drivers/mfd/max8925-core.c

   1 /*
   2  * Base driver for Maxim MAX8925
   3  *
   4  * Copyright (C) 2009-2010 Marvell International Ltd.
   5  *      Haojian Zhuang <haojian.zhuang@marvell.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/i2c.h>
  15 #include <linux/irq.h>
  16 #include <linux/interrupt.h>
  17 #include <linux/irqdomain.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/regulator/machine.h>
  20 #include <linux/mfd/core.h>
  21 #include <linux/mfd/max8925.h>
  22 #include <linux/of.h>
  23 #include <linux/of_platform.h>
  24
  25 static struct resource bk_resources[] = {
  26         { 0x84, 0x84, "mode control", IORESOURCE_REG, },
  27         { 0x85, 0x85, "control",      IORESOURCE_REG, },
  28 };
  29
  30 static struct mfd_cell bk_devs[] = {
  31         {
  32                 .name           = "max8925-backlight",
  33                 .num_resources  = ARRAY_SIZE(bk_resources),
  34                 .resources      = &bk_resources[0],
  35                 .id             = -1,
  36         },
  37 };
  38
  39 static struct resource touch_resources[] = {
  40         {
  41                 .name   = "max8925-tsc",
  42                 .start  = MAX8925_TSC_IRQ,
  43                 .end    = MAX8925_ADC_RES_END,
  44                 .flags  = IORESOURCE_REG,
  45         },
  46 };
  47
  48 static const struct mfd_cell touch_devs[] = {
  49         {
  50                 .name           = "max8925-touch",
  51                 .num_resources  = 1,
  52                 .resources      = &touch_resources[0],
  53                 .id             = -1,
  54         },
  55 };
  56
  57 static struct resource power_supply_resources[] = {
  58         {
  59                 .name   = "max8925-power",
  60                 .start  = MAX8925_CHG_IRQ1,
  61                 .end    = MAX8925_CHG_IRQ1_MASK,
  62                 .flags  = IORESOURCE_REG,
  63         },
  64 };
  65
  66 static const struct mfd_cell power_devs[] = {
  67         {
  68                 .name           = "max8925-power",
  69                 .num_resources  = 1,
  70                 .resources      = &power_supply_resources[0],
  71                 .id             = -1,
  72         },
  73 };
  74
  75 static struct resource rtc_resources[] = {
  76         {
  77                 .name   = "max8925-rtc",
  78                 .start  = MAX8925_IRQ_RTC_ALARM0,
  79                 .end    = MAX8925_IRQ_RTC_ALARM0,
  80                 .flags  = IORESOURCE_IRQ,
  81         },
  82 };
  83
  84 static const struct mfd_cell rtc_devs[] = {
  85         {
  86                 .name           = "max8925-rtc",
  87                 .num_resources  = 1,
  88                 .resources      = &rtc_resources[0],
  89                 .id             = -1,
  90         },
  91 };
  92
  93 static struct resource onkey_resources[] = {
  94         {
  95                 .name   = "max8925-onkey",
  96                 .start  = MAX8925_IRQ_GPM_SW_R,
  97                 .end    = MAX8925_IRQ_GPM_SW_R,
  98                 .flags  = IORESOURCE_IRQ,
  99         }, {
 100                 .name   = "max8925-onkey",
 101                 .start  = MAX8925_IRQ_GPM_SW_F,
 102                 .end    = MAX8925_IRQ_GPM_SW_F,
 103                 .flags  = IORESOURCE_IRQ,
 104         },
 105 };
 106
 107 static const struct mfd_cell onkey_devs[] = {
 108         {
 109                 .name           = "max8925-onkey",
 110                 .num_resources  = 2,
 111                 .resources      = &onkey_resources[0],
 112                 .id             = -1,
 113         },
 114 };
 115
 116 static struct resource sd1_resources[] = {
 117         {0x06, 0x06, "sdv", IORESOURCE_REG, },
 118 };
 119
 120 static struct resource sd2_resources[] = {
 121         {0x09, 0x09, "sdv", IORESOURCE_REG, },
 122 };
 123
 124 static struct resource sd3_resources[] = {
 125         {0x0c, 0x0c, "sdv", IORESOURCE_REG, },
 126 };
 127
 128 static struct resource ldo1_resources[] = {
 129         {0x1a, 0x1a, "ldov", IORESOURCE_REG, },
 130 };
 131
 132 static struct resource ldo2_resources[] = {
 133         {0x1e, 0x1e, "ldov", IORESOURCE_REG, },
 134 };
 135
 136 static struct resource ldo3_resources[] = {
 137         {0x22, 0x22, "ldov", IORESOURCE_REG, },
 138 };
 139
 140 static struct resource ldo4_resources[] = {
 141         {0x26, 0x26, "ldov", IORESOURCE_REG, },
 142 };
 143
 144 static struct resource ldo5_resources[] = {
 145         {0x2a, 0x2a, "ldov", IORESOURCE_REG, },
 146 };
 147
 148 static struct resource ldo6_resources[] = {
 149         {0x2e, 0x2e, "ldov", IORESOURCE_REG, },
 150 };
 151
