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/err.h> 25 #include <linux/slab.h> 26 #include <linux/i2c.h> 27 #include <linux/of_irq.h> 28 #include <linux/interrupt.h> 29 #include <linux/pm_runtime.h> 30 #include <linux/module.h> 31 #include <linux/mutex.h> 32 #include <linux/mfd/core.h> 33 #include <linux/mfd/max8997.h> 34 #include <linux/mfd/max8997-private.h> 35 36 #define I2C_ADDR_PMIC (0xCC >> 1) 37 #define I2C_ADDR_MUIC (0x4A >> 1) 38 #define I2C_ADDR_BATTERY (0x6C >> 1) 39 #define I2C_ADDR_RTC (0x0C >> 1) 40 #define I2C_ADDR_HAPTIC (0x90 >> 1) 41 42 static struct mfd_cell max8997_devs[] = { 43 { .name = "max8997-pmic", }, 44 { .name = "max8997-rtc", }, 45 { .name = "max8997-battery", }, 46 { .name = "max8997-haptic", }, 47 { .name = "max8997-muic", }, 48 { .name = "max8997-led", .id = 1 }, 49 { .name = "max8997-led", .id = 2 }, 50 }; 51 52 #ifdef CONFIG_OF 53 static struct of_device_id max8997_pmic_dt_match[] = { 54 { .compatible = "maxim,max8997-pmic", .data = TYPE_MAX8997 }, 55 {}, 56 }; 57 #endif 58 59 int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) 60 { 61 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 62 int ret; 63 64 mutex_lock(&max8997->iolock); 65 ret = i2c_smbus_read_byte_data(i2c, reg); 66 mutex_unlock(&max8997->iolock); 67 if (ret < 0) 68 return ret; 69 70 ret &= 0xff; 71 *dest = ret; 72 return 0; 73 } 74 EXPORT_SYMBOL_GPL(max8997_read_reg); 75 76 int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) 77 { 78 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 79 int ret; 80 81 mutex_lock(&max8997->iolock); 82 ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); 83 mutex_unlock(&max8997->iolock); 84 if (ret < 0) 85 return ret; 86 87 return 0; 88 } 89 EXPORT_SYMBOL_GPL(max8997_bulk_read); 90 91 int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value) 92 { 93 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 94 int ret; 95 96 mutex_lock(&max8997->iolock); 97 ret = i2c_smbus_write_byte_data(i2c, reg, value); 98 mutex_unlock(&max8997->iolock); 99 return ret; 100 } 101 EXPORT_SYMBOL_GPL(max8997_write_reg); 102 103 int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) 104 { 105 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 106 int ret; 107 108 mutex_lock(&max8997->iolock); 109 ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); 110 mutex_unlock(&max8997->iolock); 111 if (ret < 0) 112 return ret; 113 114 return 0; 115 } 116 EXPORT_SYMBOL_GPL(max8997_bulk_write); 117 118 int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) 119 { 120 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 121 int ret; 122 123 mutex_lock(&max8997->iolock); 124 ret = i2c_smbus_read_byte_data(i2c, reg); 125 if (ret >= 0) { 126 u8 old_val = ret & 0xff; 127 u8 new_val = (val & mask) | (old_val & (~mask)); 128 ret = i2c_smbus_write_byte_data(i2c, reg, new_val); 129 } 130 mutex_unlock(&max8997->iolock); 131 return ret; 132 } 133 EXPORT_SYMBOL_GPL(max8997_update_reg); 134 135 #ifdef CONFIG_OF 136 /* 137 * Only the common platform data elements for max8997 are parsed here from the 138 * device tree. Other sub-modules of max8997 such as pmic, rtc and others have 139 * to parse their own platform data elements from device tree. 140 * 141 * The max8997 platform data structure is instantiated here and the drivers for 142 * the sub-modules need not instantiate another instance while parsing their 143 * platform data. 144 */ 145 static struct max8997_platform_data *max8997_i2c_parse_dt_pdata( 146 struct