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_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
 159 static 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_IRQ_MASK_A_REG:
 168         case DA9052_IRQ_MASK_B_REG:
 169         case DA9052_IRQ_MASK_C_REG:
 170         case DA9052_IRQ_MASK_D_REG:
 171         case DA9052_CONTROL_A_REG:
 172         case DA9052_CONTROL_B_REG:
 173         case DA9052_CONTROL_C_REG:
 174         case DA9052_CONTROL_D_REG:
 175         case DA9052_PDDIS_REG:
 176         case DA9052_RESET_REG:
 177         case DA9052_GPIO_0_1_REG:
 178         case DA9052_GPIO_2_3_REG:
 179         case DA9052_GPIO_4_5_REG:
 180         case DA9052_GPIO_6_7_REG:
 181         case DA9052_GPIO_14_15_REG:
 182         case DA9052_ID_0_1_REG:
 183         case DA9052_ID_2_3_REG:
 184         case DA9052_ID_4_5_REG:
 185         case DA9052_ID_6_7_REG:
 186         case DA9052_ID_8_9_REG:
 187         case DA9052_ID_10_11_REG:
 188         case DA9052_ID_12_13_REG:
 189         case DA9052_ID_14_15_REG:
 190         case DA9052_ID_16_17_REG:
 191         case DA9052_ID_18_19_REG:
 192         case DA9052_ID_20_21_REG:
 193         case DA9052_SEQ_STATUS_REG:
 194         case DA9052_SEQ_A_REG:
 195         case DA9052_SEQ_B_REG:
 196         case DA9052_SEQ_TIMER_REG:
 197         case DA9052_BUCKA_REG:
 198         case DA9052_BUCKB_REG:
 199         case DA9052_BUCKCORE_REG:
 200         case DA9052_BUCKPRO_REG:
 201         case DA9052_BUCKMEM_REG:
 202         case DA9052_BUCKPERI_REG:
 203         case DA9052_LDO1_REG:
 204         case DA9052_LDO2_REG:
 205         case DA9052_LDO3_REG:
 206         case DA9052_LDO4_REG:
 207         case DA9052_LDO5_REG:
 208         case DA9052_LDO6_REG:
 209         case DA9052_LDO7_REG:
 210         case DA9052_LDO8_REG:
 211         case DA9052_LDO9_REG:
 212         case DA9052_LDO10_REG:
 213         case DA9052_SUPPLY_REG:
 214         case DA9052_PULLDOWN_REG:
 215         case DA9052_CHGBUCK_REG:
 216         case DA9052_WAITCONT_REG:
 217         case DA9052_ISET_REG:
 218         case DA9052_BATCHG_REG:
 219         case DA9052_CHG_CONT_REG:
 220         case DA9052_INPUT_CONT_REG:
 221         case DA9052_BBAT_CONT_REG:
 222         case DA9052_BOOST_REG:
 223         case DA9052_LED_CONT_REG:
 224         case DA9052_LEDMIN123_REG:
 225         case DA9052_LED1_CONF_REG:
 226         case DA9052_LED2_CONF_REG:
 227         case DA9052_LED3_CONF_REG:
 228         case DA9052_LED1CONT_REG:
 229         case DA9052_LED2CONT_REG:
 230         case DA9052_LED3CONT_REG:
 231         case DA9052_LED_CONT_4_REG:
 232         case DA9052_LED_CONT_5_REG:
 233         case DA9052_ADC_MAN_REG:
 234         case DA9052_ADC_CONT_REG:
 235         case DA9052_ADC_RES_L_REG:
 236         case DA9052_ADC_RES_H_REG:
 237         case DA9052_VDD_RES_REG:
 238         case DA9052_VDD_MON_REG:
 239         case DA9052_ICHG_THD_REG:
 240         case DA9052_ICHG_END_REG:
 241         case DA9052_TBAT_HIGHP_REG:
 242         case DA9052_TBAT_HIGHN_REG:
 243         case DA9052_TBAT_LOW_REG:
 244         case DA9052_T_OFFSET_REG:
 245         case DA9052_AUTO4_HIGH_REG:
 246         case DA9052_AUTO4_LOW_REG:
 247         case DA9052_AUTO5_HIGH_REG:
 248         case DA9052_AUTO5_LOW_REG:
 249         case DA9052_AUTO6_HIGH_REG:
 250         case DA9052_AUTO6_LOW_REG:
 251         case DA9052_TSI_CONT_A_REG:
 252         case DA9052_TSI_CONT_B_REG:
 253         case DA9052_COUNT_S_REG:
 254         case DA9052_COUNT_MI_REG:
 255         case DA9052_COUNT_H_REG:
 256         case DA9052_COUNT_D_REG:
 257         case DA9052_COUNT_MO_REG:
 258         case DA9052_COUNT_Y_REG:
 259         case DA9052_ALARM_MI_REG:
 260         case DA9052_ALARM_H_REG:
