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 #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 <plat/cpu.h>
  50
  51 #include "twl-core.h"
  52
  53 /*
  54  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  55  * Management and System Companion Device" chips originally designed for
  56  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  57  * often at around 3 Mbit/sec, including for interrupt handling.
  58  *
  59  * This driver core provides genirq support for the interrupts emitted,
  60  * by the various modules, and exports register access primitives.
  61  *
  62  * FIXME this driver currently requires use of the first interrupt line
  63  * (and associated registers).
  64  */
  65
  66 #define DRIVER_NAME                     "twl"
  67
  68 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  69 #define twl_has_keypad()        true
  70 #else
  71 #define twl_has_keypad()        false
  72 #endif
  73
  74 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  75 #define twl_has_gpio()  true
  76 #else
  77 #define twl_has_gpio()  false
  78 #endif
  79
  80 #if defined(CONFIG_REGULATOR_TWL4030) \
  81         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  82 #define twl_has_regulator()     true
  83 #else
  84 #define twl_has_regulator()     false
  85 #endif
  86
  87 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  88 #define twl_has_madc()  true
  89 #else
  90 #define twl_has_madc()  false
  91 #endif
  92
  93 #ifdef CONFIG_TWL4030_POWER
  94 #define twl_has_power()        true
  95 #else
  96 #define twl_has_power()        false
  97 #endif
  98
  99 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
 100 #define twl_has_rtc()   true
 101 #else
 102 #define twl_has_rtc()   false
 103 #endif
 104
 105 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 106         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 107 #define twl_has_usb()   true
 108 #else
 109 #define twl_has_usb()   false
 110 #endif
 111
 112 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 113         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 114 #define twl_has_watchdog()        true
 115 #else
 116 #define twl_has_watchdog()        false
 117 #endif
 118
 119 #if defined(CONFIG_MFD_TWL4030_AUDIO) || \
 120         defined(CONFIG_MFD_TWL4030_AUDIO_MODULE)
 121 #define twl_has_codec() true
 122 #else
 123 #define twl_has_codec() false
 124 #endif
 125
 126 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 127 #define twl_has_bci()   true
 128 #else
 129 #define twl_has_bci()   false
 130 #endif
 131
 132 /* Triton Core internal information (BEGIN) */
 133
 134 /* Last - for index max*/
 135 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 136
 137 #define TWL_NUM_SLAVES          4
 138
 139 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 140         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 141 #define twl_has_pwrbutton()     true
 142 #else
 143 #define twl_has_pwrbutton()     false
 144 #endif
 145
 146 #define SUB_CHIP_ID0 0
 147 #define SUB_CHIP_ID1 1
 148 #define SUB_CHIP_ID2 2
 149 #define SUB_CHIP_ID3 3
 150 #define SUB_CHIP_ID_INVAL 0xff
 151
 152 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 153
 154 /* Base Address defns for twl4030_map[] */
 155
 156 /* subchip/slave 0 - USB ID */
 157 #define TWL4030_BASEADD_USB             0x0000
 158
 159 /* subchip/slave 1 - AUD ID */
 160 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 161 #define TWL4030_BASEADD_GPIO            0x0098
 162 #define TWL4030_BASEADD_INTBR           0x0085
 163 #define TWL4030_BASEADD_PIH             0x0080
 164 #define TWL4030_BASEADD_TEST            0x004C
 165
 166 /* subchip/slave 2 - AUX ID */
 167 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 168 #define TWL4030_BASEADD_LED             0x00EE
 169 #define TWL4030_BASEADD_MADC            0x0000
 170 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 171 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 172 #define TWL4030_BASEADD_PWM0            0x00F8
 173 #define TWL4030_BASEADD_PWM1            0x00FB
 174 #define TWL4030_BASEADD_PWMA            0x00EF
 175 #define TWL4030_BASEADD_PWMB            0x00F1
 176 #define TWL4030_BASEADD_KEYPAD          0x00D2
 177
 178 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 179 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 180                                                   one */
 181
 182 /* subchip/slave 3 - POWER ID */
 183 #define TWL4030_BASEADD_BACKUP          0x0014
 184 #define TWL4030_BASEADD_INT             0x002E
 185 #define TWL4030_BASEADD_PM_MASTER       0x0036
 186 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 187 #define TWL4030_BASEADD_RTC             0x001C
 188 #define TWL4030_BASEADD_SECURED_REG     0x0000
 189
 190 /* Triton Core internal information (END) */
 191
 192
 193 /* subchip/slave 0 0x48 - POWER */
 194 #define TWL6030_BASEADD_RTC             0x0000
 195 #define TWL6030_BASEADD_MEM             0x0017
 196 #define TWL6030_BASEADD_PM_MASTER       0x001F
 197 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 198 #define TWL6030_BASEADD_PM_MISC         0x00E2
 199 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 200
 201 /* subchip/slave 1 0x49 - FEATURE */
 202 #define TWL6030_BASEADD_USB             0x0000
 203 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 204 #define TWL6030_BASEADD_AUX             0x0090
 205 #define TWL6030_BASEADD_PWM             0x00BA
 206 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 207 #define TWL6030_BASEADD_PIH             0x00D0
 208 #define TWL6030_BASEADD_CHARGER         0x00E0
 209 #define TWL6025_BASEADD_CHARGER         0x00DA
 210
 211 /* subchip/slave 2 0x4A - DFT */
 212 #define TWL6030_BASEADD_DIEID           0x00C0
 213
 214 /* subchip/slave 3 0x4B - AUDIO */
 215 #define TWL6030_BASEADD_AUDIO           0x0000
 216 #define TWL6030_BASEADD_RSV             0x0000
 217 #define TWL6030_BASEADD_ZERO            0x0000
 218
 219 /* Few power values */
 220 #define R_CFG_BOOT                      0x05
 221
 222 /* some fields in R_CFG_BOOT */
 223 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 224 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 225 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 226 #define HIGH_PERF_SQ                    (1 << 3)
 227 #define CK32K_LOWPWR_EN                 (1 << 7)
 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 /* mapping the module id to slave id and base address */
 259 struct twl_mapping {
 260         unsigned char sid;      /* Slave ID */
 261         unsigned char base;     /* base address */
 262 };
 263 static struct twl_mapping *twl_map;
 264
 265 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 266         /*
 267          * NOTE:  don't change this table without updating the
 268          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 269          * so they continue to match the order in this table.
