drivers/mfd/max8925-core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Base driver for Maxim MAX8925
   4  *
   5  * Copyright (C) 2009-2010 Marvell International Ltd.
   6  *      Haojian Zhuang <haojian.zhuang@marvell.com>
   7  */
   8
   9 #include <linux/kernel.h>
  10 #include <linux/init.h>
  11 #include <linux/i2c.h>
  12 #include <linux/irq.h>
  13 #include <linux/interrupt.h>
  14 #include <linux/irqdomain.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/regulator/machine.h>
  17 #include <linux/mfd/core.h>
  18 #include <linux/mfd/max8925.h>
  19 #include <linux/of.h>
  20 #include <linux/of_platform.h>
  21
  22 static struct resource bk_resources[] = {
  23         { 0x84, 0x84, "mode control", IORESOURCE_REG, },
  24         { 0x85, 0x85, "control",      IORESOURCE_REG, },
  25 };
  26
  27 static struct mfd_cell bk_devs[] = {
  28         {
  29                 .name           = "max8925-backlight",
  30                 .num_resources  = ARRAY_SIZE(bk_resources),
  31                 .resources      = &bk_resources[0],
  32                 .id             = -1,
  33         },
  34 };
  35
  36 static struct resource touch_resources[] = {
  37         {
  38                 .name   = "max8925-tsc",
  39                 .start  = MAX8925_TSC_IRQ,
  40                 .end    = MAX8925_ADC_RES_END,
  41                 .flags  = IORESOURCE_REG,
  42         },
  43 };
  44
  45 static const struct mfd_cell touch_devs[] = {
  46         {
  47                 .name           = "max8925-touch",
  48                 .num_resources  = 1,
  49                 .resources      = &touch_resources[0],
  50                 .id             = -1,
  51         },
  52 };
  53
  54 static struct resource power_supply_resources[] = {
  55         {
  56                 .name   = "max8925-power",
  57                 .start  = MAX8925_CHG_IRQ1,
  58                 .end    = MAX8925_CHG_IRQ1_MASK,
  59                 .flags  = IORESOURCE_REG,
  60         },
  61 };
  62
  63 static const struct mfd_cell power_devs[] = {
  64         {
  65                 .name           = "max8925-power",
  66                 .num_resources  = 1,
  67                 .resources      = &power_supply_resources[0],
  68                 .id             = -1,
  69         },
  70 };
  71
  72 static struct resource rtc_resources[] = {
  73         {
  74                 .name   = "max8925-rtc",
  75                 .start  = MAX8925_IRQ_RTC_ALARM0,
  76                 .end    = MAX8925_IRQ_RTC_ALARM0,
  77                 .flags  = IORESOURCE_IRQ,
  78         },
  79 };
  80
  81 static const struct mfd_cell rtc_devs[] = {
  82         {
  83                 .name           = "max8925-rtc",
  84                 .num_resources  = 1,
  85                 .resources      = &rtc_resources[0],
  86                 .id             = -1,
  87         },
  88 };
  89
  90 static struct resource onkey_resources[] = {
  91         {
  92                 .name   = "max8925-onkey",
  93                 .start  = MAX8925_IRQ_GPM_SW_R,
  94                 .end    = MAX8925_IRQ_GPM_SW_R,
  95                 .flags  = IORESOURCE_IRQ,
  96         }, {
  97                 .name   = "max8925-onkey",
  98                 .start  = MAX8925_IRQ_GPM_SW_F,
  99                 .end    = MAX8925_IRQ_GPM_SW_F,
 100                 .flags  = IORESOURCE_IRQ,
 101         },
 102 };
 103
 104 static const struct mfd_cell onkey_devs[] = {
 105         {
 106                 .name           = "max8925-onkey",
 107                 .num_resources  = 2,
 108                 .resources      = &onkey_resources[0],
 109                 .id             = -1,
 110         },
 111 };
 112
 113 static struct resource sd1_resources[] = {
 114         {0x06, 0x06, "sdv", IORESOURCE_REG, },
 115 };
 116
 117 static struct resource sd2_resources[] = {
 118         {0x09, 0x09, "sdv", IORESOURCE_REG, },
 119 };
 120
 121 static struct resource sd3_resources[] = {
 122         {0x0c, 0x0c, "sdv", IORESOURCE_REG, },
 123 };
 124
 125 static struct resource ldo1_resources[] = {
 126         {0x1a, 0x1a, "ldov", IORESOURCE_REG, },
 127 };
 128
 129 static struct resource ldo2_resources[] = {
 130         {0x1e, 0x1e, "ldov", IORESOURCE_REG, },
 131 };
 132
 133 static struct resource ldo3_resources[] = {
 134         {0x22, 0x22, "ldov", IORESOURCE_REG, },
 135 };
 136
 137 static struct resource ldo4_resources[] = {
 138         {0x26, 0x26, "ldov", IORESOURCE_REG, },
 139 };
 140
 141 static struct resource ldo5_resources[] = {
 142         {0x2a, 0x2a, "ldov", IORESOURCE_REG, },
 143 };
 144
 145 static struct resource ldo6_resources[] = {
