linux/drivers/mfd/da9052-core.c
<<
>>
Prefs
   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Device access for Dialog DA9052 PMICs.
   4 *
   5 * Copyright(c) 2011 Dialog Semiconductor Ltd.
   6 *
   7 * Author: David Dajun Chen <dchen@diasemi.com>
   8 */
   9
  10#include <linux/device.h>
  11#include <linux/delay.h>
  12#include <linux/input.h>
  13#include <linux/interrupt.h>
  14#include <linux/mfd/core.h>
  15#include <linux/slab.h>
  16#include <linux/module.h>
  17#include <linux/property.h>
  18
  19#include <linux/mfd/da9052/da9052.h>
  20#include <linux/mfd/da9052/pdata.h>
  21#include <linux/mfd/da9052/reg.h>
  22
  23static bool da9052_reg_readable(struct device *dev, unsigned int reg)
  24{
  25        switch (reg) {
  26        case DA9052_PAGE0_CON_REG:
  27        case DA9052_STATUS_A_REG:
  28        case DA9052_STATUS_B_REG:
  29        case DA9052_STATUS_C_REG:
  30        case DA9052_STATUS_D_REG:
  31        case DA9052_EVENT_A_REG:
  32        case DA9052_EVENT_B_REG:
  33        case DA9052_EVENT_C_REG:
  34        case DA9052_EVENT_D_REG:
  35        case DA9052_FAULTLOG_REG:
  36        case DA9052_IRQ_MASK_A_REG:
  37        case DA9052_IRQ_MASK_B_REG:
  38        case DA9052_IRQ_MASK_C_REG:
  39        case DA9052_IRQ_MASK_D_REG:
  40        case DA9052_CONTROL_A_REG:
  41        case DA9052_CONTROL_B_REG:
  42        case DA9052_CONTROL_C_REG:
  43        case DA9052_CONTROL_D_REG:
  44        case DA9052_PDDIS_REG:
  45        case DA9052_INTERFACE_REG:
  46        case DA9052_RESET_REG:
  47        case DA9052_GPIO_0_1_REG:
  48        case DA9052_GPIO_2_3_REG:
  49        case DA9052_GPIO_4_5_REG:
  50        case DA9052_GPIO_6_7_REG:
  51        case DA9052_GPIO_8_9_REG:
  52        case DA9052_GPIO_10_11_REG:
  53        case DA9052_GPIO_12_13_REG:
  54        case DA9052_GPIO_14_15_REG:
  55        case DA9052_ID_0_1_REG:
  56        case DA9052_ID_2_3_REG:
  57        case DA9052_ID_4_5_REG:
  58        case DA9052_ID_6_7_REG:
  59        case DA9052_ID_8_9_REG:
  60        case DA9052_ID_10_11_REG:
  61        case DA9052_ID_12_13_REG:
  62        case DA9052_ID_14_15_REG:
  63        case DA9052_ID_16_17_REG:
  64        case DA9052_ID_18_19_REG:
  65        case DA9052_ID_20_21_REG:
  66        case DA9052_SEQ_STATUS_REG:
  67        case DA9052_SEQ_A_REG:
  68        case DA9052_SEQ_B_REG:
  69        case DA9052_SEQ_TIMER_REG:
  70        case DA9052_BUCKA_REG:
  71        case DA9052_BUCKB_REG:
  72        case DA9052_BUCKCORE_REG:
  73        case DA9052_BUCKPRO_REG:
  74        case DA9052_BUCKMEM_REG:
  75        case DA9052_BUCKPERI_REG:
  76        case DA9052_LDO1_REG:
  77        case DA9052_LDO2_REG:
  78        case DA9052_LDO3_REG:
  79        case DA9052_LDO4_REG:
  80        case DA9052_LDO5_REG:
  81        case DA9052_LDO6_REG:
  82        case DA9052_LDO7_REG:
  83        case DA9052_LDO8_REG:
  84        case DA9052_LDO9_REG:
  85        case DA9052_LDO10_REG:
  86        case DA9052_SUPPLY_REG:
  87        case DA9052_PULLDOWN_REG:
  88        case DA9052_CHGBUCK_REG:
  89        case DA9052_WAITCONT_REG:
  90        case DA9052_ISET_REG:
  91        case DA9052_BATCHG_REG:
  92        case DA9052_CHG_CONT_REG:
  93        case DA9052_INPUT_CONT_REG:
  94        case DA9052_CHG_TIME_REG:
  95        case DA9052_BBAT_CONT_REG:
  96        case DA9052_BOOST_REG:
  97        case DA9052_LED_CONT_REG:
