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 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  93 #define twl_has_rtc()   true
  94 #else
  95 #define twl_has_rtc()   false
  96 #endif
  97
  98 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
  99 #define twl_has_usb()   true
 100 #else
 101 #define twl_has_usb()   false
 102 #endif
 103
 104 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 105         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 106 #define twl_has_watchdog()        true
 107 #else
 108 #define twl_has_watchdog()        false
 109 #endif
 110
 111 /* Triton Core internal information (BEGIN) */
 112
 113 /* Last - for index max*/
 114 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 115
 116 #define TWL4030_NUM_SLAVES              4
 117
 118 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 119         || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
 120 #define twl_has_pwrbutton()     true
 121 #else
 122 #define twl_has_pwrbutton()     false
 123 #endif
 124
 125 /* Base Address defns for twl4030_map[] */
 126
 127 /* subchip/slave 0 - USB ID */
 128 #define TWL4030_BASEADD_USB             0x0000
 129
 130 /* subchip/slave 1 - AUD ID */
 131 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 132 #define TWL4030_BASEADD_GPIO            0x0098
 133 #define TWL4030_BASEADD_INTBR           0x0085
 134 #define TWL4030_BASEADD_PIH             0x0080
 135 #define TWL4030_BASEADD_TEST            0x004C
 136
 137 /* subchip/slave 2 - AUX ID */
 138 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 139 #define TWL4030_BASEADD_LED             0x00EE
 140 #define TWL4030_BASEADD_MADC            0x0000
 141 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 142 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 143 #define TWL4030_BASEADD_PWM0            0x00F8
 144 #define TWL4030_BASEADD_PWM1            0x00FB
 145 #define TWL4030_BASEADD_PWMA            0x00EF
 146 #define TWL4030_BASEADD_PWMB            0x00F1
 147 #define TWL4030_BASEADD_KEYPAD          0x00D2
 148
 149 /* subchip/slave 3 - POWER ID */
 150 #define TWL4030_BASEADD_BACKUP          0x0014
 151 #define TWL4030_BASEADD_INT             0x002E
 152 #define TWL4030_BASEADD_PM_MASTER       0x0036
 153 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 154 #define TWL4030_BASEADD_RTC             0x001C
 155 #define TWL4030_BASEADD_SECURED_REG     0x0000
 156
 157 /* Triton Core internal information (END) */
 158
 159
 160 /* Few power values */
 161 #define R_CFG_BOOT                      0x05
 162 #define R_PROTECT_KEY                   0x0E
 163
 164 /* access control values for R_PROTECT_KEY */
 165 #define KEY_UNLOCK1                     0xce
 166 #define KEY_UNLOCK2                     0xec
 167 #define KEY_LOCK                        0x00
 168
 169 /* some fields in R_CFG_BOOT */
 170 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 171 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 172 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 173 #define HIGH_PERF_SQ                    (1 << 3)
 174
 175
 176 /* chip-specific feature flags, for i2c_device_id.driver_data */
 177 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 178 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 179
 180 /*----------------------------------------------------------------------*/
 181
 182 /* is driver active, bound to a chip? */
 183 static bool inuse;
 184
 185 /* Structure for each TWL4030 Slave */
 186 struct twl4030_client {
 187         struct i2c_client *client;
 188         u8 address;
 189
 190         /* max numb of i2c_msg required is for read =2 */
 191         struct i2c_msg xfer_msg[2];
 192
 193         /* To lock access to xfer_msg */
 194         struct mutex xfer_lock;
 195 };
 196
 197 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
 198
 199
 200 /* mapping the module id to slave id and base address */
 201 struct twl4030mapping {
 202         unsigned char sid;      /* Slave ID */
 203         unsigned char base;     /* base address */
 204 };
 205
 206 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 207         /*
 208          * NOTE:  don't change this table without updating the
 209          * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
 210          * so they continue to match the order in this table.
