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
  42 /*
  43  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  44  * Management and System Companion Device" chips originally designed for
  45  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  46  * often at around 3 Mbit/sec, including for interrupt handling.
  47  *
  48  * This driver core provides genirq support for the interrupts emitted,
  49  * by the various modules, and exports register access primitives.
  50  *
  51  * FIXME this driver currently requires use of the first interrupt line
  52  * (and associated registers).
  53  */
  54
  55 #define DRIVER_NAME                     "twl4030"
  56
  57 #if defined(CONFIG_TWL4030_BCI_BATTERY) || \
  58         defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
  59 #define twl_has_bci()           true
  60 #else
  61 #define twl_has_bci()           false
  62 #endif
  63
  64 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  65 #define twl_has_keypad()        true
  66 #else
  67 #define twl_has_keypad()        false
  68 #endif
  69
  70 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  71 #define twl_has_gpio()  true
  72 #else
  73 #define twl_has_gpio()  false
  74 #endif
  75
  76 #if defined(CONFIG_REGULATOR_TWL4030) \
  77         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  78 #define twl_has_regulator()     true
  79 #else
  80 #define twl_has_regulator()     false
  81 #endif
  82
  83 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  84 #define twl_has_madc()  true
  85 #else
  86 #define twl_has_madc()  false
  87 #endif
  88
  89 #ifdef CONFIG_TWL4030_POWER
  90 #define twl_has_power()        true
  91 #else
  92 #define twl_has_power()        false
  93 #endif
  94
  95 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  96 #define twl_has_rtc()   true
  97 #else
  98 #define twl_has_rtc()   false
  99 #endif
 100
 101 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
 102 #define twl_has_usb()   true
 103 #else
 104 #define twl_has_usb()   false
 105 #endif
 106
 107
 108 /* Triton Core internal information (BEGIN) */
 109
 110 /* Last - for index max*/
 111 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 112
 113 #define TWL4030_NUM_SLAVES              4
 114
 115
 116 /* Base Address defns for twl4030_map[] */
 117
 118 /* subchip/slave 0 - USB ID */
 119 #define TWL4030_BASEADD_USB             0x0000
 120
 121 /* subchip/slave 1 - AUD ID */
 122 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 123 #define TWL4030_BASEADD_GPIO            0x0098
 124 #define TWL4030_BASEADD_INTBR           0x0085
 125 #define TWL4030_BASEADD_PIH             0x0080
 126 #define TWL4030_BASEADD_TEST            0x004C
 127
 128 /* subchip/slave 2 - AUX ID */
 129 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 130 #define TWL4030_BASEADD_LED             0x00EE
 131 #define TWL4030_BASEADD_MADC            0x0000
 132 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 133 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 134 #define TWL4030_BASEADD_PWM0            0x00F8
 135 #define TWL4030_BASEADD_PWM1            0x00FB
 136 #define TWL4030_BASEADD_PWMA            0x00EF
 137 #define TWL4030_BASEADD_PWMB            0x00F1
 138 #define TWL4030_BASEADD_KEYPAD          0x00D2
 139
 140 /* subchip/slave 3 - POWER ID */
 141 #define TWL4030_BASEADD_BACKUP          0x0014
 142 #define TWL4030_BASEADD_INT             0x002E
 143 #define TWL4030_BASEADD_PM_MASTER       0x0036
 144 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 145 #define TWL4030_BASEADD_RTC             0x001C
 146 #define TWL4030_BASEADD_SECURED_REG     0x0000
 147
 148 /* Triton Core internal information (END) */
 149
 150
 151 /* Few power values */
 152 #define R_CFG_BOOT                      0x05
 153 #define R_PROTECT_KEY                   0x0E
 154
 155 /* access control values for R_PROTECT_KEY */
 156 #define KEY_UNLOCK1                     0xce
 157 #define KEY_UNLOCK2                     0xec
 158 #define KEY_LOCK                        0x00
 159
 160 /* some fields in R_CFG_BOOT */
 161 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 162 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 163 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 164 #define HIGH_PERF_SQ                    (1 << 3)
 165
 166
 167 /* chip-specific feature flags, for i2c_device_id.driver_data */
 168 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 169 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 170
 171 /*----------------------------------------------------------------------*/
 172
 173 /* is driver active, bound to a chip? */
 174 static bool inuse;
 175
 176 /* Structure for each TWL4030 Slave */
 177 struct twl4030_client {
 178         struct i2c_client *client;
 179         u8 address;
 180
 181         /* max numb of i2c_msg required is for read =2 */
 182         struct i2c_msg xfer_msg[2];
 183
 184         /* To lock access to xfer_msg */
 185         struct mutex xfer_lock;
 186 };
 187
 188 static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES];
 189
 190
 191 /* mapping the module id to slave id and base address */
 192 struct twl4030mapping {
 193         unsigned char sid;      /* Slave ID */
 194         unsigned char base;     /* base address */
 195 };
 196
 197 static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 198         /*
 199          * NOTE:  don't change this table without updating the
 200          * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_*
 201          * so they continue to match the order in this table.
