Pileus Git - ~andy/linux/blob - 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 /* Triton Core internal information (BEGIN) */
  67
  68 /* Last - for index max*/
  69 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
  70
  71 #define TWL_NUM_SLAVES          4
  72
  73 #define SUB_CHIP_ID0 0
  74 #define SUB_CHIP_ID1 1
  75 #define SUB_CHIP_ID2 2
  76 #define SUB_CHIP_ID3 3
  77 #define SUB_CHIP_ID_INVAL 0xff
  78
  79 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
  80
  81 /* Base Address defns for twl4030_map[] */
  82
  83 /* subchip/slave 0 - USB ID */
  84 #define TWL4030_BASEADD_USB             0x0000
  85
  86 /* subchip/slave 1 - AUD ID */
  87 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
  88 #define TWL4030_BASEADD_GPIO            0x0098
  89 #define TWL4030_BASEADD_INTBR           0x0085
  90 #define TWL4030_BASEADD_PIH             0x0080
  91 #define TWL4030_BASEADD_TEST            0x004C
  92
  93 /* subchip/slave 2 - AUX ID */
  94 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
  95 #define TWL4030_BASEADD_LED             0x00EE
  96 #define TWL4030_BASEADD_MADC            0x0000
  97 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
  98 #define TWL4030_BASEADD_PRECHARGE       0x00AA
  99 #define TWL4030_BASEADD_PWM0            0x00F8
 100 #define TWL4030_BASEADD_PWM1            0x00FB
 101 #define TWL4030_BASEADD_PWMA            0x00EF
 102 #define TWL4030_BASEADD_PWMB            0x00F1
 103 #define TWL4030_BASEADD_KEYPAD          0x00D2
 104
 105 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 106 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 107                                                   one */
 108
 109 /* subchip/slave 3 - POWER ID */
 110 #define TWL4030_BASEADD_BACKUP          0x0014
 111 #define TWL4030_BASEADD_INT             0x002E
 112 #define TWL4030_BASEADD_PM_MASTER       0x0036
 113 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 114 #define TWL4030_BASEADD_RTC             0x001C
 115 #define TWL4030_BASEADD_SECURED_REG     0x0000
 116
 117 /* Triton Core internal information (END) */
 118
 119
 120 /* subchip/slave 0 0x48 - POWER */
 121 #define TWL6030_BASEADD_RTC             0x0000
 122 #define TWL6030_BASEADD_MEM             0x0017
 123 #define TWL6030_BASEADD_PM_MASTER       0x001F
 124 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 125 #define TWL6030_BASEADD_PM_MISC         0x00E2
 126 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 127
 128 /* subchip/slave 1 0x49 - FEATURE */
 129 #define TWL6030_BASEADD_USB             0x0000
 130 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 131 #define TWL6030_BASEADD_AUX             0x0090
 132 #define TWL6030_BASEADD_PWM             0x00BA
 133 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 134 #define TWL6030_BASEADD_PIH             0x00D0
 135 #define TWL6030_BASEADD_CHARGER         0x00E0
 136 #define TWL6025_BASEADD_CHARGER         0x00DA
 137
 138 /* subchip/slave 2 0x4A - DFT */
 139 #define TWL6030_BASEADD_DIEID           0x00C0
 140
 141 /* subchip/slave 3 0x4B - AUDIO */
 142 #define TWL6030_BASEADD_AUDIO           0x0000
 143 #define TWL6030_BASEADD_RSV             0x0000
 144 #define TWL6030_BASEADD_ZERO            0x0000
 145
 146 /* Few power values */
 147 #define R_CFG_BOOT                      0x05
 148
 149 /* some fields in R_CFG_BOOT */
 150 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 151 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 152 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 153 #define HIGH_PERF_SQ                    (1 << 3)
 154 #define CK32K_LOWPWR_EN                 (1 << 7)
 155
 156 /*----------------------------------------------------------------------*/
 157
 158 /* is driver active, bound to a chip? */
 159 static bool inuse;
 160
 161 /* TWL IDCODE Register value */
 162 static u32 twl_idcode;
 163
 164 static unsigned int twl_id;
 165 unsigned int twl_rev(void)
 166 {
 167         return twl_id;
 168 }
 169 EXPORT_SYMBOL(twl_rev);
 170
 171 /* Structure for each TWL4030/TWL6030 Slave */
 172 struct twl_client {
 173         struct i2c_client *client;
 174         u8 address;
 175
 176         /* max numb of i2c_msg required is for read =2 */
 177         struct i2c_msg xfer_msg[2];
 178
 179         /* To lock access to xfer_msg */
 180         struct mutex xfer_lock;
 181 };
 182
 183 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 184
 185 /* mapping the module id to slave id and base address */
 186 struct twl_mapping {
 187         unsigned char sid;      /* Slave ID */
 188         unsigned char base;     /* base address */
 189 };
 190 static struct twl_mapping *twl_map;
 191
 192 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 193         /*
 194          * NOTE:  don't change this table without updating the
 195          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 196          * so they continue to match the order in this table.