 270          */
 271
 272         { 0, TWL4030_BASEADD_USB },
 273
 274         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 275         { 1, TWL4030_BASEADD_GPIO },
 276         { 1, TWL4030_BASEADD_INTBR },
 277         { 1, TWL4030_BASEADD_PIH },
 278         { 1, TWL4030_BASEADD_TEST },
 279
 280         { 2, TWL4030_BASEADD_KEYPAD },
 281         { 2, TWL4030_BASEADD_MADC },
 282         { 2, TWL4030_BASEADD_INTERRUPTS },
 283         { 2, TWL4030_BASEADD_LED },
 284         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 285         { 2, TWL4030_BASEADD_PRECHARGE },
 286         { 2, TWL4030_BASEADD_PWM0 },
 287         { 2, TWL4030_BASEADD_PWM1 },
 288         { 2, TWL4030_BASEADD_PWMA },
 289         { 2, TWL4030_BASEADD_PWMB },
 290         { 2, TWL5031_BASEADD_ACCESSORY },
 291         { 2, TWL5031_BASEADD_INTERRUPTS },
 292
 293         { 3, TWL4030_BASEADD_BACKUP },
 294         { 3, TWL4030_BASEADD_INT },
 295         { 3, TWL4030_BASEADD_PM_MASTER },
 296         { 3, TWL4030_BASEADD_PM_RECEIVER },
 297         { 3, TWL4030_BASEADD_RTC },
 298         { 3, TWL4030_BASEADD_SECURED_REG },
 299 };
 300
 301 static struct twl_mapping twl6030_map[] = {
 302         /*
 303          * NOTE:  don't change this table without updating the
 304          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 305          * so they continue to match the order in this table.
 306          */
 307         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 308         { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO },
 309         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 310         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 311         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 312
 313         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 314         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 315         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 316         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 317         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 318
 319         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 320         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 321         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 322         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 323         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 324
 325         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 327         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 328         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 329         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 330         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 331         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 332
 333         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 334         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 335         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 336 };
 337
 338 /*----------------------------------------------------------------------*/
 339
 340 /* Exported Functions */
 341
 342 /**
 343  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 344  * @mod_no: module number
 345  * @value: an array of num_bytes+1 containing data to write
 346  * @reg: register address (just offset will do)
 347  * @num_bytes: number of bytes to transfer
 348  *
 349  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 350  * valid data starts at Offset 1.
 351  *
 352  * Returns the result of operation - 0 is success
 353  */
 354 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 355 {
 356         int ret;
 357         int sid;
 358         struct twl_client *twl;
 359         struct i2c_msg *msg;
 360
 361         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 362                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 363                 return -EPERM;
 364         }
 365         if (unlikely(!inuse)) {
 366                 pr_err("%s: not initialized\n", DRIVER_NAME);
 367                 return -EPERM;
 368         }
 369         sid = twl_map[mod_no].sid;
 370         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 371                 pr_err("%s: module %d is not part of the pmic\n",
 372                        DRIVER_NAME, mod_no);
 373                 return -EINVAL;
 374         }
 375         twl = &twl_modules[sid];
 376
 377         mutex_lock(&twl->xfer_lock);
 378         /*
 379          * [MSG1]: fill the register address data
 380          * fill the data Tx buffer
 381          */
 382         msg = &twl->xfer_msg[0];
 383         msg->addr = twl->address;
 384         msg->len = num_bytes + 1;
 385         msg->flags = 0;
 386         msg->buf = value;
 387         /* over write the first byte of buffer with the register address */
 388         *value = twl_map[mod_no].base + reg;
 389         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 390         mutex_unlock(&twl->xfer_lock);
 391
 392         /* i2c_transfer returns number of messages transferred */
 393         if (ret != 1) {
 394                 pr_err("%s: i2c_write failed to transfer all messages\n",
 395                         DRIVER_NAME);
 396                 if (ret < 0)
 397                         return ret;
 398                 else
 399                         return -EIO;
 400         } else {
 401                 return 0;
 402         }
 403 }
 404 EXPORT_SYMBOL(twl_i2c_write);
 405
 406 /**
 407  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 408  * @mod_no: module number
 409  * @value: an array of num_bytes containing data to be read
 410  * @reg: register address (just offset will do)
 411  * @num_bytes: number of bytes to transfer
 412  *
 413  * Returns result of operation - num_bytes is success else failure.
