drivers/mfd/88pm860x-core.c

   1 /*
   2  * Base driver for Marvell 88PM8607
   3  *
   4  * Copyright (C) 2009 Marvell International Ltd.
   5  *
   6  * Author: Haojian Zhuang <haojian.zhuang@marvell.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/kernel.h>
  14 #include <linux/module.h>
  15 #include <linux/err.h>
  16 #include <linux/i2c.h>
  17 #include <linux/irq.h>
  18 #include <linux/interrupt.h>
  19 #include <linux/irqdomain.h>
  20 #include <linux/of.h>
  21 #include <linux/of_platform.h>
  22 #include <linux/platform_device.h>
  23 #include <linux/regmap.h>
  24 #include <linux/slab.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/mfd/88pm860x.h>
  27 #include <linux/regulator/machine.h>
  28 #include <linux/power/charger-manager.h>
  29
  30 #define INT_STATUS_NUM                  3
  31
  32 static struct resource bk0_resources[] = {
  33         {2, 2, "duty cycle", IORESOURCE_REG, },
  34         {3, 3, "always on",  IORESOURCE_REG, },
  35         {3, 3, "current",    IORESOURCE_REG, },
  36 };
  37 static struct resource bk1_resources[] = {
  38         {4, 4, "duty cycle", IORESOURCE_REG, },
  39         {5, 5, "always on",  IORESOURCE_REG, },
  40         {5, 5, "current",    IORESOURCE_REG, },
  41 };
  42 static struct resource bk2_resources[] = {
  43         {6, 6, "duty cycle", IORESOURCE_REG, },
  44         {7, 7, "always on",  IORESOURCE_REG, },
  45         {5, 5, "current",    IORESOURCE_REG, },
  46 };
  47
  48 static struct resource led0_resources[] = {
  49         /* RGB1 Red LED */
  50         {0xd, 0xd, "control", IORESOURCE_REG, },
  51         {0xc, 0xc, "blink",   IORESOURCE_REG, },
  52 };
  53 static struct resource led1_resources[] = {
  54         /* RGB1 Green LED */
  55         {0xe, 0xe, "control", IORESOURCE_REG, },
  56         {0xc, 0xc, "blink",   IORESOURCE_REG, },
  57 };
  58 static struct resource led2_resources[] = {
  59         /* RGB1 Blue LED */
  60         {0xf, 0xf, "control", IORESOURCE_REG, },
  61         {0xc, 0xc, "blink",   IORESOURCE_REG, },
  62 };
  63 static struct resource led3_resources[] = {
  64         /* RGB2 Red LED */
  65         {0x9, 0x9, "control", IORESOURCE_REG, },
  66         {0x8, 0x8, "blink",   IORESOURCE_REG, },
  67 };
  68 static struct resource led4_resources[] = {
  69         /* RGB2 Green LED */
  70         {0xa, 0xa, "control", IORESOURCE_REG, },
  71         {0x8, 0x8, "blink",   IORESOURCE_REG, },
  72 };
  73 static struct resource led5_resources[] = {
  74         /* RGB2 Blue LED */
  75         {0xb, 0xb, "control", IORESOURCE_REG, },
  76         {0x8, 0x8, "blink",   IORESOURCE_REG, },
  77 };
  78
  79 static struct resource buck1_resources[] = {
  80         {0x24, 0x24, "buck set", IORESOURCE_REG, },
  81 };
  82 static struct resource buck2_resources[] = {
  83         {0x25, 0x25, "buck set", IORESOURCE_REG, },
  84 };
  85 static struct resource buck3_resources[] = {
  86         {0x26, 0x26, "buck set", IORESOURCE_REG, },
  87 };
  88 static struct resource ldo1_resources[] = {
  89         {0x10, 0x10, "ldo set", IORESOURCE_REG, },
  90 };
  91 static struct resource ldo2_resources[] = {
  92         {0x11, 0x11, "ldo set", IORESOURCE_REG, },
  93 };
  94 static struct resource ldo3_resources[] = {
  95         {0x12, 0x12, "ldo set", IORESOURCE_REG, },
  96 };
  97 static struct resource ldo4_resources[] = {
  98         {0x13, 0x13, "ldo set", IORESOURCE_REG, },
  99 };
 100 static struct resource ldo5_resources[] = {
 101         {0x14, 0x14, "ldo set", IORESOURCE_REG, },
 102 };
 103 static struct resource ldo6_resources[] = {
 104         {0x15, 0x15, "ldo set", IORESOURCE_REG, },
 105 };
 106 static struct resource ldo7_resources[] = {
 107         {0x16, 0x16, "ldo set", IORESOURCE_REG, },
 108 };
 109 static struct resource ldo8_resources[] = {
 110         {0x17, 0x17, "ldo set", IORESOURCE_REG, },
 111 };
 112 static struct resource ldo9_resources[] = {
 113         {0x18, 0x18, "ldo set", IORESOURCE_REG, },
 114 };
 115 static struct resource ldo10_resources[] = {
 116         {0x19, 0x19, "ldo set", IORESOURCE_REG, },
 117 };
 118 static struct resource ldo12_resources[] = {
 119         {0x1a, 0x1a, "ldo set", IORESOURCE_REG, },
 120 };
 121 static struct resource ldo_vibrator_resources[] = {
 122         {0x28, 0x28, "ldo set", IORESOURCE_REG, },
 123 };
 124 static struct resource ldo14_resources[] = {
 125         {0x1b, 0x1b, "ldo set", IORESOURCE_REG, },
 126 };
 127
 128 static struct resource touch_resources[] = {
 129         {PM8607_IRQ_PEN, PM8607_IRQ_PEN, "touch", IORESOURCE_IRQ,},
 130 };
 131
 132 static struct resource onkey_resources[] = {
 133         {PM8607_IRQ_ONKEY, PM8607_IRQ_ONKEY, "onkey", IORESOURCE_IRQ,},
 134 };
 135
 136 static struct resource codec_resources[] = {
 137         /* Headset microphone insertion or removal */
 138         {PM8607_IRQ_MICIN,   PM8607_IRQ_MICIN,   "micin",   IORESOURCE_IRQ,},
 139         /* Hook-switch press or release */
 140         {PM8607_IRQ_HOOK,    PM8607_IRQ_HOOK,    "hook",    IORESOURCE_IRQ,},
 141         /* Headset insertion or removal */
 142         {PM8607_IRQ_HEADSET, PM8607_IRQ_HEADSET, "headset", IORESOURCE_IRQ,},
 143         /* Audio short */
 144         {PM8607_IRQ_AUDIO_SHORT, PM8607_IRQ_AUDIO_SHORT, "audio-short",
 145          IORESOURCE_IRQ,},
 146 };
 147
 148 static struct resource battery_resources[] = {
 149         {PM8607_IRQ_CC,  PM8607_IRQ_CC,  "columb counter", IORESOURCE_IRQ,},
 150         {PM8607_IRQ_BAT, PM8607_IRQ_BAT, "battery",        IORESOURCE_IRQ,},
 151 };
 152
 153 static struct resource charger_resources[] = {
 154         {PM8607_IRQ_CHG,  PM8607_IRQ_CHG,  "charger detect",  IORESOURCE_IRQ,},
 155         {PM8607_IRQ_CHG_DONE,  PM8607_IRQ_CHG_DONE,  "charging done",
 156          IORESOURCE_IRQ,},
 157         {PM8607_IRQ_CHG_FAIL,  PM8607_IRQ_CHG_FAIL,  "charging timeout",
 158          IORESOURCE_IRQ,},
 159         {PM8607_IRQ_CHG_FAULT, PM8607_IRQ_CHG_FAULT, "charging fault",
 160          IORESOURCE_IRQ,},
 161         {PM8607_IRQ_GPADC1,    PM8607_IRQ_GPADC1,    "battery temperature",
 162          IORESOURCE_IRQ,},
 163         {PM8607_IRQ_VBAT, PM8607_IRQ_VBAT, "battery voltage", IORESOURCE_IRQ,},
 164         {PM8607_IRQ_VCHG, PM8607_IRQ_VCHG, "vchg voltage",    IORESOURCE_IRQ,},
 165 };
 166
 167 static struct resource rtc_resources[] = {
 168         {PM8607_IRQ_RTC, PM8607_IRQ_RTC, "rtc", IORESOURCE_IRQ,},
 169 };
 170
