drivers/mfd/twl-core.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
   4  * and audio CODEC devices
   5  *
   6  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   7  *
   8  * Modifications to defer interrupt handling to a kernel thread:
   9  * Copyright (C) 2006 MontaVista Software, Inc.
  10  *
  11  * Based on tlv320aic23.c:
  12  * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
  13  *
  14  * Code cleanup and modifications to IRQ handler.
  15  * by syed khasim <x0khasim@ti.com>
  16  */
  17
  18 #include <linux/init.h>
  19 #include <linux/mutex.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/regmap.h>
  22 #include <linux/clk.h>
  23 #include <linux/err.h>
  24 #include <linux/device.h>
  25 #include <linux/of.h>
  26 #include <linux/of_irq.h>
  27 #include <linux/of_platform.h>
  28 #include <linux/irq.h>
  29 #include <linux/irqdomain.h>
  30
  31 #include <linux/regulator/machine.h>
  32
  33 #include <linux/i2c.h>
  34 #include <linux/mfd/twl.h>
  35
  36 /* Register descriptions for audio */
  37 #include <linux/mfd/twl4030-audio.h>
  38
  39 #include "twl-core.h"
  40
  41 /*
  42  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  43  * Management and System Companion Device" chips originally designed for
  44  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  45  * often at around 3 Mbit/sec, including for interrupt handling.
  46  *
  47  * This driver core provides genirq support for the interrupts emitted,
  48  * by the various modules, and exports register access primitives.
  49  *
  50  * FIXME this driver currently requires use of the first interrupt line
  51  * (and associated registers).
  52  */
  53
  54 #define DRIVER_NAME                     "twl"
  55
  56 /* Triton Core internal information (BEGIN) */
  57
  58 /* Base Address defns for twl4030_map[] */
  59
  60 /* subchip/slave 0 - USB ID */
  61 #define TWL4030_BASEADD_USB             0x0000
  62
  63 /* subchip/slave 1 - AUD ID */
  64 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
  65 #define TWL4030_BASEADD_GPIO            0x0098
  66 #define TWL4030_BASEADD_INTBR           0x0085
  67 #define TWL4030_BASEADD_PIH             0x0080
  68 #define TWL4030_BASEADD_TEST            0x004C
  69
  70 /* subchip/slave 2 - AUX ID */
  71 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
  72 #define TWL4030_BASEADD_LED             0x00EE
  73 #define TWL4030_BASEADD_MADC            0x0000
  74 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
  75 #define TWL4030_BASEADD_PRECHARGE       0x00AA
  76 #define TWL4030_BASEADD_PWM             0x00F8
  77 #define TWL4030_BASEADD_KEYPAD          0x00D2
  78
  79 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
  80 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
  81                                                   one */
  82
  83 /* subchip/slave 3 - POWER ID */
  84 #define TWL4030_BASEADD_BACKUP          0x0014
  85 #define TWL4030_BASEADD_INT             0x002E
  86 #define TWL4030_BASEADD_PM_MASTER       0x0036
  87
  88 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
  89 #define TWL4030_DCDC_GLOBAL_CFG         0x06
  90 #define SMARTREFLEX_ENABLE              BIT(3)
  91
  92 #define TWL4030_BASEADD_RTC             0x001C
  93 #define TWL4030_BASEADD_SECURED_REG     0x0000
  94
  95 /* Triton Core internal information (END) */
  96
  97
  98 /* subchip/slave 0 0x48 - POWER */
  99 #define TWL6030_BASEADD_RTC             0x0000
 100 #define TWL6030_BASEADD_SECURED_REG     0x0017
 101 #define TWL6030_BASEADD_PM_MASTER       0x001F
 102 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 103 #define TWL6030_BASEADD_PM_MISC         0x00E2
 104 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 105
 106 /* subchip/slave 1 0x49 - FEATURE */
 107 #define TWL6030_BASEADD_USB             0x0000
 108 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 109 #define TWL6030_BASEADD_AUX             0x0090
 110 #define TWL6030_BASEADD_PWM             0x00BA
 111 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 112 #define TWL6030_BASEADD_PIH             0x00D0
 113 #define TWL6030_BASEADD_CHARGER         0x00E0
 114 #define TWL6032_BASEADD_CHARGER         0x00DA
 115 #define TWL6030_BASEADD_LED             0x00F4
 116
 117 /* subchip/slave 2 0x4A - DFT */
 118 #define TWL6030_BASEADD_DIEID           0x00C0
 119
 120 /* subchip/slave 3 0x4B - AUDIO */
 121 #define TWL6030_BASEADD_AUDIO           0x0000
 122 #define TWL6030_BASEADD_RSV             0x0000
 123 #define TWL6030_BASEADD_ZERO            0x0000
 124
 125 /* Few power values */
 126 #define R_CFG_BOOT                      0x05
 127
 128 /* some fields in R_CFG_BOOT */
 129 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 130 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 131 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 132 #define HIGH_PERF_SQ                    (1 << 3)
 133 #define CK32K_LOWPWR_EN                 (1 << 7)
 134
 135 /*----------------------------------------------------------------------*/
 136
 137 /* Structure for each TWL4030/TWL6030 Slave */
 138 struct twl_client {
 139         struct i2c_client *client;
 140         struct regmap *regmap;
 141 };
 142
 143 /* mapping the module id to slave id and base address */
 144 struct twl_mapping {
 145         unsigned char sid;      /* Slave ID */
 146         unsigned char base;     /* base address */
 147 };
 148
 149 struct twl_private {
 150         bool ready; /* The core driver is ready to be used */
 151         u32 twl_idcode; /* TWL IDCODE Register value */
 152         unsigned int twl_id;
 153
 154         struct twl_mapping *twl_map;
 155         struct twl_client *twl_modules;
 156 };
 157
 158 static struct twl_private *twl_priv;
 159
 160 static struct twl_mapping twl4030_map[] = {
 161         /*
 162          * NOTE:  don't change this table without updating the
 163          * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
 164          * so they continue to match the order in this table.
