1 /* 2 * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM 3 * and audio CODEC devices 4 * 5 * Copyright (C) 2005-2006 Texas Instruments, Inc. 6 * 7 * Modifications to defer interrupt handling to a kernel thread: 8 * Copyright (C) 2006 MontaVista Software, Inc. 9 * 10 * Based on tlv320aic23.c: 11 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com> 12 * 13 * Code cleanup and modifications to IRQ handler. 14 * by syed khasim <x0khasim@ti.com> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #include <linux/init.h> 32 #include <linux/mutex.h> 33 #include <linux/module.h> 34 #include <linux/platform_device.h> 35 #include <linux/regmap.h> 36 #include <linux/clk.h> 37 #include <linux/err.h> 38 #include <linux/device.h> 39 #include <linux/of.h> 40 #include <linux/of_irq.h> 41 #include <linux/of_platform.h> 42 #include <linux/irq.h> 43 #include <linux/irqdomain.h> 44 45 #include <linux/regulator/machine.h> 46 47 #include <linux/i2c.h> 48 #include <linux/i2c/twl.h> 49 50 #include "twl-core.h" 51 52 /* 53 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power 54 * Management and System Companion Device" chips originally designed for 55 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, 56 * often at around 3 Mbit/sec, including for interrupt handling. 57 * 58 * This driver core provides genirq support for the interrupts emitted, 59 * by the various modules, and exports register access primitives. 60 * 61 * FIXME this driver currently requires use of the first interrupt line 62 * (and associated registers). 63 */ 64 65 #define DRIVER_NAME "twl" 66 67 /* Triton Core internal information (BEGIN) */ 68 69 /* Base Address defns for twl4030_map[] */ 70 71 /* subchip/slave 0 - USB ID */ 72 #define TWL4030_BASEADD_USB 0x0000 73 74 /* subchip/slave 1 - AUD ID */ 75 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 76 #define TWL4030_BASEADD_GPIO 0x0098 77 #define TWL4030_BASEADD_INTBR 0x0085 78 #define TWL4030_BASEADD_PIH 0x0080 79 #define TWL4030_BASEADD_TEST 0x004C 80 81 /* subchip/slave 2 - AUX ID */ 82 #define TWL4030_BASEADD_INTERRUPTS 0x00B9 83 #define TWL4030_BASEADD_LED 0x00EE 84 #define TWL4030_BASEADD_MADC 0x0000 85 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 86 #define TWL4030_BASEADD_PRECHARGE 0x00AA 87 #define TWL4030_BASEADD_PWM 0x00F8 88 #define TWL4030_BASEADD_KEYPAD 0x00D2 89 90 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */ 91 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's 92 one */ 93 94 /* subchip/slave 3 - POWER ID */ 95 #define TWL4030_BASEADD_BACKUP 0x0014 96 #define TWL4030_BASEADD_INT 0x002E 97 #define TWL4030_BASEADD_PM_MASTER 0x0036 98 #define TWL4030_BASEADD_PM_RECEIVER 0x005B 99 #define TWL4030_BASEADD_RTC 0x001C 100 #define TWL4030_BASEADD_SECURED_REG 0x0000 101 102 /* Triton Core internal information (END) */ 103 104 105 /* subchip/slave 0 0x48 - POWER */ 106 #define TWL6030_BASEADD_RTC 0x0000 107 #define TWL6030_BASEADD_SECURED_REG 0x0017 108 #define TWL6030_BASEADD_PM_MASTER 0x001F 109 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ 110 #define TWL6030_BASEADD_PM_MISC 0x00E2 111 #define TWL6030_BASEADD_PM_PUPD 0x00F0 112 113 /* subchip/slave 1 0x49 - FEATURE */ 114 #define TWL6030_BASEADD_USB 0x0000 115 #define TWL6030_BASEADD_GPADC_CTRL 0x002E 116 #define TWL6030_BASEADD_AUX 0x0090 117 #define TWL6030_BASEADD_PWM 0x00BA 118 #define TWL6030_BASEADD_GASGAUGE 0x00C0 119 #define TWL6030_BASEADD_PIH 0x00D0 120 #define TWL6030_BASEADD_CHARGER 0x00E0 121 #define TWL6025_BASEADD_CHARGER 0x00DA 122 #define TWL6030_BASEADD_LED 0x00F4 123 124 /* subchip/slave 2 0x4A - DFT */ 125 #define TWL6030_BASEADD_DIEID 0x00C0 126 127 /* subchip/slave 3 0x4B - AUDIO */ 128 #define TWL6030_BASEADD_AUDIO 0x0000 129 #define TWL6030_BASEADD_RSV 0x0000 130 #define TWL6030_BASEADD_ZERO 0x0000 131 132 /* Few power values */ 133 #define R_CFG_BOOT 0x05 134 135 /* some fields in R_CFG_BOOT */ 136 #define HFCLK_FREQ_19p2_MHZ (1 << 0) 137 #define HFCLK_FREQ_26_MHZ (2 << 0) 138 #define HFCLK_FREQ_38p4_MHZ (3 << 0) 139 #define HIGH_PERF_SQ (1 << 3) 140 #define CK32K_LOWPWR_EN (1 << 7) 141 142 /*----------------------------------------------------------------------*/ 143 144 /* Structure for each TWL4030/TWL6030 Slave */ 145 struct twl_client { 146 struct i2c_client *client; 147 struct regmap *regmap; 148 }; 149 150 /* mapping the module id to slave id and base address */ 151 struct twl_mapping { 152 unsigned char sid; /* Slave ID */ 153 unsigned char base; /* base address */ 154 }; 155 156 struct twl_private { 157 bool ready; /* The core driver is ready to be used */ 158 u32 twl_idcode; /* TWL IDCODE Register value */ 159 unsigned int twl_id; 160 161 struct twl_mapping *twl_map; 162 struct twl_client *twl_modules; 163 }; 164 165 static struct twl_private *twl_priv; 166 167 static struct twl_mapping twl4030_map[] = { 168 /* 169 * NOTE: don't change this table without updating the 170 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 171 * so they continue to match the order in this table. 