drivers/mfd/da9062-core.c

   1 /*
   2  * Core, IRQ and I2C device driver for DA9062 PMIC
   3  * Copyright (C) 2015  Dialog Semiconductor Ltd.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/init.h>
  19 #include <linux/device.h>
  20 #include <linux/interrupt.h>
  21 #include <linux/regmap.h>
  22 #include <linux/irq.h>
  23 #include <linux/mfd/core.h>
  24 #include <linux/i2c.h>
  25 #include <linux/mfd/da9062/core.h>
  26 #include <linux/mfd/da9062/registers.h>
  27 #include <linux/regulator/of_regulator.h>
  28
  29 #define DA9062_REG_EVENT_A_OFFSET       0
  30 #define DA9062_REG_EVENT_B_OFFSET       1
  31 #define DA9062_REG_EVENT_C_OFFSET       2
  32
  33 static struct regmap_irq da9062_irqs[] = {
  34         /* EVENT A */
  35         [DA9062_IRQ_ONKEY] = {
  36                 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
  37                 .mask = DA9062AA_M_NONKEY_MASK,
  38         },
  39         [DA9062_IRQ_ALARM] = {
  40                 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
  41                 .mask = DA9062AA_M_ALARM_MASK,
  42         },
  43         [DA9062_IRQ_TICK] = {
  44                 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
  45                 .mask = DA9062AA_M_TICK_MASK,
  46         },
  47         [DA9062_IRQ_WDG_WARN] = {
  48                 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
  49                 .mask = DA9062AA_M_WDG_WARN_MASK,
  50         },
  51         [DA9062_IRQ_SEQ_RDY] = {
  52                 .reg_offset = DA9062_REG_EVENT_A_OFFSET,
  53                 .mask = DA9062AA_M_SEQ_RDY_MASK,
  54         },
  55         /* EVENT B */
  56         [DA9062_IRQ_TEMP] = {
  57                 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
  58                 .mask = DA9062AA_M_TEMP_MASK,
  59         },
  60         [DA9062_IRQ_LDO_LIM] = {
  61                 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
  62                 .mask = DA9062AA_M_LDO_LIM_MASK,
  63         },
  64         [DA9062_IRQ_DVC_RDY] = {
  65                 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
  66                 .mask = DA9062AA_M_DVC_RDY_MASK,
  67         },
  68         [DA9062_IRQ_VDD_WARN] = {
  69                 .reg_offset = DA9062_REG_EVENT_B_OFFSET,
  70                 .mask = DA9062AA_M_VDD_WARN_MASK,
  71         },
  72         /* EVENT C */
  73         [DA9062_IRQ_GPI0] = {
  74                 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
  75                 .mask = DA9062AA_M_GPI0_MASK,
  76         },
  77         [DA9062_IRQ_GPI1] = {
  78                 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
  79                 .mask = DA9062AA_M_GPI1_MASK,
  80         },
  81         [DA9062_IRQ_GPI2] = {
  82                 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
  83                 .mask = DA9062AA_M_GPI2_MASK,
  84         },
  85         [DA9062_IRQ_GPI3] = {
  86                 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
  87                 .mask = DA9062AA_M_GPI3_MASK,
  88         },
  89         [DA9062_IRQ_GPI4] = {
  90                 .reg_offset = DA9062_REG_EVENT_C_OFFSET,
  91                 .mask = DA9062AA_M_GPI4_MASK,
  92         },
  93 };
  94
  95 static struct regmap_irq_chip da9062_irq_chip = {
  96         .name = "da9062-irq",
  97         .irqs = da9062_irqs,
  98         .num_irqs = DA9062_NUM_IRQ,
