drivers/mfd/da9052-core.c

   1 /*
   2  * Device access for Dialog DA9052 PMICs.
   3  *
   4  * Copyright(c) 2011 Dialog Semiconductor Ltd.
   5  *
   6  * Author: David Dajun Chen <dchen@diasemi.com>
   7  *
   8  *  This program is free software; you can redistribute  it and/or modify it
   9  *  under  the terms of  the GNU General  Public License as published by the
  10  *  Free Software Foundation;  either version 2 of the  License, or (at your
  11  *  option) any later version.
  12  */
  13
  14 #include <linux/device.h>
  15 #include <linux/delay.h>
  16 #include <linux/input.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/mfd/core.h>
  19 #include <linux/slab.h>
  20 #include <linux/module.h>
  21
  22 #include <linux/mfd/da9052/da9052.h>
  23 #include <linux/mfd/da9052/pdata.h>
  24 #include <linux/mfd/da9052/reg.h>
  25
  26 static bool da9052_reg_readable(struct device *dev, unsigned int reg)
  27 {
  28         switch (reg) {
  29         case DA9052_PAGE0_CON_REG:
  30         case DA9052_STATUS_A_REG:
  31         case DA9052_STATUS_B_REG:
  32         case DA9052_STATUS_C_REG:
  33         case DA9052_STATUS_D_REG:
  34         case DA9052_EVENT_A_REG:
  35         case DA9052_EVENT_B_REG:
  36         case DA9052_EVENT_C_REG:
  37         case DA9052_EVENT_D_REG:
  38         case DA9052_FAULTLOG_REG:
  39         case DA9052_IRQ_MASK_A_REG:
  40         case DA9052_IRQ_MASK_B_REG:
  41         case DA9052_IRQ_MASK_C_REG:
  42         case DA9052_IRQ_MASK_D_REG:
  43         case DA9052_CONTROL_A_REG:
  44         case DA9052_CONTROL_B_REG:
  45         case DA9052_CONTROL_C_REG:
  46         case DA9052_CONTROL_D_REG:
  47         case DA9052_PDDIS_REG:
  48         case DA9052_INTERFACE_REG:
  49         case DA9052_RESET_REG:
  50         case DA9052_GPIO_0_1_REG:
  51         case DA9052_GPIO_2_3_REG:
  52         case DA9052_GPIO_4_5_REG:
  53         case DA9052_GPIO_6_7_REG:
  54         case DA9052_GPIO_8_9_REG:
  55         case DA9052_GPIO_10_11_REG:
  56         case DA9052_GPIO_12_13_REG:
  57         case DA9052_GPIO_14_15_REG:
  58         case DA9052_ID_0_1_REG:
  59         case DA9052_ID_2_3_REG:
  60         case DA9052_ID_4_5_REG:
  61         case DA9052_ID_6_7_REG:
  62         case DA9052_ID_8_9_REG:
  63         case DA9052_ID_10_11_REG:
  64         case DA9052_ID_12_13_REG:
  65         case DA9052_ID_14_15_REG:
  66         case DA9052_ID_16_17_REG:
  67         case DA9052_ID_18_19_REG:
  68         case DA9052_ID_20_21_REG:
  69         case DA9052_SEQ_STATUS_REG:
  70         case DA9052_SEQ_A_REG:
  71         case DA9052_SEQ_B_REG:
  72         case DA9052_SEQ_TIMER_REG:
  73         case DA9052_BUCKA_REG:
  74         case DA9052_BUCKB_REG:
  75         case DA9052_BUCKCORE_REG:
  76         case DA9052_BUCKPRO_REG:
  77         case DA9052_BUCKMEM_REG:
  78         case DA9052_BUCKPERI_REG:
  79         case DA9052_LDO1_REG:
  80         case DA9052_LDO2_REG:
  81         case DA9052_LDO3_REG:
  82         case DA9052_LDO4_REG:
  83         case DA9052_LDO5_REG:
  84         case DA9052_LDO6_REG:
  85         case DA9052_LDO7_REG:
  86         case DA9052_LDO8_REG:
  87         case DA9052_LDO9_REG:
  88         case DA9052_LDO10_REG:
  89         case DA9052_SUPPLY_REG:
  90         case DA9052_PULLDOWN_REG:
  91         case DA9052_CHGBUCK_REG:
  92         case DA9052_WAITCONT_REG:
  93         case DA9052_ISET_REG:
  94         case DA9052_BATCHG_REG:
  95         case DA9052_CHG_CONT_REG:
  96         case DA9052_INPUT_CONT_REG:
  97         case DA9052_CHG_TIME_REG:
  98         case DA9052_BBAT_CONT_REG:
  99         case DA9052_BOOST_REG:
 100         case DA9052_LED_CONT_REG:
 101         case DA9052_LEDMIN123_REG:
 102         case DA9052_LED1_CONF_REG:
 103         case DA9052_LED2_CONF_REG:
 104         case DA9052_LED3_CONF_REG:
 105         case DA9052_LED1CONT_REG:
 106         case DA9052_LED2CONT_REG:
 107         case DA9052_LED3CONT_REG:
 108         case DA9052_LED_CONT_4_REG:
 109         case DA9052_LED_CONT_5_REG:
 110         case DA9052_ADC_MAN_REG:
 111         case DA9052_ADC_CONT_REG:
 112         case DA9052_ADC_RES_L_REG:
 113         case DA9052_ADC_RES_H_REG:
 114         case DA9052_VDD_RES_REG:
 115         case DA9052_VDD_MON_REG:
 116         case DA9052_ICHG_AV_REG:
 117         case DA9052_ICHG_THD_REG:
 118         case DA9052_ICHG_END_REG:
 119         case DA9052_TBAT_RES_REG:
 120         case DA9052_TBAT_HIGHP_REG:
 121         case DA9052_TBAT_HIGHN_REG:
 122         case DA9052_TBAT_LOW_REG:
 123         case DA9052_T_OFFSET_REG:
 124         case DA9052_ADCIN4_RES_REG:
 125         case DA9052_AUTO4_HIGH_REG:
 126         case DA9052_AUTO4_LOW_REG:
 127         case DA9052_ADCIN5_RES_REG:
 128         case DA9052_AUTO5_HIGH_REG:
 129         case DA9052_AUTO5_LOW_REG:
 130         case DA9052_ADCIN6_RES_REG:
 131         case DA9052_AUTO6_HIGH_REG:
 132         case DA9052_AUTO6_LOW_REG:
 133         case DA9052_TJUNC_RES_REG:
 134         case DA9052_TSI_CONT_A_REG:
 135         case DA9052_TSI_CONT_B_REG:
 136         case DA9052_TSI_X_MSB_REG:
 137         case DA9052_TSI_Y_MSB_REG:
 138         case DA9052_TSI_LSB_REG:
 139         case DA9052_TSI_Z_MSB_REG:
 140         case DA9052_COUNT_S_REG:
 141         case DA9052_COUNT_MI_REG:
 142         case DA9052_COUNT_H_REG:
 143         case DA9052_COUNT_D_REG:
 144         case DA9052_COUNT_MO_REG:
 145         case DA9052_COUNT_Y_REG:
 146         case DA9052_ALARM_MI_REG:
 147         case DA9052_ALARM_H_REG:
 148         case DA9052_ALARM_D_REG:
 149         case DA9052_ALARM_MO_REG:
 150         case DA9052_ALARM_Y_REG:
 151         case DA9052_SECOND_A_REG:
 152         case DA9052_SECOND_B_REG:
 153         case DA9052_SECOND_C_REG:
 154         case DA9052_SECOND_D_REG:
 155         case DA9052_PAGE1_CON_REG:
 156                 return true;
 157         default:
 158                 return false;
 159         }
 160 }
 161
 162 static bool da9052_reg_writeable(struct device *dev, unsigned int reg)
 163 {
 164         switch (reg) {
 165         case DA9052_PAGE0_CON_REG:
 166         case DA9052_EVENT_A_REG:
 167         case DA9052_EVENT_B_REG:
 168         case DA9052_EVENT_C_REG:
 169         case DA9052_EVENT_D_REG:
 170         case DA9052_FAULTLOG_REG:
 171         case DA9052_IRQ_MASK_A_REG:
 172         case DA9052_IRQ_MASK_B_REG:
 173         case DA9052_IRQ_MASK_C_REG:
 174         case DA9052_IRQ_MASK_D_REG:
 175         case DA9052_CONTROL_A_REG:
 176         case DA9052_CONTROL_B_REG:
 177         case DA9052_CONTROL_C_REG:
 178         case DA9052_CONTROL_D_REG:
 179         case DA9052_PDDIS_REG:
 180         case DA9052_RESET_REG:
 181         case DA9052_GPIO_0_1_REG:
 182         case DA9052_GPIO_2_3_REG:
 183         case DA9052_GPIO_4_5_REG:
 184         case DA9052_GPIO_6_7_REG:
 185         case DA9052_GPIO_8_9_REG:
 186         case DA9052_GPIO_10_11_REG:
 187         case DA9052_GPIO_12_13_REG:
 188         case DA9052_GPIO_14_15_REG:
 189         case DA9052_ID_0_1_REG:
 190         case DA9052_ID_2_3_REG:
 191         case DA9052_ID_4_5_REG:
 192         case DA9052_ID_6_7_REG:
 193         case DA9052_ID_8_9_REG:
 194         case DA9052_ID_10_11_REG:
 195         case DA9052_ID_12_13_REG:
 196         case DA9052_ID_14_15_REG:
 197         case DA9052_ID_16_17_REG:
 198         case DA9052_ID_18_19_REG:
 199         case DA9052_ID_20_21_REG:
 200         case DA9052_SEQ_STATUS_REG:
 201         case DA9052_SEQ_A_REG:
 202         case DA9052_SEQ_B_REG:
 203         case DA9052_SEQ_TIMER_REG:
 204         case DA9052_BUCKA_REG:
 205         case DA9052_BUCKB_REG:
 206         case DA9052_BUCKCORE_REG:
 207         case DA9052_BUCKPRO_REG:
 208         case DA9052_BUCKMEM_REG:
 209         case DA9052_BUCKPERI_REG:
 210         case DA9052_LDO1_REG:
 211         case DA9052_LDO2_REG:
 212         case DA9052_LDO3_REG:
 213         case DA9052_LDO4_REG:
 214         case DA9052_LDO5_REG:
 215         case DA9052_LDO6_REG:
 216         case DA9052_LDO7_REG:
 217         case DA9052_LDO8_REG:
 218         case DA9052_LDO9_REG:
 219         case DA9052_LDO10_REG:
 220         case DA9052_SUPPLY_REG:
 221         case DA9052_PULLDOWN_REG:
 222         case DA9052_CHGBUCK_REG:
 223         case DA9052_WAITCONT_REG:
 224         case DA9052_ISET_REG:
 225         case DA9052_BATCHG_REG:
 226         case DA9052_CHG_CONT_REG:
 227         case DA9052_INPUT_CONT_REG:
 228         case DA9052_BBAT_CONT_REG:
 229         case DA9052_BOOST_REG:
 230         case DA9052_LED_CONT_REG:
 231         case DA9052_LEDMIN123_REG:
 232         case DA9052_LED1_CONF_REG:
 233         case DA9052_LED2_CONF_REG:
 234         case DA9052_LED3_CONF_REG:
 235         case DA9052_LED1CONT_REG:
 236         case DA9052_LED2CONT_REG:
 237         case DA9052_LED3CONT_REG:
 238         case DA9052_LED_CONT_4_REG:
 239         case DA9052_LED_CONT_5_REG:
 240         case DA9052_ADC_MAN_REG:
 241         case DA9052_ADC_CONT_REG:
 242         case DA9052_ADC_RES_L_REG:
 243         case DA9052_ADC_RES_H_REG:
 244         case DA9052_VDD_RES_REG:
 245         case DA9052_VDD_MON_REG:
 246         case DA9052_ICHG_THD_REG:
 247         case DA9052_ICHG_END_REG:
 248         case DA9052_TBAT_HIGHP_REG:
 249         case DA9052_TBAT_HIGHN_REG:
 250         case DA9052_TBAT_LOW_REG:
 251         case DA9052_T_OFFSET_REG:
 252         case DA9052_AUTO4_HIGH_REG:
 253         case DA9052_AUTO4_LOW_REG:
 254         case DA9052_AUTO5_HIGH_REG:
 255         case DA9052_AUTO5_LOW_REG:
 256         case DA9052_AUTO6_HIGH_REG:
 257         case DA9052_AUTO6_LOW_REG:
 258         case DA9052_TSI_CONT_A_REG:
 259         case DA9052_TSI_CONT_B_REG:
 260         case DA9052_COUNT_S_REG:
 261         case DA9052_COUNT_MI_REG:
 262         case DA9052_COUNT_H_REG:
 263         case DA9052_COUNT_D_REG:
 264         case DA9052_COUNT_MO_REG:
 265         case DA9052_COUNT_Y_REG:
 266         case DA9052_ALARM_MI_REG:
 267         case DA9052_ALARM_H_REG:
 268         case DA9052_ALARM_D_REG:
 269         case DA9052_ALARM_MO_REG:
 270         case DA9052_ALARM_Y_REG:
 271         case DA9052_PAGE1_CON_REG:
 272                 return true;
 273         default:
 274                 return false;
 275         }
 276 }
 277
 278 static bool da9052_reg_volatile(struct device *dev, unsigned int reg)
 279 {
 280         switch (reg) {
 281         case DA9052_STATUS_A_REG:
 282         case DA9052_STATUS_B_REG:
 283         case DA9052_STATUS_C_REG:
 284         case DA9052_STATUS_D_REG:
 285         case DA9052_EVENT_A_REG:
 286         case DA9052_EVENT_B_REG:
 287         case DA9052_EVENT_C_REG:
 288         case DA9052_EVENT_D_REG:
 289         case DA9052_CONTROL_B_REG:
 290         case DA9052_CONTROL_D_REG:
 291         case DA9052_SUPPLY_REG:
 292         case DA9052_FAULTLOG_REG:
 293         case DA9052_CHG_TIME_REG:
 294         case DA9052_ADC_RES_L_REG:
 295         case DA9052_ADC_RES_H_REG:
 296         case DA9052_VDD_RES_REG:
 297         case DA9052_ICHG_AV_REG:
 298         case DA9052_TBAT_RES_REG:
 299         case DA9052_ADCIN4_RES_REG:
 300         case DA9052_ADCIN5_RES_REG:
 301         case DA9052_ADCIN6_RES_REG:
 302         case DA9052_TJUNC_RES_REG:
 303         case DA9052_TSI_X_MSB_REG:
 304         case DA9052_TSI_Y_MSB_REG:
 305         case DA9052_TSI_LSB_REG:
 306         case DA9052_TSI_Z_MSB_REG:
 307         case DA9052_COUNT_S_REG:
 308         case DA9052_COUNT_MI_REG:
 309         case DA9052_COUNT_H_REG:
 310         case DA9052_COUNT_D_REG:
 311         case DA9052_COUNT_MO_REG:
 312         case DA9052_COUNT_Y_REG:
 313         case DA9052_ALARM_MI_REG:
 314                 return true;
 315         default:
 316                 return false;
 317         }
 318 }
 319
 320 /*
 321  * TBAT look-up table is computed from the R90 reg (8 bit register)
 322  * reading as below. The battery temperature is in milliCentigrade
 323  * TBAT = (1/(t1+1/298) - 273) * 1000 mC
 324  * where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255))
 325  * Default values are R25 = 10e3, B = 3380, ITBAT = 50e-6
 326  * Example:
 327  * R25=10E3, B=3380, ITBAT=50e-6, ADCVAL=62d calculates
 328  * TBAT = 20015 mili degrees Centrigrade
 329  *
 330 */
 331 static const int32_t tbat_lookup[255] = {
 332         183258, 144221, 124334, 111336, 101826, 94397, 88343, 83257,
 333         78889, 75071, 71688, 68656, 65914, 63414, 61120, 59001,
 334         570366, 55204, 53490, 51881, 50364, 48931, 47574, 46285,
 335         45059, 43889, 42772, 41703, 40678, 39694, 38748, 37838,
 336         36961, 36115, 35297, 34507, 33743, 33002, 32284, 31588,
 337         30911, 30254, 29615, 28994, 28389, 27799, 27225, 26664,
 338         26117, 25584, 25062, 24553, 24054, 23567, 23091, 22624,
 339         22167, 21719, 21281, 20851, 20429, 20015, 19610, 19211,
 340         18820, 18436, 18058, 17688, 17323, 16965, 16612, 16266,
 341         15925, 15589, 15259, 14933, 14613, 14298, 13987, 13681,
 342         13379, 13082, 12788, 12499, 12214, 11933, 11655, 11382,
 343         11112, 10845, 10582, 10322, 10066, 9812, 9562, 9315,
 344         9071, 8830, 8591, 8356, 8123, 7893, 7665, 7440,
 345         7218, 6998, 6780, 6565, 6352, 6141, 5933, 5726,
 346         5522, 5320, 5120, 4922, 4726, 4532, 4340, 4149,
 347         3961, 3774, 3589, 3406, 3225, 3045, 2867, 2690,
 348         2516, 2342, 2170, 2000, 1831, 1664, 1498, 1334,
 349         1171, 1009, 849, 690, 532, 376, 221, 67,