172 */ 173 174 /* Common IPs */ 175 { 0, TWL4030_BASEADD_USB }, 176 { 1, TWL4030_BASEADD_PIH }, 177 { 2, TWL4030_BASEADD_MAIN_CHARGE }, 178 { 3, TWL4030_BASEADD_PM_MASTER }, 179 { 3, TWL4030_BASEADD_PM_RECEIVER }, 180 181 { 3, TWL4030_BASEADD_RTC }, 182 { 2, TWL4030_BASEADD_PWM }, 183 { 2, TWL4030_BASEADD_LED }, 184 { 3, TWL4030_BASEADD_SECURED_REG }, 185 186 /* TWL4030 specific IPs */ 187 { 1, TWL4030_BASEADD_AUDIO_VOICE }, 188 { 1, TWL4030_BASEADD_GPIO }, 189 { 1, TWL4030_BASEADD_INTBR }, 190 { 1, TWL4030_BASEADD_TEST }, 191 { 2, TWL4030_BASEADD_KEYPAD }, 192 193 { 2, TWL4030_BASEADD_MADC }, 194 { 2, TWL4030_BASEADD_INTERRUPTS }, 195 { 2, TWL4030_BASEADD_PRECHARGE }, 196 { 3, TWL4030_BASEADD_BACKUP }, 197 { 3, TWL4030_BASEADD_INT }, 198 199 { 2, TWL5031_BASEADD_ACCESSORY }, 200 { 2, TWL5031_BASEADD_INTERRUPTS }, 201 }; 202 203 static struct regmap_config twl4030_regmap_config[4] = { 204 { 205 /* Address 0x48 */ 206 .reg_bits = 8, 207 .val_bits = 8, 208 .max_register = 0xff, 209 }, 210 { 211 /* Address 0x49 */ 212 .reg_bits = 8, 213 .val_bits = 8, 214 .max_register = 0xff, 215 }, 216 { 217 /* Address 0x4a */ 218 .reg_bits = 8, 219 .val_bits = 8, 220 .max_register = 0xff, 221 }, 222 { 223 /* Address 0x4b */ 224 .reg_bits = 8, 225 .val_bits = 8, 226 .max_register = 0xff, 227 }, 228 }; 229 230 static struct twl_mapping twl6030_map[] = { 231 /* 232 * NOTE: don't change this table without updating the 233 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 234 * so they continue to match the order in this table. 235 */ 236 237 /* Common IPs */ 238 { 1, TWL6030_BASEADD_USB }, 239 { 1, TWL6030_BASEADD_PIH }, 240 { 1, TWL6030_BASEADD_CHARGER }, 241 { 0, TWL6030_BASEADD_PM_MASTER }, 242 { 0, TWL6030_BASEADD_PM_SLAVE_MISC }, 243 244 { 0, TWL6030_BASEADD_RTC }, 245 { 1, TWL6030_BASEADD_PWM }, 246 { 1, TWL6030_BASEADD_LED }, 247 { 0, TWL6030_BASEADD_SECURED_REG }, 248 249 /* TWL6030 specific IPs */ 250 { 0, TWL6030_BASEADD_ZERO }, 251 { 1, TWL6030_BASEADD_ZERO }, 252 { 2, TWL6030_BASEADD_ZERO }, 253 { 1, TWL6030_BASEADD_GPADC_CTRL }, 254 { 1, TWL6030_BASEADD_GASGAUGE }, 255 }; 256 257 static struct regmap_config twl6030_regmap_config[3] = { 258 { 259 /* Address 0x48 */ 260 .reg_bits = 8, 261 .val_bits = 8, 262 .max_register = 0xff, 263 }, 264 { 265 /* Address 0x49 */ 266 .reg_bits = 8, 267 .val_bits = 8, 268 .max_register = 0xff, 269 }, 270 { 271 /* Address 0x4a */ 272 .reg_bits = 8, 273 .val_bits = 8, 274 .max_register = 0xff, 275 }, 276 }; 277 278 /*----------------------------------------------------------------------*/ 279 280 static inline int twl_get_num_slaves(void) 281 { 282 if (twl_class_is_4030()) 283 return 4; /* TWL4030 class have four slave address */ 284 else 285 return 3; /* TWL6030 class have three slave address */ 286 } 287 288 static inline int twl_get_last_module(void) 289 { 290 if (twl_class_is_4030()) 291 return TWL4030_MODULE_LAST; 292 else 293 return TWL6030_MODULE_LAST; 294 } 295 296 /* Exported Functions */ 297 298 unsigned int twl_rev(void) 299 { 300 return twl_priv ? twl_priv->twl_id : 0; 301 } 302 EXPORT_SYMBOL(twl_rev); 303 304 /** 305 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0 306 * @mod_no: module number 307 * @value: an array of num_bytes+1 containing data to write 308 * @reg: register address (just offset will do) 309 * @num_bytes: number of bytes to transfer 310 * 311 * Returns the result of operation - 0 is success 312 */ 313 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 314 { 315 int ret; 316 int sid; 317 struct twl_client *twl; 318 319 if (unlikely(!twl_priv || !twl_priv->ready)) { 320 pr_err("%s: not initialized\n", DRIVER_NAME); 321 return -EPERM; 322 } 323 if (unlikely(mod_no >= twl_get_last_module())) { 324 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 325 return -EPERM; 326 } 327 328 sid = twl_priv->twl_map[mod_no].sid; 329 twl = &twl_priv->twl_modules[sid]; 330 331 ret = regmap_bulk_write(twl->regmap, 332 twl_priv->twl_map[mod_no].base + reg, value, 333 num_bytes); 334 335 if (ret) 336 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n", 337 DRIVER_NAME, mod_no, reg, num_bytes); 338 339 return ret; 340 } 341 EXPORT_SYMBOL(twl_i2c_write); 342 343 /** 344 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0 345 * @mod_no: module number 346 * @value: an array of num_bytes containing data to be read 347 * @reg: register address (just offset will do) 348 * @num_bytes: number of bytes to transfer 349 * 350 * Returns result of operation - num_bytes is success else failure. 