drivers/mfd/twl4030-core.c

   1 /*
   2  * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices
   3  *
   4  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   5  *
   6  * Modifications to defer interrupt handling to a kernel thread:
   7  * Copyright (C) 2006 MontaVista Software, Inc.
   8  *
   9  * Based on tlv320aic23.c:
  10  * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
  11  *
  12  * Code cleanup and modifications to IRQ handler.
  13  * by syed khasim <x0khasim@ti.com>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  28  */
  29
  30 #include <linux/init.h>
  31 #include <linux/mutex.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/clk.h>
  34 #include <linux/err.h>
  35
  36 #include <linux/regulator/machine.h>
  37
  38 #include <linux/i2c.h>
  39 #include <linux/i2c/twl4030.h>
  40
  41 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  42 #include <mach/cpu.h>
  43 #endif
  44
  45 /*
  46  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  47  * Management and System Companion Device" chips originally designed for
  48  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  49  * often at around 3 Mbit/sec, including for interrupt handling.
  50  *
  51  * This driver core provides genirq support for the interrupts emitted,
  52  * by the various modules, and exports register access primitives.
  53  *
  54  * FIXME this driver currently requires use of the first interrupt line
  55  * (and associated registers).
  56  */
  57
  58 #define DRIVER_NAME                     "twl4030"
  59
  60 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
  61         defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
  62 #define twl_has_bci()           true
  63 #else
  64 #define twl_has_bci()           false
  65 #endif
  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 #define twl_has_usb()   true
 106 #else
 107 #define twl_has_usb()   false
 108 #endif
 109
 110 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 111         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 112 #define twl_has_watchdog()        true
 113 #else
 114 #define twl_has_watchdog()        false
 115 #endif
 116
 117 /* Triton Core internal information (BEGIN) */
 118
 119 /* Last - for index max*/
 120 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 121
 122 #define TWL4030_NUM_SLAVES              4
 123
 124 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 125         || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
 126 #define twl_has_pwrbutton()     true
 127 #else
 128 #define twl_has_pwrbutton()     false
 129 #endif
 130
 131 /* Base Address defns for twl4030_map[] */
 132
 133 /* subchip/slave 0 - USB ID */
 134 #define TWL4030_BASEADD_USB             0x0000
 135
 136 /* subchip/slave 1 - AUD ID */
 137 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 138 #define TWL4030_BASEADD_GPIO            0x0098
 139 #define TWL4030_BASEADD_INTBR           0x0085
 140 #define TWL4030_BASEADD_PIH             0x0080
 141 #define TWL4030_BASEADD_TEST            0x004C
 142
 143 /* subchip/slave 2 - AUX ID */
 144 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 145 #define TWL4030_BASEADD_LED             0x00EE
 146 #define TWL4030_BASEADD_MADC            0x0000
 147 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 148 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 149 #define TWL4030_BASEADD_PWM0            0x00F8
 150 #define TWL4030_BASEADD_PWM1            0x00FB
 151 #define TWL4030_BASEADD_PWMA            0x00EF
 152 #define TWL4030_BASEADD_PWMB            0x00F1
 153 #define TWL4030_BASEADD_KEYPAD          0x00D2
 154
 155 /* subchip/slave 3 - POWER ID */
 156 #define TWL4030_BASEADD_BACKUP          0x0014
 157 #define TWL4030_BASEADD_INT             0x002E
 158 #define TWL4030_BASEADD_PM_MASTER       0x0036
 159 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 160 #define TWL4030_BASEADD_RTC             0x001C
 161 #define TWL4030_BASEADD_SECURED_REG     0x0000
 162
 163 /* Triton Core internal information (END) */
 164
 165
 166 /* Few power values */
 167 #define R_CFG_BOOT                      0x05
 168 #define R_PROTECT_KEY                   0x0E
 169
 170 /* access control values for R_PROTECT_KEY */
 171 #define KEY_UNLOCK1                     0xce
 172 #define KEY_UNLOCK2                     0xec
 173 #define KEY_LOCK                        0x00
 174
 175 /* some fields in R_CFG_BOOT */
 176 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 177 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 178 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 179 #define HIGH_PERF_SQ                    (1 << 3)
 180
 181
 182 /* chip-specific feature flags, for i2c_device_id.driver_data */
 183 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 184 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 185
 186 /*----------------------------------------------------------------------*/
 187
 188 /* is driver active, bound to a chip? */
 189 static bool inuse;
 190
 191 /* Structure for each TWL4030 Slave */
 192 struct twl4030_client {
 193         struct i2c_client *client;
 194         u8 address;
 195
 196         /* max numb of i2c_msg required is for read =2 */
 197         struct i2c_msg xfer_msg[2];
 198
 199         /* To lock access to xfer_msg */
 200         struct mutex xfer_lock;
 201 };
 202
 203 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
 204
 205
 206 /* mapping the module id to slave id and base address */
 207 struct twl4030mapping {
 208         unsigned char sid;      /* Slave ID */
 209         unsigned char base;     /* base address */
 210 };
 211
 212 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 213         /*
 214          * NOTE:  don't change this table without updating the
 215          * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
 216          * so they continue to match the order in this table.