  99         .num_regs = 3,
 100         .status_base = DA9062AA_EVENT_A,
 101         .mask_base = DA9062AA_IRQ_MASK_A,
 102         .ack_base = DA9062AA_EVENT_A,
 103 };
 104
 105 static struct resource da9062_core_resources[] = {
 106         DEFINE_RES_NAMED(DA9062_IRQ_VDD_WARN, 1, "VDD_WARN", IORESOURCE_IRQ),
 107 };
 108
 109 static struct resource da9062_regulators_resources[] = {
 110         DEFINE_RES_NAMED(DA9062_IRQ_LDO_LIM, 1, "LDO_LIM", IORESOURCE_IRQ),
 111 };
 112
 113 static struct resource da9062_thermal_resources[] = {
 114         DEFINE_RES_NAMED(DA9062_IRQ_TEMP, 1, "THERMAL", IORESOURCE_IRQ),
 115 };
 116
 117 static struct resource da9062_wdt_resources[] = {
 118         DEFINE_RES_NAMED(DA9062_IRQ_WDG_WARN, 1, "WD_WARN", IORESOURCE_IRQ),
 119 };
 120
 121 static struct resource da9062_rtc_resources[] = {
 122         DEFINE_RES_NAMED(DA9062_IRQ_ALARM, 1, "ALARM", IORESOURCE_IRQ),
 123         DEFINE_RES_NAMED(DA9062_IRQ_TICK, 1, "TICK", IORESOURCE_IRQ),
 124 };
 125
 126 static struct resource da9062_onkey_resources[] = {
 127         DEFINE_RES_NAMED(DA9062_IRQ_ONKEY, 1, "ONKEY", IORESOURCE_IRQ),
 128 };
 129
 130 static const struct mfd_cell da9062_devs[] = {
 131         {
 132                 .name           = "da9062-core",
 133                 .num_resources  = ARRAY_SIZE(da9062_core_resources),
 134                 .resources      = da9062_core_resources,
 135         },
 136         {
 137                 .name           = "da9062-regulators",
 138                 .num_resources  = ARRAY_SIZE(da9062_regulators_resources),
 139                 .resources      = da9062_regulators_resources,
 140         },
 141         {
 142                 .name           = "da9062-watchdog",
 143                 .num_resources  = ARRAY_SIZE(da9062_wdt_resources),
 144                 .resources      = da9062_wdt_resources,
 145                 .of_compatible  = "dlg,da9062-watchdog",
 146         },
 147         {
 148                 .name           = "da9062-thermal",
 149                 .num_resources  = ARRAY_SIZE(da9062_thermal_resources),
 150                 .resources      = da9062_thermal_resources,
 151                 .of_compatible  = "dlg,da9062-thermal",
 152         },
 153         {
 154                 .name           = "da9062-rtc",
 155                 .num_resources  = ARRAY_SIZE(da9062_rtc_resources),
 156                 .resources      = da9062_rtc_resources,
 157                 .of_compatible  = "dlg,da9062-rtc",
 158         },
 159         {
 160                 .name           = "da9062-onkey",
 161                 .num_resources  = ARRAY_SIZE(da9062_onkey_resources),
 162                 .resources      = da9062_onkey_resources,
 163                 .of_compatible = "dlg,da9062-onkey",
 164         },
 165 };
 166
 167 static int da9062_clear_fault_log(struct da9062 *chip)
 168 {
 169         int ret;
 170         int fault_log;
 171
 172         ret = regmap_read(chip->regmap, DA9062AA_FAULT_LOG, &fault_log);
 173         if (ret < 0)
 174                 return ret;
 175
 176         if (fault_log) {
 177                 if (fault_log & DA9062AA_TWD_ERROR_MASK)
 178                         dev_dbg(chip->dev, "Fault log entry detected: TWD_ERROR\n");
 179                 if (fault_log & DA9062AA_POR_MASK)
 180                         dev_dbg(chip->dev, "Fault log entry detected: POR\n");
 181                 if (fault_log & DA9062AA_VDD_FAULT_MASK)