 171 static struct mfd_cell bk_devs[] = {
 172         {
 173                 .name = "88pm860x-backlight",
 174                 .id = 0,
 175                 .num_resources = ARRAY_SIZE(bk0_resources),
 176                 .resources = bk0_resources,
 177         }, {
 178                 .name = "88pm860x-backlight",
 179                 .id = 1,
 180                 .num_resources = ARRAY_SIZE(bk1_resources),
 181                 .resources = bk1_resources,
 182         }, {
 183                 .name = "88pm860x-backlight",
 184                 .id = 2,
 185                 .num_resources = ARRAY_SIZE(bk2_resources),
 186                 .resources = bk2_resources,
 187         },
 188 };
 189
 190 static struct mfd_cell led_devs[] = {
 191         {
 192                 .name = "88pm860x-led",
 193                 .id = 0,
 194                 .num_resources = ARRAY_SIZE(led0_resources),
 195                 .resources = led0_resources,
 196         }, {
 197                 .name = "88pm860x-led",
 198                 .id = 1,
 199                 .num_resources = ARRAY_SIZE(led1_resources),
 200                 .resources = led1_resources,
 201         }, {
 202                 .name = "88pm860x-led",
 203                 .id = 2,
 204                 .num_resources = ARRAY_SIZE(led2_resources),
 205                 .resources = led2_resources,
 206         }, {
 207                 .name = "88pm860x-led",
 208                 .id = 3,
 209                 .num_resources = ARRAY_SIZE(led3_resources),
 210                 .resources = led3_resources,
 211         }, {
 212                 .name = "88pm860x-led",
 213                 .id = 4,
 214                 .num_resources = ARRAY_SIZE(led4_resources),
 215                 .resources = led4_resources,
 216         }, {
 217                 .name = "88pm860x-led",
 218                 .id = 5,
 219                 .num_resources = ARRAY_SIZE(led5_resources),
 220                 .resources = led5_resources,
 221         },
 222 };
 223
 224 static struct mfd_cell reg_devs[] = {
 225         {
 226                 .name = "88pm860x-regulator",
 227                 .id = 0,
 228                 .num_resources = ARRAY_SIZE(buck1_resources),
 229                 .resources = buck1_resources,
 230         }, {
 231                 .name = "88pm860x-regulator",
 232                 .id = 1,
 233                 .num_resources = ARRAY_SIZE(buck2_resources),
 234                 .resources = buck2_resources,
 235         }, {
 236                 .name = "88pm860x-regulator",
 237                 .id = 2,
 238                 .num_resources = ARRAY_SIZE(buck3_resources),
 239                 .resources = buck3_resources,
 240         }, {
 241                 .name = "88pm860x-regulator",
 242                 .id = 3,
 243                 .num_resources = ARRAY_SIZE(ldo1_resources),
 244                 .resources = ldo1_resources,
 245         }, {
 246                 .name = "88pm860x-regulator",
 247                 .id = 4,
 248                 .num_resources = ARRAY_SIZE(ldo2_resources),
 249                 .resources = ldo2_resources,
 250         }, {
 251                 .name = "88pm860x-regulator",
 252                 .id = 5,
 253                 .num_resources = ARRAY_SIZE(ldo3_resources),
 254                 .resources = ldo3_resources,
 255         }, {
 256                 .name = "88pm860x-regulator",
 257                 .id = 6,
 258                 .num_resources = ARRAY_SIZE(ldo4_resources),
 259                 .resources = ldo4_resources,
 260         }, {
 261                 .name = "88pm860x-regulator",
 262                 .id = 7,
 263                 .num_resources = ARRAY_SIZE(ldo5_resources),
 264                 .resources = ldo5_resources,
 265         }, {
 266                 .name = "88pm860x-regulator",
 267                 .id = 8,
 268                 .num_resources = ARRAY_SIZE(ldo6_resources),
 269                 .resources = ldo6_resources,
 270         }, {
 271                 .name = "88pm860x-regulator",
 272                 .id = 9,
 273                 .num_resources = ARRAY_SIZE(ldo7_resources),
 274                 .resources = ldo7_resources,
 275         }, {
 276                 .name = "88pm860x-regulator",
 277                 .id = 10,
 278                 .num_resources = ARRAY_SIZE(ldo8_resources),
 279                 .resources = ldo8_resources,
 280         }, {
 281                 .name = "88pm860x-regulator",
 282                 .id = 11,
 283                 .num_resources = ARRAY_SIZE(ldo9_resources),
 284                 .resources = ldo9_resources,
 285         }, {
 286                 .name = "88pm860x-regulator",
 287                 .id = 12,
 288                 .num_resources = ARRAY_SIZE(ldo10_resources),
 289                 .resources = ldo10_resources,
 290         }, {
 291                 .name = "88pm860x-regulator",
 292                 .id = 13,
 293                 .num_resources = ARRAY_SIZE(ldo12_resources),
 294                 .resources = ldo12_resources,
 295         }, {
 296                 .name = "88pm860x-regulator",
 297                 .id = 14,
 298                 .num_resources = ARRAY_SIZE(ldo_vibrator_resources),
 299                 .resources = ldo_vibrator_resources,
 300         }, {
 301                 .name = "88pm860x-regulator",
 302                 .id = 15,
 303                 .num_resources = ARRAY_SIZE(ldo14_resources),
 304                 .resources = ldo14_resources,
 305         },
 306 };
 307
 308 static struct mfd_cell touch_devs[] = {
 309         {"88pm860x-touch", -1,},
 310 };
 311
 312 static struct mfd_cell onkey_devs[] = {
 313         {"88pm860x-onkey", -1,},
 314 };
 315
 316 static struct mfd_cell codec_devs[] = {
 317         {"88pm860x-codec", -1,},
 318 };
 319
 320 static struct regulator_consumer_supply preg_supply[] = {
 321         REGULATOR_SUPPLY("preg", "charger-manager"),
 322 };
 323
 324 static struct regulator_init_data preg_init_data = {
 325         .num_consumer_supplies  = ARRAY_SIZE(preg_supply),
 326         .consumer_supplies      = &preg_supply[0],
 327 };
 328
 329 static struct charger_regulator chg_desc_regulator_data[] = {
 330         { .regulator_name = "preg", },
 331 };
 332
 333 static struct mfd_cell power_devs[] = {
 334         {"88pm860x-battery", -1,},
 335         {"88pm860x-charger", -1,},
 336         {"88pm860x-preg",    -1,},
 337         {"charger-manager", -1,},
