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 #include <linux/property.h>
  22
  23 #include <linux/mfd/da9052/da9052.h>
  24 #include <linux/mfd/da9052/pdata.h>
  25 #include <linux/mfd/da9052/reg.h>
  26
  27 static bool da9052_reg_readable(struct device *dev, unsigned int reg)
  28 {
  29         switch (reg) {
  30         case DA9052_PAGE0_CON_REG:
  31         case DA9052_STATUS_A_REG:
  32         case DA9052_STATUS_B_REG:
  33         case DA9052_STATUS_C_REG:
  34         case DA9052_STATUS_D_REG:
  35         case DA9052_EVENT_A_REG:
  36         case DA9052_EVENT_B_REG:
  37         case DA9052_EVENT_C_REG:
  38         case DA9052_EVENT_D_REG:
  39         case DA9052_FAULTLOG_REG:
  40         case DA9052_IRQ_MASK_A_REG:
  41         case DA9052_IRQ_MASK_B_REG:
  42         case DA9052_IRQ_MASK_C_REG:
  43         case DA9052_IRQ_MASK_D_REG:
  44         case DA9052_CONTROL_A_REG:
  45         case DA9052_CONTROL_B_REG:
  46         case DA9052_CONTROL_C_REG:
  47         case DA9052_CONTROL_D_REG:
  48         case DA9052_PDDIS_REG:
  49         case DA9052_INTERFACE_REG:
  50         case DA9052_RESET_REG:
  51         case DA9052_GPIO_0_1_REG:
  52         case DA9052_GPIO_2_3_REG:
  53         case DA9052_GPIO_4_5_REG:
  54         case DA9052_GPIO_6_7_REG:
  55         case DA9052_GPIO_8_9_REG:
  56         case DA9052_GPIO_10_11_REG:
  57         case DA9052_GPIO_12_13_REG:
  58         case DA9052_GPIO_14_15_REG:
  59         case DA9052_ID_0_1_REG:
  60         case DA9052_ID_2_3_REG:
  61         case DA9052_ID_4_5_REG:
  62         case DA9052_ID_6_7_REG:
  63         case DA9052_ID_8_9_REG:
  64         case DA9052_ID_10_11_REG:
  65         case DA9052_ID_12_13_REG:
  66         case DA9052_ID_14_15_REG:
  67         case DA9052_ID_16_17_REG:
  68         case DA9052_ID_18_19_REG:
  69         case DA9052_ID_20_21_REG:
  70         case DA9052_SEQ_STATUS_REG:
  71         case DA9052_SEQ_A_REG:
  72         case DA9052_SEQ_B_REG:
  73         case DA9052_SEQ_TIMER_REG:
  74         case DA9052_BUCKA_REG:
  75         case DA9052_BUCKB_REG:
  76         case DA9052_BUCKCORE_REG:
  77         case DA9052_BUCKPRO_REG:
  78         case DA9052_BUCKMEM_REG:
  79         case DA9052_BUCKPERI_REG:
  80         case DA9052_LDO1_REG:
  81         case DA9052_LDO2_REG:
  82         case DA9052_LDO3_REG:
  83         case DA9052_LDO4_REG:
  84         case DA9052_LDO5_REG:
  85         case DA9052_LDO6_REG:
  86         case DA9052_LDO7_REG:
  87         case DA9052_LDO8_REG:
  88         case DA9052_LDO9_REG:
  89         case DA9052_LDO10_REG:
  90         case DA9052_SUPPLY_REG:
  91         case DA9052_PULLDOWN_REG:
  92         case DA9052_CHGBUCK_REG:
  93         case DA9052_WAITCONT_REG:
  94         case DA9052_ISET_REG:
  95         case DA9052_BATCHG_REG:
  96         case DA9052_CHG_CONT_REG:
  97         case DA9052_INPUT_CONT_REG:
  98         case DA9052_CHG_TIME_REG:
  99         case DA9052_BBAT_CONT_REG:
 100         case DA9052_BOOST_REG:
 101         case DA9052_LED_CONT_REG:
 102         case DA9052_LEDMIN123_REG:
 103         case DA9052_LED1_CONF_REG:
 104         case DA9052_LED2_CONF_REG:
 105         case DA9052_LED3_CONF_REG:
 106         case DA9052_LED1CONT_REG:
 107         case DA9052_LED2CONT_REG:
 108         case DA9052_LED3CONT_REG:
 109         case DA9052_LED_CONT_4_REG:
 110         case DA9052_LED_CONT_5_REG:
 111         case DA9052_ADC_MAN_REG:
 112         case DA9052_ADC_CONT_REG:
 113         case DA9052_ADC_RES_L_REG:
 114         case DA9052_ADC_RES_H_REG:
 115         case DA9052_VDD_RES_REG:
 116         case DA9052_VDD_MON_REG:
 117         case DA9052_ICHG_AV_REG:
 118         case DA9052_ICHG_THD_REG:
 119         case DA9052_ICHG_END_REG:
 120         case DA9052_TBAT_RES_REG:
 121         case DA9052_TBAT_HIGHP_REG:
 122         case DA9052_TBAT_HIGHN_REG:
 123         case DA9052_TBAT_LOW_REG:
 124         case DA9052_T_OFFSET_REG:
 125         case DA9052_ADCIN4_RES_REG:
 126         case DA9052_AUTO4_HIGH_REG:
 127         case DA9052_AUTO4_LOW_REG:
 128         case DA9052_ADCIN5_RES_REG:
 129         case DA9052_AUTO5_HIGH_REG:
 130         case DA9052_AUTO5_LOW_REG:
 131         case DA9052_ADCIN6_RES_REG:
 132         case DA9052_AUTO6_HIGH_REG:
 133         case DA9052_AUTO6_LOW_REG:
 134         case DA9052_TJUNC_RES_REG:
 135         case DA9052_TSI_CONT_A_REG:
 136         case DA9052_TSI_CONT_B_REG:
 137         case DA9052_TSI_X_MSB_REG:
 138         case DA9052_TSI_Y_MSB_REG:
 139         case DA9052_TSI_LSB_REG:
 140         case DA9052_TSI_Z_MSB_REG:
 141         case DA9052_COUNT_S_REG:
 142         case DA9052_COUNT_MI_REG:
 143         case DA9052_COUNT_H_REG:
 144         case DA9052_COUNT_D_REG:
 145         case DA9052_COUNT_MO_REG:
 146         case DA9052_COUNT_Y_REG:
 147         case DA9052_ALARM_MI_REG:
 148         case DA9052_ALARM_H_REG:
 149         case DA9052_ALARM_D_REG:
 150         case DA9052_ALARM_MO_REG:
 151         case DA9052_ALARM_Y_REG:
 152         case DA9052_SECOND_A_REG:
 153         case DA9052_SECOND_B_REG:
 154         case DA9052_SECOND_C_REG:
 155         case DA9052_SECOND_D_REG:
 156         case DA9052_PAGE1_CON_REG:
 157                 return true;
 158         default:
 159                 return false;
 160         }
 161 }
 162
 163 static bool da9052_reg_writeable(struct device *dev, unsigned int reg)
 164 {
 165         switch (reg) {
 166         case DA9052_PAGE0_CON_REG:
 167         case DA9052_EVENT_A_REG:
 168         case DA9052_EVENT_B_REG:
 169         case DA9052_EVENT_C_REG:
 170         case DA9052_EVENT_D_REG:
 171         case DA9052_FAULTLOG_REG:
 172         case DA9052_IRQ_MASK_A_REG:
 173         case DA9052_IRQ_MASK_B_REG:
 174         case DA9052_IRQ_MASK_C_REG:
 175         case DA9052_IRQ_MASK_D_REG:
 176         case DA9052_CONTROL_A_REG:
 177         case DA9052_CONTROL_B_REG:
 178         case DA9052_CONTROL_C_REG:
 179         case DA9052_CONTROL_D_REG:
 180         case DA9052_PDDIS_REG:
 181         case DA9052_RESET_REG:
 182         case DA9052_GPIO_0_1_REG:
 183         case DA9052_GPIO_2_3_REG:
 184         case DA9052_GPIO_4_5_REG:
 185         case DA9052_GPIO_6_7_REG:
 186         case DA9052_GPIO_8_9_REG:
 187         case DA9052_GPIO_10_11_REG:
 188         case DA9052_GPIO_12_13_REG:
 189         case DA9052_GPIO_14_15_REG:
 190         case DA9052_ID_0_1_REG:
 191         case DA9052_ID_2_3_REG:
 192         case DA9052_ID_4_5_REG:
 193         case DA9052_ID_6_7_REG:
 194         case DA9052_ID_8_9_REG:
 195         case DA9052_ID_10_11_REG:
 196         case DA9052_ID_12_13_REG:
 197         case DA9052_ID_14_15_REG:
 198         case DA9052_ID_16_17_REG:
 199         case DA9052_ID_18_19_REG:
 200         case DA9052_ID_20_21_REG:
 201         case DA9052_SEQ_STATUS_REG:
 202         case DA9052_SEQ_A_REG:
 203         case DA9052_SEQ_B_REG:
 204         case DA9052_SEQ_TIMER_REG:
 205         case DA9052_BUCKA_REG:
 206         case DA9052_BUCKB_REG:
 207         case DA9052_BUCKCORE_REG:
 208         case DA9052_BUCKPRO_REG:
 209         case DA9052_BUCKMEM_REG:
 210         case DA9052_BUCKPERI_REG:
 211         case DA9052_LDO1_REG:
 212         case DA9052_LDO2_REG:
 213         case DA9052_LDO3_REG:
 214         case DA9052_LDO4_REG:
 215         case DA9052_LDO5_REG:
 216         case DA9052_LDO6_REG:
 217         case DA9052_LDO7_REG:
 218         case DA9052_LDO8_REG:
 219         case DA9052_LDO9_REG:
 220         case DA9052_LDO10_REG:
 221         case DA9052_SUPPLY_REG:
 222         case DA9052_PULLDOWN_REG:
 223         case DA9052_CHGBUCK_REG:
 224         case DA9052_WAITCONT_REG:
 225         case DA9052_ISET_REG:
 226         case DA9052_BATCHG_REG:
 227         case DA9052_CHG_CONT_REG:
 228         case DA9052_INPUT_CONT_REG:
 229         case DA9052_BBAT_CONT_REG:
 230         case DA9052_BOOST_REG:
 231         case DA9052_LED_CONT_REG:
 232         case DA9052_LEDMIN123_REG:
 233         case DA9052_LED1_CONF_REG:
 234         case DA9052_LED2_CONF_REG:
 235         case DA9052_LED3_CONF_REG:
 236         case DA9052_LED1CONT_REG:
 237         case DA9052_LED2CONT_REG:
 238         case DA9052_LED3CONT_REG:
 239         case DA9052_LED_CONT_4_REG:
 240         case DA9052_LED_CONT_5_REG:
 241         case DA9052_ADC_MAN_REG:
 242         case DA9052_ADC_CONT_REG:
 243         case DA9052_ADC_RES_L_REG:
 244         case DA9052_ADC_RES_H_REG:
 245         case DA9052_VDD_RES_REG:
 246         case DA9052_VDD_MON_REG:
 247         case DA9052_ICHG_THD_REG:
 248         case DA9052_ICHG_END_REG:
 249         case DA9052_TBAT_HIGHP_REG:
 250         case DA9052_TBAT_HIGHN_REG:
 251         case DA9052_TBAT_LOW_REG:
 252         case DA9052_T_OFFSET_REG:
 253         case DA9052_AUTO4_HIGH_REG:
 254         case DA9052_AUTO4_LOW_REG:
 255         case DA9052_AUTO5_HIGH_REG:
 256         case DA9052_AUTO5_LOW_REG:
 257         case DA9052_AUTO6_HIGH_REG:
 258         case DA9052_AUTO6_LOW_REG:
 259         case DA9052_TSI_CONT_A_REG:
 260         case DA9052_TSI_CONT_B_REG:
 261         case DA9052_COUNT_S_REG:
 262         case DA9052_COUNT_MI_REG:
 263         case DA9052_COUNT_H_REG:
 264         case DA9052_COUNT_D_REG:
 265         case DA9052_COUNT_MO_REG:
 266         case DA9052_COUNT_Y_REG:
 267         case DA9052_ALARM_MI_REG:
 268         case DA9052_ALARM_H_REG:
 269         case DA9052_ALARM_D_REG:
 270         case DA9052_ALARM_MO_REG:
 271         case DA9052_ALARM_Y_REG:
 272         case DA9052_PAGE1_CON_REG:
 273                 return true;
 274         default:
 275                 return false;
 276         }
 277 }
 278
 279 static bool da9052_reg_volatile(struct device *dev, unsigned int reg)
 280 {
 281         switch (reg) {
 282         case DA9052_STATUS_A_REG:
 283         case DA9052_STATUS_B_REG:
 284         case DA9052_STATUS_C_REG:
 285         case DA9052_STATUS_D_REG:
 286         case DA9052_EVENT_A_REG:
 287         case DA9052_EVENT_B_REG:
 288         case DA9052_EVENT_C_REG:
 289         case DA9052_EVENT_D_REG:
 290         case DA9052_CONTROL_B_REG:
 291         case DA9052_CONTROL_D_REG:
 292         case DA9052_SUPPLY_REG:
 293         case DA9052_FAULTLOG_REG:
 294         case DA9052_CHG_TIME_REG:
 295         case DA9052_ADC_RES_L_REG:
 296         case DA9052_ADC_RES_H_REG:
 297         case DA9052_VDD_RES_REG:
 298         case DA9052_ICHG_AV_REG:
 299         case DA9052_TBAT_RES_REG:
 300         case DA9052_ADCIN4_RES_REG:
 301         case DA9052_ADCIN5_RES_REG:
 302         case DA9052_ADCIN6_RES_REG:
 303         case DA9052_TJUNC_RES_REG:
 304         case DA9052_TSI_X_MSB_REG:
 305         case DA9052_TSI_Y_MSB_REG:
 306         case DA9052_TSI_LSB_REG:
 307         case DA9052_TSI_Z_MSB_REG:
 308         case DA9052_COUNT_S_REG:
 309         case DA9052_COUNT_MI_REG:
 310         case DA9052_COUNT_H_REG:
 311         case DA9052_COUNT_D_REG:
 312         case DA9052_COUNT_MO_REG:
 313         case DA9052_COUNT_Y_REG:
 314         case DA9052_ALARM_MI_REG:
 315                 return true;
 316         default:
 317                 return false;
 318         }
 319 }
 320
 321 /*
 322  * TBAT look-up table is computed from the R90 reg (8 bit register)
 323  * reading as below. The battery temperature is in milliCentigrade
 324  * TBAT = (1/(t1+1/298) - 273) * 1000 mC
 325  * where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255))
 326  * Default values are R25 = 10e3, B = 3380, ITBAT = 50e-6
 327  * Example:
 328  * R25=10E3, B=3380, ITBAT=50e-6, ADCVAL=62d calculates
 329  * TBAT = 20015 mili degrees Centrigrade
 330  *
 331 */
 332 static const int32_t tbat_lookup[255] = {
 333         183258, 144221, 124334, 111336, 101826, 94397, 88343, 83257,
 334         78889, 75071, 71688, 68656, 65914, 63414, 61120, 59001,
 335         570366, 55204, 53490, 51881, 50364, 48931, 47574, 46285,
 336         45059, 43889, 42772, 41703, 40678, 39694, 38748, 37838,
 337         36961, 36115, 35297, 34507, 33743, 33002, 32284, 31588,
 338         30911, 30254, 29615, 28994, 28389, 27799, 27225, 26664,
 339         26117, 25584, 25062, 24553, 24054, 23567, 23091, 22624,
 340         22167, 21719, 21281, 20851, 20429, 20015, 19610, 19211,
 341         18820, 18436, 18058, 17688, 17323, 16965, 16612, 16266,
 342         15925, 15589, 15259, 14933, 14613, 14298, 13987, 13681,
 343         13379, 13082, 12788, 12499, 12214, 11933, 11655, 11382,
 344         11112, 10845, 10582, 10322, 10066, 9812, 9562, 9315,
 345         9071, 8830, 8591, 8356, 8123, 7893, 7665, 7440,
 346         7218, 6998, 6780, 6565, 6352, 6141, 5933, 5726,
 347         5522, 5320, 5120, 4922, 4726, 4532, 4340, 4149,
 348         3961, 3774, 3589, 3406, 3225, 3045, 2867, 2690,
 349         2516, 2342, 2170, 2000, 1831, 1664, 1498, 1334,
 350         1171, 1009, 849, 690, 532, 376, 221, 67,
 351         -84, -236, -386, -535, -683, -830, -975, -1119,
 352         -1263, -1405, -1546, -1686, -1825, -1964, -2101, -2237,
 353         -2372, -2506, -2639, -2771, -2902, -3033, -3162, -3291,
 354         -3418, -3545, -3671, -3796, -3920, -4044, -4166, -4288,
 355         -4409, -4529, -4649, -4767, -4885, -5002, -5119, -5235,
 356         -5349, -5464, -5577, -5690, -5802, -5913, -6024, -6134,
 357         -6244, -6352, -6461, -6568, -6675, -6781, -6887, -6992,
 358         -7096, -7200, -7303, -7406, -7508, -7609, -7710, -7810,
 359         -7910, -8009, -8108, -8206, -8304, -8401, -8497, -8593,
 360         -8689, -8784, -8878, -8972, -9066, -9159, -9251, -9343,
 361         -9435, -9526, -9617, -9707, -9796, -9886, -9975, -10063,
 362         -10151, -10238, -10325, -10412, -10839, -10923, -11007, -11090,
