drivers/mfd/twl-core.c

   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
  38 #include <linux/regulator/machine.h>
  39
  40 #include <linux/i2c.h>
  41 #include <linux/i2c/twl.h>
  42
  43 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  44 #include <plat/cpu.h>
  45 #endif
  46
  47 /*
  48  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  49  * Management and System Companion Device" chips originally designed for
  50  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  51  * often at around 3 Mbit/sec, including for interrupt handling.
  52  *
  53  * This driver core provides genirq support for the interrupts emitted,
  54  * by the various modules, and exports register access primitives.
  55  *
  56  * FIXME this driver currently requires use of the first interrupt line
  57  * (and associated registers).
  58  */
  59
  60 #define DRIVER_NAME                     "twl"
  61
  62 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  63 #define twl_has_keypad()        true
  64 #else
  65 #define twl_has_keypad()        false
  66 #endif
  67
  68 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  69 #define twl_has_gpio()  true
  70 #else
  71 #define twl_has_gpio()  false
  72 #endif
  73
  74 #if defined(CONFIG_REGULATOR_TWL4030) \
  75         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  76 #define twl_has_regulator()     true
  77 #else
  78 #define twl_has_regulator()     false
  79 #endif
  80
  81 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  82 #define twl_has_madc()  true
  83 #else
  84 #define twl_has_madc()  false
  85 #endif
  86
  87 #ifdef CONFIG_TWL4030_POWER
  88 #define twl_has_power()        true
  89 #else
  90 #define twl_has_power()        false
  91 #endif
  92
  93 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  94 #define twl_has_rtc()   true
  95 #else
  96 #define twl_has_rtc()   false
  97 #endif
  98
  99 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 100         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 101 #define twl_has_usb()   true
 102 #else
 103 #define twl_has_usb()   false
 104 #endif
 105
 106 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 107         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 108 #define twl_has_watchdog()        true
 109 #else
 110 #define twl_has_watchdog()        false
 111 #endif
 112
 113 #if defined(CONFIG_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_MODULE) ||\
 114         defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
 115 #define twl_has_codec() true
 116 #else
 117 #define twl_has_codec() false
 118 #endif
 119
 120 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 121 #define twl_has_bci()   true
 122 #else
 123 #define twl_has_bci()   false
 124 #endif
 125
 126 /* Triton Core internal information (BEGIN) */
 127
 128 /* Last - for index max*/
 129 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 130
 131 #define TWL_NUM_SLAVES          4
 132
 133 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 134         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 135 #define twl_has_pwrbutton()     true
 136 #else
 137 #define twl_has_pwrbutton()     false
 138 #endif
 139
 140 #define SUB_CHIP_ID0 0
 141 #define SUB_CHIP_ID1 1
 142 #define SUB_CHIP_ID2 2
 143 #define SUB_CHIP_ID3 3
 144
 145 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 146
 147 /* Base Address defns for twl4030_map[] */
 148
 149 /* subchip/slave 0 - USB ID */
 150 #define TWL4030_BASEADD_USB             0x0000
 151
 152 /* subchip/slave 1 - AUD ID */
 153 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 154 #define TWL4030_BASEADD_GPIO            0x0098
 155 #define TWL4030_BASEADD_INTBR           0x0085
 156 #define TWL4030_BASEADD_PIH             0x0080
 157 #define TWL4030_BASEADD_TEST            0x004C
 158
 159 /* subchip/slave 2 - AUX ID */
 160 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 161 #define TWL4030_BASEADD_LED             0x00EE
 162 #define TWL4030_BASEADD_MADC            0x0000
 163 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 164 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 165 #define TWL4030_BASEADD_PWM0            0x00F8
 166 #define TWL4030_BASEADD_PWM1            0x00FB
 167 #define TWL4030_BASEADD_PWMA            0x00EF
 168 #define TWL4030_BASEADD_PWMB            0x00F1
 169 #define TWL4030_BASEADD_KEYPAD          0x00D2
 170
 171 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 172 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 173                                                   one */
 174
 175 /* subchip/slave 3 - POWER ID */
 176 #define TWL4030_BASEADD_BACKUP          0x0014
 177 #define TWL4030_BASEADD_INT             0x002E
 178 #define TWL4030_BASEADD_PM_MASTER       0x0036
 179 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 180 #define TWL4030_BASEADD_RTC             0x001C
 181 #define TWL4030_BASEADD_SECURED_REG     0x0000
 182
 183 /* Triton Core internal information (END) */
 184
 185
 186 /* subchip/slave 0 0x48 - POWER */
 187 #define TWL6030_BASEADD_RTC             0x0000
 188 #define TWL6030_BASEADD_MEM             0x0017
 189 #define TWL6030_BASEADD_PM_MASTER       0x001F
 190 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 191 #define TWL6030_BASEADD_PM_MISC         0x00E2
 192 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 193
 194 /* subchip/slave 1 0x49 - FEATURE */
 195 #define TWL6030_BASEADD_USB             0x0000
 196 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 197 #define TWL6030_BASEADD_AUX             0x0090
 198 #define TWL6030_BASEADD_PWM             0x00BA
 199 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 200 #define TWL6030_BASEADD_PIH             0x00D0
 201 #define TWL6030_BASEADD_CHARGER         0x00E0
 202 #define TWL6025_BASEADD_CHARGER         0x00DA
 203