 146         {0x2e, 0x2e, "ldov", IORESOURCE_REG, },
 147 };
 148
 149 static struct resource ldo7_resources[] = {
 150         {0x32, 0x32, "ldov", IORESOURCE_REG, },
 151 };
 152
 153 static struct resource ldo8_resources[] = {
 154         {0x36, 0x36, "ldov", IORESOURCE_REG, },
 155 };
 156
 157 static struct resource ldo9_resources[] = {
 158         {0x3a, 0x3a, "ldov", IORESOURCE_REG, },
 159 };
 160
 161 static struct resource ldo10_resources[] = {
 162         {0x3e, 0x3e, "ldov", IORESOURCE_REG, },
 163 };
 164
 165 static struct resource ldo11_resources[] = {
 166         {0x42, 0x42, "ldov", IORESOURCE_REG, },
 167 };
 168
 169 static struct resource ldo12_resources[] = {
 170         {0x46, 0x46, "ldov", IORESOURCE_REG, },
 171 };
 172
 173 static struct resource ldo13_resources[] = {
 174         {0x4a, 0x4a, "ldov", IORESOURCE_REG, },
 175 };
 176
 177 static struct resource ldo14_resources[] = {
 178         {0x4e, 0x4e, "ldov", IORESOURCE_REG, },
 179 };
 180
 181 static struct resource ldo15_resources[] = {
 182         {0x52, 0x52, "ldov", IORESOURCE_REG, },
 183 };
 184
 185 static struct resource ldo16_resources[] = {
 186         {0x12, 0x12, "ldov", IORESOURCE_REG, },
 187 };
 188
 189 static struct resource ldo17_resources[] = {
 190         {0x16, 0x16, "ldov", IORESOURCE_REG, },
 191 };
 192
 193 static struct resource ldo18_resources[] = {
 194         {0x74, 0x74, "ldov", IORESOURCE_REG, },
 195 };
 196
 197 static struct resource ldo19_resources[] = {
 198         {0x5e, 0x5e, "ldov", IORESOURCE_REG, },
 199 };
 200
 201 static struct resource ldo20_resources[] = {
 202         {0x9e, 0x9e, "ldov", IORESOURCE_REG, },
 203 };
 204
 205 static struct mfd_cell reg_devs[] = {
 206         {
 207                 .name = "max8925-regulator",
 208                 .id = 0,
 209                 .num_resources = ARRAY_SIZE(sd1_resources),
 210                 .resources = sd1_resources,
 211         }, {
 212                 .name = "max8925-regulator",
 213                 .id = 1,
 214                 .num_resources = ARRAY_SIZE(sd2_resources),
 215                 .resources = sd2_resources,
 216         }, {
 217                 .name = "max8925-regulator",
 218                 .id = 2,
 219                 .num_resources = ARRAY_SIZE(sd3_resources),
 220                 .resources = sd3_resources,
 221         }, {
 222                 .name = "max8925-regulator",
 223                 .id = 3,
 224                 .num_resources = ARRAY_SIZE(ldo1_resources),
 225                 .resources = ldo1_resources,
 226         }, {
 227                 .name = "max8925-regulator",
 228                 .id = 4,
 229                 .num_resources = ARRAY_SIZE(ldo2_resources),
 230                 .resources = ldo2_resources,
 231         }, {
 232                 .name = "max8925-regulator",
 233                 .id = 5,
 234                 .num_resources = ARRAY_SIZE(ldo3_resources),
 235                 .resources = ldo3_resources,
 236         }, {
 237                 .name = "max8925-regulator",
 238                 .id = 6,
 239                 .num_resources = ARRAY_SIZE(ldo4_resources),
 240                 .resources = ldo4_resources,
 241         }, {
 242                 .name = "max8925-regulator",
 243                 .id = 7,
 244                 .num_resources = ARRAY_SIZE(ldo5_resources),
 245                 .resources = ldo5_resources,
 246         }, {
 247                 .name = "max8925-regulator",
 248                 .id = 8,
 249                 .num_resources = ARRAY_SIZE(ldo6_resources),
 250                 .resources = ldo6_resources,
 251         }, {
 252                 .name = "max8925-regulator",
 253                 .id = 9,
 254                 .num_resources = ARRAY_SIZE(ldo7_resources),
 255                 .resources = ldo7_resources,
 256         }, {
 257                 .name = "max8925-regulator",
 258                 .id = 10,
 259                 .num_resources = ARRAY_SIZE(ldo8_resources),
 260                 .resources = ldo8_resources,
 261         }, {
 262                 .name = "max8925-regulator",
 263                 .id = 11,
 264                 .num_resources = ARRAY_SIZE(ldo9_resources),
 265                 .resources = ldo9_resources,
 266         }, {
 267                 .name = "max8925-regulator",
 268                 .id = 12,
 269                 .num_resources = ARRAY_SIZE(ldo10_resources),
 270                 .resources = ldo10_resources,
 271         }, {
 272                 .name = "max8925-regulator",
 273                 .id = 13,
 274                 .num_resources = ARRAY_SIZE(ldo11_resources),