 338 };
 339
 340 static struct mfd_cell rtc_devs[] = {
 341         {"88pm860x-rtc", -1,},
 342 };
 343
 344
 345 struct pm860x_irq_data {
 346         int     reg;
 347         int     mask_reg;
 348         int     enable;         /* enable or not */
 349         int     offs;           /* bit offset in mask register */
 350 };
 351
 352 static struct pm860x_irq_data pm860x_irqs[] = {
 353         [PM8607_IRQ_ONKEY] = {
 354                 .reg            = PM8607_INT_STATUS1,
 355                 .mask_reg       = PM8607_INT_MASK_1,
 356                 .offs           = 1 << 0,
 357         },
 358         [PM8607_IRQ_EXTON] = {
 359                 .reg            = PM8607_INT_STATUS1,
 360                 .mask_reg       = PM8607_INT_MASK_1,
 361                 .offs           = 1 << 1,
 362         },
 363         [PM8607_IRQ_CHG] = {
 364                 .reg            = PM8607_INT_STATUS1,
 365                 .mask_reg       = PM8607_INT_MASK_1,
 366                 .offs           = 1 << 2,
 367         },
 368         [PM8607_IRQ_BAT] = {
 369                 .reg            = PM8607_INT_STATUS1,
 370                 .mask_reg       = PM8607_INT_MASK_1,
 371                 .offs           = 1 << 3,
 372         },
 373         [PM8607_IRQ_RTC] = {
 374                 .reg            = PM8607_INT_STATUS1,
 375                 .mask_reg       = PM8607_INT_MASK_1,
 376                 .offs           = 1 << 4,
 377         },
 378         [PM8607_IRQ_CC] = {
 379                 .reg            = PM8607_INT_STATUS1,
 380                 .mask_reg       = PM8607_INT_MASK_1,
 381                 .offs           = 1 << 5,
 382         },
 383         [PM8607_IRQ_VBAT] = {
 384                 .reg            = PM8607_INT_STATUS2,
 385                 .mask_reg       = PM8607_INT_MASK_2,
 386                 .offs           = 1 << 0,
 387         },
 388         [PM8607_IRQ_VCHG] = {
 389                 .reg            = PM8607_INT_STATUS2,
 390                 .mask_reg       = PM8607_INT_MASK_2,
 391                 .offs           = 1 << 1,
 392         },
 393         [PM8607_IRQ_VSYS] = {
 394                 .reg            = PM8607_INT_STATUS2,
 395                 .mask_reg       = PM8607_INT_MASK_2,
 396                 .offs           = 1 << 2,
 397         },
 398         [PM8607_IRQ_TINT] = {
 399                 .reg            = PM8607_INT_STATUS2,
 400                 .mask_reg       = PM8607_INT_MASK_2,
 401                 .offs           = 1 << 3,
 402         },
 403         [PM8607_IRQ_GPADC0] = {
 404                 .reg            = PM8607_INT_STATUS2,
 405                 .mask_reg       = PM8607_INT_MASK_2,
 406                 .offs           = 1 << 4,
 407         },
 408         [PM8607_IRQ_GPADC1] = {
 409                 .reg            = PM8607_INT_STATUS2,
 410                 .mask_reg       = PM8607_INT_MASK_2,
 411                 .offs           = 1 << 5,
 412         },
 413         [PM8607_IRQ_GPADC2] = {
 414                 .reg            = PM8607_INT_STATUS2,
 415                 .mask_reg       = PM8607_INT_MASK_2,
 416                 .offs           = 1 << 6,
 417         },
 418         [PM8607_IRQ_GPADC3] = {
 419                 .reg            = PM8607_INT_STATUS2,
 420                 .mask_reg       = PM8607_INT_MASK_2,
 421                 .offs           = 1 << 7,
 422         },
 423         [PM8607_IRQ_AUDIO_SHORT] = {
 424                 .reg            = PM8607_INT_STATUS3,
 425                 .mask_reg       = PM8607_INT_MASK_3,
 426                 .offs           = 1 << 0,
 427         },
 428         [PM8607_IRQ_PEN] = {
 429                 .reg            = PM8607_INT_STATUS3,
 430                 .mask_reg       = PM8607_INT_MASK_3,
 431                 .offs           = 1 << 1,
 432         },
 433         [PM8607_IRQ_HEADSET] = {
 434                 .reg            = PM8607_INT_STATUS3,
 435                 .mask_reg       = PM8607_INT_MASK_3,
 436                 .offs           = 1 << 2,
 437         },
 438         [PM8607_IRQ_HOOK] = {
 439                 .reg            = PM8607_INT_STATUS3,
 440                 .mask_reg       = PM8607_INT_MASK_3,
 441                 .offs           = 1 << 3,
 442         },
 443         [PM8607_IRQ_MICIN] = {
 444                 .reg            = PM8607_INT_STATUS3,
 445                 .mask_reg       = PM8607_INT_MASK_3,
 446                 .offs           = 1 << 4,
 447         },
 448         [PM8607_IRQ_CHG_FAIL] = {
 449                 .reg            = PM8607_INT_STATUS3,
 450                 .mask_reg       = PM8607_INT_MASK_3,
 451                 .offs           = 1 << 5,
 452         },
 453         [PM8607_IRQ_CHG_DONE] = {
 454                 .reg            = PM8607_INT_STATUS3,
 455                 .mask_reg       = PM8607_INT_MASK_3,
 456                 .offs           = 1 << 6,
 457         },
 458         [PM8607_IRQ_CHG_FAULT] = {
 459                 .reg            = PM8607_INT_STATUS3,
 460                 .mask_reg       = PM8607_INT_MASK_3,
 461                 .offs           = 1 << 7,
 462         },
 463 };
 464
 465 static irqreturn_t pm860x_irq(int irq, void *data)
 466 {
 467         struct pm860x_chip *chip = data;
 468         struct pm860x_irq_data *irq_data;
 469         struct i2c_client *i2c;
 470         int read_reg = -1, value = 0;
 471         int i;
 472
 473         i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 474         for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
 475                 irq_data = &pm860x_irqs[i];
 476                 if (read_reg != irq_data->reg) {
 477                         read_reg = irq_data->reg;
 478                         value = pm860x_reg_read(i2c, irq_data->reg);
 479                 }
 480                 if (value & irq_data->enable)
 481                         handle_nested_irq(chip->irq_base + i);
 482         }
 483         return IRQ_HANDLED;
 484 }
 485
 486 static void pm860x_irq_lock(struct irq_data *data)
 487 {
 488         struct pm860x_chip *chip = irq_data_get_irq_chip_data(data);
 489
 490         mutex_lock(&chip->irq_lock);
 491 }
 492
 493 static void pm860x_irq_sync_unlock(struct irq_data *data)
 494 {
 495         struct pm860x_chip *chip = irq_data_get_irq_chip_data(data);
 496         struct pm860x_irq_data *irq_data;
 497         struct i2c_client *i2c;
 498         static unsigned char cached[3] = {0x0, 0x0, 0x0};