 197          */
 198
 199         { 0, TWL4030_BASEADD_USB },
 200
 201         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 202         { 1, TWL4030_BASEADD_GPIO },
 203         { 1, TWL4030_BASEADD_INTBR },
 204         { 1, TWL4030_BASEADD_PIH },
 205         { 1, TWL4030_BASEADD_TEST },
 206
 207         { 2, TWL4030_BASEADD_KEYPAD },
 208         { 2, TWL4030_BASEADD_MADC },
 209         { 2, TWL4030_BASEADD_INTERRUPTS },
 210         { 2, TWL4030_BASEADD_LED },
 211         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 212         { 2, TWL4030_BASEADD_PRECHARGE },
 213         { 2, TWL4030_BASEADD_PWM0 },
 214         { 2, TWL4030_BASEADD_PWM1 },
 215         { 2, TWL4030_BASEADD_PWMA },
 216         { 2, TWL4030_BASEADD_PWMB },
 217         { 2, TWL5031_BASEADD_ACCESSORY },
 218         { 2, TWL5031_BASEADD_INTERRUPTS },
 219
 220         { 3, TWL4030_BASEADD_BACKUP },
 221         { 3, TWL4030_BASEADD_INT },
 222         { 3, TWL4030_BASEADD_PM_MASTER },
 223         { 3, TWL4030_BASEADD_PM_RECEIVER },
 224         { 3, TWL4030_BASEADD_RTC },
 225         { 3, TWL4030_BASEADD_SECURED_REG },
 226 };
 227
 228 static struct twl_mapping twl6030_map[] = {
 229         /*
 230          * NOTE:  don't change this table without updating the
 231          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 232          * so they continue to match the order in this table.
 233          */
 234         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 235         { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO },
 236         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 237         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 238         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 239
 240         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 241         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 242         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 243         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 244         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 245
 246         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 247         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 248         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 249         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 250         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 251
 252         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 253         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 254         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 255         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 256         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 257         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 258         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 259
 260         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 261         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 262         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 263 };
 264
 265 /*----------------------------------------------------------------------*/
 266
 267 /* Exported Functions */
 268
 269 /**
 270  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 271  * @mod_no: module number
 272  * @value: an array of num_bytes+1 containing data to write
 273  * @reg: register address (just offset will do)
 274  * @num_bytes: number of bytes to transfer
 275  *
 276  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 277  * valid data starts at Offset 1.
 278  *
 279  * Returns the result of operation - 0 is success
 280  */
 281 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 282 {
 283         int ret;
 284         int sid;
 285         struct twl_client *twl;
 286         struct i2c_msg *msg;
 287
 288         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 289                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 290                 return -EPERM;
 291         }
 292         if (unlikely(!inuse)) {
 293                 pr_err("%s: not initialized\n", DRIVER_NAME);
 294                 return -EPERM;
 295         }
 296         sid = twl_map[mod_no].sid;
 297         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 298                 pr_err("%s: module %d is not part of the pmic\n",
 299                        DRIVER_NAME, mod_no);
 300                 return -EINVAL;
 301         }
 302         twl = &twl_modules[sid];
 303
 304         mutex_lock(&twl->xfer_lock);
 305         /*
 306          * [MSG1]: fill the register address data
 307          * fill the data Tx buffer
 308          */
 309         msg = &twl->xfer_msg[0];
 310         msg->addr = twl->address;
 311         msg->len = num_bytes + 1;
 312         msg->flags = 0;
 313         msg->buf = value;
 314         /* over write the first byte of buffer with the register address */
 315         *value = twl_map[mod_no].base + reg;
 316         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 317         mutex_unlock(&twl->xfer_lock);
 318
 319         /* i2c_transfer returns number of messages transferred */
 320         if (ret != 1) {
 321                 pr_err("%s: i2c_write failed to transfer all messages\n",
 322                         DRIVER_NAME);
 323                 if (ret < 0)
 324                         return ret;
 325                 else
 326                         return -EIO;
 327         } else {
 328                 return 0;
 329         }
 330 }
 331 EXPORT_SYMBOL(twl_i2c_write);
 332
 333 /**
 334  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 335  * @mod_no: module number
 336  * @value: an array of num_bytes containing data to be read
 337  * @reg: register address (just offset will do)
 338  * @num_bytes: number of bytes to transfer
 339  *
 340  * Returns result of operation - num_bytes is success else failure.
