linux/drivers/mfd/max8997.c
<<
>>
Prefs
   1/*
   2 * max8997.c - mfd core driver for the Maxim 8966 and 8997
   3 *
   4 * Copyright (C) 2011 Samsung Electronics
   5 * MyungJoo Ham <myungjoo.ham@smasung.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 as published by
   9 * the Free Software Foundation; either version 2 of the License, or
  10 * (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License
  18 * along with this program; if not, write to the Free Software
  19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20 *
  21 * This driver is based on max8998.c
  22 */
  23
  24#include <linux/slab.h>
  25#include <linux/i2c.h>
  26#include <linux/interrupt.h>
  27#include <linux/pm_runtime.h>
  28#include <linux/module.h>
  29#include <linux/mutex.h>
  30#include <linux/mfd/core.h>
  31#include <linux/mfd/max8997.h>
  32#include <linux/mfd/max8997-private.h>
  33
  34#define I2C_ADDR_PMIC   (0xCC >> 1)
  35#define I2C_ADDR_MUIC   (0x4A >> 1)
  36#define I2C_ADDR_BATTERY        (0x6C >> 1)
  37#define I2C_ADDR_RTC    (0x0C >> 1)
  38#define I2C_ADDR_HAPTIC (0x90 >> 1)
  39
  40static struct mfd_cell max8997_devs[] = {
  41        { .name = "max8997-pmic", },
  42        { .name = "max8997-rtc", },
  43        { .name = "max8997-battery", },
  44        { .name = "max8997-haptic", },
  45        { .name = "max8997-muic", },
  46        { .name = "max8997-led", .id = 1 },
  47        { .name = "max8997-led", .id = 2 },
  48};
  49
  50int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
  51{
  52        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  53        int ret;
  54
  55        mutex_lock(&max8997->iolock);
  56        ret = i2c_smbus_read_byte_data(i2c, reg);
  57        mutex_unlock(&max8997->iolock);
  58        if (ret < 0)
  59                return ret;
  60
  61        ret &= 0xff;
  62        *dest = ret;
  63        return 0;
  64}
  65EXPORT_SYMBOL_GPL(max8997_read_reg);
  66
  67int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
  68{
  69        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  70        int ret;
  71
  72        mutex_lock(&max8997->iolock);
  73        ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
  74        mutex_unlock(&max8997->iolock);
  75        if (ret < 0)
  76                return ret;
  77
  78        return 0;
  79}
  80EXPORT_SYMBOL_GPL(max8997_bulk_read);
  81
  82int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
  83{
  84        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  85        int ret;
  86
  87        mutex_lock(&max8997->iolock);
  88        ret = i2c_smbus_write_byte_data(i2c, reg, value);
  89        mutex_unlock(&max8997->iolock);
  90        return ret;
  91}
  92EXPORT_SYMBOL_GPL(max8997_write_reg);
  93
  94int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
  95{
  96        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
  97        int ret;
  98
  99        mutex_lock(&max8997->iolock);
 100        ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
 101        mutex_unlock(&max8997->iolock);
 102        if (ret < 0)
 103                return ret;
 104
 105        return 0;
 106}
 107EXPORT_SYMBOL_GPL(max8997_bulk_write);
 108
 109int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
 110{
 111        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 112        int ret;
 113
 114        mutex_lock(&max8997->iolock);
 115        ret = i2c_smbus_read_byte_data(i2c, reg);
 116        if (ret >= 0) {
 117                u8 old_val = ret & 0xff;
 118                u8 new_val = (val & mask) | (old_val & (~mask));
 119                ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
 120        }
 121        mutex_unlock(&max8997->iolock);
 122        return ret;
 123}
 124EXPORT_SYMBOL_GPL(max8997_update_reg);
 125
 126static int max8997_i2c_probe(struct i2c_client *i2c,