 204 /* subchip/slave 2 0x4A - DFT */
 205 #define TWL6030_BASEADD_DIEID           0x00C0
 206
 207 /* subchip/slave 3 0x4B - AUDIO */
 208 #define TWL6030_BASEADD_AUDIO           0x0000
 209 #define TWL6030_BASEADD_RSV             0x0000
 210 #define TWL6030_BASEADD_ZERO            0x0000
 211
 212 /* Few power values */
 213 #define R_CFG_BOOT                      0x05
 214
 215 /* some fields in R_CFG_BOOT */
 216 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 217 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 218 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 219 #define HIGH_PERF_SQ                    (1 << 3)
 220 #define CK32K_LOWPWR_EN                 (1 << 7)
 221
 222
 223 /* chip-specific feature flags, for i2c_device_id.driver_data */
 224 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 225 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 226 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 227 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 228
 229 /*----------------------------------------------------------------------*/
 230
 231 /* is driver active, bound to a chip? */
 232 static bool inuse;
 233
 234 /* TWL IDCODE Register value */
 235 static u32 twl_idcode;
 236
 237 static unsigned int twl_id;
 238 unsigned int twl_rev(void)
 239 {
 240         return twl_id;
 241 }
 242 EXPORT_SYMBOL(twl_rev);
 243
 244 /* Structure for each TWL4030/TWL6030 Slave */
 245 struct twl_client {
 246         struct i2c_client *client;
 247         u8 address;
 248
 249         /* max numb of i2c_msg required is for read =2 */
 250         struct i2c_msg xfer_msg[2];
 251
 252         /* To lock access to xfer_msg */
 253         struct mutex xfer_lock;
 254 };
 255
 256 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 257
 258
 259 /* mapping the module id to slave id and base address */
 260 struct twl_mapping {
 261         unsigned char sid;      /* Slave ID */
 262         unsigned char base;     /* base address */
 263 };
 264 static struct twl_mapping *twl_map;
 265
 266 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 267         /*
 268          * NOTE:  don't change this table without updating the
 269          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 270          * so they continue to match the order in this table.
 271          */
 272
 273         { 0, TWL4030_BASEADD_USB },
 274
 275         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 276         { 1, TWL4030_BASEADD_GPIO },
 277         { 1, TWL4030_BASEADD_INTBR },
 278         { 1, TWL4030_BASEADD_PIH },
 279         { 1, TWL4030_BASEADD_TEST },
 280
 281         { 2, TWL4030_BASEADD_KEYPAD },
 282         { 2, TWL4030_BASEADD_MADC },
 283         { 2, TWL4030_BASEADD_INTERRUPTS },
 284         { 2, TWL4030_BASEADD_LED },
 285         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 286         { 2, TWL4030_BASEADD_PRECHARGE },
 287         { 2, TWL4030_BASEADD_PWM0 },
 288         { 2, TWL4030_BASEADD_PWM1 },
 289         { 2, TWL4030_BASEADD_PWMA },
 290         { 2, TWL4030_BASEADD_PWMB },
 291         { 2, TWL5031_BASEADD_ACCESSORY },
 292         { 2, TWL5031_BASEADD_INTERRUPTS },
 293
 294         { 3, TWL4030_BASEADD_BACKUP },
 295         { 3, TWL4030_BASEADD_INT },
 296         { 3, TWL4030_BASEADD_PM_MASTER },
 297         { 3, TWL4030_BASEADD_PM_RECEIVER },
 298         { 3, TWL4030_BASEADD_RTC },
 299         { 3, TWL4030_BASEADD_SECURED_REG },
 300 };
 301
 302 static struct twl_mapping twl6030_map[] = {
 303         /*
 304          * NOTE:  don't change this table without updating the
 305          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 306          * so they continue to match the order in this table.
 307          */
 308         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 309         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 310         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 311         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 312         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 313
 314         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 315         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 316         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 317         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 318         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 319
 320         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 321         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 322         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 323         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 324         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 325
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 327         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 328         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 329         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 330         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 331         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 332         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 333
 334         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 335         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 336         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 337 };
 338
 339 /*----------------------------------------------------------------------*/
 340
 341 /* Exported Functions */
 342
 343 /**
 344  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 345  * @mod_no: module number
 346  * @value: an array of num_bytes+1 containing data to write
 347  * @reg: register address (just offset will do)
 348  * @num_bytes: number of bytes to transfer
 349  *
 350  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 351  * valid data starts at Offset 1.
