kernel/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/regmap.h>
  36 #include <linux/clk.h>
  37 #include <linux/err.h>
  38 #include <linux/device.h>
  39 #include <linux/of.h>
  40 #include <linux/of_irq.h>
  41 #include <linux/of_platform.h>
  42 #include <linux/irq.h>
  43 #include <linux/irqdomain.h>
  44
  45 #include <linux/regulator/machine.h>
  46
  47 #include <linux/i2c.h>
  48 #include <linux/i2c/twl.h>
  49
  50 /* Register descriptions for audio */
  51 #include <linux/mfd/twl4030-audio.h>
  52
  53 #include "twl-core.h"
  54
  55 /*
  56  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  57  * Management and System Companion Device" chips originally designed for
  58  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  59  * often at around 3 Mbit/sec, including for interrupt handling.
  60  *
  61  * This driver core provides genirq support for the interrupts emitted,
  62  * by the various modules, and exports register access primitives.
  63  *
  64  * FIXME this driver currently requires use of the first interrupt line
  65  * (and associated registers).
  66  */
  67
  68 #define DRIVER_NAME                     "twl"
  69
  70 /* Triton Core internal information (BEGIN) */
  71
  72 /* Base Address defns for twl4030_map[] */
  73
  74 /* subchip/slave 0 - USB ID */
  75 #define TWL4030_BASEADD_USB             0x0000
  76
  77 /* subchip/slave 1 - AUD ID */
  78 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
  79 #define TWL4030_BASEADD_GPIO            0x0098
  80 #define TWL4030_BASEADD_INTBR           0x0085
  81 #define TWL4030_BASEADD_PIH             0x0080
  82 #define TWL4030_BASEADD_TEST            0x004C
  83
  84 /* subchip/slave 2 - AUX ID */
  85 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
  86 #define TWL4030_BASEADD_LED             0x00EE
  87 #define TWL4030_BASEADD_MADC            0x0000
  88 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
  89 #define TWL4030_BASEADD_PRECHARGE       0x00AA
  90 #define TWL4030_BASEADD_PWM             0x00F8
  91 #define TWL4030_BASEADD_KEYPAD          0x00D2
  92
  93 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
  94 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
  95                                                   one */
  96
  97 /* subchip/slave 3 - POWER ID */
  98 #define TWL4030_BASEADD_BACKUP          0x0014
  99 #define TWL4030_BASEADD_INT             0x002E
 100 #define TWL4030_BASEADD_PM_MASTER       0x0036
 101
 102 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 103 #define TWL4030_DCDC_GLOBAL_CFG         0x06
 104 #define SMARTREFLEX_ENABLE              BIT(3)
 105
 106 #define TWL4030_BASEADD_RTC             0x001C
 107 #define TWL4030_BASEADD_SECURED_REG     0x0000
 108
 109 /* Triton Core internal information (END) */
 110
 111
 112 /* subchip/slave 0 0x48 - POWER */
 113 #define TWL6030_BASEADD_RTC             0x0000
 114 #define TWL6030_BASEADD_SECURED_REG     0x0017
 115 #define TWL6030_BASEADD_PM_MASTER       0x001F
 116 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 117 #define TWL6030_BASEADD_PM_MISC         0x00E2
 118 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 119
 120 /* subchip/slave 1 0x49 - FEATURE */
 121 #define TWL6030_BASEADD_USB             0x0000
 122 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 123 #define TWL6030_BASEADD_AUX             0x0090
 124 #define TWL6030_BASEADD_PWM             0x00BA
 125 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 126 #define TWL6030_BASEADD_PIH             0x00D0
 127 #define TWL6030_BASEADD_CHARGER         0x00E0
 128 #define TWL6032_BASEADD_CHARGER         0x00DA
 129 #define TWL6030_BASEADD_LED             0x00F4
 130
 131 /* subchip/slave 2 0x4A - DFT */
 132 #define TWL6030_BASEADD_DIEID           0x00C0
 133
 134 /* subchip/slave 3 0x4B - AUDIO */
 135 #define TWL6030_BASEADD_AUDIO           0x0000
 136 #define TWL6030_BASEADD_RSV             0x0000
 137 #define TWL6030_BASEADD_ZERO            0x0000
 138
 139 /* Few power values */
 140 #define R_CFG_BOOT                      0x05
 141
 142 /* some fields in R_CFG_BOOT */
 143 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 144 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 145 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 146 #define HIGH_PERF_SQ                    (1 << 3)
 147 #define CK32K_LOWPWR_EN                 (1 << 7)
 148
 149 /*----------------------------------------------------------------------*/
 150
 151 /* Structure for each TWL4030/TWL6030 Slave */
 152 struct twl_client {
 153         struct i2c_client *client;
 154         struct regmap *regmap;
 155 };
 156
 157 /* mapping the module id to slave id and base address */
 158 struct twl_mapping {
 159         unsigned char sid;      /* Slave ID */
 160         unsigned char base;     /* base address */
 161 };
 162
 163 struct twl_private {
 164         bool ready; /* The core driver is ready to be used */
 165         u32 twl_idcode; /* TWL IDCODE Register value */
 166         unsigned int twl_id;
 167
 168         struct twl_mapping *twl_map;
 169         struct twl_client *twl_modules;
 170 };
 171
 172 static struct twl_private *twl_priv;
 173
 174 static struct twl_mapping twl4030_map[] = {
 175         /*
 176          * NOTE:  don't change this table without updating the
 177          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 178          * so they continue to match the order in this table.