 414  */
 415 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 416 {
 417         int ret;
 418         u8 val;
 419         int sid;
 420         struct twl_client *twl;
 421         struct i2c_msg *msg;
 422
 423         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 424                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 425                 return -EPERM;
 426         }
 427         if (unlikely(!inuse)) {
 428                 pr_err("%s: not initialized\n", DRIVER_NAME);
 429                 return -EPERM;
 430         }
 431         sid = twl_map[mod_no].sid;
 432         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 433                 pr_err("%s: module %d is not part of the pmic\n",
 434                        DRIVER_NAME, mod_no);
 435                 return -EINVAL;
 436         }
 437         twl = &twl_modules[sid];
 438
 439         mutex_lock(&twl->xfer_lock);
 440         /* [MSG1] fill the register address data */
 441         msg = &twl->xfer_msg[0];
 442         msg->addr = twl->address;
 443         msg->len = 1;
 444         msg->flags = 0; /* Read the register value */
 445         val = twl_map[mod_no].base + reg;
 446         msg->buf = &val;
 447         /* [MSG2] fill the data rx buffer */
 448         msg = &twl->xfer_msg[1];
 449         msg->addr = twl->address;
 450         msg->flags = I2C_M_RD;  /* Read the register value */
 451         msg->len = num_bytes;   /* only n bytes */
 452         msg->buf = value;
 453         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 454         mutex_unlock(&twl->xfer_lock);
 455
 456         /* i2c_transfer returns number of messages transferred */
 457         if (ret != 2) {
 458                 pr_err("%s: i2c_read failed to transfer all messages\n",
 459                         DRIVER_NAME);
 460                 if (ret < 0)
 461                         return ret;
 462                 else
 463                         return -EIO;
 464         } else {
 465                 return 0;
 466         }
 467 }
 468 EXPORT_SYMBOL(twl_i2c_read);
 469
 470 /**
 471  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 472  * @mod_no: module number
 473  * @value: the value to be written 8 bit
 474  * @reg: register address (just offset will do)
 475  *
 476  * Returns result of operation - 0 is success
 477  */
 478 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 479 {
 480
 481         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 482         u8 temp_buffer[2] = { 0 };
 483         /* offset 1 contains the data */
 484         temp_buffer[1] = value;
 485         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 486 }
 487 EXPORT_SYMBOL(twl_i2c_write_u8);
 488
 489 /**
 490  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 491  * @mod_no: module number
 492  * @value: the value read 8 bit
 493  * @reg: register address (just offset will do)
 494  *
 495  * Returns result of operation - 0 is success
 496  */
 497 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 498 {
 499         return twl_i2c_read(mod_no, value, reg, 1);
 500 }
 501 EXPORT_SYMBOL(twl_i2c_read_u8);
 502
 503 /*----------------------------------------------------------------------*/
 504
 505 /**
 506  * twl_read_idcode_register - API to read the IDCODE register.
 507  *
 508  * Unlocks the IDCODE register and read the 32 bit value.
 509  */
 510 static int twl_read_idcode_register(void)
 511 {
 512         int err;
 513
 514         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 515                                                 REG_UNLOCK_TEST_REG);
 516         if (err) {
 517                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 518                 goto fail;
 519         }
 520
 521         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 522                                                 REG_IDCODE_7_0, 4);
 523         if (err) {
 524                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 525                 goto fail;
 526         }
 527
 528         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 529         if (err)
 530                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 531 fail:
 532         return err;
 533 }
 534
 535 /**
 536  * twl_get_type - API to get TWL Si type.
 537  *
 538  * Api to get the TWL Si type from IDCODE value.
 539  */
 540 int twl_get_type(void)
 541 {
 542         return TWL_SIL_TYPE(twl_idcode);
 543 }
 544 EXPORT_SYMBOL_GPL(twl_get_type);
 545
 546 /**
 547  * twl_get_version - API to get TWL Si version.
 548  *
 549  * Api to get the TWL Si version from IDCODE value.