 352  *
 353  * Returns the result of operation - 0 is success
 354  */
 355 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 356 {
 357         int ret;
 358         int sid;
 359         struct twl_client *twl;
 360         struct i2c_msg *msg;
 361
 362         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 363                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 364                 return -EPERM;
 365         }
 366         if (unlikely(!inuse)) {
 367                 pr_err("%s: not initialized\n", DRIVER_NAME);
 368                 return -EPERM;
 369         }
 370         sid = twl_map[mod_no].sid;
 371         twl = &twl_modules[sid];
 372
 373         mutex_lock(&twl->xfer_lock);
 374         /*
 375          * [MSG1]: fill the register address data
 376          * fill the data Tx buffer
 377          */
 378         msg = &twl->xfer_msg[0];
 379         msg->addr = twl->address;
 380         msg->len = num_bytes + 1;
 381         msg->flags = 0;
 382         msg->buf = value;
 383         /* over write the first byte of buffer with the register address */
 384         *value = twl_map[mod_no].base + reg;
 385         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 386         mutex_unlock(&twl->xfer_lock);
 387
 388         /* i2c_transfer returns number of messages transferred */
 389         if (ret != 1) {
 390                 pr_err("%s: i2c_write failed to transfer all messages\n",
 391                         DRIVER_NAME);
 392                 if (ret < 0)
 393                         return ret;
 394                 else
 395                         return -EIO;
 396         } else {
 397                 return 0;
 398         }
 399 }
 400 EXPORT_SYMBOL(twl_i2c_write);
 401
 402 /**
 403  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 404  * @mod_no: module number
 405  * @value: an array of num_bytes containing data to be read
 406  * @reg: register address (just offset will do)
 407  * @num_bytes: number of bytes to transfer
 408  *
 409  * Returns result of operation - num_bytes is success else failure.
 410  */
 411 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 412 {
 413         int ret;
 414         u8 val;
 415         int sid;
 416         struct twl_client *twl;
 417         struct i2c_msg *msg;
 418
 419         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 420                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 421                 return -EPERM;
 422         }
 423         if (unlikely(!inuse)) {
 424                 pr_err("%s: not initialized\n", DRIVER_NAME);
 425                 return -EPERM;
 426         }
 427         sid = twl_map[mod_no].sid;
 428         twl = &twl_modules[sid];
 429
 430         mutex_lock(&twl->xfer_lock);
 431         /* [MSG1] fill the register address data */
 432         msg = &twl->xfer_msg[0];
 433         msg->addr = twl->address;
 434         msg->len = 1;
 435         msg->flags = 0; /* Read the register value */
 436         val = twl_map[mod_no].base + reg;
 437         msg->buf = &val;
 438         /* [MSG2] fill the data rx buffer */
 439         msg = &twl->xfer_msg[1];
 440         msg->addr = twl->address;
 441         msg->flags = I2C_M_RD;  /* Read the register value */
 442         msg->len = num_bytes;   /* only n bytes */
 443         msg->buf = value;
 444         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 445         mutex_unlock(&twl->xfer_lock);
 446
 447         /* i2c_transfer returns number of messages transferred */
 448         if (ret != 2) {
 449                 pr_err("%s: i2c_read failed to transfer all messages\n",
 450                         DRIVER_NAME);
 451                 if (ret < 0)
 452                         return ret;
 453                 else
 454                         return -EIO;
 455         } else {
 456                 return 0;
 457         }
 458 }
 459 EXPORT_SYMBOL(twl_i2c_read);
 460
 461 /**
 462  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 463  * @mod_no: module number
 464  * @value: the value to be written 8 bit
 465  * @reg: register address (just offset will do)
 466  *
 467  * Returns result of operation - 0 is success
 468  */
 469 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 470 {
 471
 472         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 473         u8 temp_buffer[2] = { 0 };
 474         /* offset 1 contains the data */
 475         temp_buffer[1] = value;
 476         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 477 }
 478 EXPORT_SYMBOL(twl_i2c_write_u8);
 479
 480 /**
 481  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 482  * @mod_no: module number
 483  * @value: the value read 8 bit
 484  * @reg: register address (just offset will do)
 485  *
 486  * Returns result of operation - 0 is success
 487  */
 488 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 489 {
 490         return twl_i2c_read(mod_no, value, reg, 1);
 491 }
 492 EXPORT_SYMBOL(twl_i2c_read_u8);
 493
 494 /*----------------------------------------------------------------------*/
 495
 496 /**
 497  * twl_read_idcode_register - API to read the IDCODE register.
 498  *
 499  * Unlocks the IDCODE register and read the 32 bit value.
 500  */
 501 static int twl_read_idcode_register(void)
 502 {
 503         int err;
 504
 505         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 506                                                 REG_UNLOCK_TEST_REG);
 507         if (err) {
 508                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 509                 goto fail;
 510         }
 511
 512         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 513                                                 REG_IDCODE_7_0, 4);
 514         if (err) {
 515                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 516                 goto fail;
 517         }
 518
 519         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 520         if (err)
 521                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 522 fail:
 523         return err;
 524 }
 525
 526 /**
 527  * twl_get_type - API to get TWL Si type.