 179          */
 180
 181         /* Common IPs */
 182         { 0, TWL4030_BASEADD_USB },
 183         { 1, TWL4030_BASEADD_PIH },
 184         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 185         { 3, TWL4030_BASEADD_PM_MASTER },
 186         { 3, TWL4030_BASEADD_PM_RECEIVER },
 187
 188         { 3, TWL4030_BASEADD_RTC },
 189         { 2, TWL4030_BASEADD_PWM },
 190         { 2, TWL4030_BASEADD_LED },
 191         { 3, TWL4030_BASEADD_SECURED_REG },
 192
 193         /* TWL4030 specific IPs */
 194         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 195         { 1, TWL4030_BASEADD_GPIO },
 196         { 1, TWL4030_BASEADD_INTBR },
 197         { 1, TWL4030_BASEADD_TEST },
 198         { 2, TWL4030_BASEADD_KEYPAD },
 199
 200         { 2, TWL4030_BASEADD_MADC },
 201         { 2, TWL4030_BASEADD_INTERRUPTS },
 202         { 2, TWL4030_BASEADD_PRECHARGE },
 203         { 3, TWL4030_BASEADD_BACKUP },
 204         { 3, TWL4030_BASEADD_INT },
 205
 206         { 2, TWL5031_BASEADD_ACCESSORY },
 207         { 2, TWL5031_BASEADD_INTERRUPTS },
 208 };
 209
 210 static const struct reg_default twl4030_49_defaults[] = {
 211         /* Audio Registers */
 212         { 0x01, 0x00}, /* CODEC_MODE    */
 213         { 0x02, 0x00}, /* OPTION        */
 214         /* 0x03  Unused */
 215         { 0x04, 0x00}, /* MICBIAS_CTL   */
 216         { 0x05, 0x00}, /* ANAMICL       */
 217         { 0x06, 0x00}, /* ANAMICR       */
 218         { 0x07, 0x00}, /* AVADC_CTL     */
 219         { 0x08, 0x00}, /* ADCMICSEL     */
 220         { 0x09, 0x00}, /* DIGMIXING     */
 221         { 0x0a, 0x0f}, /* ATXL1PGA      */
 222         { 0x0b, 0x0f}, /* ATXR1PGA      */
 223         { 0x0c, 0x0f}, /* AVTXL2PGA     */
 224         { 0x0d, 0x0f}, /* AVTXR2PGA     */
 225         { 0x0e, 0x00}, /* AUDIO_IF      */
 226         { 0x0f, 0x00}, /* VOICE_IF      */
 227         { 0x10, 0x3f}, /* ARXR1PGA      */
 228         { 0x11, 0x3f}, /* ARXL1PGA      */
 229         { 0x12, 0x3f}, /* ARXR2PGA      */
 230         { 0x13, 0x3f}, /* ARXL2PGA      */
 231         { 0x14, 0x25}, /* VRXPGA        */
 232         { 0x15, 0x00}, /* VSTPGA        */
 233         { 0x16, 0x00}, /* VRX2ARXPGA    */
 234         { 0x17, 0x00}, /* AVDAC_CTL     */
 235         { 0x18, 0x00}, /* ARX2VTXPGA    */
 236         { 0x19, 0x32}, /* ARXL1_APGA_CTL*/
 237         { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
 238         { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
 239         { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
 240         { 0x1d, 0x00}, /* ATX2ARXPGA    */
 241         { 0x1e, 0x00}, /* BT_IF         */
 242         { 0x1f, 0x55}, /* BTPGA         */
 243         { 0x20, 0x00}, /* BTSTPGA       */
 244         { 0x21, 0x00}, /* EAR_CTL       */
 245         { 0x22, 0x00}, /* HS_SEL        */
 246         { 0x23, 0x00}, /* HS_GAIN_SET   */
 247         { 0x24, 0x00}, /* HS_POPN_SET   */
 248         { 0x25, 0x00}, /* PREDL_CTL     */
 249         { 0x26, 0x00}, /* PREDR_CTL     */
 250         { 0x27, 0x00}, /* PRECKL_CTL    */
 251         { 0x28, 0x00}, /* PRECKR_CTL    */
 252         { 0x29, 0x00}, /* HFL_CTL       */
 253         { 0x2a, 0x00}, /* HFR_CTL       */
 254         { 0x2b, 0x05}, /* ALC_CTL       */
 255         { 0x2c, 0x00}, /* ALC_SET1      */
 256         { 0x2d, 0x00}, /* ALC_SET2      */
 257         { 0x2e, 0x00}, /* BOOST_CTL     */
 258         { 0x2f, 0x00}, /* SOFTVOL_CTL   */
 259         { 0x30, 0x13}, /* DTMF_FREQSEL  */
 260         { 0x31, 0x00}, /* DTMF_TONEXT1H */
 261         { 0x32, 0x00}, /* DTMF_TONEXT1L */
 262         { 0x33, 0x00}, /* DTMF_TONEXT2H */
 263         { 0x34, 0x00}, /* DTMF_TONEXT2L */
 264         { 0x35, 0x79}, /* DTMF_TONOFF   */
 265         { 0x36, 0x11}, /* DTMF_WANONOFF */
 266         { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
 267         { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
 268         { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
 269         { 0x3a, 0x06}, /* APLL_CTL */
 270         { 0x3b, 0x00}, /* DTMF_CTL */
 271         { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
 272         { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
 273         { 0x3e, 0x00}, /* MISC_SET_1 */
 274         { 0x3f, 0x00}, /* PCMBTMUX */
 275         /* 0x40 - 0x42  Unused */
 276         { 0x43, 0x00}, /* RX_PATH_SEL */
 277         { 0x44, 0x32}, /* VDL_APGA_CTL */
 278         { 0x45, 0x00}, /* VIBRA_CTL */
 279         { 0x46, 0x00}, /* VIBRA_SET */
 280         { 0x47, 0x00}, /* VIBRA_PWM_SET */
