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 <[email protected]>
  12  *
  13  * Code cleanup and modifications to IRQ handler.
  14  * by syed khasim <[email protected]>
  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 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  67 #define twl_has_keypad()        true
  68 #else
  69 #define twl_has_keypad()        false
  70 #endif
  71
  72 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  73 #define twl_has_gpio()  true
  74 #else
  75 #define twl_has_gpio()  false
  76 #endif
  77
  78 #if defined(CONFIG_REGULATOR_TWL4030) \
  79         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  80 #define twl_has_regulator()     true
  81 #else
  82 #define twl_has_regulator()     false
  83 #endif
  84
  85 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  86 #define twl_has_madc()  true
  87 #else
  88 #define twl_has_madc()  false
  89 #endif
  90
  91 #ifdef CONFIG_TWL4030_POWER
  92 #define twl_has_power()        true
  93 #else
  94 #define twl_has_power()        false
  95 #endif
  96
  97 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  98 #define twl_has_rtc()   true
  99 #else
 100 #define twl_has_rtc()   false
 101 #endif
 102
 103 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 104         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 105 #define twl_has_usb()   true
 106 #else
 107 #define twl_has_usb()   false
 108 #endif
 109
 110 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 111         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 112 #define twl_has_watchdog()        true
 113 #else
 114 #define twl_has_watchdog()        false
 115 #endif
 116
 117 #if defined(CONFIG_MFD_TWL4030_AUDIO) || \
 118         defined(CONFIG_MFD_TWL4030_AUDIO_MODULE)
 119 #define twl_has_codec() true
 120 #else
 121 #define twl_has_codec() false
 122 #endif
 123
 124 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 125 #define twl_has_bci()   true
 126 #else
 127 #define twl_has_bci()   false
 128 #endif
 129
 130 /* Triton Core internal information (BEGIN) */
 131
 132 /* Last - for index max*/
 133 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 134
 135 #define TWL_NUM_SLAVES          4
 136
 137 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 138         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 139 #define twl_has_pwrbutton()     true
 140 #else
 141 #define twl_has_pwrbutton()     false
 142 #endif
 143
 144 #define SUB_CHIP_ID0 0
 145 #define SUB_CHIP_ID1 1
 146 #define SUB_CHIP_ID2 2
 147 #define SUB_CHIP_ID3 3
 148 #define SUB_CHIP_ID_INVAL 0xff
 149
 150 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 151
 152 /* Base Address defns for twl4030_map[] */
 153
 154 /* subchip/slave 0 - USB ID */
 155 #define TWL4030_BASEADD_USB             0x0000
 156
 157 /* subchip/slave 1 - AUD ID */
 158 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 159 #define TWL4030_BASEADD_GPIO            0x0098
 160 #define TWL4030_BASEADD_INTBR           0x0085
 161 #define TWL4030_BASEADD_PIH             0x0080
 162 #define TWL4030_BASEADD_TEST            0x004C
 163
 164 /* subchip/slave 2 - AUX ID */
 165 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 166 #define TWL4030_BASEADD_LED             0x00EE
 167 #define TWL4030_BASEADD_MADC            0x0000
 168 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 169 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 170 #define TWL4030_BASEADD_PWM0            0x00F8
 171 #define TWL4030_BASEADD_PWM1            0x00FB
 172 #define TWL4030_BASEADD_PWMA            0x00EF
 173 #define TWL4030_BASEADD_PWMB            0x00F1
 174 #define TWL4030_BASEADD_KEYPAD          0x00D2
 175
 176 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 177 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 178                                                   one */
 179
 180 /* subchip/slave 3 - POWER ID */
 181 #define TWL4030_BASEADD_BACKUP          0x0014
 182 #define TWL4030_BASEADD_INT             0x002E
 183 #define TWL4030_BASEADD_PM_MASTER       0x0036
 184 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 185 #define TWL4030_BASEADD_RTC             0x001C
 186 #define TWL4030_BASEADD_SECURED_REG     0x0000
 187
 188 /* Triton Core internal information (END) */
 189
 190
 191 /* subchip/slave 0 0x48 - POWER */
 192 #define TWL6030_BASEADD_RTC             0x0000
 193 #define TWL6030_BASEADD_MEM             0x0017
 194 #define TWL6030_BASEADD_PM_MASTER       0x001F
 195 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 196 #define TWL6030_BASEADD_PM_MISC         0x00E2
 197 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 198
 199 /* subchip/slave 1 0x49 - FEATURE */
 200 #define TWL6030_BASEADD_USB             0x0000
 201 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 202 #define TWL6030_BASEADD_AUX             0x0090
 203 #define TWL6030_BASEADD_PWM             0x00BA
 204 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 205 #define TWL6030_BASEADD_PIH             0x00D0
 206 #define TWL6030_BASEADD_CHARGER         0x00E0
 207 #define TWL6025_BASEADD_CHARGER         0x00DA
 208
 209 /* subchip/slave 2 0x4A - DFT */
 210 #define TWL6030_BASEADD_DIEID           0x00C0
 211
 212 /* subchip/slave 3 0x4B - AUDIO */
 213 #define TWL6030_BASEADD_AUDIO           0x0000
 214 #define TWL6030_BASEADD_RSV             0x0000
 215 #define TWL6030_BASEADD_ZERO            0x0000
 216
 217 /* Few power values */
 218 #define R_CFG_BOOT                      0x05
 219
 220 /* some fields in R_CFG_BOOT */
 221 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 222 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 223 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 224 #define HIGH_PERF_SQ                    (1 << 3)
 225 #define CK32K_LOWPWR_EN                 (1 << 7)
 226
 227 /*----------------------------------------------------------------------*/
 228
 229 /* is driver active, bound to a chip? */
 230 static bool inuse;
 231
 232 /* TWL IDCODE Register value */
 233 static u32 twl_idcode;
 234
 235 static unsigned int twl_id;
 236 unsigned int twl_rev(void)
 237 {
 238         return twl_id;
 239 }
 240 EXPORT_SYMBOL(twl_rev);
 241
 242 /* Structure for each TWL4030/TWL6030 Slave */
 243 struct twl_client {
 244         struct i2c_client *client;
 245         u8 address;
 246
 247         /* max numb of i2c_msg required is for read =2 */
 248         struct i2c_msg xfer_msg[2];
 249
 250         /* To lock access to xfer_msg */