 217          */
 218
 219         { 0, TWL4030_BASEADD_USB },
 220
 221         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 222         { 1, TWL4030_BASEADD_GPIO },
 223         { 1, TWL4030_BASEADD_INTBR },
 224         { 1, TWL4030_BASEADD_PIH },
 225         { 1, TWL4030_BASEADD_TEST },
 226
 227         { 2, TWL4030_BASEADD_KEYPAD },
 228         { 2, TWL4030_BASEADD_MADC },
 229         { 2, TWL4030_BASEADD_INTERRUPTS },
 230         { 2, TWL4030_BASEADD_LED },
 231         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 232         { 2, TWL4030_BASEADD_PRECHARGE },
 233         { 2, TWL4030_BASEADD_PWM0 },
 234         { 2, TWL4030_BASEADD_PWM1 },
 235         { 2, TWL4030_BASEADD_PWMA },
 236         { 2, TWL4030_BASEADD_PWMB },
 237
 238         { 3, TWL4030_BASEADD_BACKUP },
 239         { 3, TWL4030_BASEADD_INT },
 240         { 3, TWL4030_BASEADD_PM_MASTER },
 241         { 3, TWL4030_BASEADD_PM_RECEIVER },
 242         { 3, TWL4030_BASEADD_RTC },
 243         { 3, TWL4030_BASEADD_SECURED_REG },
 244 };
 245
 246 /*----------------------------------------------------------------------*/
 247
 248 /* Exported Functions */
 249
 250 /**
 251  * twl4030_i2c_write - Writes a n bit register in TWL4030
 252  * @mod_no: module number
 253  * @value: an array of num_bytes+1 containing data to write
 254  * @reg: register address (just offset will do)
 255  * @num_bytes: number of bytes to transfer
 256  *
 257  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 258  * valid data starts at Offset 1.
 259  *
 260  * Returns the result of operation - 0 is success
 261  */
 262 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 263 {
 264         int ret;
 265         int sid;
 266         struct twl4030_client *twl;
 267         struct i2c_msg *msg;
 268
 269         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 270                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 271                 return -EPERM;
 272         }
 273         sid = twl4030_map[mod_no].sid;
 274         twl = &twl4030_modules[sid];
 275
 276         if (unlikely(!inuse)) {
 277                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 278                 return -EPERM;
 279         }
 280         mutex_lock(&twl->xfer_lock);
 281         /*
 282          * [MSG1]: fill the register address data
 283          * fill the data Tx buffer
 284          */
 285         msg = &twl->xfer_msg[0];
 286         msg->addr = twl->address;
 287         msg->len = num_bytes + 1;
 288         msg->flags = 0;
 289         msg->buf = value;
 290         /* over write the first byte of buffer with the register address */
 291         *value = twl4030_map[mod_no].base + reg;
 292         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 293         mutex_unlock(&twl->xfer_lock);
 294
 295         /* i2cTransfer returns num messages.translate it pls.. */
 296         if (ret >= 0)
 297                 ret = 0;
 298         return ret;
 299 }
 300 EXPORT_SYMBOL(twl4030_i2c_write);
 301
 302 /**
 303  * twl4030_i2c_read - Reads a n bit register in TWL4030
 304  * @mod_no: module number
 305  * @value: an array of num_bytes containing data to be read
 306  * @reg: register address (just offset will do)
 307  * @num_bytes: number of bytes to transfer
 308  *
 309  * Returns result of operation - num_bytes is success else failure.