 275                 .resources = ldo11_resources,
 276         }, {
 277                 .name = "max8925-regulator",
 278                 .id = 14,
 279                 .num_resources = ARRAY_SIZE(ldo12_resources),
 280                 .resources = ldo12_resources,
 281         }, {
 282                 .name = "max8925-regulator",
 283                 .id = 15,
 284                 .num_resources = ARRAY_SIZE(ldo13_resources),
 285                 .resources = ldo13_resources,
 286         }, {
 287                 .name = "max8925-regulator",
 288                 .id = 16,
 289                 .num_resources = ARRAY_SIZE(ldo14_resources),
 290                 .resources = ldo14_resources,
 291         }, {
 292                 .name = "max8925-regulator",
 293                 .id = 17,
 294                 .num_resources = ARRAY_SIZE(ldo15_resources),
 295                 .resources = ldo15_resources,
 296         }, {
 297                 .name = "max8925-regulator",
 298                 .id = 18,
 299                 .num_resources = ARRAY_SIZE(ldo16_resources),
 300                 .resources = ldo16_resources,
 301         }, {
 302                 .name = "max8925-regulator",
 303                 .id = 19,
 304                 .num_resources = ARRAY_SIZE(ldo17_resources),
 305                 .resources = ldo17_resources,
 306         }, {
 307                 .name = "max8925-regulator",
 308                 .id = 20,
 309                 .num_resources = ARRAY_SIZE(ldo18_resources),
 310                 .resources = ldo18_resources,
 311         }, {
 312                 .name = "max8925-regulator",
 313                 .id = 21,
 314                 .num_resources = ARRAY_SIZE(ldo19_resources),
 315                 .resources = ldo19_resources,
 316         }, {
 317                 .name = "max8925-regulator",
 318                 .id = 22,
 319                 .num_resources = ARRAY_SIZE(ldo20_resources),
 320                 .resources = ldo20_resources,
 321         },
 322 };
 323
 324 enum {
 325         FLAGS_ADC = 1,  /* register in ADC component */
 326         FLAGS_RTC,      /* register in RTC component */
 327 };
 328
 329 struct max8925_irq_data {
 330         int     reg;
 331         int     mask_reg;
 332         int     enable;         /* enable or not */
 333         int     offs;           /* bit offset in mask register */
 334         int     flags;
 335         int     tsc_irq;
 336 };
 337
 338 static struct max8925_irq_data max8925_irqs[] = {
 339         [MAX8925_IRQ_VCHG_DC_OVP] = {
 340                 .reg            = MAX8925_CHG_IRQ1,
 341                 .mask_reg       = MAX8925_CHG_IRQ1_MASK,
 342                 .offs           = 1 << 0,
 343         },
 344         [MAX8925_IRQ_VCHG_DC_F] = {
 345                 .reg            = MAX8925_CHG_IRQ1,
 346                 .mask_reg       = MAX8925_CHG_IRQ1_MASK,
 347                 .offs           = 1 << 1,
 348         },
 349         [MAX8925_IRQ_VCHG_DC_R] = {
 350                 .reg            = MAX8925_CHG_IRQ1,
 351                 .mask_reg       = MAX8925_CHG_IRQ1_MASK,
 352                 .offs           = 1 << 2,
 353         },
 354         [MAX8925_IRQ_VCHG_THM_OK_R] = {
 355                 .reg            = MAX8925_CHG_IRQ2,
 356                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 357                 .offs           = 1 << 0,
 358         },
 359         [MAX8925_IRQ_VCHG_THM_OK_F] = {
 360                 .reg            = MAX8925_CHG_IRQ2,
 361                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 362                 .offs           = 1 << 1,
 363         },
 364         [MAX8925_IRQ_VCHG_SYSLOW_F] = {
 365                 .reg            = MAX8925_CHG_IRQ2,
 366                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 367                 .offs           = 1 << 2,
 368         },
 369         [MAX8925_IRQ_VCHG_SYSLOW_R] = {
 370                 .reg            = MAX8925_CHG_IRQ2,
 371                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 372                 .offs           = 1 << 3,
 373         },
 374         [MAX8925_IRQ_VCHG_RST] = {
 375                 .reg            = MAX8925_CHG_IRQ2,
 376                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 377                 .offs           = 1 << 4,
 378         },
 379         [MAX8925_IRQ_VCHG_DONE] = {
 380                 .reg            = MAX8925_CHG_IRQ2,
 381                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 382                 .offs           = 1 << 5,
 383         },
 384         [MAX8925_IRQ_VCHG_TOPOFF] = {