 499         unsigned char mask[3];
 500         int i;
 501
 502         i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
 503         /* Load cached value. In initial, all IRQs are masked */
 504         for (i = 0; i < 3; i++)
 505                 mask[i] = cached[i];
 506         for (i = 0; i < ARRAY_SIZE(pm860x_irqs); i++) {
 507                 irq_data = &pm860x_irqs[i];
 508                 switch (irq_data->mask_reg) {
 509                 case PM8607_INT_MASK_1:
 510                         mask[0] &= ~irq_data->offs;
 511                         mask[0] |= irq_data->enable;
 512                         break;
 513                 case PM8607_INT_MASK_2:
 514                         mask[1] &= ~irq_data->offs;
 515                         mask[1] |= irq_data->enable;
 516                         break;
 517                 case PM8607_INT_MASK_3:
 518                         mask[2] &= ~irq_data->offs;
 519                         mask[2] |= irq_data->enable;
 520                         break;
 521                 default:
 522                         dev_err(chip->dev, "wrong IRQ\n");
 523                         break;
 524                 }
 525         }
 526         /* update mask into registers */
 527         for (i = 0; i < 3; i++) {
 528                 if (mask[i] != cached[i]) {
 529                         cached[i] = mask[i];
 530                         pm860x_reg_write(i2c, PM8607_INT_MASK_1 + i, mask[i]);
 531                 }
 532         }
 533
 534         mutex_unlock(&chip->irq_lock);
 535 }
 536
 537 static void pm860x_irq_enable(struct irq_data *data)
 538 {
 539         pm860x_irqs[data->hwirq].enable = pm860x_irqs[data->hwirq].offs;
 540 }
 541
 542 static void pm860x_irq_disable(struct irq_data *data)
 543 {
 544         pm860x_irqs[data->hwirq].enable = 0;
 545 }
 546
 547 static struct irq_chip pm860x_irq_chip = {
 548         .name           = "88pm860x",
 549         .irq_bus_lock   = pm860x_irq_lock,
 550         .irq_bus_sync_unlock = pm860x_irq_sync_unlock,
 551         .irq_enable     = pm860x_irq_enable,
 552         .irq_disable    = pm860x_irq_disable,
 553 };
 554
 555 static int pm860x_irq_domain_map(struct irq_domain *d, unsigned int virq,
 556                                  irq_hw_number_t hw)
 557 {
 558         irq_set_chip_data(virq, d->host_data);
 559         irq_set_chip_and_handler(virq, &pm860x_irq_chip, handle_edge_irq);
 560         irq_set_nested_thread(virq, 1);
 561 #ifdef CONFIG_ARM
 562         set_irq_flags(virq, IRQF_VALID);
 563 #else
 564         irq_set_noprobe(virq);
 565 #endif
 566         return 0;
 567 }
 568
 569 static const struct irq_domain_ops pm860x_irq_domain_ops = {
 570         .map    = pm860x_irq_domain_map,
 571         .xlate  = irq_domain_xlate_onetwocell,
 572 };
 573
 574 static int device_irq_init(struct pm860x_chip *chip,
 575                                      struct pm860x_platform_data *pdata)
 576 {
 577         struct i2c_client *i2c = (chip->id == CHIP_PM8607) ?
 578                 chip->client : chip->companion;
 579         unsigned char status_buf[INT_STATUS_NUM];
 580         unsigned long flags = IRQF_TRIGGER_FALLING | IRQF_ONESHOT;
 581         int data, mask, ret = -EINVAL;
 582         int nr_irqs, irq_base = -1;
 583         struct device_node *node = i2c->dev.of_node;
 584
 585         mask = PM8607_B0_MISC1_INV_INT | PM8607_B0_MISC1_INT_CLEAR
 586                 | PM8607_B0_MISC1_INT_MASK;
 587         data = 0;
 588         chip->irq_mode = 0;
 589         if (pdata && pdata->irq_mode) {
 590                 /*
 591                  * irq_mode defines the way of clearing interrupt. If it's 1,
 592                  * clear IRQ by write. Otherwise, clear it by read.
 593                  * This control bit is valid from 88PM8607 B0 steping.
 594                  */
 595                 data |= PM8607_B0_MISC1_INT_CLEAR;
 596                 chip->irq_mode = 1;
 597         }
 598         ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, mask, data);
 599         if (ret < 0)
 600                 goto out;
 601
 602         /* mask all IRQs */
 603         memset(status_buf, 0, INT_STATUS_NUM);
 604         ret = pm860x_bulk_write(i2c, PM8607_INT_MASK_1,
 605                                 INT_STATUS_NUM, status_buf);
 606         if (ret < 0)
 607                 goto out;
 608
 609         if (chip->irq_mode) {
 610                 /* clear interrupt status by write */
 611                 memset(status_buf, 0xFF, INT_STATUS_NUM);
 612                 ret = pm860x_bulk_write(i2c, PM8607_INT_STATUS1,
 613                                         INT_STATUS_NUM, status_buf);
 614         } else {
 615                 /* clear interrupt status by read */
 616                 ret = pm860x_bulk_read(i2c, PM8607_INT_STATUS1,
 617                                         INT_STATUS_NUM, status_buf);
 618         }
 619         if (ret < 0)
 620                 goto out;
 621
 622         mutex_init(&chip->irq_lock);
 623
 624         if (pdata && pdata->irq_base)
 625                 irq_base = pdata->irq_base;
 626         nr_irqs = ARRAY_SIZE(pm860x_irqs);
 627         chip->irq_base = irq_alloc_descs(irq_base, 0, nr_irqs, 0);
 628         if (chip->irq_base < 0) {
 629                 dev_err(&i2c->dev, "Failed to allocate interrupts, ret:%d\n",
 630                         chip->irq_base);
 631                 ret = -EBUSY;
 632                 goto out;
 633         }
 634         irq_domain_add_legacy(node, nr_irqs, chip->irq_base, 0,
 635                               &pm860x_irq_domain_ops, chip);
 636         chip->core_irq = i2c->irq;
 637         if (!chip->core_irq)
 638                 goto out;
 639
 640         ret = request_threaded_irq(chip->core_irq, NULL, pm860x_irq,
 641                                    flags | IRQF_ONESHOT, "88pm860x", chip);
 642         if (ret) {
 643                 dev_err(chip->dev, "Failed to request IRQ: %d\n", ret);
 644                 chip->core_irq = 0;
 645         }
 646
 647         return 0;
 648 out:
 649         chip->core_irq = 0;
 650         return ret;
 651 }
 652
 653 static void device_irq_exit(struct pm860x_chip *chip)
 654 {
 655         if (chip->core_irq)
 656                 free_irq(chip->core_irq, chip);
 657 }
 658
 659 int pm8606_osc_enable(struct pm860x_chip *chip, unsigned short client)
 660 {
 661         int ret = -EIO;
 662         struct i2c_client *i2c = (chip->id == CHIP_PM8606) ?