 211          */
 212
 213         { 0, TWL4030_BASEADD_USB },
 214
 215         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 216         { 1, TWL4030_BASEADD_GPIO },
 217         { 1, TWL4030_BASEADD_INTBR },
 218         { 1, TWL4030_BASEADD_PIH },
 219         { 1, TWL4030_BASEADD_TEST },
 220
 221         { 2, TWL4030_BASEADD_KEYPAD },
 222         { 2, TWL4030_BASEADD_MADC },
 223         { 2, TWL4030_BASEADD_INTERRUPTS },
 224         { 2, TWL4030_BASEADD_LED },
 225         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 226         { 2, TWL4030_BASEADD_PRECHARGE },
 227         { 2, TWL4030_BASEADD_PWM0 },
 228         { 2, TWL4030_BASEADD_PWM1 },
 229         { 2, TWL4030_BASEADD_PWMA },
 230         { 2, TWL4030_BASEADD_PWMB },
 231
 232         { 3, TWL4030_BASEADD_BACKUP },
 233         { 3, TWL4030_BASEADD_INT },
 234         { 3, TWL4030_BASEADD_PM_MASTER },
 235         { 3, TWL4030_BASEADD_PM_RECEIVER },
 236         { 3, TWL4030_BASEADD_RTC },
 237         { 3, TWL4030_BASEADD_SECURED_REG },
 238 };
 239
 240 /*----------------------------------------------------------------------*/
 241
 242 /* Exported Functions */
 243
 244 /**
 245  * twl4030_i2c_write - Writes a n bit register in TWL4030
 246  * @mod_no: module number
 247  * @value: an array of num_bytes+1 containing data to write
 248  * @reg: register address (just offset will do)
 249  * @num_bytes: number of bytes to transfer
 250  *
 251  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 252  * valid data starts at Offset 1.
 253  *
 254  * Returns the result of operation - 0 is success
 255  */
 256 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 257 {
 258         int ret;
 259         int sid;
 260         struct twl4030_client *twl;
 261         struct i2c_msg *msg;
 262
 263         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 264                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 265                 return -EPERM;
 266         }
 267         sid = twl4030_map[mod_no].sid;
 268         twl = &twl4030_modules[sid];
 269
 270         if (unlikely(!inuse)) {
 271                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 272                 return -EPERM;
 273         }
 274         mutex_lock(&twl->xfer_lock);
 275         /*
 276          * [MSG1]: fill the register address data
 277          * fill the data Tx buffer
 278          */
 279         msg = &twl->xfer_msg[0];
 280         msg->addr = twl->address;
 281         msg->len = num_bytes + 1;
 282         msg->flags = 0;
 283         msg->buf = value;
 284         /* over write the first byte of buffer with the register address */
 285         *value = twl4030_map[mod_no].base + reg;
 286         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 287         mutex_unlock(&twl->xfer_lock);
 288
 289         /* i2cTransfer returns num messages.translate it pls.. */
 290         if (ret >= 0)
 291                 ret = 0;
 292         return ret;
 293 }
 294 EXPORT_SYMBOL(twl4030_i2c_write);
 295
 296 /**
 297  * twl4030_i2c_read - Reads a n bit register in TWL4030
 298  * @mod_no: module number
 299  * @value: an array of num_bytes containing data to be read
 300  * @reg: register address (just offset will do)
 301  * @num_bytes: number of bytes to transfer
 302  *
 303  * Returns result of operation - num_bytes is success else failure.
