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 <plat/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 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE)
 118 #define twl_has_codec() true
 119 #else
 120 #define twl_has_codec() false
 121 #endif
 122
 123 /* Triton Core internal information (BEGIN) */
 124
 125 /* Last - for index max*/
 126 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 127
 128 #define TWL4030_NUM_SLAVES              4
 129
 130 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 131         || defined(CONFIG_INPUT_TWL4030_PWBUTTON_MODULE)
 132 #define twl_has_pwrbutton()     true
 133 #else
 134 #define twl_has_pwrbutton()     false
 135 #endif
 136
 137 /* Base Address defns for twl4030_map[] */
 138
 139 /* subchip/slave 0 - USB ID */
 140 #define TWL4030_BASEADD_USB             0x0000
 141
 142 /* subchip/slave 1 - AUD ID */
 143 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 144 #define TWL4030_BASEADD_GPIO            0x0098
 145 #define TWL4030_BASEADD_INTBR           0x0085
 146 #define TWL4030_BASEADD_PIH             0x0080
 147 #define TWL4030_BASEADD_TEST            0x004C
 148
 149 /* subchip/slave 2 - AUX ID */
 150 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 151 #define TWL4030_BASEADD_LED             0x00EE
 152 #define TWL4030_BASEADD_MADC            0x0000
 153 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 154 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 155 #define TWL4030_BASEADD_PWM0            0x00F8
 156 #define TWL4030_BASEADD_PWM1            0x00FB
 157 #define TWL4030_BASEADD_PWMA            0x00EF
 158 #define TWL4030_BASEADD_PWMB            0x00F1
 159 #define TWL4030_BASEADD_KEYPAD          0x00D2
 160
 161 /* subchip/slave 3 - POWER ID */
 162 #define TWL4030_BASEADD_BACKUP          0x0014
 163 #define TWL4030_BASEADD_INT             0x002E
 164 #define TWL4030_BASEADD_PM_MASTER       0x0036
 165 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 166 #define TWL4030_BASEADD_RTC             0x001C
 167 #define TWL4030_BASEADD_SECURED_REG     0x0000
 168
 169 /* Triton Core internal information (END) */
 170
 171
 172 /* Few power values */
 173 #define R_CFG_BOOT                      0x05
 174 #define R_PROTECT_KEY                   0x0E
 175
 176 /* access control values for R_PROTECT_KEY */
 177 #define KEY_UNLOCK1                     0xce
 178 #define KEY_UNLOCK2                     0xec
 179 #define KEY_LOCK                        0x00
 180
 181 /* some fields in R_CFG_BOOT */
 182 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 183 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 184 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 185 #define HIGH_PERF_SQ                    (1 << 3)
 186 #define CK32K_LOWPWR_EN                 (1 << 7)
 187
 188
 189 /* chip-specific feature flags, for i2c_device_id.driver_data */
 190 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 191 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 192
 193 /*----------------------------------------------------------------------*/
 194
 195 /* is driver active, bound to a chip? */
 196 static bool inuse;
 197
 198 /* Structure for each TWL4030 Slave */
 199 struct twl4030_client {
 200         struct i2c_client *client;
 201         u8 address;
 202
 203         /* max numb of i2c_msg required is for read =2 */
 204         struct i2c_msg xfer_msg[2];
 205
 206         /* To lock access to xfer_msg */
 207         struct mutex xfer_lock;
 208 };
 209
 210 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
 211
 212
 213 /* mapping the module id to slave id and base address */
 214 struct twl4030mapping {
 215         unsigned char sid;      /* Slave ID */
 216         unsigned char base;     /* base address */
 217 };
 218
 219 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 220         /*
 221          * NOTE:  don't change this table without updating the
 222          * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
 223          * so they continue to match the order in this table.