 152 static struct resource ldo7_resources[] = {
 153         {0x32, 0x32, "ldov", IORESOURCE_REG, },
 154 };
 155
 156 static struct resource ldo8_resources[] = {
 157         {0x36, 0x36, "ldov", IORESOURCE_REG, },
 158 };
 159
 160 static struct resource ldo9_resources[] = {
 161         {0x3a, 0x3a, "ldov", IORESOURCE_REG, },
 162 };
 163
 164 static struct resource ldo10_resources[] = {
 165         {0x3e, 0x3e, "ldov", IORESOURCE_REG, },
 166 };
 167
 168 static struct resource ldo11_resources[] = {
 169         {0x42, 0x42, "ldov", IORESOURCE_REG, },
 170 };
 171
 172 static struct resource ldo12_resources[] = {
 173         {0x46, 0x46, "ldov", IORESOURCE_REG, },
 174 };
 175
 176 static struct resource ldo13_resources[] = {
 177         {0x4a, 0x4a, "ldov", IORESOURCE_REG, },
 178 };
 179
 180 static struct resource ldo14_resources[] = {
 181         {0x4e, 0x4e, "ldov", IORESOURCE_REG, },
 182 };
 183
 184 static struct resource ldo15_resources[] = {
 185         {0x52, 0x52, "ldov", IORESOURCE_REG, },
 186 };
 187
 188 static struct resource ldo16_resources[] = {
 189         {0x12, 0x12, "ldov", IORESOURCE_REG, },
 190 };
 191
 192 static struct resource ldo17_resources[] = {
 193         {0x16, 0x16, "ldov", IORESOURCE_REG, },
 194 };
 195
 196 static struct resource ldo18_resources[] = {
 197         {0x74, 0x74, "ldov", IORESOURCE_REG, },
 198 };
 199
 200 static struct resource ldo19_resources[] = {
 201         {0x5e, 0x5e, "ldov", IORESOURCE_REG, },
 202 };
 203
 204 static struct resource ldo20_resources[] = {
 205         {0x9e, 0x9e, "ldov", IORESOURCE_REG, },
 206 };
 207
 208 static struct mfd_cell reg_devs[] = {
 209         {
 210                 .name = "max8925-regulator",
 211                 .id = 0,
 212                 .num_resources = ARRAY_SIZE(sd1_resources),
 213                 .resources = sd1_resources,
 214         }, {
 215                 .name = "max8925-regulator",
 216                 .id = 1,
 217                 .num_resources = ARRAY_SIZE(sd2_resources),
 218                 .resources = sd2_resources,
 219         }, {
 220                 .name = "max8925-regulator",
 221                 .id = 2,
 222                 .num_resources = ARRAY_SIZE(sd3_resources),
 223                 .resources = sd3_resources,
 224         }, {
 225                 .name = "max8925-regulator",
 226                 .id = 3,
 227                 .num_resources = ARRAY_SIZE(ldo1_resources),
 228                 .resources = ldo1_resources,
 229         }, {
 230                 .name = "max8925-regulator",
 231                 .id = 4,
 232                 .num_resources = ARRAY_SIZE(ldo2_resources),
 233                 .resources = ldo2_resources,
 234         }, {
 235                 .name = "max8925-regulator",
 236                 .id = 5,
 237                 .num_resources = ARRAY_SIZE(ldo3_resources),
 238                 .resources = ldo3_resources,
 239         }, {
 240                 .name = "max8925-regulator",
 241                 .id = 6,
 242                 .num_resources = ARRAY_SIZE(ldo4_resources),
 243                 .resources = ldo4_resources,
 244         }, {
 245                 .name = "max8925-regulator",
 246                 .id = 7,
 247                 .num_resources = ARRAY_SIZE(ldo5_resources),
 248                 .resources = ldo5_resources,
 249         }, {
 250                 .name = "max8925-regulator",
 251                 .id = 8,
 252                 .num_resources = ARRAY_SIZE(ldo6_resources),
 253                 .resources = ldo6_resources,
 254         }, {
 255                 .name = "max8925-regulator",
 256                 .id = 9,
 257                 .num_resources = ARRAY_SIZE(ldo7_resources),
 258                 .resources = ldo7_resources,
 259         }, {
 260                 .name = "max8925-regulator",
 261                 .id = 10,
 262                 .num_resources = ARRAY_SIZE(ldo8_resources),
 263                 .resources = ldo8_resources,
 264         }, {
 265                 .name = "max8925-regulator",
 266                 .id = 11,
 267                 .num_resources = ARRAY_SIZE(ldo9_resources),
 268                 .resources = ldo9_resources,
 269         }, {
 270                 .name = "max8925-regulator",
 271                 .id = 12,
 272                 .num_resources = ARRAY_SIZE(ldo10_resources),
 273                 .resources = ldo10_resources,
 274         }, {
 275                 .name = "max8925-regulator",
 276                 .id = 13,
 277                 .num_resources = ARRAY_SIZE(ldo11_resources),
 278                 .resources = ldo11_resources,
 279         }, {