 350         -84, -236, -386, -535, -683, -830, -975, -1119,
 351         -1263, -1405, -1546, -1686, -1825, -1964, -2101, -2237,
 352         -2372, -2506, -2639, -2771, -2902, -3033, -3162, -3291,
 353         -3418, -3545, -3671, -3796, -3920, -4044, -4166, -4288,
 354         -4409, -4529, -4649, -4767, -4885, -5002, -5119, -5235,
 355         -5349, -5464, -5577, -5690, -5802, -5913, -6024, -6134,
 356         -6244, -6352, -6461, -6568, -6675, -6781, -6887, -6992,
 357         -7096, -7200, -7303, -7406, -7508, -7609, -7710, -7810,
 358         -7910, -8009, -8108, -8206, -8304, -8401, -8497, -8593,
 359         -8689, -8784, -8878, -8972, -9066, -9159, -9251, -9343,
 360         -9435, -9526, -9617, -9707, -9796, -9886, -9975, -10063,
 361         -10151, -10238, -10325, -10412, -10839, -10923, -11007, -11090,
 362         -11173, -11256, -11338, -11420, -11501, -11583, -11663, -11744,
 363         -11823, -11903, -11982
 364 };
 365
 366 static const u8 chan_mux[DA9052_ADC_VBBAT + 1] = {
 367         [DA9052_ADC_VDDOUT]     = DA9052_ADC_MAN_MUXSEL_VDDOUT,
 368         [DA9052_ADC_ICH]        = DA9052_ADC_MAN_MUXSEL_ICH,
 369         [DA9052_ADC_TBAT]       = DA9052_ADC_MAN_MUXSEL_TBAT,
 370         [DA9052_ADC_VBAT]       = DA9052_ADC_MAN_MUXSEL_VBAT,
 371         [DA9052_ADC_IN4]        = DA9052_ADC_MAN_MUXSEL_AD4,
 372         [DA9052_ADC_IN5]        = DA9052_ADC_MAN_MUXSEL_AD5,
 373         [DA9052_ADC_IN6]        = DA9052_ADC_MAN_MUXSEL_AD6,
 374         [DA9052_ADC_VBBAT]      = DA9052_ADC_MAN_MUXSEL_VBBAT
 375 };
 376
 377 int da9052_adc_manual_read(struct da9052 *da9052, unsigned char channel)
 378 {
 379         int ret;
 380         unsigned short calc_data;
 381         unsigned short data;
 382         unsigned char mux_sel;
 383
 384         if (channel > DA9052_ADC_VBBAT)
 385                 return -EINVAL;
 386
 387         mutex_lock(&da9052->auxadc_lock);
 388
 389         /* Channel gets activated on enabling the Conversion bit */
 390         mux_sel = chan_mux[channel] | DA9052_ADC_MAN_MAN_CONV;
 391
 392         ret = da9052_reg_write(da9052, DA9052_ADC_MAN_REG, mux_sel);
 393         if (ret < 0)
 394                 goto err;
 395
 396         /* Wait for an interrupt */
 397         if (!wait_for_completion_timeout(&da9052->done,
 398                                          msecs_to_jiffies(500))) {
 399                 dev_err(da9052->dev,
 400                         "timeout waiting for ADC conversion interrupt\n");
 401                 ret = -ETIMEDOUT;
 402                 goto err;
 403         }
 404
 405         ret = da9052_reg_read(da9052, DA9052_ADC_RES_H_REG);
 406         if (ret < 0)
 407                 goto err;
 408
 409         calc_data = (unsigned short)ret;
 410         data = calc_data << 2;
 411
 412         ret = da9052_reg_read(da9052, DA9052_ADC_RES_L_REG);
 413         if (ret < 0)
 414                 goto err;
 415
 416         calc_data = (unsigned short)(ret & DA9052_ADC_RES_LSB);
 417         data |= calc_data;
 418
 419         ret = data;
 420
 421 err:
 422         mutex_unlock(&da9052->auxadc_lock);
 423         return ret;
 424 }
 425 EXPORT_SYMBOL_GPL(da9052_adc_manual_read);
 426
 427 int da9052_adc_read_temp(struct da9052 *da9052)
 428 {
 429         int tbat;
 430
 431         tbat = da9052_reg_read(da9052, DA9052_TBAT_RES_REG);
 432         if (tbat <= 0)
 433                 return tbat;