 385                 .reg            = MAX8925_CHG_IRQ2,
 386                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 387                 .offs           = 1 << 6,
 388         },
 389         [MAX8925_IRQ_VCHG_TMR_FAULT] = {
 390                 .reg            = MAX8925_CHG_IRQ2,
 391                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 392                 .offs           = 1 << 7,
 393         },
 394         [MAX8925_IRQ_GPM_RSTIN] = {
 395                 .reg            = MAX8925_ON_OFF_IRQ1,
 396                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 397                 .offs           = 1 << 0,
 398         },
 399         [MAX8925_IRQ_GPM_MPL] = {
 400                 .reg            = MAX8925_ON_OFF_IRQ1,
 401                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 402                 .offs           = 1 << 1,
 403         },
 404         [MAX8925_IRQ_GPM_SW_3SEC] = {
 405                 .reg            = MAX8925_ON_OFF_IRQ1,
 406                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 407                 .offs           = 1 << 2,
 408         },
 409         [MAX8925_IRQ_GPM_EXTON_F] = {
 410                 .reg            = MAX8925_ON_OFF_IRQ1,
 411                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 412                 .offs           = 1 << 3,
 413         },
 414         [MAX8925_IRQ_GPM_EXTON_R] = {
 415                 .reg            = MAX8925_ON_OFF_IRQ1,
 416                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 417                 .offs           = 1 << 4,
 418         },
 419         [MAX8925_IRQ_GPM_SW_1SEC] = {
 420                 .reg            = MAX8925_ON_OFF_IRQ1,
 421                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 422                 .offs           = 1 << 5,
 423         },
 424         [MAX8925_IRQ_GPM_SW_F] = {
 425                 .reg            = MAX8925_ON_OFF_IRQ1,
 426                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 427                 .offs           = 1 << 6,
 428         },
 429         [MAX8925_IRQ_GPM_SW_R] = {
 430                 .reg            = MAX8925_ON_OFF_IRQ1,
 431                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 432                 .offs           = 1 << 7,
 433         },
 434         [MAX8925_IRQ_GPM_SYSCKEN_F] = {
 435                 .reg            = MAX8925_ON_OFF_IRQ2,
 436                 .mask_reg       = MAX8925_ON_OFF_IRQ2_MASK,
 437                 .offs           = 1 << 0,
 438         },
 439         [MAX8925_IRQ_GPM_SYSCKEN_R] = {
 440                 .reg            = MAX8925_ON_OFF_IRQ2,
 441                 .mask_reg       = MAX8925_ON_OFF_IRQ2_MASK,
 442                 .offs           = 1 << 1,
 443         },
 444         [MAX8925_IRQ_RTC_ALARM1] = {
 445                 .reg            = MAX8925_RTC_IRQ,
 446                 .mask_reg       = MAX8925_RTC_IRQ_MASK,
 447                 .offs           = 1 << 2,
 448                 .flags          = FLAGS_RTC,
 449         },
 450         [MAX8925_IRQ_RTC_ALARM0] = {
 451                 .reg            = MAX8925_RTC_IRQ,
 452                 .mask_reg       = MAX8925_RTC_IRQ_MASK,
 453                 .offs           = 1 << 3,
 454                 .flags          = FLAGS_RTC,
 455         },
 456         [MAX8925_IRQ_TSC_STICK] = {
 457                 .reg            = MAX8925_TSC_IRQ,
 458                 .mask_reg       = MAX8925_TSC_IRQ_MASK,
 459                 .offs           = 1 << 0,
 460                 .flags          = FLAGS_ADC,
 461                 .tsc_irq        = 1,
 462         },
 463         [MAX8925_IRQ_TSC_NSTICK] = {
 464                 .reg            = MAX8925_TSC_IRQ,
 465                 .mask_reg       = MAX8925_TSC_IRQ_MASK,
 466                 .offs           = 1 << 1,
 467                 .flags          = FLAGS_ADC,
 468                 .tsc_irq        = 1,
 469         },
 470 };
 471
 472 static inline struct max8925_irq_data *irq_to_max8925(struct max8925_chip *chip,
 473                                                       int irq)
 474 {
 475         return &max8925_irqs[irq - chip->irq_base];
 476 }
 477
 478 static irqreturn_t max8925_irq(int irq, void *data)
 479 {
 480         struct max8925_chip *chip = data;
 481         struct max8925_irq_data *irq_data;
 482         struct i2c_client *i2c;
 483         int read_reg = -1, value = 0;
 484         int i;
 485
 486         for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
 487                 irq_data = &max8925_irqs[i];
 488                 /* TSC IRQ should be serviced in max8925_tsc_irq() */