 341  */
 342 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 343 {
 344         int ret;
 345         u8 val;
 346         int sid;
 347         struct twl_client *twl;
 348         struct i2c_msg *msg;
 349
 350         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 351                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 352                 return -EPERM;
 353         }
 354         if (unlikely(!inuse)) {
 355                 pr_err("%s: not initialized\n", DRIVER_NAME);
 356                 return -EPERM;
 357         }
 358         sid = twl_map[mod_no].sid;
 359         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 360                 pr_err("%s: module %d is not part of the pmic\n",
 361                        DRIVER_NAME, mod_no);
 362                 return -EINVAL;
 363         }
 364         twl = &twl_modules[sid];
 365
 366         mutex_lock(&twl->xfer_lock);
 367         /* [MSG1] fill the register address data */
 368         msg = &twl->xfer_msg[0];
 369         msg->addr = twl->address;
 370         msg->len = 1;
 371         msg->flags = 0; /* Read the register value */
 372         val = twl_map[mod_no].base + reg;
 373         msg->buf = &val;
 374         /* [MSG2] fill the data rx buffer */
 375         msg = &twl->xfer_msg[1];
 376         msg->addr = twl->address;
 377         msg->flags = I2C_M_RD;  /* Read the register value */
 378         msg->len = num_bytes;   /* only n bytes */
 379         msg->buf = value;
 380         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 381         mutex_unlock(&twl->xfer_lock);
 382
 383         /* i2c_transfer returns number of messages transferred */
 384         if (ret != 2) {
 385                 pr_err("%s: i2c_read failed to transfer all messages\n",
 386                         DRIVER_NAME);
 387                 if (ret < 0)
 388                         return ret;
 389                 else
 390                         return -EIO;
 391         } else {
 392                 return 0;
 393         }
 394 }
 395 EXPORT_SYMBOL(twl_i2c_read);
 396
 397 /**
 398  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 399  * @mod_no: module number
 400  * @value: the value to be written 8 bit
 401  * @reg: register address (just offset will do)
 402  *
 403  * Returns result of operation - 0 is success
 404  */
 405 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 406 {
 407
 408         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 409         u8 temp_buffer[2] = { 0 };
 410         /* offset 1 contains the data */
 411         temp_buffer[1] = value;
 412         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 413 }
 414 EXPORT_SYMBOL(twl_i2c_write_u8);
 415
 416 /**
 417  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 418  * @mod_no: module number
 419  * @value: the value read 8 bit
 420  * @reg: register address (just offset will do)
 421  *
 422  * Returns result of operation - 0 is success
 423  */
 424 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 425 {
 426         return twl_i2c_read(mod_no, value, reg, 1);
 427 }
 428 EXPORT_SYMBOL(twl_i2c_read_u8);
 429
 430 /*----------------------------------------------------------------------*/
 431
 432 /**
 433  * twl_read_idcode_register - API to read the IDCODE register.
 434  *
 435  * Unlocks the IDCODE register and read the 32 bit value.
 436  */
 437 static int twl_read_idcode_register(void)
 438 {
 439         int err;
 440
 441         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 442                                                 REG_UNLOCK_TEST_REG);
 443         if (err) {
 444                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 445                 goto fail;
 446         }
 447
 448         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 449                                                 REG_IDCODE_7_0, 4);
 450         if (err) {
 451                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 452                 goto fail;
 453         }
 454
 455         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 456         if (err)
 457                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 458 fail:
 459         return err;
 460 }
 461
 462 /**
 463  * twl_get_type - API to get TWL Si type.
 464  *
 465  * Api to get the TWL Si type from IDCODE value.
 466  */
 467 int twl_get_type(void)
 468 {
 469         return TWL_SIL_TYPE(twl_idcode);
 470 }
 471 EXPORT_SYMBOL_GPL(twl_get_type);
 472
 473 /**
 474  * twl_get_version - API to get TWL Si version.
 475  *
 476  * Api to get the TWL Si version from IDCODE value.
 477  */
 478 int twl_get_version(void)
 479 {
 480         return TWL_SIL_REV(twl_idcode);
 481 }
 482 EXPORT_SYMBOL_GPL(twl_get_version);
 483
 484 /**
 485  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
 486  *
 487  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
 488  */
 489 int twl_get_hfclk_rate(void)
 490 {
 491         u8 ctrl;
 492         int rate;
 493
 494         twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
 495
 496         switch (ctrl & 0x3) {
 497         case HFCLK_FREQ_19p2_MHZ:
 498                 rate = 19200000;
 499                 break;
 500         case HFCLK_FREQ_26_MHZ:
 501                 rate = 26000000;
 502                 break;
 503         case HFCLK_FREQ_38p4_MHZ:
 504                 rate = 38400000;
 505                 break;
 506         default:
 507                 pr_err("TWL4030: HFCLK is not configured\n");
 508                 rate = -EINVAL;
 509                 break;
 510         }
 511
 512         return rate;
 513 }
 514 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
 515
 516 static struct device *
 517 add_numbered_child(unsigned chip, const char *name, int num,
 518                 void *pdata, unsigned pdata_len,