 310  */
 311 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 312 {
 313         int ret;
 314         u8 val;
 315         int sid;
 316         struct twl4030_client *twl;
 317         struct i2c_msg *msg;
 318
 319         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 320                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 321                 return -EPERM;
 322         }
 323         sid = twl4030_map[mod_no].sid;
 324         twl = &twl4030_modules[sid];
 325
 326         if (unlikely(!inuse)) {
 327                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 328                 return -EPERM;
 329         }
 330         mutex_lock(&twl->xfer_lock);
 331         /* [MSG1] fill the register address data */
 332         msg = &twl->xfer_msg[0];
 333         msg->addr = twl->address;
 334         msg->len = 1;
 335         msg->flags = 0; /* Read the register value */
 336         val = twl4030_map[mod_no].base + reg;
 337         msg->buf = &val;
 338         /* [MSG2] fill the data rx buffer */
 339         msg = &twl->xfer_msg[1];
 340         msg->addr = twl->address;
 341         msg->flags = I2C_M_RD;  /* Read the register value */
 342         msg->len = num_bytes;   /* only n bytes */
 343         msg->buf = value;
 344         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 345         mutex_unlock(&twl->xfer_lock);
 346
 347         /* i2cTransfer returns num messages.translate it pls.. */
 348         if (ret >= 0)
 349                 ret = 0;
 350         return ret;
 351 }
 352 EXPORT_SYMBOL(twl4030_i2c_read);
 353
 354 /**
 355  * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
 356  * @mod_no: module number
 357  * @value: the value to be written 8 bit
 358  * @reg: register address (just offset will do)
 359  *
 360  * Returns result of operation - 0 is success
 361  */
 362 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 363 {
 364
 365         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 366         u8 temp_buffer[2] = { 0 };
 367         /* offset 1 contains the data */
 368         temp_buffer[1] = value;
 369         return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
 370 }
 371 EXPORT_SYMBOL(twl4030_i2c_write_u8);
 372
 373 /**
 374  * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
 375  * @mod_no: module number
 376  * @value: the value read 8 bit
 377  * @reg: register address (just offset will do)
 378  *
 379  * Returns result of operation - 0 is success
 380  */
 381 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 382 {
 383         return twl4030_i2c_read(mod_no, value, reg, 1);
 384 }
 385 EXPORT_SYMBOL(twl4030_i2c_read_u8);
 386
 387 /*----------------------------------------------------------------------*/
 388
 389 static struct device *
 390 add_numbered_child(unsigned chip, const char *name, int num,
 391                 void *pdata, unsigned pdata_len,
 392                 bool can_wakeup, int irq0, int irq1)
 393 {
 394         struct platform_device  *pdev;
 395         struct twl4030_client   *twl = &twl4030_modules[chip];
 396         int                     status;
 397
 398         pdev = platform_device_alloc(name, num);
 399         if (!pdev) {
 400                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 401                 status = -ENOMEM;
 402                 goto err;
 403         }
 404
 405         device_init_wakeup(&pdev->dev, can_wakeup);
 406         pdev->dev.parent = &twl->client->dev;
 407
 408         if (pdata) {
 409                 status = platform_device_add_data(pdev, pdata, pdata_len);
 410                 if (status < 0) {
 411                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 412                         goto err;
 413                 }
 414         }
 415
 416         if (irq0) {
 417                 struct resource r[2] = {
 418                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 419                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 420                 };
 421
 422                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 423                 if (status < 0) {
 424                         dev_dbg(&pdev->dev, "can't add irqs\n");
 425                         goto err;
 426                 }
 427         }
 428
 429         status = platform_device_add(pdev);
 430
 431 err:
 432         if (status < 0) {
 433                 platform_device_put(pdev);
 434                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 435                 return ERR_PTR(status);
 436         }
 437         return &pdev->dev;
 438 }
 439
 440 static inline struct device *add_child(unsigned chip, const char *name,
 441                 void *pdata, unsigned pdata_len,
 442                 bool can_wakeup, int irq0, int irq1)
 443 {
 444         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 445                 can_wakeup, irq0, irq1);
 446 }
 447
 448 static struct device *
 449 add_regulator_linked(int num, struct regulator_init_data *pdata,
 450                 struct regulator_consumer_supply *consumers,
 451                 unsigned num_consumers)
 452 {
 453         /* regulator framework demands init_data ... */
 454         if (!pdata)
 455                 return NULL;
 456
 457         if (consumers) {
 458                 pdata->consumer_supplies = consumers;
 459                 pdata->num_consumer_supplies = num_consumers;
 460         }
 461
 462         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 463         return add_numbered_child(3, "twl4030_reg", num,
 464                 pdata, sizeof(*pdata), false, 0, 0);
 465 }
 466
 467 static struct device *
 468 add_regulator(int num, struct regulator_init_data *pdata)
 469 {
 470         return add_regulator_linked(num, pdata, NULL, 0);
 471 }
 472
 473 /*
 474  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 475  * for the PIH, and the next are for the PWR_INT SIH, since
 476  * that's how twl_init_irq() sets things up.
