drivers/mfd/sec-core.c

   1 /*
   2  * sec-core.c
   3  *
   4  * Copyright (c) 2012 Samsung Electronics Co., Ltd
   5  *              http://www.samsung.com
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/i2c.h>
  20 #include <linux/of.h>
  21 #include <linux/of_irq.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/mutex.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/mfd/samsung/core.h>
  27 #include <linux/mfd/samsung/irq.h>
  28 #include <linux/mfd/samsung/s2mpa01.h>
  29 #include <linux/mfd/samsung/s2mps11.h>
  30 #include <linux/mfd/samsung/s2mps13.h>
  31 #include <linux/mfd/samsung/s2mps14.h>
  32 #include <linux/mfd/samsung/s2mpu02.h>
  33 #include <linux/mfd/samsung/s5m8763.h>
  34 #include <linux/mfd/samsung/s5m8767.h>
  35 #include <linux/regmap.h>
  36
  37 static const struct mfd_cell s5m8751_devs[] = {
  38         {
  39                 .name = "s5m8751-pmic",
  40         }, {
  41                 .name = "s5m-charger",
  42         }, {
  43                 .name = "s5m8751-codec",
  44         },
  45 };
  46
  47 static const struct mfd_cell s5m8763_devs[] = {
  48         {
  49                 .name = "s5m8763-pmic",
  50         }, {
  51                 .name = "s5m-rtc",
  52         }, {
  53                 .name = "s5m-charger",
  54         },
  55 };
  56
  57 static const struct mfd_cell s5m8767_devs[] = {
  58         {
  59                 .name = "s5m8767-pmic",
  60         }, {
  61                 .name = "s5m-rtc",
  62         }, {
  63                 .name = "s5m8767-clk",
  64                 .of_compatible = "samsung,s5m8767-clk",
  65         }
  66 };
  67
  68 static const struct mfd_cell s2mps11_devs[] = {
  69         {
  70                 .name = "s2mps11-pmic",
  71         }, {
  72                 .name = "s2mps11-clk",
  73                 .of_compatible = "samsung,s2mps11-clk",
  74         }
  75 };
  76
  77 static const struct mfd_cell s2mps13_devs[] = {
  78         { .name = "s2mps13-pmic", },
  79         { .name = "s2mps13-rtc", },
  80         {
  81                 .name = "s2mps13-clk",
  82                 .of_compatible = "samsung,s2mps13-clk",
  83         },
  84 };
  85
  86 static const struct mfd_cell s2mps14_devs[] = {
  87         {
  88                 .name = "s2mps14-pmic",
  89         }, {
  90                 .name = "s2mps14-rtc",
  91         }, {
  92                 .name = "s2mps14-clk",
  93                 .of_compatible = "samsung,s2mps14-clk",
  94         }
  95 };
  96
  97 static const struct mfd_cell s2mpa01_devs[] = {
  98         {
  99                 .name = "s2mpa01-pmic",
 100         },
 101 };
 102
 103 static const struct mfd_cell s2mpu02_devs[] = {
 104         { .name = "s2mpu02-pmic", },
 105         { .name = "s2mpu02-rtc", },
 106         {
 107                 .name = "s2mpu02-clk",
 108                 .of_compatible = "samsung,s2mpu02-clk",
 109         }
 110 };
 111
 112 #ifdef CONFIG_OF
 113 static const struct of_device_id sec_dt_match[] = {
 114         {       .compatible = "samsung,s5m8767-pmic",
 115                 .data = (void *)S5M8767X,
 116         }, {
 117                 .compatible = "samsung,s2mps11-pmic",
 118                 .data = (void *)S2MPS11X,
 119         }, {
 120                 .compatible = "samsung,s2mps13-pmic",
 121                 .data = (void *)S2MPS13X,
 122         }, {
 123                 .compatible = "samsung,s2mps14-pmic",
 124                 .data = (void *)S2MPS14X,
 125         }, {
 126                 .compatible = "samsung,s2mpa01-pmic",
 127                 .data = (void *)S2MPA01,
 128         }, {
 129                 .compatible = "samsung,s2mpu02-pmic",
 130                 .data = (void *)S2MPU02,
 131         }, {
 132                 /* Sentinel */
 133         },
 134 };
 135 #endif
 136
