summaryrefslogtreecommitdiffstats
path: root/drivers/power/supply/ab8500_charger.c
blob: 86d88aec94a11a02017afd0f4a396d3b2bffa7dd (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
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) ST-Ericsson SA 2012
 *
 * Charger driver for AB8500
 *
 * Author:
 *	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/notifier.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/completion.h>
#include <linux/regulator/consumer.h>
#include <linux/err.h>
#include <linux/workqueue.h>
#include <linux/kobject.h>
#include <linux/of.h>
#include <linux/mfd/core.h>
#include <linux/mfd/abx500/ab8500.h>
#include <linux/mfd/abx500.h>
#include <linux/mfd/abx500/ab8500-bm.h>
#include <linux/mfd/abx500/ab8500-gpadc.h>
#include <linux/mfd/abx500/ux500_chargalg.h>
#include <linux/usb/otg.h>
#include <linux/mutex.h>

/* Charger constants */
#define NO_PW_CONN			0
#define AC_PW_CONN			1
#define USB_PW_CONN			2

#define MAIN_WDOG_ENA			0x01
#define MAIN_WDOG_KICK			0x02
#define MAIN_WDOG_DIS			0x00
#define CHARG_WD_KICK			0x01
#define MAIN_CH_ENA			0x01
#define MAIN_CH_NO_OVERSHOOT_ENA_N	0x02
#define USB_CH_ENA			0x01
#define USB_CHG_NO_OVERSHOOT_ENA_N	0x02
#define MAIN_CH_DET			0x01
#define MAIN_CH_CV_ON			0x04
#define USB_CH_CV_ON			0x08
#define VBUS_DET_DBNC100		0x02
#define VBUS_DET_DBNC1			0x01
#define OTP_ENABLE_WD			0x01
#define DROP_COUNT_RESET		0x01
#define USB_CH_DET			0x01

#define MAIN_CH_INPUT_CURR_SHIFT	4
#define VBUS_IN_CURR_LIM_SHIFT		4
#define AUTO_VBUS_IN_CURR_LIM_SHIFT	4
#define VBUS_IN_CURR_LIM_RETRY_SET_TIME	30 /* seconds */

#define LED_INDICATOR_PWM_ENA		0x01
#define LED_INDICATOR_PWM_DIS		0x00
#define LED_IND_CUR_5MA			0x04
#define LED_INDICATOR_PWM_DUTY_252_256	0xBF

/* HW failure constants */
#define MAIN_CH_TH_PROT			0x02
#define VBUS_CH_NOK			0x08
#define USB_CH_TH_PROT			0x02
#define VBUS_OVV_TH			0x01
#define MAIN_CH_NOK			0x01
#define VBUS_DET			0x80

#define MAIN_CH_STATUS2_MAINCHGDROP		0x80
#define MAIN_CH_STATUS2_MAINCHARGERDETDBNC	0x40
#define USB_CH_VBUSDROP				0x40
#define USB_CH_VBUSDETDBNC			0x01

/* UsbLineStatus register bit masks */
#define AB8500_USB_LINK_STATUS		0x78
#define AB8505_USB_LINK_STATUS		0xF8
#define AB8500_STD_HOST_SUSP		0x18
#define USB_LINK_STATUS_SHIFT		3

/* Watchdog timeout constant */
#define WD_TIMER			0x30 /* 4min */
#define WD_KICK_INTERVAL		(60 * HZ)

/* Lowest charger voltage is 3.39V -> 0x4E */
#define LOW_VOLT_REG			0x4E

/* Step up/down delay in us */
#define STEP_UDELAY			1000

#define CHARGER_STATUS_POLL 10 /* in ms */

#define CHG_WD_INTERVAL			(60 * HZ)

#define AB8500_SW_CONTROL_FALLBACK	0x03
/* Wait for enumeration before charing in us */
#define WAIT_ACA_RID_ENUMERATION	(5 * 1000)
/*External charger control*/
#define AB8500_SYS_CHARGER_CONTROL_REG		0x52
#define EXTERNAL_CHARGER_DISABLE_REG_VAL	0x03
#define EXTERNAL_CHARGER_ENABLE_REG_VAL		0x07

/* UsbLineStatus register - usb types */
enum ab8500_charger_link_status {
	USB_STAT_NOT_CONFIGURED,
	USB_STAT_STD_HOST_NC,
	USB_STAT_STD_HOST_C_NS,
	USB_STAT_STD_HOST_C_S,
	USB_STAT_HOST_CHG_NM,
	USB_STAT_HOST_CHG_HS,
	USB_STAT_HOST_CHG_HS_CHIRP,
	USB_STAT_DEDICATED_CHG,
	USB_STAT_ACA_RID_A,
	USB_STAT_ACA_RID_B,
	USB_STAT_ACA_RID_C_NM,
	USB_STAT_ACA_RID_C_HS,
	USB_STAT_ACA_RID_C_HS_CHIRP,
	USB_STAT_HM_IDGND,
	USB_STAT_RESERVED,
	USB_STAT_NOT_VALID_LINK,
	USB_STAT_PHY_EN,
	USB_STAT_SUP_NO_IDGND_VBUS,
	USB_STAT_SUP_IDGND_VBUS,
	USB_STAT_CHARGER_LINE_1,
	USB_STAT_CARKIT_1,
	USB_STAT_CARKIT_2,
	USB_STAT_ACA_DOCK_CHARGER,
};

enum ab8500_usb_state {
	AB8500_BM_USB_STATE_RESET_HS,	/* HighSpeed Reset */
	AB8500_BM_USB_STATE_RESET_FS,	/* FullSpeed/LowSpeed Reset */
	AB8500_BM_USB_STATE_CONFIGURED,
	AB8500_BM_USB_STATE_SUSPEND,
	AB8500_BM_USB_STATE_RESUME,
	AB8500_BM_USB_STATE_MAX,
};

/* VBUS input current limits supported in AB8500 in mA */
#define USB_CH_IP_CUR_LVL_0P05		50
#define USB_CH_IP_CUR_LVL_0P09		98
#define USB_CH_IP_CUR_LVL_0P19		193
#define USB_CH_IP_CUR_LVL_0P29		290
#define USB_CH_IP_CUR_LVL_0P38		380
#define USB_CH_IP_CUR_LVL_0P45		450
#define USB_CH_IP_CUR_LVL_0P5		500
#define USB_CH_IP_CUR_LVL_0P6		600
#define USB_CH_IP_CUR_LVL_0P7		700
#define USB_CH_IP_CUR_LVL_0P8		800
#define USB_CH_IP_CUR_LVL_0P9		900
#define USB_CH_IP_CUR_LVL_1P0		1000
#define USB_CH_IP_CUR_LVL_1P1		1100
#define USB_CH_IP_CUR_LVL_1P3		1300
#define USB_CH_IP_CUR_LVL_1P4		1400
#define USB_CH_IP_CUR_LVL_1P5		1500

#define VBAT_TRESH_IP_CUR_RED		3800

#define to_ab8500_charger_usb_device_info(x) container_of((x), \
	struct ab8500_charger, usb_chg)
#define to_ab8500_charger_ac_device_info(x) container_of((x), \
	struct ab8500_charger, ac_chg)

/**
 * struct ab8500_charger_interrupts - ab8500 interupts
 * @name:	name of the interrupt
 * @isr		function pointer to the isr
 */
struct ab8500_charger_interrupts {
	char *name;
	irqreturn_t (*isr)(int irq, void *data);
};

struct ab8500_charger_info {
	int charger_connected;
	int charger_online;
	int charger_voltage;
	int cv_active;
	bool wd_expired;
	int charger_current;
};

struct ab8500_charger_event_flags {
	bool mainextchnotok;
	bool main_thermal_prot;
	bool usb_thermal_prot;
	bool vbus_ovv;
	bool usbchargernotok;
	bool chgwdexp;
	bool vbus_collapse;
	bool vbus_drop_end;
};

struct ab8500_charger_usb_state {
	int usb_current;
	int usb_current_tmp;
	enum ab8500_usb_state state;
	enum ab8500_usb_state state_tmp;
	spinlock_t usb_lock;
};

struct ab8500_charger_max_usb_in_curr {
	int usb_type_max;
	int set_max;
	int calculated_max;
};

/**
 * struct ab8500_charger - ab8500 Charger device information
 * @dev:		Pointer to the structure device
 * @vbus_detected:	VBUS detected
 * @vbus_detected_start:
 *			VBUS detected during startup
 * @ac_conn:		This will be true when the AC charger has been plugged
 * @vddadc_en_ac:	Indicate if VDD ADC supply is enabled because AC
 *			charger is enabled
 * @vddadc_en_usb:	Indicate if VDD ADC supply is enabled because USB
 *			charger is enabled
 * @vbat		Battery voltage
 * @old_vbat		Previously measured battery voltage
 * @usb_device_is_unrecognised	USB device is unrecognised by the hardware
 * @autopower		Indicate if we should have automatic pwron after pwrloss
 * @autopower_cfg	platform specific power config support for "pwron after pwrloss"
 * @invalid_charger_detect_state State when forcing AB to use invalid charger
 * @is_aca_rid:		Incicate if accessory is ACA type
 * @current_stepping_sessions:
 *			Counter for current stepping sessions
 * @parent:		Pointer to the struct ab8500
 * @gpadc:		Pointer to the struct gpadc
 * @bm:           	Platform specific battery management information
 * @flags:		Structure for information about events triggered
 * @usb_state:		Structure for usb stack information
 * @max_usb_in_curr:	Max USB charger input current
 * @ac_chg:		AC charger power supply
 * @usb_chg:		USB charger power supply
 * @ac:			Structure that holds the AC charger properties
 * @usb:		Structure that holds the USB charger properties
 * @regu:		Pointer to the struct regulator
 * @charger_wq:		Work queue for the IRQs and checking HW state
 * @usb_ipt_crnt_lock:	Lock to protect VBUS input current setting from mutuals
 * @pm_lock:		Lock to prevent system to suspend
 * @check_vbat_work	Work for checking vbat threshold to adjust vbus current
 * @check_hw_failure_work:	Work for checking HW state
 * @check_usbchgnotok_work:	Work for checking USB charger not ok status
 * @kick_wd_work:		Work for kicking the charger watchdog in case
 *				of ABB rev 1.* due to the watchog logic bug
 * @ac_charger_attached_work:	Work for checking if AC charger is still
 *				connected
 * @usb_charger_attached_work:	Work for checking if USB charger is still
 *				connected
 * @ac_work:			Work for checking AC charger connection
 * @detect_usb_type_work:	Work for detecting the USB type connected
 * @usb_link_status_work:	Work for checking the new USB link status
 * @usb_state_changed_work:	Work for checking USB state
 * @attach_work:		Work for detecting USB type
 * @vbus_drop_end_work:		Work for detecting VBUS drop end
 * @check_main_thermal_prot_work:
 *				Work for checking Main thermal status
 * @check_usb_thermal_prot_work:
 *				Work for checking USB thermal status
 * @charger_attached_mutex:	For controlling the wakelock
 */
struct ab8500_charger {
	struct device *dev;
	bool vbus_detected;
	bool vbus_detected_start;
	bool ac_conn;
	bool vddadc_en_ac;
	bool vddadc_en_usb;
	int vbat;
	int old_vbat;
	bool usb_device_is_unrecognised;
	bool autopower;
	bool autopower_cfg;
	int invalid_charger_detect_state;
	int is_aca_rid;
	atomic_t current_stepping_sessions;
	struct ab8500 *parent;
	struct ab8500_gpadc *gpadc;
	struct abx500_bm_data *bm;
	struct ab8500_charger_event_flags flags;
	struct ab8500_charger_usb_state usb_state;
	struct ab8500_charger_max_usb_in_curr max_usb_in_curr;
	struct ux500_charger ac_chg;
	struct ux500_charger usb_chg;
	struct ab8500_charger_info ac;
	struct ab8500_charger_info usb;
	struct regulator *regu;
	struct workqueue_struct *charger_wq;
	struct mutex usb_ipt_crnt_lock;
	struct delayed_work check_vbat_work;
	struct delayed_work check_hw_failure_work;
	struct delayed_work check_usbchgnotok_work;
	struct delayed_work kick_wd_work;
	struct delayed_work usb_state_changed_work;
	struct delayed_work attach_work;
	struct delayed_work ac_charger_attached_work;
	struct delayed_work usb_charger_attached_work;
	struct delayed_work vbus_drop_end_work;
	struct work_struct ac_work;
	struct work_struct detect_usb_type_work;
	struct work_struct usb_link_status_work;
	struct work_struct check_main_thermal_prot_work;
	struct work_struct check_usb_thermal_prot_work;
	struct usb_phy *usb_phy;
	struct notifier_block nb;
	struct mutex charger_attached_mutex;
};

/* AC properties */
static enum power_supply_property ab8500_charger_ac_props[] = {
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_AVG,
	POWER_SUPPLY_PROP_CURRENT_NOW,
};

/* USB properties */
static enum power_supply_property ab8500_charger_usb_props[] = {
	POWER_SUPPLY_PROP_HEALTH,
	POWER_SUPPLY_PROP_CURRENT_AVG,
	POWER_SUPPLY_PROP_PRESENT,
	POWER_SUPPLY_PROP_ONLINE,
	POWER_SUPPLY_PROP_VOLTAGE_NOW,
	POWER_SUPPLY_PROP_VOLTAGE_AVG,
	POWER_SUPPLY_PROP_CURRENT_NOW,
};

/*
 * Function for enabling and disabling sw fallback mode
 * should always be disabled when no charger is connected.
 */
static void ab8500_enable_disable_sw_fallback(struct ab8500_charger *di,
		bool fallback)
{
	u8 val;
	u8 reg;
	u8 bank;
	u8 bit;
	int ret;

	dev_dbg(di->dev, "SW Fallback: %d\n", fallback);

	if (is_ab8500(di->parent)) {
		bank = 0x15;
		reg = 0x0;
		bit = 3;
	} else {
		bank = AB8500_SYS_CTRL1_BLOCK;
		reg = AB8500_SW_CONTROL_FALLBACK;
		bit = 0;
	}