 261         case DA9052_ALARM_D_REG:
 262         case DA9052_ALARM_MO_REG:
 263         case DA9052_ALARM_Y_REG:
 264         case DA9052_PAGE1_CON_REG:
 265                 return true;
 266         default:
 267                 return false;
 268         }
 269 }
 270
 271 static bool da9052_reg_volatile(struct device *dev, unsigned int reg)
 272 {
 273         switch (reg) {
 274         case DA9052_STATUS_A_REG:
 275         case DA9052_STATUS_B_REG:
 276         case DA9052_STATUS_C_REG:
 277         case DA9052_STATUS_D_REG:
 278         case DA9052_EVENT_A_REG:
 279         case DA9052_EVENT_B_REG:
 280         case DA9052_EVENT_C_REG:
 281         case DA9052_EVENT_D_REG:
 282         case DA9052_CONTROL_B_REG:
 283         case DA9052_CONTROL_D_REG:
 284         case DA9052_SUPPLY_REG:
 285         case DA9052_FAULTLOG_REG:
 286         case DA9052_CHG_TIME_REG:
 287         case DA9052_ADC_RES_L_REG:
 288         case DA9052_ADC_RES_H_REG:
 289         case DA9052_VDD_RES_REG:
 290         case DA9052_ICHG_AV_REG:
 291         case DA9052_TBAT_RES_REG:
 292         case DA9052_ADCIN4_RES_REG:
 293         case DA9052_ADCIN5_RES_REG:
 294         case DA9052_ADCIN6_RES_REG:
 295         case DA9052_TJUNC_RES_REG:
 296         case DA9052_TSI_X_MSB_REG:
 297         case DA9052_TSI_Y_MSB_REG:
 298         case DA9052_TSI_LSB_REG:
 299         case DA9052_TSI_Z_MSB_REG:
 300         case DA9052_COUNT_S_REG:
 301         case DA9052_COUNT_MI_REG:
 302         case DA9052_COUNT_H_REG:
 303         case DA9052_COUNT_D_REG:
 304         case DA9052_COUNT_MO_REG:
 305         case DA9052_COUNT_Y_REG:
 306         case DA9052_ALARM_MI_REG:
 307                 return true;
 308         default:
 309                 return false;
 310         }
 311 }
 312
 313 /*
 314  * TBAT look-up table is computed from the R90 reg (8 bit register)
 315  * reading as below. The battery temperature is in milliCentigrade
 316  * TBAT = (1/(t1+1/298) - 273) * 1000 mC
 317  * where t1 = (1/B)* ln(( ADCval * 2.5)/(R25*ITBAT*255))
 318  * Default values are R25 = 10e3, B = 3380, ITBAT = 50e-6
 319  * Example:
 320  * R25=10E3, B=3380, ITBAT=50e-6, ADCVAL=62d calculates
 321  * TBAT = 20015 mili degrees Centrigrade
 322  *
 323 */
 324 static const int32_t tbat_lookup[255] = {
 325         183258, 144221, 124334, 111336, 101826, 94397, 88343, 83257,
 326         78889, 75071, 71688, 68656, 65914, 63414, 61120, 59001,
 327         570366, 55204, 53490, 51881, 50364, 48931, 47574, 46285,
 328         45059, 43889, 42772, 41703, 40678, 39694, 38748, 37838,
 329         36961, 36115, 35297, 34507, 33743, 33002, 32284, 31588,
 330         30911, 30254, 29615, 28994, 28389, 27799, 27225, 26664,
 331         26117, 25584, 25062, 24553, 24054, 23567, 23091, 22624,
 332         22167, 21719, 21281, 20851, 20429, 20015, 19610, 19211,
 333         18820, 18436, 18058, 17688, 17323, 16965, 16612, 16266,
 334         15925, 15589, 15259, 14933, 14613, 14298, 13987, 13681,
 335         13379, 13082, 12788, 12499, 12214, 11933, 11655, 11382,
 336         11112, 10845, 10582, 10322, 10066, 9812, 9562, 9315,
 337         9071, 8830, 8591, 8356, 8123, 7893, 7665, 7440,
 338         7218, 6998, 6780, 6565, 6352, 6141, 5933, 5726,
 339         5522, 5320, 5120, 4922, 4726, 4532, 4340, 4149,
 340         3961, 3774, 3589, 3406, 3225, 3045, 2867, 2690,
 341         2516, 2342, 2170, 2000, 1831, 1664, 1498, 1334,
 342         1171, 1009, 849, 690, 532, 376, 221, 67,
 343         -84, -236, -386, -535, -683, -830, -975, -1119,
 344         -1263, -1405, -1546, -1686, -1825, -1964, -2101, -2237,
 345         -2372, -2506, -2639, -2771, -2902, -3033, -3162, -3291,
 346         -3418, -3545, -3671, -3796, -3920, -4044, -4166, -4288,
