drivers/mfd/twl-core.c

   1 /*
   2  * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
   3  * and audio CODEC devices
   4  *
   5  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   6  *
   7  * Modifications to defer interrupt handling to a kernel thread:
   8  * Copyright (C) 2006 MontaVista Software, Inc.
   9  *
  10  * Based on tlv320aic23.c:
  11  * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
  12  *
  13  * Code cleanup and modifications to IRQ handler.
  14  * by syed khasim <x0khasim@ti.com>
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  29  */
  30
  31 #include <linux/init.h>
  32 #include <linux/mutex.h>
  33 #include <linux/module.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/clk.h>
  36 #include <linux/err.h>
  37 #include <linux/device.h>
  38 #include <linux/of.h>
  39 #include <linux/of_irq.h>
  40 #include <linux/of_platform.h>
  41 #include <linux/irqdomain.h>
  42
  43 #include <linux/regulator/machine.h>
  44
  45 #include <linux/i2c.h>
  46 #include <linux/i2c/twl.h>
  47
  48 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  49 #include <plat/cpu.h>
  50 #endif
  51
  52 /*
  53  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  54  * Management and System Companion Device" chips originally designed for
  55  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  56  * often at around 3 Mbit/sec, including for interrupt handling.
  57  *
  58  * This driver core provides genirq support for the interrupts emitted,
  59  * by the various modules, and exports register access primitives.
  60  *
  61  * FIXME this driver currently requires use of the first interrupt line
  62  * (and associated registers).
  63  */
  64
  65 #define DRIVER_NAME                     "twl"
  66
  67 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  68 #define twl_has_keypad()        true
  69 #else
  70 #define twl_has_keypad()        false
  71 #endif
  72
  73 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  74 #define twl_has_gpio()  true
  75 #else
  76 #define twl_has_gpio()  false
  77 #endif
  78
  79 #if defined(CONFIG_REGULATOR_TWL4030) \
  80         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  81 #define twl_has_regulator()     true
  82 #else
  83 #define twl_has_regulator()     false
  84 #endif
  85
  86 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  87 #define twl_has_madc()  true
  88 #else
  89 #define twl_has_madc()  false
  90 #endif
  91
  92 #ifdef CONFIG_TWL4030_POWER
  93 #define twl_has_power()        true
  94 #else
  95 #define twl_has_power()        false
  96 #endif
  97
  98 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  99 #define twl_has_rtc()   true
 100 #else
 101 #define twl_has_rtc()   false
 102 #endif
 103
 104 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 105         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 106 #define twl_has_usb()   true
 107 #else
 108 #define twl_has_usb()   false
 109 #endif
 110
 111 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 112         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 113 #define twl_has_watchdog()        true
 114 #else
 115 #define twl_has_watchdog()        false
 116 #endif
 117
 118 #if defined(CONFIG_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_MODULE) ||\
 119         defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
 120 #define twl_has_codec() true
 121 #else
 122 #define twl_has_codec() false
 123 #endif
 124
 125 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 126 #define twl_has_bci()   true
 127 #else
 128 #define twl_has_bci()   false
 129 #endif
 130
 131 /* Triton Core internal information (BEGIN) */
 132
 133 /* Last - for index max*/
 134 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 135
 136 #define TWL_NUM_SLAVES          4
 137
 138 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 139         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 140 #define twl_has_pwrbutton()     true
 141 #else
 142 #define twl_has_pwrbutton()     false
 143 #endif
 144
 145 #define SUB_CHIP_ID0 0
 146 #define SUB_CHIP_ID1 1
 147 #define SUB_CHIP_ID2 2
 148 #define SUB_CHIP_ID3 3
 149
 150 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 151
 152 #define TWL4030_NR_IRQS    8
 153 #define TWL6030_NR_IRQS    20
 154
 155 /* Base Address defns for twl4030_map[] */
 156
 157 /* subchip/slave 0 - USB ID */
 158 #define TWL4030_BASEADD_USB             0x0000
 159
 160 /* subchip/slave 1 - AUD ID */
 161 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 162 #define TWL4030_BASEADD_GPIO            0x0098
 163 #define TWL4030_BASEADD_INTBR           0x0085
 164 #define TWL4030_BASEADD_PIH             0x0080
 165 #define TWL4030_BASEADD_TEST            0x004C
 166
 167 /* subchip/slave 2 - AUX ID */
 168 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 169 #define TWL4030_BASEADD_LED             0x00EE
 170 #define TWL4030_BASEADD_MADC            0x0000
 171 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 172 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 173 #define TWL4030_BASEADD_PWM0            0x00F8
 174 #define TWL4030_BASEADD_PWM1            0x00FB
 175 #define TWL4030_BASEADD_PWMA            0x00EF
 176 #define TWL4030_BASEADD_PWMB            0x00F1
 177 #define TWL4030_BASEADD_KEYPAD          0x00D2
 178
 179 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 180 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 181                                                   one */
 182
 183 /* subchip/slave 3 - POWER ID */
 184 #define TWL4030_BASEADD_BACKUP          0x0014
 185 #define TWL4030_BASEADD_INT             0x002E
 186 #define TWL4030_BASEADD_PM_MASTER       0x0036
 187 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 188 #define TWL4030_BASEADD_RTC             0x001C
 189 #define TWL4030_BASEADD_SECURED_REG     0x0000
 190
 191 /* Triton Core internal information (END) */
 192
 193
 194 /* subchip/slave 0 0x48 - POWER */
 195 #define TWL6030_BASEADD_RTC             0x0000
 196 #define TWL6030_BASEADD_MEM             0x0017
 197 #define TWL6030_BASEADD_PM_MASTER       0x001F
 198 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 199 #define TWL6030_BASEADD_PM_MISC         0x00E2
 200 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 201
 202 /* subchip/slave 1 0x49 - FEATURE */