 251         struct mutex xfer_lock;
 252 };
 253
 254 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 255
 256 /* mapping the module id to slave id and base address */
 257 struct twl_mapping {
 258         unsigned char sid;      /* Slave ID */
 259         unsigned char base;     /* base address */
 260 };
 261 static struct twl_mapping *twl_map;
 262
 263 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 264         /*
 265          * NOTE:  don't change this table without updating the
 266          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 267          * so they continue to match the order in this table.
 268          */
 269
 270         { 0, TWL4030_BASEADD_USB },
 271
 272         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 273         { 1, TWL4030_BASEADD_GPIO },
 274         { 1, TWL4030_BASEADD_INTBR },
 275         { 1, TWL4030_BASEADD_PIH },
 276         { 1, TWL4030_BASEADD_TEST },
 277
 278         { 2, TWL4030_BASEADD_KEYPAD },
 279         { 2, TWL4030_BASEADD_MADC },
 280         { 2, TWL4030_BASEADD_INTERRUPTS },
 281         { 2, TWL4030_BASEADD_LED },
 282         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 283         { 2, TWL4030_BASEADD_PRECHARGE },
 284         { 2, TWL4030_BASEADD_PWM0 },
 285         { 2, TWL4030_BASEADD_PWM1 },
 286         { 2, TWL4030_BASEADD_PWMA },
 287         { 2, TWL4030_BASEADD_PWMB },
 288         { 2, TWL5031_BASEADD_ACCESSORY },
 289         { 2, TWL5031_BASEADD_INTERRUPTS },
 290
 291         { 3, TWL4030_BASEADD_BACKUP },
 292         { 3, TWL4030_BASEADD_INT },
 293         { 3, TWL4030_BASEADD_PM_MASTER },
 294         { 3, TWL4030_BASEADD_PM_RECEIVER },
 295         { 3, TWL4030_BASEADD_RTC },
 296         { 3, TWL4030_BASEADD_SECURED_REG },
 297 };
 298
 299 static struct twl_mapping twl6030_map[] = {
 300         /*
 301          * NOTE:  don't change this table without updating the
 302          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 303          * so they continue to match the order in this table.
 304          */
 305         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 306         { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO },
 307         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 308         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 309         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 310
 311         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 312         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 313         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 314         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 315         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 316
 317         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 318         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 319         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 320         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 321         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 322
 323         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 324         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 325         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 327         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 328         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 329         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 330
 331         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 332         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 333         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 334 };
 335
 336 /*----------------------------------------------------------------------*/
 337
 338 /* Exported Functions */
 339
 340 /**
 341  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 342  * @mod_no: module number
 343  * @value: an array of num_bytes+1 containing data to write
 344  * @reg: register address (just offset will do)
 345  * @num_bytes: number of bytes to transfer
 346  *
 347  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 348  * valid data starts at Offset 1.
 349  *
 350  * Returns the result of operation - 0 is success
 351  */
 352 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 353 {
 354         int ret;
 355         int sid;
 356         struct twl_client *twl;
 357         struct i2c_msg *msg;
 358
 359         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 360                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 361                 return -EPERM;
 362         }
 363         if (unlikely(!inuse)) {
 364                 pr_err("%s: not initialized\n", DRIVER_NAME);
 365                 return -EPERM;
 366         }
 367         sid = twl_map[mod_no].sid;
 368         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 369                 pr_err("%s: module %d is not part of the pmic\n",
 370                        DRIVER_NAME, mod_no);
 371                 return -EINVAL;
 372         }
 373         twl = &twl_modules[sid];
 374
 375         mutex_lock(&twl->xfer_lock);
 376         /*
 377          * [MSG1]: fill the register address data
 378          * fill the data Tx buffer
 379          */
 380         msg = &twl->xfer_msg[0];
 381         msg->addr = twl->address;
 382         msg->len = num_bytes + 1;
 383         msg->flags = 0;
 384         msg->buf = value;
 385         /* over write the first byte of buffer with the register address */
 386         *value = twl_map[mod_no].base + reg;
 387         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 388         mutex_unlock(&twl->xfer_lock);
 389
 390         /* i2c_transfer returns number of messages transferred */
 391         if (ret != 1) {
 392                 pr_err("%s: i2c_write failed to transfer all messages\n",
 393                         DRIVER_NAME);
 394                 if (ret < 0)
 395                         return ret;
 396                 else
 397                         return -EIO;
 398         } else {
 399                 return 0;
 400         }
 401 }
 402 EXPORT_SYMBOL(twl_i2c_write);
 403
 404 /**
 405  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 406  * @mod_no: module number
 407  * @value: an array of num_bytes containing data to be read
 408  * @reg: register address (just offset will do)
 409  * @num_bytes: number of bytes to transfer
 410  *
 411  * Returns result of operation - num_bytes is success else failure.