 281         { 0x48, 0x00}, /* ANAMIC_GAIN   */
 282         { 0x49, 0x00}, /* MISC_SET_2    */
 283         /* End of Audio Registers */
 284 };
 285
 286 static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
 287 {
 288         switch (reg) {
 289         case 0x00:
 290         case 0x03:
 291         case 0x40:
 292         case 0x41:
 293         case 0x42:
 294                 return false;
 295         default:
 296                 return true;
 297         }
 298 }
 299
 300 static const struct regmap_range twl4030_49_volatile_ranges[] = {
 301         regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
 302 };
 303
 304 static const struct regmap_access_table twl4030_49_volatile_table = {
 305         .yes_ranges = twl4030_49_volatile_ranges,
 306         .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
 307 };
 308
 309 static const struct regmap_config twl4030_regmap_config[4] = {
 310         {
 311                 /* Address 0x48 */
 312                 .reg_bits = 8,
 313                 .val_bits = 8,
 314                 .max_register = 0xff,
 315         },
 316         {
 317                 /* Address 0x49 */
 318                 .reg_bits = 8,
 319                 .val_bits = 8,
 320                 .max_register = 0xff,
 321
 322                 .readable_reg = twl4030_49_nop_reg,
 323                 .writeable_reg = twl4030_49_nop_reg,
 324
 325                 .volatile_table = &twl4030_49_volatile_table,
 326
 327                 .reg_defaults = twl4030_49_defaults,
 328                 .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
 329                 .cache_type = REGCACHE_RBTREE,
 330         },
 331         {
 332                 /* Address 0x4a */
 333                 .reg_bits = 8,
 334                 .val_bits = 8,
 335                 .max_register = 0xff,
 336         },
 337         {
 338                 /* Address 0x4b */
 339                 .reg_bits = 8,
 340                 .val_bits = 8,
 341                 .max_register = 0xff,
 342         },
 343 };
 344
 345 static struct twl_mapping twl6030_map[] = {
 346         /*
 347          * NOTE:  don't change this table without updating the
 348          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 349          * so they continue to match the order in this table.
 350          */
 351
 352         /* Common IPs */
 353         { 1, TWL6030_BASEADD_USB },
 354         { 1, TWL6030_BASEADD_PIH },
 355         { 1, TWL6030_BASEADD_CHARGER },
 356         { 0, TWL6030_BASEADD_PM_MASTER },
 357         { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
 358
 359         { 0, TWL6030_BASEADD_RTC },
 360         { 1, TWL6030_BASEADD_PWM },
 361         { 1, TWL6030_BASEADD_LED },
 362         { 0, TWL6030_BASEADD_SECURED_REG },
 363
 364         /* TWL6030 specific IPs */
 365         { 0, TWL6030_BASEADD_ZERO },
 366         { 1, TWL6030_BASEADD_ZERO },
 367         { 2, TWL6030_BASEADD_ZERO },
 368         { 1, TWL6030_BASEADD_GPADC_CTRL },
 369         { 1, TWL6030_BASEADD_GASGAUGE },
 370 };
 371
 372 static const struct regmap_config twl6030_regmap_config[3] = {
 373         {
 374                 /* Address 0x48 */
 375                 .reg_bits = 8,
 376                 .val_bits = 8,
 377                 .max_register = 0xff,
 378         },
 379         {
 380                 /* Address 0x49 */
 381                 .reg_bits = 8,
 382                 .val_bits = 8,
 383                 .max_register = 0xff,
 384         },
 385         {
 386                 /* Address 0x4a */
 387                 .reg_bits = 8,
 388                 .val_bits = 8,
 389                 .max_register = 0xff,
 390         },
 391 };
 392
 393 /*----------------------------------------------------------------------*/
 394
 395 static inline int twl_get_num_slaves(void)
 396 {
 397         if (twl_class_is_4030())
 398                 return 4; /* TWL4030 class have four slave address */
 399         else
 400                 return 3; /* TWL6030 class have three slave address */
 401 }
 402
 403 static inline int twl_get_last_module(void)
 404 {
 405         if (twl_class_is_4030())
 406                 return TWL4030_MODULE_LAST;
 407         else
 408                 return TWL6030_MODULE_LAST;
 409 }
 410
 411 /* Exported Functions */
 412
 413 unsigned int twl_rev(void)
 414 {
 415         return twl_priv ? twl_priv->twl_id : 0;
 416 }
 417 EXPORT_SYMBOL(twl_rev);
 418
 419 /**
 420  * twl_get_regmap - Get the regmap associated with the given module
 421  * @mod_no: module number
 422  *
 423  * Returns the regmap pointer or NULL in case of failure.