 224          */
 225
 226         { 0, TWL4030_BASEADD_USB },
 227
 228         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 229         { 1, TWL4030_BASEADD_GPIO },
 230         { 1, TWL4030_BASEADD_INTBR },
 231         { 1, TWL4030_BASEADD_PIH },
 232         { 1, TWL4030_BASEADD_TEST },
 233
 234         { 2, TWL4030_BASEADD_KEYPAD },
 235         { 2, TWL4030_BASEADD_MADC },
 236         { 2, TWL4030_BASEADD_INTERRUPTS },
 237         { 2, TWL4030_BASEADD_LED },
 238         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 239         { 2, TWL4030_BASEADD_PRECHARGE },
 240         { 2, TWL4030_BASEADD_PWM0 },
 241         { 2, TWL4030_BASEADD_PWM1 },
 242         { 2, TWL4030_BASEADD_PWMA },
 243         { 2, TWL4030_BASEADD_PWMB },
 244
 245         { 3, TWL4030_BASEADD_BACKUP },
 246         { 3, TWL4030_BASEADD_INT },
 247         { 3, TWL4030_BASEADD_PM_MASTER },
 248         { 3, TWL4030_BASEADD_PM_RECEIVER },
 249         { 3, TWL4030_BASEADD_RTC },
 250         { 3, TWL4030_BASEADD_SECURED_REG },
 251 };
 252
 253 /*----------------------------------------------------------------------*/
 254
 255 /* Exported Functions */
 256
 257 /**
 258  * twl4030_i2c_write - Writes a n bit register in TWL4030
 259  * @mod_no: module number
 260  * @value: an array of num_bytes+1 containing data to write
 261  * @reg: register address (just offset will do)
 262  * @num_bytes: number of bytes to transfer
 263  *
 264  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 265  * valid data starts at Offset 1.
 266  *
 267  * Returns the result of operation - 0 is success
 268  */
 269 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 270 {
 271         int ret;
 272         int sid;
 273         struct twl4030_client *twl;
 274         struct i2c_msg *msg;
 275
 276         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 277                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 278                 return -EPERM;
 279         }
 280         sid = twl4030_map[mod_no].sid;
 281         twl = &twl4030_modules[sid];
 282
 283         if (unlikely(!inuse)) {
 284                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 285                 return -EPERM;
 286         }
 287         mutex_lock(&twl->xfer_lock);
 288         /*
 289          * [MSG1]: fill the register address data
 290          * fill the data Tx buffer
 291          */
 292         msg = &twl->xfer_msg[0];
 293         msg->addr = twl->address;
 294         msg->len = num_bytes + 1;
 295         msg->flags = 0;
 296         msg->buf = value;
 297         /* over write the first byte of buffer with the register address */
 298         *value = twl4030_map[mod_no].base + reg;
 299         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 300         mutex_unlock(&twl->xfer_lock);
 301
 302         /* i2cTransfer returns num messages.translate it pls.. */
 303         if (ret >= 0)
 304                 ret = 0;
 305         return ret;
 306 }
 307 EXPORT_SYMBOL(twl4030_i2c_write);
 308
 309 /**
 310  * twl4030_i2c_read - Reads a n bit register in TWL4030
 311  * @mod_no: module number
 312  * @value: an array of num_bytes containing data to be read
 313  * @reg: register address (just offset will do)
 314  * @num_bytes: number of bytes to transfer
 315  *
 316  * Returns result of operation - num_bytes is success else failure.