 165          */
 166
 167         /* Common IPs */
 168         { 0, TWL4030_BASEADD_USB },
 169         { 1, TWL4030_BASEADD_PIH },
 170         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 171         { 3, TWL4030_BASEADD_PM_MASTER },
 172         { 3, TWL4030_BASEADD_PM_RECEIVER },
 173
 174         { 3, TWL4030_BASEADD_RTC },
 175         { 2, TWL4030_BASEADD_PWM },
 176         { 2, TWL4030_BASEADD_LED },
 177         { 3, TWL4030_BASEADD_SECURED_REG },
 178
 179         /* TWL4030 specific IPs */
 180         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 181         { 1, TWL4030_BASEADD_GPIO },
 182         { 1, TWL4030_BASEADD_INTBR },
 183         { 1, TWL4030_BASEADD_TEST },
 184         { 2, TWL4030_BASEADD_KEYPAD },
 185
 186         { 2, TWL4030_BASEADD_MADC },
 187         { 2, TWL4030_BASEADD_INTERRUPTS },
 188         { 2, TWL4030_BASEADD_PRECHARGE },
 189         { 3, TWL4030_BASEADD_BACKUP },
 190         { 3, TWL4030_BASEADD_INT },
 191
 192         { 2, TWL5031_BASEADD_ACCESSORY },
 193         { 2, TWL5031_BASEADD_INTERRUPTS },
 194 };
 195
 196 static const struct reg_default twl4030_49_defaults[] = {
 197         /* Audio Registers */
 198         { 0x01, 0x00}, /* CODEC_MODE    */
 199         { 0x02, 0x00}, /* OPTION        */
 200         /* 0x03  Unused */
 201         { 0x04, 0x00}, /* MICBIAS_CTL   */
 202         { 0x05, 0x00}, /* ANAMICL       */
 203         { 0x06, 0x00}, /* ANAMICR       */
 204         { 0x07, 0x00}, /* AVADC_CTL     */
 205         { 0x08, 0x00}, /* ADCMICSEL     */
 206         { 0x09, 0x00}, /* DIGMIXING     */
 207         { 0x0a, 0x0f}, /* ATXL1PGA      */
 208         { 0x0b, 0x0f}, /* ATXR1PGA      */
 209         { 0x0c, 0x0f}, /* AVTXL2PGA     */
 210         { 0x0d, 0x0f}, /* AVTXR2PGA     */
 211         { 0x0e, 0x00}, /* AUDIO_IF      */
 212         { 0x0f, 0x00}, /* VOICE_IF      */
 213         { 0x10, 0x3f}, /* ARXR1PGA      */
 214         { 0x11, 0x3f}, /* ARXL1PGA      */
 215         { 0x12, 0x3f}, /* ARXR2PGA      */
 216         { 0x13, 0x3f}, /* ARXL2PGA      */
 217         { 0x14, 0x25}, /* VRXPGA        */
 218         { 0x15, 0x00}, /* VSTPGA        */
 219         { 0x16, 0x00}, /* VRX2ARXPGA    */
 220         { 0x17, 0x00}, /* AVDAC_CTL     */
 221         { 0x18, 0x00}, /* ARX2VTXPGA    */
 222         { 0x19, 0x32}, /* ARXL1_APGA_CTL*/
 223         { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
 224         { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
 225         { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
 226         { 0x1d, 0x00}, /* ATX2ARXPGA    */
 227         { 0x1e, 0x00}, /* BT_IF         */
 228         { 0x1f, 0x55}, /* BTPGA         */
 229         { 0x20, 0x00}, /* BTSTPGA       */
 230         { 0x21, 0x00}, /* EAR_CTL       */
 231         { 0x22, 0x00}, /* HS_SEL        */
 232         { 0x23, 0x00}, /* HS_GAIN_SET   */
 233         { 0x24, 0x00}, /* HS_POPN_SET   */
 234         { 0x25, 0x00}, /* PREDL_CTL     */
 235         { 0x26, 0x00}, /* PREDR_CTL     */
 236         { 0x27, 0x00}, /* PRECKL_CTL    */
 237         { 0x28, 0x00}, /* PRECKR_CTL    */
 238         { 0x29, 0x00}, /* HFL_CTL       */
 239         { 0x2a, 0x00}, /* HFR_CTL       */
 240         { 0x2b, 0x05}, /* ALC_CTL       */
 241         { 0x2c, 0x00}, /* ALC_SET1      */
 242         { 0x2d, 0x00}, /* ALC_SET2      */
 243         { 0x2e, 0x00}, /* BOOST_CTL     */
 244         { 0x2f, 0x00}, /* SOFTVOL_CTL   */
 245         { 0x30, 0x13}, /* DTMF_FREQSEL  */
 246         { 0x31, 0x00}, /* DTMF_TONEXT1H */
 247         { 0x32, 0x00}, /* DTMF_TONEXT1L */
 248         { 0x33, 0x00}, /* DTMF_TONEXT2H */
 249         { 0x34, 0x00}, /* DTMF_TONEXT2L */
 250         { 0x35, 0x79}, /* DTMF_TONOFF   */
 251         { 0x36, 0x11}, /* DTMF_WANONOFF */
 252         { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
 253         { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
 254         { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
 255         { 0x3a, 0x06}, /* APLL_CTL */
 256         { 0x3b, 0x00}, /* DTMF_CTL */
 257         { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
 258         { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
 259         { 0x3e, 0x00}, /* MISC_SET_1 */
 260         { 0x3f, 0x00}, /* PCMBTMUX */
 261         /* 0x40 - 0x42  Unused */
 262         { 0x43, 0x00}, /* RX_PATH_SEL */
 263         { 0x44, 0x32}, /* VDL_APGA_CTL */
 264         { 0x45, 0x00}, /* VIBRA_CTL */
 265         { 0x46, 0x00}, /* VIBRA_SET */
 266         { 0x47, 0x00}, /* VIBRA_PWM_SET */
