1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // Copyright (c) 2012 Samsung Electronics Co., Ltd 4 // http://www.samsung.com 5 6 #include <linux/module.h> 7 #include <linux/moduleparam.h> 8 #include <linux/init.h> 9 #include <linux/err.h> 10 #include <linux/slab.h> 11 #include <linux/i2c.h> 12 #include <linux/of.h> 13 #include <linux/of_device.h> 14 #include <linux/of_irq.h> 15 #include <linux/interrupt.h> 16 #include <linux/pm_runtime.h> 17 #include <linux/mutex.h> 18 #include <linux/mfd/core.h> 19 #include <linux/mfd/samsung/core.h> 20 #include <linux/mfd/samsung/irq.h> 21 #include <linux/mfd/samsung/s2mpa01.h> 22 #include <linux/mfd/samsung/s2mps11.h> 23 #include <linux/mfd/samsung/s2mps13.h> 24 #include <linux/mfd/samsung/s2mps14.h> 25 #include <linux/mfd/samsung/s2mps15.h> 26 #include <linux/mfd/samsung/s2mpu02.h> 27 #include <linux/mfd/samsung/s5m8763.h> 28 #include <linux/mfd/samsung/s5m8767.h> 29 #include <linux/regmap.h> 30 31 static const struct mfd_cell s5m8751_devs[] = { 32 { .name = "s5m8751-pmic", }, 33 { .name = "s5m-charger", }, 34 { .name = "s5m8751-codec", }, 35 }; 36 37 static const struct mfd_cell s5m8763_devs[] = { 38 { .name = "s5m8763-pmic", }, 39 { .name = "s5m-rtc", }, 40 { .name = "s5m-charger", }, 41 }; 42 43 static const struct mfd_cell s5m8767_devs[] = { 44 { .name = "s5m8767-pmic", }, 45 { .name = "s5m-rtc", }, 46 { 47 .name = "s5m8767-clk", 48 .of_compatible = "samsung,s5m8767-clk", 49 }, 50 }; 51 52 static const struct mfd_cell s2mps11_devs[] = { 53 { .name = "s2mps11-regulator", }, 54 { .name = "s2mps14-rtc", }, 55 { 56 .name = "s2mps11-clk", 57 .of_compatible = "samsung,s2mps11-clk", 58 }, 59 }; 60 61 static const struct mfd_cell s2mps13_devs[] = { 62 { .name = "s2mps13-regulator", }, 63 { .name = "s2mps13-rtc", }, 64 { 65 .name = "s2mps13-clk", 66 .of_compatible = "samsung,s2mps13-clk", 67 }, 68 }; 69 70 static const struct mfd_cell s2mps14_devs[] = { 71 { .name = "s2mps14-regulator", }, 72 { .name = "s2mps14-rtc", }, 73 { 74 .name = "s2mps14-clk", 75 .of_compatible = "samsung,s2mps14-clk", 76 }, 77 }; 78 79 static const struct mfd_cell s2mps15_devs[] = { 80 { .name = "s2mps15-regulator", }, 81 { .name = "s2mps15-rtc", }, 82 { 83 .name = "s2mps13-clk", 84 .of_compatible = "samsung,s2mps13-clk", 85 }, 86 }; 87 88 static const struct mfd_cell s2mpa01_devs[] = { 89 { .name = "s2mpa01-pmic", }, 90 { .name = "s2mps14-rtc", }, 91 }; 92 93 static const struct mfd_cell s2mpu02_devs[] = { 94 { .name = "s2mpu02-regulator", }, 95 }; 96 97 static const struct of_device_id sec_dt_match[] = { 98 { 99 .compatible = "samsung,s5m8767-pmic", 100 .data = (void *)S5M8767X, 101 }, { 102 .compatible = "samsung,s2mps11-pmic", 103 .data = (void *)S2MPS11X, 104 }, { 105 .compatible = "samsung,s2mps13-pmic", 106 .data = (void *)S2MPS13X, 107 }, { 108 .compatible = "samsung,s2mps14-pmic", 109 .data = (void *)S2MPS14X, 110 }, { 111 .compatible = "samsung,s2mps15-pmic", 112 .data = (void *)S2MPS15X, 113 }, { 114 .compatible = "samsung,s2mpa01-pmic", 115 .data = (void *)S2MPA01, 116 }, { 117 .compatible = "samsung,s2mpu02-pmic", 118 .data = (void *)S2MPU02, 119 }, { 120 /* Sentinel */ 121 }, 122 }; 123 MODULE_DEVICE_TABLE(of, sec_dt_match); 124 125 static bool s2mpa01_volatile(struct device *dev, unsigned int reg) 126 { 127 switch (reg) { 128 case S2MPA01_REG_INT1M: 129 case S2MPA01_REG_INT2M: 130 case