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/irqdomain.h>
  42
  43 #include <linux/regulator/machine.h>
  44
  45 #include <linux/i2c.h>
  46 #include <linux/i2c/twl.h>
  47
  48 /*
  49  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  50  * Management and System Companion Device" chips originally designed for
  51  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  52  * often at around 3 Mbit/sec, including for interrupt handling.
  53  *
  54  * This driver core provides genirq support for the interrupts emitted,
  55  * by the various modules, and exports register access primitives.
  56  *
  57  * FIXME this driver currently requires use of the first interrupt line
  58  * (and associated registers).
  59  */
  60
  61 #define DRIVER_NAME                     "twl"
  62
  63 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  64 #define twl_has_keypad()        true
  65 #else
  66 #define twl_has_keypad()        false
  67 #endif
  68
  69 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  70 #define twl_has_gpio()  true
  71 #else
  72 #define twl_has_gpio()  false
  73 #endif
  74
  75 #if defined(CONFIG_REGULATOR_TWL4030) \
  76         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  77 #define twl_has_regulator()     true
  78 #else
  79 #define twl_has_regulator()     false
  80 #endif
  81
  82 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  83 #define twl_has_madc()  true
  84 #else
  85 #define twl_has_madc()  false
  86 #endif
  87
  88 #ifdef CONFIG_TWL4030_POWER
  89 #define twl_has_power()        true
  90 #else
  91 #define twl_has_power()        false
  92 #endif
  93
  94 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  95 #define twl_has_rtc()   true
  96 #else
  97 #define twl_has_rtc()   false
  98 #endif
  99
 100 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 101         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 102 #define twl_has_usb()   true
 103 #else
 104 #define twl_has_usb()   false
 105 #endif
 106
 107 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 108         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 109 #define twl_has_watchdog()        true
 110 #else
 111 #define twl_has_watchdog()        false
 112 #endif
 113
 114 #if defined(CONFIG_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_MODULE) ||\
 115         defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
 116 #define twl_has_codec() true
 117 #else
 118 #define twl_has_codec() false
 119 #endif
 120
 121 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 122 #define twl_has_bci()   true
 123 #else
 124 #define twl_has_bci()   false
 125 #endif
 126
 127 /* Triton Core internal information (BEGIN) */
 128
 129 /* Last - for index max*/
 130 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 131
 132 #define TWL_NUM_SLAVES          4
 133
 134 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 135         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 136 #define twl_has_pwrbutton()     true
 137 #else
 138 #define twl_has_pwrbutton()     false
 139 #endif
 140
 141 #define SUB_CHIP_ID0 0
 142 #define SUB_CHIP_ID1 1
 143 #define SUB_CHIP_ID2 2
 144 #define SUB_CHIP_ID3 3
 145
 146 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 147
 148 #define TWL4030_NR_IRQS    8
 149 #define TWL6030_NR_IRQS    20
 150
 151 /* Base Address defns for twl4030_map[] */
 152
 153 /* subchip/slave 0 - USB ID */
 154 #define TWL4030_BASEADD_USB             0x0000
 155
 156 /* subchip/slave 1 - AUD ID */
 157 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 158 #define TWL4030_BASEADD_GPIO            0x0098
 159 #define TWL4030_BASEADD_INTBR           0x0085
 160 #define TWL4030_BASEADD_PIH             0x0080
 161 #define TWL4030_BASEADD_TEST            0x004C
 162
 163 /* subchip/slave 2 - AUX ID */
 164 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 165 #define TWL4030_BASEADD_LED             0x00EE
 166 #define TWL4030_BASEADD_MADC            0x0000
 167 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 168 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 169 #define TWL4030_BASEADD_PWM0            0x00F8
 170 #define TWL4030_BASEADD_PWM1            0x00FB
 171 #define TWL4030_BASEADD_PWMA            0x00EF
 172 #define TWL4030_BASEADD_PWMB            0x00F1
 173 #define TWL4030_BASEADD_KEYPAD          0x00D2
 174
 175 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 176 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 177                                                   one */
 178
 179 /* subchip/slave 3 - POWER ID */
 180 #define TWL4030_BASEADD_BACKUP          0x0014
 181 #define TWL4030_BASEADD_INT             0x002E
 182 #define TWL4030_BASEADD_PM_MASTER       0x0036
 183 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 184 #define TWL4030_BASEADD_RTC             0x001C
 185 #define TWL4030_BASEADD_SECURED_REG     0x0000
 186
 187 /* Triton Core internal information (END) */
 188
 189
 190 /* subchip/slave 0 0x48 - POWER */
 191 #define TWL6030_BASEADD_RTC             0x0000
 192 #define TWL6030_BASEADD_MEM             0x0017
 193 #define TWL6030_BASEADD_PM_MASTER       0x001F
 194 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 195 #define TWL6030_BASEADD_PM_MISC         0x00E2
 196 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 197
 198 /* subchip/slave 1 0x49 - FEATURE */
 199 #define TWL6030_BASEADD_USB             0x0000
 200 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 201 #define TWL6030_BASEADD_AUX             0x0090
 202 #define TWL6030_BASEADD_PWM             0x00BA
 203 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 204 #define TWL6030_BASEADD_PIH             0x00D0
 205 #define TWL6030_BASEADD_CHARGER         0x00E0
 206 #define TWL6025_BASEADD_CHARGER         0x00DA
 207
 208 /* subchip/slave 2 0x4A - DFT */
 209 #define TWL6030_BASEADD_DIEID           0x00C0
