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/platform_device.h>
  34 #include <linux/regmap.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/mfd/twl.h>
  48
  49 /* Register descriptions for audio */
  50 #include <linux/mfd/twl4030-audio.h>
  51
  52 #include "twl-core.h"
  53
  54 /*
  55  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  56  * Management and System Companion Device" chips originally designed for
  57  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  58  * often at around 3 Mbit/sec, including for interrupt handling.
  59  *
  60  * This driver core provides genirq support for the interrupts emitted,
  61  * by the various modules, and exports register access primitives.
  62  *
  63  * FIXME this driver currently requires use of the first interrupt line
  64  * (and associated registers).
  65  */
  66
  67 #define DRIVER_NAME                     "twl"
  68
  69 /* Triton Core internal information (BEGIN) */
  70
  71 /* Base Address defns for twl4030_map[] */
  72
  73 /* subchip/slave 0 - USB ID */
  74 #define TWL4030_BASEADD_USB             0x0000
  75
  76 /* subchip/slave 1 - AUD ID */
  77 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
  78 #define TWL4030_BASEADD_GPIO            0x0098
  79 #define TWL4030_BASEADD_INTBR           0x0085
  80 #define TWL4030_BASEADD_PIH             0x0080
  81 #define TWL4030_BASEADD_TEST            0x004C
  82
  83 /* subchip/slave 2 - AUX ID */
  84 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
  85 #define TWL4030_BASEADD_LED             0x00EE
  86 #define TWL4030_BASEADD_MADC            0x0000
  87 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
  88 #define TWL4030_BASEADD_PRECHARGE       0x00AA
  89 #define TWL4030_BASEADD_PWM             0x00F8
  90 #define TWL4030_BASEADD_KEYPAD          0x00D2
  91
  92 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
  93 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
  94                                                   one */
  95
  96 /* subchip/slave 3 - POWER ID */
  97 #define TWL4030_BASEADD_BACKUP          0x0014
  98 #define TWL4030_BASEADD_INT             0x002E
  99 #define TWL4030_BASEADD_PM_MASTER       0x0036
 100
 101 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 102 #define TWL4030_DCDC_GLOBAL_CFG         0x06
 103 #define SMARTREFLEX_ENABLE              BIT(3)
 104
 105 #define TWL4030_BASEADD_RTC             0x001C
 106 #define TWL4030_BASEADD_SECURED_REG     0x0000
 107
 108 /* Triton Core internal information (END) */
 109
 110
 111 /* subchip/slave 0 0x48 - POWER */
 112 #define TWL6030_BASEADD_RTC             0x0000
 113 #define TWL6030_BASEADD_SECURED_REG     0x0017
 114 #define TWL6030_BASEADD_PM_MASTER       0x001F
 115 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 116 #define TWL6030_BASEADD_PM_MISC         0x00E2
 117 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 118
 119 /* subchip/slave 1 0x49 - FEATURE */
 120 #define TWL6030_BASEADD_USB             0x0000
 121 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 122 #define TWL6030_BASEADD_AUX             0x0090
 123 #define TWL6030_BASEADD_PWM             0x00BA
 124 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 125 #define TWL6030_BASEADD_PIH             0x00D0
 126 #define TWL6030_BASEADD_CHARGER         0x00E0
 127 #define TWL6032_BASEADD_CHARGER         0x00DA
 128 #define TWL6030_BASEADD_LED             0x00F4
 129
 130 /* subchip/slave 2 0x4A - DFT */
 131 #define TWL6030_BASEADD_DIEID           0x00C0
 132
 133 /* subchip/slave 3 0x4B - AUDIO */
 134 #define TWL6030_BASEADD_AUDIO           0x0000
 135 #define TWL6030_BASEADD_RSV             0x0000
 136 #define TWL6030_BASEADD_ZERO            0x0000
 137
 138 /* Few power values */
 139 #define R_CFG_BOOT                      0x05
 140
 141 /* some fields in R_CFG_BOOT */
 142 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 143 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 144 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 145 #define HIGH_PERF_SQ                    (1 << 3)
 146 #define CK32K_LOWPWR_EN                 (1 << 7)
 147
 148 /*----------------------------------------------------------------------*/
 149
 150 /* Structure for each TWL4030/TWL6030 Slave */
 151 struct twl_client {
 152         struct i2c_client *client;
 153         struct regmap *regmap;
 154 };
 155
 156 /* mapping the module id to slave id and base address */
 157 struct twl_mapping {
 158         unsigned char sid;      /* Slave ID */
 159         unsigned char base;     /* base address */
 160 };
 161
 162 struct twl_private {
 163         bool ready; /* The core driver is ready to be used */
 164         u32 twl_idcode; /* TWL IDCODE Register value */
 165         unsigned int twl_id;
 166
 167         struct twl_mapping *twl_map;
 168         struct twl_client *twl_modules;
 169 };
 170
 171 static struct twl_private *twl_priv;
 172
 173 static struct twl_mapping twl4030_map[] = {
 174         /*
 175          * NOTE:  don't change this table without updating the
 176          * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
 177          * so they continue to match the order in this table.
