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/clk.h> 36 #include <linux/err.h> 37 #include <linux/device.h> 38 #include <linux/of.h> 39 #include <linux/of_irq.h> 40 #include <linux/of_platform.h> 41 #include <linux/irq.h> 42 #include <linux/irqdomain.h> 43 44 #include <linux/regulator/machine.h> 45 46 #include <linux/i2c.h> 47 #include <linux/i2c/twl.h> 48 49 #include "twl-core.h" 50 51 /* 52 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power 53 * Management and System Companion Device" chips originally designed for 54 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, 55 * often at around 3 Mbit/sec, including for interrupt handling. 56 * 57 * This driver core provides genirq support for the interrupts emitted, 58 * by the various modules, and exports register access primitives. 59 * 60 * FIXME this driver currently requires use of the first interrupt line 61 * (and associated registers). 62 */ 63 64 #define DRIVER_NAME "twl" 65 66 /* Triton Core internal information (BEGIN) */ 67 68 /* Last - for index max*/ 69 #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG 70 71 #define TWL_NUM_SLAVES 4 72 73 #define SUB_CHIP_ID0 0 74 #define SUB_CHIP_ID1 1 75 #define SUB_CHIP_ID2 2 76 #define SUB_CHIP_ID3 3 77 #define SUB_CHIP_ID_INVAL 0xff 78 79 #define TWL_MODULE_LAST TWL4030_MODULE_LAST 80 81 /* Base Address defns for twl4030_map[] */ 82 83 /* subchip/slave 0 - USB ID */ 84 #define TWL4030_BASEADD_USB 0x0000 85 86 /* subchip/slave 1 - AUD ID */ 87 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 88 #define TWL4030_BASEADD_GPIO 0x0098 89 #define TWL4030_BASEADD_INTBR 0x0085 90 #define TWL4030_BASEADD_PIH 0x0080 91 #define TWL4030_BASEADD_TEST 0x004C 92 93 /* subchip/slave 2 - AUX ID */ 94 #define TWL4030_BASEADD_INTERRUPTS 0x00B9 95 #define TWL4030_BASEADD_LED 0x00EE 96 #define TWL4030_BASEADD_MADC 0x0000 97 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 98 #define TWL4030_BASEADD_PRECHARGE 0x00AA 99 #define TWL4030_BASEADD_PWM0 0x00F8 100 #define TWL4030_BASEADD_PWM1 0x00FB 101 #define TWL4030_BASEADD_PWMA 0x00EF 102 #define TWL4030_BASEADD_PWMB 0x00F1 103 #define TWL4030_BASEADD_KEYPAD 0x00D2 104 105 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */ 106 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's 107 one */ 108 109 /* subchip/slave 3 - POWER ID */ 110 #define TWL4030_BASEADD_BACKUP 0x0014 111 #define TWL4030_BASEADD_INT 0x002E 112 #define TWL4030_BASEADD_PM_MASTER 0x0036 113 #define TWL4030_BASEADD_PM_RECEIVER 0x005B 114 #define TWL4030_BASEADD_RTC 0x001C 115 #define TWL4030_BASEADD_SECURED_REG 0x0000 116 117 /* Triton Core internal information (END) */ 118 119 120 /* subchip/slave 0 0x48 - POWER */ 121 #define TWL6030_BASEADD_RTC 0x0000 122 #define TWL6030_BASEADD_MEM 0x0017 123 #define TWL6030_BASEADD_PM_MASTER 0x001F 124 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ 125 #define TWL6030_BASEADD_PM_MISC 0x00E2 126 #define TWL6030_BASEADD_PM_PUPD 0x00F0 127 128 /* subchip/slave 1 0x49 - FEATURE */ 129 #define TWL6030_BASEADD_USB 0x0000 130 #define TWL6030_BASEADD_GPADC_CTRL 0x002E 131 #define TWL6030_BASEADD_AUX 0x0090 132 #define TWL6030_BASEADD_PWM 0x00BA 133 #define TWL6030_BASEADD_GASGAUGE 0x00C0 134 #define TWL6030_BASEADD_PIH 0x00D0 135 #define TWL6030_BASEADD_CHARGER 0x00E0 136 #define TWL6025_BASEADD_CHARGER 0x00DA 137 138 /* subchip/slave 2 0x4A - DFT */ 139 #define TWL6030_BASEADD_DIEID 0x00C0 140 141 /* subchip/slave 3 0x4B - AUDIO */ 142 #define TWL6030_BASEADD_AUDIO 0x0000 143 #define TWL6030_BASEADD_RSV 0x0000 144 #define TWL6030_BASEADD_ZERO 0x0000 145 146 /* Few power values */ 147 #define R_CFG_BOOT 0x05 148 149 /* some fields in R_CFG_BOOT */ 150 #define HFCLK_FREQ_19p2_MHZ (1 << 0) 151 #define HFCLK_FREQ_26_MHZ (2 << 0) 152 #define HFCLK_FREQ_38p4_MHZ (3 << 0) 153 #define HIGH_PERF_SQ (1 << 3) 154 #define CK32K_LOWPWR_EN (1 << 7) 155 156 /*----------------------------------------------------------------------*/ 157 158 /* is driver active, bound to a chip? */ 159 static bool inuse; 160 161 /* TWL IDCODE Register value */ 162 static u32 twl_idcode; 163 164 static unsigned int twl_id; 165 unsigned int twl_rev(void) 166 { 167 return twl_id; 168 } 169 EXPORT_SYMBOL(twl_rev); 170 171 /* Structure for each TWL4030/TWL6030 Slave */ 172 struct twl_client { 173 struct i2c_client *client; 174 u8 address; 175 176 /* max numb of i2c_msg required is for read =2 */ 177 struct i2c_msg xfer_msg[2]; 178 179 /* To lock access to xfer_msg */ 180 struct mutex xfer_lock; 181 }; 182 183 static struct twl_client twl_modules[TWL_NUM_SLAVES]; 184 185 /* mapping the module id to slave id and base address */ 186 struct twl_mapping { 187 unsigned char sid; /* Slave ID */ 188 unsigned char base; /* base address */ 189 }; 190 static struct twl_mapping *twl_map; 191 192 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { 193 /* 194 * NOTE: don't change this table without updating the 195 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 196 * so they continue to match the order in this table. 