 550  */
 551 int twl_get_version(void)
 552 {
 553         return TWL_SIL_REV(twl_idcode);
 554 }
 555 EXPORT_SYMBOL_GPL(twl_get_version);
 556
 557 static struct device *
 558 add_numbered_child(unsigned chip, const char *name, int num,
 559                 void *pdata, unsigned pdata_len,
 560                 bool can_wakeup, int irq0, int irq1)
 561 {
 562         struct platform_device  *pdev;
 563         struct twl_client       *twl = &twl_modules[chip];
 564         int                     status;
 565
 566         pdev = platform_device_alloc(name, num);
 567         if (!pdev) {
 568                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 569                 status = -ENOMEM;
 570                 goto err;
 571         }
 572
 573         pdev->dev.parent = &twl->client->dev;
 574
 575         if (pdata) {
 576                 status = platform_device_add_data(pdev, pdata, pdata_len);
 577                 if (status < 0) {
 578                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 579                         goto err;
 580                 }
 581         }
 582
 583         if (irq0) {
 584                 struct resource r[2] = {
 585                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 586                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 587                 };
 588
 589                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 590                 if (status < 0) {
 591                         dev_dbg(&pdev->dev, "can't add irqs\n");
 592                         goto err;
 593                 }
 594         }
 595
 596         status = platform_device_add(pdev);
 597         if (status == 0)
 598                 device_init_wakeup(&pdev->dev, can_wakeup);
 599
 600 err:
 601         if (status < 0) {
 602                 platform_device_put(pdev);
 603                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 604                 return ERR_PTR(status);
 605         }
 606         return &pdev->dev;
 607 }
 608
 609 static inline struct device *add_child(unsigned chip, const char *name,
 610                 void *pdata, unsigned pdata_len,
 611                 bool can_wakeup, int irq0, int irq1)
 612 {
 613         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 614                 can_wakeup, irq0, irq1);
 615 }
 616
 617 static struct device *
 618 add_regulator_linked(int num, struct regulator_init_data *pdata,
 619                 struct regulator_consumer_supply *consumers,
 620                 unsigned num_consumers, unsigned long features)
 621 {
 622         unsigned sub_chip_id;
 623         struct twl_regulator_driver_data drv_data;
 624
 625         /* regulator framework demands init_data ... */
 626         if (!pdata)
 627                 return NULL;
 628
 629         if (consumers) {
 630                 pdata->consumer_supplies = consumers;
 631                 pdata->num_consumer_supplies = num_consumers;
 632         }
 633
 634         if (pdata->driver_data) {
 635                 /* If we have existing drv_data, just add the flags */
 636                 struct twl_regulator_driver_data *tmp;
 637                 tmp = pdata->driver_data;
 638                 tmp->features |= features;
 639         } else {
 640                 /* add new driver data struct, used only during init */
 641                 drv_data.features = features;
 642                 drv_data.set_voltage = NULL;
 643                 drv_data.get_voltage = NULL;
 644                 drv_data.data = NULL;
 645                 pdata->driver_data = &drv_data;
 646         }
 647
 648         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 649         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 650         return add_numbered_child(sub_chip_id, "twl_reg", num,
 651                 pdata, sizeof(*pdata), false, 0, 0);
 652 }
 653
 654 static struct device *
 655 add_regulator(int num, struct regulator_init_data *pdata,
 656                 unsigned long features)
 657 {
 658         return add_regulator_linked(num, pdata, NULL, 0, features);
 659 }
 660
 661 /*
 662  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 663  * for the PIH, and the next are for the PWR_INT SIH, since
 664  * that's how twl_init_irq() sets things up.
 665  */
 666
 667 static int
 668 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 669                 unsigned long features)
 670 {
 671         struct device   *child;
 672         unsigned sub_chip_id;
 673
 674         if (twl_has_gpio() && pdata->gpio) {
 675                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 676                                 pdata->gpio, sizeof(*pdata->gpio),
 677                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 678                 if (IS_ERR(child))
 679                         return PTR_ERR(child);
 680         }
 681
 682         if (twl_has_keypad() && pdata->keypad) {
 683                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 684                                 pdata->keypad, sizeof(*pdata->keypad),
 685                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 686                 if (IS_ERR(child))
 687                         return PTR_ERR(child);
 688         }
 689
 690         if (twl_has_madc() && pdata->madc) {
 691                 child = add_child(2, "twl4030_madc",
 692                                 pdata->madc, sizeof(*pdata->madc),
 693                                 true, irq_base + MADC_INTR_OFFSET, 0);
 694                 if (IS_ERR(child))
 695                         return PTR_ERR(child);
 696         }
 697
 698         if (twl_has_rtc()) {
 699                 /*
 700                  * REVISIT platform_data here currently might expose the
 701                  * "msecure" line ... but for now we just expect board
 702                  * setup to tell the chip "it's always ok to SET_TIME".
 703                  * Eventually, Linux might become more aware of such
 704                  * HW security concerns, and "least privilege".