 178          */
 179
 180         /* Common IPs */
 181         { 0, TWL4030_BASEADD_USB },
 182         { 1, TWL4030_BASEADD_PIH },
 183         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 184         { 3, TWL4030_BASEADD_PM_MASTER },
 185         { 3, TWL4030_BASEADD_PM_RECEIVER },
 186
 187         { 3, TWL4030_BASEADD_RTC },
 188         { 2, TWL4030_BASEADD_PWM },
 189         { 2, TWL4030_BASEADD_LED },
 190         { 3, TWL4030_BASEADD_SECURED_REG },
 191
 192         /* TWL4030 specific IPs */
 193         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 194         { 1, TWL4030_BASEADD_GPIO },
 195         { 1, TWL4030_BASEADD_INTBR },
 196         { 1, TWL4030_BASEADD_TEST },
 197         { 2, TWL4030_BASEADD_KEYPAD },
 198
 199         { 2, TWL4030_BASEADD_MADC },
 200         { 2, TWL4030_BASEADD_INTERRUPTS },
 201         { 2, TWL4030_BASEADD_PRECHARGE },
 202         { 3, TWL4030_BASEADD_BACKUP },
 203         { 3, TWL4030_BASEADD_INT },
 204
 205         { 2, TWL5031_BASEADD_ACCESSORY },
 206         { 2, TWL5031_BASEADD_INTERRUPTS },
 207 };
 208
 209 static const struct reg_default twl4030_49_defaults[] = {
 210         /* Audio Registers */
 211         { 0x01, 0x00}, /* CODEC_MODE    */
 212         { 0x02, 0x00}, /* OPTION        */
 213         /* 0x03  Unused */
 214         { 0x04, 0x00}, /* MICBIAS_CTL   */
 215         { 0x05, 0x00}, /* ANAMICL       */
 216         { 0x06, 0x00}, /* ANAMICR       */
 217         { 0x07, 0x00}, /* AVADC_CTL     */
 218         { 0x08, 0x00}, /* ADCMICSEL     */
 219         { 0x09, 0x00}, /* DIGMIXING     */
 220         { 0x0a, 0x0f}, /* ATXL1PGA      */
 221         { 0x0b, 0x0f}, /* ATXR1PGA      */
 222         { 0x0c, 0x0f}, /* AVTXL2PGA     */
 223         { 0x0d, 0x0f}, /* AVTXR2PGA     */
 224         { 0x0e, 0x00}, /* AUDIO_IF      */
 225         { 0x0f, 0x00}, /* VOICE_IF      */
 226         { 0x10, 0x3f}, /* ARXR1PGA      */
 227         { 0x11, 0x3f}, /* ARXL1PGA      */
 228         { 0x12, 0x3f}, /* ARXR2PGA      */
 229         { 0x13, 0x3f}, /* ARXL2PGA      */
 230         { 0x14, 0x25}, /* VRXPGA        */
 231         { 0x15, 0x00}, /* VSTPGA        */
 232         { 0x16, 0x00}, /* VRX2ARXPGA    */
 233         { 0x17, 0x00}, /* AVDAC_CTL     */
 234         { 0x18, 0x00}, /* ARX2VTXPGA    */
 235         { 0x19, 0x32}, /* ARXL1_APGA_CTL*/
 236         { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
 237         { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
 238         { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
 239         { 0x1d, 0x00}, /* ATX2ARXPGA    */
 240         { 0x1e, 0x00}, /* BT_IF         */
 241         { 0x1f, 0x55}, /* BTPGA         */
 242         { 0x20, 0x00}, /* BTSTPGA       */
 243         { 0x21, 0x00}, /* EAR_CTL       */
 244         { 0x22, 0x00}, /* HS_SEL        */
 245         { 0x23, 0x00}, /* HS_GAIN_SET   */
 246         { 0x24, 0x00}, /* HS_POPN_SET   */
 247         { 0x25, 0x00}, /* PREDL_CTL     */
 248         { 0x26, 0x00}, /* PREDR_CTL     */
 249         { 0x27, 0x00}, /* PRECKL_CTL    */
 250         { 0x28, 0x00}, /* PRECKR_CTL    */
 251         { 0x29, 0x00}, /* HFL_CTL       */
 252         { 0x2a, 0x00}, /* HFR_CTL       */
 253         { 0x2b, 0x05}, /* ALC_CTL       */
 254         { 0x2c, 0x00}, /* ALC_SET1      */
 255         { 0x2d, 0x00}, /* ALC_SET2      */
 256         { 0x2e, 0x00}, /* BOOST_CTL     */
 257         { 0x2f, 0x00}, /* SOFTVOL_CTL   */
 258         { 0x30, 0x13}, /* DTMF_FREQSEL  */
 259         { 0x31, 0x00}, /* DTMF_TONEXT1H */
 260         { 0x32, 0x00}, /* DTMF_TONEXT1L */
 261         { 0x33, 0x00}, /* DTMF_TONEXT2H */
 262         { 0x34, 0x00}, /* DTMF_TONEXT2L */
 263         { 0x35, 0x79}, /* DTMF_TONOFF   */
 264         { 0x36, 0x11}, /* DTMF_WANONOFF */
 265         { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
 266         { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
 267         { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
 268         { 0x3a, 0x06}, /* APLL_CTL */
 269         { 0x3b, 0x00}, /* DTMF_CTL */
 270         { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
 271         { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
 272         { 0x3e, 0x00}, /* MISC_SET_1 */
 273         { 0x3f, 0x00}, /* PCMBTMUX */
 274         /* 0x40 - 0x42  Unused */
 275         { 0x43, 0x00}, /* RX_PATH_SEL */
 276         { 0x44, 0x32}, /* VDL_APGA_CTL */
 277         { 0x45, 0x00}, /* VIBRA_CTL */
 278         { 0x46, 0x00}, /* VIBRA_SET */
 279         { 0x47, 0x00}, /* VIBRA_PWM_SET */