197 */ 198 199 { 0, TWL4030_BASEADD_USB }, 200 201 { 1, TWL4030_BASEADD_AUDIO_VOICE }, 202 { 1, TWL4030_BASEADD_GPIO }, 203 { 1, TWL4030_BASEADD_INTBR }, 204 { 1, TWL4030_BASEADD_PIH }, 205 { 1, TWL4030_BASEADD_TEST }, 206 207 { 2, TWL4030_BASEADD_KEYPAD }, 208 { 2, TWL4030_BASEADD_MADC }, 209 { 2, TWL4030_BASEADD_INTERRUPTS }, 210 { 2, TWL4030_BASEADD_LED }, 211 { 2, TWL4030_BASEADD_MAIN_CHARGE }, 212 { 2, TWL4030_BASEADD_PRECHARGE }, 213 { 2, TWL4030_BASEADD_PWM0 }, 214 { 2, TWL4030_BASEADD_PWM1 }, 215 { 2, TWL4030_BASEADD_PWMA }, 216 { 2, TWL4030_BASEADD_PWMB }, 217 { 2, TWL5031_BASEADD_ACCESSORY }, 218 { 2, TWL5031_BASEADD_INTERRUPTS }, 219 220 { 3, TWL4030_BASEADD_BACKUP }, 221 { 3, TWL4030_BASEADD_INT }, 222 { 3, TWL4030_BASEADD_PM_MASTER }, 223 { 3, TWL4030_BASEADD_PM_RECEIVER }, 224 { 3, TWL4030_BASEADD_RTC }, 225 { 3, TWL4030_BASEADD_SECURED_REG }, 226 }; 227 228 static struct twl_mapping twl6030_map[] = { 229 /* 230 * NOTE: don't change this table without updating the 231 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 232 * so they continue to match the order in this table. 233 */ 234 { SUB_CHIP_ID1, TWL6030_BASEADD_USB }, 235 { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO }, 236 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID }, 237 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 238 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH }, 239 240 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 241 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 242 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL }, 243 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 244 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 245 246 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER }, 247 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE }, 248 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM }, 249 { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO }, 250 { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO }, 251 252 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO }, 253 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO }, 254 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 255 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 256 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 257 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER }, 258 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC }, 259 260 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC }, 261 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM }, 262 { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER }, 263 }; 264 265 /*----------------------------------------------------------------------*/ 266 267 /* Exported Functions */ 268 269 /** 270 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0 271 * @mod_no: module number 272 * @value: an array of num_bytes+1 containing data to write 273 * @reg: register address (just offset will do) 274 * @num_bytes: number of bytes to transfer 275 * 276 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and 277 * valid data starts at Offset 1. 278 * 279 * Returns the result of operation - 0 is success 280 */ 281 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 282 { 283 int ret; 284 int sid; 285 struct twl_client *twl; 286 struct i2c_msg *msg; 287 288 if (unlikely(mod_no > TWL_MODULE_LAST)) { 289 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 290 return -EPERM; 291 } 292 if (unlikely(!inuse)) { 293 pr_err("%s: not initialized\n", DRIVER_NAME); 294 return -EPERM; 295 } 296 sid = twl_map[mod_no].sid; 297 if (unlikely(sid == SUB_CHIP_ID_INVAL)) { 298 pr_err("%s: module %d is not part of the pmic\n", 299 DRIVER_NAME, mod_no); 300 return -EINVAL; 301 } 302 twl = &twl_modules[sid]; 303 304 mutex_lock(&twl->xfer_lock); 305 /* 306 * [MSG1]: fill the register address data 307 * fill the data Tx buffer 308 */ 309 msg = &twl->xfer_msg[0]; 310 msg->addr = twl->address; 311 msg->len = num_bytes + 1; 312 msg->flags = 0; 313 msg->buf = value; 314 /* over write the first byte of buffer with the register address */ 315 *value = twl_map[mod_no].base + reg; 316 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); 317 mutex_unlock(&twl->xfer_lock); 318 319 /* i2c_transfer returns number of messages transferred */ 320 if (ret != 1) { 321 pr_err("%s: i2c_write failed to transfer all messages\n", 322 DRIVER_NAME); 323 if (ret < 0) 324 return ret; 325 else 326 return -EIO; 327 } else { 328 return 0; 329 } 330 } 331 EXPORT_SYMBOL(twl_i2c_write); 332 333 /** 334 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0 335 * @mod_no: module number 336 * @value: an array of num_bytes containing data to be read 337 * @reg: register address (just offset will do) 338 * @num_bytes: number of bytes to transfer 339 * 340 * Returns result of operation - num_bytes is success else failure. 