 127                            const struct i2c_device_id *id)
 128{
 129        struct max8997_dev *max8997;
 130        struct max8997_platform_data *pdata = i2c->dev.platform_data;
 131        int ret = 0;
 132
 133        max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
 134        if (max8997 == NULL)
 135                return -ENOMEM;
 136
 137        i2c_set_clientdata(i2c, max8997);
 138        max8997->dev = &i2c->dev;
 139        max8997->i2c = i2c;
 140        max8997->type = id->driver_data;
 141        max8997->irq = i2c->irq;
 142
 143        if (!pdata)
 144                goto err;
 145
 146        max8997->ono = pdata->ono;
 147
 148        mutex_init(&max8997->iolock);
 149
 150        max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
 151        i2c_set_clientdata(max8997->rtc, max8997);
 152        max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
 153        i2c_set_clientdata(max8997->haptic, max8997);
 154        max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
 155        i2c_set_clientdata(max8997->muic, max8997);
 156
 157        pm_runtime_set_active(max8997->dev);
 158
 159        max8997_irq_init(max8997);
 160
 161        mfd_add_devices(max8997->dev, -1, max8997_devs,
 162                        ARRAY_SIZE(max8997_devs),
 163                        NULL, 0, NULL);
 164
 165        /*
 166         * TODO: enable others (flash, muic, rtc, battery, ...) and
 167         * check the return value
 168         */
 169
 170        if (ret < 0)
 171                goto err_mfd;
 172
 173        /* MAX8997 has a power button input. */
 174        device_init_wakeup(max8997->dev, pdata->wakeup);
 175
 176        return ret;
 177
 178err_mfd:
 179        mfd_remove_devices(max8997->dev);
 180        i2c_unregister_device(max8997->muic);
 181        i2c_unregister_device(max8997->haptic);
 182        i2c_unregister_device(max8997->rtc);
 183err:
 184        kfree(max8997);
 185        return ret;
 186}
 187
 188static int max8997_i2c_remove(struct i2c_client *i2c)
 189{
 190        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 191
 192        mfd_remove_devices(max8997->dev);
 193        i2c_unregister_device(max8997->muic);
 194        i2c_unregister_device(max8997->haptic);
 195        i2c_unregister_device(max8997->rtc);
 196        kfree(max8997);
 197
 198        return 0;
 199}
 200
 201static const struct i2c_device_id max8997_i2c_id[] = {
 202        { "max8997", TYPE_MAX8997 },
 203        { "max8966", TYPE_MAX8966 },
 204        { }
 205};
 206MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
 207
 208static u8 max8997_dumpaddr_pmic[] = {
 209        MAX8997_REG_INT1MSK,
 210        MAX8997_REG_INT2MSK,
 211        MAX8997_REG_INT3MSK,
 212        MAX8997_REG_INT4MSK,
 213        MAX8997_REG_MAINCON1,
 214        MAX8997_REG_MAINCON2,
 215        MAX8997_REG_BUCKRAMP,
 216        MAX8997_REG_BUCK1CTRL,
 217        MAX8997_REG_BUCK1DVS1,
 218        MAX8997_REG_BUCK1DVS2,
 219        MAX8997_REG_BUCK1DVS3,
 220        MAX8997_REG_BUCK1DVS4,
 221        MAX8997_REG_BUCK1DVS5,
 222        MAX8997_REG_BUCK1DVS6,
 223        MAX8997_REG_BUCK1DVS7,
 224        MAX8997_REG_BUCK1DVS8,
 225        MAX8997_REG_BUCK2CTRL,
 226        MAX8997_REG_BUCK2DVS1,
 227        MAX8997_REG_BUCK2DVS2,
 228        MAX8997_REG_BUCK2DVS3,
 229        MAX8997_REG_BUCK2DVS4,
 230        MAX8997_REG_BUCK2DVS5,
 231        MAX8997_REG_BUCK2DVS6,
 232        MAX8997_REG_BUCK2DVS7,
 233        MAX8997_REG_BUCK2DVS8,
 234        MAX8997_REG_BUCK3CTRL,
 235        MAX8997_REG_BUCK3DVS,
 236        MAX8997_REG_BUCK4CTRL,
 237        MAX8997_REG_BUCK4DVS,
 238        MAX8997_REG_BUCK5CTRL,
 239        MAX8997_REG_BUCK5DVS1,
 240        MAX8997_REG_BUCK5DVS2,
 241        MAX8997_REG_BUCK5DVS3,
 242        MAX8997_REG_BUCK5DVS4,
 243        MAX8997_REG_BUCK5DVS5,