 280         { 0x48, 0x00}, /* ANAMIC_GAIN   */
 281         { 0x49, 0x00}, /* MISC_SET_2    */
 282         /* End of Audio Registers */
 283 };
 284
 285 static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
 286 {
 287         switch (reg) {
 288         case 0x00:
 289         case 0x03:
 290         case 0x40:
 291         case 0x41:
 292         case 0x42:
 293                 return false;
 294         default:
 295                 return true;
 296         }
 297 }
 298
 299 static const struct regmap_range twl4030_49_volatile_ranges[] = {
 300         regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
 301 };
 302
 303 static const struct regmap_access_table twl4030_49_volatile_table = {
 304         .yes_ranges = twl4030_49_volatile_ranges,
 305         .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
 306 };
 307
 308 static const struct regmap_config twl4030_regmap_config[4] = {
 309         {
 310                 /* Address 0x48 */
 311                 .reg_bits = 8,
 312                 .val_bits = 8,
 313                 .max_register = 0xff,
 314         },
 315         {
 316                 /* Address 0x49 */
 317                 .reg_bits = 8,
 318                 .val_bits = 8,
 319                 .max_register = 0xff,
 320
 321                 .readable_reg = twl4030_49_nop_reg,
 322                 .writeable_reg = twl4030_49_nop_reg,
 323
 324                 .volatile_table = &twl4030_49_volatile_table,
 325
 326                 .reg_defaults = twl4030_49_defaults,
 327                 .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
 328                 .cache_type = REGCACHE_RBTREE,
 329         },
 330         {
 331                 /* Address 0x4a */
 332                 .reg_bits = 8,
 333                 .val_bits = 8,
 334                 .max_register = 0xff,
 335         },
 336         {
 337                 /* Address 0x4b */
 338                 .reg_bits = 8,
 339                 .val_bits = 8,
 340                 .max_register = 0xff,
 341         },
 342 };
 343
 344 static struct twl_mapping twl6030_map[] = {
 345         /*
 346          * NOTE:  don't change this table without updating the
 347          * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
 348          * so they continue to match the order in this table.
 349          */
 350
 351         /* Common IPs */
 352         { 1, TWL6030_BASEADD_USB },
 353         { 1, TWL6030_BASEADD_PIH },
 354         { 1, TWL6030_BASEADD_CHARGER },
 355         { 0, TWL6030_BASEADD_PM_MASTER },
 356         { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
 357
 358         { 0, TWL6030_BASEADD_RTC },
 359         { 1, TWL6030_BASEADD_PWM },
 360         { 1, TWL6030_BASEADD_LED },
 361         { 0, TWL6030_BASEADD_SECURED_REG },
 362
 363         /* TWL6030 specific IPs */
 364         { 0, TWL6030_BASEADD_ZERO },
 365         { 1, TWL6030_BASEADD_ZERO },
 366         { 2, TWL6030_BASEADD_ZERO },
 367         { 1, TWL6030_BASEADD_GPADC_CTRL },
 368         { 1, TWL6030_BASEADD_GASGAUGE },
 369 };
 370
 371 static const struct regmap_config twl6030_regmap_config[3] = {
 372         {
 373                 /* Address 0x48 */
 374                 .reg_bits = 8,
 375                 .val_bits = 8,
 376                 .max_register = 0xff,
 377         },
 378         {
 379                 /* Address 0x49 */
 380                 .reg_bits = 8,
 381                 .val_bits = 8,
 382                 .max_register = 0xff,
 383         },
 384         {
 385                 /* Address 0x4a */
 386                 .reg_bits = 8,
 387                 .val_bits = 8,
 388                 .max_register = 0xff,
 389         },
 390 };
 391
 392 /*----------------------------------------------------------------------*/
 393
 394 static inline int twl_get_num_slaves(void)
 395 {
 396         if (twl_class_is_4030())
 397                 return 4; /* TWL4030 class have four slave address */
 398         else
 399                 return 3; /* TWL6030 class have three slave address */
 400 }
 401
 402 static inline int twl_get_last_module(void)
 403 {
 404         if (twl_class_is_4030())
 405                 return TWL4030_MODULE_LAST;
 406         else
 407                 return TWL6030_MODULE_LAST;
 408 }
 409
 410 /* Exported Functions */
 411
 412 unsigned int twl_rev(void)
 413 {
 414         return twl_priv ? twl_priv->twl_id : 0;
 415 }
 416 EXPORT_SYMBOL(twl_rev);
 417
 418 /**
 419  * twl_get_regmap - Get the regmap associated with the given module
 420  * @mod_no: module number
 421  *
 422  * Returns the regmap pointer or NULL in case of failure.