 280                 .name = "max8925-regulator",
 281                 .id = 14,
 282                 .num_resources = ARRAY_SIZE(ldo12_resources),
 283                 .resources = ldo12_resources,
 284         }, {
 285                 .name = "max8925-regulator",
 286                 .id = 15,
 287                 .num_resources = ARRAY_SIZE(ldo13_resources),
 288                 .resources = ldo13_resources,
 289         }, {
 290                 .name = "max8925-regulator",
 291                 .id = 16,
 292                 .num_resources = ARRAY_SIZE(ldo14_resources),
 293                 .resources = ldo14_resources,
 294         }, {
 295                 .name = "max8925-regulator",
 296                 .id = 17,
 297                 .num_resources = ARRAY_SIZE(ldo15_resources),
 298                 .resources = ldo15_resources,
 299         }, {
 300                 .name = "max8925-regulator",
 301                 .id = 18,
 302                 .num_resources = ARRAY_SIZE(ldo16_resources),
 303                 .resources = ldo16_resources,
 304         }, {
 305                 .name = "max8925-regulator",
 306                 .id = 19,
 307                 .num_resources = ARRAY_SIZE(ldo17_resources),
 308                 .resources = ldo17_resources,
 309         }, {
 310                 .name = "max8925-regulator",
 311                 .id = 20,
 312                 .num_resources = ARRAY_SIZE(ldo18_resources),
 313                 .resources = ldo18_resources,
 314         }, {
 315                 .name = "max8925-regulator",
 316                 .id = 21,
 317                 .num_resources = ARRAY_SIZE(ldo19_resources),
 318                 .resources = ldo19_resources,
 319         }, {
 320                 .name = "max8925-regulator",
 321                 .id = 22,
 322                 .num_resources = ARRAY_SIZE(ldo20_resources),
 323                 .resources = ldo20_resources,
 324         },
 325 };
 326
 327 enum {
 328         FLAGS_ADC = 1,  /* register in ADC component */
 329         FLAGS_RTC,      /* register in RTC component */
 330 };
 331
 332 struct max8925_irq_data {
 333         int     reg;
 334         int     mask_reg;
 335         int     enable;         /* enable or not */
 336         int     offs;           /* bit offset in mask register */
 337         int     flags;
 338         int     tsc_irq;
 339 };
 340
 341 static struct max8925_irq_data max8925_irqs[] = {
 342         [MAX8925_IRQ_VCHG_DC_OVP] = {
 343                 .reg            = MAX8925_CHG_IRQ1,
 344                 .mask_reg       = MAX8925_CHG_IRQ1_MASK,
 345                 .offs           = 1 << 0,
 346         },
 347         [MAX8925_IRQ_VCHG_DC_F] = {
 348                 .reg            = MAX8925_CHG_IRQ1,
 349                 .mask_reg       = MAX8925_CHG_IRQ1_MASK,
 350                 .offs           = 1 << 1,
 351         },
 352         [MAX8925_IRQ_VCHG_DC_R] = {
 353                 .reg            = MAX8925_CHG_IRQ1,
 354                 .mask_reg       = MAX8925_CHG_IRQ1_MASK,
 355                 .offs           = 1 << 2,
 356         },
 357         [MAX8925_IRQ_VCHG_THM_OK_R] = {
 358                 .reg            = MAX8925_CHG_IRQ2,
 359                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 360                 .offs           = 1 << 0,
 361         },
 362         [MAX8925_IRQ_VCHG_THM_OK_F] = {
 363                 .reg            = MAX8925_CHG_IRQ2,
 364                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 365                 .offs           = 1 << 1,
 366         },
 367         [MAX8925_IRQ_VCHG_SYSLOW_F] = {
 368                 .reg            = MAX8925_CHG_IRQ2,
 369                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 370                 .offs           = 1 << 2,
 371         },
 372         [MAX8925_IRQ_VCHG_SYSLOW_R] = {
 373                 .reg            = MAX8925_CHG_IRQ2,
 374                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 375                 .offs           = 1 << 3,
 376         },
 377         [MAX8925_IRQ_VCHG_RST] = {
 378                 .reg            = MAX8925_CHG_IRQ2,
 379                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 380                 .offs           = 1 << 4,
 381         },
 382         [MAX8925_IRQ_VCHG_DONE] = {
 383                 .reg            = MAX8925_CHG_IRQ2,
 384                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 385                 .offs           = 1 << 5,
 386         },
 387         [MAX8925_IRQ_VCHG_TOPOFF] = {
 388                 .reg            = MAX8925_CHG_IRQ2,