 202          */
 203
 204         { 0, TWL4030_BASEADD_USB },
 205
 206         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 207         { 1, TWL4030_BASEADD_GPIO },
 208         { 1, TWL4030_BASEADD_INTBR },
 209         { 1, TWL4030_BASEADD_PIH },
 210         { 1, TWL4030_BASEADD_TEST },
 211
 212         { 2, TWL4030_BASEADD_KEYPAD },
 213         { 2, TWL4030_BASEADD_MADC },
 214         { 2, TWL4030_BASEADD_INTERRUPTS },
 215         { 2, TWL4030_BASEADD_LED },
 216         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 217         { 2, TWL4030_BASEADD_PRECHARGE },
 218         { 2, TWL4030_BASEADD_PWM0 },
 219         { 2, TWL4030_BASEADD_PWM1 },
 220         { 2, TWL4030_BASEADD_PWMA },
 221         { 2, TWL4030_BASEADD_PWMB },
 222
 223         { 3, TWL4030_BASEADD_BACKUP },
 224         { 3, TWL4030_BASEADD_INT },
 225         { 3, TWL4030_BASEADD_PM_MASTER },
 226         { 3, TWL4030_BASEADD_PM_RECEIVER },
 227         { 3, TWL4030_BASEADD_RTC },
 228         { 3, TWL4030_BASEADD_SECURED_REG },
 229 };
 230
 231 extern void twl4030_power_init(struct twl4030_power_data *triton2_scripts);
 232
 233 /*----------------------------------------------------------------------*/
 234
 235 /* Exported Functions */
 236
 237 /**
 238  * twl4030_i2c_write - Writes a n bit register in TWL4030
 239  * @mod_no: module number
 240  * @value: an array of num_bytes+1 containing data to write
 241  * @reg: register address (just offset will do)
 242  * @num_bytes: number of bytes to transfer
 243  *
 244  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 245  * valid data starts at Offset 1.
 246  *
 247  * Returns the result of operation - 0 is success
 248  */
 249 int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 250 {
 251         int ret;
 252         int sid;
 253         struct twl4030_client *twl;
 254         struct i2c_msg *msg;
 255
 256         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 257                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 258                 return -EPERM;
 259         }
 260         sid = twl4030_map[mod_no].sid;
 261         twl = &twl4030_modules[sid];
 262
 263         if (unlikely(!inuse)) {
 264                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 265                 return -EPERM;
 266         }
 267         mutex_lock(&twl->xfer_lock);
 268         /*
 269          * [MSG1]: fill the register address data
 270          * fill the data Tx buffer
 271          */
 272         msg = &twl->xfer_msg[0];
 273         msg->addr = twl->address;
 274         msg->len = num_bytes + 1;
 275         msg->flags = 0;
 276         msg->buf = value;
 277         /* over write the first byte of buffer with the register address */
 278         *value = twl4030_map[mod_no].base + reg;
 279         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 280         mutex_unlock(&twl->xfer_lock);
 281
 282         /* i2cTransfer returns num messages.translate it pls.. */
 283         if (ret >= 0)
 284                 ret = 0;
 285         return ret;
 286 }
 287 EXPORT_SYMBOL(twl4030_i2c_write);
 288
 289 /**
 290  * twl4030_i2c_read - Reads a n bit register in TWL4030
 291  * @mod_no: module number
 292  * @value: an array of num_bytes containing data to be read
 293  * @reg: register address (just offset will do)
 294  * @num_bytes: number of bytes to transfer
 295  *
 296  * Returns result of operation - num_bytes is success else failure.