 528  *
 529  * Api to get the TWL Si type from IDCODE value.
 530  */
 531 int twl_get_type(void)
 532 {
 533         return TWL_SIL_TYPE(twl_idcode);
 534 }
 535 EXPORT_SYMBOL_GPL(twl_get_type);
 536
 537 /**
 538  * twl_get_version - API to get TWL Si version.
 539  *
 540  * Api to get the TWL Si version from IDCODE value.
 541  */
 542 int twl_get_version(void)
 543 {
 544         return TWL_SIL_REV(twl_idcode);
 545 }
 546 EXPORT_SYMBOL_GPL(twl_get_version);
 547
 548 static struct device *
 549 add_numbered_child(unsigned chip, const char *name, int num,
 550                 void *pdata, unsigned pdata_len,
 551                 bool can_wakeup, int irq0, int irq1)
 552 {
 553         struct platform_device  *pdev;
 554         struct twl_client       *twl = &twl_modules[chip];
 555         int                     status;
 556
 557         pdev = platform_device_alloc(name, num);
 558         if (!pdev) {
 559                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 560                 status = -ENOMEM;
 561                 goto err;
 562         }
 563
 564         device_init_wakeup(&pdev->dev, can_wakeup);
 565         pdev->dev.parent = &twl->client->dev;
 566
 567         if (pdata) {
 568                 status = platform_device_add_data(pdev, pdata, pdata_len);
 569                 if (status < 0) {
 570                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 571                         goto err;
 572                 }
 573         }
 574
 575         if (irq0) {
 576                 struct resource r[2] = {
 577                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 578                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 579                 };
 580
 581                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 582                 if (status < 0) {
 583                         dev_dbg(&pdev->dev, "can't add irqs\n");
 584                         goto err;
 585                 }
 586         }
 587
 588         status = platform_device_add(pdev);
 589
 590 err:
 591         if (status < 0) {
 592                 platform_device_put(pdev);
 593                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 594                 return ERR_PTR(status);
 595         }
 596         return &pdev->dev;
 597 }
 598
 599 static inline struct device *add_child(unsigned chip, const char *name,
 600                 void *pdata, unsigned pdata_len,
 601                 bool can_wakeup, int irq0, int irq1)
 602 {
 603         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 604                 can_wakeup, irq0, irq1);
 605 }
 606
 607 static struct device *
 608 add_regulator_linked(int num, struct regulator_init_data *pdata,
 609                 struct regulator_consumer_supply *consumers,
 610                 unsigned num_consumers, unsigned long features)
 611 {
 612         unsigned sub_chip_id;
 613         struct twl_regulator_driver_data drv_data;
 614
 615         /* regulator framework demands init_data ... */
 616         if (!pdata)
 617                 return NULL;
 618
 619         if (consumers) {
 620                 pdata->consumer_supplies = consumers;
 621                 pdata->num_consumer_supplies = num_consumers;
 622         }
 623
 624         if (pdata->driver_data) {
 625                 /* If we have existing drv_data, just add the flags */
 626                 struct twl_regulator_driver_data *tmp;
 627                 tmp = pdata->driver_data;
 628                 tmp->features |= features;
 629         } else {
 630                 /* add new driver data struct, used only during init */
 631                 drv_data.features = features;
 632                 drv_data.set_voltage = NULL;
 633                 drv_data.get_voltage = NULL;
 634                 drv_data.data = NULL;
 635                 pdata->driver_data = &drv_data;
 636         }
 637
 638         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 639         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 640         return add_numbered_child(sub_chip_id, "twl_reg", num,
 641                 pdata, sizeof(*pdata), false, 0, 0);
 642 }
 643
 644 static struct device *
 645 add_regulator(int num, struct regulator_init_data *pdata,
 646                 unsigned long features)
 647 {
 648         return add_regulator_linked(num, pdata, NULL, 0, features);
 649 }
 650
 651 /*
 652  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 653  * for the PIH, and the next are for the PWR_INT SIH, since
 654  * that's how twl_init_irq() sets things up.
 655  */
 656
 657 static int
 658 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 659 {
 660         struct device   *child;
 661         unsigned sub_chip_id;
 662
 663         if (twl_has_gpio() && pdata->gpio) {
 664                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 665                                 pdata->gpio, sizeof(*pdata->gpio),
 666                                 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
 667                 if (IS_ERR(child))
 668                         return PTR_ERR(child);
 669         }
 670
 671         if (twl_has_keypad() && pdata->keypad) {
 672                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 673                                 pdata->keypad, sizeof(*pdata->keypad),
 674                                 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
 675                 if (IS_ERR(child))
 676                         return PTR_ERR(child);
 677         }
 678
 679         if (twl_has_madc() && pdata->madc) {
 680                 child = add_child(2, "twl4030_madc",
 681                                 pdata->madc, sizeof(*pdata->madc),
 682                                 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
 683                 if (IS_ERR(child))
 684                         return PTR_ERR(child);
 685         }
 686
 687         if (twl_has_rtc()) {
 688                 /*
 689                  * REVISIT platform_data here currently might expose the
 690                  * "msecure" line ... but for now we just expect board
 691                  * setup to tell the chip "it's always ok to SET_TIME".