 304  */
 305 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 306 {
 307         int ret;
 308         u8 val;
 309         int sid;
 310         struct twl4030_client *twl;
 311         struct i2c_msg *msg;
 312
 313         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 314                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 315                 return -EPERM;
 316         }
 317         sid = twl4030_map[mod_no].sid;
 318         twl = &twl4030_modules[sid];
 319
 320         if (unlikely(!inuse)) {
 321                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 322                 return -EPERM;
 323         }
 324         mutex_lock(&twl->xfer_lock);
 325         /* [MSG1] fill the register address data */
 326         msg = &twl->xfer_msg[0];
 327         msg->addr = twl->address;
 328         msg->len = 1;
 329         msg->flags = 0; /* Read the register value */
 330         val = twl4030_map[mod_no].base + reg;
 331         msg->buf = &val;
 332         /* [MSG2] fill the data rx buffer */
 333         msg = &twl->xfer_msg[1];
 334         msg->addr = twl->address;
 335         msg->flags = I2C_M_RD;  /* Read the register value */
 336         msg->len = num_bytes;   /* only n bytes */
 337         msg->buf = value;
 338         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 339         mutex_unlock(&twl->xfer_lock);
 340
 341         /* i2cTransfer returns num messages.translate it pls.. */
 342         if (ret >= 0)
 343                 ret = 0;
 344         return ret;
 345 }
 346 EXPORT_SYMBOL(twl4030_i2c_read);
 347
 348 /**
 349  * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
 350  * @mod_no: module number
 351  * @value: the value to be written 8 bit
 352  * @reg: register address (just offset will do)
 353  *
 354  * Returns result of operation - 0 is success
 355  */
 356 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 357 {
 358
 359         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 360         u8 temp_buffer[2] = { 0 };
 361         /* offset 1 contains the data */
 362         temp_buffer[1] = value;
 363         return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
 364 }
 365 EXPORT_SYMBOL(twl4030_i2c_write_u8);
 366
 367 /**
 368  * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
 369  * @mod_no: module number
 370  * @value: the value read 8 bit
 371  * @reg: register address (just offset will do)
 372  *
 373  * Returns result of operation - 0 is success
 374  */
 375 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 376 {
 377         return twl4030_i2c_read(mod_no, value, reg, 1);
 378 }
 379 EXPORT_SYMBOL(twl4030_i2c_read_u8);
 380
 381 /*----------------------------------------------------------------------*/
 382
 383 static struct device *
 384 add_numbered_child(unsigned chip, const char *name, int num,
 385                 void *pdata, unsigned pdata_len,
 386                 bool can_wakeup, int irq0, int irq1)
 387 {
 388         struct platform_device  *pdev;
 389         struct twl4030_client   *twl = &twl4030_modules[chip];
 390         int                     status;
 391
 392         pdev = platform_device_alloc(name, num);
 393         if (!pdev) {
 394                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 395                 status = -ENOMEM;
 396                 goto err;
 397         }
 398
 399         device_init_wakeup(&pdev->dev, can_wakeup);
 400         pdev->dev.parent = &twl->client->dev;
 401
 402         if (pdata) {
 403                 status = platform_device_add_data(pdev, pdata, pdata_len);
 404                 if (status < 0) {
 405                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 406                         goto err;
 407                 }
 408         }
 409
 410         if (irq0) {
 411                 struct resource r[2] = {
 412                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 413                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 414                 };
 415
 416                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 417                 if (status < 0) {
 418                         dev_dbg(&pdev->dev, "can't add irqs\n");
 419                         goto err;
 420                 }
 421         }
 422
 423         status = platform_device_add(pdev);
 424
 425 err:
 426         if (status < 0) {
 427                 platform_device_put(pdev);
 428                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 429                 return ERR_PTR(status);
 430         }
 431         return &pdev->dev;
 432 }
 433
 434 static inline struct device *add_child(unsigned chip, const char *name,
 435                 void *pdata, unsigned pdata_len,
 436                 bool can_wakeup, int irq0, int irq1)
 437 {
 438         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 439                 can_wakeup, irq0, irq1);
 440 }
 441
 442 static struct device *
 443 add_regulator_linked(int num, struct regulator_init_data *pdata,
 444                 struct regulator_consumer_supply *consumers,
 445                 unsigned num_consumers)
 446 {
 447         /* regulator framework demands init_data ... */
 448         if (!pdata)
 449                 return NULL;
 450
 451         if (consumers) {
 452                 pdata->consumer_supplies = consumers;
 453                 pdata->num_consumer_supplies = num_consumers;
 454         }
 455
 456         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 457         return add_numbered_child(3, "twl4030_reg", num,
 458                 pdata, sizeof(*pdata), false, 0, 0);
 459 }
 460
 461 static struct device *
 462 add_regulator(int num, struct regulator_init_data *pdata)
 463 {
 464         return add_regulator_linked(num, pdata, NULL, 0);
 465 }
 466
 467 /*
 468  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 469  * for the PIH, and the next are for the PWR_INT SIH, since
 470  * that's how twl_init_irq() sets things up.