 434
 435         /* ARRAY_SIZE check is not needed since TBAT is a 8-bit register */
 436         return tbat_lookup[tbat - 1];
 437 }
 438 EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 439
 440 static const struct mfd_cell da9052_subdev_info[] = {
 441         {
 442                 .name = "da9052-regulator",
 443                 .id = 0,
 444         },
 445         {
 446                 .name = "da9052-regulator",
 447                 .id = 1,
 448         },
 449         {
 450                 .name = "da9052-regulator",
 451                 .id = 2,
 452         },
 453         {
 454                 .name = "da9052-regulator",
 455                 .id = 3,
 456         },
 457         {
 458                 .name = "da9052-regulator",
 459                 .id = 4,
 460         },
 461         {
 462                 .name = "da9052-regulator",
 463                 .id = 5,
 464         },
 465         {
 466                 .name = "da9052-regulator",
 467                 .id = 6,
 468         },
 469         {
 470                 .name = "da9052-regulator",
 471                 .id = 7,
 472         },
 473         {
 474                 .name = "da9052-regulator",
 475                 .id = 8,
 476         },
 477         {
 478                 .name = "da9052-regulator",
 479                 .id = 9,
 480         },
 481         {
 482                 .name = "da9052-regulator",
 483                 .id = 10,
 484         },
 485         {
 486                 .name = "da9052-regulator",
 487                 .id = 11,
 488         },
 489         {
 490                 .name = "da9052-regulator",
 491                 .id = 12,
 492         },
 493         {
 494                 .name = "da9052-regulator",
 495                 .id = 13,
 496         },
 497         {
 498                 .name = "da9052-onkey",
 499         },
 500         {
 501                 .name = "da9052-rtc",
 502         },
 503         {
 504                 .name = "da9052-gpio",
 505         },
 506         {
 507                 .name = "da9052-hwmon",
 508         },
 509         {
 510                 .name = "da9052-leds",
 511         },
 512         {
 513                 .name = "da9052-wled1",
 514         },
 515         {
 516                 .name = "da9052-wled2",
 517         },
 518         {
 519                 .name = "da9052-wled3",
 520         },
 521         {
 522                 .name = "da9052-tsi",
 523         },
 524         {
 525                 .name = "da9052-bat",
 526         },
 527         {
 528                 .name = "da9052-watchdog",
 529         },
 530 };
 531
 532 const struct regmap_config da9052_regmap_config = {
 533         .reg_bits = 8,
 534         .val_bits = 8,
 535
 536         .cache_type = REGCACHE_RBTREE,
 537
 538         .max_register = DA9052_PAGE1_CON_REG,
 539         .readable_reg = da9052_reg_readable,
 540         .writeable_reg = da9052_reg_writeable,
 541         .volatile_reg = da9052_reg_volatile,
 542 };
 543 EXPORT_SYMBOL_GPL(da9052_regmap_config);
 544
 545 static int da9052_clear_fault_log(struct da9052 *da9052)
 546 {
 547         int ret = 0;
 548         int fault_log = 0;
 549
 550         fault_log = da9052_reg_read(da9052, DA9052_FAULTLOG_REG);
 551         if (fault_log < 0) {
 552                 dev_err(da9052->dev,