 477  */
 478
 479 static int
 480 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 481 {
 482         struct device   *child;
 483         struct device   *usb_transceiver = NULL;
 484
 485         if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
 486                 child = add_child(3, "twl4030_bci",
 487                                 pdata->bci, sizeof(*pdata->bci),
 488                                 false,
 489                                 /* irq0 = CHG_PRES, irq1 = BCI */
 490                                 pdata->irq_base + 8 + 1, pdata->irq_base + 2);
 491                 if (IS_ERR(child))
 492                         return PTR_ERR(child);
 493         }
 494
 495         if (twl_has_gpio() && pdata->gpio) {
 496                 child = add_child(1, "twl4030_gpio",
 497                                 pdata->gpio, sizeof(*pdata->gpio),
 498                                 false, pdata->irq_base + 0, 0);
 499                 if (IS_ERR(child))
 500                         return PTR_ERR(child);
 501         }
 502
 503         if (twl_has_keypad() && pdata->keypad) {
 504                 child = add_child(2, "twl4030_keypad",
 505                                 pdata->keypad, sizeof(*pdata->keypad),
 506                                 true, pdata->irq_base + 1, 0);
 507                 if (IS_ERR(child))
 508                         return PTR_ERR(child);
 509         }
 510
 511         if (twl_has_madc() && pdata->madc) {
 512                 child = add_child(2, "twl4030_madc",
 513                                 pdata->madc, sizeof(*pdata->madc),
 514                                 true, pdata->irq_base + 3, 0);
 515                 if (IS_ERR(child))
 516                         return PTR_ERR(child);
 517         }
 518
 519         if (twl_has_rtc()) {
 520                 /*
 521                  * REVISIT platform_data here currently might expose the
 522                  * "msecure" line ... but for now we just expect board
 523                  * setup to tell the chip "it's always ok to SET_TIME".
 524                  * Eventually, Linux might become more aware of such
 525                  * HW security concerns, and "least privilege".
 526                  */
 527                 child = add_child(3, "twl4030_rtc",
 528                                 NULL, 0,
 529                                 true, pdata->irq_base + 8 + 3, 0);
 530                 if (IS_ERR(child))
 531                         return PTR_ERR(child);
 532         }
 533
 534         if (twl_has_usb() && pdata->usb) {
 535                 child = add_child(0, "twl4030_usb",
 536                                 pdata->usb, sizeof(*pdata->usb),
 537                                 true,
 538                                 /* irq0 = USB_PRES, irq1 = USB */
 539                                 pdata->irq_base + 8 + 2, pdata->irq_base + 4);
 540                 if (IS_ERR(child))
 541                         return PTR_ERR(child);
 542
 543                 /* we need to connect regulators to this transceiver */
 544                 usb_transceiver = child;
 545         }
 546
 547         if (twl_has_watchdog()) {
 548                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 549                 if (IS_ERR(child))
 550                         return PTR_ERR(child);
 551         }
 552
 553         if (twl_has_pwrbutton()) {
 554                 child = add_child(1, "twl4030_pwrbutton",
 555                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 556                 if (IS_ERR(child))
 557                         return PTR_ERR(child);
 558         }
 559
 560         if (twl_has_regulator()) {
 561                 /*
 562                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 563                 if (IS_ERR(child))
 564                         return PTR_ERR(child);
 565                 */
 566
 567                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 568                 if (IS_ERR(child))
 569                         return PTR_ERR(child);
 570
 571                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 572                 if (IS_ERR(child))
 573                         return PTR_ERR(child);
 574
 575                 child = add_regulator((features & TWL4030_VAUX2)
 576                                         ? TWL4030_REG_VAUX2_4030
 577                                         : TWL4030_REG_VAUX2,
 578                                 pdata->vaux2);
 579                 if (IS_ERR(child))
 580                         return PTR_ERR(child);
 581         }
 582
 583         if (twl_has_regulator() && usb_transceiver) {
 584                 static struct regulator_consumer_supply usb1v5 = {
