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 "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 /* chip-specific feature flags, for i2c_device_id.driver_data */
 229 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 230 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 231 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 232 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 233
 234 /*----------------------------------------------------------------------*/
 235
 236 /* is driver active, bound to a chip? */
 237 static bool inuse;
 238
 239 /* TWL IDCODE Register value */
 240 static u32 twl_idcode;
 241
 242 static unsigned int twl_id;
 243 unsigned int twl_rev(void)
 244 {
 245         return twl_id;
 246 }
 247 EXPORT_SYMBOL(twl_rev);
 248
 249 /* Structure for each TWL4030/TWL6030 Slave */
 250 struct twl_client {
 251         struct i2c_client *client;
 252         u8 address;
 253
 254         /* max numb of i2c_msg required is for read =2 */
 255         struct i2c_msg xfer_msg[2];
 256
 257         /* To lock access to xfer_msg */
 258         struct mutex xfer_lock;
 259 };
 260
 261 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 262
 263 /* mapping the module id to slave id and base address */
 264 struct twl_mapping {
 265         unsigned char sid;      /* Slave ID */
 266         unsigned char base;     /* base address */
 267 };
 268 static struct twl_mapping *twl_map;
 269
 270 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 271         /*
 272          * NOTE:  don't change this table without updating the
 273          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 274          * so they continue to match the order in this table.
 275          */
 276
 277         { 0, TWL4030_BASEADD_USB },
 278
 279         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 280         { 1, TWL4030_BASEADD_GPIO },
 281         { 1, TWL4030_BASEADD_INTBR },
 282         { 1, TWL4030_BASEADD_PIH },
 283         { 1, TWL4030_BASEADD_TEST },
 284
 285         { 2, TWL4030_BASEADD_KEYPAD },
 286         { 2, TWL4030_BASEADD_MADC },
 287         { 2, TWL4030_BASEADD_INTERRUPTS },
 288         { 2, TWL4030_BASEADD_LED },
 289         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 290         { 2, TWL4030_BASEADD_PRECHARGE },
 291         { 2, TWL4030_BASEADD_PWM0 },
 292         { 2, TWL4030_BASEADD_PWM1 },
 293         { 2, TWL4030_BASEADD_PWMA },
 294         { 2, TWL4030_BASEADD_PWMB },
 295         { 2, TWL5031_BASEADD_ACCESSORY },
 296         { 2, TWL5031_BASEADD_INTERRUPTS },
 297
 298         { 3, TWL4030_BASEADD_BACKUP },
 299         { 3, TWL4030_BASEADD_INT },
 300         { 3, TWL4030_BASEADD_PM_MASTER },
 301         { 3, TWL4030_BASEADD_PM_RECEIVER },
 302         { 3, TWL4030_BASEADD_RTC },
 303         { 3, TWL4030_BASEADD_SECURED_REG },
 304 };
 305
 306 static struct twl_mapping twl6030_map[] = {
 307         /*
 308          * NOTE:  don't change this table without updating the
 309          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 310          * so they continue to match the order in this table.
 311          */
 312         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 313         { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO },
 314         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 315         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 316         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 317
 318         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 319         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 320         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 321         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 322         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 323
 324         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 325         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 326         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 327         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 328         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 329
 330         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 331         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 332         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 333         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 334         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 335         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 336         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 337
 338         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 339         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 340         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 341 };
 342
 343 /*----------------------------------------------------------------------*/
 344
 345 /* Exported Functions */
 346
 347 /**
 348  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 349  * @mod_no: module number
 350  * @value: an array of num_bytes+1 containing data to write
 351  * @reg: register address (just offset will do)
 352  * @num_bytes: number of bytes to transfer
 353  *
 354  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 355  * valid data starts at Offset 1.
