Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 1 | /* |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 2 | * Copyright (c) 2011-2013, The Linux Foundation. All rights reserved. |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License version 2 and |
| 6 | * only version 2 as published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | */ |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/err.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/mfd/pm8xxx/pm8xxx-adc.h> |
| 18 | #define KELVINMIL_DEGMIL 273160 |
| 19 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 20 | /* Units for temperature below (on x axis) is in 0.1DegC as |
| 21 | required by the battery driver. Note the resolution used |
| 22 | here to compute the table was done for DegC to milli-volts. |
| 23 | In consideration to limit the size of the table for the given |
| 24 | temperature range below, the result is linearly interpolated |
| 25 | and provided to the battery driver in the units desired for |
| 26 | their framework which is 0.1DegC. True resolution of 0.1DegC |
| 27 | will result in the below table size to increase by 10 times */ |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 28 | static const struct pm8xxx_adc_map_pt adcmap_btm_threshold[] = { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 29 | {-300, 1642}, |
| 30 | {-200, 1544}, |
| 31 | {-100, 1414}, |
Siddartha Mohanadoss | ae39c90 | 2011-11-09 17:54:31 -0800 | [diff] [blame] | 32 | {0, 1260}, |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 33 | {10, 1244}, |
| 34 | {20, 1228}, |
| 35 | {30, 1212}, |
| 36 | {40, 1195}, |
| 37 | {50, 1179}, |
| 38 | {60, 1162}, |
| 39 | {70, 1146}, |
| 40 | {80, 1129}, |
| 41 | {90, 1113}, |
| 42 | {100, 1097}, |
| 43 | {110, 1080}, |
| 44 | {120, 1064}, |
| 45 | {130, 1048}, |
| 46 | {140, 1032}, |
| 47 | {150, 1016}, |
| 48 | {160, 1000}, |
| 49 | {170, 985}, |
| 50 | {180, 969}, |
| 51 | {190, 954}, |
| 52 | {200, 939}, |
| 53 | {210, 924}, |
| 54 | {220, 909}, |
| 55 | {230, 894}, |
| 56 | {240, 880}, |
| 57 | {250, 866}, |
| 58 | {260, 852}, |
| 59 | {270, 838}, |
| 60 | {280, 824}, |
| 61 | {290, 811}, |
| 62 | {300, 798}, |
| 63 | {310, 785}, |
| 64 | {320, 773}, |
| 65 | {330, 760}, |
| 66 | {340, 748}, |
| 67 | {350, 736}, |
| 68 | {360, 725}, |
| 69 | {370, 713}, |
| 70 | {380, 702}, |
| 71 | {390, 691}, |
| 72 | {400, 681}, |
| 73 | {410, 670}, |
| 74 | {420, 660}, |
| 75 | {430, 650}, |
| 76 | {440, 640}, |
| 77 | {450, 631}, |
| 78 | {460, 622}, |
| 79 | {470, 613}, |
| 80 | {480, 604}, |
| 81 | {490, 595}, |
| 82 | {500, 587}, |
| 83 | {510, 579}, |
| 84 | {520, 571}, |
| 85 | {530, 563}, |
| 86 | {540, 556}, |
| 87 | {550, 548}, |
| 88 | {560, 541}, |
| 89 | {570, 534}, |
| 90 | {580, 527}, |
| 91 | {590, 521}, |
| 92 | {600, 514}, |
| 93 | {610, 508}, |
| 94 | {620, 502}, |
| 95 | {630, 496}, |
| 96 | {640, 490}, |
| 97 | {650, 485}, |
| 98 | {660, 281}, |
| 99 | {670, 274}, |
| 100 | {680, 267}, |
| 101 | {690, 260}, |
| 102 | {700, 254}, |
| 103 | {710, 247}, |
| 104 | {720, 241}, |
| 105 | {730, 235}, |
| 106 | {740, 229}, |
| 107 | {750, 224}, |
| 108 | {760, 218}, |
| 109 | {770, 213}, |
| 110 | {780, 208}, |
| 111 | {790, 203} |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 112 | }; |
| 113 | |
| 114 | static const struct pm8xxx_adc_map_pt adcmap_pa_therm[] = { |
Siddartha Mohanadoss | 9ae3efb | 2012-06-28 18:28:43 -0700 | [diff] [blame] | 115 | {1731, -30}, |
| 116 | {1726, -29}, |