 363         -11173, -11256, -11338, -11420, -11501, -11583, -11663, -11744,
 364         -11823, -11903, -11982
 365 };
 366
 367 static const u8 chan_mux[DA9052_ADC_VBBAT + 1] = {
 368         [DA9052_ADC_VDDOUT]     = DA9052_ADC_MAN_MUXSEL_VDDOUT,
 369         [DA9052_ADC_ICH]        = DA9052_ADC_MAN_MUXSEL_ICH,
 370         [DA9052_ADC_TBAT]       = DA9052_ADC_MAN_MUXSEL_TBAT,
 371         [DA9052_ADC_VBAT]       = DA9052_ADC_MAN_MUXSEL_VBAT,
 372         [DA9052_ADC_IN4]        = DA9052_ADC_MAN_MUXSEL_AD4,
 373         [DA9052_ADC_IN5]        = DA9052_ADC_MAN_MUXSEL_AD5,
 374         [DA9052_ADC_IN6]        = DA9052_ADC_MAN_MUXSEL_AD6,
 375         [DA9052_ADC_VBBAT]      = DA9052_ADC_MAN_MUXSEL_VBBAT
 376 };
 377
 378 int da9052_adc_manual_read(struct da9052 *da9052, unsigned char channel)
 379 {
 380         int ret;
 381         unsigned short calc_data;
 382         unsigned short data;
 383         unsigned char mux_sel;
 384
 385         if (channel > DA9052_ADC_VBBAT)
 386                 return -EINVAL;
 387
 388         mutex_lock(&da9052->auxadc_lock);
 389
 390         reinit_completion(&da9052->done);
 391
 392         /* Channel gets activated on enabling the Conversion bit */
 393         mux_sel = chan_mux[channel] | DA9052_ADC_MAN_MAN_CONV;
 394
 395         ret = da9052_reg_write(da9052, DA9052_ADC_MAN_REG, mux_sel);
 396         if (ret < 0)
 397                 goto err;
 398
 399         /* Wait for an interrupt */
 400         if (!wait_for_completion_timeout(&da9052->done,
 401                                          msecs_to_jiffies(500))) {
 402                 dev_err(da9052->dev,
 403                         "timeout waiting for ADC conversion interrupt\n");
 404                 ret = -ETIMEDOUT;
 405                 goto err;
 406         }
 407
 408         ret = da9052_reg_read(da9052, DA9052_ADC_RES_H_REG);
 409         if (ret < 0)
 410                 goto err;
 411
 412         calc_data = (unsigned short)ret;
 413         data = calc_data << 2;
 414
 415         ret = da9052_reg_read(da9052, DA9052_ADC_RES_L_REG);
 416         if (ret < 0)
 417                 goto err;
 418
 419         calc_data = (unsigned short)(ret & DA9052_ADC_RES_LSB);
 420         data |= calc_data;
 421
 422         ret = data;
 423
 424 err:
 425         mutex_unlock(&da9052->auxadc_lock);
 426         return ret;
 427 }
 428 EXPORT_SYMBOL_GPL(da9052_adc_manual_read);
 429
 430 int da9052_adc_read_temp(struct da9052 *da9052)
 431 {
 432         int tbat;
 433
 434         tbat = da9052_reg_read(da9052, DA9052_TBAT_RES_REG);
 435         if (tbat <= 0)
 436                 return tbat;
 437
 438         /* ARRAY_SIZE check is not needed since TBAT is a 8-bit register */
 439         return tbat_lookup[tbat - 1];
 440 }
 441 EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 442
 443 static const struct mfd_cell da9052_subdev_info[] = {
 444         {
 445                 .name = "da9052-regulator",
 446                 .id = 0,
 447         },
 448         {
 449                 .name = "da9052-regulator",
 450                 .id = 1,
 451         },
 452         {
 453                 .name = "da9052-regulator",
 454                 .id = 2,
 455         },
 456         {
 457                 .name = "da9052-regulator",
 458                 .id = 3,
 459         },
 460         {
 461                 .name = "da9052-regulator",
 462                 .id = 4,
 463         },
 464         {