 423  */
 424 static struct regmap *twl_get_regmap(u8 mod_no)
 425 {
 426         int sid;
 427         struct twl_client *twl;
 428
 429         if (unlikely(!twl_priv || !twl_priv->ready)) {
 430                 pr_err("%s: not initialized\n", DRIVER_NAME);
 431                 return NULL;
 432         }
 433         if (unlikely(mod_no >= twl_get_last_module())) {
 434                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 435                 return NULL;
 436         }
 437
 438         sid = twl_priv->twl_map[mod_no].sid;
 439         twl = &twl_priv->twl_modules[sid];
 440
 441         return twl->regmap;
 442 }
 443
 444 /**
 445  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 446  * @mod_no: module number
 447  * @value: an array of num_bytes+1 containing data to write
 448  * @reg: register address (just offset will do)
 449  * @num_bytes: number of bytes to transfer
 450  *
 451  * Returns 0 on success or else a negative error code.
 452  */
 453 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 454 {
 455         struct regmap *regmap = twl_get_regmap(mod_no);
 456         int ret;
 457
 458         if (!regmap)
 459                 return -EPERM;
 460
 461         ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
 462                                 value, num_bytes);
 463
 464         if (ret)
 465                 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
 466                        DRIVER_NAME, mod_no, reg, num_bytes);
 467
 468         return ret;
 469 }
 470 EXPORT_SYMBOL(twl_i2c_write);
 471
 472 /**
 473  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 474  * @mod_no: module number
 475  * @value: an array of num_bytes containing data to be read
 476  * @reg: register address (just offset will do)
 477  * @num_bytes: number of bytes to transfer
 478  *
 479  * Returns 0 on success or else a negative error code.
 480  */
 481 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 482 {
 483         struct regmap *regmap = twl_get_regmap(mod_no);
 484         int ret;
 485
 486         if (!regmap)
 487                 return -EPERM;
 488
 489         ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
 490                                value, num_bytes);
 491
 492         if (ret)
 493                 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
 494                        DRIVER_NAME, mod_no, reg, num_bytes);
 495
 496         return ret;
 497 }
 498 EXPORT_SYMBOL(twl_i2c_read);
 499
 500 /**
 501  * twl_regcache_bypass - Configure the regcache bypass for the regmap associated
 502  *                       with the module
 503  * @mod_no: module number
 504  * @enable: Regcache bypass state
 505  *
 506  * Returns 0 else failure.
 507  */
 508 int twl_set_regcache_bypass(u8 mod_no, bool enable)
 509 {
 510         struct regmap *regmap = twl_get_regmap(mod_no);
 511
 512         if (!regmap)
 513                 return -EPERM;
 514
 515         regcache_cache_bypass(regmap, enable);
 516
 517         return 0;
 518 }
 519 EXPORT_SYMBOL(twl_set_regcache_bypass);
 520
 521 /*----------------------------------------------------------------------*/
 522
 523 /**
 524  * twl_read_idcode_register - API to read the IDCODE register.
 525  *
 526  * Unlocks the IDCODE register and read the 32 bit value.
 527  */
 528 static int twl_read_idcode_register(void)
 529 {
 530         int err;
 531
 532         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 533                                                 REG_UNLOCK_TEST_REG);
 534         if (err) {
 535                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 536                 goto fail;
 537         }
 538
 539         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
 540                                                 REG_IDCODE_7_0, 4);
 541         if (err) {
 542                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 543                 goto fail;
 544         }
 545
 546         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 547         if (err)
 548                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 549 fail:
 550         return err;
 551 }
 552
 553 /**
 554  * twl_get_type - API to get TWL Si type.
 555  *
 556  * Api to get the TWL Si type from IDCODE value.
 557  */
 558 int twl_get_type(void)
 559 {
 560         return TWL_SIL_TYPE(twl_priv->twl_idcode);
 561 }
 562 EXPORT_SYMBOL_GPL(twl_get_type);
 563
 564 /**
 565  * twl_get_version - API to get TWL Si version.
 566  *
 567  * Api to get the TWL Si version from IDCODE value.