 210
 211 /* subchip/slave 3 0x4B - AUDIO */
 212 #define TWL6030_BASEADD_AUDIO           0x0000
 213 #define TWL6030_BASEADD_RSV             0x0000
 214 #define TWL6030_BASEADD_ZERO            0x0000
 215
 216 /* Few power values */
 217 #define R_CFG_BOOT                      0x05
 218
 219 /* some fields in R_CFG_BOOT */
 220 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 221 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 222 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 223 #define HIGH_PERF_SQ                    (1 << 3)
 224 #define CK32K_LOWPWR_EN                 (1 << 7)
 225
 226
 227 /* chip-specific feature flags, for i2c_device_id.driver_data */
 228 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 229 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 230 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 231 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 232
 233 /*----------------------------------------------------------------------*/
 234
 235 /* is driver active, bound to a chip? */
 236 static bool inuse;
 237
 238 /* TWL IDCODE Register value */
 239 static u32 twl_idcode;
 240
 241 static unsigned int twl_id;
 242 unsigned int twl_rev(void)
 243 {
 244         return twl_id;
 245 }
 246 EXPORT_SYMBOL(twl_rev);
 247
 248 /* Structure for each TWL4030/TWL6030 Slave */
 249 struct twl_client {
 250         struct i2c_client *client;
 251         u8 address;
 252
 253         /* max numb of i2c_msg required is for read =2 */
 254         struct i2c_msg xfer_msg[2];
 255
 256         /* To lock access to xfer_msg */
 257         struct mutex xfer_lock;
 258 };
 259
 260 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 261
 262 #ifdef CONFIG_IRQ_DOMAIN
 263 static struct irq_domain domain;
 264 #endif
 265
 266 /* mapping the module id to slave id and base address */
 267 struct twl_mapping {
 268         unsigned char sid;      /* Slave ID */
 269         unsigned char base;     /* base address */
 270 };
 271 static struct twl_mapping *twl_map;
 272
 273 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 274         /*
 275          * NOTE:  don't change this table without updating the
 276          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 277          * so they continue to match the order in this table.
 278          */
 279
 280         { 0, TWL4030_BASEADD_USB },
 281
 282         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 283         { 1, TWL4030_BASEADD_GPIO },
 284         { 1, TWL4030_BASEADD_INTBR },
 285         { 1, TWL4030_BASEADD_PIH },
 286         { 1, TWL4030_BASEADD_TEST },
 287
 288         { 2, TWL4030_BASEADD_KEYPAD },
 289         { 2, TWL4030_BASEADD_MADC },
 290         { 2, TWL4030_BASEADD_INTERRUPTS },
 291         { 2, TWL4030_BASEADD_LED },
 292         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 293         { 2, TWL4030_BASEADD_PRECHARGE },
 294         { 2, TWL4030_BASEADD_PWM0 },
 295         { 2, TWL4030_BASEADD_PWM1 },
 296         { 2, TWL4030_BASEADD_PWMA },
 297         { 2, TWL4030_BASEADD_PWMB },
 298         { 2, TWL5031_BASEADD_ACCESSORY },
 299         { 2, TWL5031_BASEADD_INTERRUPTS },
 300
 301         { 3, TWL4030_BASEADD_BACKUP },
 302         { 3, TWL4030_BASEADD_INT },
 303         { 3, TWL4030_BASEADD_PM_MASTER },
 304         { 3, TWL4030_BASEADD_PM_RECEIVER },
 305         { 3, TWL4030_BASEADD_RTC },
 306         { 3, TWL4030_BASEADD_SECURED_REG },
 307 };
 308
 309 static struct twl_mapping twl6030_map[] = {
 310         /*
 311          * NOTE:  don't change this table without updating the
 312          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 313          * so they continue to match the order in this table.
 314          */
 315         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 316         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 317         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 318         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 319         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 320
 321         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 322         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 323         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 324         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 325         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 326
 327         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 328         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 329         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 330         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 331         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 332
 333         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 334         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 335         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 336         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 337         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 338         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 339         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 340
 341         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 342         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 343         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 344 };
 345
 346 /*----------------------------------------------------------------------*/
 347
 348 /* Exported Functions */
 349
 350 /**
 351  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 352  * @mod_no: module number
 353  * @value: an array of num_bytes+1 containing data to write
 354  * @reg: register address (just offset will do)
 355  * @num_bytes: number of bytes to transfer
 356  *
 357  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 358  * valid data starts at Offset 1.