 267         { 0x48, 0x00}, /* ANAMIC_GAIN   */
 268         { 0x49, 0x00}, /* MISC_SET_2    */
 269         /* End of Audio Registers */
 270 };
 271
 272 static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
 273 {
 274         switch (reg) {
 275         case 0x00:
 276         case 0x03:
 277         case 0x40:
 278         case 0x41:
 279         case 0x42:
 280                 return false;
 281         default:
 282                 return true;
 283         }
 284 }
 285
 286 static const struct regmap_range twl4030_49_volatile_ranges[] = {
 287         regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
 288 };
 289
 290 static const struct regmap_access_table twl4030_49_volatile_table = {
 291         .yes_ranges = twl4030_49_volatile_ranges,
 292         .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
 293 };
 294
 295 static const struct regmap_config twl4030_regmap_config[4] = {
 296         {
 297                 /* Address 0x48 */
 298                 .reg_bits = 8,
 299                 .val_bits = 8,
 300                 .max_register = 0xff,
 301         },
 302         {
 303                 /* Address 0x49 */
 304                 .reg_bits = 8,
 305                 .val_bits = 8,
 306                 .max_register = 0xff,
 307
 308                 .readable_reg = twl4030_49_nop_reg,
 309                 .writeable_reg = twl4030_49_nop_reg,
 310
 311                 .volatile_table = &twl4030_49_volatile_table,
 312
 313                 .reg_defaults = twl4030_49_defaults,
 314                 .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
 315                 .cache_type = REGCACHE_RBTREE,
 316         },
 317         {
 318                 /* Address 0x4a */
 319                 .reg_bits = 8,
 320                 .val_bits = 8,
 321                 .max_register = 0xff,
 322         },
 323         {
 324                 /* Address 0x4b */
 325                 .reg_bits = 8,
 326                 .val_bits = 8,
 327                 .max_register = 0xff,
 328         },
 329 };
 330
 331 static struct twl_mapping twl6030_map[] = {
 332         /*
 333          * NOTE:  don't change this table without updating the
 334          * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
 335          * so they continue to match the order in this table.
 336          */
 337
 338         /* Common IPs */
 339         { 1, TWL6030_BASEADD_USB },
 340         { 1, TWL6030_BASEADD_PIH },
 341         { 1, TWL6030_BASEADD_CHARGER },
 342         { 0, TWL6030_BASEADD_PM_MASTER },
 343         { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
 344
 345         { 0, TWL6030_BASEADD_RTC },
 346         { 1, TWL6030_BASEADD_PWM },
 347         { 1, TWL6030_BASEADD_LED },
 348         { 0, TWL6030_BASEADD_SECURED_REG },
 349
 350         /* TWL6030 specific IPs */
 351         { 0, TWL6030_BASEADD_ZERO },
 352         { 1, TWL6030_BASEADD_ZERO },
 353         { 2, TWL6030_BASEADD_ZERO },
 354         { 1, TWL6030_BASEADD_GPADC_CTRL },
 355         { 1, TWL6030_BASEADD_GASGAUGE },
 356 };
 357
 358 static const struct regmap_config twl6030_regmap_config[3] = {
 359         {
 360                 /* Address 0x48 */
 361                 .reg_bits = 8,
 362                 .val_bits = 8,
 363                 .max_register = 0xff,
 364         },
 365         {
 366                 /* Address 0x49 */
 367                 .reg_bits = 8,
 368                 .val_bits = 8,
 369                 .max_register = 0xff,
 370         },
 371         {
 372                 /* Address 0x4a */
 373                 .reg_bits = 8,
 374                 .val_bits = 8,
 375                 .max_register = 0xff,
 376         },
 377 };
 378
 379 /*----------------------------------------------------------------------*/
 380
 381 static inline int twl_get_num_slaves(void)
 382 {
 383         if (twl_class_is_4030())
 384                 return 4; /* TWL4030 class have four slave address */
 385         else
 386                 return 3; /* TWL6030 class have three slave address */
 387 }
 388
 389 static inline int twl_get_last_module(void)
 390 {
 391         if (twl_class_is_4030())
 392                 return TWL4030_MODULE_LAST;
 393         else
 394                 return TWL6030_MODULE_LAST;
 395 }
 396
 397 /* Exported Functions */
 398
 399 unsigned int twl_rev(void)
 400 {
 401         return twl_priv ? twl_priv->twl_id : 0;
 402 }
 403 EXPORT_SYMBOL(twl_rev);
 404
 405 /**
 406  * twl_get_regmap - Get the regmap associated with the given module
 407  * @mod_no: module number
 408  *
 409  * Returns the regmap pointer or NULL in case of failure.