 424  */
 425 static struct regmap *twl_get_regmap(u8 mod_no)
 426 {
 427         int sid;
 428         struct twl_client *twl;
 429
 430         if (unlikely(!twl_priv || !twl_priv->ready)) {
 431                 pr_err("%s: not initialized\n", DRIVER_NAME);
 432                 return NULL;
 433         }
 434         if (unlikely(mod_no >= twl_get_last_module())) {
 435                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 436                 return NULL;
 437         }
 438
 439         sid = twl_priv->twl_map[mod_no].sid;
 440         twl = &twl_priv->twl_modules[sid];
 441
 442         return twl->regmap;
 443 }
 444
 445 /**
 446  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 447  * @mod_no: module number
 448  * @value: an array of num_bytes+1 containing data to write
 449  * @reg: register address (just offset will do)
 450  * @num_bytes: number of bytes to transfer
 451  *
 452  * Returns the result of operation - 0 is success
 453  */
 454 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 455 {
 456         struct regmap *regmap = twl_get_regmap(mod_no);
 457         int ret;
 458
 459         if (!regmap)
 460                 return -EPERM;
 461
 462         ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
 463                                 value, num_bytes);
 464
 465         if (ret)
 466                 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
 467                        DRIVER_NAME, mod_no, reg, num_bytes);
 468
 469         return ret;
 470 }
 471 EXPORT_SYMBOL(twl_i2c_write);
 472
 473 /**
 474  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 475  * @mod_no: module number
 476  * @value: an array of num_bytes containing data to be read
 477  * @reg: register address (just offset will do)
 478  * @num_bytes: number of bytes to transfer
 479  *
 480  * Returns result of operation - num_bytes is success else failure.
 481  */
 482 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 483 {
 484         struct regmap *regmap = twl_get_regmap(mod_no);
 485         int ret;
 486
 487         if (!regmap)
 488                 return -EPERM;
 489
 490         ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
 491                                value, num_bytes);
 492
 493         if (ret)
 494                 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
 495                        DRIVER_NAME, mod_no, reg, num_bytes);
 496
 497         return ret;
 498 }
 499 EXPORT_SYMBOL(twl_i2c_read);
 500
 501 /**
 502  * twl_regcache_bypass - Configure the regcache bypass for the regmap associated
 503  *                       with the module
 504  * @mod_no: module number
 505  * @enable: Regcache bypass state
 506  *
 507  * Returns 0 else failure.
 508  */
 509 int twl_set_regcache_bypass(u8 mod_no, bool enable)
 510 {
 511         struct regmap *regmap = twl_get_regmap(mod_no);
 512
 513         if (!regmap)
 514                 return -EPERM;
 515
 516         regcache_cache_bypass(regmap, enable);
 517
 518         return 0;
 519 }
 520 EXPORT_SYMBOL(twl_set_regcache_bypass);
 521
 522 /*----------------------------------------------------------------------*/
 523
 524 /**
 525  * twl_read_idcode_register - API to read the IDCODE register.
 526  *
 527  * Unlocks the IDCODE register and read the 32 bit value.
 528  */
 529 static int twl_read_idcode_register(void)
 530 {
 531         int err;
 532
 533         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 534                                                 REG_UNLOCK_TEST_REG);
 535         if (err) {
 536                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 537                 goto fail;
 538         }
 539
 540         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
 541                                                 REG_IDCODE_7_0, 4);
 542         if (err) {
 543                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 544                 goto fail;
 545         }
 546
 547         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 548         if (err)
 549                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 550 fail:
 551         return err;
 552 }
 553
 554 /**
 555  * twl_get_type - API to get TWL Si type.
 556  *
 557  * Api to get the TWL Si type from IDCODE value.
 558  */
 559 int twl_get_type(void)
 560 {
 561         return TWL_SIL_TYPE(twl_priv->twl_idcode);
 562 }
 563 EXPORT_SYMBOL_GPL(twl_get_type);
 564
 565 /**
 566  * twl_get_version - API to get TWL Si version.
 567  *
 568  * Api to get the TWL Si version from IDCODE value.