 182                         dev_dbg(chip->dev, "Fault log entry detected: VDD_FAULT\n");
 183                 if (fault_log & DA9062AA_VDD_START_MASK)
 184                         dev_dbg(chip->dev, "Fault log entry detected: VDD_START\n");
 185                 if (fault_log & DA9062AA_TEMP_CRIT_MASK)
 186                         dev_dbg(chip->dev, "Fault log entry detected: TEMP_CRIT\n");
 187                 if (fault_log & DA9062AA_KEY_RESET_MASK)
 188                         dev_dbg(chip->dev, "Fault log entry detected: KEY_RESET\n");
 189                 if (fault_log & DA9062AA_NSHUTDOWN_MASK)
 190                         dev_dbg(chip->dev, "Fault log entry detected: NSHUTDOWN\n");
 191                 if (fault_log & DA9062AA_WAIT_SHUT_MASK)
 192                         dev_dbg(chip->dev, "Fault log entry detected: WAIT_SHUT\n");
 193
 194                 ret = regmap_write(chip->regmap, DA9062AA_FAULT_LOG,
 195                                    fault_log);
 196         }
 197
 198         return ret;
 199 }
 200
 201 static int da9062_get_device_type(struct da9062 *chip)
 202 {
 203         int device_id, variant_id, variant_mrc;
 204         int ret;
 205
 206         ret = regmap_read(chip->regmap, DA9062AA_DEVICE_ID, &device_id);
 207         if (ret < 0) {
 208                 dev_err(chip->dev, "Cannot read chip ID.\n");
 209                 return -EIO;
 210         }
 211         if (device_id != DA9062_PMIC_DEVICE_ID) {
 212                 dev_err(chip->dev, "Invalid device ID: 0x%02x\n", device_id);
 213                 return -ENODEV;
 214         }
 215
 216         ret = regmap_read(chip->regmap, DA9062AA_VARIANT_ID, &variant_id);
 217         if (ret < 0) {
 218                 dev_err(chip->dev, "Cannot read chip variant id.\n");
 219                 return -EIO;
 220         }
 221
 222         dev_info(chip->dev,
 223                  "Device detected (device-ID: 0x%02X, var-ID: 0x%02X)\n",
 224                  device_id, variant_id);
 225
 226         variant_mrc = (variant_id & DA9062AA_MRC_MASK) >> DA9062AA_MRC_SHIFT;
 227
 228         if (variant_mrc < DA9062_PMIC_VARIANT_MRC_AA) {
 229                 dev_err(chip->dev,
 230                         "Cannot support variant MRC: 0x%02X\n", variant_mrc);
 231                 return -ENODEV;
 232         }
 233
 234         return ret;
 235 }
 236
 237 static const struct regmap_range da9062_aa_readable_ranges[] = {
 238         {
 239                 .range_min = DA9062AA_PAGE_CON,
 240                 .range_max = DA9062AA_STATUS_B,
 241         }, {
 242                 .range_min = DA9062AA_STATUS_D,
 243                 .range_max = DA9062AA_EVENT_C,
 244         }, {
 245                 .range_min = DA9062AA_IRQ_MASK_A,
 246                 .range_max = DA9062AA_IRQ_MASK_C,
 247         }, {
 248                 .range_min = DA9062AA_CONTROL_A,
 249                 .range_max = DA9062AA_GPIO_4,
 250         }, {
 251                 .range_min = DA9062AA_GPIO_WKUP_MODE,
 252                 .range_max = DA9062AA_BUCK4_CONT,
 253         }, {
 254                 .range_min = DA9062AA_BUCK3_CONT,
 255                 .range_max = DA9062AA_BUCK3_CONT,
 256         }, {
 257                 .range_min = DA9062AA_LDO1_CONT,
 258                 .range_max = DA9062AA_LDO4_CONT,
 259         }, {
 260                 .range_min = DA9062AA_DVC_1,
 261                 .range_max = DA9062AA_DVC_1,