 412  */
 413 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 414 {
 415         int ret;
 416         u8 val;
 417         int sid;
 418         struct twl_client *twl;
 419         struct i2c_msg *msg;
 420
 421         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 422                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 423                 return -EPERM;
 424         }
 425         if (unlikely(!inuse)) {
 426                 pr_err("%s: not initialized\n", DRIVER_NAME);
 427                 return -EPERM;
 428         }
 429         sid = twl_map[mod_no].sid;
 430         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 431                 pr_err("%s: module %d is not part of the pmic\n",
 432                        DRIVER_NAME, mod_no);
 433                 return -EINVAL;
 434         }
 435         twl = &twl_modules[sid];
 436
 437         mutex_lock(&twl->xfer_lock);
 438         /* [MSG1] fill the register address data */
 439         msg = &twl->xfer_msg[0];
 440         msg->addr = twl->address;
 441         msg->len = 1;
 442         msg->flags = 0; /* Read the register value */
 443         val = twl_map[mod_no].base + reg;
 444         msg->buf = &val;
 445         /* [MSG2] fill the data rx buffer */
 446         msg = &twl->xfer_msg[1];
 447         msg->addr = twl->address;
 448         msg->flags = I2C_M_RD;  /* Read the register value */
 449         msg->len = num_bytes;   /* only n bytes */
 450         msg->buf = value;
 451         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 452         mutex_unlock(&twl->xfer_lock);
 453
 454         /* i2c_transfer returns number of messages transferred */
 455         if (ret != 2) {
 456                 pr_err("%s: i2c_read failed to transfer all messages\n",
 457                         DRIVER_NAME);
 458                 if (ret < 0)
 459                         return ret;
 460                 else
 461                         return -EIO;
 462         } else {
 463                 return 0;
 464         }
 465 }
 466 EXPORT_SYMBOL(twl_i2c_read);
 467
 468 /**
 469  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 470  * @mod_no: module number
 471  * @value: the value to be written 8 bit
 472  * @reg: register address (just offset will do)
 473  *
 474  * Returns result of operation - 0 is success
 475  */
 476 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 477 {
 478
 479         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 480         u8 temp_buffer[2] = { 0 };
 481         /* offset 1 contains the data */
 482         temp_buffer[1] = value;
 483         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 484 }
 485 EXPORT_SYMBOL(twl_i2c_write_u8);
 486
 487 /**
 488  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 489  * @mod_no: module number
 490  * @value: the value read 8 bit
 491  * @reg: register address (just offset will do)
 492  *
 493  * Returns result of operation - 0 is success
 494  */
 495 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 496 {
 497         return twl_i2c_read(mod_no, value, reg, 1);
 498 }
 499 EXPORT_SYMBOL(twl_i2c_read_u8);
 500
 501 /*----------------------------------------------------------------------*/
 502
 503 /**
 504  * twl_read_idcode_register - API to read the IDCODE register.
 505  *
 506  * Unlocks the IDCODE register and read the 32 bit value.
 507  */
 508 static int twl_read_idcode_register(void)
 509 {
 510         int err;
 511
 512         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 513                                                 REG_UNLOCK_TEST_REG);
 514         if (err) {
 515                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 516                 goto fail;
 517         }
 518
 519         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 520                                                 REG_IDCODE_7_0, 4);
 521         if (err) {
 522                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 523                 goto fail;
 524         }
 525
 526         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 527         if (err)
 528                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 529 fail:
 530         return err;
 531 }
 532
 533 /**
 534  * twl_get_type - API to get TWL Si type.
 535  *
 536  * Api to get the TWL Si type from IDCODE value.
 537  */
 538 int twl_get_type(void)
 539 {
 540         return TWL_SIL_TYPE(twl_idcode);
 541 }
 542 EXPORT_SYMBOL_GPL(twl_get_type);
 543
 544 /**
 545  * twl_get_version - API to get TWL Si version.
 546  *
 547  * Api to get the TWL Si version from IDCODE value.