 137 static bool s2mpa01_volatile(struct device *dev, unsigned int reg)
 138 {
 139         switch (reg) {
 140         case S2MPA01_REG_INT1M:
 141         case S2MPA01_REG_INT2M:
 142         case S2MPA01_REG_INT3M:
 143                 return false;
 144         default:
 145                 return true;
 146         }
 147 }
 148
 149 static bool s2mps11_volatile(struct device *dev, unsigned int reg)
 150 {
 151         switch (reg) {
 152         case S2MPS11_REG_INT1M:
 153         case S2MPS11_REG_INT2M:
 154         case S2MPS11_REG_INT3M:
 155                 return false;
 156         default:
 157                 return true;
 158         }
 159 }
 160
 161 static bool s2mpu02_volatile(struct device *dev, unsigned int reg)
 162 {
 163         switch (reg) {
 164         case S2MPU02_REG_INT1M:
 165         case S2MPU02_REG_INT2M:
 166         case S2MPU02_REG_INT3M:
 167                 return false;
 168         default:
 169                 return true;
 170         }
 171 }
 172
 173 static bool s5m8763_volatile(struct device *dev, unsigned int reg)
 174 {
 175         switch (reg) {
 176         case S5M8763_REG_IRQM1:
 177         case S5M8763_REG_IRQM2:
 178         case S5M8763_REG_IRQM3:
 179         case S5M8763_REG_IRQM4:
 180                 return false;
 181         default:
 182                 return true;
 183         }
 184 }
 185
 186 static const struct regmap_config sec_regmap_config = {
 187         .reg_bits = 8,
 188         .val_bits = 8,
 189 };
 190
 191 static const struct regmap_config s2mpa01_regmap_config = {
 192         .reg_bits = 8,
 193         .val_bits = 8,
 194
 195         .max_register = S2MPA01_REG_LDO_OVCB4,
 196         .volatile_reg = s2mpa01_volatile,
 197         .cache_type = REGCACHE_FLAT,
 198 };
 199
 200 static const struct regmap_config s2mps11_regmap_config = {
 201         .reg_bits = 8,
 202         .val_bits = 8,
 203
 204         .max_register = S2MPS11_REG_L38CTRL,
 205         .volatile_reg = s2mps11_volatile,
 206         .cache_type = REGCACHE_FLAT,
 207 };
 208
 209 static const struct regmap_config s2mps13_regmap_config = {
 210         .reg_bits = 8,
 211         .val_bits = 8,
 212
 213         .max_register = S2MPS13_REG_LDODSCH5,
 214         .volatile_reg = s2mps11_volatile,
 215         .cache_type = REGCACHE_FLAT,
 216 };
 217
 218 static const struct regmap_config s2mps14_regmap_config = {
 219         .reg_bits = 8,
 220         .val_bits = 8,
 221
 222         .max_register = S2MPS14_REG_LDODSCH3,
 223         .volatile_reg = s2mps11_volatile,
 224         .cache_type = REGCACHE_FLAT,
 225 };
 226
 227 static const struct regmap_config s2mpu02_regmap_config = {
 228         .reg_bits = 8,
 229         .val_bits = 8,
 230
 231         .max_register = S2MPU02_REG_DVSDATA,
 232         .volatile_reg = s2mpu02_volatile,
 233         .cache_type = REGCACHE_FLAT,
 234 };
 235
 236 static const struct regmap_config s5m8763_regmap_config = {
 237         .reg_bits = 8,
 238         .val_bits = 8,
 239
 240         .max_register = S5M8763_REG_LBCNFG2,
 241         .volatile_reg = s5m8763_volatile,
 242         .cache_type = REGCACHE_FLAT,
 243 };
 244
 245 static const struct regmap_config s5m8767_regmap_config = {
 246         .reg_bits = 8,
 247         .val_bits = 8,
 248
 249         .max_register = S5M8767_REG_LDO28CTRL,
 250         .volatile_reg = s2mps11_volatile,
 251         .cache_type = REGCACHE_FLAT,
 252 };
 253
 254 #ifdef CONFIG_OF
 255 /*
 256  * Only the common platform data elements for s5m8767 are parsed here from the
 257  * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
 258  * others have to parse their own platform data elements from device tree.
 259  *
 260  * The s5m8767 platform data structure is instantiated here and the drivers for
 261  * the sub-modules need not instantiate another instance while parsing their
 262  * platform data.
