500_chargalg_state_to(di, STATE_NORMAL_INIT);
		break;
	}

	/* Start charging directly if the new state is a charge state */
	if (di->charge_state == STATE_NORMAL_INIT ||
			di->charge_state == STATE_MAINTENANCE_A_INIT ||
			di->charge_state == STATE_MAINTENANCE_B_INIT)
		queue_work(di->chargalg_wq, &di->chargalg_work);
}

/**
 * abx500_chargalg_periodic_work() - Periodic work for the algorithm
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for the charging algorithm
 */
static void abx500_chargalg_periodic_work(struct work_struct *work)
{
	struct abx500_chargalg *di = container_of(work,
		struct abx500_chargalg, chargalg_periodic_work.work);

	abx500_chargalg_algorithm(di);

	/*
	 * If a charger is connected then the battery has to be monitored
	 * frequently, else the work can be delayed.
	 */
	if (di->chg_info.conn_chg)
		queue_delayed_work(di->chargalg_wq,
			&di->chargalg_periodic_work,
			di->bm->interval_charging * HZ);
	else
		queue_delayed_work(di->chargalg_wq,
			&di->chargalg_periodic_work,
			di->bm->interval_not_charging * HZ);
}

/**
 * abx500_chargalg_wd_work() - periodic work to kick the charger watchdog
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for kicking the charger watchdog
 */
static void abx500_chargalg_wd_work(struct work_struct *work)
{
	int ret;
	struct abx500_chargalg *di = container_of(work,
		struct abx500_chargalg, chargalg_wd_work.work);

	dev_dbg(di->dev, "abx500_chargalg_wd_work\n");

	ret = abx500_chargalg_kick_watchdog(di);
	if (ret < 0)
		dev_err(di->dev, "failed to kick watchdog\n");

	queue_delayed_work(di->chargalg_wq,
		&di->chargalg_wd_work, CHG_WD_INTERVAL);
}

/**
 * abx500_chargalg_work() - Work to run the charging algorithm instantly
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for calling the charging algorithm
 */
static void abx500_chargalg_work(struct work_struct *work)
{
	struct abx500_chargalg *di = container_of(work,
		struct abx500_chargalg, chargalg_work);

	abx500_chargalg_algorithm(di);
}

/**
 * abx500_chargalg_get_property() - get the chargalg properties
 * @psy:	pointer to the power_supply structure
 * @psp:	pointer to the power_supply_property structure
 * @val:	pointer to the power_supply_propval union
 *
 * This function gets called when an application tries to get the
 * chargalg properties by reading the sysfs files.
 * status:     charging/discharging/full/unknown
 * health:     health of the battery
 * Returns error code in case of failure else 0 on success
 */
static int abx500_chargalg_get_property(struct power_supply *psy,
	enum power_supply_property psp,
	union power_supply_propval *val)
{
	struct abx500_chargalg *di;

	di = to_abx500_chargalg_device_info(psy);

	switch (psp) {
	case POWER_SUPPLY_PROP_STATUS:
		val->intval = di->charge_status;
		break;
	case POWER_SUPPLY_PROP_HEALTH:
		if (di->events.batt_ovv) {
			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		} else if (di->events.btemp_underover) {
			if (di->batt_data.temp <= di->bm->temp_under)
				val->intval = POWER_SUPPLY_HEALTH_COLD;
			else
				val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		} else if (di->charge_state == STATE_SAFETY_TIMER_EXPIRED ||
			   di->charge_state == STATE_SAFETY_TIMER_EXPIRED_INIT) {
			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
		} else {
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		}
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/* Exposure to the sysfs interface */

/**
 * abx500_chargalg_sysfs_charger() - sysfs store operations
 * @kobj:      pointer to the struct kobject
 * @attr:      pointer to the struct attribute
 * @buf:       buffer that holds the parameter passed from userspace
 * @length:    length of the parameter passed
 *
 * Returns length of the buffer(input taken from user space) on success
 * else error code on failure
 * The operation to be performed on passing the parameters from the user space.
 */
static ssize_t abx500_chargalg_sysfs_charger(struct kobject *kobj,
	struct attribute *attr, const char *buf, size_t length)
{
	struct abx500_chargalg *di = container_of(kobj,
		struct abx500_chargalg, chargalg_kobject);
	long int param;
	int ac_usb;
	int ret;
	char entry = *attr->name;