 297  */
 298 int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 299 {
 300         int ret;
 301         u8 val;
 302         int sid;
 303         struct twl4030_client *twl;
 304         struct i2c_msg *msg;
 305
 306         if (unlikely(mod_no > TWL4030_MODULE_LAST)) {
 307                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 308                 return -EPERM;
 309         }
 310         sid = twl4030_map[mod_no].sid;
 311         twl = &twl4030_modules[sid];
 312
 313         if (unlikely(!inuse)) {
 314                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 315                 return -EPERM;
 316         }
 317         mutex_lock(&twl->xfer_lock);
 318         /* [MSG1] fill the register address data */
 319         msg = &twl->xfer_msg[0];
 320         msg->addr = twl->address;
 321         msg->len = 1;
 322         msg->flags = 0; /* Read the register value */
 323         val = twl4030_map[mod_no].base + reg;
 324         msg->buf = &val;
 325         /* [MSG2] fill the data rx buffer */
 326         msg = &twl->xfer_msg[1];
 327         msg->addr = twl->address;
 328         msg->flags = I2C_M_RD;  /* Read the register value */
 329         msg->len = num_bytes;   /* only n bytes */
 330         msg->buf = value;
 331         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 332         mutex_unlock(&twl->xfer_lock);
 333
 334         /* i2cTransfer returns num messages.translate it pls.. */
 335         if (ret >= 0)
 336                 ret = 0;
 337         return ret;
 338 }
 339 EXPORT_SYMBOL(twl4030_i2c_read);
 340
 341 /**
 342  * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030
 343  * @mod_no: module number
 344  * @value: the value to be written 8 bit
 345  * @reg: register address (just offset will do)
 346  *
 347  * Returns result of operation - 0 is success
 348  */
 349 int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 350 {
 351
 352         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 353         u8 temp_buffer[2] = { 0 };
 354         /* offset 1 contains the data */
 355         temp_buffer[1] = value;
 356         return twl4030_i2c_write(mod_no, temp_buffer, reg, 1);
 357 }
 358 EXPORT_SYMBOL(twl4030_i2c_write_u8);
 359
 360 /**
 361  * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030
 362  * @mod_no: module number
 363  * @value: the value read 8 bit
 364  * @reg: register address (just offset will do)
 365  *
 366  * Returns result of operation - 0 is success
 367  */
 368 int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 369 {
 370         return twl4030_i2c_read(mod_no, value, reg, 1);
 371 }
 372 EXPORT_SYMBOL(twl4030_i2c_read_u8);
 373
 374 /*----------------------------------------------------------------------*/
 375
 376 static struct device *
 377 add_numbered_child(unsigned chip, const char *name, int num,
 378                 void *pdata, unsigned pdata_len,
 379                 bool can_wakeup, int irq0, int irq1)
 380 {
 381         struct platform_device  *pdev;
 382         struct twl4030_client   *twl = &twl4030_modules[chip];
 383         int                     status;
 384
 385         pdev = platform_device_alloc(name, num);
 386         if (!pdev) {
 387                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 388                 status = -ENOMEM;
 389                 goto err;
 390         }
 391
 392         device_init_wakeup(&pdev->dev, can_wakeup);
 393         pdev->dev.parent = &twl->client->dev;
 394
 395         if (pdata) {
 396                 status = platform_device_add_data(pdev, pdata, pdata_len);
 397                 if (status < 0) {
 398                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 399                         goto err;
 400                 }
 401         }
 402
 403         if (irq0) {
 404                 struct resource r[2] = {
 405                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 406                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 407                 };
 408
 409                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 410                 if (status < 0) {
 411                         dev_dbg(&pdev->dev, "can't add irqs\n");
 412                         goto err;
 413                 }
 414         }
 415
 416         status = platform_device_add(pdev);
 417
 418 err:
 419         if (status < 0) {
 420                 platform_device_put(pdev);
 421                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 422                 return ERR_PTR(status);
 423         }
 424         return &pdev->dev;
 425 }
 426
 427 static inline struct device *add_child(unsigned chip, const char *name,
 428                 void *pdata, unsigned pdata_len,
 429                 bool can_wakeup, int irq0, int irq1)
 430 {
 431         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 432                 can_wakeup, irq0, irq1);
 433 }
 434
 435 static struct device *
 436 add_regulator_linked(int num, struct regulator_init_data *pdata,
 437                 struct regulator_consumer_supply *consumers,
 438                 unsigned num_consumers)
 439 {
 440         /* regulator framework demands init_data ... */
 441         if (!pdata)
 442                 return NULL;
 443
 444         if (consumers && !pdata->consumer_supplies) {
 445                 pdata->consumer_supplies = consumers;
 446                 pdata->num_consumer_supplies = num_consumers;
 447         }
 448
 449         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 450         return add_numbered_child(3, "twl4030_reg", num,
 451                 pdata, sizeof(*pdata), false, 0, 0);
 452 }
 453
 454 static struct device *
 455 add_regulator(int num, struct regulator_init_data *pdata)
 456 {
 457         return add_regulator_linked(num, pdata, NULL, 0);
 458 }
 459
 460 /*
 461  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 462  * for the PIH, and the next are for the PWR_INT SIH, since
 463  * that's how twl_init_irq() sets things up.