351 */ 352 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 353 { 354 int ret; 355 int sid; 356 struct twl_client *twl; 357 358 if (unlikely(!twl_priv || !twl_priv->ready)) { 359 pr_err("%s: not initialized\n", DRIVER_NAME); 360 return -EPERM; 361 } 362 if (unlikely(mod_no >= twl_get_last_module())) { 363 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 364 return -EPERM; 365 } 366 367 sid = twl_priv->twl_map[mod_no].sid; 368 twl = &twl_priv->twl_modules[sid]; 369 370 ret = regmap_bulk_read(twl->regmap, 371 twl_priv->twl_map[mod_no].base + reg, value, 372 num_bytes); 373 374 if (ret) 375 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n", 376 DRIVER_NAME, mod_no, reg, num_bytes); 377 378 return ret; 379 } 380 EXPORT_SYMBOL(twl_i2c_read); 381 382 /*----------------------------------------------------------------------*/ 383 384 /** 385 * twl_read_idcode_register - API to read the IDCODE register. 386 * 387 * Unlocks the IDCODE register and read the 32 bit value. 388 */ 389 static int twl_read_idcode_register(void) 390 { 391 int err; 392 393 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK, 394 REG_UNLOCK_TEST_REG); 395 if (err) { 396 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err); 397 goto fail; 398 } 399 400 err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode), 401 REG_IDCODE_7_0, 4); 402 if (err) { 403 pr_err("TWL4030: unable to read IDCODE -%d\n", err); 404 goto fail; 405 } 406 407 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG); 408 if (err) 409 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err); 410 fail: 411 return err; 412 } 413 414 /** 415 * twl_get_type - API to get TWL Si type. 416 * 417 * Api to get the TWL Si type from IDCODE value. 418 */ 419 int twl_get_type(void) 420 { 421 return TWL_SIL_TYPE(twl_priv->twl_idcode); 422 } 423 EXPORT_SYMBOL_GPL(twl_get_type); 424 425 /** 426 * twl_get_version - API to get TWL Si version. 427 * 428 * Api to get the TWL Si version from IDCODE value. 429 */ 430 int twl_get_version(void) 431 { 432 return TWL_SIL_REV(twl_priv->twl_idcode); 433 } 434 EXPORT_SYMBOL_GPL(twl_get_version); 435 436 /** 437 * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate. 438 * 439 * Api to get the TWL HFCLK rate based on BOOT_CFG register. 440 */ 441 int twl_get_hfclk_rate(void) 442 { 443 u8 ctrl; 444 int rate; 445 446 twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT); 447 448 switch (ctrl & 0x3) { 449 case HFCLK_FREQ_19p2_MHZ: 450 rate = 19200000; 451 break; 452 case HFCLK_FREQ_26_MHZ: 453 rate = 26000000; 454 break; 455 case HFCLK_FREQ_38p4_MHZ: 456 rate = 38400000; 457 break; 458 default: 459 pr_err("TWL4030: HFCLK is not configured\n"); 460 rate = -EINVAL; 461 break; 462 } 463 464 return rate; 465 } 466 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate); 467 468 static struct device * 469 add_numbered_child(unsigned mod_no, const char *name, int num, 470 void *pdata, unsigned pdata_len, 471 bool can_wakeup, int irq0, int irq1) 472 { 473 struct platform_device *pdev; 474 struct twl_client *twl; 475 int status, sid; 476 477 if (unlikely(mod_no >= twl_get_last_module())) { 478 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 479 return ERR_PTR(-EPERM); 480 } 481 sid = twl_priv->twl_map[mod_no].sid; 482 twl = &twl_priv->twl_modules[sid]; 483 484 pdev = platform_device_alloc(name, num); 485 if (!pdev) { 486 dev_dbg(&twl->client->dev, "can't alloc dev\n"); 487 status = -ENOMEM; 488 goto err; 489 } 490 491 pdev->dev.parent = &twl->client->dev; 492 493 if (pdata) { 494 status = platform_device_add_data(pdev, pdata, pdata_len); 495 if (status < 0) { 496 dev_dbg(&pdev->dev, "can't add platform_data\n"); 497 goto err; 498 } 499 } 500 501 if (irq0) { 502 struct resource r[2] = { 503 { .start = irq0, .flags = IORESOURCE_IRQ, }, 504 { .start = irq1, .flags = IORESOURCE_IRQ, }, 505 }; 506 507 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); 508 if (status < 0) { 509 dev_dbg(&pdev->dev, "can't add irqs\n"); 510 goto err; 511 } 512 } 513 514 status = platform_device_add(pdev); 515 if (status == 0) 516 