| 117 | {1721, -28}, |
| 118 | {1715, -27}, |
| 119 | {1710, -26}, |
| 120 | {1703, -25}, |
| 121 | {1697, -24}, |
| 122 | {1690, -23}, |
| 123 | {1683, -22}, |
| 124 | {1675, -21}, |
| 125 | {1667, -20}, |
| 126 | {1659, -19}, |
| 127 | {1650, -18}, |
| 128 | {1641, -17}, |
| 129 | {1632, -16}, |
| 130 | {1622, -15}, |
| 131 | {1611, -14}, |
| 132 | {1600, -13}, |
| 133 | {1589, -12}, |
| 134 | {1577, -11}, |
| 135 | {1565, -10}, |
| 136 | {1552, -9}, |
| 137 | {1539, -8}, |
| 138 | {1525, -7}, |
| 139 | {1511, -6}, |
| 140 | {1496, -5}, |
| 141 | {1481, -4}, |
| 142 | {1465, -3}, |
| 143 | {1449, -2}, |
| 144 | {1432, -1}, |
| 145 | {1415, 0}, |
| 146 | {1398, 1}, |
| 147 | {1380, 2}, |
| 148 | {1362, 3}, |
| 149 | {1343, 4}, |
| 150 | {1324, 5}, |
| 151 | {1305, 6}, |
| 152 | {1285, 7}, |
| 153 | {1265, 8}, |
| 154 | {1245, 9}, |
| 155 | {1224, 10}, |
| 156 | {1203, 11}, |
| 157 | {1182, 12}, |
| 158 | {1161, 13}, |
| 159 | {1139, 14}, |
| 160 | {1118, 15}, |
| 161 | {1096, 16}, |
| 162 | {1074, 17}, |
| 163 | {1052, 18}, |
| 164 | {1030, 19}, |
| 165 | {1008, 20}, |
| 166 | {986, 21}, |
| 167 | {964, 22}, |
| 168 | {943, 23}, |
| 169 | {921, 24}, |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 170 | {899, 25}, |
Siddartha Mohanadoss | 9ae3efb | 2012-06-28 18:28:43 -0700 | [diff] [blame] | 171 | {878, 26}, |
| 172 | {857, 27}, |
| 173 | {836, 28}, |
| 174 | {815, 29}, |
| 175 | {794, 30}, |
| 176 | {774, 31}, |
| 177 | {754, 32}, |
| 178 | {734, 33}, |
| 179 | {714, 34}, |
| 180 | {695, 35}, |
| 181 | {676, 36}, |
| 182 | {657, 37}, |
| 183 | {639, 38}, |
| 184 | {621, 39}, |
| 185 | {604, 40}, |
| 186 | {586, 41}, |
| 187 | {570, 42}, |
| 188 | {553, 43}, |
| 189 | {537, 44}, |
| 190 | {521, 45}, |
| 191 | {506, 46}, |
| 192 | {491, 47}, |
| 193 | {476, 48}, |
| 194 | {462, 49}, |
| 195 | {448, 50}, |
| 196 | {435, 51}, |
| 197 | {421, 52}, |
| 198 | {409, 53}, |
| 199 | {396, 54}, |
| 200 | {384, 55}, |
| 201 | {372, 56}, |
| 202 | {361, 57}, |
| 203 | {350, 58}, |
| 204 | {339, 59}, |
| 205 | {329, 60}, |
| 206 | {318, 61}, |
| 207 | {309, 62}, |
| 208 | {299, 63}, |
| 209 | {290, 64}, |
| 210 | {281, 65}, |
| 211 | {272, 66}, |
| 212 | {264, 67}, |
| 213 | {256, 68}, |
| 214 | {248, 69}, |
| 215 | {240, 70}, |
| 216 | {233, 71}, |
| 217 | {226, 72}, |
| 218 | {219, 73}, |
| 219 | {212, 74}, |
| 220 | {206, 75}, |
| 221 | {199, 76}, |
| 222 | {193, 77}, |
| 223 | {187, 78}, |
| 224 | {182, 79}, |
| 225 | {176, 80}, |
| 226 | {171, 81}, |
| 227 | {166, 82}, |
| 228 | {161, 83}, |
| 229 | {156, 84}, |
| 230 | {151, 85}, |
| 231 | {147, 86}, |
| 232 | {142, 87}, |
| 233 | {138, 88}, |
| 234 | {134, 89}, |
| 235 | {130, 90}, |
| 236 | {126, 91}, |
| 237 | {122, 92}, |
| 238 | {119, 93}, |
| 239 | {115, 94}, |
| 240 | {112, 95}, |
| 241 | {109, 96}, |
| 242 | {106, 97}, |
| 243 | {103, 98}, |
| 244 | {100, 99}, |
| 245 | {97, 100}, |
| 246 | {94, 101}, |
| 247 | {91, 102}, |
| 248 | {89, 103}, |
| 249 | {86, 104}, |
| 250 | {84, 105}, |
| 251 | {82, 106}, |
| 252 | {79, 107}, |
| 253 | {77, 108}, |
| 254 | {75, 109}, |
| 255 | {73, 110}, |
| 256 | {71, 111}, |
| 257 | {69, 112}, |
| 258 | {67, 113}, |
| 259 | {65, 114}, |
| 260 | {64, 115}, |
| 261 | {62, 116}, |
| 262 | {60, 117}, |
| 263 | {59, 118}, |
| 264 | {57, 119}, |
| 265 | {56, 120}, |
| 266 | {54, 121}, |
| 267 | {53, 122}, |
| 268 | {51, 123}, |
| 269 | {50, 124}, |
| 270 | {49, 125} |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 271 | }; |