 489                 if (irq_data->tsc_irq)
 490                         continue;
 491                 if (irq_data->flags == FLAGS_RTC)
 492                         i2c = chip->rtc;
 493                 else if (irq_data->flags == FLAGS_ADC)
 494                         i2c = chip->adc;
 495                 else
 496                         i2c = chip->i2c;
 497                 if (read_reg != irq_data->reg) {
 498                         read_reg = irq_data->reg;
 499                         value = max8925_reg_read(i2c, irq_data->reg);
 500                 }
 501                 if (value & irq_data->enable)
 502                         handle_nested_irq(chip->irq_base + i);
 503         }
 504         return IRQ_HANDLED;
 505 }
 506
 507 static irqreturn_t max8925_tsc_irq(int irq, void *data)
 508 {
 509         struct max8925_chip *chip = data;
 510         struct max8925_irq_data *irq_data;
 511         struct i2c_client *i2c;
 512         int read_reg = -1, value = 0;
 513         int i;
 514
 515         for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
 516                 irq_data = &max8925_irqs[i];
 517                 /* non TSC IRQ should be serviced in max8925_irq() */
 518                 if (!irq_data->tsc_irq)
 519                         continue;
 520                 if (irq_data->flags == FLAGS_RTC)
 521                         i2c = chip->rtc;
 522                 else if (irq_data->flags == FLAGS_ADC)
 523                         i2c = chip->adc;
 524                 else
 525                         i2c = chip->i2c;
 526                 if (read_reg != irq_data->reg) {
 527                         read_reg = irq_data->reg;
 528                         value = max8925_reg_read(i2c, irq_data->reg);
 529                 }
 530                 if (value & irq_data->enable)
 531                         handle_nested_irq(chip->irq_base + i);
 532         }
 533         return IRQ_HANDLED;
 534 }
 535
 536 static void max8925_irq_lock(struct irq_data *data)
 537 {
 538         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 539
 540         mutex_lock(&chip->irq_lock);
 541 }
 542
 543 static void max8925_irq_sync_unlock(struct irq_data *data)
 544 {
 545         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 546         struct max8925_irq_data *irq_data;
 547         static unsigned char cache_chg[2] = {0xff, 0xff};
 548         static unsigned char cache_on[2] = {0xff, 0xff};
 549         static unsigned char cache_rtc = 0xff, cache_tsc = 0xff;
 550         unsigned char irq_chg[2], irq_on[2];
 551         unsigned char irq_rtc, irq_tsc;
 552         int i;
 553
 554         /* Load cached value. In initial, all IRQs are masked */
 555         irq_chg[0] = cache_chg[0];
 556         irq_chg[1] = cache_chg[1];
 557         irq_on[0] = cache_on[0];
 558         irq_on[1] = cache_on[1];
 559         irq_rtc = cache_rtc;
 560         irq_tsc = cache_tsc;
 561         for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
 562                 irq_data = &max8925_irqs[i];
 563                 /* 1 -- disable, 0 -- enable */
 564                 switch (irq_data->mask_reg) {
 565                 case MAX8925_CHG_IRQ1_MASK:
 566                         irq_chg[0] &= ~irq_data->enable;
 567                         break;
 568                 case MAX8925_CHG_IRQ2_MASK:
 569                         irq_chg[1] &= ~irq_data->enable;
 570                         break;
 571                 case MAX8925_ON_OFF_IRQ1_MASK:
 572                         irq_on[0] &= ~irq_data->enable;
 573                         break;
 574                 case MAX8925_ON_OFF_IRQ2_MASK:
 575                         irq_on[1] &= ~irq_data->enable;
 576                         break;
 577                 case MAX8925_RTC_IRQ_MASK:
 578                         irq_rtc &= ~irq_data->enable;
 579                         break;
 580                 case MAX8925_TSC_IRQ_MASK:
 581                         irq_tsc &= ~irq_data->enable;
 582                         break;
 583                 default:
 584                         dev_err(chip->dev, "wrong IRQ\n");
 585                         break;
 586                 }
 587         }
 588         /* update mask into registers */
 589         if (cache_chg[0] != irq_chg[0]) {
 590                 cache_chg[0] = irq_chg[0];
 591                 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK,
 592                         irq_chg[0]);
 593         }
 594         if (cache_chg[1] != irq_chg[1]) {
 595                 cache_chg[1] = irq_chg[1];
 596                 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK,