 569  */
 570 int twl_get_version(void)
 571 {
 572         return TWL_SIL_REV(twl_priv->twl_idcode);
 573 }
 574 EXPORT_SYMBOL_GPL(twl_get_version);
 575
 576 /**
 577  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
 578  *
 579  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
 580  */
 581 int twl_get_hfclk_rate(void)
 582 {
 583         u8 ctrl;
 584         int rate;
 585
 586         twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
 587
 588         switch (ctrl & 0x3) {
 589         case HFCLK_FREQ_19p2_MHZ:
 590                 rate = 19200000;
 591                 break;
 592         case HFCLK_FREQ_26_MHZ:
 593                 rate = 26000000;
 594                 break;
 595         case HFCLK_FREQ_38p4_MHZ:
 596                 rate = 38400000;
 597                 break;
 598         default:
 599                 pr_err("TWL4030: HFCLK is not configured\n");
 600                 rate = -EINVAL;
 601                 break;
 602         }
 603
 604         return rate;
 605 }
 606 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
 607
 608 static struct device *
 609 add_numbered_child(unsigned mod_no, const char *name, int num,
 610                 void *pdata, unsigned pdata_len,
 611                 bool can_wakeup, int irq0, int irq1)
 612 {
 613         struct platform_device  *pdev;
 614         struct twl_client       *twl;
 615         int                     status, sid;
 616
 617         if (unlikely(mod_no >= twl_get_last_module())) {
 618                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 619                 return ERR_PTR(-EPERM);
 620         }
 621         sid = twl_priv->twl_map[mod_no].sid;
 622         twl = &twl_priv->twl_modules[sid];
 623
 624         pdev = platform_device_alloc(name, num);
 625         if (!pdev) {
 626                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 627                 status = -ENOMEM;
 628                 goto err;
 629         }
 630
 631         pdev->dev.parent = &twl->client->dev;
 632
 633         if (pdata) {
 634                 status = platform_device_add_data(pdev, pdata, pdata_len);
 635                 if (status < 0) {
 636                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 637                         goto err;
 638                 }
 639         }
 640
 641         if (irq0) {
 642                 struct resource r[2] = {
 643                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 644                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 645                 };
 646
 647                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 648                 if (status < 0) {
 649                         dev_dbg(&pdev->dev, "can't add irqs\n");
 650                         goto err;
 651                 }
 652         }
 653
 654         status = platform_device_add(pdev);
 655         if (status == 0)
 656                 device_init_wakeup(&pdev->dev, can_wakeup);
 657
 658 err:
 659         if (status < 0) {
 660                 platform_device_put(pdev);
 661                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 662                 return ERR_PTR(status);
 663         }
 664         return &pdev->dev;
 665 }
 666
 667 static inline struct device *add_child(unsigned mod_no, const char *name,
 668                 void *pdata, unsigned pdata_len,
 669                 bool can_wakeup, int irq0, int irq1)
 670 {
 671         return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
 672                 can_wakeup, irq0, irq1);
 673 }
 674
 675 static struct device *
 676 add_regulator_linked(int num, struct regulator_init_data *pdata,
 677                 struct regulator_consumer_supply *consumers,
 678                 unsigned num_consumers, unsigned long features)
 679 {
 680         struct twl_regulator_driver_data drv_data;
 681
 682         /* regulator framework demands init_data ... */
 683         if (!pdata)
 684                 return NULL;
 685
 686         if (consumers) {
 687                 pdata->consumer_supplies = consumers;
 688                 pdata->num_consumer_supplies = num_consumers;
 689         }
 690
 691         if (pdata->driver_data) {
 692                 /* If we have existing drv_data, just add the flags */
 693                 struct twl_regulator_driver_data *tmp;
 694                 tmp = pdata->driver_data;
 695                 tmp->features |= features;
 696         } else {
 697                 /* add new driver data struct, used only during init */
 698                 drv_data.features = features;
 699                 drv_data.set_voltage = NULL;
 700                 drv_data.get_voltage = NULL;
 701                 drv_data.data = NULL;
 702                 pdata->driver_data = &drv_data;
 703         }
 704
 705         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 706         return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
 707                 pdata, sizeof(*pdata), false, 0, 0);
 708 }
 709
 710 static struct device *
 711 add_regulator(int num, struct regulator_init_data *pdata,
 712                 unsigned long features)
 713 {
 714         return add_regulator_linked(num, pdata, NULL, 0, features);
 715 }
 716
 717 /*
 718  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 719  * for the PIH, and the next are for the PWR_INT SIH, since
 720  * that's how twl_init_irq() sets things up.
 721  */
 722
 723 static int
 724 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 725                 unsigned long features)
 726 {
 727         struct device   *child;
 728
 729         if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
 730                 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
 731                                 pdata->gpio, sizeof(*pdata->gpio),
 732                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 733                 if (IS_ERR(child))
 734                         return PTR_ERR(child);
 735         }
 736
 737         if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
 738                 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
 739                                 pdata->keypad, sizeof(*pdata->keypad),
 740                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 741                 if (IS_ERR(child))
 742                         return PTR_ERR(child);
 743         }
 744
 745         if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
 746             twl_class_is_4030()) {
 747                 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
 748                                 pdata->madc, sizeof(*pdata->madc),
 749                                 true, irq_base + MADC_INTR_OFFSET, 0);
 750                 if (IS_ERR(child))
 751                         return PTR_ERR(child);
 752         }
 753
 754         if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
 755                 /*
 756                  * REVISIT platform_data here currently might expose the
 757                  * "msecure" line ... but for now we just expect board
 758                  * setup to tell the chip "it's always ok to SET_TIME".
 759                  * Eventually, Linux might become more aware of such
 760                  * HW security concerns, and "least privilege".