| 272 | |
| 273 | static const struct pm8xxx_adc_map_pt adcmap_ntcg_104ef_104fb[] = { |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 274 | {374682, -40960}, |
| 275 | {360553, -39936}, |
| 276 | {346630, -38912}, |
| 277 | {332940, -37888}, |
| 278 | {319510, -36864}, |
| 279 | {306363, -35840}, |
| 280 | {293521, -34816}, |
| 281 | {281001, -33792}, |
| 282 | {268818, -32768}, |
| 283 | {256987, -31744}, |
| 284 | {245516, -30720}, |
| 285 | {234413, -29696}, |
| 286 | {223685, -28672}, |
| 287 | {213333, -27648}, |
| 288 | {203360, -26624}, |
| 289 | {193763, -25600}, |
| 290 | {184541, -24576}, |
| 291 | {175691, -23552}, |
| 292 | {167205, -22528}, |
| 293 | {159079, -21504}, |
| 294 | {151304, -20480}, |
| 295 | {143872, -19456}, |
| 296 | {136775, -18432}, |
| 297 | {130001, -17408}, |
| 298 | {123542, -16384}, |
| 299 | {117387, -15360}, |
| 300 | {111526, -14336}, |
| 301 | {105946, -13312}, |
| 302 | {100639, -12288}, |
| 303 | {95592, -11264}, |
| 304 | {90795, -10240}, |
| 305 | {86238, -9216}, |
| 306 | {81909, -8192}, |
| 307 | {77800, -7168}, |
| 308 | {73899, -6144}, |
| 309 | {70197, -5120}, |
| 310 | {66685, -4096}, |
| 311 | {63354, -3072}, |
| 312 | {60194, -2048}, |
| 313 | {57198, -1024}, |
| 314 | {54356, 0}, |
| 315 | {51662, 1024}, |
| 316 | {49108, 2048}, |
| 317 | {46687, 3072}, |
| 318 | {44391, 4096}, |
| 319 | {42215, 5120}, |
| 320 | {40151, 6144}, |
| 321 | {38195, 7168}, |
| 322 | {36340, 8192}, |
| 323 | {34582, 9216}, |
| 324 | {32914, 10240}, |
| 325 | {31333, 11264}, |
| 326 | {29833, 12288}, |
| 327 | {28410, 13312}, |
| 328 | {27061, 14336}, |
| 329 | {25781, 15360}, |
| 330 | {24566, 16384}, |
| 331 | {23413, 17408}, |
| 332 | {22319, 18432}, |
| 333 | {21280, 19456}, |
| 334 | {20294, 20480}, |
| 335 | {19358, 21504}, |
| 336 | {18469, 22528}, |
| 337 | {17624, 23552}, |
| 338 | {16822, 24576}, |
| 339 | {16060, 25600}, |
| 340 | {15335, 26624}, |
| 341 | {14646, 27648}, |
| 342 | {13992, 28672}, |
| 343 | {13369, 29696}, |
| 344 | {12777, 30720}, |
| 345 | {12214, 31744}, |
| 346 | {11678, 32768}, |
| 347 | {11168, 33792}, |
| 348 | {10682, 34816}, |
| 349 | {10220, 35840}, |
| 350 | {9780, 36864}, |
| 351 | {9361, 37888}, |
| 352 | {8962, 38912}, |
| 353 | {8582, 39936}, |
| 354 | {8219, 40960}, |
| 355 | {7874, 41984}, |
| 356 | {7545, 43008}, |
| 357 | {7231, 44032}, |
| 358 | {6931, 45056}, |
| 359 | {6646, 46080}, |
| 360 | {6373, 47104}, |
| 361 | {6113, 48128}, |
| 362 | {5865, 49152}, |
| 363 | {5628, 50176}, |
| 364 | {5402, 51200}, |
| 365 | {5185, 52224}, |
| 366 | {4979, 53248}, |
| 367 | {4782, 54272}, |
| 368 | {4593, 55296}, |
| 369 | {4413, 56320}, |
| 370 | {4241, 57344}, |
| 371 | {4076, 58368}, |
| 372 | {3919, 59392}, |
| 373 | {3768, 60416}, |
| 374 | {3624, 61440}, |
| 375 | {3486, 62464}, |
| 376 | {3354, 63488}, |
| 377 | {3227, 64512}, |
| 378 | {3106, 65536}, |
| 379 | {2990, 66560}, |
| 380 | {2879, 67584}, |
| 381 | {2773, 68608}, |
| 382 | {2671, 69632}, |
| 383 | {2573, 70656}, |
| 384 | {2479, 71680}, |
| 385 | {2390, 72704}, |
| 386 | {2303, 73728}, |
| 387 | {2221, 74752}, |
| 388 | {2142, 75776}, |
| 389 | {2066, 76800}, |
| 390 | {1993, 77824}, |
| 391 | {1923, 78848}, |
| 392 | {1855, 79872}, |
| 393 | {1791, 80896}, |
| 394 | {1729, 81920}, |
| 395 | {1669, 82944}, |
| 396 | {1612, 83968}, |
| 397 | {1557, 84992}, |
| 398 | {1504, 86016}, |
| 399 | {1453, 87040}, |
| 400 | {1404, 88064}, |
| 401 | {1357, 89088}, |
| 402 | {1312, 90112}, |