 568  */
 569 int twl_get_version(void)
 570 {
 571         return TWL_SIL_REV(twl_priv->twl_idcode);
 572 }
 573 EXPORT_SYMBOL_GPL(twl_get_version);
 574
 575 /**
 576  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
 577  *
 578  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
 579  */
 580 int twl_get_hfclk_rate(void)
 581 {
 582         u8 ctrl;
 583         int rate;
 584
 585         twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
 586
 587         switch (ctrl & 0x3) {
 588         case HFCLK_FREQ_19p2_MHZ:
 589                 rate = 19200000;
 590                 break;
 591         case HFCLK_FREQ_26_MHZ:
 592                 rate = 26000000;
 593                 break;
 594         case HFCLK_FREQ_38p4_MHZ:
 595                 rate = 38400000;
 596                 break;
 597         default:
 598                 pr_err("TWL4030: HFCLK is not configured\n");
 599                 rate = -EINVAL;
 600                 break;
 601         }
 602
 603         return rate;
 604 }
 605 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
 606
 607 static struct device *
 608 add_numbered_child(unsigned mod_no, const char *name, int num,
 609                 void *pdata, unsigned pdata_len,
 610                 bool can_wakeup, int irq0, int irq1)
 611 {
 612         struct platform_device  *pdev;
 613         struct twl_client       *twl;
 614         int                     status, sid;
 615
 616         if (unlikely(mod_no >= twl_get_last_module())) {
 617                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 618                 return ERR_PTR(-EPERM);
 619         }
 620         sid = twl_priv->twl_map[mod_no].sid;
 621         twl = &twl_priv->twl_modules[sid];
 622
 623         pdev = platform_device_alloc(name, num);
 624         if (!pdev)
 625                 return ERR_PTR(-ENOMEM);
 626
 627         pdev->dev.parent = &twl->client->dev;
 628
 629         if (pdata) {
 630                 status = platform_device_add_data(pdev, pdata, pdata_len);
 631                 if (status < 0) {
 632                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 633                         goto put_device;
 634                 }
 635         }
 636
 637         if (irq0) {
 638                 struct resource r[2] = {
 639                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 640                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 641                 };
 642
 643                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 644                 if (status < 0) {
 645                         dev_dbg(&pdev->dev, "can't add irqs\n");
 646                         goto put_device;
 647                 }
 648         }
 649
 650         status = platform_device_add(pdev);
 651         if (status)
 652                 goto put_device;
 653
 654         device_init_wakeup(&pdev->dev, can_wakeup);
 655
 656         return &pdev->dev;
 657
 658 put_device:
 659         platform_device_put(pdev);
 660         dev_err(&twl->client->dev, "failed to add device %s\n", name);
 661         return ERR_PTR(status);
 662 }
 663
 664 static inline struct device *add_child(unsigned mod_no, const char *name,
 665                 void *pdata, unsigned pdata_len,
 666                 bool can_wakeup, int irq0, int irq1)
 667 {
 668         return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
 669                 can_wakeup, irq0, irq1);
 670 }
 671
 672 static struct device *
 673 add_regulator_linked(int num, struct regulator_init_data *pdata,
 674                 struct regulator_consumer_supply *consumers,
 675                 unsigned num_consumers, unsigned long features)
 676 {
 677         struct twl_regulator_driver_data drv_data;
 678
 679         /* regulator framework demands init_data ... */
 680         if (!pdata)
 681                 return NULL;
 682
 683         if (consumers) {
 684                 pdata->consumer_supplies = consumers;
 685                 pdata->num_consumer_supplies = num_consumers;
 686         }
 687
 688         if (pdata->driver_data) {
 689                 /* If we have existing drv_data, just add the flags */
 690                 struct twl_regulator_driver_data *tmp;
 691                 tmp = pdata->driver_data;
 692                 tmp->features |= features;
 693         } else {
 694                 /* add new driver data struct, used only during init */
 695                 drv_data.features = features;
 696                 drv_data.set_voltage = NULL;
 697                 drv_data.get_voltage = NULL;
 698                 drv_data.data = NULL;
 699                 pdata->driver_data = &drv_data;
 700         }
 701
 702         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 703         return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
 704                 pdata, sizeof(*pdata), false, 0, 0);
 705 }
 706
 707 static struct device *
 708 add_regulator(int num, struct regulator_init_data *pdata,
 709                 unsigned long features)
 710 {
 711         return add_regulator_linked(num, pdata, NULL, 0, features);
 712 }
 713
 714 /*
 715  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 716  * for the PIH, and the next are for the PWR_INT SIH, since
 717  * that's how twl_init_irq() sets things up.
 718  */
 719
 720 static int
 721 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 722                 unsigned long features)
 723 {
 724         struct device   *child;
 725
 726         if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
 727                 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
 728                                 pdata->gpio, sizeof(*pdata->gpio),
 729                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 730                 if (IS_ERR(child))
 731                         return PTR_ERR(child);
 732         }
 733
 734         if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
 735                 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
 736                                 pdata->keypad, sizeof(*pdata->keypad),
 737                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 738                 if (IS_ERR(child))
 739                         return PTR_ERR(child);
 740         }
 741
 742         if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
 743             twl_class_is_4030()) {
 744                 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
 745                                 pdata->madc, sizeof(*pdata->madc),
 746                                 true, irq_base + MADC_INTR_OFFSET, 0);
 747                 if (IS_ERR(child))
 748                         return PTR_ERR(child);
 749         }
 750
 751         if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
 752                 /*
 753                  * REVISIT platform_data here currently might expose the
 754                  * "msecure" line ... but for now we just expect board
 755                  * setup to tell the chip "it's always ok to SET_TIME".
 756                  * Eventually, Linux might become more aware of such
 757                  * HW security concerns, and "least privilege".