 203 #define TWL6030_BASEADD_USB             0x0000
 204 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 205 #define TWL6030_BASEADD_AUX             0x0090
 206 #define TWL6030_BASEADD_PWM             0x00BA
 207 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 208 #define TWL6030_BASEADD_PIH             0x00D0
 209 #define TWL6030_BASEADD_CHARGER         0x00E0
 210 #define TWL6025_BASEADD_CHARGER         0x00DA
 211
 212 /* subchip/slave 2 0x4A - DFT */
 213 #define TWL6030_BASEADD_DIEID           0x00C0
 214
 215 /* subchip/slave 3 0x4B - AUDIO */
 216 #define TWL6030_BASEADD_AUDIO           0x0000
 217 #define TWL6030_BASEADD_RSV             0x0000
 218 #define TWL6030_BASEADD_ZERO            0x0000
 219
 220 /* Few power values */
 221 #define R_CFG_BOOT                      0x05
 222
 223 /* some fields in R_CFG_BOOT */
 224 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 225 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 226 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 227 #define HIGH_PERF_SQ                    (1 << 3)
 228 #define CK32K_LOWPWR_EN                 (1 << 7)
 229
 230
 231 /* chip-specific feature flags, for i2c_device_id.driver_data */
 232 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 233 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 234 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 235 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 236
 237 /*----------------------------------------------------------------------*/
 238
 239 /* is driver active, bound to a chip? */
 240 static bool inuse;
 241
 242 /* TWL IDCODE Register value */
 243 static u32 twl_idcode;
 244
 245 static unsigned int twl_id;
 246 unsigned int twl_rev(void)
 247 {
 248         return twl_id;
 249 }
 250 EXPORT_SYMBOL(twl_rev);
 251
 252 /* Structure for each TWL4030/TWL6030 Slave */
 253 struct twl_client {
 254         struct i2c_client *client;
 255         u8 address;
 256
 257         /* max numb of i2c_msg required is for read =2 */
 258         struct i2c_msg xfer_msg[2];
 259
 260         /* To lock access to xfer_msg */
 261         struct mutex xfer_lock;
 262 };
 263
 264 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 265
 266 #ifdef CONFIG_IRQ_DOMAIN
 267 static struct irq_domain domain;
 268 #endif
 269
 270 /* mapping the module id to slave id and base address */
 271 struct twl_mapping {
 272         unsigned char sid;      /* Slave ID */
 273         unsigned char base;     /* base address */
 274 };
 275 static struct twl_mapping *twl_map;
 276
 277 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 278         /*
 279          * NOTE:  don't change this table without updating the
 280          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 281          * so they continue to match the order in this table.
 282          */
 283
 284         { 0, TWL4030_BASEADD_USB },
 285
 286         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 287         { 1, TWL4030_BASEADD_GPIO },
 288         { 1, TWL4030_BASEADD_INTBR },
 289         { 1, TWL4030_BASEADD_PIH },
 290         { 1, TWL4030_BASEADD_TEST },
 291
 292         { 2, TWL4030_BASEADD_KEYPAD },
 293         { 2, TWL4030_BASEADD_MADC },
 294         { 2, TWL4030_BASEADD_INTERRUPTS },
 295         { 2, TWL4030_BASEADD_LED },
 296         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 297         { 2, TWL4030_BASEADD_PRECHARGE },
 298         { 2, TWL4030_BASEADD_PWM0 },
 299         { 2, TWL4030_BASEADD_PWM1 },
 300         { 2, TWL4030_BASEADD_PWMA },
 301         { 2, TWL4030_BASEADD_PWMB },
 302         { 2, TWL5031_BASEADD_ACCESSORY },
 303         { 2, TWL5031_BASEADD_INTERRUPTS },
 304
 305         { 3, TWL4030_BASEADD_BACKUP },
 306         { 3, TWL4030_BASEADD_INT },
 307         { 3, TWL4030_BASEADD_PM_MASTER },
 308         { 3, TWL4030_BASEADD_PM_RECEIVER },
 309         { 3, TWL4030_BASEADD_RTC },
 310         { 3, TWL4030_BASEADD_SECURED_REG },
 311 };
 312
 313 static struct twl_mapping twl6030_map[] = {
 314         /*
 315          * NOTE:  don't change this table without updating the
 316          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 317          * so they continue to match the order in this table.
 318          */
 319         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 320         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 321         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 322         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 323         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 324
 325         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 327         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 328         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 329         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 330
 331         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 332         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 333         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 334         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 335         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 336
 337         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 338         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 339         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 340         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 341         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 342         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 343         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 344
 345         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 346         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 347         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 348 };
 349
 350 /*----------------------------------------------------------------------*/
 351
 352 /* Exported Functions */
 353
 354 /**
 355  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 356  * @mod_no: module number
 357  * @value: an array of num_bytes+1 containing data to write
 358  * @reg: register address (just offset will do)
 359  * @num_bytes: number of bytes to transfer
 360  *
 361  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 362  * valid data starts at Offset 1.