	/* read the register containing fallback bit */
	ret = abx500_get_register_interruptible(di->dev, bank, reg, &val);
	if (ret < 0) {
		dev_err(di->dev, "%d read failed\n", __LINE__);
		return;
	}

	if (is_ab8500(di->parent)) {
		/* enable the OPT emulation registers */
		ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x2);
		if (ret) {
			dev_err(di->dev, "%d write failed\n", __LINE__);
			goto disable_otp;
		}
	}

	if (fallback)
		val |= (1 << bit);
	else
		val &= ~(1 << bit);

	/* write back the changed fallback bit value to register */
	ret = abx500_set_register_interruptible(di->dev, bank, reg, val);
	if (ret) {
		dev_err(di->dev, "%d write failed\n", __LINE__);
	}

disable_otp:
	if (is_ab8500(di->parent)) {
		/* disable the set OTP registers again */
		ret = abx500_set_register_interruptible(di->dev, 0x11, 0x00, 0x0);
		if (ret) {
			dev_err(di->dev, "%d write failed\n", __LINE__);
		}
	}
}

/**
 * ab8500_power_supply_changed - a wrapper with local extentions for
 * power_supply_changed
 * @di:	  pointer to the ab8500_charger structure
 * @psy:  pointer to power_supply_that have changed.
 *
 */
static void ab8500_power_supply_changed(struct ab8500_charger *di,
					struct power_supply *psy)
{
	if (di->autopower_cfg) {
		if (!di->usb.charger_connected &&
		    !di->ac.charger_connected &&
		    di->autopower) {
			di->autopower = false;
			ab8500_enable_disable_sw_fallback(di, false);
		} else if (!di->autopower &&
			   (di->ac.charger_connected ||
			    di->usb.charger_connected)) {
			di->autopower = true;
			ab8500_enable_disable_sw_fallback(di, true);
		}
	}
	power_supply_changed(psy);
}

static void ab8500_charger_set_usb_connected(struct ab8500_charger *di,
	bool connected)
{
	if (connected != di->usb.charger_connected) {
		dev_dbg(di->dev, "USB connected:%i\n", connected);
		di->usb.charger_connected = connected;

		if (!connected)
			di->flags.vbus_drop_end = false;

		sysfs_notify(&di->usb_chg.psy->dev.kobj, NULL, "present");

		if (connected) {
			mutex_lock(&di->charger_attached_mutex);
			mutex_unlock(&di->charger_attached_mutex);

			if (is_ab8500(di->parent))
				queue_delayed_work(di->charger_wq,
					   &di->usb_charger_attached_work,
					   HZ);
		} else {
			cancel_delayed_work_sync(&di->usb_charger_attached_work);
			mutex_lock(&di->charger_attached_mutex);
			mutex_unlock(&di->charger_attached_mutex);
		}
	}
}

/**
 * ab8500_charger_get_ac_voltage() - get ac charger voltage
 * @di:		pointer to the ab8500_charger structure
 *
 * Returns ac charger voltage (on success)
 */
static int ab8500_charger_get_ac_voltage(struct ab8500_charger *di)
{
	int vch;

	/* Only measure voltage if the charger is connected */
	if (di->ac.charger_connected) {
		vch = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_V);
		if (vch < 0)
			dev_err(di->dev, "%s gpadc conv failed,\n", __func__);
	} else {
		vch = 0;
	}
	return vch;
}

/**
 * ab8500_charger_ac_cv() - check if the main charger is in CV mode
 * @di:		pointer to the ab8500_charger structure
 *
 * Returns ac charger CV mode (on success) else error code
 */
static int ab8500_charger_ac_cv(struct ab8500_charger *di)
{
	u8 val;
	int ret = 0;

	/* Only check CV mode if the charger is online */
	if (di->ac.charger_online) {
		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_CH_STATUS1_REG, &val);
		if (ret < 0) {
			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
			return 0;
		}

		if (val & MAIN_CH_CV_ON)
			ret = 1;
		else
			ret = 0;
	}

	return ret;
}

/**
 * ab8500_charger_get_vbus_voltage() - get vbus voltage
 * @di:		pointer to the ab8500_charger structure
 *
 * This function returns the vbus voltage.
 * Returns vbus voltage (on success)
 */
static int ab8500_charger_get_vbus_voltage(struct ab8500_charger *di)
{
	int vch;

	/* Only measure voltage if the charger is connected */
	if (di->usb.charger_connected) {
		vch = ab8500_gpadc_convert(di->gpadc, VBUS_V);
		if (vch < 0)
			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
	} else {
		vch = 0;
	}
	return vch;
}

/**
 * ab8500_charger_get_usb_current() - get usb charger current
 * @di:		pointer to the ab8500_charger structure
 *
 * This function returns the usb charger current.
 * Returns usb current (on success) and error code on failure
 */
static int ab8500_charger_get_usb_current(struct ab8500_charger *di)
{
	int ich;

	/* Only measure current if the charger is online */
	if (di->usb.charger_online) {
		ich = ab8500_gpadc_convert(di->gpadc, USB_CHARGER_C);
		if (ich < 0)
			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
	} else {
		ich = 0;
	}
	return ich;
}

/**
 * ab8500_charger_get_ac_current() - get ac charger current
 * @di:		pointer to the ab8500_charger structure
 *
 * This function returns the ac charger current.
 * Returns ac current (on success) and error code on failure.
 */
static int ab8500_charger_get_ac_current(struct ab8500_charger *di)
{
	int ich;

	/* Only measure current if the charger is online */
	if (di->ac.charger_online) {
		ich = ab8500_gpadc_convert(di->gpadc, MAIN_CHARGER_C);
		if (ich < 0)
			dev_err(di->dev, "%s gpadc conv failed\n", __func__);
	} else {
		ich = 0;
	}
	return ich;
}

/**
 * ab8500_charger_usb_cv() - check if the usb charger is in CV mode
 * @di:		pointer to the ab8500_charger structure
 *
 * Returns ac charger CV mode (on success) else error code
 */
static int ab8500_charger_usb_cv(struct ab8500_charger *di)
{
	int ret;
	u8 val;

	/* Only check CV mode if the charger is online */
	if (di->usb.charger_online) {
		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_CH_USBCH_STAT1_REG, &val);
		if (ret < 0) {
			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
			return 0;
		}

		if (val & USB_CH_CV_ON)
			ret = 1;
		else
			ret = 0;
	} else {
		ret = 0;
	}

	return ret;
}

/**
 * ab8500_charger_detect_chargers() - Detect the connected chargers
 * @di:		pointer to the ab8500_charger structure
 * @probe:	if probe, don't delay and wait for HW
 *
 * Returns the type of charger connected.
 * For USB it will not mean we can actually charge from it
 * but that there is a USB cable connected that we have to
 * identify. This is used during startup when we don't get
 * interrupts of the charger detection
 *
 * Returns an integer value, that means,
 * NO_PW_CONN  no power supply is connected
 * AC_PW_CONN  if the AC power supply is connected
 * USB_PW_CONN  if the USB power supply is connected
 * AC_PW_CONN + USB_PW_CONN if USB and AC power supplies are both connected
 */
static int ab8500_charger_detect_chargers(struct ab8500_charger *di, bool probe)
{
	int result = NO_PW_CONN;
	int ret;
	u8 val;

	/* Check for AC charger */
	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
		AB8500_CH_STATUS1_REG, &val);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return ret;
	}

	if (val & MAIN_CH_DET)
		result = AC_PW_CONN;

	/* Check for USB charger */

	if (!probe) {
		/*
		 * AB8500 says VBUS_DET_DBNC1 & VBUS_DET_DBNC100
		 * when disconnecting ACA even though no
		 * charger was connected. Try waiting a little
		 * longer than the 100 ms of VBUS_DET_DBNC100...
		 */
		msleep(110);
	}
	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
		AB8500_CH_USBCH_STAT1_REG, &val);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return ret;
	}
	dev_dbg(di->dev,
		"%s AB8500_CH_USBCH_STAT1_REG %x\n", __func__,
		val);
	if ((val & VBUS_DET_DBNC1) && (val & VBUS_DET_DBNC100))
		result |= USB_PW_CONN;

	return result;
}

/**
 * ab8500_charger_max_usb_curr() - get the max curr for the USB type
 * @di:			pointer to the ab8500_charger structure
 * @link_status:	the identified USB type
 *
 * Get the maximum current that is allowed to be drawn from the host
 * based on the USB type.
 * Returns error code in case of failure else 0 on success
 */
static int ab8500_charger_max_usb_curr(struct ab8500_charger *di,
		enum ab8500_charger_link_status link_status)
{
	int ret = 0;

	di->usb_device_is_unrecognised = false;

	/*
	 * Platform only supports USB 2.0.
	 * This means that charging current from USB source
	 * is maximum 500 mA. Every occurence of USB_STAT_*_HOST_*
	 * should set USB_CH_IP_CUR_LVL_0P5.
	 */

	switch (link_status) {
	case USB_STAT_STD_HOST_NC:
	case USB_STAT_STD_HOST_C_NS:
	case USB_STAT_STD_HOST_C_S:
		dev_dbg(di->dev, "USB Type - Standard host is "
			"detected through USB driver\n");
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		di->is_aca_rid = 0;
		break;
	case USB_STAT_HOST_CHG_HS_CHIRP:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		di->is_aca_rid = 0;
		break;
	case USB_STAT_HOST_CHG_HS:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		di->is_aca_rid = 0;
		break;
	case USB_STAT_ACA_RID_C_HS:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P9;
		di->is_aca_rid = 0;
		break;
	case USB_STAT_ACA_RID_A:
		/*
		 * Dedicated charger level minus maximum current accessory
		 * can consume (900mA). Closest level is 500mA
		 */
		dev_dbg(di->dev, "USB_STAT_ACA_RID_A detected\n");
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		di->is_aca_rid = 1;
		break;
	case USB_STAT_ACA_RID_B:
		/*
		 * Dedicated charger level minus 120mA (20mA for ACA and
		 * 100mA for potential accessory). Closest level is 1300mA
		 */
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P3;
		dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
				di->max_usb_in_curr.usb_type_max);
		di->is_aca_rid = 1;
		break;
	case USB_STAT_HOST_CHG_NM:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		di->is_aca_rid = 0;
		break;
	case USB_STAT_DEDICATED_CHG:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
		di->is_aca_rid = 0;
		break;
	case USB_STAT_ACA_RID_C_HS_CHIRP:
	case USB_STAT_ACA_RID_C_NM:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_1P5;
		di->is_aca_rid = 1;
		break;
	case USB_STAT_NOT_CONFIGURED:
		if (di->vbus_detected) {
			di->usb_device_is_unrecognised = true;
			dev_dbg(di->dev, "USB Type - Legacy charger.\n");
			di->max_usb_in_curr.usb_type_max =
						USB_CH_IP_CUR_LVL_1P5;
			break;
		}
		/* Else, fall through */
	case USB_STAT_HM_IDGND:
		dev_err(di->dev, "USB Type - Charging not allowed\n");
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
		ret = -ENXIO;
		break;
	case USB_STAT_RESERVED:
		if (is_ab8500(di->parent)) {
			di->flags.vbus_collapse = true;
			dev_err(di->dev, "USB Type - USB_STAT_RESERVED "
						"VBUS has collapsed\n");
			ret = -ENXIO;
			break;
		} else {
			dev_dbg(di->dev, "USB Type - Charging not allowed\n");
			di->max_usb_in_curr.usb_type_max =
						USB_CH_IP_CUR_LVL_0P05;
			dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
				link_status,
				di->max_usb_in_curr.usb_type_max);
			ret = -ENXIO;
			break;
		}
	case USB_STAT_CARKIT_1:
	case USB_STAT_CARKIT_2:
	case USB_STAT_ACA_DOCK_CHARGER:
	case USB_STAT_CHARGER_LINE_1:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d", link_status,
				di->max_usb_in_curr.usb_type_max);
		break;
	case USB_STAT_NOT_VALID_LINK:
		dev_err(di->dev, "USB Type invalid - try charging anyway\n");
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		break;

	default:
		dev_err(di->dev, "USB Type - Unknown\n");
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
		ret = -ENXIO;
		break;
	};

	di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
	dev_dbg(di->dev, "USB Type - 0x%02x MaxCurr: %d",
		link_status, di->max_usb_in_curr.set_max);

	return ret;
}

/**
 * ab8500_charger_read_usb_type() - read the type of usb connected
 * @di:		pointer to the ab8500_charger structure
 *
 * Detect the type of the plugged USB
 * Returns error code in case of failure else 0 on success
 */
static int ab8500_charger_read_usb_type(struct ab8500_charger *di)
{
	int ret;
	u8 val;

	ret = abx500_get_register_interruptible(di->dev,
		AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG, &val);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return ret;
	}
	if (is_ab8500(di->parent))
		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
			AB8500_USB_LINE_STAT_REG, &val);
	else
		ret = abx500_get_register_interruptible(di->dev,
			AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return ret;
	}

	/* get the USB type */
	if (is_ab8500(di->parent))
		val = (val & AB8500_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
	else
		val = (val & AB8505_USB_LINK_STATUS) >> USB_LINK_STATUS_SHIFT;
	ret = ab8500_charger_max_usb_curr(di,
		(enum ab8500_charger_link_status) val);

	return ret;
}

/**
 * ab8500_charger_detect_usb_type() - get the type of usb connected
 * @di:		pointer to the ab8500_charger structure
 *
 * Detect the type of the plugged USB
 * Returns error code in case of failure else 0 on success
 */
static int ab8500_charger_detect_usb_type(struct ab8500_charger *di)
{
	int i, ret;
	u8 val;