 705                  */
 706                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 707                 child = add_child(sub_chip_id, "twl_rtc",
 708                                 NULL, 0,
 709                                 true, irq_base + RTC_INTR_OFFSET, 0);
 710                 if (IS_ERR(child))
 711                         return PTR_ERR(child);
 712         }
 713
 714         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 715
 716                 static struct regulator_consumer_supply usb1v5 = {
 717                         .supply =       "usb1v5",
 718                 };
 719                 static struct regulator_consumer_supply usb1v8 = {
 720                         .supply =       "usb1v8",
 721                 };
 722                 static struct regulator_consumer_supply usb3v1[] = {
 723                         { .supply =     "usb3v1" },
 724                         { .supply =     "bci3v1" },
 725                 };
 726
 727         /* First add the regulators so that they can be used by transceiver */
 728                 if (twl_has_regulator()) {
 729                         /* this is a template that gets copied */
 730                         struct regulator_init_data usb_fixed = {
 731                                 .constraints.valid_modes_mask =
 732                                         REGULATOR_MODE_NORMAL
 733                                         | REGULATOR_MODE_STANDBY,
 734                                 .constraints.valid_ops_mask =
 735                                         REGULATOR_CHANGE_MODE
 736                                         | REGULATOR_CHANGE_STATUS,
 737                         };
 738
 739                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 740                                                       &usb_fixed, &usb1v5, 1,
 741                                                       features);
 742                         if (IS_ERR(child))
 743                                 return PTR_ERR(child);
 744
 745                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 746                                                       &usb_fixed, &usb1v8, 1,
 747                                                       features);
 748                         if (IS_ERR(child))
 749                                 return PTR_ERR(child);
 750
 751                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 752                                                       &usb_fixed, usb3v1, 2,
 753                                                       features);
 754                         if (IS_ERR(child))
 755                                 return PTR_ERR(child);
 756
 757                 }
 758
 759                 child = add_child(0, "twl4030_usb",
 760                                 pdata->usb, sizeof(*pdata->usb),
 761                                 true,
 762                                 /* irq0 = USB_PRES, irq1 = USB */
 763                                 irq_base + USB_PRES_INTR_OFFSET,
 764                                 irq_base + USB_INTR_OFFSET);
 765
 766                 if (IS_ERR(child))
 767                         return PTR_ERR(child);
 768
 769                 /* we need to connect regulators to this transceiver */
 770                 if (twl_has_regulator() && child) {
 771                         usb1v5.dev_name = dev_name(child);
 772                         usb1v8.dev_name = dev_name(child);
 773                         usb3v1[0].dev_name = dev_name(child);
 774                 }
 775         }
 776         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 777
 778                 static struct regulator_consumer_supply usb3v3;
 779                 int regulator;
 780
 781                 if (twl_has_regulator()) {
 782                         /* this is a template that gets copied */
 783                         struct regulator_init_data usb_fixed = {
 784                                 .constraints.valid_modes_mask =
 785                                         REGULATOR_MODE_NORMAL
 786                                         | REGULATOR_MODE_STANDBY,
 787                                 .constraints.valid_ops_mask =
 788                                         REGULATOR_CHANGE_MODE
 789                                         | REGULATOR_CHANGE_STATUS,
 790                         };
 791
 792                         if (features & TWL6025_SUBCLASS) {
 793                                 usb3v3.supply = "ldousb";
 794                                 regulator = TWL6025_REG_LDOUSB;
 795                         } else {
 796                                 usb3v3.supply = "vusb";
 797                                 regulator = TWL6030_REG_VUSB;
 798                         }
 799                         child = add_regulator_linked(regulator, &usb_fixed,
 800                                                         &usb3v3, 1,
 801                                                         features);
 802                         if (IS_ERR(child))
 803                                 return PTR_ERR(child);
 804                 }
 805
 806                 pdata->usb->features = features;
 807
 808                 child = add_child(0, "twl6030_usb",
 809                         pdata->usb, sizeof(*pdata->usb),
 810                         true,
 811                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 812                         irq_base + USBOTG_INTR_OFFSET,
 813                         irq_base + USB_PRES_INTR_OFFSET);
 814
 815                 if (IS_ERR(child))
 816                         return PTR_ERR(child);
 817                 /* we need to connect regulators to this transceiver */
 818                 if (twl_has_regulator() && child)
 819                         usb3v3.dev_name = dev_name(child);
 820         } else if (twl_has_regulator() && twl_class_is_6030()) {
 821                 if (features & TWL6025_SUBCLASS)
 822                         child = add_regulator(TWL6025_REG_LDOUSB,
 823                                                 pdata->ldousb, features);
 824                 else
 825                         child = add_regulator(TWL6030_REG_VUSB,
 826                                                 pdata->vusb, features);
 827
 828                         if (IS_ERR(child))
 829                                         return PTR_ERR(child);
 830         }
 831
 832         if (twl_has_watchdog() && twl_class_is_4030()) {
 833                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 834                 if (IS_ERR(child))
 835                         return PTR_ERR(child);
 836         }
 837
 838         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 839                 child = add_child(1, "twl4030_pwrbutton",
 840                                 NULL, 0, true, irq_base + 8 + 0, 0);
 841                 if (IS_ERR(child))
 842                         return PTR_ERR(child);
 843         }
 844
 845         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 846                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 847                 child = add_child(sub_chip_id, "twl4030-audio",
 848                                 pdata->audio, sizeof(*pdata->audio),
 849                                 false, 0, 0);
 850                 if (IS_ERR(child))
 851                         return PTR_ERR(child);
 852         }
 853
 854         /* twl4030 regulators */
 855         if (twl_has_regulator() && twl_class_is_4030()) {
 856                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 857                                         features);