 758                  */
 759                 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
 760                                 true, irq_base + RTC_INTR_OFFSET, 0);
 761                 if (IS_ERR(child))
 762                         return PTR_ERR(child);
 763         }
 764
 765         if (IS_ENABLED(CONFIG_PWM_TWL)) {
 766                 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
 767                                   false, 0, 0);
 768                 if (IS_ERR(child))
 769                         return PTR_ERR(child);
 770         }
 771
 772         if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
 773                 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
 774                                   false, 0, 0);
 775                 if (IS_ERR(child))
 776                         return PTR_ERR(child);
 777         }
 778
 779         if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
 780             twl_class_is_4030()) {
 781
 782                 static struct regulator_consumer_supply usb1v5 = {
 783                         .supply =       "usb1v5",
 784                 };
 785                 static struct regulator_consumer_supply usb1v8 = {
 786                         .supply =       "usb1v8",
 787                 };
 788                 static struct regulator_consumer_supply usb3v1 = {
 789                         .supply =       "usb3v1",
 790                 };
 791
 792         /* First add the regulators so that they can be used by transceiver */
 793                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 794                         /* this is a template that gets copied */
 795                         struct regulator_init_data usb_fixed = {
 796                                 .constraints.valid_modes_mask =
 797                                         REGULATOR_MODE_NORMAL
 798                                         | REGULATOR_MODE_STANDBY,
 799                                 .constraints.valid_ops_mask =
 800                                         REGULATOR_CHANGE_MODE
 801                                         | REGULATOR_CHANGE_STATUS,
 802                         };
 803
 804                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 805                                                       &usb_fixed, &usb1v5, 1,
 806                                                       features);
 807                         if (IS_ERR(child))
 808                                 return PTR_ERR(child);
 809
 810                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 811                                                       &usb_fixed, &usb1v8, 1,
 812                                                       features);
 813                         if (IS_ERR(child))
 814                                 return PTR_ERR(child);
 815
 816                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 817                                                       &usb_fixed, &usb3v1, 1,
 818                                                       features);
 819                         if (IS_ERR(child))
 820                                 return PTR_ERR(child);
 821
 822                 }
 823
 824                 child = add_child(TWL_MODULE_USB, "twl4030_usb",
 825                                 pdata->usb, sizeof(*pdata->usb), true,
 826                                 /* irq0 = USB_PRES, irq1 = USB */
 827                                 irq_base + USB_PRES_INTR_OFFSET,
 828                                 irq_base + USB_INTR_OFFSET);
 829
 830                 if (IS_ERR(child))
 831                         return PTR_ERR(child);
 832
 833                 /* we need to connect regulators to this transceiver */
 834                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
 835                         usb1v5.dev_name = dev_name(child);
 836                         usb1v8.dev_name = dev_name(child);
 837                         usb3v1.dev_name = dev_name(child);
 838                 }
 839         }
 840
 841         if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
 842                 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
 843                                   0, false, 0, 0);
 844                 if (IS_ERR(child))
 845                         return PTR_ERR(child);
 846         }
 847
 848         if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
 849                 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
 850                                   NULL, 0, true, irq_base + 8 + 0, 0);
 851                 if (IS_ERR(child))
 852                         return PTR_ERR(child);
 853         }
 854
 855         if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
 856             twl_class_is_4030()) {
 857                 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
 858                                 pdata->audio, sizeof(*pdata->audio),
 859                                 false, 0, 0);
 860                 if (IS_ERR(child))
 861                         return PTR_ERR(child);
 862         }
 863
 864         /* twl4030 regulators */
 865         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
 866                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 867                                         features);
 868                 if (IS_ERR(child))
 869                         return PTR_ERR(child);
 870
 871                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 872                                         features);
 873                 if (IS_ERR(child))
 874                         return PTR_ERR(child);
 875
 876                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 877                                         features);
 878                 if (IS_ERR(child))
 879                         return PTR_ERR(child);
 880
 881                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 882                                         features);
 883                 if (IS_ERR(child))
 884                         return PTR_ERR(child);
 885
 886                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 887                                         features);
 888                 if (IS_ERR(child))
 889                         return PTR_ERR(child);
 890
 891                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 892                                         features);
 893                 if (IS_ERR(child))
 894                         return PTR_ERR(child);
 895
 896                 child = add_regulator((features & TWL4030_VAUX2)
 897                                         ? TWL4030_REG_VAUX2_4030
 898                                         : TWL4030_REG_VAUX2,
 899                                 pdata->vaux2, features);
 900                 if (IS_ERR(child))
 901                         return PTR_ERR(child);
 902
 903                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 904                                         features);
 905                 if (IS_ERR(child))
 906                         return PTR_ERR(child);
 907
 908                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 909                                         features);
 910                 if (IS_ERR(child))
 911                         return PTR_ERR(child);
 912
 913                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 914                                         features);
 915                 if (IS_ERR(child))
 916                         return PTR_ERR(child);
 917         }
 918
 919         /* maybe add LDOs that are omitted on cost-reduced parts */
 920         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
 921           && twl_class_is_4030()) {
 922                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 923                                         features);
 924                 if (IS_ERR(child))
 925                         return PTR_ERR(child);
 926
 927                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 928                                         features);
 929                 if (IS_ERR(child))
 930                         return PTR_ERR(child);
 931
 932                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 933                                         features);
 934                 if (IS_ERR(child))
 935                         return PTR_ERR(child);
 936
 937                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 938                                         features);
 939                 if (IS_ERR(child))
 940                         return PTR_ERR(child);
 941
 942                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 943                                         features);
 944                 if (IS_ERR(child))
 945                         return PTR_ERR(child);
 946
 947                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 948                                         features);
 949                 if (IS_ERR(child))
 950                         return PTR_ERR(child);
 951         }
 952
 953         if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
 954                         !(features & (TPS_SUBSET | TWL5031))) {
 955                 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
 956                                 pdata->bci, sizeof(*pdata->bci), false,
 957                                 /* irq0 = CHG_PRES, irq1 = BCI */
 958                                 irq_base + BCI_PRES_INTR_OFFSET,
 959                                 irq_base + BCI_INTR_OFFSET);
 960                 if (IS_ERR(child))
 961                         return PTR_ERR(child);
 962         }
 963
 964         if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) {
 965                 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power",
 966                                   pdata->power, sizeof(*pdata->power), false,
 967                                   0, 0);
 968                 if (IS_ERR(child))
 969                         return PTR_ERR(child);
 970         }
 971
 972         return 0;
 973 }
 974
 975 /*----------------------------------------------------------------------*/
 976
 977 /*
 978  * These three functions initialize the on-chip clock framework,
 979  * letting it generate the right frequencies for USB, MADC, and
 980  * other purposes.