 363  *
 364  * Returns the result of operation - 0 is success
 365  */
 366 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 367 {
 368         int ret;
 369         int sid;
 370         struct twl_client *twl;
 371         struct i2c_msg *msg;
 372
 373         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 374                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 375                 return -EPERM;
 376         }
 377         if (unlikely(!inuse)) {
 378                 pr_err("%s: not initialized\n", DRIVER_NAME);
 379                 return -EPERM;
 380         }
 381         sid = twl_map[mod_no].sid;
 382         twl = &twl_modules[sid];
 383
 384         mutex_lock(&twl->xfer_lock);
 385         /*
 386          * [MSG1]: fill the register address data
 387          * fill the data Tx buffer
 388          */
 389         msg = &twl->xfer_msg[0];
 390         msg->addr = twl->address;
 391         msg->len = num_bytes + 1;
 392         msg->flags = 0;
 393         msg->buf = value;
 394         /* over write the first byte of buffer with the register address */
 395         *value = twl_map[mod_no].base + reg;
 396         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 397         mutex_unlock(&twl->xfer_lock);
 398
 399         /* i2c_transfer returns number of messages transferred */
 400         if (ret != 1) {
 401                 pr_err("%s: i2c_write failed to transfer all messages\n",
 402                         DRIVER_NAME);
 403                 if (ret < 0)
 404                         return ret;
 405                 else
 406                         return -EIO;
 407         } else {
 408                 return 0;
 409         }
 410 }
 411 EXPORT_SYMBOL(twl_i2c_write);
 412
 413 /**
 414  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 415  * @mod_no: module number
 416  * @value: an array of num_bytes containing data to be read
 417  * @reg: register address (just offset will do)
 418  * @num_bytes: number of bytes to transfer
 419  *
 420  * Returns result of operation - num_bytes is success else failure.
 421  */
 422 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 423 {
 424         int ret;
 425         u8 val;
 426         int sid;
 427         struct twl_client *twl;
 428         struct i2c_msg *msg;
 429
 430         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 431                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 432                 return -EPERM;
 433         }
 434         if (unlikely(!inuse)) {
 435                 pr_err("%s: not initialized\n", DRIVER_NAME);
 436                 return -EPERM;
 437         }
 438         sid = twl_map[mod_no].sid;
 439         twl = &twl_modules[sid];
 440
 441         mutex_lock(&twl->xfer_lock);
 442         /* [MSG1] fill the register address data */
 443         msg = &twl->xfer_msg[0];
 444         msg->addr = twl->address;
 445         msg->len = 1;
 446         msg->flags = 0; /* Read the register value */
 447         val = twl_map[mod_no].base + reg;
 448         msg->buf = &val;
 449         /* [MSG2] fill the data rx buffer */
 450         msg = &twl->xfer_msg[1];
 451         msg->addr = twl->address;
 452         msg->flags = I2C_M_RD;  /* Read the register value */
 453         msg->len = num_bytes;   /* only n bytes */
 454         msg->buf = value;
 455         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 456         mutex_unlock(&twl->xfer_lock);
 457
 458         /* i2c_transfer returns number of messages transferred */
 459         if (ret != 2) {
 460                 pr_err("%s: i2c_read failed to transfer all messages\n",
 461                         DRIVER_NAME);
 462                 if (ret < 0)
 463                         return ret;
 464                 else
 465                         return -EIO;
 466         } else {
 467                 return 0;
 468         }
 469 }
 470 EXPORT_SYMBOL(twl_i2c_read);
 471
 472 /**
 473  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 474  * @mod_no: module number
 475  * @value: the value to be written 8 bit
 476  * @reg: register address (just offset will do)
 477  *
 478  * Returns result of operation - 0 is success
 479  */
 480 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 481 {
 482
 483         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 484         u8 temp_buffer[2] = { 0 };
 485         /* offset 1 contains the data */
 486         temp_buffer[1] = value;
 487         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 488 }
 489 EXPORT_SYMBOL(twl_i2c_write_u8);
 490
 491 /**
 492  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 493  * @mod_no: module number
 494  * @value: the value read 8 bit
 495  * @reg: register address (just offset will do)
 496  *
 497  * Returns result of operation - 0 is success
 498  */
 499 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 500 {
 501         return twl_i2c_read(mod_no, value, reg, 1);
 502 }
 503 EXPORT_SYMBOL(twl_i2c_read_u8);
 504
 505 /*----------------------------------------------------------------------*/
 506
 507 /**
 508  * twl_read_idcode_register - API to read the IDCODE register.
 509  *
 510  * Unlocks the IDCODE register and read the 32 bit value.
 511  */
 512 static int twl_read_idcode_register(void)
 513 {
 514         int err;
 515
 516         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 517                                                 REG_UNLOCK_TEST_REG);
 518         if (err) {
 519                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 520                 goto fail;
 521         }
 522
 523         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 524                                                 REG_IDCODE_7_0, 4);
 525         if (err) {
 526                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 527                 goto fail;
 528         }
 529
 530         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 531         if (err)
 532                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 533 fail:
 534         return err;
 535 }
 536
 537 /**
 538  * twl_get_type - API to get TWL Si type.