 692                  * Eventually, Linux might become more aware of such
 693                  * HW security concerns, and "least privilege".
 694                  */
 695                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 696                 child = add_child(sub_chip_id, "twl_rtc",
 697                                 NULL, 0,
 698                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
 699                 if (IS_ERR(child))
 700                         return PTR_ERR(child);
 701         }
 702
 703         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 704
 705                 static struct regulator_consumer_supply usb1v5 = {
 706                         .supply =       "usb1v5",
 707                 };
 708                 static struct regulator_consumer_supply usb1v8 = {
 709                         .supply =       "usb1v8",
 710                 };
 711                 static struct regulator_consumer_supply usb3v1 = {
 712                         .supply =       "usb3v1",
 713                 };
 714
 715         /* First add the regulators so that they can be used by transceiver */
 716                 if (twl_has_regulator()) {
 717                         /* this is a template that gets copied */
 718                         struct regulator_init_data usb_fixed = {
 719                                 .constraints.valid_modes_mask =
 720                                         REGULATOR_MODE_NORMAL
 721                                         | REGULATOR_MODE_STANDBY,
 722                                 .constraints.valid_ops_mask =
 723                                         REGULATOR_CHANGE_MODE
 724                                         | REGULATOR_CHANGE_STATUS,
 725                         };
 726
 727                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 728                                                       &usb_fixed, &usb1v5, 1,
 729                                                       features);
 730                         if (IS_ERR(child))
 731                                 return PTR_ERR(child);
 732
 733                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 734                                                       &usb_fixed, &usb1v8, 1,
 735                                                       features);
 736                         if (IS_ERR(child))
 737                                 return PTR_ERR(child);
 738
 739                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 740                                                       &usb_fixed, &usb3v1, 1,
 741                                                       features);
 742                         if (IS_ERR(child))
 743                                 return PTR_ERR(child);
 744
 745                 }
 746
 747                 child = add_child(0, "twl4030_usb",
 748                                 pdata->usb, sizeof(*pdata->usb),
 749                                 true,
 750                                 /* irq0 = USB_PRES, irq1 = USB */
 751                                 pdata->irq_base + USB_PRES_INTR_OFFSET,
 752                                 pdata->irq_base + USB_INTR_OFFSET);
 753
 754                 if (IS_ERR(child))
 755                         return PTR_ERR(child);
 756
 757                 /* we need to connect regulators to this transceiver */
 758                 if (twl_has_regulator() && child) {
 759                         usb1v5.dev = child;
 760                         usb1v8.dev = child;
 761                         usb3v1.dev = child;
 762                 }
 763         }
 764         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 765
 766                 static struct regulator_consumer_supply usb3v3;
 767                 int regulator;
 768
 769                 if (twl_has_regulator()) {
 770                         /* this is a template that gets copied */
 771                         struct regulator_init_data usb_fixed = {
 772                                 .constraints.valid_modes_mask =
 773                                         REGULATOR_MODE_NORMAL
 774                                         | REGULATOR_MODE_STANDBY,
 775                                 .constraints.valid_ops_mask =
 776                                         REGULATOR_CHANGE_MODE
 777                                         | REGULATOR_CHANGE_STATUS,
 778                         };
 779
 780                         if (features & TWL6025_SUBCLASS) {
 781                                 usb3v3.supply = "ldousb";
 782                                 regulator = TWL6025_REG_LDOUSB;
 783                         } else {
 784                                 usb3v3.supply = "vusb";
 785                                 regulator = TWL6030_REG_VUSB;
 786                         }
 787                         child = add_regulator_linked(regulator, &usb_fixed,
 788                                                         &usb3v3, 1,
 789                                                         features);
 790                         if (IS_ERR(child))
 791                                 return PTR_ERR(child);
 792                 }
 793
 794                 pdata->usb->features = features;
 795
 796                 child = add_child(0, "twl6030_usb",
 797                         pdata->usb, sizeof(*pdata->usb),
 798                         true,
 799                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 800                         pdata->irq_base + USBOTG_INTR_OFFSET,
 801                         pdata->irq_base + USB_PRES_INTR_OFFSET);
 802
 803                 if (IS_ERR(child))
 804                         return PTR_ERR(child);
 805                 /* we need to connect regulators to this transceiver */
 806                 if (twl_has_regulator() && child)
 807                         usb3v3.dev = child;
 808         } else if (twl_has_regulator() && twl_class_is_6030()) {
 809                 if (features & TWL6025_SUBCLASS)
 810                         child = add_regulator(TWL6025_REG_LDOUSB,
 811                                                 pdata->ldousb, features);
 812                 else
 813                         child = add_regulator(TWL6030_REG_VUSB,
 814                                                 pdata->vusb, features);
 815
 816                         if (IS_ERR(child))
 817                                         return PTR_ERR(child);
 818         }
 819
 820         if (twl_has_watchdog() && twl_class_is_4030()) {