 597                         irq_chg[1]);
 598         }
 599         if (cache_on[0] != irq_on[0]) {
 600                 cache_on[0] = irq_on[0];
 601                 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK,
 602                                 irq_on[0]);
 603         }
 604         if (cache_on[1] != irq_on[1]) {
 605                 cache_on[1] = irq_on[1];
 606                 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK,
 607                                 irq_on[1]);
 608         }
 609         if (cache_rtc != irq_rtc) {
 610                 cache_rtc = irq_rtc;
 611                 max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, irq_rtc);
 612         }
 613         if (cache_tsc != irq_tsc) {
 614                 cache_tsc = irq_tsc;
 615                 max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, irq_tsc);
 616         }
 617
 618         mutex_unlock(&chip->irq_lock);
 619 }
 620
 621 static void max8925_irq_enable(struct irq_data *data)
 622 {
 623         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 624
 625         max8925_irqs[data->irq - chip->irq_base].enable
 626                 = max8925_irqs[data->irq - chip->irq_base].offs;
 627 }
 628
 629 static void max8925_irq_disable(struct irq_data *data)
 630 {
 631         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 632
 633         max8925_irqs[data->irq - chip->irq_base].enable = 0;
 634 }
 635
 636 static struct irq_chip max8925_irq_chip = {
 637         .name           = "max8925",
 638         .irq_bus_lock   = max8925_irq_lock,
 639         .irq_bus_sync_unlock = max8925_irq_sync_unlock,
 640         .irq_enable     = max8925_irq_enable,
 641         .irq_disable    = max8925_irq_disable,
 642 };
 643
 644 static int max8925_irq_domain_map(struct irq_domain *d, unsigned int virq,
 645                                  irq_hw_number_t hw)
 646 {
 647         irq_set_chip_data(virq, d->host_data);
 648         irq_set_chip_and_handler(virq, &max8925_irq_chip, handle_edge_irq);
 649         irq_set_nested_thread(virq, 1);
 650         irq_set_noprobe(virq);
 651
 652         return 0;
 653 }
 654
 655 static const struct irq_domain_ops max8925_irq_domain_ops = {
 656         .map    = max8925_irq_domain_map,
 657         .xlate  = irq_domain_xlate_onetwocell,
 658 };
 659
 660
 661 static int max8925_irq_init(struct max8925_chip *chip, int irq,
 662                             struct max8925_platform_data *pdata)
 663 {
 664         unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
 665         int ret;
 666         struct device_node *node = chip->dev->of_node;
 667
 668         /* clear all interrupts */
 669         max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ1);
 670         max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ2);
 671         max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ1);
 672         max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ2);
 673         max8925_reg_read(chip->rtc, MAX8925_RTC_IRQ);
 674         max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
 675         /* mask all interrupts except for TSC */
 676         max8925_reg_write(chip->rtc, MAX8925_ALARM0_CNTL, 0);
 677         max8925_reg_write(chip->rtc, MAX8925_ALARM1_CNTL, 0);
 678         max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 0xff);
 679         max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 0xff);
 680         max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff);
 681         max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 0xff);
 682         max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, 0xff);
 683
 684         mutex_init(&chip->irq_lock);
 685         chip->irq_base = irq_alloc_descs(-1, 0, MAX8925_NR_IRQS, 0);
 686         if (chip->irq_base < 0) {
 687                 dev_err(chip->dev, "Failed to allocate interrupts, ret:%d\n",
 688                         chip->irq_base);
 689                 return -EBUSY;
 690         }
 691
 692         irq_domain_add_legacy(node, MAX8925_NR_IRQS, chip->irq_base, 0,
 693                               &max8925_irq_domain_ops, chip);
 694
 695         /* request irq handler for pmic main irq*/
 696         chip->core_irq = irq;
 697         if (!chip->core_irq)
 698                 return -EBUSY;
 699         ret = request_threaded_irq(irq, NULL, max8925_irq, flags | IRQF_ONESHOT,
 700                                    "max8925", chip);
 701         if (ret) {
 702                 dev_err(chip->dev, "Failed to request core IRQ: %d\n", ret);
 703                 chip->core_irq = 0;