| 403 | {1269, 91136}, |
| 404 | {1227, 92160}, |
| 405 | {1187, 93184}, |
| 406 | {1148, 94208}, |
| 407 | {1111, 95232}, |
| 408 | {1075, 96256}, |
| 409 | {1040, 97280}, |
| 410 | {1007, 98304}, |
| 411 | {975, 99328}, |
| 412 | {944, 100352}, |
| 413 | {914, 101376}, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 414 | {886, 102400}, |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 415 | {858, 103424}, |
| 416 | {831, 104448}, |
| 417 | {806, 105472}, |
| 418 | {781, 106496}, |
| 419 | {757, 107520}, |
| 420 | {734, 108544}, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 421 | {712, 109568}, |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 422 | {690, 110592}, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 423 | {670, 111616}, |
| 424 | {650, 112640}, |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 425 | {630, 113664}, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 426 | {612, 114688}, |
| 427 | {594, 115712}, |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 428 | {576, 116736}, |
| 429 | {559, 117760}, |
| 430 | {543, 118784}, |
| 431 | {527, 119808}, |
| 432 | {512, 120832}, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 433 | {498, 121856}, |
| 434 | {483, 122880}, |
| 435 | {470, 123904}, |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 436 | {456, 124928}, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 437 | {444, 125952}, |
| 438 | {431, 126976}, |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 439 | {419, 128000}, |
| 440 | {408, 129024}, |
| 441 | {396, 130048} |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 442 | }; |
| 443 | |
| 444 | static int32_t pm8xxx_adc_map_linear(const struct pm8xxx_adc_map_pt *pts, |
| 445 | uint32_t tablesize, int32_t input, int64_t *output) |
| 446 | { |
| 447 | bool descending = 1; |
| 448 | uint32_t i = 0; |
| 449 | |
| 450 | if ((pts == NULL) || (output == NULL)) |
| 451 | return -EINVAL; |
| 452 | |
| 453 | /* Check if table is descending or ascending */ |
| 454 | if (tablesize > 1) { |
| 455 | if (pts[0].x < pts[1].x) |
| 456 | descending = 0; |
| 457 | } |
| 458 | |
| 459 | while (i < tablesize) { |
| 460 | if ((descending == 1) && (pts[i].x < input)) { |
| 461 | /* table entry is less than measured |
| 462 | value and table is descending, stop */ |
| 463 | break; |
| 464 | } else if ((descending == 0) && |
| 465 | (pts[i].x > input)) { |
| 466 | /* table entry is greater than measured |
| 467 | value and table is ascending, stop */ |
| 468 | break; |
| 469 | } else { |
| 470 | i++; |
| 471 | } |
| 472 | } |
| 473 | |
| 474 | if (i == 0) |
| 475 | *output = pts[0].y; |
| 476 | else if (i == tablesize) |
| 477 | *output = pts[tablesize-1].y; |
| 478 | else { |
| 479 | /* result is between search_index and search_index-1 */ |
| 480 | /* interpolate linearly */ |
| 481 | *output = (((int32_t) ((pts[i].y - pts[i-1].y)* |
| 482 | (input - pts[i-1].x))/ |
| 483 | (pts[i].x - pts[i-1].x))+ |
| 484 | pts[i-1].y); |
| 485 | } |
| 486 | |
| 487 | return 0; |
| 488 | } |
| 489 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 490 | static int32_t pm8xxx_adc_map_batt_therm(const struct pm8xxx_adc_map_pt *pts, |
| 491 | uint32_t tablesize, int32_t input, int64_t *output) |
| 492 | { |
| 493 | bool descending = 1; |
| 494 | uint32_t i = 0; |
| 495 | |
| 496 | if ((pts == NULL) || (output == NULL)) |
| 497 | return -EINVAL; |
| 498 | |
| 499 | /* Check if table is descending or ascending */ |
| 500 | if (tablesize > 1) { |
