drivers/mfd/twl-core.c

   1 /*
   2  * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
   3  * and audio CODEC devices
   4  *
   5  * Copyright (C) 2005-2006 Texas Instruments, Inc.
   6  *
   7  * Modifications to defer interrupt handling to a kernel thread:
   8  * Copyright (C) 2006 MontaVista Software, Inc.
   9  *
  10  * Based on tlv320aic23.c:
  11  * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
  12  *
  13  * Code cleanup and modifications to IRQ handler.
  14  * by syed khasim <x0khasim@ti.com>
  15  *
  16  * This program is free software; you can redistribute it and/or modify
  17  * it under the terms of the GNU General Public License as published by
  18  * the Free Software Foundation; either version 2 of the License, or
  19  * (at your option) any later version.
  20  *
  21  * This program is distributed in the hope that it will be useful,
  22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24  * GNU General Public License for more details.
  25  *
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program; if not, write to the Free Software
  28  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  29  */
  30
  31 #include <linux/init.h>
  32 #include <linux/mutex.h>
  33 #include <linux/module.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/clk.h>
  36 #include <linux/err.h>
  37 #include <linux/device.h>
  38 #include <linux/of.h>
  39 #include <linux/of_irq.h>
  40 #include <linux/of_platform.h>
  41 #include <linux/irqdomain.h>
  42
  43 #include <linux/regulator/machine.h>
  44
  45 #include <linux/i2c.h>
  46 #include <linux/i2c/twl.h>
  47
  48 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  49 #include <plat/cpu.h>
  50 #endif
  51
  52 /*
  53  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  54  * Management and System Companion Device" chips originally designed for
  55  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  56  * often at around 3 Mbit/sec, including for interrupt handling.
  57  *
  58  * This driver core provides genirq support for the interrupts emitted,
  59  * by the various modules, and exports register access primitives.
  60  *
  61  * FIXME this driver currently requires use of the first interrupt line
  62  * (and associated registers).
  63  */
  64
  65 #define DRIVER_NAME                     "twl"
  66
  67 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  68 #define twl_has_keypad()        true
  69 #else
  70 #define twl_has_keypad()        false
  71 #endif
  72
  73 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  74 #define twl_has_gpio()  true
  75 #else
  76 #define twl_has_gpio()  false
  77 #endif
  78
  79 #if defined(CONFIG_REGULATOR_TWL4030) \
  80         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  81 #define twl_has_regulator()     true
  82 #else
  83 #define twl_has_regulator()     false
  84 #endif
  85
  86 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  87 #define twl_has_madc()  true
  88 #else
  89 #define twl_has_madc()  false
  90 #endif
  91
  92 #ifdef CONFIG_TWL4030_POWER
  93 #define twl_has_power()        true
  94 #else
  95 #define twl_has_power()        false
  96 #endif
  97
  98 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  99 #define twl_has_rtc()   true
 100 #else
 101 #define twl_has_rtc()   false
 102 #endif
 103
 104 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 105         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 106 #define twl_has_usb()   true
 107 #else
 108 #define twl_has_usb()   false
 109 #endif
 110
 111 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 112         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 113 #define twl_has_watchdog()        true
 114 #else
 115 #define twl_has_watchdog()        false
 116 #endif
 117
 118 #if defined(CONFIG_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_MODULE) ||\
 119         defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
 120 #define twl_has_codec() true
 121 #else
 122 #define twl_has_codec() false
 123 #endif
 124
 125 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 126 #define twl_has_bci()   true
 127 #else
 128 #define twl_has_bci()   false
 129 #endif
 130
 131 /* Triton Core internal information (BEGIN) */
 132
 133 /* Last - for index max*/
 134 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 135
 136 #define TWL_NUM_SLAVES          4
 137
 138 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 139         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 140 #define twl_has_pwrbutton()     true
 141 #else
 142 #define twl_has_pwrbutton()     false
 143 #endif
 144
 145 #define SUB_CHIP_ID0 0
 146 #define SUB_CHIP_ID1 1
 147 #define SUB_CHIP_ID2 2
 148 #define SUB_CHIP_ID3 3
 149
 150 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 151
 152 #define TWL4030_NR_IRQS    8
 153 #define TWL6030_NR_IRQS    20
 154
 155 /* Base Address defns for twl4030_map[] */
 156
 157 /* subchip/slave 0 - USB ID */
 158 #define TWL4030_BASEADD_USB             0x0000
 159
 160 /* subchip/slave 1 - AUD ID */
 161 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 162 #define TWL4030_BASEADD_GPIO            0x0098
 163 #define TWL4030_BASEADD_INTBR           0x0085
 164 #define TWL4030_BASEADD_PIH             0x0080
 165 #define TWL4030_BASEADD_TEST            0x004C
 166
 167 /* subchip/slave 2 - AUX ID */
 168 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 169 #define TWL4030_BASEADD_LED             0x00EE
 170 #define TWL4030_BASEADD_MADC            0x0000
 171 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 172 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 173 #define TWL4030_BASEADD_PWM0            0x00F8
 174 #define TWL4030_BASEADD_PWM1            0x00FB
 175 #define TWL4030_BASEADD_PWMA            0x00EF
 176 #define TWL4030_BASEADD_PWMB            0x00F1
 177 #define TWL4030_BASEADD_KEYPAD          0x00D2
 178
 179 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 180 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 181                                                   one */
 182
 183 /* subchip/slave 3 - POWER ID */
 184 #define TWL4030_BASEADD_BACKUP          0x0014
 185 #define TWL4030_BASEADD_INT             0x002E
 186 #define TWL4030_BASEADD_PM_MASTER       0x0036
 187 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 188 #define TWL4030_BASEADD_RTC             0x001C