 539  *
 540  * Api to get the TWL Si type from IDCODE value.
 541  */
 542 int twl_get_type(void)
 543 {
 544         return TWL_SIL_TYPE(twl_idcode);
 545 }
 546 EXPORT_SYMBOL_GPL(twl_get_type);
 547
 548 /**
 549  * twl_get_version - API to get TWL Si version.
 550  *
 551  * Api to get the TWL Si version from IDCODE value.
 552  */
 553 int twl_get_version(void)
 554 {
 555         return TWL_SIL_REV(twl_idcode);
 556 }
 557 EXPORT_SYMBOL_GPL(twl_get_version);
 558
 559 static struct device *
 560 add_numbered_child(unsigned chip, const char *name, int num,
 561                 void *pdata, unsigned pdata_len,
 562                 bool can_wakeup, int irq0, int irq1)
 563 {
 564         struct platform_device  *pdev;
 565         struct twl_client       *twl = &twl_modules[chip];
 566         int                     status;
 567
 568         pdev = platform_device_alloc(name, num);
 569         if (!pdev) {
 570                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 571                 status = -ENOMEM;
 572                 goto err;
 573         }
 574
 575         device_init_wakeup(&pdev->dev, can_wakeup);
 576         pdev->dev.parent = &twl->client->dev;
 577
 578         if (pdata) {
 579                 status = platform_device_add_data(pdev, pdata, pdata_len);
 580                 if (status < 0) {
 581                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 582                         goto err;
 583                 }
 584         }
 585
 586         if (irq0) {
 587                 struct resource r[2] = {
 588                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 589                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 590                 };
 591
 592                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 593                 if (status < 0) {
 594                         dev_dbg(&pdev->dev, "can't add irqs\n");
 595                         goto err;
 596                 }
 597         }
 598
 599         status = platform_device_add(pdev);
 600
 601 err:
 602         if (status < 0) {
 603                 platform_device_put(pdev);
 604                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 605                 return ERR_PTR(status);
 606         }
 607         return &pdev->dev;
 608 }
 609
 610 static inline struct device *add_child(unsigned chip, const char *name,
 611                 void *pdata, unsigned pdata_len,
 612                 bool can_wakeup, int irq0, int irq1)
 613 {
 614         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 615                 can_wakeup, irq0, irq1);
 616 }
 617
 618 static struct device *
 619 add_regulator_linked(int num, struct regulator_init_data *pdata,
 620                 struct regulator_consumer_supply *consumers,
 621                 unsigned num_consumers, unsigned long features)
 622 {
 623         unsigned sub_chip_id;
 624         /* regulator framework demands init_data ... */
 625         if (!pdata)
 626                 return NULL;
 627
 628         if (consumers) {
 629                 pdata->consumer_supplies = consumers;
 630                 pdata->num_consumer_supplies = num_consumers;
 631         }
 632
 633         pdata->driver_data = (void *)features;
 634
 635         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 636         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 637         return add_numbered_child(sub_chip_id, "twl_reg", num,
 638                 pdata, sizeof(*pdata), false, 0, 0);
 639 }
 640
 641 static struct device *
 642 add_regulator(int num, struct regulator_init_data *pdata,
 643                 unsigned long features)
 644 {
 645         return add_regulator_linked(num, pdata, NULL, 0, features);
 646 }
 647
 648 /*
 649  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 650  * for the PIH, and the next are for the PWR_INT SIH, since
 651  * that's how twl_init_irq() sets things up.
 652  */
 653
 654 static int
 655 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 656 {
 657         struct device   *child;
 658         unsigned sub_chip_id;
 659
 660         if (twl_has_gpio() && pdata->gpio) {
 661                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 662                                 pdata->gpio, sizeof(*pdata->gpio),
 663                                 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
 664                 if (IS_ERR(child))
 665                         return PTR_ERR(child);
 666         }
 667
 668         if (twl_has_keypad() && pdata->keypad) {
 669                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 670                                 pdata->keypad, sizeof(*pdata->keypad),
 671                                 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
 672                 if (IS_ERR(child))
 673                         return PTR_ERR(child);
 674         }
 675
 676         if (twl_has_madc() && pdata->madc) {
 677                 child = add_child(2, "twl4030_madc",
 678                                 pdata->madc, sizeof(*pdata->madc),
 679                                 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
 680                 if (IS_ERR(child))
 681                         return PTR_ERR(child);
 682         }
 683
 684         if (twl_has_rtc()) {
 685                 /*
 686                  * REVISIT platform_data here currently might expose the
 687                  * "msecure" line ... but for now we just expect board
 688                  * setup to tell the chip "it's always ok to SET_TIME".
 689                  * Eventually, Linux might become more aware of such
 690                  * HW security concerns, and "least privilege".