 359  *
 360  * Returns the result of operation - 0 is success
 361  */
 362 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 363 {
 364         int ret;
 365         int sid;
 366         struct twl_client *twl;
 367         struct i2c_msg *msg;
 368
 369         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 370                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 371                 return -EPERM;
 372         }
 373         if (unlikely(!inuse)) {
 374                 pr_err("%s: not initialized\n", DRIVER_NAME);
 375                 return -EPERM;
 376         }
 377         sid = twl_map[mod_no].sid;
 378         twl = &twl_modules[sid];
 379
 380         mutex_lock(&twl->xfer_lock);
 381         /*
 382          * [MSG1]: fill the register address data
 383          * fill the data Tx buffer
 384          */
 385         msg = &twl->xfer_msg[0];
 386         msg->addr = twl->address;
 387         msg->len = num_bytes + 1;
 388         msg->flags = 0;
 389         msg->buf = value;
 390         /* over write the first byte of buffer with the register address */
 391         *value = twl_map[mod_no].base + reg;
 392         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 393         mutex_unlock(&twl->xfer_lock);
 394
 395         /* i2c_transfer returns number of messages transferred */
 396         if (ret != 1) {
 397                 pr_err("%s: i2c_write failed to transfer all messages\n",
 398                         DRIVER_NAME);
 399                 if (ret < 0)
 400                         return ret;
 401                 else
 402                         return -EIO;
 403         } else {
 404                 return 0;
 405         }
 406 }
 407 EXPORT_SYMBOL(twl_i2c_write);
 408
 409 /**
 410  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 411  * @mod_no: module number
 412  * @value: an array of num_bytes containing data to be read
 413  * @reg: register address (just offset will do)
 414  * @num_bytes: number of bytes to transfer
 415  *
 416  * Returns result of operation - num_bytes is success else failure.
 417  */
 418 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 419 {
 420         int ret;
 421         u8 val;
 422         int sid;
 423         struct twl_client *twl;
 424         struct i2c_msg *msg;
 425
 426         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 427                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 428                 return -EPERM;
 429         }
 430         if (unlikely(!inuse)) {
 431                 pr_err("%s: not initialized\n", DRIVER_NAME);
 432                 return -EPERM;
 433         }
 434         sid = twl_map[mod_no].sid;
 435         twl = &twl_modules[sid];
 436
 437         mutex_lock(&twl->xfer_lock);
 438         /* [MSG1] fill the register address data */
 439         msg = &twl->xfer_msg[0];
 440         msg->addr = twl->address;
 441         msg->len = 1;
 442         msg->flags = 0; /* Read the register value */
 443         val = twl_map[mod_no].base + reg;
 444         msg->buf = &val;
 445         /* [MSG2] fill the data rx buffer */
 446         msg = &twl->xfer_msg[1];
 447         msg->addr = twl->address;
 448         msg->flags = I2C_M_RD;  /* Read the register value */
 449         msg->len = num_bytes;   /* only n bytes */
 450         msg->buf = value;
 451         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 452         mutex_unlock(&twl->xfer_lock);
 453
 454         /* i2c_transfer returns number of messages transferred */
 455         if (ret != 2) {
 456                 pr_err("%s: i2c_read failed to transfer all messages\n",
 457                         DRIVER_NAME);
 458                 if (ret < 0)
 459                         return ret;
 460                 else
 461                         return -EIO;
 462         } else {
 463                 return 0;
 464         }
 465 }
 466 EXPORT_SYMBOL(twl_i2c_read);
 467
 468 /**
 469  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 470  * @mod_no: module number
 471  * @value: the value to be written 8 bit
 472  * @reg: register address (just offset will do)
 473  *
 474  * Returns result of operation - 0 is success
 475  */
 476 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 477 {
 478
 479         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 480         u8 temp_buffer[2] = { 0 };
 481         /* offset 1 contains the data */
 482         temp_buffer[1] = value;
 483         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 484 }
 485 EXPORT_SYMBOL(twl_i2c_write_u8);
 486
 487 /**
 488  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 489  * @mod_no: module number
 490  * @value: the value read 8 bit
 491  * @reg: register address (just offset will do)
 492  *
 493  * Returns result of operation - 0 is success
 494  */
 495 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 496 {
 497         return twl_i2c_read(mod_no, value, reg, 1);
 498 }
 499 EXPORT_SYMBOL(twl_i2c_read_u8);
 500
 501 /*----------------------------------------------------------------------*/
 502
 503 /**
 504  * twl_read_idcode_register - API to read the IDCODE register.
 505  *
 506  * Unlocks the IDCODE register and read the 32 bit value.
 507  */
 508 static int twl_read_idcode_register(void)
 509 {
 510         int err;
 511
 512         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 513                                                 REG_UNLOCK_TEST_REG);
 514         if (err) {
 515                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 516                 goto fail;
 517         }
 518
 519         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 520                                                 REG_IDCODE_7_0, 4);
 521         if (err) {
 522                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 523                 goto fail;
 524         }
 525
 526         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 527         if (err)
 528                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 529 fail:
 530         return err;
 531 }
 532
 533 /**
 534  * twl_get_type - API to get TWL Si type.
 535  *
 536  * Api to get the TWL Si type from IDCODE value.
 537  */
 538 int twl_get_type(void)
 539 {
 540         return TWL_SIL_TYPE(twl_idcode);
 541 }
 542 EXPORT_SYMBOL_GPL(twl_get_type);
 543
 544 /**
 545  * twl_get_version - API to get TWL Si version.