 389                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 390                 .offs           = 1 << 6,
 391         },
 392         [MAX8925_IRQ_VCHG_TMR_FAULT] = {
 393                 .reg            = MAX8925_CHG_IRQ2,
 394                 .mask_reg       = MAX8925_CHG_IRQ2_MASK,
 395                 .offs           = 1 << 7,
 396         },
 397         [MAX8925_IRQ_GPM_RSTIN] = {
 398                 .reg            = MAX8925_ON_OFF_IRQ1,
 399                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 400                 .offs           = 1 << 0,
 401         },
 402         [MAX8925_IRQ_GPM_MPL] = {
 403                 .reg            = MAX8925_ON_OFF_IRQ1,
 404                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 405                 .offs           = 1 << 1,
 406         },
 407         [MAX8925_IRQ_GPM_SW_3SEC] = {
 408                 .reg            = MAX8925_ON_OFF_IRQ1,
 409                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 410                 .offs           = 1 << 2,
 411         },
 412         [MAX8925_IRQ_GPM_EXTON_F] = {
 413                 .reg            = MAX8925_ON_OFF_IRQ1,
 414                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 415                 .offs           = 1 << 3,
 416         },
 417         [MAX8925_IRQ_GPM_EXTON_R] = {
 418                 .reg            = MAX8925_ON_OFF_IRQ1,
 419                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 420                 .offs           = 1 << 4,
 421         },
 422         [MAX8925_IRQ_GPM_SW_1SEC] = {
 423                 .reg            = MAX8925_ON_OFF_IRQ1,
 424                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 425                 .offs           = 1 << 5,
 426         },
 427         [MAX8925_IRQ_GPM_SW_F] = {
 428                 .reg            = MAX8925_ON_OFF_IRQ1,
 429                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 430                 .offs           = 1 << 6,
 431         },
 432         [MAX8925_IRQ_GPM_SW_R] = {
 433                 .reg            = MAX8925_ON_OFF_IRQ1,
 434                 .mask_reg       = MAX8925_ON_OFF_IRQ1_MASK,
 435                 .offs           = 1 << 7,
 436         },
 437         [MAX8925_IRQ_GPM_SYSCKEN_F] = {
 438                 .reg            = MAX8925_ON_OFF_IRQ2,
 439                 .mask_reg       = MAX8925_ON_OFF_IRQ2_MASK,
 440                 .offs           = 1 << 0,
 441         },
 442         [MAX8925_IRQ_GPM_SYSCKEN_R] = {
 443                 .reg            = MAX8925_ON_OFF_IRQ2,
 444                 .mask_reg       = MAX8925_ON_OFF_IRQ2_MASK,
 445                 .offs           = 1 << 1,
 446         },
 447         [MAX8925_IRQ_RTC_ALARM1] = {
 448                 .reg            = MAX8925_RTC_IRQ,
 449                 .mask_reg       = MAX8925_RTC_IRQ_MASK,
 450                 .offs           = 1 << 2,
 451                 .flags          = FLAGS_RTC,
 452         },
 453         [MAX8925_IRQ_RTC_ALARM0] = {
 454                 .reg            = MAX8925_RTC_IRQ,
 455                 .mask_reg       = MAX8925_RTC_IRQ_MASK,
 456                 .offs           = 1 << 3,
 457                 .flags          = FLAGS_RTC,
 458         },
 459         [MAX8925_IRQ_TSC_STICK] = {
 460                 .reg            = MAX8925_TSC_IRQ,
 461                 .mask_reg       = MAX8925_TSC_IRQ_MASK,
 462                 .offs           = 1 << 0,
 463                 .flags          = FLAGS_ADC,
 464                 .tsc_irq        = 1,
 465         },
 466         [MAX8925_IRQ_TSC_NSTICK] = {
 467                 .reg            = MAX8925_TSC_IRQ,
 468                 .mask_reg       = MAX8925_TSC_IRQ_MASK,
 469                 .offs           = 1 << 1,
 470                 .flags          = FLAGS_ADC,
 471                 .tsc_irq        = 1,
 472         },
 473 };
 474
 475 static inline struct max8925_irq_data *irq_to_max8925(struct max8925_chip *chip,
 476                                                       int irq)
 477 {
 478         return &max8925_irqs[irq - chip->irq_base];
 479 }
 480
 481 static irqreturn_t max8925_irq(int irq, void *data)
 482 {
 483         struct max8925_chip *chip = data;
 484         struct max8925_irq_data *irq_data;
 485         struct i2c_client *i2c;
 486         int read_reg = -1, value = 0;
 487         int i;
 488
 489         for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
 490                 irq_data = &max8925_irqs[i];
 491                 /* TSC IRQ should be serviced in max8925_tsc_irq() */
 492                 if (irq_data->tsc_irq)
 493                         continue;
 494                 if (irq_data->flags == FLAGS_RTC)