 519                 bool can_wakeup, int irq0, int irq1)
 520 {
 521         struct platform_device  *pdev;
 522         struct twl_client       *twl = &twl_modules[chip];
 523         int                     status;
 524
 525         pdev = platform_device_alloc(name, num);
 526         if (!pdev) {
 527                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 528                 status = -ENOMEM;
 529                 goto err;
 530         }
 531
 532         pdev->dev.parent = &twl->client->dev;
 533
 534         if (pdata) {
 535                 status = platform_device_add_data(pdev, pdata, pdata_len);
 536                 if (status < 0) {
 537                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 538                         goto err;
 539                 }
 540         }
 541
 542         if (irq0) {
 543                 struct resource r[2] = {
 544                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 545                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 546                 };
 547
 548                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 549                 if (status < 0) {
 550                         dev_dbg(&pdev->dev, "can't add irqs\n");
 551                         goto err;
 552                 }
 553         }
 554
 555         status = platform_device_add(pdev);
 556         if (status == 0)
 557                 device_init_wakeup(&pdev->dev, can_wakeup);
 558
 559 err:
 560         if (status < 0) {
 561                 platform_device_put(pdev);
 562                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 563                 return ERR_PTR(status);
 564         }
 565         return &pdev->dev;
 566 }
 567
 568 static inline struct device *add_child(unsigned chip, const char *name,
 569                 void *pdata, unsigned pdata_len,
 570                 bool can_wakeup, int irq0, int irq1)
 571 {
 572         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 573                 can_wakeup, irq0, irq1);
 574 }
 575
 576 static struct device *
 577 add_regulator_linked(int num, struct regulator_init_data *pdata,
 578                 struct regulator_consumer_supply *consumers,
 579                 unsigned num_consumers, unsigned long features)
 580 {
 581         unsigned sub_chip_id;
 582         struct twl_regulator_driver_data drv_data;
 583
 584         /* regulator framework demands init_data ... */
 585         if (!pdata)
 586                 return NULL;
 587
 588         if (consumers) {
 589                 pdata->consumer_supplies = consumers;
 590                 pdata->num_consumer_supplies = num_consumers;
 591         }
 592
 593         if (pdata->driver_data) {
 594                 /* If we have existing drv_data, just add the flags */
 595                 struct twl_regulator_driver_data *tmp;
 596                 tmp = pdata->driver_data;
 597                 tmp->features |= features;
 598         } else {
 599                 /* add new driver data struct, used only during init */
 600                 drv_data.features = features;
 601                 drv_data.set_voltage = NULL;
 602                 drv_data.get_voltage = NULL;
 603                 drv_data.data = NULL;
 604                 pdata->driver_data = &drv_data;
 605         }
 606
 607         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 608         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 609         return add_numbered_child(sub_chip_id, "twl_reg", num,
 610                 pdata, sizeof(*pdata), false, 0, 0);
 611 }
 612
 613 static struct device *
 614 add_regulator(int num, struct regulator_init_data *pdata,
 615                 unsigned long features)
 616 {
 617         return add_regulator_linked(num, pdata, NULL, 0, features);
 618 }
 619
 620 /*
 621  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 622  * for the PIH, and the next are for the PWR_INT SIH, since
 623  * that's how twl_init_irq() sets things up.
 624  */
 625
 626 static int
 627 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 628                 unsigned long features)
 629 {
 630         struct device   *child;
 631         unsigned sub_chip_id;
 632
 633         if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
 634                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 635                                 pdata->gpio, sizeof(*pdata->gpio),
 636                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 637                 if (IS_ERR(child))
 638                         return PTR_ERR(child);
 639         }
 640
 641         if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
 642                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 643                                 pdata->keypad, sizeof(*pdata->keypad),
 644                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 645                 if (IS_ERR(child))
 646                         return PTR_ERR(child);
 647         }
 648
 649         if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc) {
 650                 child = add_child(2, "twl4030_madc",
 651                                 pdata->madc, sizeof(*pdata->madc),
 652                                 true, irq_base + MADC_INTR_OFFSET, 0);
 653                 if (IS_ERR(child))
 654                         return PTR_ERR(child);
 655         }
 656
 657         if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
 658                 /*
 659                  * REVISIT platform_data here currently might expose the
 660                  * "msecure" line ... but for now we just expect board
 661                  * setup to tell the chip "it's always ok to SET_TIME".
 662                  * Eventually, Linux might become more aware of such
 663                  * HW security concerns, and "least privilege".