 546  *
 547  * Api to get the TWL Si version from IDCODE value.
 548  */
 549 int twl_get_version(void)
 550 {
 551         return TWL_SIL_REV(twl_idcode);
 552 }
 553 EXPORT_SYMBOL_GPL(twl_get_version);
 554
 555 static struct device *
 556 add_numbered_child(unsigned chip, const char *name, int num,
 557                 void *pdata, unsigned pdata_len,
 558                 bool can_wakeup, int irq0, int irq1)
 559 {
 560         struct platform_device  *pdev;
 561         struct twl_client       *twl = &twl_modules[chip];
 562         int                     status;
 563
 564         pdev = platform_device_alloc(name, num);
 565         if (!pdev) {
 566                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 567                 status = -ENOMEM;
 568                 goto err;
 569         }
 570
 571         device_init_wakeup(&pdev->dev, can_wakeup);
 572         pdev->dev.parent = &twl->client->dev;
 573
 574         if (pdata) {
 575                 status = platform_device_add_data(pdev, pdata, pdata_len);
 576                 if (status < 0) {
 577                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 578                         goto err;
 579                 }
 580         }
 581
 582         if (irq0) {
 583                 struct resource r[2] = {
 584                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 585                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 586                 };
 587
 588                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 589                 if (status < 0) {
 590                         dev_dbg(&pdev->dev, "can't add irqs\n");
 591                         goto err;
 592                 }
 593         }
 594
 595         status = platform_device_add(pdev);
 596
 597 err:
 598         if (status < 0) {
 599                 platform_device_put(pdev);
 600                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 601                 return ERR_PTR(status);
 602         }
 603         return &pdev->dev;
 604 }
 605
 606 static inline struct device *add_child(unsigned chip, const char *name,
 607                 void *pdata, unsigned pdata_len,
 608                 bool can_wakeup, int irq0, int irq1)
 609 {
 610         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 611                 can_wakeup, irq0, irq1);
 612 }
 613
 614 static struct device *
 615 add_regulator_linked(int num, struct regulator_init_data *pdata,
 616                 struct regulator_consumer_supply *consumers,
 617                 unsigned num_consumers, unsigned long features)
 618 {
 619         unsigned sub_chip_id;
 620         /* regulator framework demands init_data ... */
 621         if (!pdata)
 622                 return NULL;
 623
 624         if (consumers) {
 625                 pdata->consumer_supplies = consumers;
 626                 pdata->num_consumer_supplies = num_consumers;
 627         }
 628
 629         pdata->driver_data = (void *)features;
 630
 631         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 632         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 633         return add_numbered_child(sub_chip_id, "twl_reg", num,
 634                 pdata, sizeof(*pdata), false, 0, 0);
 635 }
 636
 637 static struct device *
 638 add_regulator(int num, struct regulator_init_data *pdata,
 639                 unsigned long features)
 640 {
 641         return add_regulator_linked(num, pdata, NULL, 0, features);
 642 }
 643
 644 /*
 645  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 646  * for the PIH, and the next are for the PWR_INT SIH, since
 647  * that's how twl_init_irq() sets things up.
 648  */
 649
 650 static int
 651 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 652                 unsigned long features)
 653 {
 654         struct device   *child;
 655         unsigned sub_chip_id;
 656
 657         if (twl_has_gpio() && pdata->gpio) {
 658                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 659                                 pdata->gpio, sizeof(*pdata->gpio),
 660                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 661                 if (IS_ERR(child))
 662                         return PTR_ERR(child);
 663         }
 664
 665         if (twl_has_keypad() && pdata->keypad) {
 666                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 667                                 pdata->keypad, sizeof(*pdata->keypad),
 668                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 669                 if (IS_ERR(child))
 670                         return PTR_ERR(child);
 671         }
 672
 673         if (twl_has_madc() && pdata->madc) {
 674                 child = add_child(2, "twl4030_madc",
 675                                 pdata->madc, sizeof(*pdata->madc),
 676                                 true, irq_base + MADC_INTR_OFFSET, 0);
 677                 if (IS_ERR(child))
 678                         return PTR_ERR(child);
 679         }
 680
 681         if (twl_has_rtc()) {
 682                 /*
 683                  * REVISIT platform_data here currently might expose the
 684                  * "msecure" line ... but for now we just expect board
 685                  * setup to tell the chip "it's always ok to SET_TIME".
 686                  * Eventually, Linux might become more aware of such
 687                  * HW security concerns, and "least privilege".