 585                         .supply =       "usb1v5",
 586                 };
 587                 static struct regulator_consumer_supply usb1v8 = {
 588                         .supply =       "usb1v8",
 589                 };
 590                 static struct regulator_consumer_supply usb3v1 = {
 591                         .supply =       "usb3v1",
 592                 };
 593
 594                 /* this is a template that gets copied */
 595                 struct regulator_init_data usb_fixed = {
 596                         .constraints.valid_modes_mask =
 597                                   REGULATOR_MODE_NORMAL
 598                                 | REGULATOR_MODE_STANDBY,
 599                         .constraints.valid_ops_mask =
 600                                   REGULATOR_CHANGE_MODE
 601                                 | REGULATOR_CHANGE_STATUS,
 602                 };
 603
 604                 usb1v5.dev = usb_transceiver;
 605                 usb1v8.dev = usb_transceiver;
 606                 usb3v1.dev = usb_transceiver;
 607
 608                 child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed,
 609                                 &usb1v5, 1);
 610                 if (IS_ERR(child))
 611                         return PTR_ERR(child);
 612
 613                 child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed,
 614                                 &usb1v8, 1);
 615                 if (IS_ERR(child))
 616                         return PTR_ERR(child);
 617
 618                 child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed,
 619                                 &usb3v1, 1);
 620                 if (IS_ERR(child))
 621                         return PTR_ERR(child);
 622         }
 623
 624         /* maybe add LDOs that are omitted on cost-reduced parts */
 625         if (twl_has_regulator() && !(features & TPS_SUBSET)) {
 626                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 627                 if (IS_ERR(child))
 628                         return PTR_ERR(child);
 629
 630                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 631                 if (IS_ERR(child))
 632                         return PTR_ERR(child);
 633
 634                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 635                 if (IS_ERR(child))
 636                         return PTR_ERR(child);
 637
 638                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 639                 if (IS_ERR(child))
 640                         return PTR_ERR(child);
 641
 642                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 643                 if (IS_ERR(child))
 644                         return PTR_ERR(child);
 645
 646                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 647                 if (IS_ERR(child))
 648                         return PTR_ERR(child);
 649         }
 650
 651         return 0;
 652 }
 653
 654 /*----------------------------------------------------------------------*/
 655
 656 /*
 657  * These three functions initialize the on-chip clock framework,
 658  * letting it generate the right frequencies for USB, MADC, and
 659  * other purposes.
 660  */
 661 static inline int __init protect_pm_master(void)
 662 {
 663         int e = 0;
 664
 665         e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
 666                         R_PROTECT_KEY);
 667         return e;
 668 }
 669
 670 static inline int __init unprotect_pm_master(void)
 671 {
 672         int e = 0;
 673
 674         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
 675                         R_PROTECT_KEY);
 676         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
 677                         R_PROTECT_KEY);
 678         return e;
 679 }
 680
 681 static void clocks_init(struct device *dev)
 682 {
 683         int e = 0;
 684         struct clk *osc;
 685         u32 rate;
 686         u8 ctrl = HFCLK_FREQ_26_MHZ;
 687
 688 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 689         if (cpu_is_omap2430())
 690                 osc = clk_get(dev, "osc_ck");
 691         else
 692                 osc = clk_get(dev, "osc_sys_ck");
 693
 694         if (IS_ERR(osc)) {
 695                 printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 696                                 "using bootloader value (unknown osc rate)\n");
 697                 return;
 698         }
 699
 700         rate = clk_get_rate(osc);
 701         clk_put(osc);
 702
 703 #else
 704         /* REVISIT for non-OMAP systems, pass the clock rate from
 705          * board init code, using platform_data.