 858                 if (IS_ERR(child))
 859                         return PTR_ERR(child);
 860
 861                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 862                                         features);
 863                 if (IS_ERR(child))
 864                         return PTR_ERR(child);
 865
 866                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 867                                         features);
 868                 if (IS_ERR(child))
 869                         return PTR_ERR(child);
 870
 871                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 872                                         features);
 873                 if (IS_ERR(child))
 874                         return PTR_ERR(child);
 875
 876                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 877                                         features);
 878                 if (IS_ERR(child))
 879                         return PTR_ERR(child);
 880
 881                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 882                                         features);
 883                 if (IS_ERR(child))
 884                         return PTR_ERR(child);
 885
 886                 child = add_regulator((features & TWL4030_VAUX2)
 887                                         ? TWL4030_REG_VAUX2_4030
 888                                         : TWL4030_REG_VAUX2,
 889                                 pdata->vaux2, features);
 890                 if (IS_ERR(child))
 891                         return PTR_ERR(child);
 892
 893                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 894                                         features);
 895                 if (IS_ERR(child))
 896                         return PTR_ERR(child);
 897
 898                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 899                                         features);
 900                 if (IS_ERR(child))
 901                         return PTR_ERR(child);
 902
 903                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 904                                         features);
 905                 if (IS_ERR(child))
 906                         return PTR_ERR(child);
 907         }
 908
 909         /* maybe add LDOs that are omitted on cost-reduced parts */
 910         if (twl_has_regulator() && !(features & TPS_SUBSET)
 911           && twl_class_is_4030()) {
 912                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 913                                         features);
 914                 if (IS_ERR(child))
 915                         return PTR_ERR(child);
 916
 917                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 918                                         features);
 919                 if (IS_ERR(child))
 920                         return PTR_ERR(child);
 921
 922                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 923                                         features);
 924                 if (IS_ERR(child))
 925                         return PTR_ERR(child);
 926
 927                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 928                                         features);
 929                 if (IS_ERR(child))
 930                         return PTR_ERR(child);
 931
 932                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 933                                         features);
 934                 if (IS_ERR(child))
 935                         return PTR_ERR(child);
 936
 937                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 938                                         features);
 939                 if (IS_ERR(child))
 940                         return PTR_ERR(child);
 941         }
 942
 943         /* twl6030 regulators */
 944         if (twl_has_regulator() && twl_class_is_6030() &&
 945                         !(features & TWL6025_SUBCLASS)) {
 946                 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
 947                                         features);
 948                 if (IS_ERR(child))
 949                         return PTR_ERR(child);
 950
 951                 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
 952                                         features);
 953                 if (IS_ERR(child))
 954                         return PTR_ERR(child);
 955
 956                 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
 957                                         features);
 958                 if (IS_ERR(child))
 959                         return PTR_ERR(child);
 960
 961                 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8,
 962                                         features);
 963                 if (IS_ERR(child))
 964                         return PTR_ERR(child);
 965
 966                 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1,
 967                                         features);
 968                 if (IS_ERR(child))
 969                         return PTR_ERR(child);
 970
 971                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 972                                         features);
 973                 if (IS_ERR(child))
 974                         return PTR_ERR(child);
 975
 976                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 977                                         features);
 978                 if (IS_ERR(child))
 979                         return PTR_ERR(child);
 980
 981                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 982                                         features);
 983                 if (IS_ERR(child))
 984                         return PTR_ERR(child);
 985
 986                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 987                                         features);
 988                 if (IS_ERR(child))
 989                         return PTR_ERR(child);
 990
 991                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 992                                         features);
 993                 if (IS_ERR(child))
 994                         return PTR_ERR(child);
 995
 996                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 997                                         features);
 998                 if (IS_ERR(child))
 999                         return PTR_ERR(child);
1000
1001                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
1002                                         features);
1003                 if (IS_ERR(child))
1004                         return PTR_ERR(child);
1005
1006                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
1007                                         features);
1008                 if (IS_ERR(child))
1009                         return PTR_ERR(child);
1010
1011                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
1012                                         features);
1013                 if (IS_ERR(child))
1014                         return PTR_ERR(child);
1015         }
1016
1017         /* 6030 and 6025 share this regulator */
1018         if (twl_has_regulator() && twl_class_is_6030()) {
1019                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
1020                                         features);
1021                 if (IS_ERR(child))
1022                         return PTR_ERR(child);
1023         }
1024
1025         /* twl6025 regulators */
1026         if (twl_has_regulator() && twl_class_is_6030() &&
1027                         (features & TWL6025_SUBCLASS)) {