 688                  */
 689                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 690                 child = add_child(sub_chip_id, "twl_rtc",
 691                                 NULL, 0,
 692                                 true, irq_base + RTC_INTR_OFFSET, 0);
 693                 if (IS_ERR(child))
 694                         return PTR_ERR(child);
 695         }
 696
 697         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 698
 699                 static struct regulator_consumer_supply usb1v5 = {
 700                         .supply =       "usb1v5",
 701                 };
 702                 static struct regulator_consumer_supply usb1v8 = {
 703                         .supply =       "usb1v8",
 704                 };
 705                 static struct regulator_consumer_supply usb3v1 = {
 706                         .supply =       "usb3v1",
 707                 };
 708
 709         /* First add the regulators so that they can be used by transceiver */
 710                 if (twl_has_regulator()) {
 711                         /* this is a template that gets copied */
 712                         struct regulator_init_data usb_fixed = {
 713                                 .constraints.valid_modes_mask =
 714                                         REGULATOR_MODE_NORMAL
 715                                         | REGULATOR_MODE_STANDBY,
 716                                 .constraints.valid_ops_mask =
 717                                         REGULATOR_CHANGE_MODE
 718                                         | REGULATOR_CHANGE_STATUS,
 719                         };
 720
 721                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 722                                                       &usb_fixed, &usb1v5, 1,
 723                                                       features);
 724                         if (IS_ERR(child))
 725                                 return PTR_ERR(child);
 726
 727                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 728                                                       &usb_fixed, &usb1v8, 1,
 729                                                       features);
 730                         if (IS_ERR(child))
 731                                 return PTR_ERR(child);
 732
 733                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 734                                                       &usb_fixed, &usb3v1, 1,
 735                                                       features);
 736                         if (IS_ERR(child))
 737                                 return PTR_ERR(child);
 738
 739                 }
 740
 741                 child = add_child(0, "twl4030_usb",
 742                                 pdata->usb, sizeof(*pdata->usb),
 743                                 true,
 744                                 /* irq0 = USB_PRES, irq1 = USB */
 745                                 irq_base + USB_PRES_INTR_OFFSET,
 746                                 irq_base + USB_INTR_OFFSET);
 747
 748                 if (IS_ERR(child))
 749                         return PTR_ERR(child);
 750
 751                 /* we need to connect regulators to this transceiver */
 752                 if (twl_has_regulator() && child) {
 753                         usb1v5.dev_name = dev_name(child);
 754                         usb1v8.dev_name = dev_name(child);
 755                         usb3v1.dev_name = dev_name(child);
 756                 }
 757         }
 758         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 759
 760                 static struct regulator_consumer_supply usb3v3;
 761                 int regulator;
 762
 763                 if (twl_has_regulator()) {
 764                         /* this is a template that gets copied */
 765                         struct regulator_init_data usb_fixed = {
 766                                 .constraints.valid_modes_mask =
 767                                         REGULATOR_MODE_NORMAL
 768                                         | REGULATOR_MODE_STANDBY,
 769                                 .constraints.valid_ops_mask =
 770                                         REGULATOR_CHANGE_MODE
 771                                         | REGULATOR_CHANGE_STATUS,
 772                         };
 773
 774                         if (features & TWL6025_SUBCLASS) {
 775                                 usb3v3.supply = "ldousb";
 776                                 regulator = TWL6025_REG_LDOUSB;
 777                         } else {
 778                                 usb3v3.supply = "vusb";
 779                                 regulator = TWL6030_REG_VUSB;
 780                         }
 781                         child = add_regulator_linked(regulator, &usb_fixed,
 782                                                         &usb3v3, 1,
 783                                                         features);
 784                         if (IS_ERR(child))
 785                                 return PTR_ERR(child);
 786                 }
 787
 788                 pdata->usb->features = features;
 789
 790                 child = add_child(0, "twl6030_usb",
 791                         pdata->usb, sizeof(*pdata->usb),
 792                         true,
 793                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 794                         irq_base + USBOTG_INTR_OFFSET,
 795                         irq_base + USB_PRES_INTR_OFFSET);
 796
 797                 if (IS_ERR(child))
 798                         return PTR_ERR(child);
 799                 /* we need to connect regulators to this transceiver */
 800                 if (twl_has_regulator() && child)
 801                         usb3v3.dev_name = dev_name(child);
 802         } else if (twl_has_regulator() && twl_class_is_6030()) {
 803                 if (features & TWL6025_SUBCLASS)
 804                         child = add_regulator(TWL6025_REG_LDOUSB,
 805                                                 pdata->ldousb, features);
 806                 else
 807                         child = add_regulator(TWL6030_REG_VUSB,
 808                                                 pdata->vusb, features);
 809
 810                         if (IS_ERR(child))
 811                                         return PTR_ERR(child);
 812         }
 813
 814         if (twl_has_watchdog() && twl_class_is_4030()) {
 815                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 816                 if (IS_ERR(child))
 817                         return PTR_ERR(child);
 818         }
 819
 820         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 821                 child = add_child(1, "twl4030_pwrbutton",
 822                                 NULL, 0, true, irq_base + 8 + 0, 0);
 823                 if (IS_ERR(child))
 824                         return PTR_ERR(child);
 825         }
 826
 827         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 828                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 829                 child = add_child(sub_chip_id, "twl4030-audio",
 830                                 pdata->audio, sizeof(*pdata->audio),
 831                                 false, 0, 0);
 832                 if (IS_ERR(child))
 833                         return PTR_ERR(child);
 834         }
 835
 836         if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
 837                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 838                 child = add_child(sub_chip_id, "twl6040",
 839                                 pdata->audio, sizeof(*pdata->audio),
 840                                 false, 0, 0);
 841                 if (IS_ERR(child))
 842                         return PTR_ERR(child);
 843         }
 844
 845         /* twl4030 regulators */
 846         if (twl_has_regulator() && twl_class_is_4030()) {
 847                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 848                                         features);
 849                 if (IS_ERR(child))
 850                         return PTR_ERR(child);
 851
 852                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 853                                         features);
 854                 if (IS_ERR(child))
 855                         return PTR_ERR(child);
 856
 857                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 858                                         features);
 859                 if (IS_ERR(child))
 860                         return PTR_ERR(child);
 861
 862                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 863                                         features);
 864                 if (IS_ERR(child))
 865                         return PTR_ERR(child);
 866
 867                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 868                                         features);
 869                 if (IS_ERR(child))