  98        case DA9052_LEDMIN123_REG:
  99        case DA9052_LED1_CONF_REG:
 100        case DA9052_LED2_CONF_REG:
 101        case DA9052_LED3_CONF_REG:
 102        case DA9052_LED1CONT_REG:
 103        case DA9052_LED2CONT_REG:
 104        case DA9052_LED3CONT_REG:
 105        case DA9052_LED_CONT_4_REG:
 106        case DA9052_LED_CONT_5_REG:
 107        case DA9052_ADC_MAN_REG:
 108        case DA9052_ADC_CONT_REG:
 109        case DA9052_ADC_RES_L_REG:
 110        case DA9052_ADC_RES_H_REG:
 111        case DA9052_VDD_RES_REG:
 112        case DA9052_VDD_MON_REG:
 113        case DA9052_ICHG_AV_REG:
 114        case DA9052_ICHG_THD_REG:
 115        case DA9052_ICHG_END_REG:
 116        case DA9052_TBAT_RES_REG:
 117        case DA9052_TBAT_HIGHP_REG:
 118        case DA9052_TBAT_HIGHN_REG:
 119        case DA9052_TBAT_LOW_REG:
 120        case DA9052_T_OFFSET_REG:
 121        case DA9052_ADCIN4_RES_REG:
 122        case DA9052_AUTO4_HIGH_REG:
 123        case DA9052_AUTO4_LOW_REG:
 124        case DA9052_ADCIN5_RES_REG:
 125        case DA9052_AUTO5_HIGH_REG:
 126        case DA9052_AUTO5_LOW_REG:
 127        case DA9052_ADCIN6_RES_REG:
 128        case DA9052_AUTO6_HIGH_REG:
 129        case DA9052_AUTO6_LOW_REG:
 130        case DA9052_TJUNC_RES_REG:
 131        case DA9052_TSI_CONT_A_REG:
 132        case DA9052_TSI_CONT_B_REG:
 133        case DA9052_TSI_X_MSB_REG:
 134        case DA9052_TSI_Y_MSB_REG:
 135        case DA9052_TSI_LSB_REG:
 136        case DA9052_TSI_Z_MSB_REG:
 137        case DA9052_COUNT_S_REG:
 138        case DA9052_COUNT_MI_REG:
 139        case DA9052_COUNT_H_REG:
 140        case DA9052_COUNT_D_REG:
 141        case DA9052_COUNT_MO_REG:
 142        case DA9052_COUNT_Y_REG:
 143        case DA9052_ALARM_MI_REG:
 144        case DA9052_ALARM_H_REG:
 145        case DA9052_ALARM_D_REG:
 146        case DA9052_ALARM_MO_REG:
 147        case DA9052_ALARM_Y_REG:
 148        case DA9052_SECOND_A_REG:
 149        case DA9052_SECOND_B_REG:
 150        case DA9052_SECOND_C_REG:
 151        case DA9052_SECOND_D_REG:
 152        case DA9052_PAGE1_CON_REG:
 153                return true;
 154        default:
 155                return false;
 156        }
 157}
 158
 159static bool da9052_reg_writeable(struct device *dev, unsigned int reg)
 160{
 161        switch (reg) {
 162        case DA9052_PAGE0_CON_REG:
 163        case DA9052_EVENT_A_REG:
 164        case DA9052_EVENT_B_REG:
 165        case DA9052_EVENT_C_REG:
 166        case DA9052_EVENT_D_REG:
 167        case DA9052_FAULTLOG_REG:
 168        case DA9052_IRQ_MASK_A_REG:
 169        case DA9052_IRQ_MASK_B_REG:
 170        case DA9052_IRQ_MASK_C_REG:
 171        case DA9052_IRQ_MASK_D_REG:
 172        case DA9052_CONTROL_A_REG:
 173        case DA9052_CONTROL_B_REG:
 174        case DA9052_CONTROL_C_REG:
 175        case DA9052_CONTROL_D_REG:
 176        case DA9052_PDDIS_REG:
 177        case DA9052_RESET_REG:
 178        case DA9052_GPIO_0_1_REG:
 179        case DA9052_GPIO_2_3_REG:
 180        case DA9052_GPIO_4_5_REG:
 181        case DA9052_GPIO_6_7_REG:
 182        case DA9052_GPIO_8_9_REG:
 183        case DA9052_GPIO_10_11_REG:
 184        case DA9052_GPIO_12_13_REG:
 185        case DA9052_GPIO_14_15_REG:
 186        case DA9052_ID_0_1_REG:
 187        case DA9052_ID_2_3_REG:
 188        case DA9052_ID_4_5_REG:
 189        case DA9052_ID_6_7_REG:
 190        case DA9052_ID_8_9_REG:
 191        case DA9052_ID_10_11_REG:
 192        case DA9052_ID_12_13_REG:
 193        case DA9052_ID_14_15_REG:
 194        case DA9052_ID_16_17_REG:
 195        case DA9052_ID_18_19_REG:
 196        case DA9052_ID_20_21_REG:
 197        case DA9052_SEQ_STATUS_REG:
 198        case DA9052_SEQ_A_REG:
 199        case DA9052_SEQ_B_REG:
 200        case DA9052_SEQ_TIMER_REG:
 201        case DA9052_BUCKA_REG:
 202        case DA9052_BUCKB_REG:
 203        case DA9052_BUCKCORE_REG:
 204        case DA9052_BUCKPRO_REG:
 205        case DA9052_BUCKMEM_REG:
 206        case DA9052_BUCKPERI_REG:
 207        case DA9052_LDO1_REG:
 208        case DA9052_LDO2_REG:
 209        case DA9052_LDO3_REG:
 210        case DA9052_LDO4_REG:
 211        case DA9052_LDO5_REG:
 212        case DA9052_LDO6_REG:
 213        case DA9052_LDO7_REG:
 214        case DA9052_LDO8_REG:
 215        case DA9052_LDO9_REG:
 216        case DA9052_LDO10_REG:
 217        case DA9052_SUPPLY_REG:
 218        case DA9052_PULLDOWN_REG:
 219        case DA9052_CHGBUCK_REG:
 220        case DA9052_WAITCONT_REG:
 221        case DA9052_ISET_REG:
 222        case DA9052_BATCHG_REG:
 223        case DA9052_CHG_CONT_REG:
 224        case DA9052_INPUT_CONT_REG:
 225        case DA9052_BBAT_CONT_REG:
 226        case DA9052_BOOST_REG:
 227        case DA9052_LED_CONT_REG:
 228        case DA9052_LEDMIN123_REG:
 229        case DA9052_LED1_CONF_REG:
 230        case DA9052_LED2_CONF_REG:
 231        case DA9052_LED3_CONF_REG:
 232        case DA9052_LED1CONT_REG:
 233        case DA9052_LED2CONT_REG:
 234        case DA9052_LED3CONT_REG:
 235        case DA9052_LED_CONT_4_REG:
 236        case DA9052_LED_CONT_5_REG:
 237        case DA9052_ADC_MAN_REG:
 238        case DA9052_ADC_CONT_REG:
 239        case DA9052_ADC_RES_L_REG:
 240        case DA9052_ADC_RES_H_REG:
 241        case DA9052_VDD_RES_REG:
 242        case DA9052_VDD_MON_REG:
 243        case DA9052_ICHG_THD_REG:
 244        case DA9052_ICHG_END_REG:
 245        case DA9052_TBAT_HIGHP_REG:
 246        case DA9052_TBAT_HIGHN_REG:
 247        case DA9052_TBAT_LOW_REG:
 248        case DA9052_T_OFFSET_REG:
 249        case DA9052_AUTO4_HIGH_REG:
 250        case DA9052_AUTO4_LOW_REG:
 251        case DA9052_AUTO5_HIGH_REG:
 252        case DA9052_AUTO5_LOW_REG:
 253        case DA9052_AUTO6_HIGH_REG:
 254        case DA9052_AUTO6_LOW_REG:
 255        case DA9052_TSI_CONT_A_REG:
 256        case DA9052_TSI_CONT_B_REG:
 257        case DA9052_COUNT_S_REG:
 258        case DA9052_COUNT_MI_REG:
 259        case DA9052_COUNT_H_REG:
 260        case DA9052_COUNT_D_REG:
 261        case DA9052_COUNT_MO_REG:
 262        case DA9052_COUNT_Y_REG:
 263        case DA9052_ALARM_MI_REG:
 264        case DA9052_ALARM_H_REG:
 265        case DA9052_ALARM_D_REG:
 266        case DA9052_ALARM_MO_REG:
 267        case DA9052_ALARM_Y_REG:
 268        case DA9052_PAGE1_CON_REG:
 269                return true;
 270        default:
 271                return false;
 272        }
 273}
 274
 275static bool da9052_reg_volatile(struct device *dev, unsigned int reg)
 276{
 277        switch (reg) {
 278        case DA9052_STATUS_A_REG:
 279        case DA9052_STATUS_B_REG:
 280        case DA9052_STATUS_C_REG:
 281        case DA9052_STATUS_D_REG:
 282        case DA9052_EVENT_A_REG:
 283        case DA9052_EVENT_B_REG:
 284        case DA9052_EVENT_C_REG:
 285        case DA9052_EVENT_D_REG:
 286        case DA9052_CONTROL_B_REG:
 287        case DA9052_CONTROL_D_REG:
 288        case DA9052_SUPPLY_REG:
 289        case DA9052_FAULTLOG_REG:
 290        case DA9052_CHG_TIME_REG:
 291        case DA9052_ADC_RES_L_REG:
 292        case DA9052_ADC_RES_H_REG:
 293        case DA9052_VDD_RES_REG:
 294        case DA9052_ICHG_AV_REG:
 295        case DA9052_TBAT_RES_REG:
 296        case DA9052_ADCIN4_RES_REG:
 297        case DA9052_ADCIN5_RES_REG:
 298        case DA9052_ADCIN6_RES_REG:
 299        case DA9052_TJUNC_RES_REG:
 300        case DA9052_TSI_X_MSB_REG:
 301        case DA9052_TSI_Y_MSB_REG:
 302        case DA9052_TSI_LSB_REG:
 303        case DA9052_TSI_Z_MSB_REG:
 304        case DA9052_COUNT_S_REG:
 305        case DA9052_COUNT_MI_REG:
 306        case DA9052_COUNT_H_REG:
 307        case DA9052_COUNT_D_REG:
 308        case DA9052_COUNT_MO_REG:
 309        case DA9052_COUNT_Y_REG:
 310        case DA9052_ALARM_MI_REG:
 311                return true;
 312        default:
 313                return false;
 314        }
 315}
 316
 317/*
 318 * TBAT look-up table is computed from the R90 reg (8 bit register)
 319 * reading as below. The battery temperature is in milliCentigrade
 320 * TBAT = (1/(t1+1/298) - 273) * 1000 mC
 321 * where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255))
 322 * Default values are R25 = 10e3, B = 3380, ITBAT = 50e-6
 323 * Example:
 324 * R25=10E3, B=3380, ITBAT=50e-6, ADCVAL=62d calculates
 325 * TBAT = 20015 mili degrees Centrigrade
 326 *
 327*/
 328static const int32_t tbat_lookup[255] = {
 329        183258, 144221, 124334, 111336, 101826, 94397, 88343, 83257,
 330        78889, 75071, 71688, 68656, 65914, 63414, 61120, 59001,
 331        570366, 55204, 53490, 51881, 50364, 48931, 47574, 46285,
 332        45059, 43889, 42772, 41703, 40678, 39694, 38748, 37838,
 333        36961, 36115, 35297, 34507, 33743, 33002, 32284, 31588,
 334        30911, 30254, 29615, 28994, 28389, 27799, 27225, 26664,
 335        26117, 25584, 25062, 24553, 24054, 23567, 23091, 22624,
 336        22167, 21719, 21281, 20851, 20429, 20015, 19610, 19211,
 337        18820, 18436, 18058, 17688, 17323, 16965, 16612, 16266,
 338        15925, 15589, 15259, 14933, 14613, 14298, 13987, 13681,
 339        13379, 13082, 12788, 12499, 12214, 11933, 11655, 11382,
 340        11112, 10845, 10582, 10322, 10066, 9812, 9562, 9315,
 341        9071, 8830, 8591, 8356, 8123, 7893, 7665, 7440,
 342        7218, 6998, 6780, 6565, 6352, 6141, 5933, 5726,
 343        5522, 5320, 5120, 4922, 4726, 4532, 4340, 4149,
 344        3961, 3774, 3589, 3406, 3225, 3045, 2867, 2690,
 345        2516, 2342, 2170, 2000, 1831, 1664, 1498, 1334,
 346        1171, 1009, 849, 690, 532, 376, 221, 67,
 347        -84, -236, -386, -535, -683, -830, -975, -1119,
 348        -1263, -1405, -1546, -1686, -1825, -1964, -2101, -2237,
 349        -2372, -2506, -2639, -2771, -2902, -3033, -3162, -3291,
 350        -3418, -3545, -3671, -3796, -3920, -4044, -4166, -4288,
 351        -4409, -4529, -4649, -4767, -4885, -5002, -5119, -5235,
 352        -5349, -5464, -5577, -5690, -5802, -5913, -6024, -6134,
 353        -6244, -6352, -6461, -6568, -6675, -6781, -6887, -6992,
 354        -7096, -7200, -7303, -7406, -7508, -7609, -7710, -7810,
 355        -7910, -8009, -8108, -8206, -8304, -8401, -8497, -8593,
 356        -8689, -8784, -8878, -8972, -9066, -9159, -9251, -9343,