 356  *
 357  * Returns the result of operation - 0 is success
 358  */
 359 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 360 {
 361         int ret;
 362         int sid;
 363         struct twl_client *twl;
 364         struct i2c_msg *msg;
 365
 366         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 367                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 368                 return -EPERM;
 369         }
 370         if (unlikely(!inuse)) {
 371                 pr_err("%s: not initialized\n", DRIVER_NAME);
 372                 return -EPERM;
 373         }
 374         sid = twl_map[mod_no].sid;
 375         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 376                 pr_err("%s: module %d is not part of the pmic\n",
 377                        DRIVER_NAME, mod_no);
 378                 return -EINVAL;
 379         }
 380         twl = &twl_modules[sid];
 381
 382         mutex_lock(&twl->xfer_lock);
 383         /*
 384          * [MSG1]: fill the register address data
 385          * fill the data Tx buffer
 386          */
 387         msg = &twl->xfer_msg[0];
 388         msg->addr = twl->address;
 389         msg->len = num_bytes + 1;
 390         msg->flags = 0;
 391         msg->buf = value;
 392         /* over write the first byte of buffer with the register address */
 393         *value = twl_map[mod_no].base + reg;
 394         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 395         mutex_unlock(&twl->xfer_lock);
 396
 397         /* i2c_transfer returns number of messages transferred */
 398         if (ret != 1) {
 399                 pr_err("%s: i2c_write failed to transfer all messages\n",
 400                         DRIVER_NAME);
 401                 if (ret < 0)
 402                         return ret;
 403                 else
 404                         return -EIO;
 405         } else {
 406                 return 0;
 407         }
 408 }
 409 EXPORT_SYMBOL(twl_i2c_write);
 410
 411 /**
 412  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 413  * @mod_no: module number
 414  * @value: an array of num_bytes containing data to be read
 415  * @reg: register address (just offset will do)
 416  * @num_bytes: number of bytes to transfer
 417  *
 418  * Returns result of operation - num_bytes is success else failure.
 419  */
 420 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 421 {
 422         int ret;
 423         u8 val;
 424         int sid;
 425         struct twl_client *twl;
 426         struct i2c_msg *msg;
 427
 428         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 429                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 430                 return -EPERM;
 431         }
 432         if (unlikely(!inuse)) {
 433                 pr_err("%s: not initialized\n", DRIVER_NAME);
 434                 return -EPERM;
 435         }
 436         sid = twl_map[mod_no].sid;
 437         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 438                 pr_err("%s: module %d is not part of the pmic\n",
 439                        DRIVER_NAME, mod_no);
 440                 return -EINVAL;
 441         }
 442         twl = &twl_modules[sid];
 443
 444         mutex_lock(&twl->xfer_lock);
 445         /* [MSG1] fill the register address data */
 446         msg = &twl->xfer_msg[0];
 447         msg->addr = twl->address;
 448         msg->len = 1;
 449         msg->flags = 0; /* Read the register value */
 450         val = twl_map[mod_no].base + reg;
 451         msg->buf = &val;
 452         /* [MSG2] fill the data rx buffer */
 453         msg = &twl->xfer_msg[1];
 454         msg->addr = twl->address;
 455         msg->flags = I2C_M_RD;  /* Read the register value */
 456         msg->len = num_bytes;   /* only n bytes */
 457         msg->buf = value;
 458         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 459         mutex_unlock(&twl->xfer_lock);
 460
 461         /* i2c_transfer returns number of messages transferred */
 462         if (ret != 2) {
 463                 pr_err("%s: i2c_read failed to transfer all messages\n",
 464                         DRIVER_NAME);
 465                 if (ret < 0)
 466                         return ret;
 467                 else
 468                         return -EIO;
 469         } else {
 470                 return 0;
 471         }
 472 }
 473 EXPORT_SYMBOL(twl_i2c_read);
 474
 475 /**
 476  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 477  * @mod_no: module number
 478  * @value: the value to be written 8 bit
 479  * @reg: register address (just offset will do)
 480  *
 481  * Returns result of operation - 0 is success
 482  */
 483 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 484 {
 485
 486         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 487         u8 temp_buffer[2] = { 0 };
 488         /* offset 1 contains the data */
 489         temp_buffer[1] = value;
 490         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 491 }
 492 EXPORT_SYMBOL(twl_i2c_write_u8);
 493
 494 /**
 495  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 496  * @mod_no: module number
 497  * @value: the value read 8 bit
 498  * @reg: register address (just offset will do)
 499  *
 500  * Returns result of operation - 0 is success
 501  */
 502 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 503 {
 504         return twl_i2c_read(mod_no, value, reg, 1);
 505 }
 506 EXPORT_SYMBOL(twl_i2c_read_u8);
 507
 508 /*----------------------------------------------------------------------*/
 509
 510 /**
 511  * twl_read_idcode_register - API to read the IDCODE register.
 512  *
 513  * Unlocks the IDCODE register and read the 32 bit value.