341 */ 342 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 343 { 344 int ret; 345 u8 val; 346 int sid; 347 struct twl_client *twl; 348 struct i2c_msg *msg; 349 350 if (unlikely(mod_no > TWL_MODULE_LAST)) { 351 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 352 return -EPERM; 353 } 354 if (unlikely(!inuse)) { 355 pr_err("%s: not initialized\n", DRIVER_NAME); 356 return -EPERM; 357 } 358 sid = twl_map[mod_no].sid; 359 if (unlikely(sid == SUB_CHIP_ID_INVAL)) { 360 pr_err("%s: module %d is not part of the pmic\n", 361 DRIVER_NAME, mod_no); 362 return -EINVAL; 363 } 364 twl = &twl_modules[sid]; 365 366 mutex_lock(&twl->xfer_lock); 367 /* [MSG1] fill the register address data */ 368 msg = &twl->xfer_msg[0]; 369 msg->addr = twl->address; 370 msg->len = 1; 371 msg->flags = 0; /* Read the register value */ 372 val = twl_map[mod_no].base + reg; 373 msg->buf = &val; 374 /* [MSG2] fill the data rx buffer */ 375 msg = &twl->xfer_msg[1]; 376 msg->addr = twl->address; 377 msg->flags = I2C_M_RD; /* Read the register value */ 378 msg->len = num_bytes; /* only n bytes */ 379 msg->buf = value; 380 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); 381 mutex_unlock(&twl->xfer_lock); 382 383 /* i2c_transfer returns number of messages transferred */ 384 if (ret != 2) { 385 pr_err("%s: i2c_read failed to transfer all messages\n", 386 DRIVER_NAME); 387 if (ret < 0) 388 return ret; 389 else 390 return -EIO; 391 } else { 392 return 0; 393 } 394 } 395 EXPORT_SYMBOL(twl_i2c_read); 396 397 /** 398 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0 399 * @mod_no: module number 400 * @value: the value to be written 8 bit 401 * @reg: register address (just offset will do) 402 * 403 * Returns result of operation - 0 is success 404 */ 405 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg) 406 { 407 408 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ 409 u8 temp_buffer[2] = { 0 }; 410 /* offset 1 contains the data */ 411 temp_buffer[1] = value; 412 return twl_i2c_write(mod_no, temp_buffer, reg, 1); 413 } 414 EXPORT_SYMBOL(twl_i2c_write_u8); 415 416 /** 417 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0 418 * @mod_no: module number 419 * @value: the value read 8 bit 420 * @reg: register address (just offset will do) 421 * 422 * Returns result of operation - 0 is success 423 */ 424 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) 425 { 426 return twl_i2c_read(mod_no, value, reg, 1); 427 } 428 EXPORT_SYMBOL(twl_i2c_read_u8); 429 430 /*----------------------------------------------------------------------*/ 431 432 /** 433 * twl_read_idcode_register - API to read the IDCODE register. 434 * 435 * Unlocks the IDCODE register and read the 32 bit value. 436 */ 437 static int twl_read_idcode_register(void) 438 { 439 int err; 440 441 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK, 442 REG_UNLOCK_TEST_REG); 443 if (err) { 444 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err); 445 goto fail; 446 } 447 448 err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode), 449 REG_IDCODE_7_0, 4); 450 if (err) { 451 pr_err("TWL4030: unable to read IDCODE -%d\n", err); 452 goto fail; 453 } 454 455 err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG); 456 if (err) 457 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err); 458 fail: 459 return err; 460 } 461 462 /** 463 * twl_get_type - API to get TWL Si type. 464 * 465 * Api to get the TWL Si type from IDCODE value. 466 */ 467 int twl_get_type(void) 468 { 469 return TWL_SIL_TYPE(twl_idcode); 470 } 471 EXPORT_SYMBOL_GPL(twl_get_type); 472 473 /** 474 * twl_get_version - API to get TWL Si version. 475 * 476 * Api to get the TWL Si version from IDCODE value. 477 */ 478 int twl_get_version(void) 479 { 480 return TWL_SIL_REV(twl_idcode); 481 } 482 EXPORT_SYMBOL_GPL(twl_get_version); 483 484 /** 485 * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate. 486 * 487 * Api to get the TWL HFCLK rate based on BOOT_CFG register. 