	/*
	 * On getting the VBUS rising edge detect interrupt there
	 * is a 250ms delay after which the register UsbLineStatus
	 * is filled with valid data.
	 */
	for (i = 0; i < 10; i++) {
		msleep(250);
		ret = abx500_get_register_interruptible(di->dev,
			AB8500_INTERRUPT, AB8500_IT_SOURCE21_REG,
			&val);
		dev_dbg(di->dev, "%s AB8500_IT_SOURCE21_REG %x\n",
			__func__, val);
		if (ret < 0) {
			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
			return ret;
		}

		if (is_ab8500(di->parent))
			ret = abx500_get_register_interruptible(di->dev,
				AB8500_USB, AB8500_USB_LINE_STAT_REG, &val);
		else
			ret = abx500_get_register_interruptible(di->dev,
				AB8500_USB, AB8500_USB_LINK1_STAT_REG, &val);
		if (ret < 0) {
			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
			return ret;
		}
		dev_dbg(di->dev, "%s AB8500_USB_LINE_STAT_REG %x\n", __func__,
			val);
		/*
		 * Until the IT source register is read the UsbLineStatus
		 * register is not updated, hence doing the same
		 * Revisit this:
		 */

		/* get the USB type */
		if (is_ab8500(di->parent))
			val = (val & AB8500_USB_LINK_STATUS) >>
							USB_LINK_STATUS_SHIFT;
		else
			val = (val & AB8505_USB_LINK_STATUS) >>
							USB_LINK_STATUS_SHIFT;
		if (val)
			break;
	}
	ret = ab8500_charger_max_usb_curr(di,
		(enum ab8500_charger_link_status) val);

	return ret;
}

/*
 * This array maps the raw hex value to charger voltage used by the AB8500
 * Values taken from the UM0836
 */
static int ab8500_charger_voltage_map[] = {
	3500 ,
	3525 ,
	3550 ,
	3575 ,
	3600 ,
	3625 ,
	3650 ,
	3675 ,
	3700 ,
	3725 ,
	3750 ,
	3775 ,
	3800 ,
	3825 ,
	3850 ,
	3875 ,
	3900 ,
	3925 ,
	3950 ,
	3975 ,
	4000 ,
	4025 ,
	4050 ,
	4060 ,
	4070 ,
	4080 ,
	4090 ,
	4100 ,
	4110 ,
	4120 ,
	4130 ,
	4140 ,
	4150 ,
	4160 ,
	4170 ,
	4180 ,
	4190 ,
	4200 ,
	4210 ,
	4220 ,
	4230 ,
	4240 ,
	4250 ,
	4260 ,
	4270 ,
	4280 ,
	4290 ,
	4300 ,
	4310 ,
	4320 ,
	4330 ,
	4340 ,
	4350 ,
	4360 ,
	4370 ,
	4380 ,
	4390 ,
	4400 ,
	4410 ,
	4420 ,
	4430 ,
	4440 ,
	4450 ,
	4460 ,
	4470 ,
	4480 ,
	4490 ,
	4500 ,
	4510 ,
	4520 ,
	4530 ,
	4540 ,
	4550 ,
	4560 ,
	4570 ,
	4580 ,
	4590 ,
	4600 ,
};

static int ab8500_voltage_to_regval(int voltage)
{
	int i;

	/* Special case for voltage below 3.5V */
	if (voltage < ab8500_charger_voltage_map[0])
		return LOW_VOLT_REG;

	for (i = 1; i < ARRAY_SIZE(ab8500_charger_voltage_map); i++) {
		if (voltage < ab8500_charger_voltage_map[i])
			return i - 1;
	}

	/* If not last element, return error */
	i = ARRAY_SIZE(ab8500_charger_voltage_map) - 1;
	if (voltage == ab8500_charger_voltage_map[i])
		return i;
	else
		return -1;
}

static int ab8500_current_to_regval(struct ab8500_charger *di, int curr)
{
	int i;

	if (curr < di->bm->chg_output_curr[0])
		return 0;

	for (i = 0; i < di->bm->n_chg_out_curr; i++) {
		if (curr < di->bm->chg_output_curr[i])
			return i - 1;
	}

	/* If not last element, return error */
	i = di->bm->n_chg_out_curr - 1;
	if (curr == di->bm->chg_output_curr[i])
		return i;
	else
		return -1;
}

static int ab8500_vbus_in_curr_to_regval(struct ab8500_charger *di, int curr)
{
	int i;

	if (curr < di->bm->chg_input_curr[0])
		return 0;

	for (i = 0; i < di->bm->n_chg_in_curr; i++) {
		if (curr < di->bm->chg_input_curr[i])
			return i - 1;
	}

	/* If not last element, return error */
	i = di->bm->n_chg_in_curr - 1;
	if (curr == di->bm->chg_input_curr[i])
		return i;
	else
		return -1;
}

/**
 * ab8500_charger_get_usb_cur() - get usb current
 * @di:		pointer to the ab8500_charger structre
 *
 * The usb stack provides the maximum current that can be drawn from
 * the standard usb host. This will be in mA.
 * This function converts current in mA to a value that can be written
 * to the register. Returns -1 if charging is not allowed
 */
static int ab8500_charger_get_usb_cur(struct ab8500_charger *di)
{
	int ret = 0;
	switch (di->usb_state.usb_current) {
	case 100:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P09;
		break;
	case 200:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P19;
		break;
	case 300:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P29;
		break;
	case 400:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P38;
		break;
	case 500:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P5;
		break;
	default:
		di->max_usb_in_curr.usb_type_max = USB_CH_IP_CUR_LVL_0P05;
		ret = -EPERM;
		break;
	};
	di->max_usb_in_curr.set_max = di->max_usb_in_curr.usb_type_max;
	return ret;
}

/**
 * ab8500_charger_check_continue_stepping() - Check to allow stepping
 * @di:		pointer to the ab8500_charger structure
 * @reg:	select what charger register to check
 *
 * Check if current stepping should be allowed to continue.
 * Checks if charger source has not collapsed. If it has, further stepping
 * is not allowed.
 */
static bool ab8500_charger_check_continue_stepping(struct ab8500_charger *di,
						   int reg)
{
	if (reg == AB8500_USBCH_IPT_CRNTLVL_REG)
		return !di->flags.vbus_drop_end;
	else
		return true;
}

/**
 * ab8500_charger_set_current() - set charger current
 * @di:		pointer to the ab8500_charger structure
 * @ich:	charger current, in mA
 * @reg:	select what charger register to set
 *
 * Set charger current.
 * There is no state machine in the AB to step up/down the charger
 * current to avoid dips and spikes on MAIN, VBUS and VBAT when
 * charging is started. Instead we need to implement
 * this charger current step-up/down here.
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_set_current(struct ab8500_charger *di,
	int ich, int reg)
{
	int ret = 0;
	int curr_index, prev_curr_index, shift_value, i;
	u8 reg_value;
	u32 step_udelay;
	bool no_stepping = false;

	atomic_inc(&di->current_stepping_sessions);

	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
		reg, &reg_value);
	if (ret < 0) {
		dev_err(di->dev, "%s read failed\n", __func__);
		goto exit_set_current;
	}

	switch (reg) {
	case AB8500_MCH_IPT_CURLVL_REG:
		shift_value = MAIN_CH_INPUT_CURR_SHIFT;
		prev_curr_index = (reg_value >> shift_value);
		curr_index = ab8500_current_to_regval(di, ich);
		step_udelay = STEP_UDELAY;
		if (!di->ac.charger_connected)
			no_stepping = true;
		break;
	case AB8500_USBCH_IPT_CRNTLVL_REG:
		shift_value = VBUS_IN_CURR_LIM_SHIFT;
		prev_curr_index = (reg_value >> shift_value);
		curr_index = ab8500_vbus_in_curr_to_regval(di, ich);
		step_udelay = STEP_UDELAY * 100;

		if (!di->usb.charger_connected)
			no_stepping = true;
		break;
	case AB8500_CH_OPT_CRNTLVL_REG:
		shift_value = 0;
		prev_curr_index = (reg_value >> shift_value);
		curr_index = ab8500_current_to_regval(di, ich);
		step_udelay = STEP_UDELAY;
		if (curr_index && (curr_index - prev_curr_index) > 1)
			step_udelay *= 100;

		if (!di->usb.charger_connected && !di->ac.charger_connected)
			no_stepping = true;

		break;
	default:
		dev_err(di->dev, "%s current register not valid\n", __func__);
		ret = -ENXIO;
		goto exit_set_current;
	}

	if (curr_index < 0) {
		dev_err(di->dev, "requested current limit out-of-range\n");
		ret = -ENXIO;
		goto exit_set_current;
	}

	/* only update current if it's been changed */
	if (prev_curr_index == curr_index) {
		dev_dbg(di->dev, "%s current not changed for reg: 0x%02x\n",
			__func__, reg);
		ret = 0;
		goto exit_set_current;
	}

	dev_dbg(di->dev, "%s set charger current: %d mA for reg: 0x%02x\n",
		__func__, ich, reg);

	if (no_stepping) {
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
					reg, (u8)curr_index << shift_value);
		if (ret)
			dev_err(di->dev, "%s write failed\n", __func__);
	} else if (prev_curr_index > curr_index) {
		for (i = prev_curr_index - 1; i >= curr_index; i--) {
			dev_dbg(di->dev, "curr change_1 to: %x for 0x%02x\n",
				(u8) i << shift_value, reg);
			ret = abx500_set_register_interruptible(di->dev,
				AB8500_CHARGER, reg, (u8)i << shift_value);
			if (ret) {
				dev_err(di->dev, "%s write failed\n", __func__);
				goto exit_set_current;
			}
			if (i != curr_index)
				usleep_range(step_udelay, step_udelay * 2);
		}
	} else {
		bool allow = true;
		for (i = prev_curr_index + 1; i <= curr_index && allow; i++) {
			dev_dbg(di->dev, "curr change_2 to: %x for 0x%02x\n",
				(u8)i << shift_value, reg);
			ret = abx500_set_register_interruptible(di->dev,
				AB8500_CHARGER, reg, (u8)i << shift_value);
			if (ret) {
				dev_err(di->dev, "%s write failed\n", __func__);
				goto exit_set_current;
			}
			if (i != curr_index)
				usleep_range(step_udelay, step_udelay * 2);

			allow = ab8500_charger_check_continue_stepping(di, reg);
		}
	}

exit_set_current:
	atomic_dec(&di->current_stepping_sessions);

	return ret;
}

/**
 * ab8500_charger_set_vbus_in_curr() - set VBUS input current limit
 * @di:		pointer to the ab8500_charger structure
 * @ich_in:	charger input current limit
 *
 * Sets the current that can be drawn from the USB host
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_set_vbus_in_curr(struct ab8500_charger *di,
		int ich_in)
{
	int min_value;
	int ret;

	/* We should always use to lowest current limit */
	min_value = min(di->bm->chg_params->usb_curr_max, ich_in);
	if (di->max_usb_in_curr.set_max > 0)
		min_value = min(di->max_usb_in_curr.set_max, min_value);

	if (di->usb_state.usb_current >= 0)
		min_value = min(di->usb_state.usb_current, min_value);

	switch (min_value) {
	case 100:
		if (di->vbat < VBAT_TRESH_IP_CUR_RED)
			min_value = USB_CH_IP_CUR_LVL_0P05;
		break;
	case 500:
		if (di->vbat < VBAT_TRESH_IP_CUR_RED)
			min_value = USB_CH_IP_CUR_LVL_0P45;
		break;
	default:
		break;
	}

	dev_info(di->dev, "VBUS input current limit set to %d mA\n", min_value);

	mutex_lock(&di->usb_ipt_crnt_lock);
	ret = ab8500_charger_set_current(di, min_value,
		AB8500_USBCH_IPT_CRNTLVL_REG);
	mutex_unlock(&di->usb_ipt_crnt_lock);

	return ret;
}

/**
 * ab8500_charger_set_main_in_curr() - set main charger input current
 * @di:		pointer to the ab8500_charger structure
 * @ich_in:	input charger current, in mA
 *
 * Set main charger input current.
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_set_main_in_curr(struct ab8500_charger *di,
	int ich_in)
{
	return ab8500_charger_set_current(di, ich_in,
		AB8500_MCH_IPT_CURLVL_REG);
}

/**
 * ab8500_charger_set_output_curr() - set charger output current
 * @di:		pointer to the ab8500_charger structure
 * @ich_out:	output charger current, in mA
 *
 * Set charger output current.
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_set_output_curr(struct ab8500_charger *di,
	int ich_out)
{
	return ab8500_charger_set_current(di, ich_out,
		AB8500_CH_OPT_CRNTLVL_REG);
}

/**
 * ab8500_charger_led_en() - turn on/off chargign led
 * @di:		pointer to the ab8500_charger structure
 * @on:		flag to turn on/off the chargign led
 *
 * Power ON/OFF charging LED indication
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_led_en(struct ab8500_charger *di, int on)
{
	int ret;

	if (on) {
		/* Power ON charging LED indicator, set LED current to 5mA */
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_LED_INDICATOR_PWM_CTRL,
			(LED_IND_CUR_5MA | LED_INDICATOR_PWM_ENA));
		if (ret) {
			dev_err(di->dev, "Power ON LED failed\n");
			return ret;
		}
		/* LED indicator PWM duty cycle 252/256 */
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_LED_INDICATOR_PWM_DUTY,
			LED_INDICATOR_PWM_DUTY_252_256);
		if (ret) {
			dev_err(di->dev, "Set LED PWM duty cycle failed\n");
			return ret;
		}
	} else {
		/* Power off charging LED indicator */
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_LED_INDICATOR_PWM_CTRL,
			LED_INDICATOR_PWM_DIS);
		if (ret) {
			dev_err(di->dev, "Power-off LED failed\n");
			return ret;
		}
	}

	return ret;
}

/**
 * ab8500_charger_ac_en() - enable or disable ac charging
 * @di:		pointer to the ab8500_charger structure
 * @enable:	enable/disable flag
 * @vset:	charging voltage
 * @iset:	charging current
 *
 * Enable/Disable AC/Mains charging and turns on/off the charging led
 * respectively.
 **/
static int ab8500_charger_ac_en(struct ux500_charger *charger,
	int enable, int vset, int iset)
{
	int ret;
	int volt_index;
	int curr_index;
	int input_curr_index;
	u8 overshoot = 0;

	struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);

	if (enable) {
		/* Check if AC is connected */
		if (!di->ac.charger_connected) {
			dev_err(di->dev, "AC charger not connected\n");
			return -ENXIO;
		}