 514  */
 515 static int twl_read_idcode_register(void)
 516 {
 517         int err;
 518
 519         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 520                                                 REG_UNLOCK_TEST_REG);
 521         if (err) {
 522                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 523                 goto fail;
 524         }
 525
 526         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 527                                                 REG_IDCODE_7_0, 4);
 528         if (err) {
 529                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 530                 goto fail;
 531         }
 532
 533         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 534         if (err)
 535                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 536 fail:
 537         return err;
 538 }
 539
 540 /**
 541  * twl_get_type - API to get TWL Si type.
 542  *
 543  * Api to get the TWL Si type from IDCODE value.
 544  */
 545 int twl_get_type(void)
 546 {
 547         return TWL_SIL_TYPE(twl_idcode);
 548 }
 549 EXPORT_SYMBOL_GPL(twl_get_type);
 550
 551 /**
 552  * twl_get_version - API to get TWL Si version.
 553  *
 554  * Api to get the TWL Si version from IDCODE value.
 555  */
 556 int twl_get_version(void)
 557 {
 558         return TWL_SIL_REV(twl_idcode);
 559 }
 560 EXPORT_SYMBOL_GPL(twl_get_version);
 561
 562 static struct device *
 563 add_numbered_child(unsigned chip, const char *name, int num,
 564                 void *pdata, unsigned pdata_len,
 565                 bool can_wakeup, int irq0, int irq1)
 566 {
 567         struct platform_device  *pdev;
 568         struct twl_client       *twl = &twl_modules[chip];
 569         int                     status;
 570
 571         pdev = platform_device_alloc(name, num);
 572         if (!pdev) {
 573                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 574                 status = -ENOMEM;
 575                 goto err;
 576         }
 577
 578         device_init_wakeup(&pdev->dev, can_wakeup);
 579         pdev->dev.parent = &twl->client->dev;
 580
 581         if (pdata) {
 582                 status = platform_device_add_data(pdev, pdata, pdata_len);
 583                 if (status < 0) {
 584                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 585                         goto err;
 586                 }
 587         }
 588
 589         if (irq0) {
 590                 struct resource r[2] = {
 591                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 592                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 593                 };
 594
 595                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 596                 if (status < 0) {
 597                         dev_dbg(&pdev->dev, "can't add irqs\n");
 598                         goto err;
 599                 }
 600         }
 601
 602         status = platform_device_add(pdev);
 603
 604 err:
 605         if (status < 0) {
 606                 platform_device_put(pdev);
 607                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 608                 return ERR_PTR(status);
 609         }
 610         return &pdev->dev;
 611 }
 612
 613 static inline struct device *add_child(unsigned chip, const char *name,
 614                 void *pdata, unsigned pdata_len,
 615                 bool can_wakeup, int irq0, int irq1)
 616 {
 617         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 618                 can_wakeup, irq0, irq1);
 619 }
 620
 621 static struct device *
 622 add_regulator_linked(int num, struct regulator_init_data *pdata,
 623                 struct regulator_consumer_supply *consumers,
 624                 unsigned num_consumers, unsigned long features)
 625 {
 626         unsigned sub_chip_id;
 627         struct twl_regulator_driver_data drv_data;
 628
 629         /* regulator framework demands init_data ... */
 630         if (!pdata)
 631                 return NULL;
 632
 633         if (consumers) {
 634                 pdata->consumer_supplies = consumers;
 635                 pdata->num_consumer_supplies = num_consumers;
 636         }
 637
 638         if (pdata->driver_data) {
 639                 /* If we have existing drv_data, just add the flags */
 640                 struct twl_regulator_driver_data *tmp;
 641                 tmp = pdata->driver_data;
 642                 tmp->features |= features;
 643         } else {
 644                 /* add new driver data struct, used only during init */
 645                 drv_data.features = features;
 646                 drv_data.set_voltage = NULL;
 647                 drv_data.get_voltage = NULL;
 648                 drv_data.data = NULL;
 649                 pdata->driver_data = &drv_data;
 650         }
 651
 652         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 653         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 654         return add_numbered_child(sub_chip_id, "twl_reg", num,
 655                 pdata, sizeof(*pdata), false, 0, 0);
 656 }
 657
 658 static struct device *
 659 add_regulator(int num, struct regulator_init_data *pdata,
 660                 unsigned long features)
 661 {
 662         return add_regulator_linked(num, pdata, NULL, 0, features);
 663 }
 664
 665 /*
 666  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 667  * for the PIH, and the next are for the PWR_INT SIH, since
 668  * that's how twl_init_irq() sets things up.