488 */ 489 int twl_get_hfclk_rate(void) 490 { 491 u8 ctrl; 492 int rate; 493 494 twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT); 495 496 switch (ctrl & 0x3) { 497 case HFCLK_FREQ_19p2_MHZ: 498 rate = 19200000; 499 break; 500 case HFCLK_FREQ_26_MHZ: 501 rate = 26000000; 502 break; 503 case HFCLK_FREQ_38p4_MHZ: 504 rate = 38400000; 505 break; 506 default: 507 pr_err("TWL4030: HFCLK is not configured\n"); 508 rate = -EINVAL; 509 break; 510 } 511 512 return rate; 513 } 514 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate); 515 516 static struct device * 517 add_numbered_child(unsigned chip, const char *name, int num, 518 void *pdata, unsigned pdata_len, 519 bool can_wakeup, int irq0, int irq1) 520 { 521 struct platform_device *pdev; 522 struct twl_client *twl = &twl_modules[chip]; 523 int status; 524 525 pdev = platform_device_alloc(name, num); 526 if (!pdev) { 527 dev_dbg(&twl->client->dev, "can't alloc dev\n"); 528 status = -ENOMEM; 529 goto err; 530 } 531 532 pdev->dev.parent = &twl->client->dev; 533 534 if (pdata) { 535 status = platform_device_add_data(pdev, pdata, pdata_len); 536 if (status < 0) { 537 dev_dbg(&pdev->dev, "can't add platform_data\n"); 538 goto err; 539 } 540 } 541 542 if (irq0) { 543 struct resource r[2] = { 544 { .start = irq0, .flags = IORESOURCE_IRQ, }, 545 { .start = irq1, .flags = IORESOURCE_IRQ, }, 546 }; 547 548 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); 549 if (status < 0) { 550 dev_dbg(&pdev->dev, "can't add irqs\n"); 551 goto err; 552 } 553 } 554 555 status = platform_device_add(pdev); 556 if (status == 0) 557 device_init_wakeup(&pdev->dev, can_wakeup); 558 559 err: 560 if (status < 0) { 561 platform_device_put(pdev); 562 dev_err(&twl->client->dev, "can't add %s dev\n", name); 563 return ERR_PTR(status); 564 } 565 return &pdev->dev; 566 } 567 568 static inline struct device *add_child(unsigned chip, const char *name, 569 void *pdata, unsigned pdata_len, 570 bool can_wakeup, int irq0, int irq1) 571 { 572 return add_numbered_child(chip, name, -1, pdata, pdata_len, 573 can_wakeup, irq0, irq1); 574 } 575 576 static struct device * 577 add_regulator_linked(int num, struct regulator_init_data *pdata, 578 struct regulator_consumer_supply *consumers, 579 unsigned num_consumers, unsigned long features) 580 { 581 unsigned sub_chip_id; 582 struct twl_regulator_driver_data drv_data; 583 584 /* regulator framework demands init_data ... */ 585 if (!pdata) 586 return NULL; 587 588 if (consumers) { 589 pdata->consumer_supplies = consumers; 590 pdata->num_consumer_supplies = num_consumers; 591 } 592 593 if (pdata->driver_data) { 594 /* If we have existing drv_data, just add the flags */ 595 struct twl_regulator_driver_data *tmp; 596 tmp = pdata->driver_data; 597 tmp->features |= features; 598 } else { 599 /* add new driver data struct, used only during init */ 600 drv_data.features = features; 601 drv_data.set_voltage = NULL; 602 drv_data.get_voltage = NULL; 603 drv_data.data = NULL; 604 pdata->driver_data = &drv_data; 605 } 606 607 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ 608 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid; 609 return add_numbered_child(sub_chip_id, "twl_reg", num, 610 pdata, sizeof(*pdata), false, 0, 0); 611 } 612 613 static struct device * 614 add_regulator(int num, struct regulator_init_data *pdata, 615 unsigned long features) 616 { 617 return add_regulator_linked(num, pdata, NULL, 0, features); 618 } 619 620 /* 621 * NOTE: We know the first 8 IRQs after pdata->base_irq are 622 * for the PIH, and the next are for the PWR_INT SIH, since 623 * that's how twl_init_irq() sets things up. 624 */ 625 626 static int 627 add_children(struct twl4030_platform_data *pdata, unsigned irq_base, 628 unsigned long features) 629 { 630 struct device *child; 631 unsigned sub_chip_id; 632 633 if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) { 634 child = add_child(SUB_CHIP_ID1, "twl4030_gpio", 635 pdata->gpio, sizeof(*pdata->gpio), 636 false, irq_base + GPIO_INTR_OFFSET, 0); 637 if (IS_ERR(child)) 638 return PTR_ERR(child); 639 } 640 641 if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) { 642 child = add_child(SUB_CHIP_ID2, "twl4030_keypad", 643 pdata->keypad, sizeof(*pdata->keypad), 644 true, irq_base + KEYPAD_INTR_OFFSET, 0); 645 if (IS_ERR(child)) 646 return PTR_ERR(child); 647 } 648 649 if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc) { 650 child = add_child(2, "twl4030_madc", 651 pdata->madc, sizeof(*pdata->madc), 652 true, irq_base + MADC_INTR_OFFSET, 0); 653 if (IS_ERR(child)) 654 return PTR_ERR(child); 655 } 656 657 if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) { 658 /* 659 * REVISIT platform_data here currently might expose the 660 * "msecure" line ... but for now we just expect board 661 * setup to tell the chip "it's always ok to SET_TIME". 662 * Eventually, Linux might become more aware of such 663 * HW security concerns, and "least privilege". 