 410  */
 411 static struct regmap *twl_get_regmap(u8 mod_no)
 412 {
 413         int sid;
 414         struct twl_client *twl;
 415
 416         if (unlikely(!twl_priv || !twl_priv->ready)) {
 417                 pr_err("%s: not initialized\n", DRIVER_NAME);
 418                 return NULL;
 419         }
 420         if (unlikely(mod_no >= twl_get_last_module())) {
 421                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 422                 return NULL;
 423         }
 424
 425         sid = twl_priv->twl_map[mod_no].sid;
 426         twl = &twl_priv->twl_modules[sid];
 427
 428         return twl->regmap;
 429 }
 430
 431 /**
 432  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 433  * @mod_no: module number
 434  * @value: an array of num_bytes+1 containing data to write
 435  * @reg: register address (just offset will do)
 436  * @num_bytes: number of bytes to transfer
 437  *
 438  * Returns 0 on success or else a negative error code.
 439  */
 440 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 441 {
 442         struct regmap *regmap = twl_get_regmap(mod_no);
 443         int ret;
 444
 445         if (!regmap)
 446                 return -EPERM;
 447
 448         ret = regmap_bulk_write(regmap, twl_priv->twl_map[mod_no].base + reg,
 449                                 value, num_bytes);
 450
 451         if (ret)
 452                 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
 453                        DRIVER_NAME, mod_no, reg, num_bytes);
 454
 455         return ret;
 456 }
 457 EXPORT_SYMBOL(twl_i2c_write);
 458
 459 /**
 460  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 461  * @mod_no: module number
 462  * @value: an array of num_bytes containing data to be read
 463  * @reg: register address (just offset will do)
 464  * @num_bytes: number of bytes to transfer
 465  *
 466  * Returns 0 on success or else a negative error code.
 467  */
 468 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 469 {
 470         struct regmap *regmap = twl_get_regmap(mod_no);
 471         int ret;
 472
 473         if (!regmap)
 474                 return -EPERM;
 475
 476         ret = regmap_bulk_read(regmap, twl_priv->twl_map[mod_no].base + reg,
 477                                value, num_bytes);
 478
 479         if (ret)
 480                 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
 481                        DRIVER_NAME, mod_no, reg, num_bytes);
 482
 483         return ret;
 484 }
 485 EXPORT_SYMBOL(twl_i2c_read);
 486
 487 /**
 488  * twl_set_regcache_bypass - Configure the regcache bypass for the regmap associated
 489  *                       with the module
 490  * @mod_no: module number
 491  * @enable: Regcache bypass state
 492  *
 493  * Returns 0 else failure.
 494  */
 495 int twl_set_regcache_bypass(u8 mod_no, bool enable)
 496 {
 497         struct regmap *regmap = twl_get_regmap(mod_no);
 498
 499         if (!regmap)
 500                 return -EPERM;
 501
 502         regcache_cache_bypass(regmap, enable);
 503
 504         return 0;
 505 }
 506 EXPORT_SYMBOL(twl_set_regcache_bypass);
 507
 508 /*----------------------------------------------------------------------*/
 509
 510 /**
 511  * twl_read_idcode_register - API to read the IDCODE register.
 512  *
 513  * Unlocks the IDCODE register and read the 32 bit value.
 514  */
 515 static int twl_read_idcode_register(void)
 516 {
 517         int err;
 518
 519         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 520                                                 REG_UNLOCK_TEST_REG);
 521         if (err) {
 522                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 523                 goto fail;
 524         }
 525
 526         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
 527                                                 REG_IDCODE_7_0, 4);
 528         if (err) {
 529                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 530                 goto fail;
 531         }
 532
 533         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 534         if (err)
 535                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 536 fail:
 537         return err;
 538 }
 539
 540 /**
 541  * twl_get_type - API to get TWL Si type.
 542  *
 543  * Api to get the TWL Si type from IDCODE value.
 544  */
 545 int twl_get_type(void)
 546 {
 547         return TWL_SIL_TYPE(twl_priv->twl_idcode);
 548 }
 549 EXPORT_SYMBOL_GPL(twl_get_type);
 550
 551 /**
 552  * twl_get_version - API to get TWL Si version.
 553  *
 554  * Api to get the TWL Si version from IDCODE value.