device_init_wakeup(&pdev->dev, can_wakeup); 517 518 err: 519 if (status < 0) { 520 platform_device_put(pdev); 521 dev_err(&twl->client->dev, "can't add %s dev\n", name); 522 return ERR_PTR(status); 523 } 524 return &pdev->dev; 525 } 526 527 static inline struct device *add_child(unsigned mod_no, const char *name, 528 void *pdata, unsigned pdata_len, 529 bool can_wakeup, int irq0, int irq1) 530 { 531 return add_numbered_child(mod_no, name, -1, pdata, pdata_len, 532 can_wakeup, irq0, irq1); 533 } 534 535 static struct device * 536 add_regulator_linked(int num, struct regulator_init_data *pdata, 537 struct regulator_consumer_supply *consumers, 538 unsigned num_consumers, unsigned long features) 539 { 540 struct twl_regulator_driver_data drv_data; 541 542 /* regulator framework demands init_data ... */ 543 if (!pdata) 544 return NULL; 545 546 if (consumers) { 547 pdata->consumer_supplies = consumers; 548 pdata->num_consumer_supplies = num_consumers; 549 } 550 551 if (pdata->driver_data) { 552 /* If we have existing drv_data, just add the flags */ 553 struct twl_regulator_driver_data *tmp; 554 tmp = pdata->driver_data; 555 tmp->features |= features; 556 } else { 557 /* add new driver data struct, used only during init */ 558 drv_data.features = features; 559 drv_data.set_voltage = NULL; 560 drv_data.get_voltage = NULL; 561 drv_data.data = NULL; 562 pdata->driver_data = &drv_data; 563 } 564 565 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ 566 return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num, 567 pdata, sizeof(*pdata), false, 0, 0); 568 } 569 570 static struct device * 571 add_regulator(int num, struct regulator_init_data *pdata, 572 unsigned long features) 573 { 574 return add_regulator_linked(num, pdata, NULL, 0, features); 575 } 576 577 /* 578 * NOTE: We know the first 8 IRQs after pdata->base_irq are 579 * for the PIH, and the next are for the PWR_INT SIH, since 580 * that's how twl_init_irq() sets things up. 581 */ 582 583 static int 584 add_children(struct twl4030_platform_data *pdata, unsigned irq_base, 585 unsigned long features) 586 { 587 struct device *child; 588 589 if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) { 590 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio", 591 pdata->gpio, sizeof(*pdata->gpio), 592 false, irq_base + GPIO_INTR_OFFSET, 0); 593 if (IS_ERR(child)) 594 return PTR_ERR(child); 595 } 596 597 if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) { 598 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad", 599 pdata->keypad, sizeof(*pdata->keypad), 600 true, irq_base + KEYPAD_INTR_OFFSET, 0); 601 if (IS_ERR(child)) 602 return PTR_ERR(child); 603 } 604 605 if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc && 606 twl_class_is_4030()) { 607 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc", 608 pdata->madc, sizeof(*pdata->madc), 609 true, irq_base + MADC_INTR_OFFSET, 0); 610 if (IS_ERR(child)) 611 return PTR_ERR(child); 612 } 613 614 if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) { 615 /* 616 * REVISIT platform_data here currently might expose the 617 * "msecure" line ... but for now we just expect board 618 * setup to tell the chip "it's always ok to SET_TIME". 619 * Eventually, Linux might become more aware of such 620 * HW security concerns, and "least privilege". 621 */ 622 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0, 623 true, irq_base + RTC_INTR_OFFSET, 0); 624 if (IS_ERR(child)) 625 return PTR_ERR(child); 626 } 627 628 if (IS_ENABLED(CONFIG_PWM_TWL)) { 629 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0, 630 false, 0, 0); 631 if (IS_ERR(child)) 632 return PTR_ERR(child); 633 } 634 635 if (IS_ENABLED(CONFIG_PWM_TWL_LED)) { 636 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0, 637 false, 0, 0); 638 if (IS_ERR(child)) 639 return PTR_ERR(child); 640 } 641 642 if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb && 643 twl_class_is_4030()) { 644 645 static struct regulator_consumer_supply usb1v5 = { 646 .supply = "usb1v5", 647 }; 648 static struct regulator_consumer_supply usb1v8 = { 649 .supply = "usb1v8", 650 }; 651 static struct regulator_consumer_supply usb3v1[] = { 652 { .supply = "usb3v1" }, 653 { .supply = "bci3v1" }, 654 }; 655 656 /* First add the regulators so that they can be used by transceiver */ 657 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) { 658 /* this is a template that gets copied */ 659 struct regulator_init_data usb_fixed = { 660 .constraints.valid_modes_mask = 661 REGULATOR_MODE_NORMAL 662 | REGULATOR_MODE_STANDBY, 663 .constraints.valid_ops_mask = 664 REGULATOR_CHANGE_MODE 665 | REGULATOR_CHANGE_STATUS, 666 }; 667 668 child = add_regulator_linked(TWL4030_REG_VUSB1V5, 669 &usb_fixed, &usb1v5, 1, 670 features); 671 if (IS_ERR(child)) 672 return PTR_ERR(child); 673 674 child = add_regulator_linked(TWL4030_REG_VUSB1V8, 675 &usb_fixed, &usb1v8, 1, 676 features); 677 if (IS_ERR(child)) 678 return PTR_ERR(child); 679 680 child = add_regulator_linked(TWL4030_REG_VUSB3V1, 681 &usb_fixed, usb3v1, 2, 682 features); 683 if (IS_ERR(child)) 684 return PTR_ERR(child); 685 686 } 687 688 child = add_child(TWL_MODULE_USB, "twl4030_usb", 689 pdata->usb, sizeof(*pdata->usb), true, 690 /* irq0 = USB_PRES, irq1 = USB */ 691 irq_base + USB_PRES_INTR_OFFSET, 692 irq_base + USB_INTR_OFFSET); 693 694 if (IS_ERR(child)) 695 return PTR_ERR(child); 696 697 /* we need to connect regulators to this transceiver */ 698 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) { 699 usb1v5.dev_name = dev_name(child); 700 usb1v8.dev_name = dev_name(child); 701 usb3v1[0].dev_name = dev_name(child); 702 } 703 } 704 if (IS_ENABLED(CONFIG_TWL6030_USB) && pdata->usb && 705 twl_class_is_6030()) { 706 707 static struct regulator_consumer_supply usb3v3; 708 int regulator; 709 710 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) { 711 /* this is a template that gets copied */ 712 struct regulator_init_data usb_fixed = { 713 .constraints.valid_modes_mask = 714 REGULATOR_MODE_NORMAL 715 | REGULATOR_MODE_STANDBY, 716 .constraints.valid_ops_mask = 717 REGULATOR_CHANGE_MODE 718 | REGULATOR_CHANGE_STATUS, 719 }; 720 721 if (features & TWL6025_SUBCLASS) { 722 usb3v3.supply = "ldousb"; 723 regulator = TWL6025_REG_LDOUSB; 724 } else { 725 usb3v3.supply = "vusb"; 726 regulator = TWL6030_REG_VUSB; 727 } 728 child = add_regulator_linked(regulator, &usb_fixed, 729 &usb3v3, 1, 730 features); 731 if (IS_ERR(child)) 732 return PTR_ERR(child); 733 } 734 735 pdata->usb->features = features; 736 737 child = add_child(TWL_MODULE_USB, "twl6030_usb", 738 pdata->usb, sizeof(*pdata->usb), true, 739 /* irq1 = VBUS_PRES, irq0 = USB ID */ 740 irq_base + USBOTG_INTR_OFFSET, 741 irq_base + USB_PRES_INTR_OFFSET); 742 743 if (IS_ERR(child)) 744 return PTR_ERR(child); 745 /* we need to connect regulators to this transceiver */ 746 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) 747 usb3v3.dev_name = dev_name(child); 748 } else if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && 749 twl_class_is_6030()) { 750 if (features & TWL6025_SUBCLASS) 751 child = add_regulator(TWL6025_REG_LDOUSB, 752 pdata->ldousb, features); 753 else 754 child = add_regulator(TWL6030_REG_VUSB, 755 pdata->vusb, features); 756 757 if (IS_ERR(child)) 758 return PTR_ERR(child); 759 } 760 761 if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) { 762 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL, 763 0, false, 0, 0); 764 if (IS_ERR(child)) 765 return PTR_ERR(child); 766 } 767 768 if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) { 769 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton", 770 NULL, 0, true, irq_base + 8 + 0, 0); 771 if (IS_ERR(child)) 772 return PTR_ERR(child); 773 } 774 775 if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio && 776 twl_class_is_4030()) { 777 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio", 778 pdata->audio, sizeof(*pdata->audio), 779 false, 0, 0); 780 if (IS_ERR(child)) 781 return PTR_ERR(child); 782 } 783 784 /* twl4030 regulators */ 785 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) { 786 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1, 787 features); 788 if (IS_ERR(child)) 789 return PTR_ERR(child); 790 791 child = add_regulator(TWL4030_REG_VIO, pdata->vio, 792 features); 793 if (IS_ERR(child)) 794 return PTR_ERR(child); 795 796 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1, 797 features); 798 if (IS_ERR(child)) 799 return PTR_ERR(child); 800 801 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2, 802 features); 803 if (IS_ERR(child)) 804 return PTR_ERR(child); 805 806 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1, 807 features); 808 if (IS_ERR(child)) 809 return PTR_ERR(child); 810 811 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac, 812 features); 813 if (IS_ERR(child)) 814 return PTR_ERR(child); 815 816 child = add_regulator((features & TWL4030_VAUX2) 817 ? TWL4030_REG_VAUX2_4030 818 : TWL4030_REG_VAUX2, 819 pdata->vaux2, features); 820 if (IS_ERR(child)) 821 return PTR_ERR(child); 822 823 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1, 824 