		/* Enable AC charging */
		dev_dbg(di->dev, "Enable AC: %dmV %dmA\n", vset, iset);

		/*
		 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
		 * will be triggered everytime we enable the VDD ADC supply.
		 * This will turn off charging for a short while.
		 * It can be avoided by having the supply on when
		 * there is a charger enabled. Normally the VDD ADC supply
		 * is enabled everytime a GPADC conversion is triggered. We will
		 * force it to be enabled from this driver to have
		 * the GPADC module independant of the AB8500 chargers
		 */
		if (!di->vddadc_en_ac) {
			ret = regulator_enable(di->regu);
			if (ret)
				dev_warn(di->dev,
					"Failed to enable regulator\n");
			else
				di->vddadc_en_ac = true;
		}

		/* Check if the requested voltage or current is valid */
		volt_index = ab8500_voltage_to_regval(vset);
		curr_index = ab8500_current_to_regval(di, iset);
		input_curr_index = ab8500_current_to_regval(di,
			di->bm->chg_params->ac_curr_max);
		if (volt_index < 0 || curr_index < 0 || input_curr_index < 0) {
			dev_err(di->dev,
				"Charger voltage or current too high, "
				"charging not started\n");
			return -ENXIO;
		}

		/* ChVoltLevel: maximum battery charging voltage */
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
		if (ret) {
			dev_err(di->dev, "%s write failed\n", __func__);
			return ret;
		}
		/* MainChInputCurr: current that can be drawn from the charger*/
		ret = ab8500_charger_set_main_in_curr(di,
			di->bm->chg_params->ac_curr_max);
		if (ret) {
			dev_err(di->dev, "%s Failed to set MainChInputCurr\n",
				__func__);
			return ret;
		}
		/* ChOutputCurentLevel: protected output current */
		ret = ab8500_charger_set_output_curr(di, iset);
		if (ret) {
			dev_err(di->dev, "%s "
				"Failed to set ChOutputCurentLevel\n",
				__func__);
			return ret;
		}

		/* Check if VBAT overshoot control should be enabled */
		if (!di->bm->enable_overshoot)
			overshoot = MAIN_CH_NO_OVERSHOOT_ENA_N;

		/* Enable Main Charger */
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_MCH_CTRL1, MAIN_CH_ENA | overshoot);
		if (ret) {
			dev_err(di->dev, "%s write failed\n", __func__);
			return ret;
		}

		/* Power on charging LED indication */
		ret = ab8500_charger_led_en(di, true);
		if (ret < 0)
			dev_err(di->dev, "failed to enable LED\n");

		di->ac.charger_online = 1;
	} else {
		/* Disable AC charging */
		if (is_ab8500_1p1_or_earlier(di->parent)) {
			/*
			 * For ABB revision 1.0 and 1.1 there is a bug in the
			 * watchdog logic. That means we have to continously
			 * kick the charger watchdog even when no charger is
			 * connected. This is only valid once the AC charger
			 * has been enabled. This is a bug that is not handled
			 * by the algorithm and the watchdog have to be kicked
			 * by the charger driver when the AC charger
			 * is disabled
			 */
			if (di->ac_conn) {
				queue_delayed_work(di->charger_wq,
					&di->kick_wd_work,
					round_jiffies(WD_KICK_INTERVAL));
			}

			/*
			 * We can't turn off charging completely
			 * due to a bug in AB8500 cut1.
			 * If we do, charging will not start again.
			 * That is why we set the lowest voltage
			 * and current possible
			 */
			ret = abx500_set_register_interruptible(di->dev,
				AB8500_CHARGER,
				AB8500_CH_VOLT_LVL_REG, CH_VOL_LVL_3P5);
			if (ret) {
				dev_err(di->dev,
					"%s write failed\n", __func__);
				return ret;
			}

			ret = ab8500_charger_set_output_curr(di, 0);
			if (ret) {
				dev_err(di->dev, "%s "
					"Failed to set ChOutputCurentLevel\n",
					__func__);
				return ret;
			}
		} else {
			ret = abx500_set_register_interruptible(di->dev,
				AB8500_CHARGER,
				AB8500_MCH_CTRL1, 0);
			if (ret) {
				dev_err(di->dev,
					"%s write failed\n", __func__);
				return ret;
			}
		}

		ret = ab8500_charger_led_en(di, false);
		if (ret < 0)
			dev_err(di->dev, "failed to disable LED\n");

		di->ac.charger_online = 0;
		di->ac.wd_expired = false;

		/* Disable regulator if enabled */
		if (di->vddadc_en_ac) {
			regulator_disable(di->regu);
			di->vddadc_en_ac = false;
		}

		dev_dbg(di->dev, "%s Disabled AC charging\n", __func__);
	}
	ab8500_power_supply_changed(di, di->ac_chg.psy);

	return ret;
}

/**
 * ab8500_charger_usb_en() - enable usb charging
 * @di:		pointer to the ab8500_charger structure
 * @enable:	enable/disable flag
 * @vset:	charging voltage
 * @ich_out:	charger output current
 *
 * Enable/Disable USB charging and turns on/off the charging led respectively.
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_usb_en(struct ux500_charger *charger,
	int enable, int vset, int ich_out)
{
	int ret;
	int volt_index;
	int curr_index;
	u8 overshoot = 0;

	struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);

	if (enable) {
		/* Check if USB is connected */
		if (!di->usb.charger_connected) {
			dev_err(di->dev, "USB charger not connected\n");
			return -ENXIO;
		}

		/*
		 * Due to a bug in AB8500, BTEMP_HIGH/LOW interrupts
		 * will be triggered everytime we enable the VDD ADC supply.
		 * This will turn off charging for a short while.
		 * It can be avoided by having the supply on when
		 * there is a charger enabled. Normally the VDD ADC supply
		 * is enabled everytime a GPADC conversion is triggered. We will
		 * force it to be enabled from this driver to have
		 * the GPADC module independant of the AB8500 chargers
		 */
		if (!di->vddadc_en_usb) {
			ret = regulator_enable(di->regu);
			if (ret)
				dev_warn(di->dev,
					"Failed to enable regulator\n");
			else
				di->vddadc_en_usb = true;
		}

		/* Enable USB charging */
		dev_dbg(di->dev, "Enable USB: %dmV %dmA\n", vset, ich_out);

		/* Check if the requested voltage or current is valid */
		volt_index = ab8500_voltage_to_regval(vset);
		curr_index = ab8500_current_to_regval(di, ich_out);
		if (volt_index < 0 || curr_index < 0) {
			dev_err(di->dev,
				"Charger voltage or current too high, "
				"charging not started\n");
			return -ENXIO;
		}

		/* ChVoltLevel: max voltage upto which battery can be charged */
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_CH_VOLT_LVL_REG, (u8) volt_index);
		if (ret) {
			dev_err(di->dev, "%s write failed\n", __func__);
			return ret;
		}
		/* Check if VBAT overshoot control should be enabled */
		if (!di->bm->enable_overshoot)
			overshoot = USB_CHG_NO_OVERSHOOT_ENA_N;

		/* Enable USB Charger */
		dev_dbg(di->dev,
			"Enabling USB with write to AB8500_USBCH_CTRL1_REG\n");
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_USBCH_CTRL1_REG, USB_CH_ENA | overshoot);
		if (ret) {
			dev_err(di->dev, "%s write failed\n", __func__);
			return ret;
		}

		/* If success power on charging LED indication */
		ret = ab8500_charger_led_en(di, true);
		if (ret < 0)
			dev_err(di->dev, "failed to enable LED\n");

		di->usb.charger_online = 1;

		/* USBChInputCurr: current that can be drawn from the usb */
		ret = ab8500_charger_set_vbus_in_curr(di,
					di->max_usb_in_curr.usb_type_max);
		if (ret) {
			dev_err(di->dev, "setting USBChInputCurr failed\n");
			return ret;
		}

		/* ChOutputCurentLevel: protected output current */
		ret = ab8500_charger_set_output_curr(di, ich_out);
		if (ret) {
			dev_err(di->dev, "%s "
				"Failed to set ChOutputCurentLevel\n",
				__func__);
			return ret;
		}

		queue_delayed_work(di->charger_wq, &di->check_vbat_work, HZ);

	} else {
		/* Disable USB charging */
		dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);
		ret = abx500_set_register_interruptible(di->dev,
			AB8500_CHARGER,
			AB8500_USBCH_CTRL1_REG, 0);
		if (ret) {
			dev_err(di->dev,
				"%s write failed\n", __func__);
			return ret;
		}

		ret = ab8500_charger_led_en(di, false);
		if (ret < 0)
			dev_err(di->dev, "failed to disable LED\n");
		/* USBChInputCurr: current that can be drawn from the usb */
		ret = ab8500_charger_set_vbus_in_curr(di, 0);
		if (ret) {
			dev_err(di->dev, "setting USBChInputCurr failed\n");
			return ret;
		}

		/* ChOutputCurentLevel: protected output current */
		ret = ab8500_charger_set_output_curr(di, 0);
		if (ret) {
			dev_err(di->dev, "%s "
				"Failed to reset ChOutputCurentLevel\n",
				__func__);
			return ret;
		}
		di->usb.charger_online = 0;
		di->usb.wd_expired = false;

		/* Disable regulator if enabled */
		if (di->vddadc_en_usb) {
			regulator_disable(di->regu);
			di->vddadc_en_usb = false;
		}

		dev_dbg(di->dev, "%s Disabled USB charging\n", __func__);

		/* Cancel any pending Vbat check work */
		cancel_delayed_work(&di->check_vbat_work);

	}
	ab8500_power_supply_changed(di, di->usb_chg.psy);

	return ret;
}

static int ab8500_external_charger_prepare(struct notifier_block *charger_nb,
				unsigned long event, void *data)
{
	int ret;
	struct device *dev = data;
	/*Toggle External charger control pin*/
	ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
				  AB8500_SYS_CHARGER_CONTROL_REG,
				  EXTERNAL_CHARGER_DISABLE_REG_VAL);
	if (ret < 0) {
		dev_err(dev, "write reg failed %d\n", ret);
		goto out;
	}
	ret = abx500_set_register_interruptible(dev, AB8500_SYS_CTRL1_BLOCK,
				  AB8500_SYS_CHARGER_CONTROL_REG,
				  EXTERNAL_CHARGER_ENABLE_REG_VAL);
	if (ret < 0)
		dev_err(dev, "Write reg failed %d\n", ret);

out:
	return ret;
}

/**
 * ab8500_charger_usb_check_enable() - enable usb charging
 * @charger:	pointer to the ux500_charger structure
 * @vset:	charging voltage
 * @iset:	charger output current
 *
 * Check if the VBUS charger has been disconnected and reconnected without
 * AB8500 rising an interrupt. Returns 0 on success.
 */
static int ab8500_charger_usb_check_enable(struct ux500_charger *charger,
	int vset, int iset)
{
	u8 usbch_ctrl1 = 0;
	int ret = 0;

	struct ab8500_charger *di = to_ab8500_charger_usb_device_info(charger);

	if (!di->usb.charger_connected)
		return ret;

	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
				AB8500_USBCH_CTRL1_REG, &usbch_ctrl1);
	if (ret < 0) {
		dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
		return ret;
	}
	dev_dbg(di->dev, "USB charger ctrl: 0x%02x\n", usbch_ctrl1);

	if (!(usbch_ctrl1 & USB_CH_ENA)) {
		dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");

		ret = abx500_mask_and_set_register_interruptible(di->dev,
					AB8500_CHARGER, AB8500_CHARGER_CTRL,
					DROP_COUNT_RESET, DROP_COUNT_RESET);
		if (ret < 0) {
			dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
			return ret;
		}

		ret = ab8500_charger_usb_en(&di->usb_chg, true, vset, iset);
		if (ret < 0) {
			dev_err(di->dev, "Failed to enable VBUS charger %d\n",
					__LINE__);
			return ret;
		}
	}
	return ret;
}

/**
 * ab8500_charger_ac_check_enable() - enable usb charging
 * @charger:	pointer to the ux500_charger structure
 * @vset:	charging voltage
 * @iset:	charger output current
 *
 * Check if the AC charger has been disconnected and reconnected without
 * AB8500 rising an interrupt. Returns 0 on success.
 */
static int ab8500_charger_ac_check_enable(struct ux500_charger *charger,
	int vset, int iset)
{
	u8 mainch_ctrl1 = 0;
	int ret = 0;

	struct ab8500_charger *di = to_ab8500_charger_ac_device_info(charger);

	if (!di->ac.charger_connected)
		return ret;

	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
				AB8500_MCH_CTRL1, &mainch_ctrl1);
	if (ret < 0) {
		dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
		return ret;
	}
	dev_dbg(di->dev, "AC charger ctrl: 0x%02x\n", mainch_ctrl1);

	if (!(mainch_ctrl1 & MAIN_CH_ENA)) {
		dev_info(di->dev, "Charging has been disabled abnormally and will be re-enabled\n");

		ret = abx500_mask_and_set_register_interruptible(di->dev,
					AB8500_CHARGER, AB8500_CHARGER_CTRL,
					DROP_COUNT_RESET, DROP_COUNT_RESET);

		if (ret < 0) {
			dev_err(di->dev, "ab8500 write failed %d\n", __LINE__);
			return ret;
		}

		ret = ab8500_charger_ac_en(&di->usb_chg, true, vset, iset);
		if (ret < 0) {
			dev_err(di->dev, "failed to enable AC charger %d\n",
				__LINE__);
			return ret;
		}
	}
	return ret;
}