 664                  */
 665                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 666                 child = add_child(sub_chip_id, "twl_rtc",
 667                                 NULL, 0,
 668                                 true, irq_base + RTC_INTR_OFFSET, 0);
 669                 if (IS_ERR(child))
 670                         return PTR_ERR(child);
 671         }
 672
 673         if (IS_ENABLED(CONFIG_PWM_TWL6030) && twl_class_is_6030()) {
 674                 child = add_child(TWL6030_MODULE_ID1, "twl6030-pwm", NULL, 0,
 675                                   false, 0, 0);
 676                 if (IS_ERR(child))
 677                         return PTR_ERR(child);
 678         }
 679
 680         if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
 681             twl_class_is_4030()) {
 682
 683                 static struct regulator_consumer_supply usb1v5 = {
 684                         .supply =       "usb1v5",
 685                 };
 686                 static struct regulator_consumer_supply usb1v8 = {
 687                         .supply =       "usb1v8",
 688                 };
 689                 static struct regulator_consumer_supply usb3v1[] = {
 690                         { .supply =     "usb3v1" },
 691                         { .supply =     "bci3v1" },
 692                 };
 693
 694         /* First add the regulators so that they can be used by transceiver */
 695                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 696                         /* this is a template that gets copied */
 697                         struct regulator_init_data usb_fixed = {
 698                                 .constraints.valid_modes_mask =
 699                                         REGULATOR_MODE_NORMAL
 700                                         | REGULATOR_MODE_STANDBY,
 701                                 .constraints.valid_ops_mask =
 702                                         REGULATOR_CHANGE_MODE
 703                                         | REGULATOR_CHANGE_STATUS,
 704                         };
 705
 706                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 707                                                       &usb_fixed, &usb1v5, 1,
 708                                                       features);
 709                         if (IS_ERR(child))
 710                                 return PTR_ERR(child);
 711
 712                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 713                                                       &usb_fixed, &usb1v8, 1,
 714                                                       features);
 715                         if (IS_ERR(child))
 716                                 return PTR_ERR(child);
 717
 718                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 719                                                       &usb_fixed, usb3v1, 2,
 720                                                       features);
 721                         if (IS_ERR(child))
 722                                 return PTR_ERR(child);
 723
 724                 }
 725
 726                 child = add_child(0, "twl4030_usb",
 727                                 pdata->usb, sizeof(*pdata->usb),
 728                                 true,
 729                                 /* irq0 = USB_PRES, irq1 = USB */
 730                                 irq_base + USB_PRES_INTR_OFFSET,
 731                                 irq_base + USB_INTR_OFFSET);
 732
 733                 if (IS_ERR(child))
 734                         return PTR_ERR(child);
 735
 736                 /* we need to connect regulators to this transceiver */
 737                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
 738                         usb1v5.dev_name = dev_name(child);
 739                         usb1v8.dev_name = dev_name(child);
 740                         usb3v1[0].dev_name = dev_name(child);
 741                 }
 742         }
 743         if (IS_ENABLED(CONFIG_TWL6030_USB) && pdata->usb &&
 744             twl_class_is_6030()) {
 745
 746                 static struct regulator_consumer_supply usb3v3;
 747                 int regulator;
 748
 749                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 750                         /* this is a template that gets copied */
 751                         struct regulator_init_data usb_fixed = {
 752                                 .constraints.valid_modes_mask =
 753                                         REGULATOR_MODE_NORMAL
 754                                         | REGULATOR_MODE_STANDBY,
 755                                 .constraints.valid_ops_mask =
 756                                         REGULATOR_CHANGE_MODE
 757                                         | REGULATOR_CHANGE_STATUS,
 758                         };
 759
 760                         if (features & TWL6025_SUBCLASS) {
 761                                 usb3v3.supply = "ldousb";
 762                                 regulator = TWL6025_REG_LDOUSB;
 763                         } else {
 764                                 usb3v3.supply = "vusb";
 765                                 regulator = TWL6030_REG_VUSB;
 766                         }
 767                         child = add_regulator_linked(regulator, &usb_fixed,
 768                                                         &usb3v3, 1,
 769                                                         features);
 770                         if (IS_ERR(child))
 771                                 return PTR_ERR(child);
 772                 }
 773
 774                 pdata->usb->features = features;
 775
 776                 child = add_child(0, "twl6030_usb",
 777                         pdata->usb, sizeof(*pdata->usb),
 778                         true,
 779                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 780                         irq_base + USBOTG_INTR_OFFSET,
 781                         irq_base + USB_PRES_INTR_OFFSET);
 782
 783                 if (IS_ERR(child))
 784                         return PTR_ERR(child);
 785                 /* we need to connect regulators to this transceiver */
 786                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child)
 787                         usb3v3.dev_name = dev_name(child);
 788         } else if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) &&
 789                    twl_class_is_6030()) {
 790                 if (features & TWL6025_SUBCLASS)
 791                         child = add_regulator(TWL6025_REG_LDOUSB,
 792                                                 pdata->ldousb, features);
 793                 else
 794                         child = add_regulator(TWL6030_REG_VUSB,
 795                                                 pdata->vusb, features);
 796
 797                         if (IS_ERR(child))
 798                                         return PTR_ERR(child);
 799         }
 800
 801         if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
 802                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 803                 if (IS_ERR(child))
 804                         return PTR_ERR(child);
 805         }
 806
 807         if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
 808                 child = add_child(1, "twl4030_pwrbutton",
 809                                 NULL, 0, true, irq_base + 8 + 0, 0);
 810                 if (IS_ERR(child))
 811                         return PTR_ERR(child);
 812         }
 813
 814         if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
 815             twl_class_is_4030()) {
 816                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 817                 child = add_child(sub_chip_id, "twl4030-audio",
 818                                 pdata->audio, sizeof(*pdata->audio),
 819                                 false, 0, 0);
 820                 if (IS_ERR(child))
 821                         return PTR_ERR(child);
 822         }
 823
 824         /* twl4030 regulators */
 825         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
 826                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 827                                         features);
 828                 if (IS_ERR(child))
 829                         return PTR_ERR(child);
 830
 831                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 832                                         features);
 833                 if (IS_ERR(child))
 834                         return PTR_ERR(child);
 835
 836                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 837                                         features);
 838                 if (IS_ERR(child))
 839                         return PTR_ERR(child);
 840
 841                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 842                                         features);
 843                 if (IS_ERR(child))
 844                         return PTR_ERR(child);
 845
 846                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 847                                         features);
 848                 if (IS_ERR(child))
 849                         return PTR_ERR(child);
 850
 851                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 852                                         features);
 853                 if (IS_ERR(child))
 854                         return PTR_ERR(child);
 855
 856                 child = add_regulator((features & TWL4030_VAUX2)
 857                                         ? TWL4030_REG_VAUX2_4030
 858                                         : TWL4030_REG_VAUX2,