| 501 | if (pts[0].y < pts[1].y) |
| 502 | descending = 0; |
| 503 | } |
| 504 | |
| 505 | while (i < tablesize) { |
| 506 | if ((descending == 1) && (pts[i].y < input)) { |
| 507 | /* table entry is less than measured |
| 508 | value and table is descending, stop */ |
| 509 | break; |
| 510 | } else if ((descending == 0) && (pts[i].y > input)) { |
| 511 | /* table entry is greater than measured |
| 512 | value and table is ascending, stop */ |
| 513 | break; |
| 514 | } else { |
| 515 | i++; |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | if (i == 0) { |
| 520 | *output = pts[0].x; |
| 521 | } else if (i == tablesize) { |
| 522 | *output = pts[tablesize-1].x; |
| 523 | } else { |
| 524 | /* result is between search_index and search_index-1 */ |
| 525 | /* interpolate linearly */ |
| 526 | *output = (((int32_t) ((pts[i].x - pts[i-1].x)* |
| 527 | (input - pts[i-1].y))/ |
| 528 | (pts[i].y - pts[i-1].y))+ |
| 529 | pts[i-1].x); |
| 530 | } |
| 531 | |
| 532 | return 0; |
| 533 | } |
| 534 | |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 535 | int32_t pm8xxx_adc_scale_default(int32_t adc_code, |
| 536 | const struct pm8xxx_adc_properties *adc_properties, |
| 537 | const struct pm8xxx_adc_chan_properties *chan_properties, |
| 538 | struct pm8xxx_adc_chan_result *adc_chan_result) |
| 539 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 540 | bool negative_rawfromoffset = 0, negative_offset = 0; |
| 541 | int64_t scale_voltage = 0; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 542 | |
| 543 | if (!chan_properties || !chan_properties->offset_gain_numerator || |
| 544 | !chan_properties->offset_gain_denominator || !adc_properties |
| 545 | || !adc_chan_result) |
| 546 | return -EINVAL; |
| 547 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 548 | scale_voltage = (adc_code - |
| 549 | chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].adc_gnd) |
| 550 | * chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].dx; |
| 551 | if (scale_voltage < 0) { |
| 552 | negative_offset = 1; |
| 553 | scale_voltage = -scale_voltage; |
| 554 | } |
| 555 | do_div(scale_voltage, |
| 556 | chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].dy); |
| 557 | if (negative_offset) |
| 558 | scale_voltage = -scale_voltage; |
| 559 | scale_voltage += chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].dx; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 560 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 561 | if (scale_voltage < 0) { |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 562 | if (adc_properties->bipolar) { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 563 | scale_voltage = -scale_voltage; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 564 | negative_rawfromoffset = 1; |
| 565 | } else { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 566 | scale_voltage = 0; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 567 | } |
| 568 | } |
| 569 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 570 | adc_chan_result->measurement = scale_voltage * |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 571 | chan_properties->offset_gain_denominator; |
| 572 | |
| 573 | /* do_div only perform positive integer division! */ |
| 574 | do_div(adc_chan_result->measurement, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 575 | chan_properties->offset_gain_numerator); |
| 576 | |
| 577 | if (negative_rawfromoffset) |
| 578 | adc_chan_result->measurement = -adc_chan_result->measurement; |