 262         }, {
 263                 .range_min = DA9062AA_COUNT_S,
 264                 .range_max = DA9062AA_SECOND_D,
 265         }, {
 266                 .range_min = DA9062AA_SEQ,
 267                 .range_max = DA9062AA_ID_4_3,
 268         }, {
 269                 .range_min = DA9062AA_ID_12_11,
 270                 .range_max = DA9062AA_ID_16_15,
 271         }, {
 272                 .range_min = DA9062AA_ID_22_21,
 273                 .range_max = DA9062AA_ID_32_31,
 274         }, {
 275                 .range_min = DA9062AA_SEQ_A,
 276                 .range_max = DA9062AA_BUCK3_CFG,
 277         }, {
 278                 .range_min = DA9062AA_VBUCK2_A,
 279                 .range_max = DA9062AA_VBUCK4_A,
 280         }, {
 281                 .range_min = DA9062AA_VBUCK3_A,
 282                 .range_max = DA9062AA_VBUCK3_A,
 283         }, {
 284                 .range_min = DA9062AA_VLDO1_A,
 285                 .range_max = DA9062AA_VLDO4_A,
 286         }, {
 287                 .range_min = DA9062AA_VBUCK2_B,
 288                 .range_max = DA9062AA_VBUCK4_B,
 289         }, {
 290                 .range_min = DA9062AA_VBUCK3_B,
 291                 .range_max = DA9062AA_VBUCK3_B,
 292         }, {
 293                 .range_min = DA9062AA_VLDO1_B,
 294                 .range_max = DA9062AA_VLDO4_B,
 295         }, {
 296                 .range_min = DA9062AA_BBAT_CONT,
 297                 .range_max = DA9062AA_BBAT_CONT,
 298         }, {
 299                 .range_min = DA9062AA_INTERFACE,
 300                 .range_max = DA9062AA_CONFIG_E,
 301         }, {
 302                 .range_min = DA9062AA_CONFIG_G,
 303                 .range_max = DA9062AA_CONFIG_K,
 304         }, {
 305                 .range_min = DA9062AA_CONFIG_M,
 306                 .range_max = DA9062AA_CONFIG_M,
 307         }, {
 308                 .range_min = DA9062AA_TRIM_CLDR,
 309                 .range_max = DA9062AA_GP_ID_19,
 310         }, {
 311                 .range_min = DA9062AA_DEVICE_ID,
 312                 .range_max = DA9062AA_CONFIG_ID,
 313         },
 314 };
 315
 316 static const struct regmap_range da9062_aa_writeable_ranges[] = {
 317         {
 318                 .range_min = DA9062AA_PAGE_CON,
 319                 .range_max = DA9062AA_PAGE_CON,
 320         }, {
 321                 .range_min = DA9062AA_FAULT_LOG,
 322                 .range_max = DA9062AA_EVENT_C,
 323         }, {
 324                 .range_min = DA9062AA_IRQ_MASK_A,
 325                 .range_max = DA9062AA_IRQ_MASK_C,
 326         }, {
 327                 .range_min = DA9062AA_CONTROL_A,
 328                 .range_max = DA9062AA_GPIO_4,
 329         }, {
 330                 .range_min = DA9062AA_GPIO_WKUP_MODE,
 331                 .range_max = DA9062AA_BUCK4_CONT,
 332         }, {
 333                 .range_min = DA9062AA_BUCK3_CONT,
 334                 .range_max = DA9062AA_BUCK3_CONT,
 335         }, {
 336                 .range_min = DA9062AA_LDO1_CONT,
 337                 .range_max = DA9062AA_LDO4_CONT,
 338         }, {
 339                 .range_min = DA9062AA_DVC_1,
 340                 .range_max = DA9062AA_DVC_1,
 341         }, {
 342                 .range_min = DA9062AA_COUNT_S,
 343                 .range_max = DA9062AA_ALARM_Y,
 344         }, {
 345                 .range_min = DA9062AA_SEQ,
 346                 .range_max = DA9062AA_ID_4_3,