 870                         return PTR_ERR(child);
 871
 872                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 873                                         features);
 874                 if (IS_ERR(child))
 875                         return PTR_ERR(child);
 876
 877                 child = add_regulator((features & TWL4030_VAUX2)
 878                                         ? TWL4030_REG_VAUX2_4030
 879                                         : TWL4030_REG_VAUX2,
 880                                 pdata->vaux2, features);
 881                 if (IS_ERR(child))
 882                         return PTR_ERR(child);
 883
 884                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 885                                         features);
 886                 if (IS_ERR(child))
 887                         return PTR_ERR(child);
 888
 889                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 890                                         features);
 891                 if (IS_ERR(child))
 892                         return PTR_ERR(child);
 893
 894                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 895                                         features);
 896                 if (IS_ERR(child))
 897                         return PTR_ERR(child);
 898         }
 899
 900         /* maybe add LDOs that are omitted on cost-reduced parts */
 901         if (twl_has_regulator() && !(features & TPS_SUBSET)
 902           && twl_class_is_4030()) {
 903                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 904                                         features);
 905                 if (IS_ERR(child))
 906                         return PTR_ERR(child);
 907
 908                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 909                                         features);
 910                 if (IS_ERR(child))
 911                         return PTR_ERR(child);
 912
 913                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 914                                         features);
 915                 if (IS_ERR(child))
 916                         return PTR_ERR(child);
 917
 918                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 919                                         features);
 920                 if (IS_ERR(child))
 921                         return PTR_ERR(child);
 922
 923                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 924                                         features);
 925                 if (IS_ERR(child))
 926                         return PTR_ERR(child);
 927
 928                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 929                                         features);
 930                 if (IS_ERR(child))
 931                         return PTR_ERR(child);
 932         }
 933
 934         /* twl6030 regulators */
 935         if (twl_has_regulator() && twl_class_is_6030() &&
 936                         !(features & TWL6025_SUBCLASS)) {
 937                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 938                                         features);
 939                 if (IS_ERR(child))
 940                         return PTR_ERR(child);
 941
 942                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 943                                         features);
 944                 if (IS_ERR(child))
 945                         return PTR_ERR(child);
 946
 947                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 948                                         features);
 949                 if (IS_ERR(child))
 950                         return PTR_ERR(child);
 951
 952                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 953                                         features);
 954                 if (IS_ERR(child))
 955                         return PTR_ERR(child);
 956
 957                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 958                                         features);
 959                 if (IS_ERR(child))
 960                         return PTR_ERR(child);
 961
 962                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 963                                         features);
 964                 if (IS_ERR(child))
 965                         return PTR_ERR(child);
 966
 967                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
 968                                         features);
 969                 if (IS_ERR(child))
 970                         return PTR_ERR(child);
 971
 972                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
 973                                         features);
 974                 if (IS_ERR(child))
 975                         return PTR_ERR(child);
 976
 977                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
 978                                         features);
 979                 if (IS_ERR(child))
 980                         return PTR_ERR(child);
 981         }
 982
 983         /* 6030 and 6025 share this regulator */
 984         if (twl_has_regulator() && twl_class_is_6030()) {
 985                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
 986                                         features);
 987                 if (IS_ERR(child))
 988                         return PTR_ERR(child);
 989         }
 990
 991         /* twl6025 regulators */
 992         if (twl_has_regulator() && twl_class_is_6030() &&
 993                         (features & TWL6025_SUBCLASS)) {
 994                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
 995                                         features);
 996                 if (IS_ERR(child))
 997                         return PTR_ERR(child);
 998
 999                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1000                                         features);
1001                 if (IS_ERR(child))
1002                         return PTR_ERR(child);
1003
1004                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1005                                         features);
1006                 if (IS_ERR(child))
1007                         return PTR_ERR(child);
1008
1009                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1010                                         features);
1011                 if (IS_ERR(child))
1012                         return PTR_ERR(child);
1013
1014                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1015                                         features);
1016                 if (IS_ERR(child))
1017                         return PTR_ERR(child);
1018
1019                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1020                                         features);
1021                 if (IS_ERR(child))
1022                         return PTR_ERR(child);
1023
1024                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1025                                         features);
1026                 if (IS_ERR(child))
1027                         return PTR_ERR(child);
1028
1029                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1030                                         features);
1031                 if (IS_ERR(child))
1032                         return PTR_ERR(child);
1033
1034                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1035                                         features);
1036                 if (IS_ERR(child))
1037                         return PTR_ERR(child);
1038
1039                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1040                                         features);
1041                 if (IS_ERR(child))
1042                         return PTR_ERR(child);
1043
1044                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1045                                         features);
1046                 if (IS_ERR(child))
1047                         return PTR_ERR(child);
1048
1049         }
1050
1051         if (twl_has_bci() && pdata->bci &&
1052                         !(features & (TPS_SUBSET | TWL5031))) {
1053                 child = add_child(3, "twl4030_bci",
1054                                 pdata->bci, sizeof(*pdata->bci), false,
1055                                 /* irq0 = CHG_PRES, irq1 = BCI */
1056                                 irq_base + BCI_PRES_INTR_OFFSET,
1057                                 irq_base + BCI_INTR_OFFSET);
1058                 if (IS_ERR(child))
1059                         return PTR_ERR(child);
1060         }
1061
1062         return 0;
1063 }
1064
1065 /*----------------------------------------------------------------------*/
1066
1067 /*
1068  * These three functions initialize the on-chip clock framework,
1069  * letting it generate the right frequencies for USB, MADC, and
1070  * other purposes.