 663                 chip->client : chip->companion;
 664
 665         dev_dbg(chip->dev, "%s(B): client=0x%x\n", __func__, client);
 666         dev_dbg(chip->dev, "%s(B): vote=0x%x status=%d\n",
 667                         __func__, chip->osc_vote,
 668                         chip->osc_status);
 669
 670         mutex_lock(&chip->osc_lock);
 671         /* Update voting status */
 672         chip->osc_vote |= client;
 673         /* If reference group is off - turn on*/
 674         if (chip->osc_status != PM8606_REF_GP_OSC_ON) {
 675                 chip->osc_status = PM8606_REF_GP_OSC_UNKNOWN;
 676                 /* Enable Reference group Vsys */
 677                 if (pm860x_set_bits(i2c, PM8606_VSYS,
 678                                 PM8606_VSYS_EN, PM8606_VSYS_EN))
 679                         goto out;
 680
 681                 /*Enable Internal Oscillator */
 682                 if (pm860x_set_bits(i2c, PM8606_MISC,
 683                                 PM8606_MISC_OSC_EN, PM8606_MISC_OSC_EN))
 684                         goto out;
 685                 /* Update status (only if writes succeed) */
 686                 chip->osc_status = PM8606_REF_GP_OSC_ON;
 687         }
 688         mutex_unlock(&chip->osc_lock);
 689
 690         dev_dbg(chip->dev, "%s(A): vote=0x%x status=%d ret=%d\n",
 691                         __func__, chip->osc_vote,
 692                         chip->osc_status, ret);
 693         return 0;
 694 out:
 695         mutex_unlock(&chip->osc_lock);
 696         return ret;
 697 }
 698 EXPORT_SYMBOL(pm8606_osc_enable);
 699
 700 int pm8606_osc_disable(struct pm860x_chip *chip, unsigned short client)
 701 {
 702         int ret = -EIO;
 703         struct i2c_client *i2c = (chip->id == CHIP_PM8606) ?
 704                 chip->client : chip->companion;
 705
 706         dev_dbg(chip->dev, "%s(B): client=0x%x\n", __func__, client);
 707         dev_dbg(chip->dev, "%s(B): vote=0x%x status=%d\n",
 708                         __func__, chip->osc_vote,
 709                         chip->osc_status);
 710
 711         mutex_lock(&chip->osc_lock);
 712         /*Update voting status */
 713         chip->osc_vote &= ~(client);
 714         /* If reference group is off and this is the last client to release
 715          * - turn off */
 716         if ((chip->osc_status != PM8606_REF_GP_OSC_OFF) &&
 717                         (chip->osc_vote == REF_GP_NO_CLIENTS)) {
 718                 chip->osc_status = PM8606_REF_GP_OSC_UNKNOWN;
 719                 /* Disable Reference group Vsys */
 720                 if (pm860x_set_bits(i2c, PM8606_VSYS, PM8606_VSYS_EN, 0))
 721                         goto out;
 722                 /* Disable Internal Oscillator */
 723                 if (pm860x_set_bits(i2c, PM8606_MISC, PM8606_MISC_OSC_EN, 0))
 724                         goto out;
 725                 chip->osc_status = PM8606_REF_GP_OSC_OFF;
 726         }
 727         mutex_unlock(&chip->osc_lock);
 728
 729         dev_dbg(chip->dev, "%s(A): vote=0x%x status=%d ret=%d\n",
 730                         __func__, chip->osc_vote,
 731                         chip->osc_status, ret);
 732         return 0;
 733 out:
 734         mutex_unlock(&chip->osc_lock);
 735         return ret;
 736 }
 737 EXPORT_SYMBOL(pm8606_osc_disable);
 738
 739 static void device_osc_init(struct i2c_client *i2c)
 740 {
 741         struct pm860x_chip *chip = i2c_get_clientdata(i2c);
 742
 743         mutex_init(&chip->osc_lock);
 744         /* init portofino reference group voting and status */
 745         /* Disable Reference group Vsys */
 746         pm860x_set_bits(i2c, PM8606_VSYS, PM8606_VSYS_EN, 0);
 747         /* Disable Internal Oscillator */
 748         pm860x_set_bits(i2c, PM8606_MISC, PM8606_MISC_OSC_EN, 0);
 749
 750         chip->osc_vote = REF_GP_NO_CLIENTS;
 751         chip->osc_status = PM8606_REF_GP_OSC_OFF;
 752 }
 753
 754 static void device_bk_init(struct pm860x_chip *chip,
 755                                      struct pm860x_platform_data *pdata)
 756 {
 757         int ret, i;
 758
 759         if (pdata && pdata->backlight) {
 760                 if (pdata->num_backlights > ARRAY_SIZE(bk_devs))
 761                         pdata->num_backlights = ARRAY_SIZE(bk_devs);
 762                 for (i = 0; i < pdata->num_backlights; i++) {
 763                         bk_devs[i].platform_data = &pdata->backlight[i];
 764                         bk_devs[i].pdata_size =
 765                                 sizeof(struct pm860x_backlight_pdata);
 766                 }
 767         }
 768         ret = mfd_add_devices(chip->dev, 0, bk_devs,
 769                               ARRAY_SIZE(bk_devs), NULL, 0, NULL);
 770         if (ret < 0)
 771                 dev_err(chip->dev, "Failed to add backlight subdev\n");
 772 }
 773
 774 static void device_led_init(struct pm860x_chip *chip,
 775                                       struct pm860x_platform_data *pdata)
 776 {
 777         int ret, i;
 778
 779         if (pdata && pdata->led) {
 780                 if (pdata->num_leds > ARRAY_SIZE(led_devs))
 781                         pdata->num_leds = ARRAY_SIZE(led_devs);
 782                 for (i = 0; i < pdata->num_leds; i++) {
 783                         led_devs[i].platform_data = &pdata->led[i];
 784                         led_devs[i].pdata_size =
 785                                 sizeof(struct pm860x_led_pdata);
 786                 }
 787         }
 788         ret = mfd_add_devices(chip->dev, 0, led_devs,
 789                               ARRAY_SIZE(led_devs), NULL, 0, NULL);
 790         if (ret < 0) {
 791                 dev_err(chip->dev, "Failed to add led subdev\n");
 792                 return;
 793         }
 794 }
 795
 796 static void device_regulator_init(struct pm860x_chip *chip,
 797                                             struct pm860x_platform_data *pdata)
 798 {
 799         int ret;
 800
 801         if (pdata == NULL)
 802                 return;
 803         if (pdata->buck1) {
 804                 reg_devs[0].platform_data = pdata->buck1;
 805                 reg_devs[0].pdata_size = sizeof(struct regulator_init_data);
 806         }
 807         if (pdata->buck2) {
 808                 reg_devs[1].platform_data = pdata->buck2;
 809                 reg_devs[1].pdata_size = sizeof(struct regulator_init_data);
 810         }
 811         if (pdata->buck3) {
 812                 reg_devs[2].platform_data = pdata->buck3;