 244        MAX8997_REG_BUCK5DVS6,
 245        MAX8997_REG_BUCK5DVS7,
 246        MAX8997_REG_BUCK5DVS8,
 247        MAX8997_REG_BUCK6CTRL,
 248        MAX8997_REG_BUCK6BPSKIPCTRL,
 249        MAX8997_REG_BUCK7CTRL,
 250        MAX8997_REG_BUCK7DVS,
 251        MAX8997_REG_LDO1CTRL,
 252        MAX8997_REG_LDO2CTRL,
 253        MAX8997_REG_LDO3CTRL,
 254        MAX8997_REG_LDO4CTRL,
 255        MAX8997_REG_LDO5CTRL,
 256        MAX8997_REG_LDO6CTRL,
 257        MAX8997_REG_LDO7CTRL,
 258        MAX8997_REG_LDO8CTRL,
 259        MAX8997_REG_LDO9CTRL,
 260        MAX8997_REG_LDO10CTRL,
 261        MAX8997_REG_LDO11CTRL,
 262        MAX8997_REG_LDO12CTRL,
 263        MAX8997_REG_LDO13CTRL,
 264        MAX8997_REG_LDO14CTRL,
 265        MAX8997_REG_LDO15CTRL,
 266        MAX8997_REG_LDO16CTRL,
 267        MAX8997_REG_LDO17CTRL,
 268        MAX8997_REG_LDO18CTRL,
 269        MAX8997_REG_LDO21CTRL,
 270        MAX8997_REG_MBCCTRL1,
 271        MAX8997_REG_MBCCTRL2,
 272        MAX8997_REG_MBCCTRL3,
 273        MAX8997_REG_MBCCTRL4,
 274        MAX8997_REG_MBCCTRL5,
 275        MAX8997_REG_MBCCTRL6,
 276        MAX8997_REG_OTPCGHCVS,
 277        MAX8997_REG_SAFEOUTCTRL,
 278        MAX8997_REG_LBCNFG1,
 279        MAX8997_REG_LBCNFG2,
 280        MAX8997_REG_BBCCTRL,
 281
 282        MAX8997_REG_FLASH1_CUR,
 283        MAX8997_REG_FLASH2_CUR,
 284        MAX8997_REG_MOVIE_CUR,
 285        MAX8997_REG_GSMB_CUR,
 286        MAX8997_REG_BOOST_CNTL,
 287        MAX8997_REG_LEN_CNTL,
 288        MAX8997_REG_FLASH_CNTL,
 289        MAX8997_REG_WDT_CNTL,
 290        MAX8997_REG_MAXFLASH1,
 291        MAX8997_REG_MAXFLASH2,
 292        MAX8997_REG_FLASHSTATUSMASK,
 293
 294        MAX8997_REG_GPIOCNTL1,
 295        MAX8997_REG_GPIOCNTL2,
 296        MAX8997_REG_GPIOCNTL3,
 297        MAX8997_REG_GPIOCNTL4,
 298        MAX8997_REG_GPIOCNTL5,
 299        MAX8997_REG_GPIOCNTL6,
 300        MAX8997_REG_GPIOCNTL7,
 301        MAX8997_REG_GPIOCNTL8,
 302        MAX8997_REG_GPIOCNTL9,
 303        MAX8997_REG_GPIOCNTL10,
 304        MAX8997_REG_GPIOCNTL11,
 305        MAX8997_REG_GPIOCNTL12,
 306
 307        MAX8997_REG_LDO1CONFIG,
 308        MAX8997_REG_LDO2CONFIG,
 309        MAX8997_REG_LDO3CONFIG,
 310        MAX8997_REG_LDO4CONFIG,
 311        MAX8997_REG_LDO5CONFIG,
 312        MAX8997_REG_LDO6CONFIG,
 313        MAX8997_REG_LDO7CONFIG,
 314        MAX8997_REG_LDO8CONFIG,
 315        MAX8997_REG_LDO9CONFIG,
 316        MAX8997_REG_LDO10CONFIG,
 317        MAX8997_REG_LDO11CONFIG,
 318        MAX8997_REG_LDO12CONFIG,
 319        MAX8997_REG_LDO13CONFIG,
 320        MAX8997_REG_LDO14CONFIG,
 321        MAX8997_REG_LDO15CONFIG,
 322        MAX8997_REG_LDO16CONFIG,
 323        MAX8997_REG_LDO17CONFIG,
 324        MAX8997_REG_LDO18CONFIG,
 325        MAX8997_REG_LDO21CONFIG,
 326
 327        MAX8997_REG_DVSOKTIMER1,
 328        MAX8997_REG_DVSOKTIMER2,
 329        MAX8997_REG_DVSOKTIMER4,
 330        MAX8997_REG_DVSOKTIMER5,
 331};
 332
 333static u8 max8997_dumpaddr_muic[] = {
 334        MAX8997_MUIC_REG_INTMASK1,
 335        MAX8997_MUIC_REG_INTMASK2,
 336        MAX8997_MUIC_REG_INTMASK3,
 337        MAX8997_MUIC_REG_CDETCTRL,
 338        MAX8997_MUIC_REG_CONTROL1,
 339        MAX8997_MUIC_REG_CONTROL2,
 340        MAX8997_MUIC_REG_CONTROL3,
 341};
 342
 343static u8 max8997_dumpaddr_haptic[] = {
 344        MAX8997_HAPTIC_REG_CONF1,
 345        MAX8997_HAPTIC_REG_CONF2,
 346        MAX8997_HAPTIC_REG_DRVCONF,
 347        MAX8997_HAPTIC_REG_CYCLECONF1,
 348        MAX8997_HAPTIC_REG_CYCLECONF2,
 349        MAX8997_HAPTIC_REG_SIGCONF1,
 350        MAX8997_HAPTIC_REG_SIGCONF2,
 351        MAX8997_HAPTIC_REG_SIGCONF3,
 352        MAX8997_HAPTIC_REG_SIGCONF4,
 353        MAX8997_HAPTIC_REG_SIGDC1,
 354        MAX8997_HAPTIC_REG_SIGDC2,
 355        MAX8997_HAPTIC_REG_SIGPWMDC1,
 356        MAX8997_HAPTIC_REG_SIGPWMDC2,
 357        MAX8997_HAPTIC_REG_SIGPWMDC3,