 263  */
 264 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 265                                         struct device *dev)
 266 {
 267         struct sec_platform_data *pd;
 268
 269         pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
 270         if (!pd) {
 271                 dev_err(dev, "could not allocate memory for pdata\n");
 272                 return ERR_PTR(-ENOMEM);
 273         }
 274
 275         /*
 276          * ToDo: the 'wakeup' member in the platform data is more of a linux
 277          * specfic information. Hence, there is no binding for that yet and
 278          * not parsed here.
 279          */
 280
 281         return pd;
 282 }
 283 #else
 284 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 285                                         struct device *dev)
 286 {
 287         return NULL;
 288 }
 289 #endif
 290
 291 static inline unsigned long sec_i2c_get_driver_data(struct i2c_client *i2c,
 292                                                 const struct i2c_device_id *id)
 293 {
 294 #ifdef CONFIG_OF
 295         if (i2c->dev.of_node) {
 296                 const struct of_device_id *match;
 297
 298                 match = of_match_node(sec_dt_match, i2c->dev.of_node);
 299                 return (unsigned long)match->data;
 300         }
 301 #endif
 302         return id->driver_data;
 303 }
 304
 305 static int sec_pmic_probe(struct i2c_client *i2c,
 306                             const struct i2c_device_id *id)
 307 {
 308         struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
 309         const struct regmap_config *regmap;
 310         const struct mfd_cell *sec_devs;
 311         struct sec_pmic_dev *sec_pmic;
 312         unsigned long device_type;
 313         int ret, num_sec_devs;
 314
 315         sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
 316                                 GFP_KERNEL);
 317         if (sec_pmic == NULL)
 318                 return -ENOMEM;
 319
 320         i2c_set_clientdata(i2c, sec_pmic);
 321         sec_pmic->dev = &i2c->dev;
 322         sec_pmic->i2c = i2c;
 323         sec_pmic->irq = i2c->irq;
 324         device_type = sec_i2c_get_driver_data(i2c, id);
 325
 326         if (sec_pmic->dev->of_node) {
 327                 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
 328                 if (IS_ERR(pdata)) {
 329                         ret = PTR_ERR(pdata);
 330                         return ret;
 331                 }
 332                 pdata->device_type = device_type;
 333         }
 334         if (pdata) {
 335                 sec_pmic->device_type = pdata->device_type;
 336                 sec_pmic->ono = pdata->ono;
 337                 sec_pmic->irq_base = pdata->irq_base;
 338                 sec_pmic->wakeup = pdata->wakeup;
 339                 sec_pmic->pdata = pdata;
 340         }
 341
 342         switch (sec_pmic->device_type) {
 343         case S2MPA01:
 344                 regmap = &s2mpa01_regmap_config;
 345                 break;
 346         case S2MPS11X:
 347                 regmap = &s2mps11_regmap_config;
 348                 break;
 349         case S2MPS13X:
 350                 regmap = &s2mps13_regmap_config;
 351                 break;
 352         case S2MPS14X:
 353                 regmap = &s2mps14_regmap_config;
 354                 break;
 355         case S5M8763X:
 356                 regmap = &s5m8763_regmap_config;
 357                 break;
 358         case S5M8767X:
 359                 regmap = &s5m8767_regmap_config;
 360                 break;
 361         case S2MPU02:
 362                 regmap = &s2mpu02_regmap_config;
 363                 break;
 364         default:
 365                 regmap = &sec_regmap_config;
 366                 break;
 367         }
 368
 369         sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
 370         if (IS_ERR(sec_pmic->regmap_pmic)) {
 371                 ret = PTR_ERR(sec_pmic->regmap_pmic);
 372                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 373                         ret);
 374                 return ret;
 375         }
 376
 377         if (pdata && pdata->cfg_pmic_irq)
 378                 pdata->cfg_pmic_irq();
 379
 380         sec_irq_init(sec_pmic);
 381
 382         pm_runtime_set_active(sec_pmic->dev);
 383
 384         switch (sec_pmic->device_type) {
 385         case S5M8751X:
 386                 sec_devs = s5m8751_devs;