 548  */
 549 int twl_get_version(void)
 550 {
 551         return TWL_SIL_REV(twl_idcode);
 552 }
 553 EXPORT_SYMBOL_GPL(twl_get_version);
 554
 555 static struct device *
 556 add_numbered_child(unsigned chip, const char *name, int num,
 557                 void *pdata, unsigned pdata_len,
 558                 bool can_wakeup, int irq0, int irq1)
 559 {
 560         struct platform_device  *pdev;
 561         struct twl_client       *twl = &twl_modules[chip];
 562         int                     status;
 563
 564         pdev = platform_device_alloc(name, num);
 565         if (!pdev) {
 566                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 567                 status = -ENOMEM;
 568                 goto err;
 569         }
 570
 571         pdev->dev.parent = &twl->client->dev;
 572
 573         if (pdata) {
 574                 status = platform_device_add_data(pdev, pdata, pdata_len);
 575                 if (status < 0) {
 576                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 577                         goto err;
 578                 }
 579         }
 580
 581         if (irq0) {
 582                 struct resource r[2] = {
 583                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 584                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 585                 };
 586
 587                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 588                 if (status < 0) {
 589                         dev_dbg(&pdev->dev, "can't add irqs\n");
 590                         goto err;
 591                 }
 592         }
 593
 594         status = platform_device_add(pdev);
 595         if (status == 0)
 596                 device_init_wakeup(&pdev->dev, can_wakeup);
 597
 598 err:
 599         if (status < 0) {
 600                 platform_device_put(pdev);
 601                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 602                 return ERR_PTR(status);
 603         }
 604         return &pdev->dev;
 605 }
 606
 607 static inline struct device *add_child(unsigned chip, const char *name,
 608                 void *pdata, unsigned pdata_len,
 609                 bool can_wakeup, int irq0, int irq1)
 610 {
 611         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 612                 can_wakeup, irq0, irq1);
 613 }
 614
 615 static struct device *
 616 add_regulator_linked(int num, struct regulator_init_data *pdata,
 617                 struct regulator_consumer_supply *consumers,
 618                 unsigned num_consumers, unsigned long features)
 619 {
 620         unsigned sub_chip_id;
 621         struct twl_regulator_driver_data drv_data;
 622
 623         /* regulator framework demands init_data ... */
 624         if (!pdata)
 625                 return NULL;
 626
 627         if (consumers) {
 628                 pdata->consumer_supplies = consumers;
 629                 pdata->num_consumer_supplies = num_consumers;
 630         }
 631
 632         if (pdata->driver_data) {
 633                 /* If we have existing drv_data, just add the flags */
 634                 struct twl_regulator_driver_data *tmp;
 635                 tmp = pdata->driver_data;
 636                 tmp->features |= features;
 637         } else {
 638                 /* add new driver data struct, used only during init */
 639                 drv_data.features = features;
 640                 drv_data.set_voltage = NULL;
 641                 drv_data.get_voltage = NULL;
 642                 drv_data.data = NULL;
 643                 pdata->driver_data = &drv_data;
 644         }
 645
 646         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 647         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 648         return add_numbered_child(sub_chip_id, "twl_reg", num,
 649                 pdata, sizeof(*pdata), false, 0, 0);
 650 }
 651
 652 static struct device *
 653 add_regulator(int num, struct regulator_init_data *pdata,
 654                 unsigned long features)
 655 {
 656         return add_regulator_linked(num, pdata, NULL, 0, features);
 657 }
 658
 659 /*
 660  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 661  * for the PIH, and the next are for the PWR_INT SIH, since
 662  * that's how twl_init_irq() sets things up.
 663  */
 664
 665 static int
 666 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 667                 unsigned long features)
 668 {
 669         struct device   *child;
 670         unsigned sub_chip_id;
 671
 672         if (twl_has_gpio() && pdata->gpio) {
 673                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 674                                 pdata->gpio, sizeof(*pdata->gpio),
 675                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 676                 if (IS_ERR(child))
 677                         return PTR_ERR(child);
 678         }
 679
 680         if (twl_has_keypad() && pdata->keypad) {
 681                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 682                                 pdata->keypad, sizeof(*pdata->keypad),
 683                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 684                 if (IS_ERR(child))
 685                         return PTR_ERR(child);
 686         }
 687
 688         if (twl_has_madc() && pdata->madc) {
 689                 child = add_child(2, "twl4030_madc",
 690                                 pdata->madc, sizeof(*pdata->madc),
 691                                 true, irq_base + MADC_INTR_OFFSET, 0);
 692                 if (IS_ERR(child))
 693                         return PTR_ERR(child);
 694         }
 695
 696         if (twl_has_rtc()) {
 697                 /*
 698                  * REVISIT platform_data here currently might expose the
 699                  * "msecure" line ... but for now we just expect board
 700                  * setup to tell the chip "it's always ok to SET_TIME".
 701                  * Eventually, Linux might become more aware of such
 702                  * HW security concerns, and "least privilege".