features); 825 if (IS_ERR(child)) 826 return PTR_ERR(child); 827 828 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2, 829 features); 830 if (IS_ERR(child)) 831 return PTR_ERR(child); 832 833 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig, 834 features); 835 if (IS_ERR(child)) 836 return PTR_ERR(child); 837 } 838 839 /* maybe add LDOs that are omitted on cost-reduced parts */ 840 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET) 841 && twl_class_is_4030()) { 842 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2, 843 features); 844 if (IS_ERR(child)) 845 return PTR_ERR(child); 846 847 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2, 848 features); 849 if (IS_ERR(child)) 850 return PTR_ERR(child); 851 852 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim, 853 features); 854 if (IS_ERR(child)) 855 return PTR_ERR(child); 856 857 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1, 858 features); 859 if (IS_ERR(child)) 860 return PTR_ERR(child); 861 862 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3, 863 features); 864 if (IS_ERR(child)) 865 return PTR_ERR(child); 866 867 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4, 868 features); 869 if (IS_ERR(child)) 870 return PTR_ERR(child); 871 } 872 873 /* twl6030 regulators */ 874 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() && 875 !(features & TWL6025_SUBCLASS)) { 876 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1, 877 features); 878 if (IS_ERR(child)) 879 return PTR_ERR(child); 880 881 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2, 882 features); 883 if (IS_ERR(child)) 884 return PTR_ERR(child); 885 886 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3, 887 features); 888 if (IS_ERR(child)) 889 return PTR_ERR(child); 890 891 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8, 892 features); 893 if (IS_ERR(child)) 894 return PTR_ERR(child); 895 896 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1, 897 features); 898 if (IS_ERR(child)) 899 return PTR_ERR(child); 900 901 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc, 902 features); 903 if (IS_ERR(child)) 904 return PTR_ERR(child); 905 906 child = add_regulator(TWL6030_REG_VPP, pdata->vpp, 907 features); 908 if (IS_ERR(child)) 909 return PTR_ERR(child); 910 911 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim, 912 features); 913 if (IS_ERR(child)) 914 return PTR_ERR(child); 915 916 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio, 917 features); 918 if (IS_ERR(child)) 919 return PTR_ERR(child); 920 921 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac, 922 features); 923 if (IS_ERR(child)) 924 return PTR_ERR(child); 925 926 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1, 927 features); 928 if (IS_ERR(child)) 929 return PTR_ERR(child); 930 931 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2, 932 features); 933 if (IS_ERR(child)) 934 return PTR_ERR(child); 935 936 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3, 937 features); 938 if (IS_ERR(child)) 939 return PTR_ERR(child); 940 941 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg, 942 features); 943 if (IS_ERR(child)) 944 return PTR_ERR(child); 945 } 946 947 /* 6030 and 6025 share this regulator */ 948 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030()) { 949 child = add_regulator(TWL6030_REG_VANA, pdata->vana, 950 features); 951 if (IS_ERR(child)) 952 return PTR_ERR(child); 953 } 954 955 /* twl6025 regulators */ 956 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() && 957 (features & TWL6025_SUBCLASS)) { 958 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5, 959 features); 960 if (IS_ERR(child)) 961 return PTR_ERR(child); 962 963 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1, 964 features); 965 if (IS_ERR(child)) 966 return PTR_ERR(child); 967 968 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7, 969 features); 970 if (IS_ERR(child)) 971 return PTR_ERR(child); 972 973 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6, 974 features); 975 if (IS_ERR(child)) 976 return PTR_ERR(child); 977 978 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln, 979 features); 980 if (IS_ERR(child)) 981 return PTR_ERR(child); 982 983 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2, 984 features); 985 if (IS_ERR(child)) 986 return PTR_ERR(child); 987 988 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4, 989 features); 990 if (IS_ERR(child)) 991 return PTR_ERR(child); 992 993 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3, 994 features); 995 if (IS_ERR(child)) 996 return PTR_ERR(child); 997 998 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3, 999 features); 1000 if (IS_ERR(child)) 1001 return PTR_ERR(child); 1002 1003 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4, 1004 features); 1005 if (IS_ERR(child)) 1006 return PTR_ERR(child); 1007 1008 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025, 1009 features); 1010 if (IS_ERR(child)) 1011 return PTR_ERR(child); 1012 1013 } 1014 1015 if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci && 1016 !