 669  */
 670
 671 static int
 672 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 673                 unsigned long features)
 674 {
 675         struct device   *child;
 676         unsigned sub_chip_id;
 677
 678         if (twl_has_gpio() && pdata->gpio) {
 679                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 680                                 pdata->gpio, sizeof(*pdata->gpio),
 681                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 682                 if (IS_ERR(child))
 683                         return PTR_ERR(child);
 684         }
 685
 686         if (twl_has_keypad() && pdata->keypad) {
 687                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 688                                 pdata->keypad, sizeof(*pdata->keypad),
 689                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 690                 if (IS_ERR(child))
 691                         return PTR_ERR(child);
 692         }
 693
 694         if (twl_has_madc() && pdata->madc) {
 695                 child = add_child(2, "twl4030_madc",
 696                                 pdata->madc, sizeof(*pdata->madc),
 697                                 true, irq_base + MADC_INTR_OFFSET, 0);
 698                 if (IS_ERR(child))
 699                         return PTR_ERR(child);
 700         }
 701
 702         if (twl_has_rtc()) {
 703                 /*
 704                  * REVISIT platform_data here currently might expose the
 705                  * "msecure" line ... but for now we just expect board
 706                  * setup to tell the chip "it's always ok to SET_TIME".
 707                  * Eventually, Linux might become more aware of such
 708                  * HW security concerns, and "least privilege".
 709                  */
 710                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 711                 child = add_child(sub_chip_id, "twl_rtc",
 712                                 NULL, 0,
 713                                 true, irq_base + RTC_INTR_OFFSET, 0);
 714                 if (IS_ERR(child))
 715                         return PTR_ERR(child);
 716         }
 717
 718         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 719
 720                 static struct regulator_consumer_supply usb1v5 = {
 721                         .supply =       "usb1v5",
 722                 };
 723                 static struct regulator_consumer_supply usb1v8 = {
 724                         .supply =       "usb1v8",
 725                 };
 726                 static struct regulator_consumer_supply usb3v1 = {
 727                         .supply =       "usb3v1",
 728                 };
 729
 730         /* First add the regulators so that they can be used by transceiver */
 731                 if (twl_has_regulator()) {
 732                         /* this is a template that gets copied */
 733                         struct regulator_init_data usb_fixed = {
 734                                 .constraints.valid_modes_mask =
 735                                         REGULATOR_MODE_NORMAL
 736                                         | REGULATOR_MODE_STANDBY,
 737                                 .constraints.valid_ops_mask =
 738                                         REGULATOR_CHANGE_MODE
 739                                         | REGULATOR_CHANGE_STATUS,
 740                         };
 741
 742                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 743                                                       &usb_fixed, &usb1v5, 1,
 744                                                       features);
 745                         if (IS_ERR(child))
 746                                 return PTR_ERR(child);
 747
 748                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 749                                                       &usb_fixed, &usb1v8, 1,
 750                                                       features);
 751                         if (IS_ERR(child))
 752                                 return PTR_ERR(child);
 753
 754                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 755                                                       &usb_fixed, &usb3v1, 1,
 756                                                       features);
 757                         if (IS_ERR(child))
 758                                 return PTR_ERR(child);
 759
 760                 }
 761
 762                 child = add_child(0, "twl4030_usb",
 763                                 pdata->usb, sizeof(*pdata->usb),
 764                                 true,
 765                                 /* irq0 = USB_PRES, irq1 = USB */
 766                                 irq_base + USB_PRES_INTR_OFFSET,
 767                                 irq_base + USB_INTR_OFFSET);
 768
 769                 if (IS_ERR(child))
 770                         return PTR_ERR(child);
 771
 772                 /* we need to connect regulators to this transceiver */
 773                 if (twl_has_regulator() && child) {
 774                         usb1v5.dev_name = dev_name(child);
 775                         usb1v8.dev_name = dev_name(child);
 776                         usb3v1.dev_name = dev_name(child);
 777                 }
 778         }
 779         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 780
 781                 static struct regulator_consumer_supply usb3v3;
 782                 int regulator;
 783
 784                 if (twl_has_regulator()) {
 785                         /* this is a template that gets copied */
 786                         struct regulator_init_data usb_fixed = {
 787                                 .constraints.valid_modes_mask =
 788                                         REGULATOR_MODE_NORMAL
 789                                         | REGULATOR_MODE_STANDBY,
 790                                 .constraints.valid_ops_mask =
 791                                         REGULATOR_CHANGE_MODE
 792                                         | REGULATOR_CHANGE_STATUS,
 793                         };
 794
 795                         if (features & TWL6025_SUBCLASS) {
 796                                 usb3v3.supply = "ldousb";
 797                                 regulator = TWL6025_REG_LDOUSB;
 798                         } else {
 799                                 usb3v3.supply = "vusb";
 800                                 regulator = TWL6030_REG_VUSB;
 801                         }
 802                         child = add_regulator_linked(regulator, &usb_fixed,
 803                                                         &usb3v3, 1,
 804                                                         features);
 805                         if (IS_ERR(child))