 703                  */
 704                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 705                 child = add_child(sub_chip_id, "twl_rtc",
 706                                 NULL, 0,
 707                                 true, irq_base + RTC_INTR_OFFSET, 0);
 708                 if (IS_ERR(child))
 709                         return PTR_ERR(child);
 710         }
 711
 712         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 713
 714                 static struct regulator_consumer_supply usb1v5 = {
 715                         .supply =       "usb1v5",
 716                 };
 717                 static struct regulator_consumer_supply usb1v8 = {
 718                         .supply =       "usb1v8",
 719                 };
 720                 static struct regulator_consumer_supply usb3v1[] = {
 721                         { .supply =     "usb3v1" },
 722                         { .supply =     "bci3v1" },
 723                 };
 724
 725         /* First add the regulators so that they can be used by transceiver */
 726                 if (twl_has_regulator()) {
 727                         /* this is a template that gets copied */
 728                         struct regulator_init_data usb_fixed = {
 729                                 .constraints.valid_modes_mask =
 730                                         REGULATOR_MODE_NORMAL
 731                                         | REGULATOR_MODE_STANDBY,
 732                                 .constraints.valid_ops_mask =
 733                                         REGULATOR_CHANGE_MODE
 734                                         | REGULATOR_CHANGE_STATUS,
 735                         };
 736
 737                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 738                                                       &usb_fixed, &usb1v5, 1,
 739                                                       features);
 740                         if (IS_ERR(child))
 741                                 return PTR_ERR(child);
 742
 743                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 744                                                       &usb_fixed, &usb1v8, 1,
 745                                                       features);
 746                         if (IS_ERR(child))
 747                                 return PTR_ERR(child);
 748
 749                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 750                                                       &usb_fixed, usb3v1, 2,
 751                                                       features);
 752                         if (IS_ERR(child))
 753                                 return PTR_ERR(child);
 754
 755                 }
 756
 757                 child = add_child(0, "twl4030_usb",
 758                                 pdata->usb, sizeof(*pdata->usb),
 759                                 true,
 760                                 /* irq0 = USB_PRES, irq1 = USB */
 761                                 irq_base + USB_PRES_INTR_OFFSET,
 762                                 irq_base + USB_INTR_OFFSET);
 763
 764                 if (IS_ERR(child))
 765                         return PTR_ERR(child);
 766
 767                 /* we need to connect regulators to this transceiver */
 768                 if (twl_has_regulator() && child) {
 769                         usb1v5.dev_name = dev_name(child);
 770                         usb1v8.dev_name = dev_name(child);
 771                         usb3v1[0].dev_name = dev_name(child);
 772                 }
 773         }
 774         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 775
 776                 static struct regulator_consumer_supply usb3v3;
 777                 int regulator;
 778
 779                 if (twl_has_regulator()) {
 780                         /* this is a template that gets copied */
 781                         struct regulator_init_data usb_fixed = {
 782                                 .constraints.valid_modes_mask =
 783                                         REGULATOR_MODE_NORMAL
 784                                         | REGULATOR_MODE_STANDBY,
 785                                 .constraints.valid_ops_mask =
 786                                         REGULATOR_CHANGE_MODE
 787                                         | REGULATOR_CHANGE_STATUS,
 788                         };
 789
 790                         if (features & TWL6025_SUBCLASS) {
 791                                 usb3v3.supply = "ldousb";
 792                                 regulator = TWL6025_REG_LDOUSB;
 793                         } else {
 794                                 usb3v3.supply = "vusb";
 795                                 regulator = TWL6030_REG_VUSB;
 796                         }
 797                         child = add_regulator_linked(regulator, &usb_fixed,
 798                                                         &usb3v3, 1,
 799                                                         features);
 800                         if (IS_ERR(child))
 801                                 return PTR_ERR(child);
 802                 }
 803
 804                 pdata->usb->features = features;
 805
 806                 child = add_child(0, "twl6030_usb",
 807                         pdata->usb, sizeof(*pdata->usb),
 808                         true,
 809                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 810                         irq_base + USBOTG_INTR_OFFSET,
 811                         irq_base + USB_PRES_INTR_OFFSET);
 812
 813                 if (IS_ERR(child))
 814                         return PTR_ERR(child);
 815                 /* we need to connect regulators to this transceiver */
 816                 if (twl_has_regulator() && child)
 817                         usb3v3.dev_name = dev_name(child);
 818         } else if (twl_has_regulator() && twl_class_is_6030()) {
 819                 if (features & TWL6025_SUBCLASS)
 820                         child = add_regulator(TWL6025_REG_LDOUSB,
 821                                                 pdata->ldousb, features);
 822                 else
 823                         child = add_regulator(TWL6030_REG_VUSB,
 824                                                 pdata->vusb, features);
 825
 826                         if (IS_ERR(child))
 827                                         return PTR_ERR(child);
 828         }
 829
 830         if (twl_has_watchdog() && twl_class_is_4030()) {
 831                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 832                 if (IS_ERR(child))
 833                         return PTR_ERR(child);
 834         }
 835
 836         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 837                 child = add_child(1, "twl4030_pwrbutton",
 838                                 NULL, 0, true, irq_base + 8 + 0, 0);
 839                 if (IS_ERR(child))
 840                         return PTR_ERR(child);
 841         }
 842
 843         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 844                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 845                 child = add_child(sub_chip_id, "twl4030-audio",
 846                                 pdata->audio, sizeof(*pdata->audio),
 847                                 false, 0, 0);
 848                 if (IS_ERR(child))
 849                         return PTR_ERR(child);
 850         }
 851
 852         /* twl4030 regulators */
 853         if (twl_has_regulator() && twl_class_is_4030()) {
 854                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 855                                         features);