 317  */
 318 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 319 {
 320         int ret;
 321         u8 val;
 322         int sid;
 323         struct twl4030_client *twl;
 324         struct i2c_msg *msg;
 325
 326         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 327                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 328                 return -EPERM;
 329         }
 330         sid = twl4030_map[mod_no].sid;
 331         twl = &twl4030_modules[sid];
 332
 333         if (unlikely(!inuse)) {
 334                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 335                 return -EPERM;
 336         }
 337         mutex_lock(&twl->xfer_lock);
 338         /* [MSG1] fill the register address data */
 339         msg = &twl->xfer_msg[0];
 340         msg->addr = twl->address;
 341         msg->len = 1;
 342         msg->flags = 0; /* Read the register value */
 343         val = twl4030_map[mod_no].base + reg;
 344         msg->buf = &val;
 345         /* [MSG2] fill the data rx buffer */
 346         msg = &twl->xfer_msg[1];
 347         msg->addr = twl->address;
 348         msg->flags = I2C_M_RD;  /* Read the register value */
 349         msg->len = num_bytes;   /* only n bytes */
 350         msg->buf = value;
 351         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 352         mutex_unlock(&twl->xfer_lock);
 353
 354         /* i2cTransfer returns num messages.translate it pls.. */
 355         if (ret >= 0)
 356                 ret = 0;
 357         return ret;
 358 }
 359 EXPORT_SYMBOL(twl4030_i2c_read);
 360
 361 /**
 362  * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
 363  * @mod_no: module number
 364  * @value: the value to be written 8 bit
 365  * @reg: register address (just offset will do)
 366  *
 367  * Returns result of operation - 0 is success
 368  */
 369 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 370 {
 371
 372         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 373         u8 temp_buffer[2] = { 0 };
 374         /* offset 1 contains the data */
 375         temp_buffer[1] = value;
 376         return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
 377 }
 378 EXPORT_SYMBOL(twl4030_i2c_write_u8);
 379
 380 /**
 381  * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
 382  * @mod_no: module number
 383  * @value: the value read 8 bit
 384  * @reg: register address (just offset will do)
 385  *
 386  * Returns result of operation - 0 is success
 387  */
 388 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 389 {
 390         return twl4030_i2c_read(mod_no, value, reg, 1);
 391 }
 392 EXPORT_SYMBOL(twl4030_i2c_read_u8);
 393
 394 /*----------------------------------------------------------------------*/
 395
 396 static struct device *
 397 add_numbered_child(unsigned chip, const char *name, int num,
 398                 void *pdata, unsigned pdata_len,
 399                 bool can_wakeup, int irq0, int irq1)
 400 {
 401         struct platform_device  *pdev;
 402         struct twl4030_client   *twl = &twl4030_modules[chip];
 403         int                     status;
 404
 405         pdev = platform_device_alloc(name, num);
 406         if (!pdev) {
 407                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 408                 status = -ENOMEM;
 409                 goto err;
 410         }
 411
 412         device_init_wakeup(&pdev->dev, can_wakeup);
 413         pdev->dev.parent = &twl->client->dev;
 414
 415         if (pdata) {
 416                 status = platform_device_add_data(pdev, pdata, pdata_len);
 417                 if (status < 0) {
 418                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 419                         goto err;
 420                 }
 421         }
 422
 423         if (irq0) {
 424                 struct resource r[2] = {
 425                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 426                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 427                 };
 428
 429                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 430                 if (status < 0) {
 431                         dev_dbg(&pdev->dev, "can't add irqs\n");
 432                         goto err;
 433                 }
 434         }
 435
 436         status = platform_device_add(pdev);
 437
 438 err:
 439         if (status < 0) {
 440                 platform_device_put(pdev);
 441                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 442                 return ERR_PTR(status);
 443         }
 444         return &pdev->dev;
 445 }
 446
 447 static inline struct device *add_child(unsigned chip, const char *name,
 448                 void *pdata, unsigned pdata_len,
 449                 bool can_wakeup, int irq0, int irq1)
 450 {
 451         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 452                 can_wakeup, irq0, irq1);
 453 }
 454
 455 static struct device *
 456 add_regulator_linked(int num, struct regulator_init_data *pdata,
 457                 struct regulator_consumer_supply *consumers,
 458                 unsigned num_consumers)
 459 {
 460         /* regulator framework demands init_data ... */
 461         if (!pdata)
 462                 return NULL;
 463
 464         if (consumers) {
 465                 pdata->consumer_supplies = consumers;
 466                 pdata->num_consumer_supplies = num_consumers;
 467         }
 468
 469         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 470         return add_numbered_child(3, "twl4030_reg", num,
 471                 pdata, sizeof(*pdata), false, 0, 0);
 472 }
 473
 474 static struct device *
 475 add_regulator(int num, struct regulator_init_data *pdata)
 476 {
 477         return add_regulator_linked(num, pdata, NULL, 0);
 478 }
 479
 480 /*
 481  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 482  * for the PIH, and the next are for the PWR_INT SIH, since
 483  * that's how twl_init_irq() sets things up.