1028                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1029                                         features);
1030                 if (IS_ERR(child))
1031                         return PTR_ERR(child);
1032
1033                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1034                                         features);
1035                 if (IS_ERR(child))
1036                         return PTR_ERR(child);
1037
1038                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1039                                         features);
1040                 if (IS_ERR(child))
1041                         return PTR_ERR(child);
1042
1043                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1044                                         features);
1045                 if (IS_ERR(child))
1046                         return PTR_ERR(child);
1047
1048                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1049                                         features);
1050                 if (IS_ERR(child))
1051                         return PTR_ERR(child);
1052
1053                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1054                                         features);
1055                 if (IS_ERR(child))
1056                         return PTR_ERR(child);
1057
1058                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1059                                         features);
1060                 if (IS_ERR(child))
1061                         return PTR_ERR(child);
1062
1063                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1064                                         features);
1065                 if (IS_ERR(child))
1066                         return PTR_ERR(child);
1067
1068                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1069                                         features);
1070                 if (IS_ERR(child))
1071                         return PTR_ERR(child);
1072
1073                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1074                                         features);
1075                 if (IS_ERR(child))
1076                         return PTR_ERR(child);
1077
1078                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1079                                         features);
1080                 if (IS_ERR(child))
1081                         return PTR_ERR(child);
1082
1083         }
1084
1085         if (twl_has_bci() && pdata->bci &&
1086                         !(features & (TPS_SUBSET | TWL5031))) {
1087                 child = add_child(3, "twl4030_bci",
1088                                 pdata->bci, sizeof(*pdata->bci), false,
1089                                 /* irq0 = CHG_PRES, irq1 = BCI */
1090                                 irq_base + BCI_PRES_INTR_OFFSET,
1091                                 irq_base + BCI_INTR_OFFSET);
1092                 if (IS_ERR(child))
1093                         return PTR_ERR(child);
1094         }
1095
1096         return 0;
1097 }
1098
1099 /*----------------------------------------------------------------------*/
1100
1101 /*
1102  * These three functions initialize the on-chip clock framework,
1103  * letting it generate the right frequencies for USB, MADC, and
1104  * other purposes.
1105  */
1106 static inline int __init protect_pm_master(void)
1107 {
1108         int e = 0;
1109
1110         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1111                         TWL4030_PM_MASTER_PROTECT_KEY);
1112         return e;
1113 }
1114
1115 static inline int __init unprotect_pm_master(void)
1116 {
1117         int e = 0;
1118
1119         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1120                         TWL4030_PM_MASTER_KEY_CFG1,
1121                         TWL4030_PM_MASTER_PROTECT_KEY);
1122         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1123                         TWL4030_PM_MASTER_KEY_CFG2,
1124                         TWL4030_PM_MASTER_PROTECT_KEY);
1125
1126         return e;
1127 }
1128
1129 static void clocks_init(struct device *dev,
1130                         struct twl4030_clock_init_data *clock)
1131 {
1132         int e = 0;
1133         struct clk *osc;
1134         u32 rate;
1135         u8 ctrl = HFCLK_FREQ_26_MHZ;
1136
1137 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1138         if (cpu_is_omap2430())
1139                 osc = clk_get(dev, "osc_ck");
1140         else
1141                 osc = clk_get(dev, "osc_sys_ck");
1142
1143         if (IS_ERR(osc)) {
1144                 printk(KERN_WARNING "Skipping twl internal clock init and "
1145                                 "using bootloader value (unknown osc rate)\n");
1146                 return;
1147         }
1148
1149         rate = clk_get_rate(osc);
1150         clk_put(osc);
1151
1152 #else
1153         /* REVISIT for non-OMAP systems, pass the clock rate from
1154          * board init code, using platform_data.
1155          */
1156         osc = ERR_PTR(-EIO);
1157
1158         printk(KERN_WARNING "Skipping twl internal clock init and "
1159                "using bootloader value (unknown osc rate)\n");
1160
1161         return;
1162 #endif
1163
1164         switch (rate) {
1165         case 19200000:
1166                 ctrl = HFCLK_FREQ_19p2_MHZ;
1167                 break;
1168         case 26000000:
1169                 ctrl = HFCLK_FREQ_26_MHZ;
1170                 break;
1171         case 38400000:
1172                 ctrl = HFCLK_FREQ_38p4_MHZ;
1173                 break;
1174         }
1175
1176         ctrl |= HIGH_PERF_SQ;
1177         if (clock && clock->ck32k_lowpwr_enable)
1178                 ctrl |= CK32K_LOWPWR_EN;
1179
1180         e |= unprotect_pm_master();
1181         /* effect->MADC+USB ck en */
1182         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1183         e |= protect_pm_master();
1184
1185         if (e < 0)
1186                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1187 }
1188
1189 /*----------------------------------------------------------------------*/
1190
1191
1192 static int twl_remove(struct i2c_client *client)
1193 {
1194         unsigned i, num_slaves;
1195         int status;
1196
1197         if (twl_class_is_4030()) {
1198                 status = twl4030_exit_irq();
1199                 num_slaves = TWL_NUM_SLAVES;
1200         } else {
1201                 status = twl6030_exit_irq();
1202                 num_slaves = TWL_NUM_SLAVES - 1;
1203         }
1204
1205         if (status < 0)
1206                 return status;
1207
1208         for (i = 0; i < num_slaves; i++) {
1209                 struct twl_client       *twl = &twl_modules[i];
1210
1211                 if (twl->client && twl->client != client)
1212                         i2c_unregister_device(twl->client);
1213                 twl_modules[i].client = NULL;
1214         }
1215         inuse = false;
1216         return 0;
1217 }
1218
1219 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1220 static int __devinit
1221 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1222 {
1223         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1224         struct device_node              *node = client->dev.of_node;
1225         int                             irq_base = 0;
1226         int                             status;
1227         unsigned                        i, num_slaves;
1228
1229         if (node && !pdata) {
1230                 /*
1231                  * XXX: Temporary pdata until the information is correctly
1232                  * retrieved by every TWL modules from DT.