(features & (TPS_SUBSET | TWL5031))) { 1017 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci", 1018 pdata->bci, sizeof(*pdata->bci), false, 1019 /* irq0 = CHG_PRES, irq1 = BCI */ 1020 irq_base + BCI_PRES_INTR_OFFSET, 1021 irq_base + BCI_INTR_OFFSET); 1022 if (IS_ERR(child)) 1023 return PTR_ERR(child); 1024 } 1025 1026 return 0; 1027 } 1028 1029 /*----------------------------------------------------------------------*/ 1030 1031 /* 1032 * These three functions initialize the on-chip clock framework, 1033 * letting it generate the right frequencies for USB, MADC, and 1034 * other purposes. 1035 */ 1036 static inline int __init protect_pm_master(void) 1037 { 1038 int e = 0; 1039 1040 e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0, 1041 TWL4030_PM_MASTER_PROTECT_KEY); 1042 return e; 1043 } 1044 1045 static inline int __init unprotect_pm_master(void) 1046 { 1047 int e = 0; 1048 1049 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1, 1050 TWL4030_PM_MASTER_PROTECT_KEY); 1051 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2, 1052 TWL4030_PM_MASTER_PROTECT_KEY); 1053 1054 return e; 1055 } 1056 1057 static void clocks_init(struct device *dev, 1058 struct twl4030_clock_init_data *clock) 1059 { 1060 int e = 0; 1061 struct clk *osc; 1062 u32 rate; 1063 u8 ctrl = HFCLK_FREQ_26_MHZ; 1064 1065 osc = clk_get(dev, "fck"); 1066 if (IS_ERR(osc)) { 1067 printk(KERN_WARNING "Skipping twl internal clock init and " 1068 "using bootloader value (unknown osc rate)\n"); 1069 return; 1070 } 1071 1072 rate = clk_get_rate(osc); 1073 clk_put(osc); 1074 1075 switch (rate) { 1076 case 19200000: 1077 ctrl = HFCLK_FREQ_19p2_MHZ; 1078 break; 1079 case 26000000: 1080 ctrl = HFCLK_FREQ_26_MHZ; 1081 break; 1082 case 38400000: 1083 ctrl = HFCLK_FREQ_38p4_MHZ; 1084 break; 1085 } 1086 1087 ctrl |= HIGH_PERF_SQ; 1088 if (clock && clock->ck32k_lowpwr_enable) 1089 ctrl |= CK32K_LOWPWR_EN; 1090 1091 e |= unprotect_pm_master(); 1092 /* effect->MADC+USB ck en */ 1093 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); 1094 e |= protect_pm_master(); 1095 1096 if (e < 0) 1097 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); 1098 } 1099 1100 /*----------------------------------------------------------------------*/ 1101 1102 1103 static int twl_remove(struct i2c_client *client) 1104 { 1105 unsigned i, num_slaves; 1106 int status; 1107 1108 if (twl_class_is_4030()) 1109 status = twl4030_exit_irq(); 1110 else 1111 status = twl6030_exit_irq(); 1112 1113 if (status < 0) 1114 return status; 1115 1116 num_slaves = twl_get_num_slaves(); 1117 for (i = 0; i < num_slaves; i++) { 1118 struct twl_client *twl = &twl_priv->twl_modules[i]; 1119 1120 if (twl->client && twl->client != client) 1121 i2c_unregister_device(twl->client); 1122 twl->client = NULL; 1123 } 1124 twl_priv->ready = false; 1125 return 0; 1126 } 1127 1128 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */ 1129 static int 1130 twl_probe(struct i2c_client *client, const struct i2c_device_id *id) 1131 { 1132 struct twl4030_platform_data *pdata = client->dev.platform_data; 1133 struct device_node *node = client->dev.of_node; 1134 struct platform_device *pdev; 1135 struct regmap_config *twl_regmap_config; 1136 int irq_base = 0; 1137 int status; 1138 unsigned i, num_slaves; 1139 1140 if (!node && !pdata) { 1141 dev_err(&client->dev, "no platform data\n"); 1142 return -EINVAL; 1143 } 1144 1145 if (twl_priv) { 1146 dev_dbg(&client->dev, "only one instance of %s allowed\n", 1147 DRIVER_NAME); 1148 return -EBUSY; 1149 } 1150 1151 pdev = platform_device_alloc(DRIVER_NAME, -1); 1152 if (!pdev) { 1153 dev_err(&client->dev, "can't alloc pdev\n"); 1154 return -ENOMEM; 1155 } 1156 1157 status = platform_device_add(pdev); 1158 if (status) { 1159 platform_device_put(pdev); 1160 return status; 1161 } 1162 1163 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { 1164 dev_dbg(&client->dev, "can't talk I2C?