| 579 | |
| 580 | /* Note: adc_chan_result->measurement is in the unit of |
| 581 | * adc_properties.adc_reference. For generic channel processing, |
| 582 | * channel measurement is a scale/ratio relative to the adc |
| 583 | * reference input */ |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 584 | adc_chan_result->physical = adc_chan_result->measurement; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 585 | |
| 586 | return 0; |
| 587 | } |
| 588 | EXPORT_SYMBOL_GPL(pm8xxx_adc_scale_default); |
| 589 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 590 | static int64_t pm8xxx_adc_scale_ratiometric_calib(int32_t adc_code, |
| 591 | const struct pm8xxx_adc_properties *adc_properties, |
| 592 | const struct pm8xxx_adc_chan_properties *chan_properties) |
| 593 | { |
| 594 | int64_t adc_voltage = 0; |
| 595 | bool negative_offset = 0; |
| 596 | |
| 597 | if (!chan_properties || !chan_properties->offset_gain_numerator || |
| 598 | !chan_properties->offset_gain_denominator || !adc_properties) |
| 599 | return -EINVAL; |
| 600 | |
| 601 | adc_voltage = (adc_code - |
| 602 | chan_properties->adc_graph[ADC_CALIB_RATIOMETRIC].adc_gnd) |
| 603 | * adc_properties->adc_vdd_reference; |
| 604 | if (adc_voltage < 0) { |
| 605 | negative_offset = 1; |
| 606 | adc_voltage = -adc_voltage; |
| 607 | } |
| 608 | do_div(adc_voltage, |
| 609 | chan_properties->adc_graph[ADC_CALIB_RATIOMETRIC].dy); |
| 610 | if (negative_offset) |
| 611 | adc_voltage = -adc_voltage; |
| 612 | |
| 613 | return adc_voltage; |
| 614 | } |
| 615 | |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 616 | int32_t pm8xxx_adc_scale_batt_therm(int32_t adc_code, |
| 617 | const struct pm8xxx_adc_properties *adc_properties, |
| 618 | const struct pm8xxx_adc_chan_properties *chan_properties, |
| 619 | struct pm8xxx_adc_chan_result *adc_chan_result) |
| 620 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 621 | int64_t bat_voltage = 0; |
| 622 | |
| 623 | bat_voltage = pm8xxx_adc_scale_ratiometric_calib(adc_code, |
| 624 | adc_properties, chan_properties); |
| 625 | |
| 626 | return pm8xxx_adc_map_batt_therm( |
| 627 | adcmap_btm_threshold, |
| 628 | ARRAY_SIZE(adcmap_btm_threshold), |
| 629 | bat_voltage, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 630 | &adc_chan_result->physical); |
| 631 | } |
| 632 | EXPORT_SYMBOL_GPL(pm8xxx_adc_scale_batt_therm); |
| 633 | |
| 634 | int32_t pm8xxx_adc_scale_pa_therm(int32_t adc_code, |
| 635 | const struct pm8xxx_adc_properties *adc_properties, |
| 636 | const struct pm8xxx_adc_chan_properties *chan_properties, |
| 637 | struct pm8xxx_adc_chan_result *adc_chan_result) |
| 638 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 639 | int64_t pa_voltage = 0; |
| 640 | |
| 641 | pa_voltage = pm8xxx_adc_scale_ratiometric_calib(adc_code, |
| 642 | adc_properties, chan_properties); |
| 643 | |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 644 | return pm8xxx_adc_map_linear( |
| 645 | adcmap_pa_therm, |
| 646 | ARRAY_SIZE(adcmap_pa_therm), |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 647 | pa_voltage, |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 648 | &adc_chan_result->physical); |
| 649 | } |
| 650 | EXPORT_SYMBOL_GPL(pm8xxx_adc_scale_pa_therm); |
| 651 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 652 | int32_t pm8xxx_adc_scale_batt_id(int32_t adc_code, |
| 653 | const struct pm8xxx_adc_properties *adc_properties, |