 555  */
 556 int twl_get_version(void)
 557 {
 558         return TWL_SIL_REV(twl_priv->twl_idcode);
 559 }
 560 EXPORT_SYMBOL_GPL(twl_get_version);
 561
 562 /**
 563  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
 564  *
 565  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
 566  */
 567 int twl_get_hfclk_rate(void)
 568 {
 569         u8 ctrl;
 570         int rate;
 571
 572         twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
 573
 574         switch (ctrl & 0x3) {
 575         case HFCLK_FREQ_19p2_MHZ:
 576                 rate = 19200000;
 577                 break;
 578         case HFCLK_FREQ_26_MHZ:
 579                 rate = 26000000;
 580                 break;
 581         case HFCLK_FREQ_38p4_MHZ:
 582                 rate = 38400000;
 583                 break;
 584         default:
 585                 pr_err("TWL4030: HFCLK is not configured\n");
 586                 rate = -EINVAL;
 587                 break;
 588         }
 589
 590         return rate;
 591 }
 592 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
 593
 594 static struct device *
 595 add_numbered_child(unsigned mod_no, const char *name, int num,
 596                 void *pdata, unsigned pdata_len,
 597                 bool can_wakeup, int irq0, int irq1)
 598 {
 599         struct platform_device  *pdev;
 600         struct twl_client       *twl;
 601         int                     status, sid;
 602
 603         if (unlikely(mod_no >= twl_get_last_module())) {
 604                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 605                 return ERR_PTR(-EPERM);
 606         }
 607         sid = twl_priv->twl_map[mod_no].sid;
 608         twl = &twl_priv->twl_modules[sid];
 609
 610         pdev = platform_device_alloc(name, num);
 611         if (!pdev)
 612                 return ERR_PTR(-ENOMEM);
 613
 614         pdev->dev.parent = &twl->client->dev;
 615
 616         if (pdata) {
 617                 status = platform_device_add_data(pdev, pdata, pdata_len);
 618                 if (status < 0) {
 619                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 620                         goto put_device;
 621                 }
 622         }
 623
 624         if (irq0) {
 625                 struct resource r[2] = {
 626                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 627                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 628                 };
 629
 630                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 631                 if (status < 0) {
 632                         dev_dbg(&pdev->dev, "can't add irqs\n");
 633                         goto put_device;
 634                 }
 635         }
 636
 637         status = platform_device_add(pdev);
 638         if (status)
 639                 goto put_device;
 640
 641         device_init_wakeup(&pdev->dev, can_wakeup);
 642
 643         return &pdev->dev;
 644
 645 put_device:
 646         platform_device_put(pdev);
 647         dev_err(&twl->client->dev, "failed to add device %s\n", name);
 648         return ERR_PTR(status);
 649 }
 650
 651 static inline struct device *add_child(unsigned mod_no, const char *name,
 652                 void *pdata, unsigned pdata_len,
 653                 bool can_wakeup, int irq0, int irq1)
 654 {
 655         return add_numbered_child(mod_no, name, -1, pdata, pdata_len,
 656                 can_wakeup, irq0, irq1);
 657 }
 658
 659 static struct device *
 660 add_regulator_linked(int num, struct regulator_init_data *pdata,
 661                 struct regulator_consumer_supply *consumers,
 662                 unsigned num_consumers, unsigned long features)
 663 {
 664         struct twl_regulator_driver_data drv_data;
 665
 666         /* regulator framework demands init_data ... */
 667         if (!pdata)
 668                 return NULL;
 669
 670         if (consumers) {
 671                 pdata->consumer_supplies = consumers;
 672                 pdata->num_consumer_supplies = num_consumers;
 673         }
 674
 675         if (pdata->driver_data) {
 676                 /* If we have existing drv_data, just add the flags */
 677                 struct twl_regulator_driver_data *tmp;
 678                 tmp = pdata->driver_data;
 679                 tmp->features |= features;
 680         } else {
 681                 /* add new driver data struct, used only during init */
 682                 drv_data.features = features;
 683                 drv_data.set_voltage = NULL;
 684                 drv_data.get_voltage = NULL;
 685                 drv_data.data = NULL;
 686                 pdata->driver_data = &drv_data;
 687         }
 688
 689         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 690         return add_numbered_child(TWL_MODULE_PM_MASTER, "twl_reg", num,
 691                 pdata, sizeof(*pdata), false, 0, 0);
 692 }
 693
 694 static struct device *
 695 add_regulator(int num, struct regulator_init_data *pdata,
 696                 unsigned long features)
 697 {
 698         return add_regulator_linked(num, pdata, NULL, 0, features);
 699 }
 700
 701 /*
 702  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 703  * for the PIH, and the next are for the PWR_INT SIH, since
 704  * that's how twl_init_irq() sets things up.
 705  */
 706
 707 static int
 708 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 709                 unsigned long features)
 710 {
 711         struct device   *child;
 712
 713         if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
 714                 child = add_child(TWL4030_MODULE_GPIO, "twl4030_gpio",
 715                                 pdata->gpio, sizeof(*pdata->gpio),
 716                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 717                 if (IS_ERR(child))
 718                         return PTR_ERR(child);
 719         }
 720
 721         if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
 722                 child = add_child(TWL4030_MODULE_KEYPAD, "twl4030_keypad",
 723                                 pdata->keypad, sizeof(*pdata->keypad),
 724                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 725                 if (IS_ERR(child))
 726                         return PTR_ERR(child);
 727         }
 728
 729         if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
 730             twl_class_is_4030()) {
 731                 child = add_child(TWL4030_MODULE_MADC, "twl4030_madc",
 732                                 pdata->madc, sizeof(*pdata->madc),
 733                                 true, irq_base + MADC_INTR_OFFSET, 0);
 734                 if (IS_ERR(child))
 735                         return PTR_ERR(child);
 736         }
 737
 738         if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
 739                 /*
 740                  * REVISIT platform_data here currently might expose the
 741                  * "msecure" line ... but for now we just expect board
 742                  * setup to tell the chip "it's always ok to SET_TIME".
 743                  * Eventually, Linux might become more aware of such
 744                  * HW security concerns, and "least privilege".