\n"); 1165 status = -EIO; 1166 goto free; 1167 } 1168 1169 twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private), 1170 GFP_KERNEL); 1171 if (!twl_priv) { 1172 status = -ENOMEM; 1173 goto free; 1174 } 1175 1176 if ((id->driver_data) & TWL6030_CLASS) { 1177 twl_priv->twl_id = TWL6030_CLASS_ID; 1178 twl_priv->twl_map = &twl6030_map[0]; 1179 /* The charger base address is different in twl6025 */ 1180 if ((id->driver_data) & TWL6025_SUBCLASS) 1181 twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base = 1182 TWL6025_BASEADD_CHARGER; 1183 twl_regmap_config = twl6030_regmap_config; 1184 } else { 1185 twl_priv->twl_id = TWL4030_CLASS_ID; 1186 twl_priv->twl_map = &twl4030_map[0]; 1187 twl_regmap_config = twl4030_regmap_config; 1188 } 1189 1190 num_slaves = twl_get_num_slaves(); 1191 twl_priv->twl_modules = devm_kzalloc(&client->dev, 1192 sizeof(struct twl_client) * num_slaves, 1193 GFP_KERNEL); 1194 if (!twl_priv->twl_modules) { 1195 status = -ENOMEM; 1196 goto free; 1197 } 1198 1199 for (i = 0; i < num_slaves; i++) { 1200 struct twl_client *twl = &twl_priv->twl_modules[i]; 1201 1202 if (i == 0) { 1203 twl->client = client; 1204 } else { 1205 twl->client = i2c_new_dummy(client->adapter, 1206 client->addr + i); 1207 if (!twl->client) { 1208 dev_err(&client->dev, 1209 "can't attach client %d\n", i); 1210 status = -ENOMEM; 1211 goto fail; 1212 } 1213 } 1214 1215 twl->regmap = devm_regmap_init_i2c(twl->client, 1216 &twl_regmap_config[i]); 1217 if (IS_ERR(twl->regmap)) { 1218 status = PTR_ERR(twl->regmap); 1219 dev_err(&client->dev, 1220 "Failed to allocate regmap %d, err: %d\n", i, 1221 status); 1222 goto fail; 1223 } 1224 } 1225 1226 twl_priv->ready = true; 1227 1228 /* setup clock framework */ 1229 clocks_init(&pdev->dev, pdata ? pdata->clock : NULL); 1230 1231 /* read TWL IDCODE Register */ 1232 if (twl_class_is_4030()) { 1233 status = twl_read_idcode_register(); 1234 WARN(status < 0, "Error: reading twl_idcode register value\n"); 1235 } 1236 1237 /* load power event scripts */ 1238 if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata && pdata->power) 1239 twl4030_power_init(pdata->power); 1240 1241 /* Maybe init the T2 Interrupt subsystem */ 1242 if (client->irq) { 1243 if (twl_class_is_4030()) { 1244 twl4030_init_chip_irq(id->name); 1245 irq_base = twl4030_init_irq(&client->dev, client->irq); 1246 } else { 1247 irq_base = twl6030_init_irq(&client->dev, client->irq); 1248 } 1249 1250 if (irq_base < 0) { 1251 status = irq_base; 1252 goto fail; 1253 } 1254 } 1255 1256 /* 1257 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface. 1258 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0, 1259 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0. 1260 */ 1261 if (twl_class_is_4030()) { 1262 u8 temp; 1263 1264 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1); 1265 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \ 1266 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU); 1267 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1); 1268 } 1269 1270 if (node) 1271 status = of_platform_populate(node, NULL, NULL, &client->dev); 1272 else 1273 status = add_children(pdata, irq_base, id->driver_data); 1274 1275 fail: 1276 if (status < 0) 1277 twl_remove(client); 1278 free: 1279 if (status < 0) 1280 platform_device_unregister(pdev); 1281 1282 return status; 1283 } 1284 1285 static const struct i2c_device_id twl_ids[] = { 1286 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ 1287 { "twl5030", 0 }, /* T2 updated */ 1288 { "twl5031", TWL5031 }, /* TWL5030 updated */ 1289 { "tps65950", 0 }, /* catalog version of twl5030 */ 1290 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ 1291 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ 1292 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED 1293 and vibrator. Charger in USB module*/ 1294 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ 1295 { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */ 1296 { /* end of list */ }, 1297 }; 1298 MODULE_DEVICE_TABLE(i2c, twl_ids); 1299 1300 /* One Client Driver , 4 Clients */ 1301 static struct i2c_driver twl_driver = { 1302 .driver.name = DRIVER_NAME, 1303 .id_table = twl_ids, 1304 .probe = twl_probe, 1305 .remove = twl_remove, 1306 }; 1307 1308 static int __init twl_init(void) 1309 { 1310 return i2c_add_driver(&twl_driver); 1311 } 1312 subsys_initcall(twl_init); 1313 1314 static void __exit twl_exit(void) 1315 { 1316 i2c_del_driver(&twl_driver); 1317 } 1318 module_exit(twl_exit); 1319 1320 MODULE_AUTHOR("Texas Instruments, Inc."); 1321 MODULE_DESCRIPTION("I2C Core interface for TWL"); 1322 MODULE_LICENSE("GPL"); 1323