 357        -9435, -9526, -9617, -9707, -9796, -9886, -9975, -10063,
 358        -10151, -10238, -10325, -10412, -10839, -10923, -11007, -11090,
 359        -11173, -11256, -11338, -11420, -11501, -11583, -11663, -11744,
 360        -11823, -11903, -11982
 361};
 362
 363static const u8 chan_mux[DA9052_ADC_VBBAT + 1] = {
 364        [DA9052_ADC_VDDOUT]     = DA9052_ADC_MAN_MUXSEL_VDDOUT,
 365        [DA9052_ADC_ICH]        = DA9052_ADC_MAN_MUXSEL_ICH,
 366        [DA9052_ADC_TBAT]       = DA9052_ADC_MAN_MUXSEL_TBAT,
 367        [DA9052_ADC_VBAT]       = DA9052_ADC_MAN_MUXSEL_VBAT,
 368        [DA9052_ADC_IN4]        = DA9052_ADC_MAN_MUXSEL_AD4,
 369        [DA9052_ADC_IN5]        = DA9052_ADC_MAN_MUXSEL_AD5,
 370        [DA9052_ADC_IN6]        = DA9052_ADC_MAN_MUXSEL_AD6,
 371        [DA9052_ADC_VBBAT]      = DA9052_ADC_MAN_MUXSEL_VBBAT
 372};
 373
 374int da9052_adc_manual_read(struct da9052 *da9052, unsigned char channel)
 375{
 376        int ret;
 377        unsigned short calc_data;
 378        unsigned short data;
 379        unsigned char mux_sel;
 380
 381        if (channel > DA9052_ADC_VBBAT)
 382                return -EINVAL;
 383
 384        mutex_lock(&da9052->auxadc_lock);
 385
 386        reinit_completion(&da9052->done);
 387
 388        /* Channel gets activated on enabling the Conversion bit */
 389        mux_sel = chan_mux[channel] | DA9052_ADC_MAN_MAN_CONV;
 390
 391        ret = da9052_reg_write(da9052, DA9052_ADC_MAN_REG, mux_sel);
 392        if (ret < 0)
 393                goto err;
 394
 395        /* Wait for an interrupt */
 396        if (!wait_for_completion_timeout(&da9052->done,
 397                                         msecs_to_jiffies(500))) {
 398                dev_err(da9052->dev,
 399                        "timeout waiting for ADC conversion interrupt\n");
 400                ret = -ETIMEDOUT;
 401                goto err;
 402        }
 403
 404        ret = da9052_reg_read(da9052, DA9052_ADC_RES_H_REG);
 405        if (ret < 0)
 406                goto err;
 407
 408        calc_data = (unsigned short)ret;
 409        data = calc_data << 2;
 410
 411        ret = da9052_reg_read(da9052, DA9052_ADC_RES_L_REG);
 412        if (ret < 0)
 413                goto err;
 414
 415        calc_data = (unsigned short)(ret & DA9052_ADC_RES_LSB);
 416        data |= calc_data;
 417
 418        ret = data;
 419
 420err:
 421        mutex_unlock(&da9052->auxadc_lock);
 422        return ret;
 423}
 424EXPORT_SYMBOL_GPL(da9052_adc_manual_read);
 425
 426int da9052_adc_read_temp(struct da9052 *da9052)
 427{
 428        int tbat;
 429
 430        tbat = da9052_reg_read(da9052, DA9052_TBAT_RES_REG);
 431        if (tbat <= 0)
 432                return tbat;
 433
 434        /* ARRAY_SIZE check is not needed since TBAT is a 8-bit register */
 435        return tbat_lookup[tbat - 1];
 436}
 437EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 438
 439static const struct mfd_cell da9052_subdev_info[] = {
 440        {
 441                .name = "da9052-regulator",
 442                .id = 0,
 443        },
 444        {
 445                .name = "da9052-regulator",
 446                .id = 1,
 447        },
 448        {
 449                .name = "da9052-regulator",
 450                .id = 2,
 451        },
 452        {
 453                .name = "da9052-regulator",
 454                .id = 3,
 455        },
 456        {