S2MPA01_REG_INT3M: 131 return false; 132 default: 133 return true; 134 } 135 } 136 137 static bool s2mps11_volatile(struct device *dev, unsigned int reg) 138 { 139 switch (reg) { 140 case S2MPS11_REG_INT1M: 141 case S2MPS11_REG_INT2M: 142 case S2MPS11_REG_INT3M: 143 return false; 144 default: 145 return true; 146 } 147 } 148 149 static bool s2mpu02_volatile(struct device *dev, unsigned int reg) 150 { 151 switch (reg) { 152 case S2MPU02_REG_INT1M: 153 case S2MPU02_REG_INT2M: 154 case S2MPU02_REG_INT3M: 155 return false; 156 default: 157 return true; 158 } 159 } 160 161 static bool s5m8763_volatile(struct device *dev, unsigned int reg) 162 { 163 switch (reg) { 164 case S5M8763_REG_IRQM1: 165 case S5M8763_REG_IRQM2: 166 case S5M8763_REG_IRQM3: 167 case S5M8763_REG_IRQM4: 168 return false; 169 default: 170 return true; 171 } 172 } 173 174 static const struct regmap_config sec_regmap_config = { 175 .reg_bits = 8, 176 .val_bits = 8, 177 }; 178 179 static const struct regmap_config s2mpa01_regmap_config = { 180 .reg_bits = 8, 181 .val_bits = 8, 182 183 .max_register = S2MPA01_REG_LDO_OVCB4, 184 .volatile_reg = s2mpa01_volatile, 185 .cache_type = REGCACHE_FLAT, 186 }; 187 188 static const struct regmap_config s2mps11_regmap_config = { 189 .reg_bits = 8, 190 .val_bits = 8, 191 192 .max_register = S2MPS11_REG_L38CTRL, 193 .volatile_reg = s2mps11_volatile, 194 .cache_type = REGCACHE_FLAT, 195 }; 196 197 static const struct regmap_config s2mps13_regmap_config = { 198 .reg_bits = 8, 199 .val_bits = 8, 200 201 .max_register = S2MPS13_REG_LDODSCH5, 202 .volatile_reg = s2mps11_volatile, 203 .cache_type = REGCACHE_FLAT, 204 }; 205 206 static const struct regmap_config s2mps14_regmap_config = { 207 .reg_bits = 8, 208 .val_bits = 8, 209 210 .max_register = S2MPS14_REG_LDODSCH3, 211 .volatile_reg = s2mps11_volatile, 212 .cache_type = REGCACHE_FLAT, 213 }; 214 215 static const struct regmap_config s2mps15_regmap_config = { 216 .reg_bits = 8, 217 .val_bits = 8, 218 219 .max_register = S2MPS15_REG_LDODSCH4, 220 .volatile_reg = s2mps11_volatile, 221 .cache_type = REGCACHE_FLAT, 222 }; 223 224 static const struct regmap_config s2mpu02_regmap_config = { 225 .reg_bits = 8, 226 .val_bits = 8, 227 228 .max_register = S2MPU02_REG_DVSDATA, 229 .volatile_reg = s2mpu02_volatile, 230 .cache_type = REGCACHE_FLAT, 231 }; 232 233 static const struct regmap_config s5m8763_regmap_config = { 234 .reg_bits = 8, 235 .val_bits = 8, 236 237 .max_register = S5M8763_REG_LBCNFG2, 238 .volatile_reg = s5m8763_volatile, 239 .cache_type = REGCACHE_FLAT, 240 }; 241 242 static const struct regmap_config s5m8767_regmap_config = { 243 .reg_bits = 8, 244 .val_bits = 8, 245 246 .max_register = S5M8767_REG_LDO28CTRL, 247 .volatile_reg = s2mps11_volatile, 248 .cache_type = REGCACHE_FLAT, 249 }; 250 251 static void sec_pmic_dump_rev(struct sec_pmic_dev *sec_pmic) 252 { 253 unsigned int val; 254 255 /* For each device type, the REG_ID is always the first register */ 256 if (!regmap_read(sec_pmic->regmap_pmic, S2MPS11_REG_ID, &val)) 257 dev_dbg(sec_pmic->dev, "Revision: 0x%x\n", val); 258 } 259 260 static void sec_pmic_configure(struct sec_pmic_dev *sec_pmic) 261 { 262 int err; 263 264 if (sec_pmic->device_type != S2MPS13X) 265 return; 266 267 if (sec_pmic->pdata->disable_wrstbi) { 268 /* 269 * If WRSTBI pin is pulled down this feature must be disabled 270 * because each Suspend to RAM will trigger buck voltage reset 271 * to default values. 