 813                 reg_devs[2].pdata_size = sizeof(struct regulator_init_data);
 814         }
 815         if (pdata->ldo1) {
 816                 reg_devs[3].platform_data = pdata->ldo1;
 817                 reg_devs[3].pdata_size = sizeof(struct regulator_init_data);
 818         }
 819         if (pdata->ldo2) {
 820                 reg_devs[4].platform_data = pdata->ldo2;
 821                 reg_devs[4].pdata_size = sizeof(struct regulator_init_data);
 822         }
 823         if (pdata->ldo3) {
 824                 reg_devs[5].platform_data = pdata->ldo3;
 825                 reg_devs[5].pdata_size = sizeof(struct regulator_init_data);
 826         }
 827         if (pdata->ldo4) {
 828                 reg_devs[6].platform_data = pdata->ldo4;
 829                 reg_devs[6].pdata_size = sizeof(struct regulator_init_data);
 830         }
 831         if (pdata->ldo5) {
 832                 reg_devs[7].platform_data = pdata->ldo5;
 833                 reg_devs[7].pdata_size = sizeof(struct regulator_init_data);
 834         }
 835         if (pdata->ldo6) {
 836                 reg_devs[8].platform_data = pdata->ldo6;
 837                 reg_devs[8].pdata_size = sizeof(struct regulator_init_data);
 838         }
 839         if (pdata->ldo7) {
 840                 reg_devs[9].platform_data = pdata->ldo7;
 841                 reg_devs[9].pdata_size = sizeof(struct regulator_init_data);
 842         }
 843         if (pdata->ldo8) {
 844                 reg_devs[10].platform_data = pdata->ldo8;
 845                 reg_devs[10].pdata_size = sizeof(struct regulator_init_data);
 846         }
 847         if (pdata->ldo9) {
 848                 reg_devs[11].platform_data = pdata->ldo9;
 849                 reg_devs[11].pdata_size = sizeof(struct regulator_init_data);
 850         }
 851         if (pdata->ldo10) {
 852                 reg_devs[12].platform_data = pdata->ldo10;
 853                 reg_devs[12].pdata_size = sizeof(struct regulator_init_data);
 854         }
 855         if (pdata->ldo12) {
 856                 reg_devs[13].platform_data = pdata->ldo12;
 857                 reg_devs[13].pdata_size = sizeof(struct regulator_init_data);
 858         }
 859         if (pdata->ldo_vibrator) {
 860                 reg_devs[14].platform_data = pdata->ldo_vibrator;
 861                 reg_devs[14].pdata_size = sizeof(struct regulator_init_data);
 862         }
 863         if (pdata->ldo14) {
 864                 reg_devs[15].platform_data = pdata->ldo14;
 865                 reg_devs[15].pdata_size = sizeof(struct regulator_init_data);
 866         }
 867         ret = mfd_add_devices(chip->dev, 0, reg_devs,
 868                               ARRAY_SIZE(reg_devs), NULL, 0, NULL);
 869         if (ret < 0) {
 870                 dev_err(chip->dev, "Failed to add regulator subdev\n");
 871                 return;
 872         }
 873 }
 874
 875 static void device_rtc_init(struct pm860x_chip *chip,
 876                                       struct pm860x_platform_data *pdata)
 877 {
 878         int ret;
 879
 880         if (!pdata)
 881                 return;
 882
 883         rtc_devs[0].platform_data = pdata->rtc;
 884         rtc_devs[0].pdata_size = sizeof(struct pm860x_rtc_pdata);
 885         rtc_devs[0].num_resources = ARRAY_SIZE(rtc_resources);
 886         rtc_devs[0].resources = &rtc_resources[0];
 887         ret = mfd_add_devices(chip->dev, 0, &rtc_devs[0],
 888                               ARRAY_SIZE(rtc_devs), &rtc_resources[0],
 889                               chip->irq_base, NULL);
 890         if (ret < 0)
 891                 dev_err(chip->dev, "Failed to add rtc subdev\n");
 892 }
 893
 894 static void device_touch_init(struct pm860x_chip *chip,
 895                                         struct pm860x_platform_data *pdata)
 896 {
 897         int ret;
 898
 899         if (pdata == NULL)
 900                 return;
 901
 902         touch_devs[0].platform_data = pdata->touch;
 903         touch_devs[0].pdata_size = sizeof(struct pm860x_touch_pdata);
 904         touch_devs[0].num_resources = ARRAY_SIZE(touch_resources);
 905         touch_devs[0].resources = &touch_resources[0];
 906         ret = mfd_add_devices(chip->dev, 0, &touch_devs[0],
 907                               ARRAY_SIZE(touch_devs), &touch_resources[0],
 908                               chip->irq_base, NULL);
 909         if (ret < 0)
 910                 dev_err(chip->dev, "Failed to add touch subdev\n");
 911 }
 912
 913 static void device_power_init(struct pm860x_chip *chip,
 914                                         struct pm860x_platform_data *pdata)
 915 {
 916         int ret;
 917
 918         if (pdata == NULL)
 919                 return;
 920
 921         power_devs[0].platform_data = pdata->power;
 922         power_devs[0].pdata_size = sizeof(struct pm860x_power_pdata);
 923         power_devs[0].num_resources = ARRAY_SIZE(battery_resources);
 924         power_devs[0].resources = &battery_resources[0],
 925         ret = mfd_add_devices(chip->dev, 0, &power_devs[0], 1,
 926                               &battery_resources[0], chip->irq_base, NULL);
 927         if (ret < 0)
 928                 dev_err(chip->dev, "Failed to add battery subdev\n");
 929
 930         power_devs[1].platform_data = pdata->power;
 931         power_devs[1].pdata_size = sizeof(struct pm860x_power_pdata);
 932         power_devs[1].num_resources = ARRAY_SIZE(charger_resources);
 933         power_devs[1].resources = &charger_resources[0],
 934         ret = mfd_add_devices(chip->dev, 0, &power_devs[1], 1,
 935                               &charger_resources[0], chip->irq_base, NULL);
 936         if (ret < 0)
 937                 dev_err(chip->dev, "Failed to add charger subdev\n");
 938
 939         power_devs[2].platform_data = &preg_init_data;
 940         power_devs[2].pdata_size = sizeof(struct regulator_init_data);
 941         ret = mfd_add_devices(chip->dev, 0, &power_devs[2], 1,
 942                               NULL, chip->irq_base, NULL);
 943         if (ret < 0)
 944                 dev_err(chip->dev, "Failed to add preg subdev\n");
 945
 946         if (pdata->chg_desc) {
 947                 pdata->chg_desc->charger_regulators =
 948                         &chg_desc_regulator_data[0];
 949                 pdata->chg_desc->num_charger_regulators =
 950                         ARRAY_SIZE(chg_desc_regulator_data),