664 */ 665 sub_chip_id = twl_map[TWL_MODULE_RTC].sid; 666 child = add_child(sub_chip_id, "twl_rtc", 667 NULL, 0, 668 true, irq_base + RTC_INTR_OFFSET, 0); 669 if (IS_ERR(child)) 670 return PTR_ERR(child); 671 } 672 673 if (IS_ENABLED(CONFIG_PWM_TWL6030) && twl_class_is_6030()) { 674 child = add_child(TWL6030_MODULE_ID1, "twl6030-pwm", NULL, 0, 675 false, 0, 0); 676 if (IS_ERR(child)) 677 return PTR_ERR(child); 678 } 679 680 if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb && 681 twl_class_is_4030()) { 682 683 static struct regulator_consumer_supply usb1v5 = { 684 .supply = "usb1v5", 685 }; 686 static struct regulator_consumer_supply usb1v8 = { 687 .supply = "usb1v8", 688 }; 689 static struct regulator_consumer_supply usb3v1[] = { 690 { .supply = "usb3v1" }, 691 { .supply = "bci3v1" }, 692 }; 693 694 /* First add the regulators so that they can be used by transceiver */ 695 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) { 696 /* this is a template that gets copied */ 697 struct regulator_init_data usb_fixed = { 698 .constraints.valid_modes_mask = 699 REGULATOR_MODE_NORMAL 700 | REGULATOR_MODE_STANDBY, 701 .constraints.valid_ops_mask = 702 REGULATOR_CHANGE_MODE 703 | REGULATOR_CHANGE_STATUS, 704 }; 705 706 child = add_regulator_linked(TWL4030_REG_VUSB1V5, 707 &usb_fixed, &usb1v5, 1, 708 features); 709 if (IS_ERR(child)) 710 return PTR_ERR(child); 711 712 child = add_regulator_linked(TWL4030_REG_VUSB1V8, 713 &usb_fixed, &usb1v8, 1, 714 features); 715 if (IS_ERR(child)) 716 return PTR_ERR(child); 717 718 child = add_regulator_linked(TWL4030_REG_VUSB3V1, 719 &usb_fixed, usb3v1, 2, 720 features); 721 if (IS_ERR(child)) 722 return PTR_ERR(child); 723 724 } 725 726 child = add_child(0, "twl4030_usb", 727 pdata->usb, sizeof(*pdata->usb), 728 true, 729 /* irq0 = USB_PRES, irq1 = USB */ 730 irq_base + USB_PRES_INTR_OFFSET, 731 irq_base + USB_INTR_OFFSET); 732 733 if (IS_ERR(child)) 734 return PTR_ERR(child); 735 736 /* we need to connect regulators to this transceiver */ 737 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) { 738 usb1v5.dev_name = dev_name(child); 739 usb1v8.dev_name = dev_name(child); 740 usb3v1[0].dev_name = dev_name(child); 741 } 742 } 743 if (IS_ENABLED(CONFIG_TWL6030_USB) && pdata->usb && 744 twl_class_is_6030()) { 745 746 static struct regulator_consumer_supply usb3v3; 747 int regulator; 748 749 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) { 750 /* this is a template that gets copied */ 751 struct regulator_init_data usb_fixed = { 752 .constraints.valid_modes_mask = 753 REGULATOR_MODE_NORMAL 754 | REGULATOR_MODE_STANDBY, 755 .constraints.valid_ops_mask = 756 REGULATOR_CHANGE_MODE 757 | REGULATOR_CHANGE_STATUS, 758 }; 759 760 if (features & TWL6025_SUBCLASS) { 761 usb3v3.supply = "ldousb"; 762 regulator = TWL6025_REG_LDOUSB; 763 } else { 764 usb3v3.supply = "vusb"; 765 regulator = TWL6030_REG_VUSB; 766 } 767 child = add_regulator_linked(regulator, &usb_fixed, 768 &usb3v3, 1, 769 features); 770 if (IS_ERR(child)) 771 return PTR_ERR(child); 772 } 773 774 pdata->usb->features = features; 775 776 child = add_child(0, "twl6030_usb", 777 pdata->usb, sizeof(*pdata->usb), 778 true, 779 /* irq1 = VBUS_PRES, irq0 = USB ID */ 780 irq_base + USBOTG_INTR_OFFSET, 781 irq_base + USB_PRES_INTR_OFFSET); 782 783 if (IS_ERR(child)) 784 return PTR_ERR(child); 785 /* we need to connect regulators to this transceiver */ 786 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) 787 usb3v3.dev_name = dev_name(child); 788 } else if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && 789 twl_class_is_6030()) { 790 if (features & TWL6025_SUBCLASS) 791 child = add_regulator(TWL6025_REG_LDOUSB, 792 pdata->ldousb, features); 793 else 794 child = add_regulator(TWL6030_REG_VUSB, 795 pdata->vusb, features); 796 797 if (IS_ERR(child)) 798 return PTR_ERR(child); 799 } 800 801 if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) { 802 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); 803 if (IS_ERR(child)) 804 return PTR_ERR(child); 805 } 806 807 if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) { 808 child = add_child(1, "twl4030_pwrbutton", 809 NULL, 0, true, irq_base + 8 + 0, 0); 810 if (IS_ERR(child)) 811 return PTR_ERR(child); 812 } 813 814 if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio && 815 twl_class_is_4030()) { 816 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid; 817 child = add_child(sub_chip_id, "twl4030-audio", 818 pdata->audio, sizeof(*pdata->audio), 819 false, 0, 0); 820 if (IS_ERR(child)) 821 return PTR_ERR(child); 822 } 823 824 /* twl4030 regulators */ 825 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) { 826 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1, 827 features); 828 if (IS_ERR(child)) 829 return PTR_ERR(child); 830 831 child = add_regulator(TWL4030_REG_VIO, pdata->vio, 832 features); 833 if (IS_ERR(child)) 834 return PTR_ERR(child); 835 836 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1, 837 features); 838 if (IS_ERR(child)) 839 return PTR_ERR(child); 840 841 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2, 842 features); 843 if (IS_ERR(child)) 844 return PTR_ERR(child); 845 846 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1, 847 features); 848 if (IS_ERR(child)) 849 return PTR_ERR(child); 850 851 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac, 852 features); 853 if (IS_ERR(child)) 854 return PTR_ERR(child); 855 856 child = add_regulator((features & TWL4030_VAUX2) 857 ? TWL4030_REG_VAUX2_4030 858 : TWL4030_REG_VAUX2, 859 pdata->vaux2, features); 860 if (IS_ERR(child)) 861 return PTR_ERR(child); 862 863 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1, 864 features); 865 if (IS_ERR(child)) 866 return PTR_ERR(child); 867 868 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2, 869 features); 870 if (IS_ERR(child)) 871 return PTR_ERR(child); 872 873 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig, 874 features); 875 if (IS_ERR(child)) 876 return PTR_ERR(child); 877 } 878 879 /* maybe add LDOs that are omitted on cost-reduced parts */ 880 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET) 881 && twl_class_is_4030()) { 882 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2, 883 features); 884 if (IS_ERR(child)) 885 return PTR_ERR(child); 886 887 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2, 888 features); 889 if (IS_ERR(child)) 890 return PTR_ERR(child); 891 892 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim, 893 features); 894 if (IS_ERR(child)) 895 return PTR_ERR(child); 896 897 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1, 898 features); 899 if (IS_ERR(child)) 900 return PTR_ERR(child); 901 902 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3, 903 features); 904 if (IS_ERR(child)) 905 return PTR_ERR(child); 906 907 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4, 908 features); 909 if (IS_ERR(child)) 910 return PTR_ERR(child); 911 } 912 913 /* twl6030 regulators */ 914 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() && 915 !(features & TWL6025_SUBCLASS)) { 916 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1, 917 features); 918 if (IS_ERR(child)) 919 return PTR_ERR(child); 920 921 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2, 922 features); 923 if (IS_ERR(child)) 924 return PTR_ERR(child); 925 926 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3, 927 features); 928 if (IS_ERR(child)) 929 return PTR_ERR(child); 930 931 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8, 932 features); 933 if (IS_ERR(child)) 934 return PTR_ERR(child); 935 936 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1, 937 features); 938 if (IS_ERR(child)) 939 return PTR_ERR(child); 940 941 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc, 942 features); 943 if (IS_ERR(child)) 944 return PTR_ERR(child); 945 946 child = add_regulator(TWL6030_REG_VPP, pdata->vpp, 947 features); 948 if (IS_ERR(child)) 949 return PTR_ERR(child); 950 951 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim, 952 features); 953 if (IS_ERR(child)) 954 return PTR_ERR(child); 955 956 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio, 957 features); 958 if (IS_ERR(child)) 959 return PTR_ERR(child); 960 961 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac, 962 features); 963 if (IS_ERR(child)) 964 return PTR_ERR(child); 965 966 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1, 967 features); 968 if (IS_ERR(child)) 969 return PTR_ERR(child); 970 971 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2, 972 features); 973 if (IS_ERR(child)) 974 return PTR_ERR(child); 975 976 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3, 977 features); 978 if (IS_ERR(child)) 979 return PTR_ERR(child); 980 981 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg, 982 features); 983 if (IS_ERR(child)) 984 return PTR_ERR(child); 985 } 986 987 /* 6030 and 6025 share this regulator */ 988 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030()) { 989 child = add_regulator(TWL6030_REG_VANA, pdata->vana, 990 features); 991 if (IS_ERR(child)) 992 return PTR_ERR(child); 993 } 994 995 /* twl6025 regulators */ 996 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() && 997 (features & TWL6025_SUBCLASS)) { 998 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5, 999 features); 1000 if (IS_ERR(child)) 1001 return PTR_ERR(child); 1002 1003 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1, 