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