 859                                 pdata->vaux2, features);
 860                 if (IS_ERR(child))
 861                         return PTR_ERR(child);
 862
 863                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 864                                         features);
 865                 if (IS_ERR(child))
 866                         return PTR_ERR(child);
 867
 868                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 869                                         features);
 870                 if (IS_ERR(child))
 871                         return PTR_ERR(child);
 872
 873                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 874                                         features);
 875                 if (IS_ERR(child))
 876                         return PTR_ERR(child);
 877         }
 878
 879         /* maybe add LDOs that are omitted on cost-reduced parts */
 880         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
 881           && twl_class_is_4030()) {
 882                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 883                                         features);
 884                 if (IS_ERR(child))
 885                         return PTR_ERR(child);
 886
 887                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 888                                         features);
 889                 if (IS_ERR(child))
 890                         return PTR_ERR(child);
 891
 892                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 893                                         features);
 894                 if (IS_ERR(child))
 895                         return PTR_ERR(child);
 896
 897                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 898                                         features);
 899                 if (IS_ERR(child))
 900                         return PTR_ERR(child);
 901
 902                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 903                                         features);
 904                 if (IS_ERR(child))
 905                         return PTR_ERR(child);
 906
 907                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 908                                         features);
 909                 if (IS_ERR(child))
 910                         return PTR_ERR(child);
 911         }
 912
 913         /* twl6030 regulators */
 914         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() &&
 915                         !(features & TWL6025_SUBCLASS)) {
 916                 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
 917                                         features);
 918                 if (IS_ERR(child))
 919                         return PTR_ERR(child);
 920
 921                 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
 922                                         features);
 923                 if (IS_ERR(child))
 924                         return PTR_ERR(child);
 925
 926                 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
 927                                         features);
 928                 if (IS_ERR(child))
 929                         return PTR_ERR(child);
 930
 931                 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8,
 932                                         features);
 933                 if (IS_ERR(child))
 934                         return PTR_ERR(child);
 935
 936                 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1,
 937                                         features);
 938                 if (IS_ERR(child))
 939                         return PTR_ERR(child);
 940
 941                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 942                                         features);
 943                 if (IS_ERR(child))
 944                         return PTR_ERR(child);
 945
 946                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 947                                         features);
 948                 if (IS_ERR(child))
 949                         return PTR_ERR(child);
 950
 951                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 952                                         features);
 953                 if (IS_ERR(child))
 954                         return PTR_ERR(child);
 955
 956                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 957                                         features);
 958                 if (IS_ERR(child))
 959                         return PTR_ERR(child);
 960
 961                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 962                                         features);
 963                 if (IS_ERR(child))
 964                         return PTR_ERR(child);
 965
 966                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 967                                         features);
 968                 if (IS_ERR(child))
 969                         return PTR_ERR(child);
 970
 971                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
 972                                         features);
 973                 if (IS_ERR(child))
 974                         return PTR_ERR(child);
 975
 976                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
 977                                         features);
 978                 if (IS_ERR(child))
 979                         return PTR_ERR(child);
 980
 981                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
 982                                         features);
 983                 if (IS_ERR(child))
 984                         return PTR_ERR(child);
 985         }
 986
 987         /* 6030 and 6025 share this regulator */
 988         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030()) {
 989                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
 990                                         features);
 991                 if (IS_ERR(child))
 992                         return PTR_ERR(child);
 993         }
 994
 995         /* twl6025 regulators */
 996         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() &&
 997                         (features & TWL6025_SUBCLASS)) {
 998                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
 999                                         features);
1000                 if (IS_ERR(child))
1001                         return PTR_ERR(child);
1002
1003                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1004                                         features);
1005                 if (IS_ERR(child))
1006                         return PTR_ERR(child);
1007
1008                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1009                                         features);
1010                 if (IS_ERR(child))
1011                         return PTR_ERR(child);
1012
1013                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1014                                         features);
1015                 if (IS_ERR(child))
1016                         return PTR_ERR(child);
1017
1018                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1019                                         features);
1020                 if (IS_ERR(child))
1021                         return PTR_ERR(child);
1022
1023                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1024                                         features);
1025                 if (IS_ERR(child))
1026                         return PTR_ERR(child);
1027
1028                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1029                                         features);
1030                 if (IS_ERR(child))
1031                         return PTR_ERR(child);
1032
1033                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1034                                         features);
1035                 if (IS_ERR(child))
1036                         return PTR_ERR(child);
1037
1038                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1039                                         features);
1040                 if (IS_ERR(child))
1041                         return PTR_ERR(child);
1042
1043                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1044                                         features);
1045                 if (IS_ERR(child))
1046                         return PTR_ERR(child);
1047
1048                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1049                                         features);
1050                 if (IS_ERR(child))
1051                         return PTR_ERR(child);
1052
1053         }
1054
1055         if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
1056                         !(features & (TPS_SUBSET | TWL5031))) {
1057                 child = add_child(3, "twl4030_bci",
1058                                 pdata->bci, sizeof(*pdata->bci), false,
1059                                 /* irq0 = CHG_PRES, irq1 = BCI */
1060                                 irq_base + BCI_PRES_INTR_OFFSET,
1061                                 irq_base + BCI_INTR_OFFSET);
1062                 if (IS_ERR(child))
1063                         return PTR_ERR(child);
1064         }
1065
1066         return 0;
1067 }
1068
1069 /*----------------------------------------------------------------------*/
1070
1071 /*
1072  * These three functions initialize the on-chip clock framework,
1073  * letting it generate the right frequencies for USB, MADC, and
1074  * other purposes.