 347         }, {
 348                 .range_min = DA9062AA_ID_12_11,
 349                 .range_max = DA9062AA_ID_16_15,
 350         }, {
 351                 .range_min = DA9062AA_ID_22_21,
 352                 .range_max = DA9062AA_ID_32_31,
 353         }, {
 354                 .range_min = DA9062AA_SEQ_A,
 355                 .range_max = DA9062AA_BUCK3_CFG,
 356         }, {
 357                 .range_min = DA9062AA_VBUCK2_A,
 358                 .range_max = DA9062AA_VBUCK4_A,
 359         }, {
 360                 .range_min = DA9062AA_VBUCK3_A,
 361                 .range_max = DA9062AA_VBUCK3_A,
 362         }, {
 363                 .range_min = DA9062AA_VLDO1_A,
 364                 .range_max = DA9062AA_VLDO4_A,
 365         }, {
 366                 .range_min = DA9062AA_VBUCK2_B,
 367                 .range_max = DA9062AA_VBUCK4_B,
 368         }, {
 369                 .range_min = DA9062AA_VBUCK3_B,
 370                 .range_max = DA9062AA_VBUCK3_B,
 371         }, {
 372                 .range_min = DA9062AA_VLDO1_B,
 373                 .range_max = DA9062AA_VLDO4_B,
 374         }, {
 375                 .range_min = DA9062AA_BBAT_CONT,
 376                 .range_max = DA9062AA_BBAT_CONT,
 377         }, {
 378                 .range_min = DA9062AA_GP_ID_0,
 379                 .range_max = DA9062AA_GP_ID_19,
 380         },
 381 };
 382
 383 static const struct regmap_range da9062_aa_volatile_ranges[] = {
 384         {
 385                 .range_min = DA9062AA_PAGE_CON,
 386                 .range_max = DA9062AA_STATUS_B,
 387         }, {
 388                 .range_min = DA9062AA_STATUS_D,
 389                 .range_max = DA9062AA_EVENT_C,
 390         }, {
 391                 .range_min = DA9062AA_CONTROL_F,
 392                 .range_max = DA9062AA_CONTROL_F,
 393         }, {
 394                 .range_min = DA9062AA_COUNT_S,
 395                 .range_max = DA9062AA_SECOND_D,
 396         },
 397 };
 398
 399 static const struct regmap_access_table da9062_aa_readable_table = {
 400         .yes_ranges = da9062_aa_readable_ranges,
 401         .n_yes_ranges = ARRAY_SIZE(da9062_aa_readable_ranges),
 402 };
 403
 404 static const struct regmap_access_table da9062_aa_writeable_table = {
 405         .yes_ranges = da9062_aa_writeable_ranges,
 406         .n_yes_ranges = ARRAY_SIZE(da9062_aa_writeable_ranges),
 407 };
 408
 409 static const struct regmap_access_table da9062_aa_volatile_table = {
 410         .yes_ranges = da9062_aa_volatile_ranges,
 411         .n_yes_ranges = ARRAY_SIZE(da9062_aa_volatile_ranges),
 412 };
 413
 414 static const struct regmap_range_cfg da9062_range_cfg[] = {
 415         {
 416                 .range_min = DA9062AA_PAGE_CON,
 417                 .range_max = DA9062AA_CONFIG_ID,
 418                 .selector_reg = DA9062AA_PAGE_CON,
 419                 .selector_mask = 1 << DA9062_I2C_PAGE_SEL_SHIFT,
 420                 .selector_shift = DA9062_I2C_PAGE_SEL_SHIFT,
 421                 .window_start = 0,
 422                 .window_len = 256,
 423         }
 424 };
 425
 426 static struct regmap_config da9062_regmap_config = {
 427         .reg_bits = 8,
 428         .val_bits = 8,
 429         .ranges = da9062_range_cfg,
 430         .num_ranges = ARRAY_SIZE(da9062_range_cfg),
 431         .max_register = DA9062AA_CONFIG_ID,
 432         .cache_type = REGCACHE_RBTREE,
 433         .rd_table = &da9062_aa_readable_table,