| 654 | const struct pm8xxx_adc_chan_properties *chan_properties, |
| 655 | struct pm8xxx_adc_chan_result *adc_chan_result) |
| 656 | { |
| 657 | int64_t batt_id_voltage = 0; |
| 658 | |
| 659 | batt_id_voltage = pm8xxx_adc_scale_ratiometric_calib(adc_code, |
| 660 | adc_properties, chan_properties); |
| 661 | adc_chan_result->physical = batt_id_voltage; |
| 662 | adc_chan_result->physical = adc_chan_result->measurement; |
| 663 | |
| 664 | return 0; |
| 665 | } |
| 666 | EXPORT_SYMBOL_GPL(pm8xxx_adc_scale_batt_id); |
| 667 | |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 668 | int32_t pm8xxx_adc_scale_pmic_therm(int32_t adc_code, |
| 669 | const struct pm8xxx_adc_properties *adc_properties, |
| 670 | const struct pm8xxx_adc_chan_properties *chan_properties, |
| 671 | struct pm8xxx_adc_chan_result *adc_chan_result) |
| 672 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 673 | int64_t pmic_voltage = 0; |
| 674 | bool negative_offset = 0; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 675 | |
| 676 | if (!chan_properties || !chan_properties->offset_gain_numerator || |
| 677 | !chan_properties->offset_gain_denominator || !adc_properties |
| 678 | || !adc_chan_result) |
| 679 | return -EINVAL; |
| 680 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 681 | pmic_voltage = (adc_code - |
| 682 | chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].adc_gnd) |
| 683 | * chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].dx; |
| 684 | if (pmic_voltage < 0) { |
| 685 | negative_offset = 1; |
| 686 | pmic_voltage = -pmic_voltage; |
| 687 | } |
| 688 | do_div(pmic_voltage, |
| 689 | chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].dy); |
| 690 | if (negative_offset) |
| 691 | pmic_voltage = -pmic_voltage; |
| 692 | pmic_voltage += chan_properties->adc_graph[ADC_CALIB_ABSOLUTE].dx; |
| 693 | |
| 694 | if (pmic_voltage > 0) { |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 695 | /* 2mV/K */ |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 696 | adc_chan_result->measurement = pmic_voltage* |
| 697 | chan_properties->offset_gain_denominator; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 698 | |
| 699 | do_div(adc_chan_result->measurement, |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 700 | chan_properties->offset_gain_numerator * 2); |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 701 | } else { |
| 702 | adc_chan_result->measurement = 0; |
| 703 | } |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 704 | /* Change to .001 deg C */ |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 705 | adc_chan_result->measurement -= KELVINMIL_DEGMIL; |
| 706 | adc_chan_result->physical = (int32_t)adc_chan_result->measurement; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 707 | |
| 708 | return 0; |
| 709 | } |
| 710 | EXPORT_SYMBOL_GPL(pm8xxx_adc_scale_pmic_therm); |
| 711 | |
| 712 | /* Scales the ADC code to 0.001 degrees C using the map |
| 713 | * table for the XO thermistor. |
| 714 | */ |
| 715 | int32_t pm8xxx_adc_tdkntcg_therm(int32_t adc_code, |
| 716 | const struct pm8xxx_adc_properties *adc_properties, |
| 717 | const struct pm8xxx_adc_chan_properties *chan_properties, |
| 718 | struct pm8xxx_adc_chan_result *adc_chan_result) |
| 719 | { |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 720 | int64_t xo_thm = 0; |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 721 | uint32_t num1 = 0; |
| 722 | uint32_t num2 = 0; |
| 723 | uint32_t dnum = 0; |