 745                  */
 746                 child = add_child(TWL_MODULE_RTC, "twl_rtc", NULL, 0,
 747                                 true, irq_base + RTC_INTR_OFFSET, 0);
 748                 if (IS_ERR(child))
 749                         return PTR_ERR(child);
 750         }
 751
 752         if (IS_ENABLED(CONFIG_PWM_TWL)) {
 753                 child = add_child(TWL_MODULE_PWM, "twl-pwm", NULL, 0,
 754                                   false, 0, 0);
 755                 if (IS_ERR(child))
 756                         return PTR_ERR(child);
 757         }
 758
 759         if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
 760                 child = add_child(TWL_MODULE_LED, "twl-pwmled", NULL, 0,
 761                                   false, 0, 0);
 762                 if (IS_ERR(child))
 763                         return PTR_ERR(child);
 764         }
 765
 766         if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
 767             twl_class_is_4030()) {
 768
 769                 static struct regulator_consumer_supply usb1v5 = {
 770                         .supply =       "usb1v5",
 771                 };
 772                 static struct regulator_consumer_supply usb1v8 = {
 773                         .supply =       "usb1v8",
 774                 };
 775                 static struct regulator_consumer_supply usb3v1 = {
 776                         .supply =       "usb3v1",
 777                 };
 778
 779         /* First add the regulators so that they can be used by transceiver */
 780                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 781                         /* this is a template that gets copied */
 782                         struct regulator_init_data usb_fixed = {
 783                                 .constraints.valid_modes_mask =
 784                                         REGULATOR_MODE_NORMAL
 785                                         | REGULATOR_MODE_STANDBY,
 786                                 .constraints.valid_ops_mask =
 787                                         REGULATOR_CHANGE_MODE
 788                                         | REGULATOR_CHANGE_STATUS,
 789                         };
 790
 791                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 792                                                       &usb_fixed, &usb1v5, 1,
 793                                                       features);
 794                         if (IS_ERR(child))
 795                                 return PTR_ERR(child);
 796
 797                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 798                                                       &usb_fixed, &usb1v8, 1,
 799                                                       features);
 800                         if (IS_ERR(child))
 801                                 return PTR_ERR(child);
 802
 803                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 804                                                       &usb_fixed, &usb3v1, 1,
 805                                                       features);
 806                         if (IS_ERR(child))
 807                                 return PTR_ERR(child);
 808
 809                 }
 810
 811                 child = add_child(TWL_MODULE_USB, "twl4030_usb",
 812                                 pdata->usb, sizeof(*pdata->usb), true,
 813                                 /* irq0 = USB_PRES, irq1 = USB */
 814                                 irq_base + USB_PRES_INTR_OFFSET,
 815                                 irq_base + USB_INTR_OFFSET);
 816
 817                 if (IS_ERR(child))
 818                         return PTR_ERR(child);
 819
 820                 /* we need to connect regulators to this transceiver */
 821                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
 822                         usb1v5.dev_name = dev_name(child);
 823                         usb1v8.dev_name = dev_name(child);
 824                         usb3v1.dev_name = dev_name(child);
 825                 }
 826         }
 827
 828         if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
 829                 child = add_child(TWL_MODULE_PM_RECEIVER, "twl4030_wdt", NULL,
 830                                   0, false, 0, 0);
 831                 if (IS_ERR(child))
 832                         return PTR_ERR(child);
 833         }
 834
 835         if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
 836                 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_pwrbutton",
 837                                   NULL, 0, true, irq_base + 8 + 0, 0);
 838                 if (IS_ERR(child))
 839                         return PTR_ERR(child);
 840         }
 841
 842         if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
 843             twl_class_is_4030()) {
 844                 child = add_child(TWL4030_MODULE_AUDIO_VOICE, "twl4030-audio",
 845                                 pdata->audio, sizeof(*pdata->audio),
 846                                 false, 0, 0);
 847                 if (IS_ERR(child))
 848                         return PTR_ERR(child);
 849         }
 850
 851         /* twl4030 regulators */
 852         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
 853                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 854                                         features);
 855                 if (IS_ERR(child))
 856                         return PTR_ERR(child);
 857
 858                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 859                                         features);
 860                 if (IS_ERR(child))
 861                         return PTR_ERR(child);
 862
 863                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 864                                         features);
 865                 if (IS_ERR(child))
 866                         return PTR_ERR(child);
 867
 868                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 869                                         features);
 870                 if (IS_ERR(child))
 871                         return PTR_ERR(child);
 872
 873                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 874                                         features);
 875                 if (IS_ERR(child))
 876                         return PTR_ERR(child);
 877
 878                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 879                                         features);
 880                 if (IS_ERR(child))
 881                         return PTR_ERR(child);
 882
 883                 child = add_regulator((features & TWL4030_VAUX2)
 884                                         ? TWL4030_REG_VAUX2_4030
 885                                         : TWL4030_REG_VAUX2,
 886                                 pdata->vaux2, features);
 887                 if (IS_ERR(child))
 888                         return PTR_ERR(child);
 889
 890                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 891                                         features);
 892                 if (IS_ERR(child))
 893                         return PTR_ERR(child);
 894
 895                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 896                                         features);
 897                 if (IS_ERR(child))
 898                         return PTR_ERR(child);
 899
 900                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 901                                         features);
 902                 if (IS_ERR(child))
 903                         return PTR_ERR(child);
 904         }
 905
 906         /* maybe add LDOs that are omitted on cost-reduced parts */
 907         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
 908           && twl_class_is_4030()) {
 909                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 910                                         features);
 911                 if (IS_ERR(child))
 912                         return PTR_ERR(child);
 913
 914                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 915                                         features);
 916                 if (IS_ERR(child))
 917                         return PTR_ERR(child);
 918
 919                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 920                                         features);
 921                 if (IS_ERR(child))
 922                         return PTR_ERR(child);
 923
 924                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 925                                         features);
 926                 if (IS_ERR(child))
 927                         return PTR_ERR(child);
 928
 929                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 930                                         features);
 931                 if (IS_ERR(child))
 932                         return PTR_ERR(child);
 933
 934                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 935                                         features);
 936                 if (IS_ERR(child))
 937                         return PTR_ERR(child);
 938         }
 939
 940         if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
 941                         !(features & (TPS_SUBSET | TWL5031))) {
 942                 child = add_child(TWL_MODULE_MAIN_CHARGE, "twl4030_bci",
 943                                 pdata->bci, sizeof(*pdata->bci), false,
 944                                 /* irq0 = CHG_PRES, irq1 = BCI */
 945                                 irq_base + BCI_PRES_INTR_OFFSET,
 946                                 irq_base + BCI_INTR_OFFSET);
 947                 if (IS_ERR(child))
 948                         return PTR_ERR(child);
 949         }
 950
 951         if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power) {
 952                 child = add_child(TWL_MODULE_PM_MASTER, "twl4030_power",
 953                                   pdata->power, sizeof(*pdata->power), false,
 954                                   0, 0);
 955                 if (IS_ERR(child))
 956                         return PTR_ERR(child);
 957         }
 958
 959         return 0;
 960 }
 961
 962 /*----------------------------------------------------------------------*/
 963
 964 /*
 965  * These three functions initialize the on-chip clock framework,
 966  * letting it generate the right frequencies for USB, MADC, and
 967  * other purposes.