 856                 if (IS_ERR(child))
 857                         return PTR_ERR(child);
 858
 859                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 860                                         features);
 861                 if (IS_ERR(child))
 862                         return PTR_ERR(child);
 863
 864                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 865                                         features);
 866                 if (IS_ERR(child))
 867                         return PTR_ERR(child);
 868
 869                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 870                                         features);
 871                 if (IS_ERR(child))
 872                         return PTR_ERR(child);
 873
 874                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 875                                         features);
 876                 if (IS_ERR(child))
 877                         return PTR_ERR(child);
 878
 879                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 880                                         features);
 881                 if (IS_ERR(child))
 882                         return PTR_ERR(child);
 883
 884                 child = add_regulator((features & TWL4030_VAUX2)
 885                                         ? TWL4030_REG_VAUX2_4030
 886                                         : TWL4030_REG_VAUX2,
 887                                 pdata->vaux2, features);
 888                 if (IS_ERR(child))
 889                         return PTR_ERR(child);
 890
 891                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 892                                         features);
 893                 if (IS_ERR(child))
 894                         return PTR_ERR(child);
 895
 896                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 897                                         features);
 898                 if (IS_ERR(child))
 899                         return PTR_ERR(child);
 900
 901                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 902                                         features);
 903                 if (IS_ERR(child))
 904                         return PTR_ERR(child);
 905         }
 906
 907         /* maybe add LDOs that are omitted on cost-reduced parts */
 908         if (twl_has_regulator() && !(features & TPS_SUBSET)
 909           && twl_class_is_4030()) {
 910                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 911                                         features);
 912                 if (IS_ERR(child))
 913                         return PTR_ERR(child);
 914
 915                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 916                                         features);
 917                 if (IS_ERR(child))
 918                         return PTR_ERR(child);
 919
 920                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 921                                         features);
 922                 if (IS_ERR(child))
 923                         return PTR_ERR(child);
 924
 925                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 926                                         features);
 927                 if (IS_ERR(child))
 928                         return PTR_ERR(child);
 929
 930                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 931                                         features);
 932                 if (IS_ERR(child))
 933                         return PTR_ERR(child);
 934
 935                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 936                                         features);
 937                 if (IS_ERR(child))
 938                         return PTR_ERR(child);
 939         }
 940
 941         /* twl6030 regulators */
 942         if (twl_has_regulator() && twl_class_is_6030() &&
 943                         !(features & TWL6025_SUBCLASS)) {
 944                 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
 945                                         features);
 946                 if (IS_ERR(child))
 947                         return PTR_ERR(child);
 948
 949                 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
 950                                         features);
 951                 if (IS_ERR(child))
 952                         return PTR_ERR(child);
 953
 954                 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
 955                                         features);
 956                 if (IS_ERR(child))
 957                         return PTR_ERR(child);
 958
 959                 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8,
 960                                         features);
 961                 if (IS_ERR(child))
 962                         return PTR_ERR(child);
 963
 964                 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1,
 965                                         features);
 966                 if (IS_ERR(child))
 967                         return PTR_ERR(child);
 968
 969                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 970                                         features);
 971                 if (IS_ERR(child))
 972                         return PTR_ERR(child);
 973
 974                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 975                                         features);
 976                 if (IS_ERR(child))
 977                         return PTR_ERR(child);
 978
 979                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 980                                         features);
 981                 if (IS_ERR(child))
 982                         return PTR_ERR(child);
 983
 984                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 985                                         features);
 986                 if (IS_ERR(child))
 987                         return PTR_ERR(child);
 988
 989                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 990                                         features);
 991                 if (IS_ERR(child))
 992                         return PTR_ERR(child);
 993
 994                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 995                                         features);
 996                 if (IS_ERR(child))
 997                         return PTR_ERR(child);
 998
 999                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
1000                                         features);
1001                 if (IS_ERR(child))
1002                         return PTR_ERR(child);
1003
1004                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
1005                                         features);
1006                 if (IS_ERR(child))
1007                         return PTR_ERR(child);
1008
1009                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
1010                                         features);
1011                 if (IS_ERR(child))
1012                         return PTR_ERR(child);
1013         }
1014
1015         /* 6030 and 6025 share this regulator */
1016         if (twl_has_regulator() && twl_class_is_6030()) {
1017                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
1018                                         features);
1019                 if (IS_ERR(child))
1020                         return PTR_ERR(child);
1021         }
1022
1023         /* twl6025 regulators */
1024         if (twl_has_regulator() && twl_class_is_6030() &&
1025                         (features & TWL6025_SUBCLASS)) {