 464  */
 465
 466 static int
 467 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 468 {
 469         struct device   *child;
 470         struct device   *usb_transceiver = NULL;
 471
 472         if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) {
 473                 child = add_child(3, "twl4030_bci",
 474                                 pdata->bci, sizeof(*pdata->bci),
 475                                 false,
 476                                 /* irq0 = CHG_PRES, irq1 = BCI */
 477                                 pdata->irq_base + 8 + 1, pdata->irq_base + 2);
 478                 if (IS_ERR(child))
 479                         return PTR_ERR(child);
 480         }
 481
 482         if (twl_has_gpio() && pdata->gpio) {
 483                 child = add_child(1, "twl4030_gpio",
 484                                 pdata->gpio, sizeof(*pdata->gpio),
 485                                 false, pdata->irq_base + 0, 0);
 486                 if (IS_ERR(child))
 487                         return PTR_ERR(child);
 488         }
 489
 490         if (twl_has_keypad() && pdata->keypad) {
 491                 child = add_child(2, "twl4030_keypad",
 492                                 pdata->keypad, sizeof(*pdata->keypad),
 493                                 true, pdata->irq_base + 1, 0);
 494                 if (IS_ERR(child))
 495                         return PTR_ERR(child);
 496         }
 497
 498         if (twl_has_madc() && pdata->madc) {
 499                 child = add_child(2, "twl4030_madc",
 500                                 pdata->madc, sizeof(*pdata->madc),
 501                                 true, pdata->irq_base + 3, 0);
 502                 if (IS_ERR(child))
 503                         return PTR_ERR(child);
 504         }
 505
 506         if (twl_has_rtc()) {
 507                 /*
 508                  * REVISIT platform_data here currently might expose the
 509                  * "msecure" line ... but for now we just expect board
 510                  * setup to tell the chip "it's always ok to SET_TIME".
 511                  * Eventually, Linux might become more aware of such
 512                  * HW security concerns, and "least privilege".
 513                  */
 514                 child = add_child(3, "twl4030_rtc",
 515                                 NULL, 0,
 516                                 true, pdata->irq_base + 8 + 3, 0);
 517                 if (IS_ERR(child))
 518                         return PTR_ERR(child);
 519         }
 520
 521         if (twl_has_usb() && pdata->usb) {
 522                 child = add_child(0, "twl4030_usb",
 523                                 pdata->usb, sizeof(*pdata->usb),
 524                                 true,
 525                                 /* irq0 = USB_PRES, irq1 = USB */
 526                                 pdata->irq_base + 8 + 2, pdata->irq_base + 4);
 527                 if (IS_ERR(child))
 528                         return PTR_ERR(child);
 529
 530                 /* we need to connect regulators to this transceiver */
 531                 usb_transceiver = child;
 532         }
 533
 534         if (twl_has_regulator()) {
 535                 /*
 536                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 537                 if (IS_ERR(child))
 538                         return PTR_ERR(child);
 539                 */
 540
 541                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 542                 if (IS_ERR(child))
 543                         return PTR_ERR(child);
 544
 545                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 546                 if (IS_ERR(child))
 547                         return PTR_ERR(child);
 548
 549                 child = add_regulator((features & TWL4030_VAUX2)
 550                                         ? TWL4030_REG_VAUX2_4030
 551                                         : TWL4030_REG_VAUX2,
 552                                 pdata->vaux2);
 553                 if (IS_ERR(child))
 554                         return PTR_ERR(child);
 555         }
 556
 557         if (twl_has_regulator() && usb_transceiver) {
 558                 static struct regulator_consumer_supply usb1v5 = {
 559                         .supply =       "usb1v5",
 560                 };
 561                 static struct regulator_consumer_supply usb1v8 = {
 562                         .supply =       "usb1v8",
 563                 };
 564                 static struct regulator_consumer_supply usb3v1 = {