device *dev) 147 { 148 struct max8997_platform_data *pd; 149 150 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 151 if (!pd) { 152 dev_err(dev, "could not allocate memory for pdata\n"); 153 return ERR_PTR(-ENOMEM); 154 } 155 156 pd->ono = irq_of_parse_and_map(dev->of_node, 1); 157 158 /* 159 * ToDo: the 'wakeup' member in the platform data is more of a linux 160 * specfic information. Hence, there is no binding for that yet and 161 * not parsed here. 162 */ 163 164 return pd; 165 } 166 #else 167 static struct max8997_platform_data *max8997_i2c_parse_dt_pdata( 168 struct device *dev) 169 { 170 return 0; 171 } 172 #endif 173 174 static inline int max8997_i2c_get_driver_data(struct i2c_client *i2c, 175 const struct i2c_device_id *id) 176 { 177 #ifdef CONFIG_OF 178 if (i2c->dev.of_node) { 179 const struct of_device_id *match; 180 match = of_match_node(max8997_pmic_dt_match, i2c->dev.of_node); 181 return (int)match->data; 182 } 183 #endif 184 return (int)id->driver_data; 185 } 186 187 static int max8997_i2c_probe(struct i2c_client *i2c, 188 const struct i2c_device_id *id) 189 { 190 struct max8997_dev *max8997; 191 struct max8997_platform_data *pdata = i2c->dev.platform_data; 192 int ret = 0; 193 194 max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL); 195 if (max8997 == NULL) 196 return -ENOMEM; 197 198 i2c_set_clientdata(i2c, max8997); 199 max8997->dev = &i2c->dev; 200 max8997->i2c = i2c; 201 max8997->type = max8997_i2c_get_driver_data(i2c, id); 202 max8997->irq = i2c->irq; 203 204 if (max8997->dev->of_node) { 205 pdata = max8997_i2c_parse_dt_pdata(max8997->dev); 206 if (IS_ERR(pdata)) { 207 ret = PTR_ERR(pdata); 208 goto err; 209 } 210 } 211 212 if (!pdata) 213 goto err; 214 215 max8997->pdata = pdata; 216 max8997->ono = pdata->ono; 217 218 mutex_init(&max8997->iolock); 219 220 max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); 221 i2c_set_clientdata(max8997->rtc, max8997); 222 max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); 223 i2c_set_clientdata(max8997->haptic, max8997); 224 max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); 225 i2c_set_clientdata(max8997->muic, max8997); 226 227 pm_runtime_set_active(max8997->dev); 228 229 max8997_irq_init(max8997); 230 231 mfd_add_devices(max8997->dev, -1, max8997_devs, 232 ARRAY_SIZE(max8997_devs), 233 NULL, 0, NULL); 234 235 /* 236 * TODO: enable others (flash, muic, rtc, battery, ...) and 237 * check the return value 238 */ 239 240 if (ret < 0) 241 goto err_mfd; 242 243 /* MAX8997 has a power button input. */ 244 device_init_wakeup(max8997->dev, pdata->wakeup); 245 246 return ret; 247 248 err_mfd: 249 mfd_remove_devices(max8997->dev); 250 i2c_unregister_device(max8997->muic); 251 i2c_unregister_device(max8997->haptic); 252 i2c_unregister_device(max8997->rtc); 253 err: 254 kfree(max8997); 255 return ret; 256 } 257 258 static int max8997_i2c_remove(struct i2c_client *i2c) 259 { 260 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 261 262 mfd_remove_devices(max8997->dev); 263 i2c_unregister_device(max8997->muic); 264 i2c_unregister_device(max8997->haptic); 265 i2c_unregister_device(max8997->rtc); 266 kfree(max8997); 267 268 return 0; 269 } 270 271 static const struct i2c_device_id max8997_i2c_id[] = { 272 { "max8997", TYPE_MAX8997 }, 273 { "max8966", TYPE_MAX8966 }, 274 { } 275 }; 276 MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); 277 278 static u8 max8997_dumpaddr_pmic[] = { 279 MAX8997_REG_INT1MSK, 280 MAX8997_REG_INT2MSK, 281 MAX8997_REG_INT3MSK, 