 706          */
 707         osc = ERR_PTR(-EIO);
 708
 709         printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 710                "using bootloader value (unknown osc rate)\n");
 711
 712         return;
 713 #endif
 714
 715         switch (rate) {
 716         case 19200000:
 717                 ctrl = HFCLK_FREQ_19p2_MHZ;
 718                 break;
 719         case 26000000:
 720                 ctrl = HFCLK_FREQ_26_MHZ;
 721                 break;
 722         case 38400000:
 723                 ctrl = HFCLK_FREQ_38p4_MHZ;
 724                 break;
 725         }
 726
 727         ctrl |= HIGH_PERF_SQ;
 728         e |= unprotect_pm_master();
 729         /* effect->MADC+USB ck en */
 730         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 731         e |= protect_pm_master();
 732
 733         if (e < 0)
 734                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 735 }
 736
 737 /*----------------------------------------------------------------------*/
 738
 739 int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 740 int twl_exit_irq(void);
 741
 742 static int twl4030_remove(struct i2c_client *client)
 743 {
 744         unsigned i;
 745         int status;
 746
 747         status = twl_exit_irq();
 748         if (status < 0)
 749                 return status;
 750
 751         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 752                 struct twl4030_client   *twl = &twl4030_modules[i];
 753
 754                 if (twl->client && twl->client != client)
 755                         i2c_unregister_device(twl->client);
 756                 twl4030_modules[i].client = NULL;
 757         }
 758         inuse = false;
 759         return 0;
 760 }
 761
 762 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 763 static int
 764 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 765 {
 766         int                             status;
 767         unsigned                        i;
 768         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 769
 770         if (!pdata) {
 771                 dev_dbg(&client->dev, "no platform data?\n");
 772                 return -EINVAL;
 773         }
 774
 775         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 776                 dev_dbg(&client->dev, "can't talk I2C?\n");
 777                 return -EIO;
 778         }
 779
 780         if (inuse) {
 781                 dev_dbg(&client->dev, "driver is already in use\n");
 782                 return -EBUSY;
 783         }
 784
 785         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 786                 struct twl4030_client   *twl = &twl4030_modules[i];
 787
 788                 twl->address = client->addr + i;
 789                 if (i == 0)
 790                         twl->client = client;
 791                 else {
 792                         twl->client = i2c_new_dummy(client->adapter,
 793                                         twl->address);
 794                         if (!twl->client) {
 795                                 dev_err(&twl->client->dev,
 796                                         "can't attach client %d\n", i);
 797                                 status = -ENOMEM;
 798                                 goto fail;
 799                         }
 800                         strlcpy(twl->client->name, id->name,
 801                                         sizeof(twl->client->name));
 802                 }
 803                 mutex_init(&twl->xfer_lock);
 804         }
 805         inuse = true;
 806
 807         /* setup clock framework */
 808         clocks_init(&client->dev);
 809
 810         /* load power event scripts */
 811         if (twl_has_power() && pdata->power)
 812                 twl4030_power_init(pdata->power);
 813
 814         /* Maybe init the T2 Interrupt subsystem */
 815         if (client->irq
 816                         && pdata->irq_base
 817                         && pdata->irq_end > pdata->irq_base) {
 818                 status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
 819                 if (status < 0)
 820                         goto fail;
 821         }
 822
 823         status = add_children(pdata, id->driver_data);
 824 fail:
 825         if (status < 0)
 826                 twl4030_remove(client);
 827         return status;
 828 }
 829
 830 static const struct i2c_device_id twl4030_ids[] = {
 831         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
 832         { "twl5030", 0 },               /* T2 updated */
 833         { "tps65950", 0 },              /* catalog version of twl5030 */
 834         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
 835         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
 836         { /* end of list */ },
 837 };
 838 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
 839
 840 /* One Client Driver , 4 Clients */
 841 static struct i2c_driver twl4030_driver = {
 842         .driver.name    = DRIVER_NAME,
 843         .id_table       = twl4030_ids,
 844         .probe          = twl4030_probe,
 845         .remove         = twl4030_remove,
 846 };
 847
 848 static int __init twl4030_init(void)
 849 {
 850         return i2c_add_driver(&twl4030_driver);
 851 }
 852 subsys_initcall(twl4030_init);
 853
 854 static void __exit twl4030_exit(void)
 855 {
 856         i2c_del_driver(&twl4030_driver);
 857 }
 858 module_exit(twl4030_exit);
 859
 860 MODULE_AUTHOR("Texas Instruments, Inc.");
 861 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
 862 MODULE_LICENSE("GPL");