 565                         .supply =       "usb3v1",
 566                 };
 567                 static struct regulator_consumer_supply usbcp = {
 568                         .supply =       "usbcp",
 569                 };
 570
 571                 /* this is a template that gets copied */
 572                 struct regulator_init_data usb_fixed = {
 573                         .constraints.valid_modes_mask =
 574                                   REGULATOR_MODE_NORMAL
 575                                 | REGULATOR_MODE_STANDBY,
 576                         .constraints.valid_ops_mask =
 577                                   REGULATOR_CHANGE_MODE
 578                                 | REGULATOR_CHANGE_STATUS,
 579                 };
 580
 581                 usb1v5.dev = usb_transceiver;
 582                 usb1v8.dev = usb_transceiver;
 583                 usb3v1.dev = usb_transceiver;
 584                 usbcp.dev = usb_transceiver;
 585
 586                 child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed,
 587                                 &usb1v5, 1);
 588                 if (IS_ERR(child))
 589                         return PTR_ERR(child);
 590
 591                 child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed,
 592                                 &usb1v8, 1);
 593                 if (IS_ERR(child))
 594                         return PTR_ERR(child);
 595
 596                 child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed,
 597                                 &usb3v1, 1);
 598                 if (IS_ERR(child))
 599                         return PTR_ERR(child);
 600
 601                 child = add_regulator_linked(TWL4030_REG_VUSBCP, &usb_fixed,
 602                                 &usbcp, 1);
 603                 if (IS_ERR(child))
 604                         return PTR_ERR(child);
 605         }
 606
 607         /* maybe add LDOs that are omitted on cost-reduced parts */
 608         if (twl_has_regulator() && !(features & TPS_SUBSET)) {
 609                 /*
 610                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 611                 if (IS_ERR(child))
 612                         return PTR_ERR(child);
 613                 */
 614
 615                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 616                 if (IS_ERR(child))
 617                         return PTR_ERR(child);
 618
 619                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 620                 if (IS_ERR(child))
 621                         return PTR_ERR(child);
 622
 623                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 624                 if (IS_ERR(child))
 625                         return PTR_ERR(child);
 626
 627                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 628                 if (IS_ERR(child))
 629                         return PTR_ERR(child);
 630
 631                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 632                 if (IS_ERR(child))
 633                         return PTR_ERR(child);
 634         }
 635
 636         return 0;
 637 }
 638
 639 /*----------------------------------------------------------------------*/
 640
 641 /*
 642  * These three functions initialize the on-chip clock framework,
 643  * letting it generate the right frequencies for USB, MADC, and
 644  * other purposes.
 645  */
 646 static inline int __init protect_pm_master(void)
 647 {
 648         int e = 0;
 649
 650         e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK,
 651                         R_PROTECT_KEY);
 652         return e;
 653 }
 654
 655 static inline int __init unprotect_pm_master(void)
 656 {
 657         int e = 0;
 658
 659         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1,
 660                         R_PROTECT_KEY);
 661         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2,
 662                         R_PROTECT_KEY);
 663         return e;
 664 }
 665
 666 static void __init clocks_init(void)
 667 {
 668         int e = 0;
 669         struct clk *osc;
 670         u32 rate;
 671         u8 ctrl = HFCLK_FREQ_26_MHZ;
 672
 673 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 674         if (cpu_is_omap2430())
 675                 osc = clk_get(NULL, "osc_ck");
 676         else
 677                 osc = clk_get(NULL, "osc_sys_ck");
 678 #else
 679         /* REVISIT for non-OMAP systems, pass the clock rate from
 680          * board init code, using platform_data.