 704                 return -EBUSY;
 705         }
 706
 707         /* request irq handler for pmic tsc irq*/
 708
 709         /* mask TSC interrupt */
 710         max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, 0x0f);
 711
 712         if (!pdata->tsc_irq) {
 713                 dev_warn(chip->dev, "No interrupt support on TSC IRQ\n");
 714                 return 0;
 715         }
 716         chip->tsc_irq = pdata->tsc_irq;
 717         ret = request_threaded_irq(chip->tsc_irq, NULL, max8925_tsc_irq,
 718                                    flags | IRQF_ONESHOT, "max8925-tsc", chip);
 719         if (ret) {
 720                 dev_err(chip->dev, "Failed to request TSC IRQ: %d\n", ret);
 721                 chip->tsc_irq = 0;
 722         }
 723         return 0;
 724 }
 725
 726 static void init_regulator(struct max8925_chip *chip,
 727                                      struct max8925_platform_data *pdata)
 728 {
 729         int ret;
 730
 731         if (!pdata)
 732                 return;
 733         if (pdata->sd1) {
 734                 reg_devs[0].platform_data = pdata->sd1;
 735                 reg_devs[0].pdata_size = sizeof(struct regulator_init_data);
 736         }
 737         if (pdata->sd2) {
 738                 reg_devs[1].platform_data = pdata->sd2;
 739                 reg_devs[1].pdata_size = sizeof(struct regulator_init_data);
 740         }
 741         if (pdata->sd3) {
 742                 reg_devs[2].platform_data = pdata->sd3;
 743                 reg_devs[2].pdata_size = sizeof(struct regulator_init_data);
 744         }
 745         if (pdata->ldo1) {
 746                 reg_devs[3].platform_data = pdata->ldo1;
 747                 reg_devs[3].pdata_size = sizeof(struct regulator_init_data);
 748         }
 749         if (pdata->ldo2) {
 750                 reg_devs[4].platform_data = pdata->ldo2;
 751                 reg_devs[4].pdata_size = sizeof(struct regulator_init_data);
 752         }
 753         if (pdata->ldo3) {
 754                 reg_devs[5].platform_data = pdata->ldo3;
 755                 reg_devs[5].pdata_size = sizeof(struct regulator_init_data);
 756         }
 757         if (pdata->ldo4) {
 758                 reg_devs[6].platform_data = pdata->ldo4;
 759                 reg_devs[6].pdata_size = sizeof(struct regulator_init_data);
 760         }
 761         if (pdata->ldo5) {
 762                 reg_devs[7].platform_data = pdata->ldo5;
 763                 reg_devs[7].pdata_size = sizeof(struct regulator_init_data);
 764         }
 765         if (pdata->ldo6) {
 766                 reg_devs[8].platform_data = pdata->ldo6;
 767                 reg_devs[8].pdata_size = sizeof(struct regulator_init_data);
 768         }
 769         if (pdata->ldo7) {
 770                 reg_devs[9].platform_data = pdata->ldo7;
 771                 reg_devs[9].pdata_size = sizeof(struct regulator_init_data);
 772         }
 773         if (pdata->ldo8) {
 774                 reg_devs[10].platform_data = pdata->ldo8;
 775                 reg_devs[10].pdata_size = sizeof(struct regulator_init_data);
 776         }
 777         if (pdata->ldo9) {
 778                 reg_devs[11].platform_data = pdata->ldo9;
 779                 reg_devs[11].pdata_size = sizeof(struct regulator_init_data);
 780         }
 781         if (pdata->ldo10) {
 782                 reg_devs[12].platform_data = pdata->ldo10;
 783                 reg_devs[12].pdata_size = sizeof(struct regulator_init_data);
 784         }
 785         if (pdata->ldo11) {
 786                 reg_devs[13].platform_data = pdata->ldo11;
 787                 reg_devs[13].pdata_size = sizeof(struct regulator_init_data);
 788         }
 789         if (pdata->ldo12) {
 790                 reg_devs[14].platform_data = pdata->ldo12;
 791                 reg_devs[14].pdata_size = sizeof(struct regulator_init_data);
 792         }
 793         if (pdata->ldo13) {
 794                 reg_devs[15].platform_data = pdata->ldo13;
 795                 reg_devs[15].pdata_size = sizeof(struct regulator_init_data);
 796         }
 797         if (pdata->ldo14) {
 798                 reg_devs[16].platform_data = pdata->ldo14;
 799                 reg_devs[16].pdata_size = sizeof(struct regulator_init_data);
 800         }
 801         if (pdata->ldo15) {
 802                 reg_devs[17].platform_data = pdata->ldo15;
 803                 reg_devs[17].pdata_size = sizeof(struct regulator_init_data);
 804         }
 805         if (pdata->ldo16) {
 806                 reg_devs[18].platform_data = pdata->ldo16;
 807                 reg_devs[18].pdata_size = sizeof(struct regulator_init_data);
 808         }