 981  */
 982 static inline int protect_pm_master(void)
 983 {
 984         int e = 0;
 985
 986         e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
 987                              TWL4030_PM_MASTER_PROTECT_KEY);
 988         return e;
 989 }
 990
 991 static inline int unprotect_pm_master(void)
 992 {
 993         int e = 0;
 994
 995         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
 996                               TWL4030_PM_MASTER_PROTECT_KEY);
 997         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
 998                               TWL4030_PM_MASTER_PROTECT_KEY);
 999
1000         return e;
1001 }
1002
1003 static void clocks_init(struct device *dev,
1004                         struct twl4030_clock_init_data *clock)
1005 {
1006         int e = 0;
1007         struct clk *osc;
1008         u32 rate;
1009         u8 ctrl = HFCLK_FREQ_26_MHZ;
1010
1011         osc = clk_get(dev, "fck");
1012         if (IS_ERR(osc)) {
1013                 printk(KERN_WARNING "Skipping twl internal clock init and "
1014                                 "using bootloader value (unknown osc rate)\n");
1015                 return;
1016         }
1017
1018         rate = clk_get_rate(osc);
1019         clk_put(osc);
1020
1021         switch (rate) {
1022         case 19200000:
1023                 ctrl = HFCLK_FREQ_19p2_MHZ;
1024                 break;
1025         case 26000000:
1026                 ctrl = HFCLK_FREQ_26_MHZ;
1027                 break;
1028         case 38400000:
1029                 ctrl = HFCLK_FREQ_38p4_MHZ;
1030                 break;
1031         }
1032
1033         ctrl |= HIGH_PERF_SQ;
1034         if (clock && clock->ck32k_lowpwr_enable)
1035                 ctrl |= CK32K_LOWPWR_EN;
1036
1037         e |= unprotect_pm_master();
1038         /* effect->MADC+USB ck en */
1039         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1040         e |= protect_pm_master();
1041
1042         if (e < 0)
1043                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1044 }
1045
1046 /*----------------------------------------------------------------------*/
1047
1048
1049 static int twl_remove(struct i2c_client *client)
1050 {
1051         unsigned i, num_slaves;
1052         int status;
1053
1054         if (twl_class_is_4030())
1055                 status = twl4030_exit_irq();
1056         else
1057                 status = twl6030_exit_irq();
1058
1059         if (status < 0)
1060                 return status;
1061
1062         num_slaves = twl_get_num_slaves();
1063         for (i = 0; i < num_slaves; i++) {
1064                 struct twl_client       *twl = &twl_priv->twl_modules[i];
1065
1066                 if (twl->client && twl->client != client)
1067                         i2c_unregister_device(twl->client);
1068                 twl->client = NULL;
1069         }
1070         twl_priv->ready = false;
1071         return 0;
1072 }
1073
1074 static struct of_dev_auxdata twl_auxdata_lookup[] = {
1075         OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
1076         { /* sentinel */ },
1077 };
1078
1079 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1080 static int
1081 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1082 {
1083         struct twl4030_platform_data    *pdata = dev_get_platdata(&client->dev);
1084         struct device_node              *node = client->dev.of_node;
1085         struct platform_device          *pdev;
1086         const struct regmap_config      *twl_regmap_config;
1087         int                             irq_base = 0;
1088         int                             status;
1089         unsigned                        i, num_slaves;
1090
1091         if (!node && !pdata) {
1092                 dev_err(&client->dev, "no platform data\n");
1093                 return -EINVAL;
1094         }
1095
1096         if (twl_priv) {
1097                 dev_dbg(&client->dev, "only one instance of %s allowed\n",
1098                         DRIVER_NAME);
1099                 return -EBUSY;
1100         }
1101
1102         pdev = platform_device_alloc(DRIVER_NAME, -1);
1103         if (!pdev) {
1104                 dev_err(&client->dev, "can't alloc pdev\n");
1105                 return -ENOMEM;
1106         }
1107
1108         status = platform_device_add(pdev);
1109         if (status) {
1110                 platform_device_put(pdev);
1111                 return status;
1112         }
1113
1114         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1115                 dev_dbg(&client->dev, "can't talk I2C?\n");
1116                 status = -EIO;
1117                 goto free;
1118         }
1119
1120         twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
1121                                 GFP_KERNEL);
1122         if (!twl_priv) {
1123                 status = -ENOMEM;
1124                 goto free;
1125         }
1126
1127         if ((id->driver_data) & TWL6030_CLASS) {
1128                 twl_priv->twl_id = TWL6030_CLASS_ID;
1129                 twl_priv->twl_map = &twl6030_map[0];
1130                 /* The charger base address is different in twl6032 */
1131                 if ((id->driver_data) & TWL6032_SUBCLASS)
1132                         twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base =
1133                                                         TWL6032_BASEADD_CHARGER;
1134                 twl_regmap_config = twl6030_regmap_config;
1135         } else {
1136                 twl_priv->twl_id = TWL4030_CLASS_ID;
1137                 twl_priv->twl_map = &twl4030_map[0];
1138                 twl_regmap_config = twl4030_regmap_config;
1139         }
1140
1141         num_slaves = twl_get_num_slaves();
1142         twl_priv->twl_modules = devm_kcalloc(&client->dev,
1143                                          num_slaves,
1144                                          sizeof(struct twl_client),
1145                                          GFP_KERNEL);