1071  */
1072 static inline int __init protect_pm_master(void)
1073 {
1074         int e = 0;
1075
1076         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1077                         TWL4030_PM_MASTER_PROTECT_KEY);
1078         return e;
1079 }
1080
1081 static inline int __init unprotect_pm_master(void)
1082 {
1083         int e = 0;
1084
1085         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1086                         TWL4030_PM_MASTER_KEY_CFG1,
1087                         TWL4030_PM_MASTER_PROTECT_KEY);
1088         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1089                         TWL4030_PM_MASTER_KEY_CFG2,
1090                         TWL4030_PM_MASTER_PROTECT_KEY);
1091
1092         return e;
1093 }
1094
1095 static void clocks_init(struct device *dev,
1096                         struct twl4030_clock_init_data *clock)
1097 {
1098         int e = 0;
1099         struct clk *osc;
1100         u32 rate;
1101         u8 ctrl = HFCLK_FREQ_26_MHZ;
1102
1103 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1104         if (cpu_is_omap2430())
1105                 osc = clk_get(dev, "osc_ck");
1106         else
1107                 osc = clk_get(dev, "osc_sys_ck");
1108
1109         if (IS_ERR(osc)) {
1110                 printk(KERN_WARNING "Skipping twl internal clock init and "
1111                                 "using bootloader value (unknown osc rate)\n");
1112                 return;
1113         }
1114
1115         rate = clk_get_rate(osc);
1116         clk_put(osc);
1117
1118 #else
1119         /* REVISIT for non-OMAP systems, pass the clock rate from
1120          * board init code, using platform_data.
1121          */
1122         osc = ERR_PTR(-EIO);
1123
1124         printk(KERN_WARNING "Skipping twl internal clock init and "
1125                "using bootloader value (unknown osc rate)\n");
1126
1127         return;
1128 #endif
1129
1130         switch (rate) {
1131         case 19200000:
1132                 ctrl = HFCLK_FREQ_19p2_MHZ;
1133                 break;
1134         case 26000000:
1135                 ctrl = HFCLK_FREQ_26_MHZ;
1136                 break;
1137         case 38400000:
1138                 ctrl = HFCLK_FREQ_38p4_MHZ;
1139                 break;
1140         }
1141
1142         ctrl |= HIGH_PERF_SQ;
1143         if (clock && clock->ck32k_lowpwr_enable)
1144                 ctrl |= CK32K_LOWPWR_EN;
1145
1146         e |= unprotect_pm_master();
1147         /* effect->MADC+USB ck en */
1148         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1149         e |= protect_pm_master();
1150
1151         if (e < 0)
1152                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1153 }
1154
1155 /*----------------------------------------------------------------------*/
1156
1157 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1158 int twl4030_exit_irq(void);
1159 int twl4030_init_chip_irq(const char *chip);
1160 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1161 int twl6030_exit_irq(void);
1162
1163 static int twl_remove(struct i2c_client *client)
1164 {
1165         unsigned i;
1166         int status;
1167
1168         if (twl_class_is_4030())
1169                 status = twl4030_exit_irq();
1170         else
1171                 status = twl6030_exit_irq();
1172
1173         if (status < 0)
1174                 return status;
1175
1176         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1177                 struct twl_client       *twl = &twl_modules[i];
1178
1179                 if (twl->client && twl->client != client)
1180                         i2c_unregister_device(twl->client);
1181                 twl_modules[i].client = NULL;
1182         }
1183         inuse = false;
1184         return 0;
1185 }
1186
1187 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
1188 static int __devinit
1189 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1190 {
1191         int                             irq_base;
1192         int                             irq_end;
1193         int                             status;
1194         unsigned                        i;
1195         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1196         struct device_node              *node = client->dev.of_node;
1197         u8 temp;
1198         int ret = 0;
1199         int nr_irqs = TWL4030_NR_IRQS;
1200
1201         if ((id->driver_data) & TWL6030_CLASS)
1202                 nr_irqs = TWL6030_NR_IRQS;
1203
1204         if (node && !pdata) {
1205                 /*
1206                  * XXX: Temporary pdata until the information is correctly
1207                  * retrieved by every TWL modules from DT.