 358        MAX8997_HAPTIC_REG_SIGPWMDC4,
 359};
 360
 361static int max8997_freeze(struct device *dev)
 362{
 363        struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 364        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 365        int i;
 366
 367        for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
 368                max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
 369                                &max8997->reg_dump[i]);
 370
 371        for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
 372                max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
 373                                &max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
 374
 375        for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
 376                max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
 377                                &max8997->reg_dump[i + MAX8997_REG_PMIC_END +
 378                                MAX8997_MUIC_REG_END]);
 379
 380        return 0;
 381}
 382
 383static int max8997_restore(struct device *dev)
 384{
 385        struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 386        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 387        int i;
 388
 389        for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
 390                max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
 391                                max8997->reg_dump[i]);
 392
 393        for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
 394                max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
 395                                max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
 396
 397        for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
 398                max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
 399                                max8997->reg_dump[i + MAX8997_REG_PMIC_END +
 400                                MAX8997_MUIC_REG_END]);
 401
 402        return 0;
 403}
 404
 405static int max8997_suspend(struct device *dev)
 406{
 407        struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 408        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 409
 410        if (device_may_wakeup(dev))
 411                irq_set_irq_wake(max8997->irq, 1);
 412        return 0;
 413}
 414
 415static int max8997_resume(struct device *dev)
 416{
 417        struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 418        struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
 419
 420        if (device_may_wakeup(dev))
 421                irq_set_irq_wake(max8997->irq, 0);
 422        return max8997_irq_resume(max8997);
 423}
 424
 425static const struct dev_pm_ops max8997_pm = {
 426        .suspend = max8997_suspend,
 427        .resume = max8997_resume,
 428        .freeze = max8997_freeze,
 429        .restore = max8997_restore,
 430};
 431
 432static struct i2c_driver max8997_i2c_driver = {
 433        .driver = {
 434                   .name = "max8997",
 435                   .owner = THIS_MODULE,
 436                   .pm = &max8997_pm,
 437        },
 438        .probe = max8997_i2c_probe,
 439        .remove = max8997_i2c_remove,
 440        .id_table = max8997_i2c_id,
 441};
 442
 443static int __init max8997_i2c_init(void)
 444{
 445        return i2c_add_driver(&max8997_i2c_driver);
 446}
 447/* init early so consumer devices can complete system boot */
 448subsys_initcall(max8997_i2c_init);
 449
 450static void __exit max8997_i2c_exit(void)
 451{
 452        i2c_del_driver(&max8997_i2c_driver);
 453}
 454module_exit(max8997_i2c_exit);
 455
 456MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
 457MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
 458MODULE_LICENSE("GPL");
 459
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.