 761                  */
 762                 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
 763                                 true, irq_base + RTC_INTR_OFFSET, 0);
 764                 if (IS_ERR(child))
 765                         return PTR_ERR(child);
 766         }
 767
 768         if (IS_ENABLED(CONFIG_PWM_TWL)) {
 769                 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
 770                                   false, 0, 0);
 771                 if (IS_ERR(child))
 772                         return PTR_ERR(child);
 773         }
 774
 775         if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
 776                 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
 777                                   false, 0, 0);
 778                 if (IS_ERR(child))
 779                         return PTR_ERR(child);
 780         }
 781
 782         if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
 783             twl_class_is_4030()) {
 784
 785                 static struct regulator_consumer_supply usb1v5 = {
 786                         .supply =       "usb1v5",
 787                 };
 788                 static struct regulator_consumer_supply usb1v8 = {
 789                         .supply =       "usb1v8",
 790                 };
 791                 static struct regulator_consumer_supply usb3v1[] = {
 792                         { .supply =     "usb3v1" },
 793                         { .supply =     "bci3v1" },
 794                 };
 795
 796         /* First add the regulators so that they can be used by transceiver */
 797                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 798                         /* this is a template that gets copied */
 799                         struct regulator_init_data usb_fixed = {
 800                                 .constraints.valid_modes_mask =
 801                                         REGULATOR_MODE_NORMAL
 802                                         | REGULATOR_MODE_STANDBY,
 803                                 .constraints.valid_ops_mask =
 804                                         REGULATOR_CHANGE_MODE
 805                                         | REGULATOR_CHANGE_STATUS,
 806                         };
 807
 808                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 809                                                       &usb_fixed, &usb1v5, 1,
 810                                                       features);
 811                         if (IS_ERR(child))
 812                                 return PTR_ERR(child);
 813
 814                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 815                                                       &usb_fixed, &usb1v8, 1,
 816                                                       features);
 817                         if (IS_ERR(child))
 818                                 return PTR_ERR(child);
 819
 820                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 821                                                       &usb_fixed, usb3v1, 2,
 822                                                       features);
 823                         if (IS_ERR(child))
 824                                 return PTR_ERR(child);
 825
 826                 }
 827
 828                 child = add_child(TWL_MODULE_USB, "twl4030_usb",
 829                                 pdata->usb, sizeof(*pdata->usb), true,
 830                                 /* irq0 = USB_PRES, irq1 = USB */
 831                                 irq_base + USB_PRES_INTR_OFFSET,
 832                                 irq_base + USB_INTR_OFFSET);
 833
 834                 if (IS_ERR(child))
 835                         return PTR_ERR(child);
 836
 837                 /* we need to connect regulators to this transceiver */
 838                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
 839                         usb1v5.dev_name = dev_name(child);
 840                         usb1v8.dev_name = dev_name(child);
 841                         usb3v1[0].dev_name = dev_name(child);
 842                 }
 843         }
 844
 845         if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
 846                 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
 847                                   0, false, 0, 0);
 848                 if (IS_ERR(child))
 849                         return PTR_ERR(child);
 850         }
 851
 852         if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
 853                 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
 854                                   NULL, 0, true, irq_base + 8 + 0, 0);
 855                 if (IS_ERR(child))
 856                         return PTR_ERR(child);
 857         }
 858
 859         if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
 860             twl_class_is_4030()) {
 861                 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
 862                                 pdata->audio, sizeof(*pdata->audio),
 863                                 false, 0, 0);
 864                 if (IS_ERR(child))
 865                         return PTR_ERR(child);
 866         }
 867
 868         /* twl4030 regulators */
 869         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
 870                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 871                                         features);
 872                 if (IS_ERR(child))
 873                         return PTR_ERR(child);
 874
 875                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 876                                         features);
 877                 if (IS_ERR(child))
 878                         return PTR_ERR(child);
 879
 880                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 881                                         features);
 882                 if (IS_ERR(child))
 883                         return PTR_ERR(child);
 884
 885                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 886                                         features);
 887                 if (IS_ERR(child))
 888                         return PTR_ERR(child);
 889
 890                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 891                                         features);
 892                 if (IS_ERR(child))
 893                         return PTR_ERR(child);
 894
 895                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 896                                         features);
 897                 if (IS_ERR(child))
 898                         return PTR_ERR(child);
 899
 900                 child = add_regulator((features & TWL4030_VAUX2)
 901                                         ? TWL4030_REG_VAUX2_4030
 902                                         : TWL4030_REG_VAUX2,
 903                                 pdata->vaux2, features);
 904                 if (IS_ERR(child))
 905                         return PTR_ERR(child);
 906
 907                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 908                                         features);
 909                 if (IS_ERR(child))
 910                         return PTR_ERR(child);
 911
 912                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 913                                         features);
 914                 if (IS_ERR(child))
 915                         return PTR_ERR(child);
 916
 917                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 918                                         features);
 919                 if (IS_ERR(child))
 920                         return PTR_ERR(child);
 921         }
 922
 923         /* maybe add LDOs that are omitted on cost-reduced parts */
 924         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
 925           && twl_class_is_4030()) {
 926                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 927                                         features);
 928                 if (IS_ERR(child))
 929                         return PTR_ERR(child);
 930
 931                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 932                                         features);
 933                 if (IS_ERR(child))
 934                         return PTR_ERR(child);
 935
 936                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 937                                         features);
 938                 if (IS_ERR(child))
 939                         return PTR_ERR(child);
 940
 941                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 942                                         features);
 943                 if (IS_ERR(child))
 944                         return PTR_ERR(child);
 945
 946                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 947                                         features);
 948                 if (IS_ERR(child))
 949                         return PTR_ERR(child);
 950
 951                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 952                                         features);
 953                 if (IS_ERR(child))
 954                         return PTR_ERR(child);
 955         }
 956
 957         if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
 958                         !(features & (TPS_SUBSET | TWL5031))) {
 959                 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
 960                                 pdata->bci, sizeof(*pdata->bci), false,
 961                                 /* irq0 = CHG_PRES, irq1 = BCI */
 962                                 irq_base + BCI_PRES_INTR_OFFSET,
 963                                 irq_base + BCI_INTR_OFFSET);
 964                 if (IS_ERR(child))
 965                         return PTR_ERR(child);
 966         }
 967
 968         if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) {
 969                 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power",
 970                                   pdata->power, sizeof(*pdata->power), false,
 971                                   0, 0);
 972                 if (IS_ERR(child))
 973                         return PTR_ERR(child);
 974         }
 975
 976         return 0;
 977 }
 978
 979 /*----------------------------------------------------------------------*/
 980
 981 /*
 982  * These three functions initialize the on-chip clock framework,
 983  * letting it generate the right frequencies for USB, MADC, and
 984  * other purposes.