 691                  */
 692                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 693                 child = add_child(sub_chip_id, "twl_rtc",
 694                                 NULL, 0,
 695                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
 696                 if (IS_ERR(child))
 697                         return PTR_ERR(child);
 698         }
 699
 700         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 701
 702                 static struct regulator_consumer_supply usb1v5 = {
 703                         .supply =       "usb1v5",
 704                 };
 705                 static struct regulator_consumer_supply usb1v8 = {
 706                         .supply =       "usb1v8",
 707                 };
 708                 static struct regulator_consumer_supply usb3v1 = {
 709                         .supply =       "usb3v1",
 710                 };
 711
 712         /* First add the regulators so that they can be used by transceiver */
 713                 if (twl_has_regulator()) {
 714                         /* this is a template that gets copied */
 715                         struct regulator_init_data usb_fixed = {
 716                                 .constraints.valid_modes_mask =
 717                                         REGULATOR_MODE_NORMAL
 718                                         | REGULATOR_MODE_STANDBY,
 719                                 .constraints.valid_ops_mask =
 720                                         REGULATOR_CHANGE_MODE
 721                                         | REGULATOR_CHANGE_STATUS,
 722                         };
 723
 724                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 725                                                       &usb_fixed, &usb1v5, 1,
 726                                                       features);
 727                         if (IS_ERR(child))
 728                                 return PTR_ERR(child);
 729
 730                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 731                                                       &usb_fixed, &usb1v8, 1,
 732                                                       features);
 733                         if (IS_ERR(child))
 734                                 return PTR_ERR(child);
 735
 736                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 737                                                       &usb_fixed, &usb3v1, 1,
 738                                                       features);
 739                         if (IS_ERR(child))
 740                                 return PTR_ERR(child);
 741
 742                 }
 743
 744                 child = add_child(0, "twl4030_usb",
 745                                 pdata->usb, sizeof(*pdata->usb),
 746                                 true,
 747                                 /* irq0 = USB_PRES, irq1 = USB */
 748                                 pdata->irq_base + USB_PRES_INTR_OFFSET,
 749                                 pdata->irq_base + USB_INTR_OFFSET);
 750
 751                 if (IS_ERR(child))
 752                         return PTR_ERR(child);
 753
 754                 /* we need to connect regulators to this transceiver */
 755                 if (twl_has_regulator() && child) {
 756                         usb1v5.dev = child;
 757                         usb1v8.dev = child;
 758                         usb3v1.dev = child;
 759                 }
 760         }
 761         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 762
 763                 static struct regulator_consumer_supply usb3v3;
 764                 int regulator;
 765
 766                 if (twl_has_regulator()) {
 767                         /* this is a template that gets copied */
 768                         struct regulator_init_data usb_fixed = {
 769                                 .constraints.valid_modes_mask =
 770                                         REGULATOR_MODE_NORMAL
 771                                         | REGULATOR_MODE_STANDBY,
 772                                 .constraints.valid_ops_mask =
 773                                         REGULATOR_CHANGE_MODE
 774                                         | REGULATOR_CHANGE_STATUS,
 775                         };
 776
 777                         if (features & TWL6025_SUBCLASS) {
 778                                 usb3v3.supply = "ldousb";
 779                                 regulator = TWL6025_REG_LDOUSB;
 780                         } else {
 781                                 usb3v3.supply = "vusb";
 782                                 regulator = TWL6030_REG_VUSB;
 783                         }
 784                         child = add_regulator_linked(regulator, &usb_fixed,
 785                                                         &usb3v3, 1,
 786                                                         features);
 787                         if (IS_ERR(child))
 788                                 return PTR_ERR(child);
 789                 }
 790
 791                 pdata->usb->features = features;
 792
 793                 child = add_child(0, "twl6030_usb",
 794                         pdata->usb, sizeof(*pdata->usb),
 795                         true,
 796                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 797                         pdata->irq_base + USBOTG_INTR_OFFSET,
 798                         pdata->irq_base + USB_PRES_INTR_OFFSET);
 799
 800                 if (IS_ERR(child))
 801                         return PTR_ERR(child);
 802                 /* we need to connect regulators to this transceiver */
 803                 if (twl_has_regulator() && child)
 804                         usb3v3.dev = child;
 805         } else if (twl_has_regulator() && twl_class_is_6030()) {
 806                 if (features & TWL6025_SUBCLASS)
 807                         child = add_regulator(TWL6025_REG_LDOUSB,
 808                                                 pdata->ldousb, features);
 809                 else
 810                         child = add_regulator(TWL6030_REG_VUSB,
 811                                                 pdata->vusb, features);
 812
 813                         if (IS_ERR(child))
 814                                         return PTR_ERR(child);
 815         }
 816
 817         if (twl_has_watchdog() && twl_class_is_4030()) {
 818                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 819                 if (IS_ERR(child))
 820                         return PTR_ERR(child);
 821         }
 822
 823         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 824                 child = add_child(1, "twl4030_pwrbutton",
 825                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 826                 if (IS_ERR(child))
 827                         return PTR_ERR(child);
 828         }
 829
 830         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 831                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 832                 child = add_child(sub_chip_id, "twl4030-audio",
 833                                 pdata->audio, sizeof(*pdata->audio),
 834                                 false, 0, 0);
 835                 if (IS_ERR(child))
 836                         return PTR_ERR(child);
 837         }
 838
 839         if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
 840                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 841                 child = add_child(sub_chip_id, "twl6040",
 842                                 pdata->audio, sizeof(*pdata->audio),
 843                                 false, 0, 0);
 844                 if (IS_ERR(child))
 845                         return PTR_ERR(child);
 846         }
 847
 848         /* twl4030 regulators */
 849         if (twl_has_regulator() && twl_class_is_4030()) {
 850                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 851                                         features);
 852                 if (IS_ERR(child))
 853                         return PTR_ERR(child);
 854
 855                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 856                                         features);
 857                 if (IS_ERR(child))
 858                         return PTR_ERR(child);
 859
 860                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 861                                         features);
 862                 if (IS_ERR(child))
 863                         return PTR_ERR(child);
 864
 865                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 866                                         features);
 867                 if (IS_ERR(child))
 868                         return PTR_ERR(child);
 869
 870                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 871                                         features);
 872                 if (IS_ERR(child))