 471  */
 472
 473 static int
 474 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 475 {
 476         struct device   *child;
 477         struct device   *usb_transceiver = NULL;
 478
 479         if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
 480                 child = add_child(3, "twl4030_bci",
 481                                 pdata->bci, sizeof(*pdata->bci),
 482                                 false,
 483                                 /* irq0 = CHG_PRES, irq1 = BCI */
 484                                 pdata->irq_base + 8 + 1, pdata->irq_base + 2);
 485                 if (IS_ERR(child))
 486                         return PTR_ERR(child);
 487         }
 488
 489         if (twl_has_gpio() && pdata->gpio) {
 490                 child = add_child(1, "twl4030_gpio",
 491                                 pdata->gpio, sizeof(*pdata->gpio),
 492                                 false, pdata->irq_base + 0, 0);
 493                 if (IS_ERR(child))
 494                         return PTR_ERR(child);
 495         }
 496
 497         if (twl_has_keypad() && pdata->keypad) {
 498                 child = add_child(2, "twl4030_keypad",
 499                                 pdata->keypad, sizeof(*pdata->keypad),
 500                                 true, pdata->irq_base + 1, 0);
 501                 if (IS_ERR(child))
 502                         return PTR_ERR(child);
 503         }
 504
 505         if (twl_has_madc() && pdata->madc) {
 506                 child = add_child(2, "twl4030_madc",
 507                                 pdata->madc, sizeof(*pdata->madc),
 508                                 true, pdata->irq_base + 3, 0);
 509                 if (IS_ERR(child))
 510                         return PTR_ERR(child);
 511         }
 512
 513         if (twl_has_rtc()) {
 514                 /*
 515                  * REVISIT platform_data here currently might expose the
 516                  * "msecure" line ... but for now we just expect board
 517                  * setup to tell the chip "it's always ok to SET_TIME".
 518                  * Eventually, Linux might become more aware of such
 519                  * HW security concerns, and "least privilege".
 520                  */
 521                 child = add_child(3, "twl4030_rtc",
 522                                 NULL, 0,
 523                                 true, pdata->irq_base + 8 + 3, 0);
 524                 if (IS_ERR(child))
 525                         return PTR_ERR(child);
 526         }
 527
 528         if (twl_has_usb() && pdata->usb) {
 529                 child = add_child(0, "twl4030_usb",
 530                                 pdata->usb, sizeof(*pdata->usb),
 531                                 true,
 532                                 /* irq0 = USB_PRES, irq1 = USB */
 533                                 pdata->irq_base + 8 + 2, pdata->irq_base + 4);
 534                 if (IS_ERR(child))
 535                         return PTR_ERR(child);
 536
 537                 /* we need to connect regulators to this transceiver */
 538                 usb_transceiver = child;
 539         }
 540
 541         if (twl_has_watchdog()) {
 542                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 543                 if (IS_ERR(child))
 544                         return PTR_ERR(child);
 545         }
 546
 547         if (twl_has_pwrbutton()) {
 548                 child = add_child(1, "twl4030_pwrbutton",
 549                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 550                 if (IS_ERR(child))
 551                         return PTR_ERR(child);
 552         }
 553
 554         if (twl_has_regulator()) {
 555                 /*
 556                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 557                 if (IS_ERR(child))
 558                         return PTR_ERR(child);
 559                 */
 560
 561                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 562                 if (IS_ERR(child))
 563                         return PTR_ERR(child);
 564
 565                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 566                 if (IS_ERR(child))
 567                         return PTR_ERR(child);
 568
 569                 child = add_regulator((features & TWL4030_VAUX2)
 570                                         ? TWL4030_REG_VAUX2_4030
 571                                         : TWL4030_REG_VAUX2,
 572                                 pdata->vaux2);
 573                 if (IS_ERR(child))
 574                         return PTR_ERR(child);
 575         }
 576
 577         if (twl_has_regulator() && usb_transceiver) {
 578                 static struct regulator_consumer_supply usb1v5 = {