 347         -4409, -4529, -4649, -4767, -4885, -5002, -5119, -5235,
 348         -5349, -5464, -5577, -5690, -5802, -5913, -6024, -6134,
 349         -6244, -6352, -6461, -6568, -6675, -6781, -6887, -6992,
 350         -7096, -7200, -7303, -7406, -7508, -7609, -7710, -7810,
 351         -7910, -8009, -8108, -8206, -8304, -8401, -8497, -8593,
 352         -8689, -8784, -8878, -8972, -9066, -9159, -9251, -9343,
 353         -9435, -9526, -9617, -9707, -9796, -9886, -9975, -10063,
 354         -10151, -10238, -10325, -10412, -10839, -10923, -11007, -11090,
 355         -11173, -11256, -11338, -11420, -11501, -11583, -11663, -11744,
 356         -11823, -11903, -11982
 357 };
 358
 359 static const u8 chan_mux[DA9052_ADC_VBBAT + 1] = {
 360         [DA9052_ADC_VDDOUT]     = DA9052_ADC_MAN_MUXSEL_VDDOUT,
 361         [DA9052_ADC_ICH]        = DA9052_ADC_MAN_MUXSEL_ICH,
 362         [DA9052_ADC_TBAT]       = DA9052_ADC_MAN_MUXSEL_TBAT,
 363         [DA9052_ADC_VBAT]       = DA9052_ADC_MAN_MUXSEL_VBAT,
 364         [DA9052_ADC_IN4]        = DA9052_ADC_MAN_MUXSEL_AD4,
 365         [DA9052_ADC_IN5]        = DA9052_ADC_MAN_MUXSEL_AD5,
 366         [DA9052_ADC_IN6]        = DA9052_ADC_MAN_MUXSEL_AD6,
 367         [DA9052_ADC_VBBAT]      = DA9052_ADC_MAN_MUXSEL_VBBAT
 368 };
 369
 370 int da9052_adc_manual_read(struct da9052 *da9052, unsigned char channel)
 371 {
 372         int ret;
 373         unsigned short calc_data;
 374         unsigned short data;
 375         unsigned char mux_sel;
 376
 377         if (channel > DA9052_ADC_VBBAT)
 378                 return -EINVAL;
 379
 380         mutex_lock(&da9052->auxadc_lock);
 381
 382         /* Channel gets activated on enabling the Conversion bit */
 383         mux_sel = chan_mux[channel] | DA9052_ADC_MAN_MAN_CONV;
 384
 385         ret = da9052_reg_write(da9052, DA9052_ADC_MAN_REG, mux_sel);
 386         if (ret < 0)
 387                 goto err;
 388
 389         /* Wait for an interrupt */
 390         if (!wait_for_completion_timeout(&da9052->done,
 391                                          msecs_to_jiffies(500))) {
 392                 dev_err(da9052->dev,
 393                         "timeout waiting for ADC conversion interrupt\n");
 394                 ret = -ETIMEDOUT;
 395                 goto err;
 396         }
 397
 398         ret = da9052_reg_read(da9052, DA9052_ADC_RES_H_REG);
 399         if (ret < 0)
 400                 goto err;
 401
 402         calc_data = (unsigned short)ret;
 403         data = calc_data << 2;
 404
 405         ret = da9052_reg_read(da9052, DA9052_ADC_RES_L_REG);
 406         if (ret < 0)
 407                 goto err;
 408
 409         calc_data = (unsigned short)(ret & DA9052_ADC_RES_LSB);
 410         data |= calc_data;
 411
 412         ret = data;
 413
 414 err:
 415         mutex_unlock(&da9052->auxadc_lock);
 416         return ret;
 417 }
 418 EXPORT_SYMBOL_GPL(da9052_adc_manual_read);
 419
 420 int da9052_adc_read_temp(struct da9052 *da9052)
 421 {
 422         int tbat;
 423
 424         tbat = da9052_reg_read(da9052, DA9052_TBAT_RES_REG);
 425         if (tbat <= 0)
 426                 return tbat;
 427
 428         /* ARRAY_SIZE check is not needed since TBAT is a 8-bit register */
 429         return tbat_lookup[tbat - 1];
 430 }
 431 EXPORT_SYMBOL_GPL(da9052_adc_read_temp);
 432
 433 static const struct mfd_cell da9052_subdev_info[] = {
 434         {
 435                 .name = "da9052-regulator",
 436                 .id = 0,
 437         },
 438         {
 439                 .name = "da9052-regulator",
 440                 .id = 1,
 441         },
 442         {
 443                 .name = "da9052-regulator",
 444                 .id = 2,
 445         },
 446         {
 447                 .name = "da9052-regulator",
 448                 .id = 3,