 806                                 return PTR_ERR(child);
 807                 }
 808
 809                 pdata->usb->features = features;
 810
 811                 child = add_child(0, "twl6030_usb",
 812                         pdata->usb, sizeof(*pdata->usb),
 813                         true,
 814                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 815                         irq_base + USBOTG_INTR_OFFSET,
 816                         irq_base + USB_PRES_INTR_OFFSET);
 817
 818                 if (IS_ERR(child))
 819                         return PTR_ERR(child);
 820                 /* we need to connect regulators to this transceiver */
 821                 if (twl_has_regulator() && child)
 822                         usb3v3.dev_name = dev_name(child);
 823         } else if (twl_has_regulator() && twl_class_is_6030()) {
 824                 if (features & TWL6025_SUBCLASS)
 825                         child = add_regulator(TWL6025_REG_LDOUSB,
 826                                                 pdata->ldousb, features);
 827                 else
 828                         child = add_regulator(TWL6030_REG_VUSB,
 829                                                 pdata->vusb, features);
 830
 831                         if (IS_ERR(child))
 832                                         return PTR_ERR(child);
 833         }
 834
 835         if (twl_has_watchdog() && twl_class_is_4030()) {
 836                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 837                 if (IS_ERR(child))
 838                         return PTR_ERR(child);
 839         }
 840
 841         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 842                 child = add_child(1, "twl4030_pwrbutton",
 843                                 NULL, 0, true, irq_base + 8 + 0, 0);
 844                 if (IS_ERR(child))
 845                         return PTR_ERR(child);
 846         }
 847
 848         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 849                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 850                 child = add_child(sub_chip_id, "twl4030-audio",
 851                                 pdata->audio, sizeof(*pdata->audio),
 852                                 false, 0, 0);
 853                 if (IS_ERR(child))
 854                         return PTR_ERR(child);
 855         }
 856
 857         /* twl4030 regulators */
 858         if (twl_has_regulator() && twl_class_is_4030()) {
 859                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 860                                         features);
 861                 if (IS_ERR(child))
 862                         return PTR_ERR(child);
 863
 864                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 865                                         features);
 866                 if (IS_ERR(child))
 867                         return PTR_ERR(child);
 868
 869                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 870                                         features);
 871                 if (IS_ERR(child))
 872                         return PTR_ERR(child);
 873
 874                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 875                                         features);
 876                 if (IS_ERR(child))
 877                         return PTR_ERR(child);
 878
 879                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 880                                         features);
 881                 if (IS_ERR(child))
 882                         return PTR_ERR(child);
 883
 884                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 885                                         features);
 886                 if (IS_ERR(child))
 887                         return PTR_ERR(child);
 888
 889                 child = add_regulator((features & TWL4030_VAUX2)
 890                                         ? TWL4030_REG_VAUX2_4030
 891                                         : TWL4030_REG_VAUX2,
 892                                 pdata->vaux2, features);
 893                 if (IS_ERR(child))
 894                         return PTR_ERR(child);
 895
 896                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 897                                         features);
 898                 if (IS_ERR(child))
 899                         return PTR_ERR(child);
 900
 901                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 902                                         features);
 903                 if (IS_ERR(child))
 904                         return PTR_ERR(child);
 905
 906                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 907                                         features);
 908                 if (IS_ERR(child))
 909                         return PTR_ERR(child);
 910         }
 911
 912         /* maybe add LDOs that are omitted on cost-reduced parts */
 913         if (twl_has_regulator() && !(features & TPS_SUBSET)
 914           && twl_class_is_4030()) {
 915                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 916                                         features);
 917                 if (IS_ERR(child))
 918                         return PTR_ERR(child);
 919
 920                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 921                                         features);
 922                 if (IS_ERR(child))
 923                         return PTR_ERR(child);
 924
 925                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 926                                         features);
 927                 if (IS_ERR(child))
 928                         return PTR_ERR(child);
 929
 930                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 931                                         features);
 932                 if (IS_ERR(child))
 933                         return PTR_ERR(child);
 934
 935                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 936                                         features);
 937                 if (IS_ERR(child))
 938                         return PTR_ERR(child);
 939
 940                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 941                                         features);
 942                 if (IS_ERR(child))
 943                         return PTR_ERR(child);
 944         }
 945
 946         /* twl6030 regulators */
 947         if (twl_has_regulator() && twl_class_is_6030() &&
 948                         !(features & TWL6025_SUBCLASS)) {
 949                 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
 950                                         features);
 951                 if (IS_ERR(child))
 952                         return PTR_ERR(child);
 953