 951                 power_devs[3].platform_data = pdata->chg_desc;
 952                 power_devs[3].pdata_size = sizeof(*pdata->chg_desc);
 953                 ret = mfd_add_devices(chip->dev, 0, &power_devs[3], 1,
 954                                       NULL, chip->irq_base, NULL);
 955                 if (ret < 0)
 956                         dev_err(chip->dev, "Failed to add chg-manager subdev\n");
 957         }
 958 }
 959
 960 static void device_onkey_init(struct pm860x_chip *chip,
 961                                         struct pm860x_platform_data *pdata)
 962 {
 963         int ret;
 964
 965         onkey_devs[0].num_resources = ARRAY_SIZE(onkey_resources);
 966         onkey_devs[0].resources = &onkey_resources[0],
 967         ret = mfd_add_devices(chip->dev, 0, &onkey_devs[0],
 968                               ARRAY_SIZE(onkey_devs), &onkey_resources[0],
 969                               chip->irq_base, NULL);
 970         if (ret < 0)
 971                 dev_err(chip->dev, "Failed to add onkey subdev\n");
 972 }
 973
 974 static void device_codec_init(struct pm860x_chip *chip,
 975                                         struct pm860x_platform_data *pdata)
 976 {
 977         int ret;
 978
 979         codec_devs[0].num_resources = ARRAY_SIZE(codec_resources);
 980         codec_devs[0].resources = &codec_resources[0],
 981         ret = mfd_add_devices(chip->dev, 0, &codec_devs[0],
 982                               ARRAY_SIZE(codec_devs), &codec_resources[0], 0,
 983                               NULL);
 984         if (ret < 0)
 985                 dev_err(chip->dev, "Failed to add codec subdev\n");
 986 }
 987
 988 static void device_8607_init(struct pm860x_chip *chip,
 989                                        struct i2c_client *i2c,
 990                                        struct pm860x_platform_data *pdata)
 991 {
 992         int data, ret;
 993
 994         ret = pm860x_reg_read(i2c, PM8607_CHIP_ID);
 995         if (ret < 0) {
 996                 dev_err(chip->dev, "Failed to read CHIP ID: %d\n", ret);
 997                 goto out;
 998         }
 999         switch (ret & PM8607_VERSION_MASK) {
1000         case 0x40:
1001         case 0x50:
1002                 dev_info(chip->dev, "Marvell 88PM8607 (ID: %02x) detected\n",
1003                          ret);
1004                 break;
1005         default:
1006                 dev_err(chip->dev,
1007                         "Failed to detect Marvell 88PM8607. Chip ID: %02x\n",
1008                         ret);
1009                 goto out;
1010         }
1011
1012         ret = pm860x_reg_read(i2c, PM8607_BUCK3);
1013         if (ret < 0) {
1014                 dev_err(chip->dev, "Failed to read BUCK3 register: %d\n", ret);
1015                 goto out;
1016         }
1017         if (ret & PM8607_BUCK3_DOUBLE)
1018                 chip->buck3_double = 1;
1019
1020         ret = pm860x_reg_read(i2c, PM8607_B0_MISC1);
1021         if (ret < 0) {
1022                 dev_err(chip->dev, "Failed to read MISC1 register: %d\n", ret);
1023                 goto out;
1024         }
1025
1026         if (pdata && (pdata->i2c_port == PI2C_PORT))
1027                 data = PM8607_B0_MISC1_PI2C;
1028         else
1029                 data = 0;
1030         ret = pm860x_set_bits(i2c, PM8607_B0_MISC1, PM8607_B0_MISC1_PI2C, data);
1031         if (ret < 0) {
1032                 dev_err(chip->dev, "Failed to access MISC1:%d\n", ret);
1033                 goto out;
1034         }
1035
1036         ret = device_irq_init(chip, pdata);
1037         if (ret < 0)
1038                 goto out;
1039
1040         device_regulator_init(chip, pdata);
1041         device_rtc_init(chip, pdata);
1042         device_onkey_init(chip, pdata);
1043         device_touch_init(chip, pdata);
1044         device_power_init(chip, pdata);
1045         device_codec_init(chip, pdata);
1046 out:
1047         return;
1048 }
1049
1050 static void device_8606_init(struct pm860x_chip *chip,
1051                                        struct i2c_client *i2c,
1052                                        struct pm860x_platform_data *pdata)
1053 {
1054         device_osc_init(i2c);
1055         device_bk_init(chip, pdata);
1056         device_led_init(chip, pdata);
1057 }
1058
1059 static int pm860x_device_init(struct pm860x_chip *chip,
1060                                         struct pm860x_platform_data *pdata)
1061 {
1062         chip->core_irq = 0;
1063
1064         switch (chip->id) {
1065         case CHIP_PM8606:
1066                 device_8606_init(chip, chip->client, pdata);
1067                 break;
1068         case CHIP_PM8607:
1069                 device_8607_init(chip, chip->client, pdata);
1070                 break;
1071         }
1072
1073         if (chip->companion) {
1074                 switch (chip->id) {
1075                 case CHIP_PM8607:
1076                         device_8606_init(chip, chip->companion, pdata);
1077                         break;
1078                 case CHIP_PM8606:
1079                         device_8607_init(chip, chip->companion, pdata);
1080                         break;
1081                 }
1082         }
1083
1084         return 0;
1085 }
1086
1087 static void pm860x_device_exit(struct pm860x_chip *chip)
1088 {
1089         device_irq_exit(chip);
1090         mfd_remove_devices(chip->dev);
1091 }
1092
1093 static int verify_addr(struct i2c_client *i2c)
1094 {
1095         unsigned short addr_8607[] = {0x30, 0x34};
1096         unsigned short addr_8606[] = {0x10, 0x11};
1097         int size, i;
1098
1099         if (i2c == NULL)
1100                 return 0;
1101         size = ARRAY_SIZE(addr_8606);
1102         for (i = 0; i < size; i++) {
1103                 if (i2c->addr == *(addr_8606 + i))
1104                         return CHIP_PM8606;
1105         }
1106         size = ARRAY_SIZE(addr_8607);
1107         for (i = 0; i < size; i++) {
1108                 if (i2c->addr == *(addr_8607 + i))
1109                         return CHIP_PM8607;
1110         }
1111         return 0;
1112 }
1113
1114 static const struct regmap_config pm860x_regmap_config = {
1115         .reg_bits = 8,
1116         .val_bits = 8,
1117 };
1118
1119 static int pm860x_dt_init(struct device_node *np,
1120                                     struct device *dev,
1121                                     struct pm860x_platform_data *pdata)
1122 {
1123         int ret;
1124