/**
 * ab8500_charger_watchdog_kick() - kick charger watchdog
 * @di:		pointer to the ab8500_charger structure
 *
 * Kick charger watchdog
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_watchdog_kick(struct ux500_charger *charger)
{
	int ret;
	struct ab8500_charger *di;

	if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
		di = to_ab8500_charger_ac_device_info(charger);
	else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
		di = to_ab8500_charger_usb_device_info(charger);
	else
		return -ENXIO;

	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
		AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
	if (ret)
		dev_err(di->dev, "Failed to kick WD!\n");

	return ret;
}

/**
 * ab8500_charger_update_charger_current() - update charger current
 * @di:		pointer to the ab8500_charger structure
 *
 * Update the charger output current for the specified charger
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_update_charger_current(struct ux500_charger *charger,
		int ich_out)
{
	int ret;
	struct ab8500_charger *di;

	if (charger->psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
		di = to_ab8500_charger_ac_device_info(charger);
	else if (charger->psy->desc->type == POWER_SUPPLY_TYPE_USB)
		di = to_ab8500_charger_usb_device_info(charger);
	else
		return -ENXIO;

	ret = ab8500_charger_set_output_curr(di, ich_out);
	if (ret) {
		dev_err(di->dev, "%s "
			"Failed to set ChOutputCurentLevel\n",
			__func__);
		return ret;
	}

	/* Reset the main and usb drop input current measurement counter */
	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
				AB8500_CHARGER_CTRL, DROP_COUNT_RESET);
	if (ret) {
		dev_err(di->dev, "%s write failed\n", __func__);
		return ret;
	}

	return ret;
}

static int ab8500_charger_get_ext_psy_data(struct device *dev, void *data)
{
	struct power_supply *psy;
	struct power_supply *ext = dev_get_drvdata(dev);
	const char **supplicants = (const char **)ext->supplied_to;
	struct ab8500_charger *di;
	union power_supply_propval ret;
	int j;
	struct ux500_charger *usb_chg;

	usb_chg = (struct ux500_charger *)data;
	psy = usb_chg->psy;

	di = to_ab8500_charger_usb_device_info(usb_chg);

	/* For all psy where the driver name appears in any supplied_to */
	j = match_string(supplicants, ext->num_supplicants, psy->desc->name);
	if (j < 0)
		return 0;

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

		if (power_supply_get_property(ext, prop, &ret))
			continue;

		switch (prop) {
		case POWER_SUPPLY_PROP_VOLTAGE_NOW:
			switch (ext->desc->type) {
			case POWER_SUPPLY_TYPE_BATTERY:
				di->vbat = ret.intval / 1000;
				break;
			default:
				break;
			}
			break;
		default:
			break;
		}
	}
	return 0;
}

/**
 * ab8500_charger_check_vbat_work() - keep vbus current within spec
 * @work	pointer to the work_struct structure
 *
 * Due to a asic bug it is necessary to lower the input current to the vbus
 * charger when charging with at some specific levels. This issue is only valid
 * for below a certain battery voltage. This function makes sure that the
 * the allowed current limit isn't exceeded.
 */
static void ab8500_charger_check_vbat_work(struct work_struct *work)
{
	int t = 10;
	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, check_vbat_work.work);

	class_for_each_device(power_supply_class, NULL,
		di->usb_chg.psy, ab8500_charger_get_ext_psy_data);

	/* First run old_vbat is 0. */
	if (di->old_vbat == 0)
		di->old_vbat = di->vbat;

	if (!((di->old_vbat <= VBAT_TRESH_IP_CUR_RED &&
		di->vbat <= VBAT_TRESH_IP_CUR_RED) ||
		(di->old_vbat > VBAT_TRESH_IP_CUR_RED &&
		di->vbat > VBAT_TRESH_IP_CUR_RED))) {

		dev_dbg(di->dev, "Vbat did cross threshold, curr: %d, new: %d,"
			" old: %d\n", di->max_usb_in_curr.usb_type_max,
			di->vbat, di->old_vbat);
		ab8500_charger_set_vbus_in_curr(di,
					di->max_usb_in_curr.usb_type_max);
		power_supply_changed(di->usb_chg.psy);
	}

	di->old_vbat = di->vbat;

	/*
	 * No need to check the battery voltage every second when not close to
	 * the threshold.
	 */
	if (di->vbat < (VBAT_TRESH_IP_CUR_RED + 100) &&
		(di->vbat > (VBAT_TRESH_IP_CUR_RED - 100)))
			t = 1;

	queue_delayed_work(di->charger_wq, &di->check_vbat_work, t * HZ);
}

/**
 * ab8500_charger_check_hw_failure_work() - check main charger failure
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for checking the main charger status
 */
static void ab8500_charger_check_hw_failure_work(struct work_struct *work)
{
	int ret;
	u8 reg_value;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, check_hw_failure_work.work);

	/* Check if the status bits for HW failure is still active */
	if (di->flags.mainextchnotok) {
		ret = abx500_get_register_interruptible(di->dev,
			AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
		if (ret < 0) {
			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
			return;
		}
		if (!(reg_value & MAIN_CH_NOK)) {
			di->flags.mainextchnotok = false;
			ab8500_power_supply_changed(di, di->ac_chg.psy);
		}
	}
	if (di->flags.vbus_ovv) {
		ret = abx500_get_register_interruptible(di->dev,
			AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG,
			&reg_value);
		if (ret < 0) {
			dev_err(di->dev, "%s ab8500 read failed\n", __func__);
			return;
		}
		if (!(reg_value & VBUS_OVV_TH)) {
			di->flags.vbus_ovv = false;
			ab8500_power_supply_changed(di, di->usb_chg.psy);
		}
	}
	/* If we still have a failure, schedule a new check */
	if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
		queue_delayed_work(di->charger_wq,
			&di->check_hw_failure_work, round_jiffies(HZ));
	}
}

/**
 * ab8500_charger_kick_watchdog_work() - kick the watchdog
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for kicking the charger watchdog.
 *
 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
 * logic. That means we have to continously kick the charger
 * watchdog even when no charger is connected. This is only
 * valid once the AC charger has been enabled. This is
 * a bug that is not handled by the algorithm and the
 * watchdog have to be kicked by the charger driver
 * when the AC charger is disabled
 */
static void ab8500_charger_kick_watchdog_work(struct work_struct *work)
{
	int ret;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, kick_wd_work.work);

	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
		AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
	if (ret)
		dev_err(di->dev, "Failed to kick WD!\n");

	/* Schedule a new watchdog kick */
	queue_delayed_work(di->charger_wq,
		&di->kick_wd_work, round_jiffies(WD_KICK_INTERVAL));
}

/**
 * ab8500_charger_ac_work() - work to get and set main charger status
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for checking the main charger status
 */
static void ab8500_charger_ac_work(struct work_struct *work)
{
	int ret;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, ac_work);

	/*
	 * Since we can't be sure that the events are received
	 * synchronously, we have the check if the main charger is
	 * connected by reading the status register
	 */
	ret = ab8500_charger_detect_chargers(di, false);
	if (ret < 0)
		return;

	if (ret & AC_PW_CONN) {
		di->ac.charger_connected = 1;
		di->ac_conn = true;
	} else {
		di->ac.charger_connected = 0;
	}

	ab8500_power_supply_changed(di, di->ac_chg.psy);
	sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
}

static void ab8500_charger_usb_attached_work(struct work_struct *work)
{
	struct ab8500_charger *di = container_of(work,
						 struct ab8500_charger,
						 usb_charger_attached_work.work);
	int usbch = (USB_CH_VBUSDROP | USB_CH_VBUSDETDBNC);
	int ret, i;
	u8 statval;

	for (i = 0; i < 10; i++) {
		ret = abx500_get_register_interruptible(di->dev,
							AB8500_CHARGER,
							AB8500_CH_USBCH_STAT1_REG,
							&statval);
		if (ret < 0) {
			dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
			goto reschedule;
		}
		if ((statval & usbch) != usbch)
			goto reschedule;

		msleep(CHARGER_STATUS_POLL);
	}

	ab8500_charger_usb_en(&di->usb_chg, 0, 0, 0);

	mutex_lock(&di->charger_attached_mutex);
	mutex_unlock(&di->charger_attached_mutex);

	return;

reschedule:
	queue_delayed_work(di->charger_wq,
			   &di->usb_charger_attached_work,
			   HZ);
}

static void ab8500_charger_ac_attached_work(struct work_struct *work)
{

	struct ab8500_charger *di = container_of(work,
						 struct ab8500_charger,
						 ac_charger_attached_work.work);
	int mainch = (MAIN_CH_STATUS2_MAINCHGDROP |
		      MAIN_CH_STATUS2_MAINCHARGERDETDBNC);
	int ret, i;
	u8 statval;

	for (i = 0; i < 10; i++) {
		ret = abx500_get_register_interruptible(di->dev,
							AB8500_CHARGER,
							AB8500_CH_STATUS2_REG,
							&statval);
		if (ret < 0) {
			dev_err(di->dev, "ab8500 read failed %d\n", __LINE__);
			goto reschedule;
		}

		if ((statval & mainch) != mainch)
			goto reschedule;

		msleep(CHARGER_STATUS_POLL);
	}

	ab8500_charger_ac_en(&di->ac_chg, 0, 0, 0);
	queue_work(di->charger_wq, &di->ac_work);

	mutex_lock(&di->charger_attached_mutex);
	mutex_unlock(&di->charger_attached_mutex);

	return;

reschedule:
	queue_delayed_work(di->charger_wq,
			   &di->ac_charger_attached_work,
			   HZ);
}

/**
 * ab8500_charger_detect_usb_type_work() - work to detect USB type
 * @work:	Pointer to the work_struct structure
 *
 * Detect the type of USB plugged
 */
static void ab8500_charger_detect_usb_type_work(struct work_struct *work)
{
	int ret;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, detect_usb_type_work);

	/*
	 * Since we can't be sure that the events are received
	 * synchronously, we have the check if is
	 * connected by reading the status register
	 */
	ret = ab8500_charger_detect_chargers(di, false);
	if (ret < 0)
		return;

	if (!(ret & USB_PW_CONN)) {
		dev_dbg(di->dev, "%s di->vbus_detected = false\n", __func__);
		di->vbus_detected = false;
		ab8500_charger_set_usb_connected(di, false);
		ab8500_power_supply_changed(di, di->usb_chg.psy);
	} else {
		dev_dbg(di->dev, "%s di->vbus_detected = true\n", __func__);
		di->vbus_detected = true;

		if (is_ab8500_1p1_or_earlier(di->parent)) {
			ret = ab8500_charger_detect_usb_type(di);
			if (!ret) {
				ab8500_charger_set_usb_connected(di, true);
				ab8500_power_supply_changed(di,
							    di->usb_chg.psy);
			}
		} else {
			/*
			 * For ABB cut2.0 and onwards we have an IRQ,
			 * USB_LINK_STATUS that will be triggered when the USB
			 * link status changes. The exception is USB connected
			 * during startup. Then we don't get a
			 * USB_LINK_STATUS IRQ
			 */
			if (di->vbus_detected_start) {
				di->vbus_detected_start = false;
				ret = ab8500_charger_detect_usb_type(di);
				if (!ret) {
					ab8500_charger_set_usb_connected(di,
						true);
					ab8500_power_supply_changed(di,
						di->usb_chg.psy);
				}
			}
		}
	}
}

/**
 * ab8500_charger_usb_link_attach_work() - work to detect USB type
 * @work:	pointer to the work_struct structure
 *
 * Detect the type of USB plugged
 */
static void ab8500_charger_usb_link_attach_work(struct work_struct *work)
{
	struct ab8500_charger *di =
		container_of(work, struct ab8500_charger, attach_work.work);
	int ret;

	/* Update maximum input current if USB enumeration is not detected */
	if (!di->usb.charger_online) {
		ret = ab8500_charger_set_vbus_in_curr(di,
					di->max_usb_in_curr.usb_type_max);
		if (ret)
			return;
	}

	ab8500_charger_set_usb_connected(di, true);
	ab8500_power_supply_changed(di, di->usb_chg.psy);
}

/**
 * ab8500_charger_usb_link_status_work() - work to detect USB type
 * @work:	pointer to the work_struct structure
 *
 * Detect the type of USB plugged
 */
static void ab8500_charger_usb_link_status_work(struct work_struct *work)
{
	int detected_chargers;
	int ret;
	u8 val;
	u8 link_status;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, usb_link_status_work);

	/*
	 * Since we can't be sure that the events are received
	 * synchronously, we have the check if  is
	 * connected by reading the status register
	 */
	detected_chargers = ab8500_charger_detect_chargers(di, false);
	if (detected_chargers < 0)
		return;

	/*
	 * Some chargers that breaks the USB spec is
	 * identified as invalid by AB8500 and it refuse
	 * to start the charging process. but by jumping
	 * thru a few hoops it can be forced to start.
	 */
	if (is_ab8500(di->parent))
		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
					AB8500_USB_LINE_STAT_REG, &val);
	else
		ret = abx500_get_register_interruptible(di->dev, AB8500_USB,
					AB8500_USB_LINK1_STAT_REG, &val);

	if (ret >= 0)
		dev_dbg(di->dev, "UsbLineStatus register = 0x%02x\n", val);
	else
		dev_dbg(di->dev, "Error reading USB link status\n");

	if (is_ab8500(di->parent))
		link_status = AB8500_USB_LINK_STATUS;
	else
		link_status = AB8505_USB_LINK_STATUS;

	if (detected_chargers & USB_PW_CONN) {
		if (((val & link_status) >> USB_LINK_STATUS_SHIFT) ==
				USB_STAT_NOT_VALID_LINK &&
				di->invalid_charger_detect_state == 0) {
			dev_dbg(di->dev,
					"Invalid charger detected, state= 0\n");
			/*Enable charger*/
			abx500_mask_and_set_register_interruptible(di->dev,
					AB8500_CHARGER, AB8500_USBCH_CTRL1_REG,
					USB_CH_ENA, USB_CH_ENA);
			/*Enable charger detection*/
			abx500_mask_and_set_register_interruptible(di->dev,
					AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
					USB_CH_DET, USB_CH_DET);
			di->invalid_charger_detect_state = 1;
			/*exit and wait for new link status interrupt.*/
			return;