 821                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 822                 if (IS_ERR(child))
 823                         return PTR_ERR(child);
 824         }
 825
 826         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 827                 child = add_child(1, "twl4030_pwrbutton",
 828                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 829                 if (IS_ERR(child))
 830                         return PTR_ERR(child);
 831         }
 832
 833         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 834                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 835                 child = add_child(sub_chip_id, "twl4030-audio",
 836                                 pdata->audio, sizeof(*pdata->audio),
 837                                 false, 0, 0);
 838                 if (IS_ERR(child))
 839                         return PTR_ERR(child);
 840         }
 841
 842         if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
 843                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 844                 child = add_child(sub_chip_id, "twl6040",
 845                                 pdata->audio, sizeof(*pdata->audio),
 846                                 false, 0, 0);
 847                 if (IS_ERR(child))
 848                         return PTR_ERR(child);
 849         }
 850
 851         /* twl4030 regulators */
 852         if (twl_has_regulator() && twl_class_is_4030()) {
 853                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 854                                         features);
 855                 if (IS_ERR(child))
 856                         return PTR_ERR(child);
 857
 858                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 859                                         features);
 860                 if (IS_ERR(child))
 861                         return PTR_ERR(child);
 862
 863                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 864                                         features);
 865                 if (IS_ERR(child))
 866                         return PTR_ERR(child);
 867
 868                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 869                                         features);
 870                 if (IS_ERR(child))
 871                         return PTR_ERR(child);
 872
 873                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 874                                         features);
 875                 if (IS_ERR(child))
 876                         return PTR_ERR(child);
 877
 878                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 879                                         features);
 880                 if (IS_ERR(child))
 881                         return PTR_ERR(child);
 882
 883                 child = add_regulator((features & TWL4030_VAUX2)
 884                                         ? TWL4030_REG_VAUX2_4030
 885                                         : TWL4030_REG_VAUX2,
 886                                 pdata->vaux2, features);
 887                 if (IS_ERR(child))
 888                         return PTR_ERR(child);
 889
 890                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 891                                         features);
 892                 if (IS_ERR(child))
 893                         return PTR_ERR(child);
 894
 895                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 896                                         features);
 897                 if (IS_ERR(child))
 898                         return PTR_ERR(child);
 899
 900                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 901                                         features);
 902                 if (IS_ERR(child))
 903                         return PTR_ERR(child);
 904         }
 905
 906         /* maybe add LDOs that are omitted on cost-reduced parts */
 907         if (twl_has_regulator() && !(features & TPS_SUBSET)
 908           && twl_class_is_4030()) {
 909                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 910                                         features);
 911                 if (IS_ERR(child))
 912                         return PTR_ERR(child);
 913
 914                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 915                                         features);
 916                 if (IS_ERR(child))
 917                         return PTR_ERR(child);
 918
 919                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 920                                         features);
 921                 if (IS_ERR(child))
 922                         return PTR_ERR(child);
 923
 924                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 925                                         features);
 926                 if (IS_ERR(child))
 927                         return PTR_ERR(child);
 928
 929                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 930                                         features);
 931                 if (IS_ERR(child))
 932                         return PTR_ERR(child);
 933
 934                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 935                                         features);
 936                 if (IS_ERR(child))
 937                         return PTR_ERR(child);
 938         }
 939
 940         /* twl6030 regulators */
 941         if (twl_has_regulator() && twl_class_is_6030() &&
 942                         !(features & TWL6025_SUBCLASS)) {
 943                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 944                                         features);
 945                 if (IS_ERR(child))
 946                         return PTR_ERR(child);
 947
 948                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 949                                         features);
 950                 if (IS_ERR(child))
 951                         return PTR_ERR(child);
 952
 953                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 954                                         features);
 955                 if (IS_ERR(child))
 956                         return PTR_ERR(child);
 957
 958                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 959                                         features);
 960                 if (IS_ERR(child))
 961                         return PTR_ERR(child);
 962
 963                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 964                                         features);