 873                         return PTR_ERR(child);
 874
 875                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 876                                         features);
 877                 if (IS_ERR(child))
 878                         return PTR_ERR(child);
 879
 880                 child = add_regulator((features & TWL4030_VAUX2)
 881                                         ? TWL4030_REG_VAUX2_4030
 882                                         : TWL4030_REG_VAUX2,
 883                                 pdata->vaux2, features);
 884                 if (IS_ERR(child))
 885                         return PTR_ERR(child);
 886
 887                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 888                                         features);
 889                 if (IS_ERR(child))
 890                         return PTR_ERR(child);
 891
 892                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 893                                         features);
 894                 if (IS_ERR(child))
 895                         return PTR_ERR(child);
 896
 897                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 898                                         features);
 899                 if (IS_ERR(child))
 900                         return PTR_ERR(child);
 901         }
 902
 903         /* maybe add LDOs that are omitted on cost-reduced parts */
 904         if (twl_has_regulator() && !(features & TPS_SUBSET)
 905           && twl_class_is_4030()) {
 906                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 907                                         features);
 908                 if (IS_ERR(child))
 909                         return PTR_ERR(child);
 910
 911                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 912                                         features);
 913                 if (IS_ERR(child))
 914                         return PTR_ERR(child);
 915
 916                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 917                                         features);
 918                 if (IS_ERR(child))
 919                         return PTR_ERR(child);
 920
 921                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 922                                         features);
 923                 if (IS_ERR(child))
 924                         return PTR_ERR(child);
 925
 926                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 927                                         features);
 928                 if (IS_ERR(child))
 929                         return PTR_ERR(child);
 930
 931                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 932                                         features);
 933                 if (IS_ERR(child))
 934                         return PTR_ERR(child);
 935         }
 936
 937         /* twl6030 regulators */
 938         if (twl_has_regulator() && twl_class_is_6030() &&
 939                         !(features & TWL6025_SUBCLASS)) {
 940                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 941                                         features);
 942                 if (IS_ERR(child))
 943                         return PTR_ERR(child);
 944
 945                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 946                                         features);
 947                 if (IS_ERR(child))
 948                         return PTR_ERR(child);
 949
 950                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 951                                         features);
 952                 if (IS_ERR(child))
 953                         return PTR_ERR(child);
 954
 955                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 956                                         features);
 957                 if (IS_ERR(child))
 958                         return PTR_ERR(child);
 959
 960                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 961                                         features);
 962                 if (IS_ERR(child))
 963                         return PTR_ERR(child);
 964
 965                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 966                                         features);
 967                 if (IS_ERR(child))
 968                         return PTR_ERR(child);
 969
 970                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
 971                                         features);
 972                 if (IS_ERR(child))
 973                         return PTR_ERR(child);
 974
 975                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
 976                                         features);
 977                 if (IS_ERR(child))
 978                         return PTR_ERR(child);
 979
 980                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
 981                                         features);
 982                 if (IS_ERR(child))
 983                         return PTR_ERR(child);
 984         }
 985
 986         /* 6030 and 6025 share this regulator */
 987         if (twl_has_regulator() && twl_class_is_6030()) {
 988                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
 989                                         features);
 990                 if (IS_ERR(child))
 991                         return PTR_ERR(child);
 992         }
 993
 994         /* twl6025 regulators */
 995         if (twl_has_regulator() && twl_class_is_6030() &&
 996                         (features & TWL6025_SUBCLASS)) {
 997                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
 998                                         features);
 999                 if (IS_ERR(child))
1000                         return PTR_ERR(child);
1001
1002                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1003                                         features);
1004                 if (IS_ERR(child))
1005                         return PTR_ERR(child);
1006
1007                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1008                                         features);
1009                 if (IS_ERR(child))
1010                         return PTR_ERR(child);
1011
1012                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1013                                         features);
1014                 if (IS_ERR(child))
1015                         return PTR_ERR(child);
1016
1017                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1018                                         features);
1019                 if (IS_ERR(child))
1020                         return PTR_ERR(child);
1021
1022                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1023                                         features);
1024                 if (IS_ERR(child))
1025                         return PTR_ERR(child);
1026
1027                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1028                                         features);
1029                 if (IS_ERR(child))
1030                         return PTR_ERR(child);
1031
1032                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1033                                         features);
1034                 if (IS_ERR(child))
1035                         return PTR_ERR(child);
1036
1037                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1038                                         features);
1039                 if (IS_ERR(child))
1040                         return PTR_ERR(child);
1041
1042                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1043                                         features);
1044                 if (IS_ERR(child))
1045                         return PTR_ERR(child);
1046
1047                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1048                                         features);
1049                 if (IS_ERR(child))
1050                         return PTR_ERR(child);
1051
1052         }
1053
1054         if (twl_has_bci() && pdata->bci &&
1055                         !(features & (TPS_SUBSET | TWL5031))) {
1056                 child = add_child(3, "twl4030_bci",
1057                                 pdata->bci, sizeof(*pdata->bci), false,
1058                                 /* irq0 = CHG_PRES, irq1 = BCI */
1059                                 pdata->irq_base + BCI_PRES_INTR_OFFSET,
1060                                 pdata->irq_base + BCI_INTR_OFFSET);
1061                 if (IS_ERR(child))
1062                         return PTR_ERR(child);
1063         }
1064
1065         return 0;
1066 }
1067
1068 /*----------------------------------------------------------------------*/
1069
1070 /*
1071  * These three functions initialize the on-chip clock framework,
1072  * letting it generate the right frequencies for USB, MADC, and
1073  * other purposes.