 465                 .name = "da9052-regulator",
 466                 .id = 5,
 467         },
 468         {
 469                 .name = "da9052-regulator",
 470                 .id = 6,
 471         },
 472         {
 473                 .name = "da9052-regulator",
 474                 .id = 7,
 475         },
 476         {
 477                 .name = "da9052-regulator",
 478                 .id = 8,
 479         },
 480         {
 481                 .name = "da9052-regulator",
 482                 .id = 9,
 483         },
 484         {
 485                 .name = "da9052-regulator",
 486                 .id = 10,
 487         },
 488         {
 489                 .name = "da9052-regulator",
 490                 .id = 11,
 491         },
 492         {
 493                 .name = "da9052-regulator",
 494                 .id = 12,
 495         },
 496         {
 497                 .name = "da9052-regulator",
 498                 .id = 13,
 499         },
 500         {
 501                 .name = "da9052-onkey",
 502         },
 503         {
 504                 .name = "da9052-rtc",
 505         },
 506         {
 507                 .name = "da9052-gpio",
 508         },
 509         {
 510                 .name = "da9052-hwmon",
 511         },
 512         {
 513                 .name = "da9052-leds",
 514         },
 515         {
 516                 .name = "da9052-wled1",
 517         },
 518         {
 519                 .name = "da9052-wled2",
 520         },
 521         {
 522                 .name = "da9052-wled3",
 523         },
 524         {
 525                 .name = "da9052-bat",
 526         },
 527         {
 528                 .name = "da9052-watchdog",
 529         },
 530 };
 531
 532 static const struct mfd_cell da9052_tsi_subdev_info[] = {
 533         { .name = "da9052-tsi" },
 534 };
 535
 536 const struct regmap_config da9052_regmap_config = {
 537         .reg_bits = 8,
 538         .val_bits = 8,
 539
 540         .cache_type = REGCACHE_RBTREE,
 541
 542         .max_register = DA9052_PAGE1_CON_REG,
 543         .readable_reg = da9052_reg_readable,
 544         .writeable_reg = da9052_reg_writeable,
 545         .volatile_reg = da9052_reg_volatile,
 546 };
 547 EXPORT_SYMBOL_GPL(da9052_regmap_config);
 548
 549 static int da9052_clear_fault_log(struct da9052 *da9052)
 550 {
 551         int ret = 0;
 552         int fault_log = 0;
 553
 554         fault_log = da9052_reg_read(da9052, DA9052_FAULTLOG_REG);
 555         if (fault_log < 0) {
 556                 dev_err(da9052->dev,
 557                         "Cannot read FAULT_LOG %d\n", fault_log);
 558                 return fault_log;
 559         }
 560
 561         if (fault_log) {
 562                 if (fault_log & DA9052_FAULTLOG_TWDERROR)
 563                         dev_dbg(da9052->dev,
 564                                 "Fault log entry detected: TWD_ERROR\n");
 565                 if (fault_log & DA9052_FAULTLOG_VDDFAULT)
 566                         dev_dbg(da9052->dev,
 567                                 "Fault log entry detected: VDD_FAULT\n");
 568                 if (fault_log & DA9052_FAULTLOG_VDDSTART)
 569                         dev_dbg(da9052->dev,
 570                                 "Fault log entry detected: VDD_START\n");
 571                 if (fault_log & DA9052_FAULTLOG_TEMPOVER)
 572                         dev_dbg(da9052->dev,
 573                                 "Fault log entry detected: TEMP_OVER\n");