 484  */
 485
 486 static int
 487 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 488 {
 489         struct device   *child;
 490
 491         if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
 492                 child = add_child(3, "twl4030_bci",
 493                                 pdata->bci, sizeof(*pdata->bci),
 494                                 false,
 495                                 /* irq0 = CHG_PRES, irq1 = BCI */
 496                                 pdata->irq_base + 8 + 1, pdata->irq_base + 2);
 497                 if (IS_ERR(child))
 498                         return PTR_ERR(child);
 499         }
 500
 501         if (twl_has_gpio() && pdata->gpio) {
 502                 child = add_child(1, "twl4030_gpio",
 503                                 pdata->gpio, sizeof(*pdata->gpio),
 504                                 false, pdata->irq_base + 0, 0);
 505                 if (IS_ERR(child))
 506                         return PTR_ERR(child);
 507         }
 508
 509         if (twl_has_keypad() && pdata->keypad) {
 510                 child = add_child(2, "twl4030_keypad",
 511                                 pdata->keypad, sizeof(*pdata->keypad),
 512                                 true, pdata->irq_base + 1, 0);
 513                 if (IS_ERR(child))
 514                         return PTR_ERR(child);
 515         }
 516
 517         if (twl_has_madc() && pdata->madc) {
 518                 child = add_child(2, "twl4030_madc",
 519                                 pdata->madc, sizeof(*pdata->madc),
 520                                 true, pdata->irq_base + 3, 0);
 521                 if (IS_ERR(child))
 522                         return PTR_ERR(child);
 523         }
 524
 525         if (twl_has_rtc()) {
 526                 /*
 527                  * REVISIT platform_data here currently might expose the
 528                  * "msecure" line ... but for now we just expect board
 529                  * setup to tell the chip "it's always ok to SET_TIME".
 530                  * Eventually, Linux might become more aware of such
 531                  * HW security concerns, and "least privilege".
 532                  */
 533                 child = add_child(3, "twl4030_rtc",
 534                                 NULL, 0,
 535                                 true, pdata->irq_base + 8 + 3, 0);
 536                 if (IS_ERR(child))
 537                         return PTR_ERR(child);
 538         }
 539
 540         if (twl_has_usb() && pdata->usb) {
 541
 542                 static struct regulator_consumer_supply usb1v5 = {
 543                         .supply =       "usb1v5",
 544                 };
 545                 static struct regulator_consumer_supply usb1v8 = {
 546                         .supply =       "usb1v8",
 547                 };
 548                 static struct regulator_consumer_supply usb3v1 = {
 549                         .supply =       "usb3v1",
 550                 };
 551
 552         /* First add the regulators so that they can be used by transceiver */
 553                 if (twl_has_regulator()) {
 554                         /* this is a template that gets copied */
 555                         struct regulator_init_data usb_fixed = {
 556                                 .constraints.valid_modes_mask =
 557                                         REGULATOR_MODE_NORMAL
 558                                         | REGULATOR_MODE_STANDBY,
 559                                 .constraints.valid_ops_mask =
 560                                         REGULATOR_CHANGE_MODE
 561                                         | REGULATOR_CHANGE_STATUS,
 562                         };
 563
 564                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 565                                                       &usb_fixed, &usb1v5, 1);
 566                         if (IS_ERR(child))
 567                                 return PTR_ERR(child);
 568
 569                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 570                                                       &usb_fixed, &usb1v8, 1);
 571                         if (IS_ERR(child))
 572                                 return PTR_ERR(child);
 573
 574                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 575                                                       &usb_fixed, &usb3v1, 1);
 576                         if (IS_ERR(child))
 577                                 return PTR_ERR(child);
 578
 579                 }
 580
 581                 child = add_child(0, "twl4030_usb",
 582                                 pdata->usb, sizeof(*pdata->usb),
 583                                 true,
 584                                 /* irq0 = USB_PRES, irq1 = USB */
 585                                 pdata->irq_base + 8 + 2, pdata->irq_base + 4);
 586
 587                 if (IS_ERR(child))
 588                         return PTR_ERR(child);
 589
 590                 /* we need to connect regulators to this transceiver */