1004 features); 1005 if (IS_ERR(child)) 1006 return PTR_ERR(child); 1007 1008 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7, 1009 features); 1010 if (IS_ERR(child)) 1011 return PTR_ERR(child); 1012 1013 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6, 1014 features); 1015 if (IS_ERR(child)) 1016 return PTR_ERR(child); 1017 1018 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln, 1019 features); 1020 if (IS_ERR(child)) 1021 return PTR_ERR(child); 1022 1023 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2, 1024 features); 1025 if (IS_ERR(child)) 1026 return PTR_ERR(child); 1027 1028 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4, 1029 features); 1030 if (IS_ERR(child)) 1031 return PTR_ERR(child); 1032 1033 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3, 1034 features); 1035 if (IS_ERR(child)) 1036 return PTR_ERR(child); 1037 1038 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3, 1039 features); 1040 if (IS_ERR(child)) 1041 return PTR_ERR(child); 1042 1043 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4, 1044 features); 1045 if (IS_ERR(child)) 1046 return PTR_ERR(child); 1047 1048 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025, 1049 features); 1050 if (IS_ERR(child)) 1051 return PTR_ERR(child); 1052 1053 } 1054 1055 if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci && 1056 !(features & (TPS_SUBSET | TWL5031))) { 1057 child = add_child(3, "twl4030_bci", 1058 pdata->bci, sizeof(*pdata->bci), false, 1059 /* irq0 = CHG_PRES, irq1 = BCI */ 1060 irq_base + BCI_PRES_INTR_OFFSET, 1061 irq_base + BCI_INTR_OFFSET); 1062 if (IS_ERR(child)) 1063 return PTR_ERR(child); 1064 } 1065 1066 return 0; 1067 } 1068 1069 /*----------------------------------------------------------------------*/ 1070 1071 /* 1072 * These three functions initialize the on-chip clock framework, 1073 * letting it generate the right frequencies for USB, MADC, and 1074 * other purposes. 1075 */ 1076 static inline int __init protect_pm_master(void) 1077 { 1078 int e = 0; 1079 1080 e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, 1081 TWL4030_PM_MASTER_PROTECT_KEY); 1082 return e; 1083 } 1084 1085 static inline int __init unprotect_pm_master(void) 1086 { 1087 int e = 0; 1088 1089 e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 1090 TWL4030_PM_MASTER_KEY_CFG1, 1091 TWL4030_PM_MASTER_PROTECT_KEY); 1092 e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 1093 TWL4030_PM_MASTER_KEY_CFG2, 1094 TWL4030_PM_MASTER_PROTECT_KEY); 1095 1096 return e; 1097 } 1098 1099 static void clocks_init(struct device *dev, 1100 struct twl4030_clock_init_data *clock) 1101 { 1102 int e = 0; 1103 struct clk *osc; 1104 u32 rate; 1105 u8 ctrl = HFCLK_FREQ_26_MHZ; 1106 1107 osc = clk_get(dev, "fck"); 1108 if (IS_ERR(osc)) { 1109 printk(KERN_WARNING "Skipping twl internal clock init and " 1110 "using bootloader value (unknown osc rate)\n"); 1111 return; 1112 } 1113 1114 rate = clk_get_rate(osc); 1115 clk_put(osc); 1116 1117 switch (rate) { 1118 case 19200000: 1119 ctrl = HFCLK_FREQ_19p2_MHZ; 1120 break; 1121 case 26000000: 1122 ctrl = HFCLK_FREQ_26_MHZ; 1123 break; 1124 case 38400000: 1125 ctrl = HFCLK_FREQ_38p4_MHZ; 1126 break; 1127 } 1128 1129 ctrl |= HIGH_PERF_SQ; 1130 if (clock && clock->ck32k_lowpwr_enable) 1131 ctrl |= CK32K_LOWPWR_EN; 1132 1133 e |= unprotect_pm_master(); 1134 /* effect->MADC+USB ck en */ 1135 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); 1136 e |= protect_pm_master(); 1137 1138 if (e < 0) 1139 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); 1140 } 1141 1142 /*----------------------------------------------------------------------*/ 1143 1144 1145 static int twl_remove(struct i2c_client *client) 1146 { 1147 unsigned i, num_slaves; 1148 int status; 1149 1150 if (twl_class_is_4030()) { 1151 status = twl4030_exit_irq(); 1152 num_slaves = TWL_NUM_SLAVES; 1153 } else { 1154 status = twl6030_exit_irq(); 1155 num_slaves = TWL_NUM_SLAVES - 1; 1156 } 1157 1158 if (status < 0) 1159 return status; 1160 1161 for (i = 0; i < num_slaves; i++) { 1162 struct twl_client *twl = &twl_modules[i]; 1163 1164 if (twl->client && twl->client != client) 1165 i2c_unregister_device(twl->client); 1166 twl_modules[i].client = NULL; 1167 } 1168 inuse = false; 1169 return 0; 1170 } 1171 1172 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */ 1173 static int __devinit 1174 twl_probe(struct i2c_client *client, const struct i2c_device_id *id) 1175 { 1176 struct twl4030_platform_data *pdata = client->dev.platform_data; 1177 struct device_node *node = client->dev.of_node; 1178 struct platform_device *pdev; 1179 int irq_base = 0; 1180 int status; 1181 unsigned i, num_slaves; 1182 1183 pdev = platform_device_alloc(DRIVER_NAME, -1); 1184 if (!pdev) { 1185 dev_err(&client->dev, "can't alloc pdev\n"); 1186 return -ENOMEM; 1187 } 1188 1189 status = platform_device_add(pdev); 1190 if (status) { 1191 platform_device_put(pdev); 1192 return status; 1193 } 1194 1195 if (node && !pdata) { 1196 /* 1197 * XXX: Temporary pdata until the information is correctly 1198 * retrieved by every TWL modules from DT. 1199 */ 1200 pdata = devm_kzalloc(&client->dev, 1201 sizeof(struct twl4030_platform_data), 1202 GFP_KERNEL); 1203 if (!pdata) { 1204 status = -ENOMEM; 1205 goto free; 1206 } 1207 } 1208 1209 if (!pdata) { 1210 dev_dbg(&client->dev, "no platform data?