1075  */
1076 static inline int __init protect_pm_master(void)
1077 {
1078         int e = 0;
1079
1080         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1081                         TWL4030_PM_MASTER_PROTECT_KEY);
1082         return e;
1083 }
1084
1085 static inline int __init unprotect_pm_master(void)
1086 {
1087         int e = 0;
1088
1089         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1090                         TWL4030_PM_MASTER_KEY_CFG1,
1091                         TWL4030_PM_MASTER_PROTECT_KEY);
1092         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1093                         TWL4030_PM_MASTER_KEY_CFG2,
1094                         TWL4030_PM_MASTER_PROTECT_KEY);
1095
1096         return e;
1097 }
1098
1099 static void clocks_init(struct device *dev,
1100                         struct twl4030_clock_init_data *clock)
1101 {
1102         int e = 0;
1103         struct clk *osc;
1104         u32 rate;
1105         u8 ctrl = HFCLK_FREQ_26_MHZ;
1106
1107         osc = clk_get(dev, "fck");
1108         if (IS_ERR(osc)) {
1109                 printk(KERN_WARNING "Skipping twl internal clock init and "
1110                                 "using bootloader value (unknown osc rate)\n");
1111                 return;
1112         }
1113
1114         rate = clk_get_rate(osc);
1115         clk_put(osc);
1116
1117         switch (rate) {
1118         case 19200000:
1119                 ctrl = HFCLK_FREQ_19p2_MHZ;
1120                 break;
1121         case 26000000:
1122                 ctrl = HFCLK_FREQ_26_MHZ;
1123                 break;
1124         case 38400000:
1125                 ctrl = HFCLK_FREQ_38p4_MHZ;
1126                 break;
1127         }
1128
1129         ctrl |= HIGH_PERF_SQ;
1130         if (clock && clock->ck32k_lowpwr_enable)
1131                 ctrl |= CK32K_LOWPWR_EN;
1132
1133         e |= unprotect_pm_master();
1134         /* effect->MADC+USB ck en */
1135         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1136         e |= protect_pm_master();
1137
1138         if (e < 0)
1139                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1140 }
1141
1142 /*----------------------------------------------------------------------*/
1143
1144
1145 static int twl_remove(struct i2c_client *client)
1146 {
1147         unsigned i, num_slaves;
1148         int status;
1149
1150         if (twl_class_is_4030()) {
1151                 status = twl4030_exit_irq();
1152                 num_slaves = TWL_NUM_SLAVES;
1153         } else {
1154                 status = twl6030_exit_irq();
1155                 num_slaves = TWL_NUM_SLAVES - 1;
1156         }
1157
1158         if (status < 0)
1159                 return status;
1160
1161         for (i = 0; i < num_slaves; i++) {
1162                 struct twl_client       *twl = &twl_modules[i];
1163
1164                 if (twl->client && twl->client != client)
1165                         i2c_unregister_device(twl->client);
1166                 twl_modules[i].client = NULL;
1167         }
1168         inuse = false;
1169         return 0;
1170 }
1171
1172 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1173 static int __devinit
1174 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1175 {
1176         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1177         struct device_node              *node = client->dev.of_node;
1178         struct platform_device          *pdev;
1179         int                             irq_base = 0;
1180         int                             status;
1181         unsigned                        i, num_slaves;
1182
1183         pdev = platform_device_alloc(DRIVER_NAME, -1);
1184         if (!pdev) {
1185                 dev_err(&client->dev, "can't alloc pdev\n");
1186                 return -ENOMEM;
1187         }
1188
1189         status = platform_device_add(pdev);
1190         if (status) {
1191                 platform_device_put(pdev);
1192                 return status;
1193         }
1194
1195         if (node && !pdata) {
1196                 /*
1197                  * XXX: Temporary pdata until the information is correctly
1198                  * retrieved by every TWL modules from DT.