		}
		if (di->invalid_charger_detect_state == 1) {
			dev_dbg(di->dev,
					"Invalid charger detected, state= 1\n");
			/*Stop charger detection*/
			abx500_mask_and_set_register_interruptible(di->dev,
					AB8500_USB, AB8500_USB_LINE_CTRL2_REG,
					USB_CH_DET, 0x00);
			/*Check link status*/
			if (is_ab8500(di->parent))
				ret = abx500_get_register_interruptible(di->dev,
					AB8500_USB, AB8500_USB_LINE_STAT_REG,
					&val);
			else
				ret = abx500_get_register_interruptible(di->dev,
					AB8500_USB, AB8500_USB_LINK1_STAT_REG,
					&val);

			dev_dbg(di->dev, "USB link status= 0x%02x\n",
				(val & link_status) >> USB_LINK_STATUS_SHIFT);
			di->invalid_charger_detect_state = 2;
		}
	} else {
		di->invalid_charger_detect_state = 0;
	}

	if (!(detected_chargers & USB_PW_CONN)) {
		di->vbus_detected = false;
		ab8500_charger_set_usb_connected(di, false);
		ab8500_power_supply_changed(di, di->usb_chg.psy);
		return;
	}

	dev_dbg(di->dev,"%s di->vbus_detected = true\n",__func__);
	di->vbus_detected = true;
	ret = ab8500_charger_read_usb_type(di);
	if (ret) {
		if (ret == -ENXIO) {
			/* No valid charger type detected */
			ab8500_charger_set_usb_connected(di, false);
			ab8500_power_supply_changed(di, di->usb_chg.psy);
		}
		return;
	}

	if (di->usb_device_is_unrecognised) {
		dev_dbg(di->dev,
			"Potential Legacy Charger device. "
			"Delay work for %d msec for USB enum "
			"to finish",
			WAIT_ACA_RID_ENUMERATION);
		queue_delayed_work(di->charger_wq,
				   &di->attach_work,
				   msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
	} else if (di->is_aca_rid == 1) {
		/* Only wait once */
		di->is_aca_rid++;
		dev_dbg(di->dev,
			"%s Wait %d msec for USB enum to finish",
			__func__, WAIT_ACA_RID_ENUMERATION);
		queue_delayed_work(di->charger_wq,
				   &di->attach_work,
				   msecs_to_jiffies(WAIT_ACA_RID_ENUMERATION));
	} else {
		queue_delayed_work(di->charger_wq,
				   &di->attach_work,
				   0);
	}
}

static void ab8500_charger_usb_state_changed_work(struct work_struct *work)
{
	int ret;
	unsigned long flags;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, usb_state_changed_work.work);

	if (!di->vbus_detected)	{
		dev_dbg(di->dev,
			"%s !di->vbus_detected\n",
			__func__);
		return;
	}

	spin_lock_irqsave(&di->usb_state.usb_lock, flags);
	di->usb_state.state = di->usb_state.state_tmp;
	di->usb_state.usb_current = di->usb_state.usb_current_tmp;
	spin_unlock_irqrestore(&di->usb_state.usb_lock, flags);

	dev_dbg(di->dev, "%s USB state: 0x%02x mA: %d\n",
		__func__, di->usb_state.state, di->usb_state.usb_current);

	switch (di->usb_state.state) {
	case AB8500_BM_USB_STATE_RESET_HS:
	case AB8500_BM_USB_STATE_RESET_FS:
	case AB8500_BM_USB_STATE_SUSPEND:
	case AB8500_BM_USB_STATE_MAX:
		ab8500_charger_set_usb_connected(di, false);
		ab8500_power_supply_changed(di, di->usb_chg.psy);
		break;

	case AB8500_BM_USB_STATE_RESUME:
		/*
		 * when suspend->resume there should be delay
		 * of 1sec for enabling charging
		 */
		msleep(1000);
		/* Intentional fall through */
	case AB8500_BM_USB_STATE_CONFIGURED:
		/*
		 * USB is configured, enable charging with the charging
		 * input current obtained from USB driver
		 */
		if (!ab8500_charger_get_usb_cur(di)) {
			/* Update maximum input current */
			ret = ab8500_charger_set_vbus_in_curr(di,
					di->max_usb_in_curr.usb_type_max);
			if (ret)
				return;

			ab8500_charger_set_usb_connected(di, true);
			ab8500_power_supply_changed(di, di->usb_chg.psy);
		}
		break;

	default:
		break;
	};
}

/**
 * ab8500_charger_check_usbchargernotok_work() - check USB chg not ok status
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for checking the USB charger Not OK status
 */
static void ab8500_charger_check_usbchargernotok_work(struct work_struct *work)
{
	int ret;
	u8 reg_value;
	bool prev_status;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, check_usbchgnotok_work.work);

	/* Check if the status bit for usbchargernotok is still active */
	ret = abx500_get_register_interruptible(di->dev,
		AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return;
	}
	prev_status = di->flags.usbchargernotok;

	if (reg_value & VBUS_CH_NOK) {
		di->flags.usbchargernotok = true;
		/* Check again in 1sec */
		queue_delayed_work(di->charger_wq,
			&di->check_usbchgnotok_work, HZ);
	} else {
		di->flags.usbchargernotok = false;
		di->flags.vbus_collapse = false;
	}

	if (prev_status != di->flags.usbchargernotok)
		ab8500_power_supply_changed(di, di->usb_chg.psy);
}

/**
 * ab8500_charger_check_main_thermal_prot_work() - check main thermal status
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for checking the Main thermal prot status
 */
static void ab8500_charger_check_main_thermal_prot_work(
	struct work_struct *work)
{
	int ret;
	u8 reg_value;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, check_main_thermal_prot_work);

	/* Check if the status bit for main_thermal_prot is still active */
	ret = abx500_get_register_interruptible(di->dev,
		AB8500_CHARGER, AB8500_CH_STATUS2_REG, &reg_value);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return;
	}
	if (reg_value & MAIN_CH_TH_PROT)
		di->flags.main_thermal_prot = true;
	else
		di->flags.main_thermal_prot = false;

	ab8500_power_supply_changed(di, di->ac_chg.psy);
}

/**
 * ab8500_charger_check_usb_thermal_prot_work() - check usb thermal status
 * @work:	pointer to the work_struct structure
 *
 * Work queue function for checking the USB thermal prot status
 */
static void ab8500_charger_check_usb_thermal_prot_work(
	struct work_struct *work)
{
	int ret;
	u8 reg_value;

	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, check_usb_thermal_prot_work);

	/* Check if the status bit for usb_thermal_prot is still active */
	ret = abx500_get_register_interruptible(di->dev,
		AB8500_CHARGER, AB8500_CH_USBCH_STAT2_REG, &reg_value);
	if (ret < 0) {
		dev_err(di->dev, "%s ab8500 read failed\n", __func__);
		return;
	}
	if (reg_value & USB_CH_TH_PROT)
		di->flags.usb_thermal_prot = true;
	else
		di->flags.usb_thermal_prot = false;

	ab8500_power_supply_changed(di, di->usb_chg.psy);
}

/**
 * ab8500_charger_mainchunplugdet_handler() - main charger unplugged
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_mainchunplugdet_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "Main charger unplugged\n");
	queue_work(di->charger_wq, &di->ac_work);

	cancel_delayed_work_sync(&di->ac_charger_attached_work);
	mutex_lock(&di->charger_attached_mutex);
	mutex_unlock(&di->charger_attached_mutex);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_mainchplugdet_handler() - main charger plugged
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_mainchplugdet_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "Main charger plugged\n");
	queue_work(di->charger_wq, &di->ac_work);

	mutex_lock(&di->charger_attached_mutex);
	mutex_unlock(&di->charger_attached_mutex);

	if (is_ab8500(di->parent))
		queue_delayed_work(di->charger_wq,
			   &di->ac_charger_attached_work,
			   HZ);
	return IRQ_HANDLED;
}

/**
 * ab8500_charger_mainextchnotok_handler() - main charger not ok
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_mainextchnotok_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "Main charger not ok\n");
	di->flags.mainextchnotok = true;
	ab8500_power_supply_changed(di, di->ac_chg.psy);

	/* Schedule a new HW failure check */
	queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_mainchthprotr_handler() - Die temp is above main charger
 * thermal protection threshold
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_mainchthprotr_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev,
		"Die temp above Main charger thermal protection threshold\n");
	queue_work(di->charger_wq, &di->check_main_thermal_prot_work);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_mainchthprotf_handler() - Die temp is below main charger
 * thermal protection threshold
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_mainchthprotf_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev,
		"Die temp ok for Main charger thermal protection threshold\n");
	queue_work(di->charger_wq, &di->check_main_thermal_prot_work);

	return IRQ_HANDLED;
}

static void ab8500_charger_vbus_drop_end_work(struct work_struct *work)
{
	struct ab8500_charger *di = container_of(work,
		struct ab8500_charger, vbus_drop_end_work.work);
	int ret, curr;
	u8 reg_value;

	di->flags.vbus_drop_end = false;

	/* Reset the drop counter */
	abx500_set_register_interruptible(di->dev,
				  AB8500_CHARGER, AB8500_CHARGER_CTRL, 0x01);

	ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_CH_USBCH_STAT2_REG, &reg_value);
	if (ret < 0) {
		dev_err(di->dev, "%s read failed\n", __func__);
		return;
	}

	curr = di->bm->chg_input_curr[
		reg_value >> AUTO_VBUS_IN_CURR_LIM_SHIFT];

	if (di->max_usb_in_curr.calculated_max != curr) {
		/* USB source is collapsing */
		di->max_usb_in_curr.calculated_max = curr;
		dev_dbg(di->dev,
			 "VBUS input current limiting to %d mA\n",
			 di->max_usb_in_curr.calculated_max);
	} else {
		/*
		 * USB source can not give more than this amount.
		 * Taking more will collapse the source.
		 */
		di->max_usb_in_curr.set_max =
			di->max_usb_in_curr.calculated_max;
		dev_dbg(di->dev,
			 "VBUS input current limited to %d mA\n",
			 di->max_usb_in_curr.set_max);
	}

	if (di->usb.charger_connected)
		ab8500_charger_set_vbus_in_curr(di,
					di->max_usb_in_curr.usb_type_max);
}

/**
 * ab8500_charger_vbusdetf_handler() - VBUS falling detected
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_vbusdetf_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	di->vbus_detected = false;
	dev_dbg(di->dev, "VBUS falling detected\n");
	queue_work(di->charger_wq, &di->detect_usb_type_work);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_vbusdetr_handler() - VBUS rising detected
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_vbusdetr_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	di->vbus_detected = true;
	dev_dbg(di->dev, "VBUS rising detected\n");

	queue_work(di->charger_wq, &di->detect_usb_type_work);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_usblinkstatus_handler() - USB link status has changed
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_usblinkstatus_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "USB link status changed\n");

	queue_work(di->charger_wq, &di->usb_link_status_work);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_usbchthprotr_handler() - Die temp is above usb charger
 * thermal protection threshold
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_usbchthprotr_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev,
		"Die temp above USB charger thermal protection threshold\n");
	queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_usbchthprotf_handler() - Die temp is below usb charger
 * thermal protection threshold
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_usbchthprotf_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev,
		"Die temp ok for USB charger thermal protection threshold\n");
	queue_work(di->charger_wq, &di->check_usb_thermal_prot_work);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_usbchargernotokr_handler() - USB charger not ok detected
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_usbchargernotokr_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "Not allowed USB charger detected\n");
	queue_delayed_work(di->charger_wq, &di->check_usbchgnotok_work, 0);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_chwdexp_handler() - Charger watchdog expired
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_chwdexp_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "Charger watchdog expired\n");

	/*
	 * The charger that was online when the watchdog expired
	 * needs to be restarted for charging to start again
	 */
	if (di->ac.charger_online) {
		di->ac.wd_expired = true;
		ab8500_power_supply_changed(di, di->ac_chg.psy);
	}
	if (di->usb.charger_online) {
		di->usb.wd_expired = true;
		ab8500_power_supply_changed(di, di->usb_chg.psy);
	}

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_vbuschdropend_handler() - VBUS drop removed
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_vbuschdropend_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "VBUS charger drop ended\n");
	di->flags.vbus_drop_end = true;

	/*
	 * VBUS might have dropped due to bad connection.
	 * Schedule a new input limit set to the value SW requests.
	 */
	queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work,
			   round_jiffies(VBUS_IN_CURR_LIM_RETRY_SET_TIME * HZ));

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_vbusovv_handler() - VBUS overvoltage detected
 * @irq:       interrupt number
 * @_di:       pointer to the ab8500_charger structure
 *
 * Returns IRQ status(IRQ_HANDLED)
 */
static irqreturn_t ab8500_charger_vbusovv_handler(int irq, void *_di)
{
	struct ab8500_charger *di = _di;

	dev_dbg(di->dev, "VBUS overvoltage detected\n");
	di->flags.vbus_ovv = true;
	ab8500_power_supply_changed(di, di->usb_chg.psy);