272 */ 273 err = regmap_update_bits(sec_pmic->regmap_pmic, 274 S2MPS13_REG_WRSTBI, 275 S2MPS13_REG_WRSTBI_MASK, 0x0); 276 if (err) 277 dev_warn(sec_pmic->dev, 278 "Cannot initialize WRSTBI config: %d\n", 279 err); 280 } 281 } 282 283 /* 284 * Only the common platform data elements for s5m8767 are parsed here from the 285 * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and 286 * others have to parse their own platform data elements from device tree. 287 * 288 * The s5m8767 platform data structure is instantiated here and the drivers for 289 * the sub-modules need not instantiate another instance while parsing their 290 * platform data. 291 */ 292 static struct sec_platform_data * 293 sec_pmic_i2c_parse_dt_pdata(struct device *dev) 294 { 295 struct sec_platform_data *pd; 296 297 pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 298 if (!pd) 299 return ERR_PTR(-ENOMEM); 300 301 /* 302 * ToDo: the 'wakeup' member in the platform data is more of a linux 303 * specfic information. Hence, there is no binding for that yet and 304 * not parsed here. 305 */ 306 307 pd->manual_poweroff = of_property_read_bool(dev->of_node, 308 "samsung,s2mps11-acokb-ground"); 309 pd->disable_wrstbi = of_property_read_bool(dev->of_node, 310 "samsung,s2mps11-wrstbi-ground"); 311 return pd; 312 } 313 314 static int sec_pmic_probe(struct i2c_client *i2c, 315 const struct i2c_device_id *id) 316 { 317 const struct regmap_config *regmap; 318 struct sec_platform_data *pdata; 319 const struct mfd_cell *sec_devs; 320 struct sec_pmic_dev *sec_pmic; 321 int ret, num_sec_devs; 322 323 sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev), 324 GFP_KERNEL); 325 if (sec_pmic == NULL) 326 return -ENOMEM; 327 328 i2c_set_clientdata(i2c, sec_pmic); 329 sec_pmic->dev = &i2c->dev; 330 sec_pmic->i2c = i2c; 331 sec_pmic->irq = i2c->irq; 332 333 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev); 334 if (IS_ERR(pdata)) { 335 ret = PTR_ERR(pdata); 336 return ret; 337 } 338 339 sec_pmic->device_type = (unsigned long)of_device_get_match_data(sec_pmic->dev); 340 sec_pmic->wakeup = pdata->wakeup; 341 sec_pmic->pdata = pdata; 342 343 switch (sec_pmic->device_type) { 344 case S2MPA01: 345 regmap = &s2mpa01_regmap_config; 346 break; 347 case S2MPS11X: 348 regmap = &s2mps11_regmap_config; 349 break; 350 case S2MPS13X: 351 regmap = &s2mps13_regmap_config; 352 break; 353 case S2MPS14X: 354 regmap = &s2mps14_regmap_config; 355 break; 356 case S2MPS15X: 357 regmap = &s2mps15_regmap_config; 358 break; 359 case S5M8763X: 360 regmap = &s5m8763_regmap_config; 361 break; 362 case S5M8767X: 363 regmap = &s5m8767_regmap_config; 364 break; 365 case S2MPU02: 366 regmap = &s2mpu02_regmap_config; 367 break; 368 default: 369 regmap = &sec_regmap_config; 370 break; 371 } 372 373 sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap); 374 if (IS_ERR(sec_pmic->regmap_pmic)) { 375 ret = PTR_ERR(sec_pmic->regmap_pmic); 376 dev_err(&i2c->dev, "Failed to allocate register map: %d\n", 377 ret); 378 return ret; 379 } 380 381 sec_irq_init(sec_pmic); 382 383 pm_runtime_set_active(sec_pmic->dev); 384 385 switch (sec_pmic->device_type) { 386 case S5M8751X: 387 sec_devs = s5m8751_devs; 388 num_sec_devs = ARRAY_SIZE(s5m8751_devs); 389 break; 390 case S5M8763X: 391 sec_devs = s5m8763_devs; 392 num_sec_devs = ARRAY_SIZE(s5m8763_devs); 393 break; 394 case S5M8767X: 395 sec_devs = s5m8767_devs; 396 num_sec_devs = ARRAY_SIZE(s5m8767_devs); 397 break; 398 case S2MPA01: 399 sec_devs = s2mpa01_devs; 400 num_sec_devs = ARRAY_SIZE(s2mpa01_devs); 401 break; 402 case S2MPS11X: 403 sec_devs = s2mps11_devs; 404 num_sec_devs = ARRAY_SIZE(s2mps11_devs); 405 break; 406 case S2MPS13X: 407 sec_devs = s2mps13_devs; 408 num_sec_devs = ARRAY_SIZE(s2mps13_devs); 409 break; 410 case S2MPS14X: 411 sec_devs = s2mps14_devs; 412 num_sec_devs = ARRAY_SIZE(s2mps14_devs); 413 break; 414 case S2MPS15X: 415 sec_devs = s2mps15_devs; 416 num_sec_devs = ARRAY_SIZE(s2mps15_devs); 417 break; 418 case S2MPU02: 419 sec_devs = s2mpu02_devs; 420 num_sec_devs = ARRAY_SIZE(s2mpu02_devs); 421 break; 422 default: 423 dev_err(&i2c->dev, "Unsupported device type (%lu)\n", 424 sec_pmic->device_type); 425 return -ENODEV; 426 } 427 ret = devm_mfd_add_devices(sec_pmic->dev, -1, sec_devs, num_sec_devs, 428 NULL, 0, NULL); 429 if (ret) 430 return ret; 431 432 device_init_wakeup(sec_pmic->dev, sec_pmic->wakeup); 433 sec_pmic_configure(sec_pmic); 434 sec_pmic_dump_rev(sec_pmic); 435 436 return ret; 437 } 438 439 static void sec_pmic_shutdown(struct i2c_client *i2c) 440 { 441 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 442 unsigned int reg, mask; 443 444 if (!sec_pmic->pdata->manual_poweroff) 445 return; 446 447 switch (sec_pmic->device_type) { 448 case S2MPS11X: 449 reg = S2MPS11_REG_CTRL1; 450 mask = S2MPS11_CTRL1_PWRHOLD_MASK; 451 break; 452 default: 453 /* 454 * Currently only one board with S2MPS11 needs this, so just 455 * ignore the rest. 456 */ 457 dev_warn(sec_pmic->dev, 458 "Unsupported device %lu for manual power off\n", 459 sec_pmic->device_type); 460 return; 461 } 462 463 regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, 0); 464 } 465 466 #ifdef CONFIG_PM_SLEEP 467 static int sec_pmic_suspend(struct device *dev) 468 { 469 struct i2c_client *i2c = to_i2c_client(dev); 470 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 471 472 if (device_may_wakeup(dev)) 473 enable_irq_wake(sec_pmic->irq); 474 /* 475 * PMIC IRQ must be disabled during suspend for RTC alarm 476 * to work properly. 477 * When device is woken up from suspend, an 478 * interrupt occurs before resuming I2C bus controller. 479 * The interrupt is handled by regmap_irq_thread which tries 480 * to read RTC registers. This read fails (I2C is still 481 * suspended) and RTC Alarm interrupt is disabled. 482 */ 483 disable_irq(sec_pmic->irq); 484 485 return 0; 486 } 487 488 static int sec_pmic_resume(struct device *dev) 489 { 490 struct i2c_client *i2c = to_i2c_client(dev); 491 struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c); 492 493 if (device_may_wakeup(dev)) 494 disable_irq_wake(sec_pmic->irq); 495 enable_irq(sec_pmic->irq); 496 497 return 0; 498 } 499 #endif /* CONFIG_PM_SLEEP */ 500 501 static SIMPLE_DEV_PM_OPS(sec_pmic_pm_ops, sec_pmic_suspend, sec_pmic_resume); 502 503 static struct i2c_driver sec_pmic_driver = { 504 .driver = { 505 .name = "sec_pmic", 506 .pm = &sec_pmic_pm_ops, 507 .of_match_table = sec_dt_match, 508 }, 509 .probe = sec_pmic_probe, 510 .shutdown = sec_pmic_shutdown, 511 }; 512 module_i2c_driver(sec_pmic_driver); 513 514 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>"); 515 MODULE_DESCRIPTION("Core support for the S5M MFD"); 516 MODULE_LICENSE("GPL"); 517