 968  */
 969 static inline int protect_pm_master(void)
 970 {
 971         int e = 0;
 972
 973         e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, 0,
 974                              TWL4030_PM_MASTER_PROTECT_KEY);
 975         return e;
 976 }
 977
 978 static inline int unprotect_pm_master(void)
 979 {
 980         int e = 0;
 981
 982         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
 983                               TWL4030_PM_MASTER_PROTECT_KEY);
 984         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
 985                               TWL4030_PM_MASTER_PROTECT_KEY);
 986
 987         return e;
 988 }
 989
 990 static void clocks_init(struct device *dev,
 991                         struct twl4030_clock_init_data *clock)
 992 {
 993         int e = 0;
 994         struct clk *osc;
 995         u32 rate;
 996         u8 ctrl = HFCLK_FREQ_26_MHZ;
 997
 998         osc = clk_get(dev, "fck");
 999         if (IS_ERR(osc)) {
1000                 printk(KERN_WARNING "Skipping twl internal clock init and "
1001                                 "using bootloader value (unknown osc rate)\n");
1002                 return;
1003         }
1004
1005         rate = clk_get_rate(osc);
1006         clk_put(osc);
1007
1008         switch (rate) {
1009         case 19200000:
1010                 ctrl = HFCLK_FREQ_19p2_MHZ;
1011                 break;
1012         case 26000000:
1013                 ctrl = HFCLK_FREQ_26_MHZ;
1014                 break;
1015         case 38400000:
1016                 ctrl = HFCLK_FREQ_38p4_MHZ;
1017                 break;
1018         }
1019
1020         ctrl |= HIGH_PERF_SQ;
1021         if (clock && clock->ck32k_lowpwr_enable)
1022                 ctrl |= CK32K_LOWPWR_EN;
1023
1024         e |= unprotect_pm_master();
1025         /* effect->MADC+USB ck en */
1026         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1027         e |= protect_pm_master();
1028
1029         if (e < 0)
1030                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1031 }
1032
1033 /*----------------------------------------------------------------------*/
1034
1035
1036 static int twl_remove(struct i2c_client *client)
1037 {
1038         unsigned i, num_slaves;
1039
1040         if (twl_class_is_4030())
1041                 twl4030_exit_irq();
1042         else
1043                 twl6030_exit_irq();
1044
1045         num_slaves = twl_get_num_slaves();
1046         for (i = 0; i < num_slaves; i++) {
1047                 struct twl_client       *twl = &twl_priv->twl_modules[i];
1048
1049                 if (twl->client && twl->client != client)
1050                         i2c_unregister_device(twl->client);
1051                 twl->client = NULL;
1052         }
1053         twl_priv->ready = false;
1054         return 0;
1055 }
1056
1057 static struct of_dev_auxdata twl_auxdata_lookup[] = {
1058         OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
1059         { /* sentinel */ },
1060 };
1061
1062 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1063 static int
1064 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1065 {
1066         struct twl4030_platform_data    *pdata = dev_get_platdata(&client->dev);
1067         struct device_node              *node = client->dev.of_node;
1068         struct platform_device          *pdev;
1069         const struct regmap_config      *twl_regmap_config;
1070         int                             irq_base = 0;
1071         int                             status;
1072         unsigned                        i, num_slaves;
1073
1074         if (!node && !pdata) {
1075                 dev_err(&client->dev, "no platform data\n");
1076                 return -EINVAL;
1077         }
1078
1079         if (twl_priv) {
1080                 dev_dbg(&client->dev, "only one instance of %s allowed\n",
1081                         DRIVER_NAME);
1082                 return -EBUSY;
1083         }
1084
1085         pdev = platform_device_alloc(DRIVER_NAME, -1);
1086         if (!pdev) {
1087                 dev_err(&client->dev, "can't alloc pdev\n");
1088                 return -ENOMEM;
1089         }
1090
1091         status = platform_device_add(pdev);
1092         if (status) {
1093                 platform_device_put(pdev);
1094                 return status;
1095         }
1096
1097         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1098                 dev_dbg(&client->dev, "can't talk I2C?\n");
1099                 status = -EIO;
1100                 goto free;
1101         }
1102
1103         twl_priv = devm_kzalloc(&client->dev, sizeof(struct twl_private),
1104                                 GFP_KERNEL);
1105         if (!twl_priv) {
1106                 status = -ENOMEM;
1107                 goto free;
1108         }
1109
1110         if ((id->driver_data) & TWL6030_CLASS) {
1111                 twl_priv->twl_id = TWL6030_CLASS_ID;
1112                 twl_priv->twl_map = &twl6030_map[0];
1113                 /* The charger base address is different in twl6032 */
1114                 if ((id->driver_data) & TWL6032_SUBCLASS)
1115                         twl_priv->twl_map[TWL_MODULE_MAIN_CHARGE].base =
1116                                                         TWL6032_BASEADD_CHARGER;
1117                 twl_regmap_config = twl6030_regmap_config;
1118         } else {
1119                 twl_priv->twl_id = TWL4030_CLASS_ID;
1120                 twl_priv->twl_map = &twl4030_map[0];
1121                 twl_regmap_config = twl4030_regmap_config;
1122         }
1123
1124         num_slaves = twl_get_num_slaves();
1125         twl_priv->twl_modules = devm_kcalloc(&client->dev,
1126                                          num_slaves,
1127                                          sizeof(struct twl_client),
1128                                          GFP_KERNEL);
1129         if (!twl_priv->twl_modules) {