 591                 if (twl_has_regulator() && child) {
 592                         usb1v5.dev = child;
 593                         usb1v8.dev = child;
 594                         usb3v1.dev = child;
 595                 }
 596         }
 597
 598         if (twl_has_watchdog()) {
 599                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 600                 if (IS_ERR(child))
 601                         return PTR_ERR(child);
 602         }
 603
 604         if (twl_has_pwrbutton()) {
 605                 child = add_child(1, "twl4030_pwrbutton",
 606                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 607                 if (IS_ERR(child))
 608                         return PTR_ERR(child);
 609         }
 610
 611         if (twl_has_codec() && pdata->codec) {
 612                 child = add_child(1, "twl4030_codec",
 613                                 pdata->codec, sizeof(*pdata->codec),
 614                                 false, 0, 0);
 615                 if (IS_ERR(child))
 616                         return PTR_ERR(child);
 617         }
 618
 619         if (twl_has_regulator()) {
 620                 /*
 621                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 622                 if (IS_ERR(child))
 623                         return PTR_ERR(child);
 624                 */
 625
 626                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 627                 if (IS_ERR(child))
 628                         return PTR_ERR(child);
 629
 630                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 631                 if (IS_ERR(child))
 632                         return PTR_ERR(child);
 633
 634                 child = add_regulator((features & TWL4030_VAUX2)
 635                                         ? TWL4030_REG_VAUX2_4030
 636                                         : TWL4030_REG_VAUX2,
 637                                 pdata->vaux2);
 638                 if (IS_ERR(child))
 639                         return PTR_ERR(child);
 640         }
 641
 642         /* maybe add LDOs that are omitted on cost-reduced parts */
 643         if (twl_has_regulator() && !(features & TPS_SUBSET)) {
 644                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 645                 if (IS_ERR(child))
 646                         return PTR_ERR(child);
 647
 648                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 649                 if (IS_ERR(child))
 650                         return PTR_ERR(child);
 651
 652                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 653                 if (IS_ERR(child))
 654                         return PTR_ERR(child);
 655
 656                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 657                 if (IS_ERR(child))
 658                         return PTR_ERR(child);
 659
 660                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 661                 if (IS_ERR(child))
 662                         return PTR_ERR(child);
 663
 664                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 665                 if (IS_ERR(child))
 666                         return PTR_ERR(child);
 667         }
 668
 669         return 0;
 670 }
 671
 672 /*----------------------------------------------------------------------*/
 673
 674 /*
 675  * These three functions initialize the on-chip clock framework,
 676  * letting it generate the right frequencies for USB, MADC, and
 677  * other purposes.
 678  */
 679 static inline int __init protect_pm_master(void)
 680 {
 681         int e = 0;
 682
 683         e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
 684                         R_PROTECT_KEY);
 685         return e;
 686 }
 687
 688 static inline int __init unprotect_pm_master(void)
 689 {
 690         int e = 0;
 691
 692         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
 693                         R_PROTECT_KEY);
 694         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
 695                         R_PROTECT_KEY);
 696         return e;
 697 }
 698
 699 static void clocks_init(struct device *dev,
 700                         struct twl4030_clock_init_data *clock)
 701 {
 702         int e = 0;
 703         struct clk *osc;
 704         u32 rate;
 705         u8 ctrl = HFCLK_FREQ_26_MHZ;
 706
 707 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 708         if (cpu_is_omap2430())
 709                 osc = clk_get(dev, "osc_ck");
 710         else
 711                 osc = clk_get(dev, "osc_sys_ck");
 712
 713         if (IS_ERR(osc)) {
 714                 printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 715                                 "using bootloader value (unknown osc rate)\n");
 716                 return;
 717         }
 718
 719         rate = clk_get_rate(osc);
 720         clk_put(osc);
 721
 722 #else
 723         /* REVISIT for non-OMAP systems, pass the clock rate from
 724          * board init code, using platform_data.