 495                         i2c = chip->rtc;
 496                 else if (irq_data->flags == FLAGS_ADC)
 497                         i2c = chip->adc;
 498                 else
 499                         i2c = chip->i2c;
 500                 if (read_reg != irq_data->reg) {
 501                         read_reg = irq_data->reg;
 502                         value = max8925_reg_read(i2c, irq_data->reg);
 503                 }
 504                 if (value & irq_data->enable)
 505                         handle_nested_irq(chip->irq_base + i);
 506         }
 507         return IRQ_HANDLED;
 508 }
 509
 510 static irqreturn_t max8925_tsc_irq(int irq, void *data)
 511 {
 512         struct max8925_chip *chip = data;
 513         struct max8925_irq_data *irq_data;
 514         struct i2c_client *i2c;
 515         int read_reg = -1, value = 0;
 516         int i;
 517
 518         for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
 519                 irq_data = &max8925_irqs[i];
 520                 /* non TSC IRQ should be serviced in max8925_irq() */
 521                 if (!irq_data->tsc_irq)
 522                         continue;
 523                 if (irq_data->flags == FLAGS_RTC)
 524                         i2c = chip->rtc;
 525                 else if (irq_data->flags == FLAGS_ADC)
 526                         i2c = chip->adc;
 527                 else
 528                         i2c = chip->i2c;
 529                 if (read_reg != irq_data->reg) {
 530                         read_reg = irq_data->reg;
 531                         value = max8925_reg_read(i2c, irq_data->reg);
 532                 }
 533                 if (value & irq_data->enable)
 534                         handle_nested_irq(chip->irq_base + i);
 535         }
 536         return IRQ_HANDLED;
 537 }
 538
 539 static void max8925_irq_lock(struct irq_data *data)
 540 {
 541         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 542
 543         mutex_lock(&chip->irq_lock);
 544 }
 545
 546 static void max8925_irq_sync_unlock(struct irq_data *data)
 547 {
 548         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 549         struct max8925_irq_data *irq_data;
 550         static unsigned char cache_chg[2] = {0xff, 0xff};
 551         static unsigned char cache_on[2] = {0xff, 0xff};
 552         static unsigned char cache_rtc = 0xff, cache_tsc = 0xff;
 553         unsigned char irq_chg[2], irq_on[2];
 554         unsigned char irq_rtc, irq_tsc;
 555         int i;
 556
 557         /* Load cached value. In initial, all IRQs are masked */
 558         irq_chg[0] = cache_chg[0];
 559         irq_chg[1] = cache_chg[1];
 560         irq_on[0] = cache_on[0];
 561         irq_on[1] = cache_on[1];
 562         irq_rtc = cache_rtc;
 563         irq_tsc = cache_tsc;
 564         for (i = 0; i < ARRAY_SIZE(max8925_irqs); i++) {
 565                 irq_data = &max8925_irqs[i];
 566                 /* 1 -- disable, 0 -- enable */
 567                 switch (irq_data->mask_reg) {
 568                 case MAX8925_CHG_IRQ1_MASK:
 569                         irq_chg[0] &= ~irq_data->enable;
 570                         break;
 571                 case MAX8925_CHG_IRQ2_MASK:
 572                         irq_chg[1] &= ~irq_data->enable;
 573                         break;
 574                 case MAX8925_ON_OFF_IRQ1_MASK:
 575                         irq_on[0] &= ~irq_data->enable;
 576                         break;
 577                 case MAX8925_ON_OFF_IRQ2_MASK:
 578                         irq_on[1] &= ~irq_data->enable;
 579                         break;
 580                 case MAX8925_RTC_IRQ_MASK:
 581                         irq_rtc &= ~irq_data->enable;
 582                         break;
 583                 case MAX8925_TSC_IRQ_MASK:
 584                         irq_tsc &= ~irq_data->enable;
 585                         break;
 586                 default:
 587                         dev_err(chip->dev, "wrong IRQ\n");
 588                         break;
 589                 }
 590         }
 591         /* update mask into registers */
 592         if (cache_chg[0] != irq_chg[0]) {
 593                 cache_chg[0] = irq_chg[0];
 594                 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK,
 595                         irq_chg[0]);
 596         }
 597         if (cache_chg[1] != irq_chg[1]) {
 598                 cache_chg[1] = irq_chg[1];
 599                 max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK,
 600                         irq_chg[1]);
 601         }
 602         if (cache_on[0] != irq_on[0]) {
 603                 cache_on[0] = irq_on[0];