 985  */
 986 static inline int __init protect_pm_master(void)
 987 {
 988         int e = 0;
 989
 990         e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
 991                              TWL4030_PM_MASTER_PROTECT_KEY);
 992         return e;
 993 }
 994
 995 static inline int __init unprotect_pm_master(void)
 996 {
 997         int e = 0;
 998
 999         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
1000                               TWL4030_PM_MASTER_PROTECT_KEY);
1001         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
1002                               TWL4030_PM_MASTER_PROTECT_KEY);
1003
1004         return e;
1005 }
1006
1007 static void clocks_init(struct device *dev,
1008                         struct twl4030_clock_init_data *clock)
1009 {
1010         int e = 0;
1011         struct clk *osc;
1012         u32 rate;
1013         u8 ctrl = HFCLK_FREQ_26_MHZ;
1014
1015         osc = clk_get(dev, "fck");
1016         if (IS_ERR(osc)) {
1017                 printk(KERN_WARNING "Skipping twl internal clock init and "
1018                                 "using bootloader value (unknown osc rate)\n");
1019                 return;
1020         }
1021
1022         rate = clk_get_rate(osc);
1023         clk_put(osc);
1024
1025         switch (rate) {
1026         case 19200000:
1027                 ctrl = HFCLK_FREQ_19p2_MHZ;
1028                 break;
1029         case 26000000:
1030                 ctrl = HFCLK_FREQ_26_MHZ;
1031                 break;
1032         case 38400000:
1033                 ctrl = HFCLK_FREQ_38p4_MHZ;
1034                 break;
1035         }
1036
1037         ctrl |= HIGH_PERF_SQ;
1038         if (clock && clock->ck32k_lowpwr_enable)
1039                 ctrl |= CK32K_LOWPWR_EN;
1040
1041         e |= unprotect_pm_master();
1042         /* effect->MADC+USB ck en */
1043         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1044         e |= protect_pm_master();
1045
1046         if (e < 0)
1047                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1048 }
1049
1050 /*----------------------------------------------------------------------*/
1051
1052
1053 static int twl_remove(struct i2c_client *client)
1054 {
1055         unsigned i, num_slaves;
1056         int status;
1057
1058         if (twl_class_is_4030())
1059                 status = twl4030_exit_irq();
1060         else
1061                 status = twl6030_exit_irq();
1062
1063         if (status < 0)
1064                 return status;
1065
1066         num_slaves = twl_get_num_slaves();
1067         for (i = 0; i < num_slaves; i++) {
1068                 struct twl_client       *twl = &twl_priv->twl_modules[i];
1069
1070                 if (twl->client && twl->client != client)
1071                         i2c_unregister_device(twl->client);
1072                 twl->client = NULL;
1073         }
1074         twl_priv->ready = false;
1075         return 0;
1076 }
1077
1078 static struct of_dev_auxdata twl_auxdata_lookup[] = {
1079         OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
1080         { /* sentinel */ },
1081 };
1082
1083 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1084 static int
1085 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1086 {
1087         struct twl4030_platform_data    *pdata = dev_get_platdata(&client->dev);
1088         struct device_node              *node = client->dev.of_node;
1089         struct platform_device          *pdev;
1090         const struct regmap_config      *twl_regmap_config;
1091         int                             irq_base = 0;
1092         int                             status;
1093         unsigned                        i, num_slaves;
1094
1095         if (!node && !pdata) {
1096                 dev_err(&client->dev, "no platform data\n");
1097                 return -EINVAL;
1098         }
1099
1100         if (twl_priv) {
1101                 dev_dbg(&client->dev, "only one instance of %s allowed\n",
1102                         DRIVER_NAME);
1103                 return -EBUSY;
1104         }
1105
1106         pdev = platform_device_alloc(DRIVER_NAME, -1);
1107         if (!pdev) {
1108                 dev_err(&client->dev, "can't alloc pdev\n");
1109                 return -ENOMEM;
1110         }
1111
1112         status = platform_device_add(pdev);
1113         if (status) {
1114                 platform_device_put(pdev);
1115                 return status;
1116         }
1117
1118         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1119                 dev_dbg(&client->dev, "can't talk I2C?\n");
1120                 status = -EIO;
1121                 goto free;
1122         }
1123
1124         twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
1125                                 GFP_KERNEL);
1126         if (!twl_priv) {
1127                 status = -ENOMEM;
1128                 goto free;
1129         }
1130
1131         if ((id->driver_data) & TWL6030_CLASS) {
1132                 twl_priv->twl_id = TWL6030_CLASS_ID;
1133                 twl_priv->twl_map = &twl6030_map[0];
1134                 /* The charger base address is different in twl6032 */
1135                 if ((id->driver_data) & TWL6032_SUBCLASS)
1136                         twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base =
1137                                                         TWL6032_BASEADD_CHARGER;
1138                 twl_regmap_config = twl6030_regmap_config;
1139         } else {
1140                 twl_priv->twl_id = TWL4030_CLASS_ID;
1141                 twl_priv->twl_map = &twl4030_map[0];
1142                 twl_regmap_config = twl4030_regmap_config;
1143         }
1144
1145         num_slaves = twl_get_num_slaves();