1233                  */
1234                 pdata = devm_kzalloc(&client->dev,
1235                                      sizeof(struct twl4030_platform_data),
1236                                      GFP_KERNEL);
1237                 if (!pdata)
1238                         return -ENOMEM;
1239         }
1240
1241         if (!pdata) {
1242                 dev_dbg(&client->dev, "no platform data?\n");
1243                 return -EINVAL;
1244         }
1245
1246         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1247                 dev_dbg(&client->dev, "can't talk I2C?\n");
1248                 return -EIO;
1249         }
1250
1251         if (inuse) {
1252                 dev_dbg(&client->dev, "driver is already in use\n");
1253                 return -EBUSY;
1254         }
1255
1256         if ((id->driver_data) & TWL6030_CLASS) {
1257                 twl_id = TWL6030_CLASS_ID;
1258                 twl_map = &twl6030_map[0];
1259                 num_slaves = TWL_NUM_SLAVES - 1;
1260         } else {
1261                 twl_id = TWL4030_CLASS_ID;
1262                 twl_map = &twl4030_map[0];
1263                 num_slaves = TWL_NUM_SLAVES;
1264         }
1265
1266         for (i = 0; i < num_slaves; i++) {
1267                 struct twl_client *twl = &twl_modules[i];
1268
1269                 twl->address = client->addr + i;
1270                 if (i == 0) {
1271                         twl->client = client;
1272                 } else {
1273                         twl->client = i2c_new_dummy(client->adapter,
1274                                         twl->address);
1275                         if (!twl->client) {
1276                                 dev_err(&client->dev,
1277                                         "can't attach client %d\n", i);
1278                                 status = -ENOMEM;
1279                                 goto fail;
1280                         }
1281                 }
1282                 mutex_init(&twl->xfer_lock);
1283         }
1284
1285         inuse = true;
1286
1287         /* setup clock framework */
1288         clocks_init(&client->dev, pdata->clock);
1289
1290         /* read TWL IDCODE Register */
1291         if (twl_id == TWL4030_CLASS_ID) {
1292                 status = twl_read_idcode_register();
1293                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1294         }
1295
1296         /* load power event scripts */
1297         if (twl_has_power() && pdata->power)
1298                 twl4030_power_init(pdata->power);
1299
1300         /* Maybe init the T2 Interrupt subsystem */
1301         if (client->irq) {
1302                 if (twl_class_is_4030()) {
1303                         twl4030_init_chip_irq(id->name);
1304                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1305                 } else {
1306                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1307                 }
1308
1309                 if (irq_base < 0) {
1310                         status = irq_base;
1311                         goto fail;
1312                 }
1313         }
1314
1315         /*
1316          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1317          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1318          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1319          */
1320         if (twl_class_is_4030()) {
1321                 u8 temp;
1322
1323                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1324                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1325                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1326                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1327         }
1328
1329         status = -ENODEV;
1330         if (node)
1331                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1332         if (status)
1333                 status = add_children(pdata, irq_base, id->driver_data);
1334
1335 fail:
1336         if (status < 0)
1337                 twl_remove(client);
1338
1339         return status;
1340 }
1341
1342 static const struct i2c_device_id twl_ids[] = {
1343         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1344         { "twl5030", 0 },               /* T2 updated */
1345         { "twl5031", TWL5031 },         /* TWL5030 updated */
1346         { "tps65950", 0 },              /* catalog version of twl5030 */
1347         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1348         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1349         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1350                                            and vibrator. Charger in USB module*/
1351         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1352         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1353         { /* end of list */ },
1354 };
1355 MODULE_DEVICE_TABLE(i2c, twl_ids);
1356
1357 /* One Client Driver , 4 Clients */
1358 static struct i2c_driver twl_driver = {
1359         .driver.name    = DRIVER_NAME,
1360         .id_table       = twl_ids,
1361         .probe          = twl_probe,
1362         .remove         = twl_remove,
1363 };
1364
1365 static int __init twl_init(void)
1366 {
1367         return i2c_add_driver(&twl_driver);
1368 }
1369 subsys_initcall(twl_init);
1370
1371 static void __exit twl_exit(void)
1372 {
1373         i2c_del_driver(&twl_driver);
1374 }
1375 module_exit(twl_exit);
1376
1377 MODULE_AUTHOR("Texas Instruments, Inc.");
1378 MODULE_DESCRIPTION("I2C Core interface for TWL");
1379 MODULE_LICENSE("GPL");