1074  */
1075 static inline int __init protect_pm_master(void)
1076 {
1077         int e = 0;
1078
1079         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1080                         TWL4030_PM_MASTER_PROTECT_KEY);
1081         return e;
1082 }
1083
1084 static inline int __init unprotect_pm_master(void)
1085 {
1086         int e = 0;
1087
1088         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1089                         TWL4030_PM_MASTER_KEY_CFG1,
1090                         TWL4030_PM_MASTER_PROTECT_KEY);
1091         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1092                         TWL4030_PM_MASTER_KEY_CFG2,
1093                         TWL4030_PM_MASTER_PROTECT_KEY);
1094
1095         return e;
1096 }
1097
1098 static void clocks_init(struct device *dev,
1099                         struct twl4030_clock_init_data *clock)
1100 {
1101         int e = 0;
1102         struct clk *osc;
1103         u32 rate;
1104         u8 ctrl = HFCLK_FREQ_26_MHZ;
1105
1106 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1107         if (cpu_is_omap2430())
1108                 osc = clk_get(dev, "osc_ck");
1109         else
1110                 osc = clk_get(dev, "osc_sys_ck");
1111
1112         if (IS_ERR(osc)) {
1113                 printk(KERN_WARNING "Skipping twl internal clock init and "
1114                                 "using bootloader value (unknown osc rate)\n");
1115                 return;
1116         }
1117
1118         rate = clk_get_rate(osc);
1119         clk_put(osc);
1120
1121 #else
1122         /* REVISIT for non-OMAP systems, pass the clock rate from
1123          * board init code, using platform_data.
1124          */
1125         osc = ERR_PTR(-EIO);
1126
1127         printk(KERN_WARNING "Skipping twl internal clock init and "
1128                "using bootloader value (unknown osc rate)\n");
1129
1130         return;
1131 #endif
1132
1133         switch (rate) {
1134         case 19200000:
1135                 ctrl = HFCLK_FREQ_19p2_MHZ;
1136                 break;
1137         case 26000000:
1138                 ctrl = HFCLK_FREQ_26_MHZ;
1139                 break;
1140         case 38400000:
1141                 ctrl = HFCLK_FREQ_38p4_MHZ;
1142                 break;
1143         }
1144
1145         ctrl |= HIGH_PERF_SQ;
1146         if (clock && clock->ck32k_lowpwr_enable)
1147                 ctrl |= CK32K_LOWPWR_EN;
1148
1149         e |= unprotect_pm_master();
1150         /* effect->MADC+USB ck en */
1151         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1152         e |= protect_pm_master();
1153
1154         if (e < 0)
1155                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1156 }
1157
1158 /*----------------------------------------------------------------------*/
1159
1160 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1161 int twl4030_exit_irq(void);
1162 int twl4030_init_chip_irq(const char *chip);
1163 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1164 int twl6030_exit_irq(void);
1165
1166 static int twl_remove(struct i2c_client *client)
1167 {
1168         unsigned i;
1169         int status;
1170
1171         if (twl_class_is_4030())
1172                 status = twl4030_exit_irq();
1173         else
1174                 status = twl6030_exit_irq();
1175
1176         if (status < 0)
1177                 return status;
1178
1179         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1180                 struct twl_client       *twl = &twl_modules[i];
1181
1182                 if (twl->client && twl->client != client)
1183                         i2c_unregister_device(twl->client);
1184                 twl_modules[i].client = NULL;
1185         }
1186         inuse = false;
1187         return 0;
1188 }
1189
1190 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
1191 static int __devinit
1192 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1193 {
1194         int                             status;
1195         unsigned                        i;
1196         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1197         struct device_node              *node = client->dev.of_node;
1198         u8 temp;
1199         int ret = 0;
1200         int nr_irqs = TWL4030_NR_IRQS;
1201
1202         if ((id->driver_data) & TWL6030_CLASS)
1203                 nr_irqs = TWL6030_NR_IRQS;
1204
1205         if (node && !pdata) {
1206                 /*
1207                  * XXX: Temporary pdata until the information is correctly
1208                  * retrieved by every TWL modules from DT.