282 MAX8997_REG_INT4MSK, 283 MAX8997_REG_MAINCON1, 284 MAX8997_REG_MAINCON2, 285 MAX8997_REG_BUCKRAMP, 286 MAX8997_REG_BUCK1CTRL, 287 MAX8997_REG_BUCK1DVS1, 288 MAX8997_REG_BUCK1DVS2, 289 MAX8997_REG_BUCK1DVS3, 290 MAX8997_REG_BUCK1DVS4, 291 MAX8997_REG_BUCK1DVS5, 292 MAX8997_REG_BUCK1DVS6, 293 MAX8997_REG_BUCK1DVS7, 294 MAX8997_REG_BUCK1DVS8, 295 MAX8997_REG_BUCK2CTRL, 296 MAX8997_REG_BUCK2DVS1, 297 MAX8997_REG_BUCK2DVS2, 298 MAX8997_REG_BUCK2DVS3, 299 MAX8997_REG_BUCK2DVS4, 300 MAX8997_REG_BUCK2DVS5, 301 MAX8997_REG_BUCK2DVS6, 302 MAX8997_REG_BUCK2DVS7, 303 MAX8997_REG_BUCK2DVS8, 304 MAX8997_REG_BUCK3CTRL, 305 MAX8997_REG_BUCK3DVS, 306 MAX8997_REG_BUCK4CTRL, 307 MAX8997_REG_BUCK4DVS, 308 MAX8997_REG_BUCK5CTRL, 309 MAX8997_REG_BUCK5DVS1, 310 MAX8997_REG_BUCK5DVS2, 311 MAX8997_REG_BUCK5DVS3, 312 MAX8997_REG_BUCK5DVS4, 313 MAX8997_REG_BUCK5DVS5, 314 MAX8997_REG_BUCK5DVS6, 315 MAX8997_REG_BUCK5DVS7, 316 MAX8997_REG_BUCK5DVS8, 317 MAX8997_REG_BUCK6CTRL, 318 MAX8997_REG_BUCK6BPSKIPCTRL, 319 MAX8997_REG_BUCK7CTRL, 320 MAX8997_REG_BUCK7DVS, 321 MAX8997_REG_LDO1CTRL, 322 MAX8997_REG_LDO2CTRL, 323 MAX8997_REG_LDO3CTRL, 324 MAX8997_REG_LDO4CTRL, 325 MAX8997_REG_LDO5CTRL, 326 MAX8997_REG_LDO6CTRL, 327 MAX8997_REG_LDO7CTRL, 328 MAX8997_REG_LDO8CTRL, 329 MAX8997_REG_LDO9CTRL, 330 MAX8997_REG_LDO10CTRL, 331 MAX8997_REG_LDO11CTRL, 332 MAX8997_REG_LDO12CTRL, 333 MAX8997_REG_LDO13CTRL, 334 MAX8997_REG_LDO14CTRL, 335 MAX8997_REG_LDO15CTRL, 336 MAX8997_REG_LDO16CTRL, 337 MAX8997_REG_LDO17CTRL, 338 MAX8997_REG_LDO18CTRL, 339 MAX8997_REG_LDO21CTRL, 340 MAX8997_REG_MBCCTRL1, 341 MAX8997_REG_MBCCTRL2, 342 MAX8997_REG_MBCCTRL3, 343 MAX8997_REG_MBCCTRL4, 344 MAX8997_REG_MBCCTRL5, 345 MAX8997_REG_MBCCTRL6, 346 MAX8997_REG_OTPCGHCVS, 347 MAX8997_REG_SAFEOUTCTRL, 348 MAX8997_REG_LBCNFG1, 349 MAX8997_REG_LBCNFG2, 350 MAX8997_REG_BBCCTRL, 351 352 MAX8997_REG_FLASH1_CUR, 353 MAX8997_REG_FLASH2_CUR, 354 MAX8997_REG_MOVIE_CUR, 355 MAX8997_REG_GSMB_CUR, 356 MAX8997_REG_BOOST_CNTL, 357 MAX8997_REG_LEN_CNTL, 358 MAX8997_REG_FLASH_CNTL, 359 MAX8997_REG_WDT_CNTL, 360 MAX8997_REG_MAXFLASH1, 361 MAX8997_REG_MAXFLASH2, 362 MAX8997_REG_FLASHSTATUSMASK, 363 364 MAX8997_REG_GPIOCNTL1, 365 MAX8997_REG_GPIOCNTL2, 366 MAX8997_REG_GPIOCNTL3, 367 MAX8997_REG_GPIOCNTL4, 368 MAX8997_REG_GPIOCNTL5, 369 MAX8997_REG_GPIOCNTL6, 370 MAX8997_REG_GPIOCNTL7, 371 MAX8997_REG_GPIOCNTL8, 372 MAX8997_REG_GPIOCNTL9, 373 MAX8997_REG_GPIOCNTL10, 374 MAX8997_REG_GPIOCNTL11, 375 MAX8997_REG_GPIOCNTL12, 376 377 MAX8997_REG_LDO1CONFIG, 378 MAX8997_REG_LDO2CONFIG, 379 MAX8997_REG_LDO3CONFIG, 380 MAX8997_REG_LDO4CONFIG, 381 MAX8997_REG_LDO5CONFIG, 382 MAX8997_REG_LDO6CONFIG, 383 MAX8997_REG_LDO7CONFIG, 384 MAX8997_REG_LDO8CONFIG, 385 MAX8997_REG_LDO9CONFIG, 386 MAX8997_REG_LDO10CONFIG, 387 MAX8997_REG_LDO11CONFIG, 388 MAX8997_REG_LDO12CONFIG, 389 MAX8997_REG_LDO13CONFIG, 390 MAX8997_REG_LDO14CONFIG, 391 MAX8997_REG_LDO15CONFIG, 392 MAX8997_REG_LDO16CONFIG, 393 MAX8997_REG_LDO17CONFIG, 394 MAX8997_REG_LDO18CONFIG, 395 MAX8997_REG_LDO21CONFIG, 396 397 MAX8997_REG_DVSOKTIMER1, 398 MAX8997_REG_DVSOKTIMER2, 399 MAX8997_REG_DVSOKTIMER4, 400 MAX8997_REG_DVSOKTIMER5, 401 }; 402 403 static u8 max8997_dumpaddr_muic[] = { 404 MAX8997_MUIC_REG_INTMASK1, 405 MAX8997_MUIC_REG_INTMASK2, 406 MAX8997_MUIC_REG_INTMASK3, 407 MAX8997_MUIC_REG_CDETCTRL, 408 MAX8997_MUIC_REG_CONTROL1, 409 MAX8997_MUIC_REG_CONTROL2, 410 MAX8997_MUIC_REG_CONTROL3, 411 }; 412 413 static u8 max8997_dumpaddr_haptic[] = { 414 MAX8997_HAPTIC_REG_CONF1, 