1146         twl_priv->twl_modules = devm_kzalloc(&client->dev,
1147                                          sizeof(struct twl_client) * num_slaves,
1148                                          GFP_KERNEL);
1149         if (!twl_priv->twl_modules) {
1150                 status = -ENOMEM;
1151                 goto free;
1152         }
1153
1154         for (i = 0; i < num_slaves; i++) {
1155                 struct twl_client *twl = &twl_priv->twl_modules[i];
1156
1157                 if (i == 0) {
1158                         twl->client = client;
1159                 } else {
1160                         twl->client = i2c_new_dummy(client->adapter,
1161                                                     client->addr + i);
1162                         if (!twl->client) {
1163                                 dev_err(&client->dev,
1164                                         "can't attach client %d\n", i);
1165                                 status = -ENOMEM;
1166                                 goto fail;
1167                         }
1168                 }
1169
1170                 twl->regmap = devm_regmap_init_i2c(twl->client,
1171                                                    &twl_regmap_config[i]);
1172                 if (IS_ERR(twl->regmap)) {
1173                         status = PTR_ERR(twl->regmap);
1174                         dev_err(&client->dev,
1175                                 "Failed to allocate regmap %d, err: %d\n", i,
1176                                 status);
1177                         goto fail;
1178                 }
1179         }
1180
1181         twl_priv->ready = true;
1182
1183         /* setup clock framework */
1184         clocks_init(&pdev->dev, pdata ? pdata->clock : NULL);
1185
1186         /* read TWL IDCODE Register */
1187         if (twl_class_is_4030()) {
1188                 status = twl_read_idcode_register();
1189                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1190         }
1191
1192         /* Maybe init the T2 Interrupt subsystem */
1193         if (client->irq) {
1194                 if (twl_class_is_4030()) {
1195                         twl4030_init_chip_irq(id->name);
1196                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1197                 } else {
1198                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1199                 }
1200
1201                 if (irq_base < 0) {
1202                         status = irq_base;
1203                         goto fail;
1204                 }
1205         }
1206
1207         /*
1208          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1209          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1210          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1211          *
1212          * Also, always enable SmartReflex bit as that's needed for omaps to
1213          * to do anything over I2C4 for voltage scaling even if SmartReflex
1214          * is disabled. Without the SmartReflex bit omap sys_clkreq idle
1215          * signal will never trigger for retention idle.
1216          */
1217         if (twl_class_is_4030()) {
1218                 u8 temp;
1219
1220                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1221                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1222                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1223                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1224
1225                 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
1226                                 TWL4030_DCDC_GLOBAL_CFG);
1227                 temp |= SMARTREFLEX_ENABLE;
1228                 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
1229                                  TWL4030_DCDC_GLOBAL_CFG);
1230         }
1231
1232         if (node) {
1233                 if (pdata)
1234                         twl_auxdata_lookup[0].platform_data = pdata->gpio;
1235                 status = of_platform_populate(node, NULL, twl_auxdata_lookup,
1236                                               &client->dev);
1237         } else {
1238                 status = add_children(pdata, irq_base, id->driver_data);
1239         }
1240
1241 fail:
1242         if (status < 0)
1243                 twl_remove(client);
1244 free:
1245         if (status < 0)
1246                 platform_device_unregister(pdev);
1247
1248         return status;
1249 }
1250
1251 static const struct i2c_device_id twl_ids[] = {
1252         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1253         { "twl5030", 0 },               /* T2 updated */
1254         { "twl5031", TWL5031 },         /* TWL5030 updated */
1255         { "tps65950", 0 },              /* catalog version of twl5030 */
1256         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1257         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1258         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1259                                            and vibrator. Charger in USB module*/
1260         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1261         { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
1262         { /* end of list */ },
1263 };
1264 MODULE_DEVICE_TABLE(i2c, twl_ids);
1265
1266 /* One Client Driver , 4 Clients */
1267 static struct i2c_driver twl_driver = {
1268         .driver.name    = DRIVER_NAME,
1269         .id_table       = twl_ids,
1270         .probe          = twl_probe,
1271         .remove         = twl_remove,
1272 };
1273
1274 module_i2c_driver(twl_driver);
1275
1276 MODULE_AUTHOR("Texas Instruments, Inc.");
1277 MODULE_DESCRIPTION("I2C Core interface for TWL");
1278 MODULE_LICENSE("GPL");