1130                 status = -ENOMEM;
1131                 goto free;
1132         }
1133
1134         for (i = 0; i < num_slaves; i++) {
1135                 struct twl_client *twl = &twl_priv->twl_modules[i];
1136
1137                 if (i == 0) {
1138                         twl->client = client;
1139                 } else {
1140                         twl->client = i2c_new_dummy_device(client->adapter,
1141                                                     client->addr + i);
1142                         if (IS_ERR(twl->client)) {
1143                                 dev_err(&client->dev,
1144                                         "can't attach client %d\n", i);
1145                                 status = PTR_ERR(twl->client);
1146                                 goto fail;
1147                         }
1148                 }
1149
1150                 twl->regmap = devm_regmap_init_i2c(twl->client,
1151                                                    &twl_regmap_config[i]);
1152                 if (IS_ERR(twl->regmap)) {
1153                         status = PTR_ERR(twl->regmap);
1154                         dev_err(&client->dev,
1155                                 "Failed to allocate regmap %d, err: %d\n", i,
1156                                 status);
1157                         goto fail;
1158                 }
1159         }
1160
1161         twl_priv->ready = true;
1162
1163         /* setup clock framework */
1164         clocks_init(&client->dev, pdata ? pdata->clock : NULL);
1165
1166         /* read TWL IDCODE Register */
1167         if (twl_class_is_4030()) {
1168                 status = twl_read_idcode_register();
1169                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1170         }
1171
1172         /* Maybe init the T2 Interrupt subsystem */
1173         if (client->irq) {
1174                 if (twl_class_is_4030()) {
1175                         twl4030_init_chip_irq(id->name);
1176                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1177                 } else {
1178                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1179                 }
1180
1181                 if (irq_base < 0) {
1182                         status = irq_base;
1183                         goto fail;
1184                 }
1185         }
1186
1187         /*
1188          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1189          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1190          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1191          *
1192          * Also, always enable SmartReflex bit as that's needed for omaps to
1193          * to do anything over I2C4 for voltage scaling even if SmartReflex
1194          * is disabled. Without the SmartReflex bit omap sys_clkreq idle
1195          * signal will never trigger for retention idle.
1196          */
1197         if (twl_class_is_4030()) {
1198                 u8 temp;
1199
1200                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1201                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1202                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1203                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1204
1205                 twl_i2c_read_u8(TWL_MODULE_PM_RECEIVER, &temp,
1206                                 TWL4030_DCDC_GLOBAL_CFG);
1207                 temp |= SMARTREFLEX_ENABLE;
1208                 twl_i2c_write_u8(TWL_MODULE_PM_RECEIVER, temp,
1209                                  TWL4030_DCDC_GLOBAL_CFG);
1210         }
1211
1212         if (node) {
1213                 if (pdata)
1214                         twl_auxdata_lookup[0].platform_data = pdata->gpio;
1215                 status = of_platform_populate(node, NULL, twl_auxdata_lookup,
1216                                               &client->dev);
1217         } else {
1218                 status = add_children(pdata, irq_base, id->driver_data);
1219         }
1220
1221 fail:
1222         if (status < 0)
1223                 twl_remove(client);
1224 free:
1225         if (status < 0)
1226                 platform_device_unregister(pdev);
1227
1228         return status;
1229 }
1230
1231 static int __maybe_unused twl_suspend(struct device *dev)
1232 {
1233         struct i2c_client *client = to_i2c_client(dev);
1234
1235         if (client->irq)
1236                 disable_irq(client->irq);
1237
1238         return 0;
1239 }
1240
1241 static int __maybe_unused twl_resume(struct device *dev)
1242 {
1243         struct i2c_client *client = to_i2c_client(dev);
1244
1245         if (client->irq)
1246                 enable_irq(client->irq);
1247
1248         return 0;
1249 }
1250
1251 static SIMPLE_DEV_PM_OPS(twl_dev_pm_ops, twl_suspend, twl_resume);
1252
1253 static const struct i2c_device_id twl_ids[] = {
1254         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1255         { "twl5030", 0 },               /* T2 updated */
1256         { "twl5031", TWL5031 },         /* TWL5030 updated */
1257         { "tps65950", 0 },              /* catalog version of twl5030 */
1258         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1259         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1260         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1261                                            and vibrator. Charger in USB module*/
1262         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1263         { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
1264         { /* end of list */ },
1265 };
1266
1267 /* One Client Driver , 4 Clients */
1268 static struct i2c_driver twl_driver = {
1269         .driver.name    = DRIVER_NAME,
1270         .driver.pm      = &twl_dev_pm_ops,
1271         .id_table       = twl_ids,
1272         .probe          = twl_probe,
1273         .remove         = twl_remove,
1274 };
1275 builtin_i2c_driver(twl_driver);