	switch (entry) {
	case 'c':
		ret = strict_strtol(buf, 10, &param);
		if (ret < 0)
			return ret;

		ac_usb = param;
		switch (ac_usb) {
		case 0:
			/* Disable charging */
			di->susp_status.ac_suspended = true;
			di->susp_status.usb_suspended = true;
			di->susp_status.suspended_change = true;
			/* Trigger a state change */
			queue_work(di->chargalg_wq,
				&di->chargalg_work);
			break;
		case 1:
			/* Enable AC Charging */
			di->susp_status.ac_suspended = false;
			di->susp_status.suspended_change = true;
			/* Trigger a state change */
			queue_work(di->chargalg_wq,
				&di->chargalg_work);
			break;
		case 2:
			/* Enable USB charging */
			di->susp_status.usb_suspended = false;
			di->susp_status.suspended_change = true;
			/* Trigger a state change */
			queue_work(di->chargalg_wq,
				&di->chargalg_work);
			break;
		default:
			dev_info(di->dev, "Wrong input\n"
				"Enter 0. Disable AC/USB Charging\n"
				"1. Enable AC charging\n"
				"2. Enable USB Charging\n");
		};
		break;
	};
	return strlen(buf);
}

static struct attribute abx500_chargalg_en_charger = \
{
	.name = "chargalg",
	.mode = S_IWUSR,
};

static struct attribute *abx500_chargalg_chg[] = {
	&abx500_chargalg_en_charger,
	NULL
};

static const struct sysfs_ops abx500_chargalg_sysfs_ops = {
	.store = abx500_chargalg_sysfs_charger,
};

static struct kobj_type abx500_chargalg_ktype = {
	.sysfs_ops = &abx500_chargalg_sysfs_ops,
	.default_attrs = abx500_chargalg_chg,
};

/**
 * abx500_chargalg_sysfs_exit() - de-init of sysfs entry
 * @di:                pointer to the struct abx500_chargalg
 *
 * This function removes the entry in sysfs.
 */
static void abx500_chargalg_sysfs_exit(struct abx500_chargalg *di)
{
	kobject_del(&di->chargalg_kobject);
}

/**
 * abx500_chargalg_sysfs_init() - init of sysfs entry
 * @di:                pointer to the struct abx500_chargalg
 *
 * This function adds an entry in sysfs.
 * Returns error code in case of failure else 0(on success)
 */
static int abx500_chargalg_sysfs_init(struct abx500_chargalg *di)
{
	int ret = 0;

	ret = kobject_init_and_add(&di->chargalg_kobject,
		&abx500_chargalg_ktype,
		NULL, "abx500_chargalg");
	if (ret < 0)
		dev_err(di->dev, "failed to create sysfs entry\n");

	return ret;
}
/* Exposure to the sysfs interface <<END>> */

#if defined(CONFIG_PM)
static int abx500_chargalg_resume(struct platform_device *pdev)
{
	struct abx500_chargalg *di = platform_get_drvdata(pdev);

	/* Kick charger watchdog if charging (any charger online) */
	if (di->chg_info.online_chg)
		queue_delayed_work(di->chargalg_wq, &di->chargalg_wd_work, 0);

	/*
	 * Run the charging algorithm directly to be sure we don't
	 * do it too seldom
	 */
	queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0);

	return 0;
}

static int abx500_chargalg_suspend(struct platform_device *pdev,
	pm_message_t state)
{
	struct abx500_chargalg *di = platform_get_drvdata(pdev);

	if (di->chg_info.online_chg)
		cancel_delayed_work_sync(&di->chargalg_wd_work);

	cancel_delayed_work_sync(&di->chargalg_periodic_work);

	return 0;
}
#else
#define abx500_chargalg_suspend      NULL
#define abx500_chargalg_resume       NULL
#endif

static int abx500_chargalg_remove(struct platform_device *pdev)
{
	struct abx500_chargalg *di = platform_get_drvdata(pdev);

	/* sysfs interface to enable/disbale charging from user space */
	abx500_chargalg_sysfs_exit(di);