 954                 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
 955                                         features);
 956                 if (IS_ERR(child))
 957                         return PTR_ERR(child);
 958
 959                 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
 960                                         features);
 961                 if (IS_ERR(child))
 962                         return PTR_ERR(child);
 963
 964                 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8,
 965                                         features);
 966                 if (IS_ERR(child))
 967                         return PTR_ERR(child);
 968
 969                 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1,
 970                                         features);
 971                 if (IS_ERR(child))
 972                         return PTR_ERR(child);
 973
 974                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 975                                         features);
 976                 if (IS_ERR(child))
 977                         return PTR_ERR(child);
 978
 979                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 980                                         features);
 981                 if (IS_ERR(child))
 982                         return PTR_ERR(child);
 983
 984                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 985                                         features);
 986                 if (IS_ERR(child))
 987                         return PTR_ERR(child);
 988
 989                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 990                                         features);
 991                 if (IS_ERR(child))
 992                         return PTR_ERR(child);
 993
 994                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 995                                         features);
 996                 if (IS_ERR(child))
 997                         return PTR_ERR(child);
 998
 999                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
1000                                         features);
1001                 if (IS_ERR(child))
1002                         return PTR_ERR(child);
1003
1004                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
1005                                         features);
1006                 if (IS_ERR(child))
1007                         return PTR_ERR(child);
1008
1009                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
1010                                         features);
1011                 if (IS_ERR(child))
1012                         return PTR_ERR(child);
1013
1014                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
1015                                         features);
1016                 if (IS_ERR(child))
1017                         return PTR_ERR(child);
1018         }
1019
1020         /* 6030 and 6025 share this regulator */
1021         if (twl_has_regulator() && twl_class_is_6030()) {
1022                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
1023                                         features);
1024                 if (IS_ERR(child))
1025                         return PTR_ERR(child);
1026         }
1027
1028         /* twl6025 regulators */
1029         if (twl_has_regulator() && twl_class_is_6030() &&
1030                         (features & TWL6025_SUBCLASS)) {
1031                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1032                                         features);
1033                 if (IS_ERR(child))
1034                         return PTR_ERR(child);
1035
1036                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1037                                         features);
1038                 if (IS_ERR(child))
1039                         return PTR_ERR(child);
1040
1041                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1042                                         features);
1043                 if (IS_ERR(child))
1044                         return PTR_ERR(child);
1045
1046                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1047                                         features);
1048                 if (IS_ERR(child))
1049                         return PTR_ERR(child);
1050
1051                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1052                                         features);
1053                 if (IS_ERR(child))
1054                         return PTR_ERR(child);
1055
1056                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1057                                         features);
1058                 if (IS_ERR(child))
1059                         return PTR_ERR(child);
1060
1061                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1062                                         features);
1063                 if (IS_ERR(child))
1064                         return PTR_ERR(child);
1065
1066                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1067                                         features);
1068                 if (IS_ERR(child))
1069                         return PTR_ERR(child);
1070
1071                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1072                                         features);
1073                 if (IS_ERR(child))
1074                         return PTR_ERR(child);
1075
1076                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1077                                         features);
1078                 if (IS_ERR(child))
1079                         return PTR_ERR(child);
1080
1081                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1082                                         features);
1083                 if (IS_ERR(child))
1084                         return PTR_ERR(child);
1085
1086         }
1087
1088         if (twl_has_bci() && pdata->bci &&
1089                         !(features & (TPS_SUBSET | TWL5031))) {
1090                 child = add_child(3, "twl4030_bci",
1091                                 pdata->bci, sizeof(*pdata->bci), false,
1092                                 /* irq0 = CHG_PRES, irq1 = BCI */
1093                                 irq_base + BCI_PRES_INTR_OFFSET,
1094                                 irq_base + BCI_INTR_OFFSET);
1095                 if (IS_ERR(child))
1096                         return PTR_ERR(child);
1097         }
1098
1099         return 0;
1100 }
1101
1102 /*----------------------------------------------------------------------*/
1103
1104 /*
1105  * These three functions initialize the on-chip clock framework,
1106  * letting it generate the right frequencies for USB, MADC, and
1107  * other purposes.