	/* Schedule a new HW failure check */
	queue_delayed_work(di->charger_wq, &di->check_hw_failure_work, 0);

	return IRQ_HANDLED;
}

/**
 * ab8500_charger_ac_get_property() - get the ac/mains 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 ac/mains
 * properties by reading the sysfs files.
 * AC/Mains properties are online, present and voltage.
 * online:     ac/mains charging is in progress or not
 * present:    presence of the ac/mains
 * voltage:    AC/Mains voltage
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_ac_get_property(struct power_supply *psy,
	enum power_supply_property psp,
	union power_supply_propval *val)
{
	struct ab8500_charger *di;
	int ret;

	di = to_ab8500_charger_ac_device_info(psy_to_ux500_charger(psy));

	switch (psp) {
	case POWER_SUPPLY_PROP_HEALTH:
		if (di->flags.mainextchnotok)
			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
		else if (di->ac.wd_expired || di->usb.wd_expired)
			val->intval = POWER_SUPPLY_HEALTH_DEAD;
		else if (di->flags.main_thermal_prot)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = di->ac.charger_online;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = di->ac.charger_connected;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		ret = ab8500_charger_get_ac_voltage(di);
		if (ret >= 0)
			di->ac.charger_voltage = ret;
		/* On error, use previous value */
		val->intval = di->ac.charger_voltage * 1000;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
		/*
		 * This property is used to indicate when CV mode is entered
		 * for the AC charger
		 */
		di->ac.cv_active = ab8500_charger_ac_cv(di);
		val->intval = di->ac.cv_active;
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		ret = ab8500_charger_get_ac_current(di);
		if (ret >= 0)
			di->ac.charger_current = ret;
		val->intval = di->ac.charger_current * 1000;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/**
 * ab8500_charger_usb_get_property() - get the usb 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 usb
 * properties by reading the sysfs files.
 * USB properties are online, present and voltage.
 * online:     usb charging is in progress or not
 * present:    presence of the usb
 * voltage:    vbus voltage
 * Returns error code in case of failure else 0(on success)
 */
static int ab8500_charger_usb_get_property(struct power_supply *psy,
	enum power_supply_property psp,
	union power_supply_propval *val)
{
	struct ab8500_charger *di;
	int ret;

	di = to_ab8500_charger_usb_device_info(psy_to_ux500_charger(psy));

	switch (psp) {
	case POWER_SUPPLY_PROP_HEALTH:
		if (di->flags.usbchargernotok)
			val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
		else if (di->ac.wd_expired || di->usb.wd_expired)
			val->intval = POWER_SUPPLY_HEALTH_DEAD;
		else if (di->flags.usb_thermal_prot)
			val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
		else if (di->flags.vbus_ovv)
			val->intval = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
		else
			val->intval = POWER_SUPPLY_HEALTH_GOOD;
		break;
	case POWER_SUPPLY_PROP_ONLINE:
		val->intval = di->usb.charger_online;
		break;
	case POWER_SUPPLY_PROP_PRESENT:
		val->intval = di->usb.charger_connected;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
		ret = ab8500_charger_get_vbus_voltage(di);
		if (ret >= 0)
			di->usb.charger_voltage = ret;
		val->intval = di->usb.charger_voltage * 1000;
		break;
	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
		/*
		 * This property is used to indicate when CV mode is entered
		 * for the USB charger
		 */
		di->usb.cv_active = ab8500_charger_usb_cv(di);
		val->intval = di->usb.cv_active;
		break;
	case POWER_SUPPLY_PROP_CURRENT_NOW:
		ret = ab8500_charger_get_usb_current(di);
		if (ret >= 0)
			di->usb.charger_current = ret;
		val->intval = di->usb.charger_current * 1000;
		break;
	case POWER_SUPPLY_PROP_CURRENT_AVG:
		/*
		 * This property is used to indicate when VBUS has collapsed
		 * due to too high output current from the USB charger
		 */
		if (di->flags.vbus_collapse)
			val->intval = 1;
		else
			val->intval = 0;
		break;
	default:
		return -EINVAL;
	}
	return 0;
}

/**
 * ab8500_charger_init_hw_registers() - Set up charger related registers
 * @di:		pointer to the ab8500_charger structure
 *
 * Set up charger OVV, watchdog and maximum voltage registers as well as
 * charging of the backup battery
 */
static int ab8500_charger_init_hw_registers(struct ab8500_charger *di)
{
	int ret = 0;
	u8 bup_vch_range = 0, vbup33_vrtcn = 0;

	/* Setup maximum charger current and voltage for ABB cut2.0 */
	if (!is_ab8500_1p1_or_earlier(di->parent)) {
		ret = abx500_set_register_interruptible(di->dev,
			AB8500_CHARGER,
			AB8500_CH_VOLT_LVL_MAX_REG, CH_VOL_LVL_4P6);
		if (ret) {
			dev_err(di->dev,
				"failed to set CH_VOLT_LVL_MAX_REG\n");
			goto out;
		}

		ret = abx500_set_register_interruptible(di->dev,
			AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
			CH_OP_CUR_LVL_1P6);
		if (ret) {
			dev_err(di->dev,
				"failed to set CH_OPT_CRNTLVL_MAX_REG\n");
			goto out;
		}
	}

	if (is_ab8505_2p0(di->parent))
		ret = abx500_mask_and_set_register_interruptible(di->dev,
			AB8500_CHARGER,
			AB8500_USBCH_CTRL2_REG,
			VBUS_AUTO_IN_CURR_LIM_ENA,
			VBUS_AUTO_IN_CURR_LIM_ENA);
	else
		/*
		 * VBUS OVV set to 6.3V and enable automatic current limitation
		 */
		ret = abx500_set_register_interruptible(di->dev,
			AB8500_CHARGER,
			AB8500_USBCH_CTRL2_REG,
			VBUS_OVV_SELECT_6P3V | VBUS_AUTO_IN_CURR_LIM_ENA);
	if (ret) {
		dev_err(di->dev,
			"failed to set automatic current limitation\n");
		goto out;
	}

	/* Enable main watchdog in OTP */
	ret = abx500_set_register_interruptible(di->dev,
		AB8500_OTP_EMUL, AB8500_OTP_CONF_15, OTP_ENABLE_WD);
	if (ret) {
		dev_err(di->dev, "failed to enable main WD in OTP\n");
		goto out;
	}

	/* Enable main watchdog */
	ret = abx500_set_register_interruptible(di->dev,
		AB8500_SYS_CTRL2_BLOCK,
		AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_ENA);
	if (ret) {
		dev_err(di->dev, "failed to enable main watchdog\n");
		goto out;
	}

	/*
	 * Due to internal synchronisation, Enable and Kick watchdog bits
	 * cannot be enabled in a single write.
	 * A minimum delay of 2*32 kHz period (62.5µs) must be inserted
	 * between writing Enable then Kick bits.
	 */
	udelay(63);

	/* Kick main watchdog */
	ret = abx500_set_register_interruptible(di->dev,
		AB8500_SYS_CTRL2_BLOCK,
		AB8500_MAIN_WDOG_CTRL_REG,
		(MAIN_WDOG_ENA | MAIN_WDOG_KICK));
	if (ret) {
		dev_err(di->dev, "failed to kick main watchdog\n");
		goto out;
	}

	/* Disable main watchdog */
	ret = abx500_set_register_interruptible(di->dev,
		AB8500_SYS_CTRL2_BLOCK,
		AB8500_MAIN_WDOG_CTRL_REG, MAIN_WDOG_DIS);
	if (ret) {
		dev_err(di->dev, "failed to disable main watchdog\n");
		goto out;
	}

	/* Set watchdog timeout */
	ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
		AB8500_CH_WD_TIMER_REG, WD_TIMER);
	if (ret) {
		dev_err(di->dev, "failed to set charger watchdog timeout\n");
		goto out;
	}

	ret = ab8500_charger_led_en(di, false);
	if (ret < 0) {
		dev_err(di->dev, "failed to disable LED\n");
		goto out;
	}

	/* Backup battery voltage and current */
	if (di->bm->bkup_bat_v > BUP_VCH_SEL_3P1V)
		bup_vch_range = BUP_VCH_RANGE;
	if (di->bm->bkup_bat_v == BUP_VCH_SEL_3P3V)
		vbup33_vrtcn = VBUP33_VRTCN;

	ret = abx500_set_register_interruptible(di->dev,
		AB8500_RTC,
		AB8500_RTC_BACKUP_CHG_REG,
		(di->bm->bkup_bat_v & 0x3) | di->bm->bkup_bat_i);
	if (ret) {
		dev_err(di->dev, "failed to setup backup battery charging\n");
		goto out;
	}

	/* Enable backup battery charging */
	ret = abx500_mask_and_set_register_interruptible(di->dev,
		AB8500_RTC, AB8500_RTC_CTRL_REG,
		RTC_BUP_CH_ENA, RTC_BUP_CH_ENA);
	if (ret < 0) {
		dev_err(di->dev, "%s mask and set failed\n", __func__);
		goto out;
	}

out:
	return ret;
}

/*
 * ab8500 charger driver interrupts and their respective isr
 */
static struct ab8500_charger_interrupts ab8500_charger_irq[] = {
	{"MAIN_CH_UNPLUG_DET", ab8500_charger_mainchunplugdet_handler},
	{"MAIN_CHARGE_PLUG_DET", ab8500_charger_mainchplugdet_handler},
	{"MAIN_EXT_CH_NOT_OK", ab8500_charger_mainextchnotok_handler},
	{"MAIN_CH_TH_PROT_R", ab8500_charger_mainchthprotr_handler},
	{"MAIN_CH_TH_PROT_F", ab8500_charger_mainchthprotf_handler},
	{"VBUS_DET_F", ab8500_charger_vbusdetf_handler},
	{"VBUS_DET_R", ab8500_charger_vbusdetr_handler},
	{"USB_LINK_STATUS", ab8500_charger_usblinkstatus_handler},
	{"USB_CH_TH_PROT_R", ab8500_charger_usbchthprotr_handler},
	{"USB_CH_TH_PROT_F", ab8500_charger_usbchthprotf_handler},
	{"USB_CHARGER_NOT_OKR", ab8500_charger_usbchargernotokr_handler},
	{"VBUS_OVV", ab8500_charger_vbusovv_handler},
	{"CH_WD_EXP", ab8500_charger_chwdexp_handler},
	{"VBUS_CH_DROP_END", ab8500_charger_vbuschdropend_handler},
};

static int ab8500_charger_usb_notifier_call(struct notifier_block *nb,
		unsigned long event, void *power)
{
	struct ab8500_charger *di =
		container_of(nb, struct ab8500_charger, nb);
	enum ab8500_usb_state bm_usb_state;
	unsigned mA = *((unsigned *)power);

	if (!di)
		return NOTIFY_DONE;

	if (event != USB_EVENT_VBUS) {
		dev_dbg(di->dev, "not a standard host, returning\n");
		return NOTIFY_DONE;
	}

	/* TODO: State is fabricate  here. See if charger really needs USB
	 * state or if mA is enough
	 */
	if ((di->usb_state.usb_current == 2) && (mA > 2))
		bm_usb_state = AB8500_BM_USB_STATE_RESUME;
	else if (mA == 0)
		bm_usb_state = AB8500_BM_USB_STATE_RESET_HS;
	else if (mA == 2)
		bm_usb_state = AB8500_BM_USB_STATE_SUSPEND;
	else if (mA >= 8) /* 8, 100, 500 */
		bm_usb_state = AB8500_BM_USB_STATE_CONFIGURED;
	else /* Should never occur */
		bm_usb_state = AB8500_BM_USB_STATE_RESET_FS;

	dev_dbg(di->dev, "%s usb_state: 0x%02x mA: %d\n",
		__func__, bm_usb_state, mA);

	spin_lock(&di->usb_state.usb_lock);
	di->usb_state.state_tmp = bm_usb_state;
	di->usb_state.usb_current_tmp = mA;
	spin_unlock(&di->usb_state.usb_lock);

	/*
	 * wait for some time until you get updates from the usb stack
	 * and negotiations are completed
	 */
	queue_delayed_work(di->charger_wq, &di->usb_state_changed_work, HZ/2);

	return NOTIFY_OK;
}

#if defined(CONFIG_PM)
static int ab8500_charger_resume(struct platform_device *pdev)
{
	int ret;
	struct ab8500_charger *di = platform_get_drvdata(pdev);

	/*
	 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
	 * logic. That means we have to continously kick the charger
	 * watchdog even when no charger is connected. This is only
	 * valid once the AC charger has been enabled. This is
	 * a bug that is not handled by the algorithm and the
	 * watchdog have to be kicked by the charger driver
	 * when the AC charger is disabled
	 */
	if (di->ac_conn && is_ab8500_1p1_or_earlier(di->parent)) {
		ret = abx500_set_register_interruptible(di->dev, AB8500_CHARGER,
			AB8500_CHARG_WD_CTRL, CHARG_WD_KICK);
		if (ret)
			dev_err(di->dev, "Failed to kick WD!\n");

		/* If not already pending start a new timer */
		queue_delayed_work(di->charger_wq, &di->kick_wd_work,
				   round_jiffies(WD_KICK_INTERVAL));
	}

	/* If we still have a HW failure, schedule a new check */
	if (di->flags.mainextchnotok || di->flags.vbus_ovv) {
		queue_delayed_work(di->charger_wq,
			&di->check_hw_failure_work, 0);
	}

	if (di->flags.vbus_drop_end)
		queue_delayed_work(di->charger_wq, &di->vbus_drop_end_work, 0);

	return 0;
}

static int ab8500_charger_suspend(struct platform_device *pdev,
	pm_message_t state)
{
	struct ab8500_charger *di = platform_get_drvdata(pdev);