| 724 | uint32_t rt_r25 = 0; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 725 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 726 | if (!chan_properties || !chan_properties->offset_gain_numerator || |
| 727 | !chan_properties->offset_gain_denominator || !adc_properties |
| 728 | || !adc_chan_result) |
| 729 | return -EINVAL; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 730 | |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 731 | xo_thm = pm8xxx_adc_scale_ratiometric_calib(adc_code, |
| 732 | adc_properties, chan_properties); |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 733 | if (xo_thm < 0) |
| 734 | xo_thm = -xo_thm; |
| 735 | |
| 736 | num1 = xo_thm << 14; |
| 737 | num2 = (adc_properties->adc_vdd_reference - xo_thm) >> 1; |
| 738 | dnum = (adc_properties->adc_vdd_reference - xo_thm); |
| 739 | |
| 740 | if (dnum == 0) |
| 741 | rt_r25 = 0x7FFFFFFF ; |
| 742 | else |
| 743 | rt_r25 = (num1 + num2)/dnum ; |
| 744 | |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 745 | pm8xxx_adc_map_linear(adcmap_ntcg_104ef_104fb, |
| 746 | ARRAY_SIZE(adcmap_ntcg_104ef_104fb), |
Dipen Parmar | b54e106 | 2013-01-02 11:56:00 +0530 | [diff] [blame] | 747 | rt_r25, &adc_chan_result->physical); |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 748 | |
| 749 | return 0; |
| 750 | } |
| 751 | EXPORT_SYMBOL_GPL(pm8xxx_adc_tdkntcg_therm); |
| 752 | |
Siddartha Mohanadoss | ae39c90 | 2011-11-09 17:54:31 -0800 | [diff] [blame] | 753 | int32_t pm8xxx_adc_batt_scaler(struct pm8xxx_adc_arb_btm_param *btm_param, |
| 754 | const struct pm8xxx_adc_properties *adc_properties, |
| 755 | const struct pm8xxx_adc_chan_properties *chan_properties) |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 756 | { |
| 757 | int rc; |
| 758 | |
| 759 | rc = pm8xxx_adc_map_linear( |
| 760 | adcmap_btm_threshold, |
| 761 | ARRAY_SIZE(adcmap_btm_threshold), |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 762 | (btm_param->low_thr_temp), |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 763 | &btm_param->low_thr_voltage); |
Siddartha Mohanadoss | ae39c90 | 2011-11-09 17:54:31 -0800 | [diff] [blame] | 764 | if (rc) |
| 765 | return rc; |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 766 | |
Siddartha Mohanadoss | ae39c90 | 2011-11-09 17:54:31 -0800 | [diff] [blame] | 767 | btm_param->low_thr_voltage *= |
| 768 | chan_properties->adc_graph[ADC_CALIB_RATIOMETRIC].dy; |
| 769 | do_div(btm_param->low_thr_voltage, adc_properties->adc_vdd_reference); |
| 770 | btm_param->low_thr_voltage += |
| 771 | chan_properties->adc_graph[ADC_CALIB_RATIOMETRIC].adc_gnd; |
| 772 | |
| 773 | rc = pm8xxx_adc_map_linear( |
| 774 | adcmap_btm_threshold, |
| 775 | ARRAY_SIZE(adcmap_btm_threshold), |
Siddartha Mohanadoss | 37e6fc0 | 2011-11-16 16:57:03 -0800 | [diff] [blame] | 776 | (btm_param->high_thr_temp), |
Siddartha Mohanadoss | ae39c90 | 2011-11-09 17:54:31 -0800 | [diff] [blame] | 777 | &btm_param->high_thr_voltage); |
| 778 | if (rc) |
| 779 | return rc; |
| 780 | |
| 781 | btm_param->high_thr_voltage *= |
| 782 | chan_properties->adc_graph[ADC_CALIB_RATIOMETRIC].dy; |
| 783 | do_div(btm_param->high_thr_voltage, adc_properties->adc_vdd_reference); |
| 784 | btm_param->high_thr_voltage += |
| 785 | chan_properties->adc_graph[ADC_CALIB_RATIOMETRIC].adc_gnd; |
| 786 | |
Siddartha Mohanadoss | 17607d2 | 2011-10-05 10:36:20 -0700 | [diff] [blame] | 787 | |
| 788 | return rc; |
| 789 | } |
| 790 | EXPORT_SYMBOL_GPL(pm8xxx_adc_batt_scaler); |