	/* Delete the work queue */
	destroy_workqueue(di->chargalg_wq);

	flush_scheduled_work();
	power_supply_unregister(&di->chargalg_psy);
	platform_set_drvdata(pdev, NULL);

	return 0;
}

static char *supply_interface[] = {
	"ab8500_fg",
};

static int abx500_chargalg_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct abx500_bm_data *plat = pdev->dev.platform_data;
	struct abx500_chargalg *di;
	int ret = 0;

	di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
	if (!di) {
		dev_err(&pdev->dev, "%s no mem for ab8500_chargalg\n", __func__);
		return -ENOMEM;
	}

	if (!plat) {
		dev_err(&pdev->dev, "no battery management data supplied\n");
		return -EINVAL;
	}
	di->bm = plat;

	if (np) {
		ret = ab8500_bm_of_probe(&pdev->dev, np, di->bm);
		if (ret) {
			dev_err(&pdev->dev, "failed to get battery information\n");
			return ret;
		}
	}

	/* get device struct */
	di->dev = &pdev->dev;

	/* chargalg supply */
	di->chargalg_psy.name = "abx500_chargalg";
	di->chargalg_psy.type = POWER_SUPPLY_TYPE_BATTERY;
	di->chargalg_psy.properties = abx500_chargalg_props;
	di->chargalg_psy.num_properties = ARRAY_SIZE(abx500_chargalg_props);
	di->chargalg_psy.get_property = abx500_chargalg_get_property;
	di->chargalg_psy.supplied_to = supply_interface;
	di->chargalg_psy.num_supplicants = ARRAY_SIZE(supply_interface),
	di->chargalg_psy.external_power_changed =
		abx500_chargalg_external_power_changed;

	/* Initilialize safety timer */
	init_timer(&di->safety_timer);
	di->safety_timer.function = abx500_chargalg_safety_timer_expired;
	di->safety_timer.data = (unsigned long) di;

	/* Initilialize maintenance timer */
	init_timer(&di->maintenance_timer);
	di->maintenance_timer.function =
		abx500_chargalg_maintenance_timer_expired;
	di->maintenance_timer.data = (unsigned long) di;

	/* Create a work queue for the chargalg */
	di->chargalg_wq =
		create_singlethread_workqueue("abx500_chargalg_wq");
	if (di->chargalg_wq == NULL) {
		dev_err(di->dev, "failed to create work queue\n");
		return -ENOMEM;
	}

	/* Init work for chargalg */
	INIT_DEFERRABLE_WORK(&di->chargalg_periodic_work,
		abx500_chargalg_periodic_work);
	INIT_DEFERRABLE_WORK(&di->chargalg_wd_work,
		abx500_chargalg_wd_work);

	/* Init work for chargalg */
	INIT_WORK(&di->chargalg_work, abx500_chargalg_work);

	/* To detect charger at startup */
	di->chg_info.prev_conn_chg = -1;

	/* Register chargalg power supply class */
	ret = power_supply_register(di->dev, &di->chargalg_psy);
	if (ret) {
		dev_err(di->dev, "failed to register chargalg psy\n");
		goto free_chargalg_wq;
	}

	platform_set_drvdata(pdev, di);

	/* sysfs interface to enable/disable charging from user space */
	ret = abx500_chargalg_sysfs_init(di);
	if (ret) {
		dev_err(di->dev, "failed to create sysfs entry\n");
		goto free_psy;
	}

	/* Run the charging algorithm */
	queue_delayed_work(di->chargalg_wq, &di->chargalg_periodic_work, 0);

	dev_info(di->dev, "probe success\n");
	return ret;

free_psy:
	power_supply_unregister(&di->chargalg_psy);
free_chargalg_wq:
	destroy_workqueue(di->chargalg_wq);
	return ret;
}

static const struct of_device_id ab8500_chargalg_match[] = {
	{ .compatible = "stericsson,ab8500-chargalg", },
	{ },
};

static struct platform_driver abx500_chargalg_driver = {
	.probe = abx500_chargalg_probe,
	.remove = abx500_chargalg_remove,
	.suspend = abx500_chargalg_suspend,
	.resume = abx500_chargalg_resume,
	.driver = {
		.name = "ab8500-chargalg",
		.owner = THIS_MODULE,
		.of_match_table = ab8500_chargalg_match,
	},
};

static int __init abx500_chargalg_init(void)
{
	return platform_driver_register(&abx500_chargalg_driver);
}

static void __exit abx500_chargalg_exit(void)
{
	platform_driver_unregister(&abx500_chargalg_driver);
}

module_init(abx500_chargalg_init);
module_exit(abx500_chargalg_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Johan Palsson, Karl Komierowski");
MODULE_ALIAS("platform:abx500-chargalg");
MODULE_DESCRIPTION("abx500 battery charging algorithm");