1146         if (!twl_priv->twl_modules) {
1147                 status = -ENOMEM;
1148                 goto free;
1149         }
1150
1151         for (i = 0; i < num_slaves; i++) {
1152                 struct twl_client *twl = &twl_priv->twl_modules[i];
1153
1154                 if (i == 0) {
1155                         twl->client = client;
1156                 } else {
1157                         twl->client = i2c_new_dummy(client->adapter,
1158                                                     client->addr + i);
1159                         if (!twl->client) {
1160                                 dev_err(&client->dev,
1161                                         "can't attach client %d\n", i);
1162                                 status = -ENOMEM;
1163                                 goto fail;
1164                         }
1165                 }
1166
1167                 twl->regmap = devm_regmap_init_i2c(twl->client,
1168                                                    &twl_regmap_config[i]);
1169                 if (IS_ERR(twl->regmap)) {
1170                         status = PTR_ERR(twl->regmap);
1171                         dev_err(&client->dev,
1172                                 "Failed to allocate regmap %d, err: %d\n", i,
1173                                 status);
1174                         goto fail;
1175                 }
1176         }
1177
1178         twl_priv->ready = true;
1179
1180         /* setup clock framework */
1181         clocks_init(&client->dev, pdata ? pdata->clock : NULL);
1182
1183         /* read TWL IDCODE Register */
1184         if (twl_class_is_4030()) {
1185                 status = twl_read_idcode_register();
1186                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1187         }
1188
1189         /* Maybe init the T2 Interrupt subsystem */
1190         if (client->irq) {
1191                 if (twl_class_is_4030()) {
1192                         twl4030_init_chip_irq(id->name);
1193                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1194                 } else {
1195                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1196                 }
1197
1198                 if (irq_base < 0) {
1199                         status = irq_base;
1200                         goto fail;
1201                 }
1202         }
1203
1204         /*
1205          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1206          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1207          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1208          *
1209          * Also, always enable SmartReflex bit as that's needed for omaps to
1210          * to do anything over I2C4 for voltage scaling even if SmartReflex
1211          * is disabled. Without the SmartReflex bit omap sys_clkreq idle
1212          * signal will never trigger for retention idle.
1213          */
1214         if (twl_class_is_4030()) {
1215                 u8 temp;
1216
1217                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1218                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1219                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1220                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1221
1222                 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
1223                                 TWL4030_DCDC_GLOBAL_CFG);
1224                 temp |= SMARTREFLEX_ENABLE;
1225                 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
1226                                  TWL4030_DCDC_GLOBAL_CFG);
1227         }
1228
1229         if (node) {
1230                 if (pdata)
1231                         twl_auxdata_lookup[0].platform_data = pdata->gpio;
1232                 status = of_platform_populate(node, NULL, twl_auxdata_lookup,
1233                                               &client->dev);
1234         } else {
1235                 status = add_children(pdata, irq_base, id->driver_data);
1236         }
1237
1238 fail:
1239         if (status < 0)
1240                 twl_remove(client);
1241 free:
1242         if (status < 0)
1243                 platform_device_unregister(pdev);
1244
1245         return status;
1246 }
1247
1248 static int __maybe_unused twl_suspend(struct device *dev)
1249 {
1250         struct i2c_client *client = to_i2c_client(dev);
1251
1252         if (client->irq)
1253                 disable_irq(client->irq);
1254
1255         return 0;
1256 }
1257
1258 static int __maybe_unused twl_resume(struct device *dev)
1259 {
1260         struct i2c_client *client = to_i2c_client(dev);
1261
1262         if (client->irq)
1263                 enable_irq(client->irq);
1264
1265         return 0;
1266 }
1267
1268 static SIMPLE_DEV_PM_OPS(twl_dev_pm_ops, twl_suspend, twl_resume);
1269
1270 static const struct i2c_device_id twl_ids[] = {
1271         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1272         { "twl5030", 0 },               /* T2 updated */
1273         { "twl5031", TWL5031 },         /* TWL5030 updated */
1274         { "tps65950", 0 },              /* catalog version of twl5030 */
1275         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1276         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1277         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1278                                            and vibrator. Charger in USB module*/
1279         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1280         { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
1281         { /* end of list */ },
1282 };
1283
1284 /* One Client Driver , 4 Clients */
1285 static struct i2c_driver twl_driver = {
1286         .driver.name    = DRIVER_NAME,
1287         .driver.pm      = &twl_dev_pm_ops,
1288         .id_table       = twl_ids,
1289         .probe          = twl_probe,
1290         .remove         = twl_remove,
1291 };
1292 builtin_i2c_driver(twl_driver);