1199                  */
1200                 pdata = devm_kzalloc(&client->dev,
1201                                      sizeof(struct twl4030_platform_data),
1202                                      GFP_KERNEL);
1203                 if (!pdata) {
1204                         status = -ENOMEM;
1205                         goto free;
1206                 }
1207         }
1208
1209         if (!pdata) {
1210                 dev_dbg(&client->dev, "no platform data?\n");
1211                 status = -EINVAL;
1212                 goto free;
1213         }
1214
1215         platform_set_drvdata(pdev, pdata);
1216
1217         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1218                 dev_dbg(&client->dev, "can't talk I2C?\n");
1219                 status = -EIO;
1220                 goto free;
1221         }
1222
1223         if (inuse) {
1224                 dev_dbg(&client->dev, "driver is already in use\n");
1225                 status = -EBUSY;
1226                 goto free;
1227         }
1228
1229         if ((id->driver_data) & TWL6030_CLASS) {
1230                 twl_id = TWL6030_CLASS_ID;
1231                 twl_map = &twl6030_map[0];
1232                 num_slaves = TWL_NUM_SLAVES - 1;
1233         } else {
1234                 twl_id = TWL4030_CLASS_ID;
1235                 twl_map = &twl4030_map[0];
1236                 num_slaves = TWL_NUM_SLAVES;
1237         }
1238
1239         for (i = 0; i < num_slaves; i++) {
1240                 struct twl_client *twl = &twl_modules[i];
1241
1242                 twl->address = client->addr + i;
1243                 if (i == 0) {
1244                         twl->client = client;
1245                 } else {
1246                         twl->client = i2c_new_dummy(client->adapter,
1247                                         twl->address);
1248                         if (!twl->client) {
1249                                 dev_err(&client->dev,
1250                                         "can't attach client %d\n", i);
1251                                 status = -ENOMEM;
1252                                 goto fail;
1253                         }
1254                 }
1255                 mutex_init(&twl->xfer_lock);
1256         }
1257
1258         inuse = true;
1259
1260         /* setup clock framework */
1261         clocks_init(&pdev->dev, pdata->clock);
1262
1263         /* read TWL IDCODE Register */
1264         if (twl_id == TWL4030_CLASS_ID) {
1265                 status = twl_read_idcode_register();
1266                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1267         }
1268
1269         /* load power event scripts */
1270         if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power)
1271                 twl4030_power_init(pdata->power);
1272
1273         /* Maybe init the T2 Interrupt subsystem */
1274         if (client->irq) {
1275                 if (twl_class_is_4030()) {
1276                         twl4030_init_chip_irq(id->name);
1277                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1278                 } else {
1279                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1280                 }
1281
1282                 if (irq_base < 0) {
1283                         status = irq_base;
1284                         goto fail;
1285                 }
1286         }
1287
1288         /*
1289          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1290          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1291          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1292          */
1293         if (twl_class_is_4030()) {
1294                 u8 temp;
1295
1296                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1297                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1298                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1299                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1300         }
1301
1302         status = -ENODEV;
1303         if (node)
1304                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1305         if (status)
1306                 status = add_children(pdata, irq_base, id->driver_data);
1307
1308 fail:
1309         if (status < 0)
1310                 twl_remove(client);
1311 free:
1312         if (status < 0)
1313                 platform_device_unregister(pdev);
1314
1315         return status;
1316 }
1317
1318 static const struct i2c_device_id twl_ids[] = {
1319         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1320         { "twl5030", 0 },               /* T2 updated */
1321         { "twl5031", TWL5031 },         /* TWL5030 updated */
1322         { "tps65950", 0 },              /* catalog version of twl5030 */
1323         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1324         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1325         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1326                                            and vibrator. Charger in USB module*/
1327         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1328         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1329         { /* end of list */ },
1330 };
1331 MODULE_DEVICE_TABLE(i2c, twl_ids);
1332
1333 /* One Client Driver , 4 Clients */
1334 static struct i2c_driver twl_driver = {
1335         .driver.name    = DRIVER_NAME,
1336         .id_table       = twl_ids,
1337         .probe          = twl_probe,
1338         .remove         = twl_remove,
1339 };
1340
1341 static int __init twl_init(void)
1342 {
1343         return i2c_add_driver(&twl_driver);
1344 }
1345 subsys_initcall(twl_init);
1346
1347 static void __exit twl_exit(void)
1348 {
1349         i2c_del_driver(&twl_driver);
1350 }
1351 module_exit(twl_exit);
1352
1353 MODULE_AUTHOR("Texas Instruments, Inc.");
1354 MODULE_DESCRIPTION("I2C Core interface for TWL");
1355 MODULE_LICENSE("GPL");