	/* Cancel any pending jobs */
	cancel_delayed_work(&di->check_hw_failure_work);
	cancel_delayed_work(&di->vbus_drop_end_work);

	flush_delayed_work(&di->attach_work);
	flush_delayed_work(&di->usb_charger_attached_work);
	flush_delayed_work(&di->ac_charger_attached_work);
	flush_delayed_work(&di->check_usbchgnotok_work);
	flush_delayed_work(&di->check_vbat_work);
	flush_delayed_work(&di->kick_wd_work);

	flush_work(&di->usb_link_status_work);
	flush_work(&di->ac_work);
	flush_work(&di->detect_usb_type_work);

	if (atomic_read(&di->current_stepping_sessions))
		return -EAGAIN;

	return 0;
}
#else
#define ab8500_charger_suspend      NULL
#define ab8500_charger_resume       NULL
#endif

static struct notifier_block charger_nb = {
	.notifier_call = ab8500_external_charger_prepare,
};

static int ab8500_charger_remove(struct platform_device *pdev)
{
	struct ab8500_charger *di = platform_get_drvdata(pdev);
	int i, irq, ret;

	/* Disable AC charging */
	ab8500_charger_ac_en(&di->ac_chg, false, 0, 0);

	/* Disable USB charging */
	ab8500_charger_usb_en(&di->usb_chg, false, 0, 0);

	/* Disable interrupts */
	for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
		irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
		free_irq(irq, di);
	}

	/* Backup battery voltage and current disable */
	ret = abx500_mask_and_set_register_interruptible(di->dev,
		AB8500_RTC, AB8500_RTC_CTRL_REG, RTC_BUP_CH_ENA, 0);
	if (ret < 0)
		dev_err(di->dev, "%s mask and set failed\n", __func__);

	usb_unregister_notifier(di->usb_phy, &di->nb);
	usb_put_phy(di->usb_phy);

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

	/* Unregister external charger enable notifier */
	if (!di->ac_chg.enabled)
		blocking_notifier_chain_unregister(
			&charger_notifier_list, &charger_nb);

	flush_scheduled_work();
	if (di->usb_chg.enabled)
		power_supply_unregister(di->usb_chg.psy);

	if (di->ac_chg.enabled && !di->ac_chg.external)
		power_supply_unregister(di->ac_chg.psy);

	return 0;
}

static char *supply_interface[] = {
	"ab8500_chargalg",
	"ab8500_fg",
	"ab8500_btemp",
};

static const struct power_supply_desc ab8500_ac_chg_desc = {
	.name		= "ab8500_ac",
	.type		= POWER_SUPPLY_TYPE_MAINS,
	.properties	= ab8500_charger_ac_props,
	.num_properties	= ARRAY_SIZE(ab8500_charger_ac_props),
	.get_property	= ab8500_charger_ac_get_property,
};

static const struct power_supply_desc ab8500_usb_chg_desc = {
	.name		= "ab8500_usb",
	.type		= POWER_SUPPLY_TYPE_USB,
	.properties	= ab8500_charger_usb_props,
	.num_properties	= ARRAY_SIZE(ab8500_charger_usb_props),
	.get_property	= ab8500_charger_usb_get_property,
};

static int ab8500_charger_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct abx500_bm_data *plat = pdev->dev.platform_data;
	struct power_supply_config ac_psy_cfg = {}, usb_psy_cfg = {};
	struct ab8500_charger *di;
	int irq, i, charger_status, ret = 0, ch_stat;

	di = devm_kzalloc(&pdev->dev, sizeof(*di), GFP_KERNEL);
	if (!di) {
		dev_err(&pdev->dev, "%s no mem for ab8500_charger\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;
		}
		di->autopower_cfg = of_property_read_bool(np, "autopower_cfg");
	} else
		di->autopower_cfg = false;

	/* get parent data */
	di->dev = &pdev->dev;
	di->parent = dev_get_drvdata(pdev->dev.parent);
	di->gpadc = ab8500_gpadc_get("ab8500-gpadc.0");

	/* initialize lock */
	spin_lock_init(&di->usb_state.usb_lock);
	mutex_init(&di->usb_ipt_crnt_lock);

	di->autopower = false;
	di->invalid_charger_detect_state = 0;

	/* AC and USB supply config */
	ac_psy_cfg.supplied_to = supply_interface;
	ac_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
	ac_psy_cfg.drv_data = &di->ac_chg;
	usb_psy_cfg.supplied_to = supply_interface;
	usb_psy_cfg.num_supplicants = ARRAY_SIZE(supply_interface);
	usb_psy_cfg.drv_data = &di->usb_chg;

	/* AC supply */
	/* ux500_charger sub-class */
	di->ac_chg.ops.enable = &ab8500_charger_ac_en;
	di->ac_chg.ops.check_enable = &ab8500_charger_ac_check_enable;
	di->ac_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
	di->ac_chg.ops.update_curr = &ab8500_charger_update_charger_current;
	di->ac_chg.max_out_volt = ab8500_charger_voltage_map[
		ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
	di->ac_chg.max_out_curr =
		di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
	di->ac_chg.wdt_refresh = CHG_WD_INTERVAL;
	di->ac_chg.enabled = di->bm->ac_enabled;
	di->ac_chg.external = false;

	/*notifier for external charger enabling*/
	if (!di->ac_chg.enabled)
		blocking_notifier_chain_register(
			&charger_notifier_list, &charger_nb);

	/* USB supply */
	/* ux500_charger sub-class */
	di->usb_chg.ops.enable = &ab8500_charger_usb_en;
	di->usb_chg.ops.check_enable = &ab8500_charger_usb_check_enable;
	di->usb_chg.ops.kick_wd = &ab8500_charger_watchdog_kick;
	di->usb_chg.ops.update_curr = &ab8500_charger_update_charger_current;
	di->usb_chg.max_out_volt = ab8500_charger_voltage_map[
		ARRAY_SIZE(ab8500_charger_voltage_map) - 1];
	di->usb_chg.max_out_curr =
		di->bm->chg_output_curr[di->bm->n_chg_out_curr - 1];
	di->usb_chg.wdt_refresh = CHG_WD_INTERVAL;
	di->usb_chg.enabled = di->bm->usb_enabled;
	di->usb_chg.external = false;
	di->usb_state.usb_current = -1;

	/* Create a work queue for the charger */
	di->charger_wq = alloc_ordered_workqueue("ab8500_charger_wq",
						 WQ_MEM_RECLAIM);
	if (di->charger_wq == NULL) {
		dev_err(di->dev, "failed to create work queue\n");
		return -ENOMEM;
	}

	mutex_init(&di->charger_attached_mutex);

	/* Init work for HW failure check */
	INIT_DEFERRABLE_WORK(&di->check_hw_failure_work,
		ab8500_charger_check_hw_failure_work);
	INIT_DEFERRABLE_WORK(&di->check_usbchgnotok_work,
		ab8500_charger_check_usbchargernotok_work);

	INIT_DELAYED_WORK(&di->ac_charger_attached_work,
			  ab8500_charger_ac_attached_work);
	INIT_DELAYED_WORK(&di->usb_charger_attached_work,
			  ab8500_charger_usb_attached_work);

	/*
	 * For ABB revision 1.0 and 1.1 there is a bug in the watchdog
	 * logic. That means we have to continously kick the charger
	 * watchdog even when no charger is connected. This is only
	 * valid once the AC charger has been enabled. This is
	 * a bug that is not handled by the algorithm and the
	 * watchdog have to be kicked by the charger driver
	 * when the AC charger is disabled
	 */
	INIT_DEFERRABLE_WORK(&di->kick_wd_work,
		ab8500_charger_kick_watchdog_work);

	INIT_DEFERRABLE_WORK(&di->check_vbat_work,
		ab8500_charger_check_vbat_work);

	INIT_DELAYED_WORK(&di->attach_work,
		ab8500_charger_usb_link_attach_work);

	INIT_DELAYED_WORK(&di->usb_state_changed_work,
		ab8500_charger_usb_state_changed_work);

	INIT_DELAYED_WORK(&di->vbus_drop_end_work,
		ab8500_charger_vbus_drop_end_work);

	/* Init work for charger detection */
	INIT_WORK(&di->usb_link_status_work,
		ab8500_charger_usb_link_status_work);
	INIT_WORK(&di->ac_work, ab8500_charger_ac_work);
	INIT_WORK(&di->detect_usb_type_work,
		ab8500_charger_detect_usb_type_work);

	/* Init work for checking HW status */
	INIT_WORK(&di->check_main_thermal_prot_work,
		ab8500_charger_check_main_thermal_prot_work);
	INIT_WORK(&di->check_usb_thermal_prot_work,
		ab8500_charger_check_usb_thermal_prot_work);

	/*
	 * VDD ADC supply needs to be enabled from this driver when there
	 * is a charger connected to avoid erroneous BTEMP_HIGH/LOW
	 * interrupts during charging
	 */
	di->regu = devm_regulator_get(di->dev, "vddadc");
	if (IS_ERR(di->regu)) {
		ret = PTR_ERR(di->regu);
		dev_err(di->dev, "failed to get vddadc regulator\n");
		goto free_charger_wq;
	}


	/* Initialize OVV, and other registers */
	ret = ab8500_charger_init_hw_registers(di);
	if (ret) {
		dev_err(di->dev, "failed to initialize ABB registers\n");
		goto free_charger_wq;
	}

	/* Register AC charger class */
	if (di->ac_chg.enabled) {
		di->ac_chg.psy = power_supply_register(di->dev,
						       &ab8500_ac_chg_desc,
						       &ac_psy_cfg);
		if (IS_ERR(di->ac_chg.psy)) {
			dev_err(di->dev, "failed to register AC charger\n");
			ret = PTR_ERR(di->ac_chg.psy);
			goto free_charger_wq;
		}
	}

	/* Register USB charger class */
	if (di->usb_chg.enabled) {
		di->usb_chg.psy = power_supply_register(di->dev,
							&ab8500_usb_chg_desc,
							&usb_psy_cfg);
		if (IS_ERR(di->usb_chg.psy)) {
			dev_err(di->dev, "failed to register USB charger\n");
			ret = PTR_ERR(di->usb_chg.psy);
			goto free_ac;
		}
	}

	di->usb_phy = usb_get_phy(USB_PHY_TYPE_USB2);
	if (IS_ERR_OR_NULL(di->usb_phy)) {
		dev_err(di->dev, "failed to get usb transceiver\n");
		ret = -EINVAL;
		goto free_usb;
	}
	di->nb.notifier_call = ab8500_charger_usb_notifier_call;
	ret = usb_register_notifier(di->usb_phy, &di->nb);
	if (ret) {
		dev_err(di->dev, "failed to register usb notifier\n");
		goto put_usb_phy;
	}

	/* Identify the connected charger types during startup */
	charger_status = ab8500_charger_detect_chargers(di, true);
	if (charger_status & AC_PW_CONN) {
		di->ac.charger_connected = 1;
		di->ac_conn = true;
		ab8500_power_supply_changed(di, di->ac_chg.psy);
		sysfs_notify(&di->ac_chg.psy->dev.kobj, NULL, "present");
	}

	if (charger_status & USB_PW_CONN) {
		di->vbus_detected = true;
		di->vbus_detected_start = true;
		queue_work(di->charger_wq,
			&di->detect_usb_type_work);
	}

	/* Register interrupts */
	for (i = 0; i < ARRAY_SIZE(ab8500_charger_irq); i++) {
		irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
		ret = request_threaded_irq(irq, NULL, ab8500_charger_irq[i].isr,
			IRQF_SHARED | IRQF_NO_SUSPEND,
			ab8500_charger_irq[i].name, di);

		if (ret != 0) {
			dev_err(di->dev, "failed to request %s IRQ %d: %d\n"
				, ab8500_charger_irq[i].name, irq, ret);
			goto free_irq;
		}
		dev_dbg(di->dev, "Requested %s IRQ %d: %d\n",
			ab8500_charger_irq[i].name, irq, ret);
	}

	platform_set_drvdata(pdev, di);

	mutex_lock(&di->charger_attached_mutex);

	ch_stat = ab8500_charger_detect_chargers(di, false);

	if ((ch_stat & AC_PW_CONN) == AC_PW_CONN) {
		if (is_ab8500(di->parent))
			queue_delayed_work(di->charger_wq,
					   &di->ac_charger_attached_work,
					   HZ);
	}
	if ((ch_stat & USB_PW_CONN) == USB_PW_CONN) {
		if (is_ab8500(di->parent))
			queue_delayed_work(di->charger_wq,
					   &di->usb_charger_attached_work,
					   HZ);
	}

	mutex_unlock(&di->charger_attached_mutex);

	return ret;

free_irq:
	usb_unregister_notifier(di->usb_phy, &di->nb);

	/* We also have to free all successfully registered irqs */
	for (i = i - 1; i >= 0; i--) {
		irq = platform_get_irq_byname(pdev, ab8500_charger_irq[i].name);
		free_irq(irq, di);
	}
put_usb_phy:
	usb_put_phy(di->usb_phy);
free_usb:
	if (di->usb_chg.enabled)
		power_supply_unregister(di->usb_chg.psy);
free_ac:
	if (di->ac_chg.enabled)
		power_supply_unregister(di->ac_chg.psy);
free_charger_wq:
	destroy_workqueue(di->charger_wq);
	return ret;
}

static const struct of_device_id ab8500_charger_match[] = {
	{ .compatible = "stericsson,ab8500-charger", },
	{ },
};

static struct platform_driver ab8500_charger_driver = {
	.probe = ab8500_charger_probe,
	.remove = ab8500_charger_remove,
	.suspend = ab8500_charger_suspend,
	.resume = ab8500_charger_resume,
	.driver = {
		.name = "ab8500-charger",
		.of_match_table = ab8500_charger_match,
	},
};

static int __init ab8500_charger_init(void)
{
	return platform_driver_register(&ab8500_charger_driver);
}

static void __exit ab8500_charger_exit(void)
{
	platform_driver_unregister(&ab8500_charger_driver);
}

subsys_initcall_sync(ab8500_charger_init);
module_exit(ab8500_charger_exit);

MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Johan Palsson, Karl Komierowski, Arun R Murthy");
MODULE_ALIAS("platform:ab8500-charger");
MODULE_DESCRIPTION("AB8500 charger management driver");