 574                 if (fault_log & DA9052_FAULTLOG_KEYSHUT)
 575                         dev_dbg(da9052->dev,
 576                                 "Fault log entry detected: KEY_SHUT\n");
 577                 if (fault_log & DA9052_FAULTLOG_NSDSET)
 578                         dev_dbg(da9052->dev,
 579                                 "Fault log entry detected: nSD_SHUT\n");
 580                 if (fault_log & DA9052_FAULTLOG_WAITSET)
 581                         dev_dbg(da9052->dev,
 582                                 "Fault log entry detected: WAIT_SHUT\n");
 583
 584                 ret = da9052_reg_write(da9052,
 585                                         DA9052_FAULTLOG_REG,
 586                                         0xFF);
 587                 if (ret < 0)
 588                         dev_err(da9052->dev,
 589                                 "Cannot reset FAULT_LOG values %d\n", ret);
 590         }
 591
 592         return ret;
 593 }
 594
 595 int da9052_device_init(struct da9052 *da9052, u8 chip_id)
 596 {
 597         struct da9052_pdata *pdata = dev_get_platdata(da9052->dev);
 598         int ret;
 599
 600         mutex_init(&da9052->auxadc_lock);
 601         init_completion(&da9052->done);
 602
 603         ret = da9052_clear_fault_log(da9052);
 604         if (ret < 0)
 605                 dev_warn(da9052->dev, "Cannot clear FAULT_LOG\n");
 606
 607         if (pdata && pdata->init != NULL)
 608                 pdata->init(da9052);
 609
 610         da9052->chip_id = chip_id;
 611
 612         ret = da9052_irq_init(da9052);
 613         if (ret != 0) {
 614                 dev_err(da9052->dev, "da9052_irq_init failed: %d\n", ret);
 615                 return ret;
 616         }
 617
 618         ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
 619                               da9052_subdev_info,
 620                               ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL);
 621         if (ret) {
 622                 dev_err(da9052->dev, "mfd_add_devices failed: %d\n", ret);
 623                 goto err;
 624         }
 625
 626         /*
 627          * Check if touchscreen pins are used are analogue input instead
 628          * of having a touchscreen connected to them. The analogue input
 629          * functionality will be provided by hwmon driver (if enabled).
 630          */
 631         if (!device_property_read_bool(da9052->dev, "dlg,tsi-as-adc")) {
 632                 ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
 633                                       da9052_tsi_subdev_info,
 634                                       ARRAY_SIZE(da9052_tsi_subdev_info),
 635                                       NULL, 0, NULL);
 636                 if (ret) {
 637                         dev_err(da9052->dev, "failed to add TSI subdev: %d\n",
 638                                 ret);
 639                         goto err;
 640                 }
 641         }
 642
 643         return 0;
 644
 645 err:
 646         mfd_remove_devices(da9052->dev);
 647         da9052_irq_exit(da9052);
 648
 649         return ret;
 650 }
 651
 652 void da9052_device_exit(struct da9052 *da9052)
 653 {
 654         mfd_remove_devices(da9052->dev);
 655         da9052_irq_exit(da9052);
 656 }
 657
 658 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 659 MODULE_DESCRIPTION("DA9052 MFD Core");
 660 MODULE_LICENSE("GPL");