 604                 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK,
 605                                 irq_on[0]);
 606         }
 607         if (cache_on[1] != irq_on[1]) {
 608                 cache_on[1] = irq_on[1];
 609                 max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK,
 610                                 irq_on[1]);
 611         }
 612         if (cache_rtc != irq_rtc) {
 613                 cache_rtc = irq_rtc;
 614                 max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, irq_rtc);
 615         }
 616         if (cache_tsc != irq_tsc) {
 617                 cache_tsc = irq_tsc;
 618                 max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, irq_tsc);
 619         }
 620
 621         mutex_unlock(&chip->irq_lock);
 622 }
 623
 624 static void max8925_irq_enable(struct irq_data *data)
 625 {
 626         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 627
 628         max8925_irqs[data->irq - chip->irq_base].enable
 629                 = max8925_irqs[data->irq - chip->irq_base].offs;
 630 }
 631
 632 static void max8925_irq_disable(struct irq_data *data)
 633 {
 634         struct max8925_chip *chip = irq_data_get_irq_chip_data(data);
 635
 636         max8925_irqs[data->irq - chip->irq_base].enable = 0;
 637 }
 638
 639 static struct irq_chip max8925_irq_chip = {
 640         .name           = "max8925",
 641         .irq_bus_lock   = max8925_irq_lock,
 642         .irq_bus_sync_unlock = max8925_irq_sync_unlock,
 643         .irq_enable     = max8925_irq_enable,
 644         .irq_disable    = max8925_irq_disable,
 645 };
 646
 647 static int max8925_irq_domain_map(struct irq_domain *d, unsigned int virq,
 648                                  irq_hw_number_t hw)
 649 {
 650         irq_set_chip_data(virq, d->host_data);
 651         irq_set_chip_and_handler(virq, &max8925_irq_chip, handle_edge_irq);
 652         irq_set_nested_thread(virq, 1);
 653 #ifdef CONFIG_ARM
 654         set_irq_flags(virq, IRQF_VALID);
 655 #else
 656         irq_set_noprobe(virq);
 657 #endif
 658         return 0;
 659 }
 660
 661 static struct irq_domain_ops max8925_irq_domain_ops = {
 662         .map    = max8925_irq_domain_map,
 663         .xlate  = irq_domain_xlate_onetwocell,
 664 };
 665
 666
 667 static int max8925_irq_init(struct max8925_chip *chip, int irq,
 668                             struct max8925_platform_data *pdata)
 669 {
 670         unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
 671         int ret;
 672         struct device_node *node = chip->dev->of_node;
 673
 674         /* clear all interrupts */
 675         max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ1);
 676         max8925_reg_read(chip->i2c, MAX8925_CHG_IRQ2);
 677         max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ1);
 678         max8925_reg_read(chip->i2c, MAX8925_ON_OFF_IRQ2);
 679         max8925_reg_read(chip->rtc, MAX8925_RTC_IRQ);
 680         max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
 681         /* mask all interrupts except for TSC */
 682         max8925_reg_write(chip->rtc, MAX8925_ALARM0_CNTL, 0);
 683         max8925_reg_write(chip->rtc, MAX8925_ALARM1_CNTL, 0);
 684         max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ1_MASK, 0xff);
 685         max8925_reg_write(chip->i2c, MAX8925_CHG_IRQ2_MASK, 0xff);
 686         max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ1_MASK, 0xff);
 687         max8925_reg_write(chip->i2c, MAX8925_ON_OFF_IRQ2_MASK, 0xff);
 688         max8925_reg_write(chip->rtc, MAX8925_RTC_IRQ_MASK, 0xff);
 689
 690         mutex_init(&chip->irq_lock);
 691         chip->irq_base = irq_alloc_descs(-1, 0, MAX8925_NR_IRQS, 0);
 692         if (chip->irq_base < 0) {
 693                 dev_err(chip->dev, "Failed to allocate interrupts, ret:%d\n",
 694                         chip->irq_base);
 695                 return -EBUSY;
 696         }
 697
 698         irq_domain_add_legacy(node, MAX8925_NR_IRQS, chip->irq_base, 0,
 699                               &max8925_irq_domain_ops, chip);
 700
 701         /* request irq handler for pmic main irq*/
 702         chip->core_irq = irq;
 703         if (!chip->core_irq)
 704                 return -EBUSY;
 705         ret = request_threaded_irq(irq, NULL, max8925_irq, flags | IRQF_ONESHOT,
 706                                    "max8925", chip);
 707         if (ret) {
 708                 dev_err(chip->dev, "Failed to request core IRQ: %d\n", ret);
 709                 chip->core_irq = 0;
 710                 return -EBUSY;
 711         }
 712
 713         /* request irq handler for pmic tsc irq*/
 714