 965                 if (IS_ERR(child))
 966                         return PTR_ERR(child);
 967
 968                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 969                                         features);
 970                 if (IS_ERR(child))
 971                         return PTR_ERR(child);
 972
 973                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
 974                                         features);
 975                 if (IS_ERR(child))
 976                         return PTR_ERR(child);
 977
 978                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
 979                                         features);
 980                 if (IS_ERR(child))
 981                         return PTR_ERR(child);
 982
 983                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
 984                                         features);
 985                 if (IS_ERR(child))
 986                         return PTR_ERR(child);
 987         }
 988
 989         /* 6030 and 6025 share this regulator */
 990         if (twl_has_regulator() && twl_class_is_6030()) {
 991                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
 992                                         features);
 993                 if (IS_ERR(child))
 994                         return PTR_ERR(child);
 995         }
 996
 997         /* twl6025 regulators */
 998         if (twl_has_regulator() && twl_class_is_6030() &&
 999                         (features & TWL6025_SUBCLASS)) {
1000                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1001                                         features);
1002                 if (IS_ERR(child))
1003                         return PTR_ERR(child);
1004
1005                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1006                                         features);
1007                 if (IS_ERR(child))
1008                         return PTR_ERR(child);
1009
1010                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1011                                         features);
1012                 if (IS_ERR(child))
1013                         return PTR_ERR(child);
1014
1015                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1016                                         features);
1017                 if (IS_ERR(child))
1018                         return PTR_ERR(child);
1019
1020                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1021                                         features);
1022                 if (IS_ERR(child))
1023                         return PTR_ERR(child);
1024
1025                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1026                                         features);
1027                 if (IS_ERR(child))
1028                         return PTR_ERR(child);
1029
1030                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1031                                         features);
1032                 if (IS_ERR(child))
1033                         return PTR_ERR(child);
1034
1035                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1036                                         features);
1037                 if (IS_ERR(child))
1038                         return PTR_ERR(child);
1039
1040                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1041                                         features);
1042                 if (IS_ERR(child))
1043                         return PTR_ERR(child);
1044
1045                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1046                                         features);
1047                 if (IS_ERR(child))
1048                         return PTR_ERR(child);
1049
1050                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1051                                         features);
1052                 if (IS_ERR(child))
1053                         return PTR_ERR(child);
1054
1055         }
1056
1057         if (twl_has_bci() && pdata->bci &&
1058                         !(features & (TPS_SUBSET | TWL5031))) {
1059                 child = add_child(3, "twl4030_bci",
1060                                 pdata->bci, sizeof(*pdata->bci), false,
1061                                 /* irq0 = CHG_PRES, irq1 = BCI */
1062                                 pdata->irq_base + BCI_PRES_INTR_OFFSET,
1063                                 pdata->irq_base + BCI_INTR_OFFSET);
1064                 if (IS_ERR(child))
1065                         return PTR_ERR(child);
1066         }
1067
1068         return 0;
1069 }
1070
1071 /*----------------------------------------------------------------------*/
1072
1073 /*
1074  * These three functions initialize the on-chip clock framework,
1075  * letting it generate the right frequencies for USB, MADC, and
1076  * other purposes.
1077  */
1078 static inline int __init protect_pm_master(void)
1079 {
1080         int e = 0;
1081
1082         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1083                         TWL4030_PM_MASTER_PROTECT_KEY);
1084         return e;
1085 }
1086
1087 static inline int __init unprotect_pm_master(void)
1088 {
1089         int e = 0;
1090
1091         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1092                         TWL4030_PM_MASTER_KEY_CFG1,
1093                         TWL4030_PM_MASTER_PROTECT_KEY);
1094         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1095                         TWL4030_PM_MASTER_KEY_CFG2,
1096                         TWL4030_PM_MASTER_PROTECT_KEY);
1097
1098         return e;
1099 }
1100
1101 static void clocks_init(struct device *dev,
1102                         struct twl4030_clock_init_data *clock)
1103 {
1104         int e = 0;
1105         struct clk *osc;
1106         u32 rate;
1107         u8 ctrl = HFCLK_FREQ_26_MHZ;
1108
1109 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1110         if (cpu_is_omap2430())
1111                 osc = clk_get(dev, "osc_ck");
1112         else
1113                 osc = clk_get(dev, "osc_sys_ck");
1114
1115         if (IS_ERR(osc)) {
1116                 printk(KERN_WARNING "Skipping twl internal clock init and "
1117                                 "using bootloader value (unknown osc rate)\n");
1118                 return;
1119         }
1120
1121         rate = clk_get_rate(osc);
1122         clk_put(osc);
1123
1124 #else
1125         /* REVISIT for non-OMAP systems, pass the clock rate from
1126          * board init code, using platform_data.
