ab8500_charger.c 102 KB
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 3656 3657 3658 3659 3660 3661 3662 3663 3664 3665 3666 3667 3668 3669 3670 3671 3672 3673 3674 3675 3676 3677 3678 3679 3680 3681 3682 3683 3684 3685 3686 3687 3688 3689 3690 3691 3692 3693 3694 3695 3696 3697 3698 3699 3700 3701 3702 3703 3704 3705 3706 3707 3708 3709 3710 3711 3712 3713 3714 3715 3716 3717 3718 3719 3720 3721 3722 3723 3724 3725 3726 3727 3728 3729 3730 3731 3732 3733 3734 3735 3736 3737 3738 3739 3740 3741 3742 3743 3744 3745 3746 3747 3748 3749 3750 3751 3752 3753 3754 3755 3756 3757
/*
 * Copyright (C) ST-Ericsson SA 2012
 *
 * Charger driver for AB8500
 *
 * License Terms: GNU General Public License v2
 * 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 AB8540_VBUS_IN_CURR_LIM_SHIFT	2
#define AUTO_VBUS_IN_CURR_LIM_SHIFT	4
#define AB8540_AUTO_VBUS_IN_CURR_MASK	0x3F
#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;
		}
	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:
		if (is_ab8540(di->parent))
			shift_value = AB8540_VBUS_IN_CURR_LIM_SHIFT;
		else
			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.type == POWER_SUPPLY_TYPE_MAINS)
		di = to_ab8500_charger_ac_device_info(charger);
	else if (charger->psy.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.type == POWER_SUPPLY_TYPE_MAINS)
		di = to_ab8500_charger_ac_device_info(charger);
	else if (charger->psy.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;
}

/**
 * ab8540_charger_power_path_enable() - enable usb power path mode
 * @charger:	pointer to the ux500_charger structure
 * @enable:	enable/disable flag
 *
 * Enable or disable the power path for usb mode
 * Returns error code in case of failure else 0(on success)
 */
static int ab8540_charger_power_path_enable(struct ux500_charger *charger,
		bool enable)
{
	int ret;
	struct ab8500_charger *di;

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

	ret = abx500_mask_and_set_register_interruptible(di->dev,
				AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
				BUS_POWER_PATH_MODE_ENA, enable);
	if (ret) {
		dev_err(di->dev, "%s write failed\n", __func__);
		return ret;
	}

	return ret;
}


/**
 * ab8540_charger_usb_pre_chg_enable() - enable usb pre change
 * @charger:	pointer to the ux500_charger structure
 * @enable:	enable/disable flag
 *
 * Enable or disable the pre-chage for usb mode
 * Returns error code in case of failure else 0(on success)
 */
static int ab8540_charger_usb_pre_chg_enable(struct ux500_charger *charger,
		bool enable)
{
	int ret;
	struct ab8500_charger *di;

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

	ret = abx500_mask_and_set_register_interruptible(di->dev,
				AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
				BUS_POWER_PATH_PRECHG_ENA, enable);
	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;
	struct ab8500_charger *di;
	union power_supply_propval ret;
	int i, j;
	bool psy_found = false;
	struct ux500_charger *usb_chg;

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

	di = to_ab8500_charger_usb_device_info(usb_chg);

	ext = dev_get_drvdata(dev);

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

	if (!psy_found)
		return 0;

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

		if (ext->get_property(ext, prop, &ret))
			continue;

		switch (prop) {
		case POWER_SUPPLY_PROP_VOLTAGE_NOW:
			switch (ext->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);

	if (is_ab8540(di->parent))
		ret = abx500_get_register_interruptible(di->dev, AB8500_CHARGER,
				AB8540_CH_USBCH_STAT3_REG, &reg_value);
	else
		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;
	}

	if (is_ab8540(di->parent))
		curr = di->bm->chg_input_curr[
			reg_value & AB8540_AUTO_VBUS_IN_CURR_MASK];
	else
		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;
		}

		if (is_ab8540(di->parent))
			ret = abx500_set_register_interruptible(di->dev,
				AB8500_CHARGER, AB8500_CH_OPT_CRNTLVL_MAX_REG,
				CH_OP_CUR_LVL_2P);
		else
			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_ab9540_2p0(di->parent) || is_ab9540_3p0(di->parent)
	 || is_ab8505_2p0(di->parent) || is_ab8540(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, "faile 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;
	}
	if (is_ab8540(di->parent)) {
		ret = abx500_set_register_interruptible(di->dev,
			AB8500_RTC,
			AB8500_RTC_CTRL1_REG,
			bup_vch_range | vbup33_vrtcn);
		if (ret) {
			dev_err(di->dev,
				"failed to setup backup battery charging\n");
			goto out;
		}
	}

	/* Enable backup battery charging */
	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__);

	if (is_ab8540(di->parent)) {
		ret = abx500_mask_and_set_register_interruptible(di->dev,
			AB8500_CHARGER, AB8540_USB_PP_MODE_REG,
			BUS_VSYS_VOL_SELECT_MASK, BUS_VSYS_VOL_SELECT_3P6V);
		if (ret) {
			dev_err(di->dev,
				"failed to setup usb power path vsys voltage\n");
			goto out;
		}
		ret = abx500_mask_and_set_register_interruptible(di->dev,
			AB8500_CHARGER, AB8540_USB_PP_CHR_REG,
			BUS_PP_PRECHG_CURRENT_MASK, 0);
		if (ret) {
			dev_err(di->dev,
				"failed to setup usb power path prechage current\n");
			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 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 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 supply */
	/* power_supply base class */
	di->ac_chg.psy.name = "ab8500_ac";
	di->ac_chg.psy.type = POWER_SUPPLY_TYPE_MAINS;
	di->ac_chg.psy.properties = ab8500_charger_ac_props;
	di->ac_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_ac_props);
	di->ac_chg.psy.get_property = ab8500_charger_ac_get_property;
	di->ac_chg.psy.supplied_to = supply_interface;
	di->ac_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
	/* 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 */
	/* power_supply base class */
	di->usb_chg.psy.name = "ab8500_usb";
	di->usb_chg.psy.type = POWER_SUPPLY_TYPE_USB;
	di->usb_chg.psy.properties = ab8500_charger_usb_props;
	di->usb_chg.psy.num_properties = ARRAY_SIZE(ab8500_charger_usb_props);
	di->usb_chg.psy.get_property = ab8500_charger_usb_get_property;
	di->usb_chg.psy.supplied_to = supply_interface;
	di->usb_chg.psy.num_supplicants = ARRAY_SIZE(supply_interface),
	/* 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.ops.pp_enable = &ab8540_charger_power_path_enable;
	di->usb_chg.ops.pre_chg_enable = &ab8540_charger_usb_pre_chg_enable;
	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_chg.power_path = di->bm->usb_power_path;
	di->usb_state.usb_current = -1;

	/* Create a work queue for the charger */
	di->charger_wq =
		create_singlethread_workqueue("ab8500_charger_wq");
	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) {
		ret = power_supply_register(di->dev, &di->ac_chg.psy);
		if (ret) {
			dev_err(di->dev, "failed to register AC charger\n");
			goto free_charger_wq;
		}
	}

	/* Register USB charger class */
	if (di->usb_chg.enabled) {
		ret = power_supply_register(di->dev, &di->usb_chg.psy);
		if (ret) {
			dev_err(di->dev, "failed to register USB charger\n");
			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",
		.owner = THIS_MODULE,
		.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");