 715         /* mask TSC interrupt */
 716         max8925_reg_write(chip->adc, MAX8925_TSC_IRQ_MASK, 0x0f);
 717
 718         if (!pdata->tsc_irq) {
 719                 dev_warn(chip->dev, "No interrupt support on TSC IRQ\n");
 720                 return 0;
 721         }
 722         chip->tsc_irq = pdata->tsc_irq;
 723         ret = request_threaded_irq(chip->tsc_irq, NULL, max8925_tsc_irq,
 724                                    flags | IRQF_ONESHOT, "max8925-tsc", chip);
 725         if (ret) {
 726                 dev_err(chip->dev, "Failed to request TSC IRQ: %d\n", ret);
 727                 chip->tsc_irq = 0;
 728         }
 729         return 0;
 730 }
 731
 732 static void init_regulator(struct max8925_chip *chip,
 733                                      struct max8925_platform_data *pdata)
 734 {
 735         int ret;
 736
 737         if (!pdata)
 738                 return;
 739         if (pdata->sd1) {
 740                 reg_devs[0].platform_data = pdata->sd1;
 741                 reg_devs[0].pdata_size = sizeof(struct regulator_init_data);
 742         }
 743         if (pdata->sd2) {
 744                 reg_devs[1].platform_data = pdata->sd2;
 745                 reg_devs[1].pdata_size = sizeof(struct regulator_init_data);
 746         }
 747         if (pdata->sd3) {
 748                 reg_devs[2].platform_data = pdata->sd3;
 749                 reg_devs[2].pdata_size = sizeof(struct regulator_init_data);
 750         }
 751         if (pdata->ldo1) {
 752                 reg_devs[3].platform_data = pdata->ldo1;
 753                 reg_devs[3].pdata_size = sizeof(struct regulator_init_data);
 754         }
 755         if (pdata->ldo2) {
 756                 reg_devs[4].platform_data = pdata->ldo2;
 757                 reg_devs[4].pdata_size = sizeof(struct regulator_init_data);
 758         }
 759         if (pdata->ldo3) {
 760                 reg_devs[5].platform_data = pdata->ldo3;
 761                 reg_devs[5].pdata_size = sizeof(struct regulator_init_data);
 762         }
 763         if (pdata->ldo4) {
 764                 reg_devs[6].platform_data = pdata->ldo4;
 765                 reg_devs[6].pdata_size = sizeof(struct regulator_init_data);
 766         }
 767         if (pdata->ldo5) {
 768                 reg_devs[7].platform_data = pdata->ldo5;
 769                 reg_devs[7].pdata_size = sizeof(struct regulator_init_data);
 770         }
 771         if (pdata->ldo6) {
 772                 reg_devs[8].platform_data = pdata->ldo6;
 773                 reg_devs[8].pdata_size = sizeof(struct regulator_init_data);
 774         }
 775         if (pdata->ldo7) {
 776                 reg_devs[9].platform_data = pdata->ldo7;
 777                 reg_devs[9].pdata_size = sizeof(struct regulator_init_data);
 778         }
 779         if (pdata->ldo8) {
 780                 reg_devs[10].platform_data = pdata->ldo8;
 781                 reg_devs[10].pdata_size = sizeof(struct regulator_init_data);
 782         }
 783         if (pdata->ldo9) {
 784                 reg_devs[11].platform_data = pdata->ldo9;
 785                 reg_devs[11].pdata_size = sizeof(struct regulator_init_data);
 786         }
 787         if (pdata->ldo10) {
 788                 reg_devs[12].platform_data = pdata->ldo10;
 789                 reg_devs[12].pdata_size = sizeof(struct regulator_init_data);
 790         }
 791         if (pdata->ldo11) {
 792                 reg_devs[13].platform_data = pdata->ldo11;
 793                 reg_devs[13].pdata_size = sizeof(struct regulator_init_data);
 794         }
 795         if (pdata->ldo12) {
 796                 reg_devs[14].platform_data = pdata->ldo12;
 797                 reg_devs[14].pdata_size = sizeof(struct regulator_init_data);
 798         }
 799         if (pdata->ldo13) {
 800                 reg_devs[15].platform_data = pdata->ldo13;
 801                 reg_devs[15].pdata_size = sizeof(struct regulator_init_data);
 802         }
 803         if (pdata->ldo14) {
 804                 reg_devs[16].platform_data = pdata->ldo14;
 805                 reg_devs[16].pdata_size = sizeof(struct regulator_init_data);
 806         }
 807         if (pdata->ldo15) {
 808                 reg_devs[17].platform_data = pdata->ldo15;
 809                 reg_devs[17].pdata_size = sizeof(struct regulator_init_data);
 810         }
 811         if (pdata->ldo16) {
 812                 reg_devs[18].platform_data = pdata->ldo16;
 813                 reg_devs[18].pdata_size = sizeof(struct regulator_init_data);
 814         }
 815         if (pdata->ldo17) {
 816                 reg_devs[19].platform_data = pdata->ldo17;