1127          */
1128         osc = ERR_PTR(-EIO);
1129
1130         printk(KERN_WARNING "Skipping twl internal clock init and "
1131                "using bootloader value (unknown osc rate)\n");
1132
1133         return;
1134 #endif
1135
1136         switch (rate) {
1137         case 19200000:
1138                 ctrl = HFCLK_FREQ_19p2_MHZ;
1139                 break;
1140         case 26000000:
1141                 ctrl = HFCLK_FREQ_26_MHZ;
1142                 break;
1143         case 38400000:
1144                 ctrl = HFCLK_FREQ_38p4_MHZ;
1145                 break;
1146         }
1147
1148         ctrl |= HIGH_PERF_SQ;
1149         if (clock && clock->ck32k_lowpwr_enable)
1150                 ctrl |= CK32K_LOWPWR_EN;
1151
1152         e |= unprotect_pm_master();
1153         /* effect->MADC+USB ck en */
1154         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1155         e |= protect_pm_master();
1156
1157         if (e < 0)
1158                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1159 }
1160
1161 /*----------------------------------------------------------------------*/
1162
1163 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1164 int twl4030_exit_irq(void);
1165 int twl4030_init_chip_irq(const char *chip);
1166 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1167 int twl6030_exit_irq(void);
1168
1169 static int twl_remove(struct i2c_client *client)
1170 {
1171         unsigned i;
1172         int status;
1173
1174         if (twl_class_is_4030())
1175                 status = twl4030_exit_irq();
1176         else
1177                 status = twl6030_exit_irq();
1178
1179         if (status < 0)
1180                 return status;
1181
1182         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1183                 struct twl_client       *twl = &twl_modules[i];
1184
1185                 if (twl->client && twl->client != client)
1186                         i2c_unregister_device(twl->client);
1187                 twl_modules[i].client = NULL;
1188         }
1189         inuse = false;
1190         return 0;
1191 }
1192
1193 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
1194 static int __devinit
1195 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1196 {
1197         int                             status;
1198         unsigned                        i;
1199         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1200         u8 temp;
1201         int ret = 0;
1202
1203         if (!pdata) {
1204                 dev_dbg(&client->dev, "no platform data?\n");
1205                 return -EINVAL;
1206         }
1207
1208         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1209                 dev_dbg(&client->dev, "can't talk I2C?\n");
1210                 return -EIO;
1211         }
1212
1213         if (inuse) {
1214                 dev_dbg(&client->dev, "driver is already in use\n");
1215                 return -EBUSY;
1216         }
1217
1218         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1219                 struct twl_client       *twl = &twl_modules[i];
1220
1221                 twl->address = client->addr + i;
1222                 if (i == 0)
1223                         twl->client = client;
1224                 else {
1225                         twl->client = i2c_new_dummy(client->adapter,
1226                                         twl->address);
1227                         if (!twl->client) {
1228                                 dev_err(&client->dev,
1229                                         "can't attach client %d\n", i);
1230                                 status = -ENOMEM;
1231                                 goto fail;
1232                         }
1233                 }
1234                 mutex_init(&twl->xfer_lock);
1235         }
1236         inuse = true;
1237         if ((id->driver_data) & TWL6030_CLASS) {
1238                 twl_id = TWL6030_CLASS_ID;
1239                 twl_map = &twl6030_map[0];
1240         } else {
1241                 twl_id = TWL4030_CLASS_ID;
1242                 twl_map = &twl4030_map[0];
1243         }
1244
1245         /* setup clock framework */
1246         clocks_init(&client->dev, pdata->clock);
1247
1248         /* read TWL IDCODE Register */
1249         if (twl_id == TWL4030_CLASS_ID) {
1250                 ret = twl_read_idcode_register();
1251                 WARN(ret < 0, "Error: reading twl_idcode register value\n");
1252         }
1253
1254         /* load power event scripts */
1255         if (twl_has_power() && pdata->power)
1256                 twl4030_power_init(pdata->power);
1257
1258         /* Maybe init the T2 Interrupt subsystem */
1259         if (client->irq
1260                         && pdata->irq_base
1261                         && pdata->irq_end > pdata->irq_base) {
1262                 if (twl_class_is_4030()) {
1263                         twl4030_init_chip_irq(id->name);
1264                         status = twl4030_init_irq(client->irq, pdata->irq_base,
1265                         pdata->irq_end);
1266                 } else {
1267                         status = twl6030_init_irq(client->irq, pdata->irq_base,
1268                         pdata->irq_end);
1269                 }
1270
1271                 if (status < 0)
1272                         goto fail;
1273         }
1274
1275         /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1276          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1277          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1278          */
1279
1280         if (twl_class_is_4030()) {
1281                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1282                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1283                 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1284                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1285         }
1286
1287         status = add_children(pdata, id->driver_data);
1288 fail:
1289         if (status < 0)
1290                 twl_remove(client);
1291         return status;
1292 }
1293
1294 static const struct i2c_device_id twl_ids[] = {
1295         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1296         { "twl5030", 0 },               /* T2 updated */
1297         { "twl5031", TWL5031 },         /* TWL5030 updated */
1298         { "tps65950", 0 },              /* catalog version of twl5030 */
1299         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1300         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1301         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1302                                            and vibrator. Charger in USB module*/
1303         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1304         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1305         { /* end of list */ },
1306 };
1307 MODULE_DEVICE_TABLE(i2c, twl_ids);
1308
1309 /* One Client Driver , 4 Clients */
1310 static struct i2c_driver twl_driver = {
1311         .driver.name    = DRIVER_NAME,
1312         .id_table       = twl_ids,
1313         .probe          = twl_probe,
1314         .remove         = twl_remove,
1315 };
1316
1317 static int __init twl_init(void)
1318 {
1319         return i2c_add_driver(&twl_driver);
1320 }
1321 subsys_initcall(twl_init);
1322
1323 static void __exit twl_exit(void)
1324 {
1325         i2c_del_driver(&twl_driver);
1326 }
1327 module_exit(twl_exit);
1328
1329 MODULE_AUTHOR("Texas Instruments, Inc.");
1330 MODULE_DESCRIPTION("I2C Core interface for TWL");
1331 MODULE_LICENSE("GPL");