 449         },
 450         {
 451                 .name = "da9052-regulator",
 452                 .id = 4,
 453         },
 454         {
 455                 .name = "da9052-regulator",
 456                 .id = 5,
 457         },
 458         {
 459                 .name = "da9052-regulator",
 460                 .id = 6,
 461         },
 462         {
 463                 .name = "da9052-regulator",
 464                 .id = 7,
 465         },
 466         {
 467                 .name = "da9052-regulator",
 468                 .id = 8,
 469         },
 470         {
 471                 .name = "da9052-regulator",
 472                 .id = 9,
 473         },
 474         {
 475                 .name = "da9052-regulator",
 476                 .id = 10,
 477         },
 478         {
 479                 .name = "da9052-regulator",
 480                 .id = 11,
 481         },
 482         {
 483                 .name = "da9052-regulator",
 484                 .id = 12,
 485         },
 486         {
 487                 .name = "da9052-regulator",
 488                 .id = 13,
 489         },
 490         {
 491                 .name = "da9052-onkey",
 492         },
 493         {
 494                 .name = "da9052-rtc",
 495         },
 496         {
 497                 .name = "da9052-gpio",
 498         },
 499         {
 500                 .name = "da9052-hwmon",
 501         },
 502         {
 503                 .name = "da9052-leds",
 504         },
 505         {
 506                 .name = "da9052-wled1",
 507         },
 508         {
 509                 .name = "da9052-wled2",
 510         },
 511         {
 512                 .name = "da9052-wled3",
 513         },
 514         {
 515                 .name = "da9052-tsi",
 516         },
 517         {
 518                 .name = "da9052-bat",
 519         },
 520         {
 521                 .name = "da9052-watchdog",
 522         },
 523 };
 524
 525 const struct regmap_config da9052_regmap_config = {
 526         .reg_bits = 8,
 527         .val_bits = 8,
 528
 529         .cache_type = REGCACHE_RBTREE,
 530
 531         .max_register = DA9052_PAGE1_CON_REG,
 532         .readable_reg = da9052_reg_readable,
 533         .writeable_reg = da9052_reg_writeable,
 534         .volatile_reg = da9052_reg_volatile,
 535 };
 536 EXPORT_SYMBOL_GPL(da9052_regmap_config);
 537
 538 int da9052_device_init(struct da9052 *da9052, u8 chip_id)
 539 {
 540         struct da9052_pdata *pdata = dev_get_platdata(da9052->dev);
 541         int ret;
 542
 543         mutex_init(&da9052->auxadc_lock);
 544         init_completion(&da9052->done);
 545
 546         if (pdata && pdata->init != NULL)
 547                 pdata->init(da9052);
 548
 549         da9052->chip_id = chip_id;
 550
 551         ret = da9052_irq_init(da9052);
 552         if (ret != 0) {
 553                 dev_err(da9052->dev, "da9052_irq_init failed: %d\n", ret);
 554                 return ret;
 555         }
 556
 557         ret = mfd_add_devices(da9052->dev, PLATFORM_DEVID_AUTO,
 558                               da9052_subdev_info,
 559                               ARRAY_SIZE(da9052_subdev_info), NULL, 0, NULL);
 560         if (ret) {
 561                 dev_err(da9052->dev, "mfd_add_devices failed: %d\n", ret);
 562                 goto err;
 563         }
 564
 565         return 0;
 566
 567 err:
 568         da9052_irq_exit(da9052);
 569
 570         return ret;
 571 }
 572
 573 void da9052_device_exit(struct da9052 *da9052)
 574 {
 575         mfd_remove_devices(da9052->dev);
 576         da9052_irq_exit(da9052);
 577 }
 578
 579 MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
 580 MODULE_DESCRIPTION("DA9052 MFD Core");
 581 MODULE_LICENSE("GPL");