 434         .wr_table = &da9062_aa_writeable_table,
 435         .volatile_table = &da9062_aa_volatile_table,
 436 };
 437
 438 static int da9062_i2c_probe(struct i2c_client *i2c,
 439         const struct i2c_device_id *id)
 440 {
 441         struct da9062 *chip;
 442         unsigned int irq_base;
 443         int ret;
 444
 445         chip = devm_kzalloc(&i2c->dev, sizeof(*chip), GFP_KERNEL);
 446         if (!chip)
 447                 return -ENOMEM;
 448
 449         i2c_set_clientdata(i2c, chip);
 450         chip->dev = &i2c->dev;
 451
 452         if (!i2c->irq) {
 453                 dev_err(chip->dev, "No IRQ configured\n");
 454                 return -EINVAL;
 455         }
 456
 457         chip->regmap = devm_regmap_init_i2c(i2c, &da9062_regmap_config);
 458         if (IS_ERR(chip->regmap)) {
 459                 ret = PTR_ERR(chip->regmap);
 460                 dev_err(chip->dev, "Failed to allocate register map: %d\n",
 461                         ret);
 462                 return ret;
 463         }
 464
 465         ret = da9062_clear_fault_log(chip);
 466         if (ret < 0)
 467                 dev_warn(chip->dev, "Cannot clear fault log\n");
 468
 469         ret = da9062_get_device_type(chip);
 470         if (ret)
 471                 return ret;
 472
 473         ret = regmap_add_irq_chip(chip->regmap, i2c->irq,
 474                         IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
 475                         -1, &da9062_irq_chip,
 476                         &chip->regmap_irq);
 477         if (ret) {
 478                 dev_err(chip->dev, "Failed to request IRQ %d: %d\n",
 479                         i2c->irq, ret);
 480                 return ret;
 481         }
 482
 483         irq_base = regmap_irq_chip_get_base(chip->regmap_irq);
 484
 485         ret = mfd_add_devices(chip->dev, PLATFORM_DEVID_NONE, da9062_devs,
 486                               ARRAY_SIZE(da9062_devs), NULL, irq_base,
 487                               NULL);
 488         if (ret) {
 489                 dev_err(chip->dev, "Cannot register child devices\n");
 490                 regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
 491                 return ret;
 492         }
 493
 494         return ret;
 495 }
 496
 497 static int da9062_i2c_remove(struct i2c_client *i2c)
 498 {
 499         struct da9062 *chip = i2c_get_clientdata(i2c);
 500
 501         mfd_remove_devices(chip->dev);
 502         regmap_del_irq_chip(i2c->irq, chip->regmap_irq);
 503
 504         return 0;
 505 }
 506
 507 static const struct i2c_device_id da9062_i2c_id[] = {
 508         { "da9062", 0 },
 509         { },
 510 };
 511 MODULE_DEVICE_TABLE(i2c, da9062_i2c_id);
 512
 513 static const struct of_device_id da9062_dt_ids[] = {
 514         { .compatible = "dlg,da9062", },
 515         { }
 516 };
 517 MODULE_DEVICE_TABLE(of, da9062_dt_ids);
 518
 519 static struct i2c_driver da9062_i2c_driver = {
 520         .driver = {
 521                 .name = "da9062",
 522                 .of_match_table = of_match_ptr(da9062_dt_ids),
 523         },
 524         .probe    = da9062_i2c_probe,
 525         .remove   = da9062_i2c_remove,
 526         .id_table = da9062_i2c_id,
 527 };
 528
 529 module_i2c_driver(da9062_i2c_driver);
 530
 531 MODULE_DESCRIPTION("Core device driver for Dialog DA9062");
 532 MODULE_AUTHOR("Steve Twiss <stwiss.opensource@diasemi.com>");
 533 MODULE_LICENSE("GPL");