1108  */
1109 static inline int __init protect_pm_master(void)
1110 {
1111         int e = 0;
1112
1113         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1114                         TWL4030_PM_MASTER_PROTECT_KEY);
1115         return e;
1116 }
1117
1118 static inline int __init unprotect_pm_master(void)
1119 {
1120         int e = 0;
1121
1122         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1123                         TWL4030_PM_MASTER_KEY_CFG1,
1124                         TWL4030_PM_MASTER_PROTECT_KEY);
1125         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1126                         TWL4030_PM_MASTER_KEY_CFG2,
1127                         TWL4030_PM_MASTER_PROTECT_KEY);
1128
1129         return e;
1130 }
1131
1132 static void clocks_init(struct device *dev,
1133                         struct twl4030_clock_init_data *clock)
1134 {
1135         int e = 0;
1136         struct clk *osc;
1137         u32 rate;
1138         u8 ctrl = HFCLK_FREQ_26_MHZ;
1139
1140 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1141         if (cpu_is_omap2430())
1142                 osc = clk_get(dev, "osc_ck");
1143         else
1144                 osc = clk_get(dev, "osc_sys_ck");
1145
1146         if (IS_ERR(osc)) {
1147                 printk(KERN_WARNING "Skipping twl internal clock init and "
1148                                 "using bootloader value (unknown osc rate)\n");
1149                 return;
1150         }
1151
1152         rate = clk_get_rate(osc);
1153         clk_put(osc);
1154
1155 #else
1156         /* REVISIT for non-OMAP systems, pass the clock rate from
1157          * board init code, using platform_data.
1158          */
1159         osc = ERR_PTR(-EIO);
1160
1161         printk(KERN_WARNING "Skipping twl internal clock init and "
1162                "using bootloader value (unknown osc rate)\n");
1163
1164         return;
1165 #endif
1166
1167         switch (rate) {
1168         case 19200000:
1169                 ctrl = HFCLK_FREQ_19p2_MHZ;
1170                 break;
1171         case 26000000:
1172                 ctrl = HFCLK_FREQ_26_MHZ;
1173                 break;
1174         case 38400000:
1175                 ctrl = HFCLK_FREQ_38p4_MHZ;
1176                 break;
1177         }
1178
1179         ctrl |= HIGH_PERF_SQ;
1180         if (clock && clock->ck32k_lowpwr_enable)
1181                 ctrl |= CK32K_LOWPWR_EN;
1182
1183         e |= unprotect_pm_master();
1184         /* effect->MADC+USB ck en */
1185         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1186         e |= protect_pm_master();
1187
1188         if (e < 0)
1189                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1190 }
1191
1192 /*----------------------------------------------------------------------*/
1193
1194
1195 static int twl_remove(struct i2c_client *client)
1196 {
1197         unsigned i, num_slaves;
1198         int status;
1199
1200         if (twl_class_is_4030()) {
1201                 status = twl4030_exit_irq();
1202                 num_slaves = TWL_NUM_SLAVES;
1203         } else {
1204                 status = twl6030_exit_irq();
1205                 num_slaves = TWL_NUM_SLAVES - 1;
1206         }
1207
1208         if (status < 0)
1209                 return status;
1210
1211         for (i = 0; i < num_slaves; i++) {
1212                 struct twl_client       *twl = &twl_modules[i];
1213
1214                 if (twl->client && twl->client != client)
1215                         i2c_unregister_device(twl->client);
1216                 twl_modules[i].client = NULL;
1217         }
1218         inuse = false;
1219         return 0;
1220 }
1221
1222 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1223 static int __devinit
1224 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1225 {
1226         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1227         struct device_node              *node = client->dev.of_node;
1228         int                             irq_base = 0;
1229         int                             status;
1230         unsigned                        i, num_slaves;
1231
1232         if (node && !pdata) {
1233                 /*
1234                  * XXX: Temporary pdata until the information is correctly
1235                  * retrieved by every TWL modules from DT.