1208                  */
1209                 pdata = devm_kzalloc(&client->dev,
1210                                      sizeof(struct twl4030_platform_data),
1211                                      GFP_KERNEL);
1212                 if (!pdata)
1213                         return -ENOMEM;
1214         }
1215
1216         if (!pdata) {
1217                 dev_dbg(&client->dev, "no platform data?\n");
1218                 return -EINVAL;
1219         }
1220
1221         status = irq_alloc_descs(-1, 0, nr_irqs, 0);
1222         if (IS_ERR_VALUE(status)) {
1223                 dev_err(&client->dev, "Fail to allocate IRQ descs\n");
1224                 return status;
1225         }
1226
1227         irq_base = status;
1228         irq_end = irq_base + nr_irqs;
1229         irq_domain_add_legacy(node, nr_irqs, irq_base, 0,
1230                               &irq_domain_simple_ops, NULL);
1231
1232         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1233                 dev_dbg(&client->dev, "can't talk I2C?\n");
1234                 return -EIO;
1235         }
1236
1237         if (inuse) {
1238                 dev_dbg(&client->dev, "driver is already in use\n");
1239                 return -EBUSY;
1240         }
1241
1242         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1243                 struct twl_client       *twl = &twl_modules[i];
1244
1245                 twl->address = client->addr + i;
1246                 if (i == 0)
1247                         twl->client = client;
1248                 else {
1249                         twl->client = i2c_new_dummy(client->adapter,
1250                                         twl->address);
1251                         if (!twl->client) {
1252                                 dev_err(&client->dev,
1253                                         "can't attach client %d\n", i);
1254                                 status = -ENOMEM;
1255                                 goto fail;
1256                         }
1257                 }
1258                 mutex_init(&twl->xfer_lock);
1259         }
1260         inuse = true;
1261         if ((id->driver_data) & TWL6030_CLASS) {
1262                 twl_id = TWL6030_CLASS_ID;
1263                 twl_map = &twl6030_map[0];
1264         } else {
1265                 twl_id = TWL4030_CLASS_ID;
1266                 twl_map = &twl4030_map[0];
1267         }
1268
1269         /* setup clock framework */
1270         clocks_init(&client->dev, pdata->clock);
1271
1272         /* read TWL IDCODE Register */
1273         if (twl_id == TWL4030_CLASS_ID) {
1274                 ret = twl_read_idcode_register();
1275                 WARN(ret < 0, "Error: reading twl_idcode register value\n");
1276         }
1277
1278         /* load power event scripts */
1279         if (twl_has_power() && pdata->power)
1280                 twl4030_power_init(pdata->power);
1281
1282         /* Maybe init the T2 Interrupt subsystem */
1283         if (client->irq) {
1284                 if (twl_class_is_4030()) {
1285                         twl4030_init_chip_irq(id->name);
1286                         status = twl4030_init_irq(client->irq, irq_base,
1287                         irq_end);
1288                 } else {
1289                         status = twl6030_init_irq(client->irq, irq_base,
1290                         irq_end);
1291                 }
1292
1293                 if (status < 0)
1294                         goto fail;
1295         }
1296
1297         /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1298          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1299          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1300          */
1301
1302         if (twl_class_is_4030()) {
1303                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1304                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1305                 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1306                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1307         }
1308
1309         if (node)
1310                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1311         if (status)
1312                 status = add_children(pdata, irq_base, id->driver_data);
1313
1314 fail:
1315         if (status < 0)
1316                 twl_remove(client);
1317         return status;
1318 }
1319
1320 static const struct i2c_device_id twl_ids[] = {
1321         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1322         { "twl5030", 0 },               /* T2 updated */
1323         { "twl5031", TWL5031 },         /* TWL5030 updated */
1324         { "tps65950", 0 },              /* catalog version of twl5030 */
1325         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1326         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1327         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1328                                            and vibrator. Charger in USB module*/
1329         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1330         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1331         { /* end of list */ },
1332 };
1333 MODULE_DEVICE_TABLE(i2c, twl_ids);
1334
1335 /* One Client Driver , 4 Clients */
1336 static struct i2c_driver twl_driver = {
1337         .driver.name    = DRIVER_NAME,
1338         .id_table       = twl_ids,
1339         .probe          = twl_probe,
1340         .remove         = twl_remove,
1341 };
1342
1343 static int __init twl_init(void)
1344 {
1345         return i2c_add_driver(&twl_driver);
1346 }
1347 subsys_initcall(twl_init);
1348
1349 static void __exit twl_exit(void)
1350 {
1351         i2c_del_driver(&twl_driver);
1352 }
1353 module_exit(twl_exit);
1354
1355 MODULE_AUTHOR("Texas Instruments, Inc.");
1356 MODULE_DESCRIPTION("I2C Core interface for TWL");
1357 MODULE_LICENSE("GPL");