 457                .name = "da9052-regulator",
 458                .id = 4,
 459        },
 460        {
 461                .name = "da9052-regulator",
 462                .id = 5,
 463        },
 464        {
 465                .name = "da9052-regulator",
 466                .id = 6,
 467        },
 468        {
 469                .name = "da9052-regulator",
 470                .id = 7,
 471        },
 472        {
 473                .name = "da9052-regulator",
 474                .id = 8,
 475        },
 476        {
 477                .name = "da9052-regulator",
 478                .id = 9,
 479        },
 480        {
 481                .name = "da9052-regulator",
 482                .id = 10,
 483        },
 484        {
 485                .name = "da9052-regulator",
 486                .id = 11,
 487        },
 488        {
 489                .name = "da9052-regulator",
 490                .id = 12,
 491        },
 492        {
 493                .name = "da9052-regulator",
 494                .id = 13,
 495        },
 496        {
 497                .name = "da9052-onkey",
 498        },
 499        {
 500                .name = "da9052-rtc",
 501        },
 502        {
 503                .name = "da9052-gpio",
 504        },
 505        {
 506                .name = "da9052-hwmon",
 507        },
 508        {
 509                .name = "da9052-leds",
 510        },
 511        {
 512                .name = "da9052-wled1",
 513        },
 514        {
 515                .name = "da9052-wled2",
 516        },
 517        {
 518                .name = "da9052-wled3",
 519        },
 520        {
 521                .name = "da9052-bat",
 522        },
 523        {
 524                .name = "da9052-watchdog",
 525        },
 526};
 527
 528static const struct mfd_cell da9052_tsi_subdev_info[] = {
 529        { .name = "da9052-tsi" },
 530};
 531
 532const 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};
 543EXPORT_SYMBOL_GPL(da9052_regmap_config);
 544
 545static 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
 591int 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        /*
 623         * Check if touchscreen pins are used are analogue input instead
 624         * of having a touchscreen connected to them. The analogue input
 625         * functionality will be provided by hwmon driver (if enabled).
 626         */
 627        if (!device_property_read_bool(da9052->dev, "dlg,tsi-as-adc")) {
 628                ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
 629                                      da9052_tsi_subdev_info,
 630                                      ARRAY_SIZE(da9052_tsi_subdev_info),
 631                                      NULL, 0, NULL);
 632                if (ret) {
 633                        dev_err(da9052->dev, "failed to add TSI subdev: %d\n",
 634                                ret);
 635                        goto err;
 636                }
 637        }
 638
 639        return 0;
 640
 641err:
 642        mfd_remove_devices(da9052->dev);
 643        da9052_irq_exit(da9052);
 644
 645        return ret;
 646}
 647
 648void da9052_device_exit(struct da9052 *da9052)
 649{
 650        mfd_remove_devices(da9052->dev);
 651        da9052_irq_exit(da9052);
 652}
 653
 654MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 655MODULE_DESCRIPTION("DA9052 MFD Core");
 656MODULE_LICENSE("GPL");
 657