 725          */
 726         osc = ERR_PTR(-EIO);
 727
 728         printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 729                "using bootloader value (unknown osc rate)\n");
 730
 731         return;
 732 #endif
 733
 734         switch (rate) {
 735         case 19200000:
 736                 ctrl = HFCLK_FREQ_19p2_MHZ;
 737                 break;
 738         case 26000000:
 739                 ctrl = HFCLK_FREQ_26_MHZ;
 740                 break;
 741         case 38400000:
 742                 ctrl = HFCLK_FREQ_38p4_MHZ;
 743                 break;
 744         }
 745
 746         ctrl |= HIGH_PERF_SQ;
 747         if (clock && clock->ck32k_lowpwr_enable)
 748                 ctrl |= CK32K_LOWPWR_EN;
 749
 750         e |= unprotect_pm_master();
 751         /* effect->MADC+USB ck en */
 752         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 753         e |= protect_pm_master();
 754
 755         if (e < 0)
 756                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 757 }
 758
 759 /*----------------------------------------------------------------------*/
 760
 761 int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 762 int twl_exit_irq(void);
 763
 764 static int twl4030_remove(struct i2c_client *client)
 765 {
 766         unsigned i;
 767         int status;
 768
 769         status = twl_exit_irq();
 770         if (status < 0)
 771                 return status;
 772
 773         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 774                 struct twl4030_client   *twl = &twl4030_modules[i];
 775
 776                 if (twl->client && twl->client != client)
 777                         i2c_unregister_device(twl->client);
 778                 twl4030_modules[i].client = NULL;
 779         }
 780         inuse = false;
 781         return 0;
 782 }
 783
 784 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 785 static int __init
 786 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 787 {
 788         int                             status;
 789         unsigned                        i;
 790         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 791
 792         if (!pdata) {
 793                 dev_dbg(&client->dev, "no platform data?\n");
 794                 return -EINVAL;
 795         }
 796
 797         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 798                 dev_dbg(&client->dev, "can't talk I2C?\n");
 799                 return -EIO;
 800         }
 801
 802         if (inuse) {
 803                 dev_dbg(&client->dev, "driver is already in use\n");
 804                 return -EBUSY;
 805         }
 806
 807         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 808                 struct twl4030_client   *twl = &twl4030_modules[i];
 809
 810                 twl->address = client->addr + i;
 811                 if (i == 0)
 812                         twl->client = client;
 813                 else {
 814                         twl->client = i2c_new_dummy(client->adapter,
 815                                         twl->address);
 816                         if (!twl->client) {
 817                                 dev_err(&client->dev,
 818                                         "can't attach client %d\n", i);
 819                                 status = -ENOMEM;
 820                                 goto fail;
 821                         }
 822                 }
 823                 mutex_init(&twl->xfer_lock);
 824         }
 825         inuse = true;
 826
 827         /* setup clock framework */
 828         clocks_init(&client->dev, pdata->clock);
 829
 830         /* load power event scripts */
 831         if (twl_has_power() && pdata->power)
 832                 twl4030_power_init(pdata->power);
 833
 834         /* Maybe init the T2 Interrupt subsystem */
 835         if (client->irq
 836                         && pdata->irq_base
 837                         && pdata->irq_end > pdata->irq_base) {
 838                 status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
 839                 if (status < 0)
 840                         goto fail;
 841         }
 842
 843         status = add_children(pdata, id->driver_data);
 844 fail:
 845         if (status < 0)
 846                 twl4030_remove(client);
 847         return status;
 848 }
 849
 850 static const struct i2c_device_id twl4030_ids[] = {
 851         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
 852         { "twl5030", 0 },               /* T2 updated */
 853         { "tps65950", 0 },              /* catalog version of twl5030 */
 854         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
 855         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
 856         { /* end of list */ },
 857 };
 858 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
 859
 860 /* One Client Driver , 4 Clients */
 861 static struct i2c_driver twl4030_driver = {
 862         .driver.name    = DRIVER_NAME,
 863         .id_table       = twl4030_ids,
 864         .probe          = twl4030_probe,
 865         .remove         = twl4030_remove,
 866 };
 867
 868 static int __init twl4030_init(void)
 869 {
 870         return i2c_add_driver(&twl4030_driver);
 871 }
 872 subsys_initcall(twl4030_init);
 873
 874 static void __exit twl4030_exit(void)
 875 {
 876         i2c_del_driver(&twl4030_driver);
 877 }
 878 module_exit(twl4030_exit);
 879
 880 MODULE_AUTHOR("Texas Instruments, Inc.");
 881 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
 882 MODULE_LICENSE("GPL");