 579                         .supply =       "usb1v5",
 580                 };
 581                 static struct regulator_consumer_supply usb1v8 = {
 582                         .supply =       "usb1v8",
 583                 };
 584                 static struct regulator_consumer_supply usb3v1 = {
 585                         .supply =       "usb3v1",
 586                 };
 587
 588                 /* this is a template that gets copied */
 589                 struct regulator_init_data usb_fixed = {
 590                         .constraints.valid_modes_mask =
 591                                   REGULATOR_MODE_NORMAL
 592                                 | REGULATOR_MODE_STANDBY,
 593                         .constraints.valid_ops_mask =
 594                                   REGULATOR_CHANGE_MODE
 595                                 | REGULATOR_CHANGE_STATUS,
 596                 };
 597
 598                 usb1v5.dev = usb_transceiver;
 599                 usb1v8.dev = usb_transceiver;
 600                 usb3v1.dev = usb_transceiver;
 601
 602                 child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed,
 603                                 &usb1v5, 1);
 604                 if (IS_ERR(child))
 605                         return PTR_ERR(child);
 606
 607                 child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed,
 608                                 &usb1v8, 1);
 609                 if (IS_ERR(child))
 610                         return PTR_ERR(child);
 611
 612                 child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed,
 613                                 &usb3v1, 1);
 614                 if (IS_ERR(child))
 615                         return PTR_ERR(child);
 616         }
 617
 618         /* maybe add LDOs that are omitted on cost-reduced parts */
 619         if (twl_has_regulator() && !(features & TPS_SUBSET)) {
 620                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 621                 if (IS_ERR(child))
 622                         return PTR_ERR(child);
 623
 624                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 625                 if (IS_ERR(child))
 626                         return PTR_ERR(child);
 627
 628                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 629                 if (IS_ERR(child))
 630                         return PTR_ERR(child);
 631
 632                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 633                 if (IS_ERR(child))
 634                         return PTR_ERR(child);
 635
 636                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 637                 if (IS_ERR(child))
 638                         return PTR_ERR(child);
 639
 640                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 641                 if (IS_ERR(child))
 642                         return PTR_ERR(child);
 643         }
 644
 645         return 0;
 646 }
 647
 648 /*----------------------------------------------------------------------*/
 649
 650 /*
 651  * These three functions initialize the on-chip clock framework,
 652  * letting it generate the right frequencies for USB, MADC, and
 653  * other purposes.
 654  */
 655 static inline int __init protect_pm_master(void)
 656 {
 657         int e = 0;
 658
 659         e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
 660                         R_PROTECT_KEY);
 661         return e;
 662 }
 663
 664 static inline int __init unprotect_pm_master(void)
 665 {
 666         int e = 0;
 667
 668         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
 669                         R_PROTECT_KEY);
 670         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
 671                         R_PROTECT_KEY);
 672         return e;
 673 }
 674
 675 static void clocks_init(struct device *dev)
 676 {
 677         int e = 0;
 678         struct clk *osc;
 679         u32 rate;
 680         u8 ctrl = HFCLK_FREQ_26_MHZ;
 681
 682 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 683         if (cpu_is_omap2430())
 684                 osc = clk_get(dev, "osc_ck");
 685         else
 686                 osc = clk_get(dev, "osc_sys_ck");
 687
 688         if (IS_ERR(osc)) {
 689                 printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 690                                 "using bootloader value (unknown osc rate)\n");
 691                 return;
 692         }
 693
 694         rate = clk_get_rate(osc);
 695         clk_put(osc);
 696
 697 #else
 698         /* REVISIT for non-OMAP systems, pass the clock rate from
 699          * board init code, using platform_data.