1125         if (of_get_property(np, "marvell,88pm860x-irq-read-clr", NULL))
1126                 pdata->irq_mode = 1;
1127         ret = of_property_read_u32(np, "marvell,88pm860x-slave-addr",
1128                                    &pdata->companion_addr);
1129         if (ret) {
1130                 dev_err(dev,
1131                         "Not found \"marvell,88pm860x-slave-addr\" property\n");
1132                 pdata->companion_addr = 0;
1133         }
1134         return 0;
1135 }
1136
1137 static int pm860x_probe(struct i2c_client *client,
1138                                   const struct i2c_device_id *id)
1139 {
1140         struct pm860x_platform_data *pdata = dev_get_platdata(&client->dev);
1141         struct device_node *node = client->dev.of_node;
1142         struct pm860x_chip *chip;
1143         int ret;
1144
1145         if (node && !pdata) {
1146                 /* parse DT to get platform data */
1147                 pdata = devm_kzalloc(&client->dev,
1148                                      sizeof(struct pm860x_platform_data),
1149                                      GFP_KERNEL);
1150                 if (!pdata)
1151                         return -ENOMEM;
1152                 ret = pm860x_dt_init(node, &client->dev, pdata);
1153                 if (ret)
1154                         return ret;
1155         } else if (!pdata) {
1156                 pr_info("No platform data in %s!\n", __func__);
1157                 return -EINVAL;
1158         }
1159
1160         chip = devm_kzalloc(&client->dev,
1161                             sizeof(struct pm860x_chip), GFP_KERNEL);
1162         if (chip == NULL)
1163                 return -ENOMEM;
1164
1165         chip->id = verify_addr(client);
1166         chip->regmap = devm_regmap_init_i2c(client, &pm860x_regmap_config);
1167         if (IS_ERR(chip->regmap)) {
1168                 ret = PTR_ERR(chip->regmap);
1169                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
1170                                 ret);
1171                 return ret;
1172         }
1173         chip->client = client;
1174         i2c_set_clientdata(client, chip);
1175         chip->dev = &client->dev;
1176         dev_set_drvdata(chip->dev, chip);
1177
1178         /*
1179          * Both client and companion client shares same platform driver.
1180          * Driver distinguishes them by pdata->companion_addr.
1181          * pdata->companion_addr is only assigned if companion chip exists.
1182          * At the same time, the companion_addr shouldn't equal to client
1183          * address.
1184          */
1185         if (pdata->companion_addr && (pdata->companion_addr != client->addr)) {
1186                 chip->companion_addr = pdata->companion_addr;
1187                 chip->companion = i2c_new_dummy(chip->client->adapter,
1188                                                 chip->companion_addr);
1189                 if (!chip->companion) {
1190                         dev_err(&client->dev,
1191                                 "Failed to allocate I2C companion device\n");
1192                         return -ENODEV;
1193                 }
1194                 chip->regmap_companion = regmap_init_i2c(chip->companion,
1195                                                         &pm860x_regmap_config);
1196                 if (IS_ERR(chip->regmap_companion)) {
1197                         ret = PTR_ERR(chip->regmap_companion);
1198                         dev_err(&chip->companion->dev,
1199                                 "Failed to allocate register map: %d\n", ret);
1200                         i2c_unregister_device(chip->companion);
1201                         return ret;
1202                 }
1203                 i2c_set_clientdata(chip->companion, chip);
1204         }
1205
1206         pm860x_device_init(chip, pdata);
1207         return 0;
1208 }
1209
1210 static int pm860x_remove(struct i2c_client *client)
1211 {
1212         struct pm860x_chip *chip = i2c_get_clientdata(client);
1213
1214         pm860x_device_exit(chip);
1215         if (chip->companion) {
1216                 regmap_exit(chip->regmap_companion);
1217                 i2c_unregister_device(chip->companion);
1218         }
1219         return 0;
1220 }
1221
1222 #ifdef CONFIG_PM_SLEEP
1223 static int pm860x_suspend(struct device *dev)
1224 {
1225         struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1226         struct pm860x_chip *chip = i2c_get_clientdata(client);
1227
1228         if (device_may_wakeup(dev) && chip->wakeup_flag)
1229                 enable_irq_wake(chip->core_irq);
1230         return 0;
1231 }
1232
1233 static int pm860x_resume(struct device *dev)
1234 {
1235         struct i2c_client *client = container_of(dev, struct i2c_client, dev);
1236         struct pm860x_chip *chip = i2c_get_clientdata(client);
1237
1238         if (device_may_wakeup(dev) && chip->wakeup_flag)
1239                 disable_irq_wake(chip->core_irq);
1240         return 0;
1241 }
1242 #endif
1243
1244 static SIMPLE_DEV_PM_OPS(pm860x_pm_ops, pm860x_suspend, pm860x_resume);
1245
1246 static const struct i2c_device_id pm860x_id_table[] = {
1247         { "88PM860x", 0 },
1248         {}
1249 };
1250 MODULE_DEVICE_TABLE(i2c, pm860x_id_table);
1251
1252 static const struct of_device_id pm860x_dt_ids[] = {
1253         { .compatible = "marvell,88pm860x", },
1254         {},
1255 };
1256 MODULE_DEVICE_TABLE(of, pm860x_dt_ids);
1257
1258 static struct i2c_driver pm860x_driver = {
1259         .driver = {
1260                 .name   = "88PM860x",
1261                 .owner  = THIS_MODULE,
1262                 .pm     = &pm860x_pm_ops,
1263                 .of_match_table = pm860x_dt_ids,
1264         },
1265         .probe          = pm860x_probe,
1266         .remove         = pm860x_remove,
1267         .id_table       = pm860x_id_table,
1268 };
1269
1270 static int __init pm860x_i2c_init(void)
1271 {
1272         int ret;
1273         ret = i2c_add_driver(&pm860x_driver);
1274         if (ret != 0)
1275                 pr_err("Failed to register 88PM860x I2C driver: %d\n", ret);
1276         return ret;
1277 }
1278 subsys_initcall(pm860x_i2c_init);
1279
1280 static void __exit pm860x_i2c_exit(void)
1281 {
1282         i2c_del_driver(&pm860x_driver);
1283 }
1284 module_exit(pm860x_i2c_exit);
1285
1286 MODULE_DESCRIPTION("PMIC Driver for Marvell 88PM860x");
1287 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
1288 MODULE_LICENSE("GPL");