 553                         "Cannot read FAULT_LOG %d\n", fault_log);
 554                 return fault_log;
 555         }
 556
 557         if (fault_log) {
 558                 if (fault_log & DA9052_FAULTLOG_TWDERROR)
 559                         dev_dbg(da9052->dev,
 560                                 "Fault log entry detected: TWD_ERROR\n");
 561                 if (fault_log & DA9052_FAULTLOG_VDDFAULT)
 562                         dev_dbg(da9052->dev,
 563                                 "Fault log entry detected: VDD_FAULT\n");
 564                 if (fault_log & DA9052_FAULTLOG_VDDSTART)
 565                         dev_dbg(da9052->dev,
 566                                 "Fault log entry detected: VDD_START\n");
 567                 if (fault_log & DA9052_FAULTLOG_TEMPOVER)
 568                         dev_dbg(da9052->dev,
 569                                 "Fault log entry detected: TEMP_OVER\n");
 570                 if (fault_log & DA9052_FAULTLOG_KEYSHUT)
 571                         dev_dbg(da9052->dev,
 572                                 "Fault log entry detected: KEY_SHUT\n");
 573                 if (fault_log & DA9052_FAULTLOG_NSDSET)
 574                         dev_dbg(da9052->dev,
 575                                 "Fault log entry detected: nSD_SHUT\n");
 576                 if (fault_log & DA9052_FAULTLOG_WAITSET)
 577                         dev_dbg(da9052->dev,
 578                                 "Fault log entry detected: WAIT_SHUT\n");
 579
 580                 ret = da9052_reg_write(da9052,
 581                                         DA9052_FAULTLOG_REG,
 582                                         0xFF);
 583                 if (ret < 0)
 584                         dev_err(da9052->dev,
 585                                 "Cannot reset FAULT_LOG values %d\n", ret);
 586         }
 587
 588         return ret;
 589 }
 590
 591 int da9052_device_init(struct da9052 *da9052, u8 chip_id)
 592 {
 593         struct da9052_pdata *pdata = dev_get_platdata(da9052->dev);
 594         int ret;
 595
 596         mutex_init(&da9052->auxadc_lock);
 597         init_completion(&da9052->done);
 598
 599         ret = da9052_clear_fault_log(da9052);
 600         if (ret < 0)
 601                 dev_warn(da9052->dev, "Cannot clear FAULT_LOG\n");
 602
 603         if (pdata && pdata->init != NULL)
 604                 pdata->init(da9052);
 605
 606         da9052->chip_id = chip_id;
 607
 608         ret = da9052_irq_init(da9052);
 609         if (ret != 0) {
 610                 dev_err(da9052->dev, "da9052_irq_init failed: %d\n", ret);
 611                 return ret;
 612         }
 613
 614         ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
 615                               da9052_subdev_info,
 616                               ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL);
 617         if (ret) {
 618                 dev_err(da9052->dev, "mfd_add_devices failed: %d\n", ret);
 619                 goto err;
 620         }
 621
 622         return 0;
 623
 624 err:
 625         da9052_irq_exit(da9052);
 626
 627         return ret;
 628 }
 629
 630 void da9052_device_exit(struct da9052 *da9052)
 631 {
 632         mfd_remove_devices(da9052->dev);
 633         da9052_irq_exit(da9052);
 634 }
 635
 636 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 637 MODULE_DESCRIPTION("DA9052 MFD Core");
 638 MODULE_LICENSE("GPL");