1026                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1027                                         features);
1028                 if (IS_ERR(child))
1029                         return PTR_ERR(child);
1030
1031                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1032                                         features);
1033                 if (IS_ERR(child))
1034                         return PTR_ERR(child);
1035
1036                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1037                                         features);
1038                 if (IS_ERR(child))
1039                         return PTR_ERR(child);
1040
1041                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1042                                         features);
1043                 if (IS_ERR(child))
1044                         return PTR_ERR(child);
1045
1046                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1047                                         features);
1048                 if (IS_ERR(child))
1049                         return PTR_ERR(child);
1050
1051                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1052                                         features);
1053                 if (IS_ERR(child))
1054                         return PTR_ERR(child);
1055
1056                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1057                                         features);
1058                 if (IS_ERR(child))
1059                         return PTR_ERR(child);
1060
1061                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1062                                         features);
1063                 if (IS_ERR(child))
1064                         return PTR_ERR(child);
1065
1066                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1067                                         features);
1068                 if (IS_ERR(child))
1069                         return PTR_ERR(child);
1070
1071                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1072                                         features);
1073                 if (IS_ERR(child))
1074                         return PTR_ERR(child);
1075
1076                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1077                                         features);
1078                 if (IS_ERR(child))
1079                         return PTR_ERR(child);
1080
1081         }
1082
1083         if (twl_has_bci() && pdata->bci &&
1084                         !(features & (TPS_SUBSET | TWL5031))) {
1085                 child = add_child(3, "twl4030_bci",
1086                                 pdata->bci, sizeof(*pdata->bci), false,
1087                                 /* irq0 = CHG_PRES, irq1 = BCI */
1088                                 irq_base + BCI_PRES_INTR_OFFSET,
1089                                 irq_base + BCI_INTR_OFFSET);
1090                 if (IS_ERR(child))
1091                         return PTR_ERR(child);
1092         }
1093
1094         return 0;
1095 }
1096
1097 /*----------------------------------------------------------------------*/
1098
1099 /*
1100  * These three functions initialize the on-chip clock framework,
1101  * letting it generate the right frequencies for USB, MADC, and
1102  * other purposes.
1103  */
1104 static inline int __init protect_pm_master(void)
1105 {
1106         int e = 0;
1107
1108         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1109                         TWL4030_PM_MASTER_PROTECT_KEY);
1110         return e;
1111 }
1112
1113 static inline int __init unprotect_pm_master(void)
1114 {
1115         int e = 0;
1116
1117         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1118                         TWL4030_PM_MASTER_KEY_CFG1,
1119                         TWL4030_PM_MASTER_PROTECT_KEY);
1120         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1121                         TWL4030_PM_MASTER_KEY_CFG2,
1122                         TWL4030_PM_MASTER_PROTECT_KEY);
1123
1124         return e;
1125 }
1126
1127 static void clocks_init(struct device *dev,
1128                         struct twl4030_clock_init_data *clock)
1129 {
1130         int e = 0;
1131         struct clk *osc;
1132         u32 rate;
1133         u8 ctrl = HFCLK_FREQ_26_MHZ;
1134
1135 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1136         if (cpu_is_omap2430())
1137                 osc = clk_get(dev, "osc_ck");
1138         else
1139                 osc = clk_get(dev, "osc_sys_ck");
1140
1141         if (IS_ERR(osc)) {
1142                 printk(KERN_WARNING "Skipping twl internal clock init and "
1143                                 "using bootloader value (unknown osc rate)\n");
1144                 return;
1145         }
1146
1147         rate = clk_get_rate(osc);
1148         clk_put(osc);
1149
1150 #else
1151         /* REVISIT for non-OMAP systems, pass the clock rate from
1152          * board init code, using platform_data.
1153          */
1154         osc = ERR_PTR(-EIO);
1155
1156         printk(KERN_WARNING "Skipping twl internal clock init and "
1157                "using bootloader value (unknown osc rate)\n");
1158
1159         return;
1160 #endif
1161
1162         switch (rate) {
1163         case 19200000:
1164                 ctrl = HFCLK_FREQ_19p2_MHZ;
1165                 break;
1166         case 26000000:
1167                 ctrl = HFCLK_FREQ_26_MHZ;
1168                 break;
1169         case 38400000:
1170                 ctrl = HFCLK_FREQ_38p4_MHZ;
1171                 break;
1172         }
1173
1174         ctrl |= HIGH_PERF_SQ;
1175         if (clock && clock->ck32k_lowpwr_enable)
1176                 ctrl |= CK32K_LOWPWR_EN;
1177
1178         e |= unprotect_pm_master();
1179         /* effect->MADC+USB ck en */
1180         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1181         e |= protect_pm_master();
1182
1183         if (e < 0)
1184                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1185 }
1186
1187 /*----------------------------------------------------------------------*/
1188
1189
1190 static int twl_remove(struct i2c_client *client)
1191 {
1192         unsigned i, num_slaves;
1193         int status;
1194
1195         if (twl_class_is_4030()) {
1196                 status = twl4030_exit_irq();
1197                 num_slaves = TWL_NUM_SLAVES;
1198         } else {
1199                 status = twl6030_exit_irq();
1200                 num_slaves = TWL_NUM_SLAVES - 1;
1201         }
1202
1203         if (status < 0)
1204                 return status;
1205
1206         for (i = 0; i < num_slaves; i++) {
1207                 struct twl_client       *twl = &twl_modules[i];
1208
1209                 if (twl->client && twl->client != client)
1210                         i2c_unregister_device(twl->client);
1211                 twl_modules[i].client = NULL;
1212         }
1213         inuse = false;
1214         return 0;
1215 }
1216
1217 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1218 static int __devinit
1219 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1220 {
1221         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1222         struct device_node              *node = client->dev.of_node;
1223         int                             irq_base = 0;
1224         int                             status;
1225         unsigned                        i, num_slaves;
1226
1227         if (node && !pdata) {
1228                 /*
1229                  * XXX: Temporary pdata until the information is correctly
1230                  * retrieved by every TWL modules from DT.