\n"); 1211 status = -EINVAL; 1212 goto free; 1213 } 1214 1215 platform_set_drvdata(pdev, pdata); 1216 1217 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { 1218 dev_dbg(&client->dev, "can't talk I2C?\n"); 1219 status = -EIO; 1220 goto free; 1221 } 1222 1223 if (inuse) { 1224 dev_dbg(&client->dev, "driver is already in use\n"); 1225 status = -EBUSY; 1226 goto free; 1227 } 1228 1229 if ((id->driver_data) & TWL6030_CLASS) { 1230 twl_id = TWL6030_CLASS_ID; 1231 twl_map = &twl6030_map[0]; 1232 num_slaves = TWL_NUM_SLAVES - 1; 1233 } else { 1234 twl_id = TWL4030_CLASS_ID; 1235 twl_map = &twl4030_map[0]; 1236 num_slaves = TWL_NUM_SLAVES; 1237 } 1238 1239 for (i = 0; i < num_slaves; i++) { 1240 struct twl_client *twl = &twl_modules[i]; 1241 1242 twl->address = client->addr + i; 1243 if (i == 0) { 1244 twl->client = client; 1245 } else { 1246 twl->client = i2c_new_dummy(client->adapter, 1247 twl->address); 1248 if (!twl->client) { 1249 dev_err(&client->dev, 1250 "can't attach client %d\n", i); 1251 status = -ENOMEM; 1252 goto fail; 1253 } 1254 } 1255 mutex_init(&twl->xfer_lock); 1256 } 1257 1258 inuse = true; 1259 1260 /* setup clock framework */ 1261 clocks_init(&pdev->dev, pdata->clock); 1262 1263 /* read TWL IDCODE Register */ 1264 if (twl_id == TWL4030_CLASS_ID) { 1265 status = twl_read_idcode_register(); 1266 WARN(status < 0, "Error: reading twl_idcode register value\n"); 1267 } 1268 1269 /* load power event scripts */ 1270 if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) 1271 twl4030_power_init(pdata->power); 1272 1273 /* Maybe init the T2 Interrupt subsystem */ 1274 if (client->irq) { 1275 if (twl_class_is_4030()) { 1276 twl4030_init_chip_irq(id->name); 1277 irq_base = twl4030_init_irq(&client->dev, client->irq); 1278 } else { 1279 irq_base = twl6030_init_irq(&client->dev, client->irq); 1280 } 1281 1282 if (irq_base < 0) { 1283 status = irq_base; 1284 goto fail; 1285 } 1286 } 1287 1288 /* 1289 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface. 1290 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0, 1291 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0. 1292 */ 1293 if (twl_class_is_4030()) { 1294 u8 temp; 1295 1296 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1); 1297 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \ 1298 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU); 1299 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1); 1300 } 1301 1302 status = -ENODEV; 1303 if (node) 1304 status = of_platform_populate(node, NULL, NULL, &client->dev); 1305 if (status) 1306 status = add_children(pdata, irq_base, id->driver_data); 1307 1308 fail: 1309 if (status < 0) 1310 twl_remove(client); 1311 free: 1312 if (status < 0) 1313 platform_device_unregister(pdev); 1314 1315 return status; 1316 } 1317 1318 static const struct i2c_device_id twl_ids[] = { 1319 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ 1320 { "twl5030", 0 }, /* T2 updated */ 1321 { "twl5031", TWL5031 }, /* TWL5030 updated */ 1322 { "tps65950", 0 }, /* catalog version of twl5030 */ 1323 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ 1324 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ 1325 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED 1326 and vibrator. Charger in USB module*/ 1327 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ 1328 { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */ 1329 { /* end of list */ }, 1330 }; 1331 MODULE_DEVICE_TABLE(i2c, twl_ids); 1332 1333 /* One Client Driver , 4 Clients */ 1334 static struct i2c_driver twl_driver = { 1335 .driver.name = DRIVER_NAME, 1336 .id_table = twl_ids, 1337 .probe = twl_probe, 1338 .remove = twl_remove, 1339 }; 1340 1341 static int __init twl_init(void) 1342 { 1343 return i2c_add_driver(&twl_driver); 1344 } 1345 subsys_initcall(twl_init); 1346 1347 static void __exit twl_exit(void) 1348 { 1349 i2c_del_driver(&twl_driver); 1350 } 1351 module_exit(twl_exit); 1352 1353 MODULE_AUTHOR("Texas Instruments, Inc."); 1354 MODULE_DESCRIPTION("I2C Core interface for TWL"); 1355 MODULE_LICENSE("GPL"); 1356