 681          */
 682         osc = ERR_PTR(-EIO);
 683 #endif
 684         if (IS_ERR(osc)) {
 685                 printk(KERN_WARNING "Skipping twl4030 internal clock init and "
 686                                 "using bootloader value (unknown osc rate)\n");
 687                 return;
 688         }
 689
 690         rate = clk_get_rate(osc);
 691         clk_put(osc);
 692
 693         switch (rate) {
 694         case 19200000:
 695                 ctrl = HFCLK_FREQ_19p2_MHZ;
 696                 break;
 697         case 26000000:
 698                 ctrl = HFCLK_FREQ_26_MHZ;
 699                 break;
 700         case 38400000:
 701                 ctrl = HFCLK_FREQ_38p4_MHZ;
 702                 break;
 703         }
 704
 705         ctrl |= HIGH_PERF_SQ;
 706         e |= unprotect_pm_master();
 707         /* effect->MADC+USB ck en */
 708         e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 709         e |= protect_pm_master();
 710
 711         if (e < 0)
 712                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 713 }
 714
 715 /*----------------------------------------------------------------------*/
 716
 717 int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 718 int twl_exit_irq(void);
 719
 720 static int twl4030_remove(struct i2c_client *client)
 721 {
 722         unsigned i;
 723         int status;
 724
 725         status = twl_exit_irq();
 726         if (status < 0)
 727                 return status;
 728
 729         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 730                 struct twl4030_client   *twl = &twl4030_modules[i];
 731
 732                 if (twl->client && twl->client != client)
 733                         i2c_unregister_device(twl->client);
 734                 twl4030_modules[i].client = NULL;
 735         }
 736         inuse = false;
 737         return 0;
 738 }
 739
 740 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 741 static int
 742 twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
 743 {
 744         int                             status;
 745         unsigned                        i;
 746         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 747
 748         if (!pdata) {
 749                 dev_dbg(&client->dev, "no platform data?\n");
 750                 return -EINVAL;
 751         }
 752
 753         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 754                 dev_dbg(&client->dev, "can't talk I2C?\n");
 755                 return -EIO;
 756         }
 757
 758         if (inuse) {
 759                 dev_dbg(&client->dev, "driver is already in use\n");
 760                 return -EBUSY;
 761         }
 762
 763         for (i = 0; i < TWL4030_NUM_SLAVES; i++) {
 764                 struct twl4030_client   *twl = &twl4030_modules[i];
 765
 766                 twl->address = client->addr + i;
 767                 if (i == 0)
 768                         twl->client = client;
 769                 else {
 770                         twl->client = i2c_new_dummy(client->adapter,
 771                                         twl->address);
 772                         if (!twl->client) {
 773                                 dev_err(&twl->client->dev,
 774                                         "can't attach client %d\n", i);
 775                                 status = -ENOMEM;
 776                                 goto fail;
 777                         }
 778                         strlcpy(twl->client->name, id->name,
 779                                         sizeof(twl->client->name));
 780                 }
 781                 mutex_init(&twl->xfer_lock);
 782         }
 783         inuse = true;
 784
 785         /* setup clock framework */
 786         clocks_init();
 787
 788         /* load power event scripts */
 789         if (twl_has_power() && pdata->power)
 790                 twl4030_power_init(pdata->power);
 791
 792         /* Maybe init the T2 Interrupt subsystem */
 793         if (client->irq
 794                         && pdata->irq_base
 795                         && pdata->irq_end > pdata->irq_base) {
 796                 status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end);
 797                 if (status < 0)
 798                         goto fail;
 799         }
 800
 801         status = add_children(pdata, id->driver_data);
 802 fail:
 803         if (status < 0)
 804                 twl4030_remove(client);
 805         return status;
 806 }
 807
 808 static const struct i2c_device_id twl4030_ids[] = {
 809         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
 810         { "twl5030", 0 },               /* T2 updated */
 811         { "tps65950", 0 },              /* catalog version of twl5030 */
 812         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
 813         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
 814         { /* end of list */ },
 815 };
 816 MODULE_DEVICE_TABLE(i2c, twl4030_ids);
 817
 818 /* One Client Driver , 4 Clients */
 819 static struct i2c_driver twl4030_driver = {
 820         .driver.name    = DRIVER_NAME,
 821         .id_table       = twl4030_ids,
 822         .probe          = twl4030_probe,
 823         .remove         = twl4030_remove,
 824 };
 825
 826 static int __init twl4030_init(void)
 827 {
 828         return i2c_add_driver(&twl4030_driver);
 829 }
 830 subsys_initcall(twl4030_init);
 831
 832 static void __exit twl4030_exit(void)
 833 {
 834         i2c_del_driver(&twl4030_driver);
 835 }
 836 module_exit(twl4030_exit);
 837
 838 MODULE_AUTHOR("Texas Instruments, Inc.");
 839 MODULE_DESCRIPTION("I2C Core interface for TWL4030");
 840 MODULE_LICENSE("GPL");