1231                  */
1232                 pdata = devm_kzalloc(&client->dev,
1233                                      sizeof(struct twl4030_platform_data),
1234                                      GFP_KERNEL);
1235                 if (!pdata)
1236                         return -ENOMEM;
1237         }
1238
1239         if (!pdata) {
1240                 dev_dbg(&client->dev, "no platform data?\n");
1241                 return -EINVAL;
1242         }
1243
1244         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1245                 dev_dbg(&client->dev, "can't talk I2C?\n");
1246                 return -EIO;
1247         }
1248
1249         if (inuse) {
1250                 dev_dbg(&client->dev, "driver is already in use\n");
1251                 return -EBUSY;
1252         }
1253
1254         if ((id->driver_data) & TWL6030_CLASS) {
1255                 twl_id = TWL6030_CLASS_ID;
1256                 twl_map = &twl6030_map[0];
1257                 num_slaves = TWL_NUM_SLAVES - 1;
1258         } else {
1259                 twl_id = TWL4030_CLASS_ID;
1260                 twl_map = &twl4030_map[0];
1261                 num_slaves = TWL_NUM_SLAVES;
1262         }
1263
1264         for (i = 0; i < num_slaves; i++) {
1265                 struct twl_client *twl = &twl_modules[i];
1266
1267                 twl->address = client->addr + i;
1268                 if (i == 0) {
1269                         twl->client = client;
1270                 } else {
1271                         twl->client = i2c_new_dummy(client->adapter,
1272                                         twl->address);
1273                         if (!twl->client) {
1274                                 dev_err(&client->dev,
1275                                         "can't attach client %d\n", i);
1276                                 status = -ENOMEM;
1277                                 goto fail;
1278                         }
1279                 }
1280                 mutex_init(&twl->xfer_lock);
1281         }
1282
1283         inuse = true;
1284
1285         /* setup clock framework */
1286         clocks_init(&client->dev, pdata->clock);
1287
1288         /* read TWL IDCODE Register */
1289         if (twl_id == TWL4030_CLASS_ID) {
1290                 status = twl_read_idcode_register();
1291                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1292         }
1293
1294         /* load power event scripts */
1295         if (twl_has_power() && pdata->power)
1296                 twl4030_power_init(pdata->power);
1297
1298         /* Maybe init the T2 Interrupt subsystem */
1299         if (client->irq) {
1300                 if (twl_class_is_4030()) {
1301                         twl4030_init_chip_irq(id->name);
1302                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1303                 } else {
1304                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1305                 }
1306
1307                 if (irq_base < 0) {
1308                         status = irq_base;
1309                         goto fail;
1310                 }
1311         }
1312
1313         /*
1314          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1315          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1316          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1317          */
1318         if (twl_class_is_4030()) {
1319                 u8 temp;
1320
1321                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1322                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1323                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1324                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1325         }
1326
1327         status = -ENODEV;
1328         if (node)
1329                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1330         if (status)
1331                 status = add_children(pdata, irq_base, id->driver_data);
1332
1333 fail:
1334         if (status < 0)
1335                 twl_remove(client);
1336
1337         return status;
1338 }
1339
1340 static const struct i2c_device_id twl_ids[] = {
1341         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1342         { "twl5030", 0 },               /* T2 updated */
1343         { "twl5031", TWL5031 },         /* TWL5030 updated */
1344         { "tps65950", 0 },              /* catalog version of twl5030 */
1345         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1346         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1347         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1348                                            and vibrator. Charger in USB module*/
1349         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1350         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1351         { /* end of list */ },
1352 };
1353 MODULE_DEVICE_TABLE(i2c, twl_ids);
1354
1355 /* One Client Driver , 4 Clients */
1356 static struct i2c_driver twl_driver = {
1357         .driver.name    = DRIVER_NAME,
1358         .id_table       = twl_ids,
1359         .probe          = twl_probe,
1360         .remove         = twl_remove,
1361 };
1362
1363 static int __init twl_init(void)
1364 {
1365         return i2c_add_driver(&twl_driver);
1366 }
1367 subsys_initcall(twl_init);
1368
1369 static void __exit twl_exit(void)
1370 {
1371         i2c_del_driver(&twl_driver);
1372 }
1373 module_exit(twl_exit);
1374
1375 MODULE_AUTHOR("Texas Instruments, Inc.");
1376 MODULE_DESCRIPTION("I2C Core interface for TWL");
1377 MODULE_LICENSE("GPL");