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