 700          */
 701         osc = ERR_PTR(-EIO);
 702
 703         printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 704                "using bootloader value (unknown osc rate)\n");
 705
 706         return;
 707 #endif
 708
 709         switch (rate) {
 710         case 19200000:
 711                 ctrl = HFCLK_FREQ_19p2_MHZ;
 712                 break;
 713         case 26000000:
 714                 ctrl = HFCLK_FREQ_26_MHZ;
 715                 break;
 716         case 38400000:
 717                 ctrl = HFCLK_FREQ_38p4_MHZ;
 718                 break;
 719         }
 720
 721         ctrl |= HIGH_PERF_SQ;
 722         e |= unprotect_pm_master();
 723         /* effect->MADC+USB ck en */
 724         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 725         e |= protect_pm_master();
 726
 727         if (e < 0)
 728                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 729 }
 730
 731 /*----------------------------------------------------------------------*/
 732
 733 int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 734 int twl_exit_irq(void);
 735
 736 static int twl4030_remove(struct i2c_client *client)
 737 {
 738         unsigned i;
 739         int status;
 740
 741         status = twl_exit_irq();
 742         if (status < 0)
 743                 return status;
 744
 745         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 746                 struct twl4030_client   *twl = &twl4030_modules[i];
 747
 748                 if (twl->client && twl->client != client)
 749                         i2c_unregister_device(twl->client);
 750                 twl4030_modules[i].client = NULL;
 751         }
 752         inuse = false;
 753         return 0;
 754 }
 755
 756 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 757 static int
 758 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 759 {
 760         int                             status;
 761         unsigned                        i;
 762         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 763
 764         if (!pdata) {
 765                 dev_dbg(&client->dev, "no platform data?\n");
 766                 return -EINVAL;
 767         }
 768
 769         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 770                 dev_dbg(&client->dev, "can't talk I2C?\n");
 771                 return -EIO;
 772         }
 773
 774         if (inuse) {
 775                 dev_dbg(&client->dev, "driver is already in use\n");
 776                 return -EBUSY;
 777         }
 778
 779         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 780                 struct twl4030_client   *twl = &twl4030_modules[i];
 781
 782                 twl->address = client->addr + i;
 783                 if (i == 0)
 784                         twl->client = client;
 785                 else {
 786                         twl->client = i2c_new_dummy(client->adapter,
 787                                         twl->address);
 788                         if (!twl->client) {
 789                                 dev_err(&twl->client->dev,
 790                                         "can't attach client %d\n", i);
 791                                 status = -ENOMEM;
 792                                 goto fail;
 793                         }
 794                         strlcpy(twl->client->name, id->name,
 795                                         sizeof(twl->client->name));
 796                 }
 797                 mutex_init(&twl->xfer_lock);
 798         }
 799         inuse = true;
 800
 801         /* setup clock framework */
 802         clocks_init(&client->dev);
 803
 804         /* Maybe init the T2 Interrupt subsystem */
 805         if (client->irq
 806                         && pdata->irq_base
 807                         && pdata->irq_end > pdata->irq_base) {
 808                 status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
 809                 if (status < 0)
 810                         goto fail;
 811         }
 812
 813         status = add_children(pdata, id->driver_data);
 814 fail:
 815         if (status < 0)
 816                 twl4030_remove(client);
 817         return status;
 818 }
 819
 820 static const struct i2c_device_id twl4030_ids[] = {
 821         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
 822         { "twl5030", 0 },               /* T2 updated */
 823         { "tps65950", 0 },              /* catalog version of twl5030 */
 824         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
 825         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
 826         { /* end of list */ },
 827 };
 828 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
 829
 830 /* One Client Driver , 4 Clients */
 831 static struct i2c_driver twl4030_driver = {
 832         .driver.name    = DRIVER_NAME,
 833         .id_table       = twl4030_ids,
 834         .probe          = twl4030_probe,
 835         .remove         = twl4030_remove,
 836 };
 837
 838 static int __init twl4030_init(void)
 839 {
 840         return i2c_add_driver(&twl4030_driver);
 841 }
 842 subsys_initcall(twl4030_init);
 843
 844 static void __exit twl4030_exit(void)
 845 {
 846         i2c_del_driver(&twl4030_driver);
 847 }
 848 module_exit(twl4030_exit);
 849
 850 MODULE_AUTHOR("Texas Instruments, Inc.");
 851 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
 852 MODULE_LICENSE("GPL");