415 MAX8997_HAPTIC_REG_CONF2, 416 MAX8997_HAPTIC_REG_DRVCONF, 417 MAX8997_HAPTIC_REG_CYCLECONF1, 418 MAX8997_HAPTIC_REG_CYCLECONF2, 419 MAX8997_HAPTIC_REG_SIGCONF1, 420 MAX8997_HAPTIC_REG_SIGCONF2, 421 MAX8997_HAPTIC_REG_SIGCONF3, 422 MAX8997_HAPTIC_REG_SIGCONF4, 423 MAX8997_HAPTIC_REG_SIGDC1, 424 MAX8997_HAPTIC_REG_SIGDC2, 425 MAX8997_HAPTIC_REG_SIGPWMDC1, 426 MAX8997_HAPTIC_REG_SIGPWMDC2, 427 MAX8997_HAPTIC_REG_SIGPWMDC3, 428 MAX8997_HAPTIC_REG_SIGPWMDC4, 429 }; 430 431 static int max8997_freeze(struct device *dev) 432 { 433 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 434 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 435 int i; 436 437 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++) 438 max8997_read_reg(i2c, max8997_dumpaddr_pmic[i], 439 &max8997->reg_dump[i]); 440 441 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++) 442 max8997_read_reg(i2c, max8997_dumpaddr_muic[i], 443 &max8997->reg_dump[i + MAX8997_REG_PMIC_END]); 444 445 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++) 446 max8997_read_reg(i2c, max8997_dumpaddr_haptic[i], 447 &max8997->reg_dump[i + MAX8997_REG_PMIC_END + 448 MAX8997_MUIC_REG_END]); 449 450 return 0; 451 } 452 453 static int max8997_restore(struct device *dev) 454 { 455 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 456 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 457 int i; 458 459 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++) 460 max8997_write_reg(i2c, max8997_dumpaddr_pmic[i], 461 max8997->reg_dump[i]); 462 463 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++) 464 max8997_write_reg(i2c, max8997_dumpaddr_muic[i], 465 max8997->reg_dump[i + MAX8997_REG_PMIC_END]); 466 467 for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++) 468 max8997_write_reg(i2c, max8997_dumpaddr_haptic[i], 469 max8997->reg_dump[i + MAX8997_REG_PMIC_END + 470 MAX8997_MUIC_REG_END]); 471 472 return 0; 473 } 474 475 static int max8997_suspend(struct device *dev) 476 { 477 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 478 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 479 480 if (device_may_wakeup(dev)) 481 irq_set_irq_wake(max8997->irq, 1); 482 return 0; 483 } 484 485 static int max8997_resume(struct device *dev) 486 { 487 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 488 struct max8997_dev *max8997 = i2c_get_clientdata(i2c); 489 490 if (device_may_wakeup(dev)) 491 irq_set_irq_wake(max8997->irq, 0); 492 return max8997_irq_resume(max8997); 493 } 494 495 static const struct dev_pm_ops max8997_pm = { 496 .suspend = max8997_suspend, 497 .resume = max8997_resume, 498 .freeze = max8997_freeze, 499 .restore = max8997_restore, 500 }; 501 502 static struct i2c_driver max8997_i2c_driver = { 503 .driver = { 504 .name = "max8997", 505 .owner = THIS_MODULE, 506 .pm = &max8997_pm, 507 .of_match_table = of_match_ptr(max8997_pmic_dt_match), 508 }, 509 .probe = max8997_i2c_probe, 510 .remove = max8997_i2c_remove, 511 .id_table = max8997_i2c_id, 512 }; 513 514 static int __init max8997_i2c_init(void) 515 { 516 return i2c_add_driver(&max8997_i2c_driver); 517 } 518 /* init early so consumer devices can complete system boot */ 519 subsys_initcall(max8997_i2c_init); 520 521 static void __exit max8997_i2c_exit(void) 522 { 523 i2c_del_driver(&max8997_i2c_driver); 524 } 525 module_exit(max8997_i2c_exit); 526 527 MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver"); 528 MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>"); 529 MODULE_LICENSE("GPL"); 530