1236                  */
1237                 pdata = devm_kzalloc(&client->dev,
1238                                      sizeof(struct twl4030_platform_data),
1239                                      GFP_KERNEL);
1240                 if (!pdata)
1241                         return -ENOMEM;
1242         }
1243
1244         if (!pdata) {
1245                 dev_dbg(&client->dev, "no platform data?\n");
1246                 return -EINVAL;
1247         }
1248
1249         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1250                 dev_dbg(&client->dev, "can't talk I2C?\n");
1251                 return -EIO;
1252         }
1253
1254         if (inuse) {
1255                 dev_dbg(&client->dev, "driver is already in use\n");
1256                 return -EBUSY;
1257         }
1258
1259         if ((id->driver_data) & TWL6030_CLASS) {
1260                 twl_id = TWL6030_CLASS_ID;
1261                 twl_map = &twl6030_map[0];
1262                 num_slaves = TWL_NUM_SLAVES - 1;
1263         } else {
1264                 twl_id = TWL4030_CLASS_ID;
1265                 twl_map = &twl4030_map[0];
1266                 num_slaves = TWL_NUM_SLAVES;
1267         }
1268
1269         for (i = 0; i < num_slaves; i++) {
1270                 struct twl_client *twl = &twl_modules[i];
1271
1272                 twl->address = client->addr + i;
1273                 if (i == 0) {
1274                         twl->client = client;
1275                 } else {
1276                         twl->client = i2c_new_dummy(client->adapter,
1277                                         twl->address);
1278                         if (!twl->client) {
1279                                 dev_err(&client->dev,
1280                                         "can't attach client %d\n", i);
1281                                 status = -ENOMEM;
1282                                 goto fail;
1283                         }
1284                 }
1285                 mutex_init(&twl->xfer_lock);
1286         }
1287
1288         inuse = true;
1289
1290         /* setup clock framework */
1291         clocks_init(&client->dev, pdata->clock);
1292
1293         /* read TWL IDCODE Register */
1294         if (twl_id == TWL4030_CLASS_ID) {
1295                 status = twl_read_idcode_register();
1296                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1297         }
1298
1299         /* load power event scripts */
1300         if (twl_has_power() && pdata->power)
1301                 twl4030_power_init(pdata->power);
1302
1303         /* Maybe init the T2 Interrupt subsystem */
1304         if (client->irq) {
1305                 if (twl_class_is_4030()) {
1306                         twl4030_init_chip_irq(id->name);
1307                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1308                 } else {
1309                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1310                 }
1311
1312                 if (irq_base < 0) {
1313                         status = irq_base;
1314                         goto fail;
1315                 }
1316         }
1317
1318         /*
1319          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1320          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1321          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1322          */
1323         if (twl_class_is_4030()) {
1324                 u8 temp;
1325
1326                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1327                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1328                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1329                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1330         }
1331
1332         status = -ENODEV;
1333         if (node)
1334                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1335         if (status)
1336                 status = add_children(pdata, irq_base, id->driver_data);
1337
1338 fail:
1339         if (status < 0)
1340                 twl_remove(client);
1341
1342         return status;
1343 }
1344
1345 static const struct i2c_device_id twl_ids[] = {
1346         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1347         { "twl5030", 0 },               /* T2 updated */
1348         { "twl5031", TWL5031 },         /* TWL5030 updated */
1349         { "tps65950", 0 },              /* catalog version of twl5030 */
1350         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1351         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1352         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1353                                            and vibrator. Charger in USB module*/
1354         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1355         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1356         { /* end of list */ },
1357 };
1358 MODULE_DEVICE_TABLE(i2c, twl_ids);
1359
1360 /* One Client Driver , 4 Clients */
1361 static struct i2c_driver twl_driver = {
1362         .driver.name    = DRIVER_NAME,
1363         .id_table       = twl_ids,
1364         .probe          = twl_probe,
1365         .remove         = twl_remove,
1366 };
1367
1368 static int __init twl_init(void)
1369 {
1370         return i2c_add_driver(&twl_driver);
1371 }
1372 subsys_initcall(twl_init);
1373
1374 static void __exit twl_exit(void)
1375 {
1376         i2c_del_driver(&twl_driver);
1377 }
1378 module_exit(twl_exit);
1379
1380 MODULE_AUTHOR("Texas Instruments, Inc.");
1381 MODULE_DESCRIPTION("I2C Core interface for TWL");
1382 MODULE_LICENSE("GPL");