 387                 num_sec_devs = ARRAY_SIZE(s5m8751_devs);
 388                 break;
 389         case S5M8763X:
 390                 sec_devs = s5m8763_devs;
 391                 num_sec_devs = ARRAY_SIZE(s5m8763_devs);
 392                 break;
 393         case S5M8767X:
 394                 sec_devs = s5m8767_devs;
 395                 num_sec_devs = ARRAY_SIZE(s5m8767_devs);
 396                 break;
 397         case S2MPA01:
 398                 sec_devs = s2mpa01_devs;
 399                 num_sec_devs = ARRAY_SIZE(s2mpa01_devs);
 400                 break;
 401         case S2MPS11X:
 402                 sec_devs = s2mps11_devs;
 403                 num_sec_devs = ARRAY_SIZE(s2mps11_devs);
 404                 break;
 405         case S2MPS13X:
 406                 sec_devs = s2mps13_devs;
 407                 num_sec_devs = ARRAY_SIZE(s2mps13_devs);
 408                 break;
 409         case S2MPS14X:
 410                 sec_devs = s2mps14_devs;
 411                 num_sec_devs = ARRAY_SIZE(s2mps14_devs);
 412                 break;
 413         case S2MPU02:
 414                 sec_devs = s2mpu02_devs;
 415                 num_sec_devs = ARRAY_SIZE(s2mpu02_devs);
 416                 break;
 417         default:
 418                 /* If this happens the probe function is problem */
 419                 BUG();
 420         }
 421         ret = mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, NULL,
 422                               0, NULL);
 423         if (ret)
 424                 goto err_mfd;
 425
 426         device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup);
 427
 428         return ret;
 429
 430 err_mfd:
 431         sec_irq_exit(sec_pmic);
 432         return ret;
 433 }
 434
 435 static int sec_pmic_remove(struct i2c_client *i2c)
 436 {
 437         struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 438
 439         mfd_remove_devices(sec_pmic->dev);
 440         sec_irq_exit(sec_pmic);
 441         return 0;
 442 }
 443
 444 #ifdef CONFIG_PM_SLEEP
 445 static int sec_pmic_suspend(struct device *dev)
 446 {
 447         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 448         struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 449
 450         if (device_may_wakeup(dev))
 451                 enable_irq_wake(sec_pmic->irq);
 452         /*
 453          * PMIC IRQ must be disabled during suspend for RTC alarm
 454          * to work properly.
 455          * When device is woken up from suspend, an
 456          * interrupt occurs before resuming I2C bus controller.
 457          * The interrupt is handled by regmap_irq_thread which tries
 458          * to read RTC registers. This read fails (I2C is still
 459          * suspended) and RTC Alarm interrupt is disabled.
 460          */
 461         disable_irq(sec_pmic->irq);
 462
 463         return 0;
 464 }
 465
 466 static int sec_pmic_resume(struct device *dev)
 467 {
 468         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 469         struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 470
 471         if (device_may_wakeup(dev))
 472                 disable_irq_wake(sec_pmic->irq);
 473         enable_irq(sec_pmic->irq);
 474
 475         return 0;
 476 }
 477 #endif /* CONFIG_PM_SLEEP */
 478
 479 static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume);
 480
 481 static const struct i2c_device_id sec_pmic_id[] = {
 482         { "sec_pmic", 0 },
 483         { }
 484 };
 485 MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
 486
 487 static struct i2c_driver sec_pmic_driver = {
 488         .driver = {
 489                    .name = "sec_pmic",
 490                    .owner = THIS_MODULE,
 491                    .pm = &sec_pmic_pm_ops,
 492                    .of_match_table = of_match_ptr(sec_dt_match),
 493         },
 494         .probe = sec_pmic_probe,
 495         .remove = sec_pmic_remove,
 496         .id_table = sec_pmic_id,
 497 };
 498
 499 static int __init sec_pmic_init(void)
 500 {
 501         return i2c_add_driver(&sec_pmic_driver);
 502 }
 503
 504 subsys_initcall(sec_pmic_init);
 505
 506 static void __exit sec_pmic_exit(void)
 507 {
 508         i2c_del_driver(&sec_pmic_driver);
 509 }
 510 module_exit(sec_pmic_exit);
 511
 512 MODULE_AUTHOR("Sangbeom Kim <[email protected]>");
 513 MODULE_DESCRIPTION("Core support for the S5M MFD");
 514 MODULE_LICENSE("GPL");