 817                 reg_devs[19].pdata_size = sizeof(struct regulator_init_data);
 818         }
 819         if (pdata->ldo18) {
 820                 reg_devs[20].platform_data = pdata->ldo18;
 821                 reg_devs[20].pdata_size = sizeof(struct regulator_init_data);
 822         }
 823         if (pdata->ldo19) {
 824                 reg_devs[21].platform_data = pdata->ldo19;
 825                 reg_devs[21].pdata_size = sizeof(struct regulator_init_data);
 826         }
 827         if (pdata->ldo20) {
 828                 reg_devs[22].platform_data = pdata->ldo20;
 829                 reg_devs[22].pdata_size = sizeof(struct regulator_init_data);
 830         }
 831         ret = mfd_add_devices(chip->dev, 0, reg_devs, ARRAY_SIZE(reg_devs),
 832                               NULL, 0, NULL);
 833         if (ret < 0) {
 834                 dev_err(chip->dev, "Failed to add regulator subdev\n");
 835                 return;
 836         }
 837 }
 838
 839 int max8925_device_init(struct max8925_chip *chip,
 840                                   struct max8925_platform_data *pdata)
 841 {
 842         int ret;
 843
 844         max8925_irq_init(chip, chip->i2c->irq, pdata);
 845
 846         if (pdata && (pdata->power || pdata->touch)) {
 847                 /* enable ADC to control internal reference */
 848                 max8925_set_bits(chip->i2c, MAX8925_RESET_CNFG, 1, 1);
 849                 /* enable internal reference for ADC */
 850                 max8925_set_bits(chip->adc, MAX8925_TSC_CNFG1, 3, 2);
 851                 /* check for internal reference IRQ */
 852                 do {
 853                         ret = max8925_reg_read(chip->adc, MAX8925_TSC_IRQ);
 854                 } while (ret & MAX8925_NREF_OK);
 855                 /* enaable ADC scheduler, interval is 1 second */
 856                 max8925_set_bits(chip->adc, MAX8925_ADC_SCHED, 3, 2);
 857         }
 858
 859         /* enable Momentary Power Loss */
 860         max8925_set_bits(chip->rtc, MAX8925_MPL_CNTL, 1 << 4, 1 << 4);
 861
 862         ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
 863                               ARRAY_SIZE(rtc_devs),
 864                               NULL, chip->irq_base, NULL);
 865         if (ret < 0) {
 866                 dev_err(chip->dev, "Failed to add rtc subdev\n");
 867                 goto out;
 868         }
 869
 870         ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
 871                               ARRAY_SIZE(onkey_devs),
 872                               NULL, chip->irq_base, NULL);
 873         if (ret < 0) {
 874                 dev_err(chip->dev, "Failed to add onkey subdev\n");
 875                 goto out_dev;
 876         }
 877
 878         init_regulator(chip, pdata);
 879
 880         if (pdata && pdata->backlight) {
 881                 bk_devs[0].platform_data = &pdata->backlight;
 882                 bk_devs[0].pdata_size = sizeof(struct max8925_backlight_pdata);
 883         }
 884         ret = mfd_add_devices(chip->dev, 0, bk_devs, ARRAY_SIZE(bk_devs),
 885                               NULL, 0, NULL);
 886         if (ret < 0) {
 887                 dev_err(chip->dev, "Failed to add backlight subdev\n");
 888                 goto out_dev;
 889         }
 890
 891         ret = mfd_add_devices(chip->dev, 0, &power_devs[0],
 892                               ARRAY_SIZE(power_devs),
 893                               NULL, 0, NULL);
 894         if (ret < 0) {
 895                 dev_err(chip->dev,
 896                         "Failed to add power supply subdev, err = %d\n", ret);
 897                 goto out_dev;
 898         }
 899
 900         if (pdata && pdata->touch) {
 901                 ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
 902                                       ARRAY_SIZE(touch_devs),
 903                                       NULL, chip->tsc_irq, NULL);
 904                 if (ret < 0) {
 905                         dev_err(chip->dev, "Failed to add touch subdev\n");
 906                         goto out_dev;
 907                 }
 908         }
 909
 910         return 0;
 911 out_dev:
 912         mfd_remove_devices(chip->dev);
 913 out:
 914         return ret;
 915 }
 916
 917 void max8925_device_exit(struct max8925_chip *chip)
 918 {
 919         if (chip->core_irq)
 920                 free_irq(chip->core_irq, chip);
 921         if (chip->tsc_irq)
 922                 free_irq(chip->tsc_irq, chip);
 923         mfd_remove_devices(chip->dev);
 924 }
 925
 926
 927 MODULE_DESCRIPTION("PMIC Driver for Maxim MAX8925");
 928 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com");
 929 MODULE_LICENSE("GPL");