 809         if (pdata->ldo17) {
 810                 reg_devs[19].platform_data = pdata->ldo17;
 811                 reg_devs[19].pdata_size = sizeof(struct regulator_init_data);
 812         }
 813         if (pdata->ldo18) {
 814                 reg_devs[20].platform_data = pdata->ldo18;
 815                 reg_devs[20].pdata_size = sizeof(struct regulator_init_data);
 816         }
 817         if (pdata->ldo19) {
 818                 reg_devs[21].platform_data = pdata->ldo19;
 819                 reg_devs[21].pdata_size = sizeof(struct regulator_init_data);
 820         }
 821         if (pdata->ldo20) {
 822                 reg_devs[22].platform_data = pdata->ldo20;
 823                 reg_devs[22].pdata_size = sizeof(struct regulator_init_data);
 824         }
 825         ret = mfd_add_devices(chip->dev, 0, reg_devs, ARRAY_SIZE(reg_devs),
 826                               NULL, 0, NULL);
 827         if (ret < 0) {
 828                 dev_err(chip->dev, "Failed to add regulator subdev\n");
 829                 return;
 830         }
 831 }
 832
 833 int max8925_device_init(struct max8925_chip *chip,
 834                                   struct max8925_platform_data *pdata)
 835 {
 836         int ret;
 837
 838         max8925_irq_init(chip, chip->i2c->irq, pdata);
 839
 840         if (pdata && (pdata->power || pdata->touch)) {
 841                 /* enable ADC to control internal reference */
 842                 max8925_set_bits(chip->i2c, MAX8925_RESET_CNFG, 1, 1);
 843                 /* enable internal reference for ADC */
 844                 max8925_set_bits(chip->adc, MAX8925_TSC_CNFG1, 3, 2);
 845                 /* check for internal reference IRQ */
 846                 do {
 847                         ret = max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
 848                 } while (ret & MAX8925_NREF_OK);
 849                 /* enaable ADC scheduler, interval is 1 second */
 850                 max8925_set_bits(chip->adc, MAX8925_ADC_SCHED, 3, 2);
 851         }
 852
 853         /* enable Momentary Power Loss */
 854         max8925_set_bits(chip->rtc, MAX8925_MPL_CNTL, 1 << 4, 1 << 4);
 855
 856         ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
 857                               ARRAY_SIZE(rtc_devs),
 858                               NULL, chip->irq_base, NULL);
 859         if (ret < 0) {
 860                 dev_err(chip->dev, "Failed to add rtc subdev\n");
 861                 goto out;
 862         }
 863
 864         ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
 865                               ARRAY_SIZE(onkey_devs),
 866                               NULL, chip->irq_base, NULL);
 867         if (ret < 0) {
 868                 dev_err(chip->dev, "Failed to add onkey subdev\n");
 869                 goto out_dev;
 870         }
 871
 872         init_regulator(chip, pdata);
 873
 874         if (pdata && pdata->backlight) {
 875                 bk_devs[0].platform_data = &pdata->backlight;
 876                 bk_devs[0].pdata_size = sizeof(struct max8925_backlight_pdata);
 877         }
 878         ret = mfd_add_devices(chip->dev, 0, bk_devs, ARRAY_SIZE(bk_devs),
 879                               NULL, 0, NULL);
 880         if (ret < 0) {
 881                 dev_err(chip->dev, "Failed to add backlight subdev\n");
 882                 goto out_dev;
 883         }
 884
 885         ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
 886                               ARRAY_SIZE(power_devs),
 887                               NULL, 0, NULL);
 888         if (ret < 0) {
 889                 dev_err(chip->dev,
 890                         "Failed to add power supply subdev, err = %d\n", ret);
 891                 goto out_dev;
 892         }
 893
 894         if (pdata && pdata->touch) {
 895                 ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
 896                                       ARRAY_SIZE(touch_devs),
 897                                       NULL, chip->tsc_irq, NULL);
 898                 if (ret < 0) {
 899                         dev_err(chip->dev, "Failed to add touch subdev\n");
 900                         goto out_dev;
 901                 }
 902         }
 903
 904         return 0;
 905 out_dev:
 906         mfd_remove_devices(chip->dev);
 907 out:
 908         return ret;
 909 }
 910
 911 void max8925_device_exit(struct max8925_chip *chip)
 912 {
 913         if (chip->core_irq)
 914                 free_irq(chip->core_irq, chip);
 915         if (chip->tsc_irq)
 916                 free_irq(chip->tsc_irq, chip);
 917         mfd_remove_devices(chip->dev);
 918 }