1209                  */
1210                 pdata = devm_kzalloc(&client->dev,
1211                                      sizeof(struct twl4030_platform_data),
1212                                      GFP_KERNEL);
1213                 if (!pdata)
1214                         return -ENOMEM;
1215         }
1216
1217         if (!pdata) {
1218                 dev_dbg(&client->dev, "no platform data?\n");
1219                 return -EINVAL;
1220         }
1221
1222         status = irq_alloc_descs(-1, pdata->irq_base, nr_irqs, 0);
1223         if (IS_ERR_VALUE(status)) {
1224                 dev_err(&client->dev, "Fail to allocate IRQ descs\n");
1225                 return status;
1226         }
1227
1228         pdata->irq_base = status;
1229         pdata->irq_end = pdata->irq_base + nr_irqs;
1230
1231 #ifdef CONFIG_IRQ_DOMAIN
1232         domain.irq_base = pdata->irq_base;
1233         domain.nr_irq = nr_irqs;
1234         domain.of_node = of_node_get(node);
1235         domain.ops = &irq_domain_simple_ops;
1236         irq_domain_add(&domain);
1237 #endif
1238
1239         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1240                 dev_dbg(&client->dev, "can't talk I2C?\n");
1241                 return -EIO;
1242         }
1243
1244         if (inuse) {
1245                 dev_dbg(&client->dev, "driver is already in use\n");
1246                 return -EBUSY;
1247         }
1248
1249         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1250                 struct twl_client       *twl = &twl_modules[i];
1251
1252                 twl->address = client->addr + i;
1253                 if (i == 0)
1254                         twl->client = client;
1255                 else {
1256                         twl->client = i2c_new_dummy(client->adapter,
1257                                         twl->address);
1258                         if (!twl->client) {
1259                                 dev_err(&client->dev,
1260                                         "can't attach client %d\n", i);
1261                                 status = -ENOMEM;
1262                                 goto fail;
1263                         }
1264                 }
1265                 mutex_init(&twl->xfer_lock);
1266         }
1267         inuse = true;
1268         if ((id->driver_data) & TWL6030_CLASS) {
1269                 twl_id = TWL6030_CLASS_ID;
1270                 twl_map = &twl6030_map[0];
1271         } else {
1272                 twl_id = TWL4030_CLASS_ID;
1273                 twl_map = &twl4030_map[0];
1274         }
1275
1276         /* setup clock framework */
1277         clocks_init(&client->dev, pdata->clock);
1278
1279         /* read TWL IDCODE Register */
1280         if (twl_id == TWL4030_CLASS_ID) {
1281                 ret = twl_read_idcode_register();
1282                 WARN(ret < 0, "Error: reading twl_idcode register value\n");
1283         }
1284
1285         /* load power event scripts */
1286         if (twl_has_power() && pdata->power)
1287                 twl4030_power_init(pdata->power);
1288
1289         /* Maybe init the T2 Interrupt subsystem */
1290         if (client->irq
1291                         && pdata->irq_base
1292                         && pdata->irq_end > pdata->irq_base) {
1293                 if (twl_class_is_4030()) {
1294                         twl4030_init_chip_irq(id->name);
1295                         status = twl4030_init_irq(client->irq, pdata->irq_base,
1296                         pdata->irq_end);
1297                 } else {
1298                         status = twl6030_init_irq(client->irq, pdata->irq_base,
1299                         pdata->irq_end);
1300                 }
1301
1302                 if (status < 0)
1303                         goto fail;
1304         }
1305
1306         /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1307          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1308          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1309          */
1310
1311         if (twl_class_is_4030()) {
1312                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1313                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1314                 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1315                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1316         }
1317
1318 #ifdef CONFIG_OF_DEVICE
1319         if (node)
1320                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1321         else
1322 #endif
1323                 status = add_children(pdata, id->driver_data);
1324
1325 fail:
1326         if (status < 0)
1327                 twl_remove(client);
1328         return status;
1329 }
1330
1331 static const struct i2c_device_id twl_ids[] = {
1332         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1333         { "twl5030", 0 },               /* T2 updated */
1334         { "twl5031", TWL5031 },         /* TWL5030 updated */
1335         { "tps65950", 0 },              /* catalog version of twl5030 */
1336         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1337         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1338         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1339                                            and vibrator. Charger in USB module*/
1340         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1341         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1342         { /* end of list */ },
1343 };
1344 MODULE_DEVICE_TABLE(i2c, twl_ids);
1345
1346 /* One Client Driver , 4 Clients */
1347 static struct i2c_driver twl_driver = {
1348         .driver.name    = DRIVER_NAME,
1349         .id_table       = twl_ids,
1350         .probe          = twl_probe,
1351         .remove         = twl_remove,
1352 };
1353
1354 static int __init twl_init(void)
1355 {
1356         return i2c_add_driver(&twl_driver);
1357 }
1358 subsys_initcall(twl_init);
1359
1360 static void __exit twl_exit(void)
1361 {
1362         i2c_del_driver(&twl_driver);
1363 }
1364 module_exit(twl_exit);
1365
1366 MODULE_AUTHOR("Texas Instruments, Inc.");
1367 MODULE_DESCRIPTION("I2C Core interface for TWL");
1368 MODULE_LICENSE("GPL");