 189 #define TWL4030_BASEADD_SECURED_REG     0x0000
 190
 191 /* Triton Core internal information (END) */
 192
 193
 194 /* subchip/slave 0 0x48 - POWER */
 195 #define TWL6030_BASEADD_RTC             0x0000
 196 #define TWL6030_BASEADD_MEM             0x0017
 197 #define TWL6030_BASEADD_PM_MASTER       0x001F
 198 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 199 #define TWL6030_BASEADD_PM_MISC         0x00E2
 200 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 201
 202 /* subchip/slave 1 0x49 - FEATURE */
 203 #define TWL6030_BASEADD_USB             0x0000
 204 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 205 #define TWL6030_BASEADD_AUX             0x0090
 206 #define TWL6030_BASEADD_PWM             0x00BA
 207 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 208 #define TWL6030_BASEADD_PIH             0x00D0
 209 #define TWL6030_BASEADD_CHARGER         0x00E0
 210 #define TWL6025_BASEADD_CHARGER         0x00DA
 211
 212 /* subchip/slave 2 0x4A - DFT */
 213 #define TWL6030_BASEADD_DIEID           0x00C0
 214
 215 /* subchip/slave 3 0x4B - AUDIO */
 216 #define TWL6030_BASEADD_AUDIO           0x0000
 217 #define TWL6030_BASEADD_RSV             0x0000
 218 #define TWL6030_BASEADD_ZERO            0x0000
 219
 220 /* Few power values */
 221 #define R_CFG_BOOT                      0x05
 222
 223 /* some fields in R_CFG_BOOT */
 224 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 225 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 226 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 227 #define HIGH_PERF_SQ                    (1 << 3)
 228 #define CK32K_LOWPWR_EN                 (1 << 7)
 229
 230
 231 /* chip-specific feature flags, for i2c_device_id.driver_data */
 232 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 233 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 234 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 235 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 236
 237 /*----------------------------------------------------------------------*/
 238
 239 /* is driver active, bound to a chip? */
 240 static bool inuse;
 241
 242 /* TWL IDCODE Register value */
 243 static u32 twl_idcode;
 244
 245 static unsigned int twl_id;
 246 unsigned int twl_rev(void)
 247 {
 248         return twl_id;
 249 }
 250 EXPORT_SYMBOL(twl_rev);
 251
 252 /* Structure for each TWL4030/TWL6030 Slave */
 253 struct twl_client {
 254         struct i2c_client *client;
 255         u8 address;
 256
 257         /* max numb of i2c_msg required is for read =2 */
 258         struct i2c_msg xfer_msg[2];
 259
 260         /* To lock access to xfer_msg */
 261         struct mutex xfer_lock;
 262 };
 263
 264 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 265
 266 static struct irq_domain domain;
 267
 268 /* mapping the module id to slave id and base address */
 269 struct twl_mapping {
 270         unsigned char sid;      /* Slave ID */
 271         unsigned char base;     /* base address */
 272 };
 273 static struct twl_mapping *twl_map;
 274
 275 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 276         /*
 277          * NOTE:  don't change this table without updating the
 278          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 279          * so they continue to match the order in this table.
 280          */
 281
 282         { 0, TWL4030_BASEADD_USB },
 283
 284         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 285         { 1, TWL4030_BASEADD_GPIO },
 286         { 1, TWL4030_BASEADD_INTBR },
 287         { 1, TWL4030_BASEADD_PIH },
 288         { 1, TWL4030_BASEADD_TEST },
 289
 290         { 2, TWL4030_BASEADD_KEYPAD },
 291         { 2, TWL4030_BASEADD_MADC },
 292         { 2, TWL4030_BASEADD_INTERRUPTS },
 293         { 2, TWL4030_BASEADD_LED },
 294         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 295         { 2, TWL4030_BASEADD_PRECHARGE },
 296         { 2, TWL4030_BASEADD_PWM0 },
 297         { 2, TWL4030_BASEADD_PWM1 },
 298         { 2, TWL4030_BASEADD_PWMA },
 299         { 2, TWL4030_BASEADD_PWMB },
 300         { 2, TWL5031_BASEADD_ACCESSORY },
 301         { 2, TWL5031_BASEADD_INTERRUPTS },
 302
 303         { 3, TWL4030_BASEADD_BACKUP },
 304         { 3, TWL4030_BASEADD_INT },
 305         { 3, TWL4030_BASEADD_PM_MASTER },
 306         { 3, TWL4030_BASEADD_PM_RECEIVER },
 307         { 3, TWL4030_BASEADD_RTC },
 308         { 3, TWL4030_BASEADD_SECURED_REG },
 309 };
 310
 311 static struct twl_mapping twl6030_map[] = {
 312         /*
 313          * NOTE:  don't change this table without updating the
 314          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 315          * so they continue to match the order in this table.
 316          */
 317         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 318         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 319         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 320         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 321         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 322
 323         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 324         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 325         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 327         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 328
 329         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 330         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 331         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 332         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 333         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 334
 335         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 336         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 337         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 338         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 339         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 340         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 341         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 342
 343         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 344         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 345         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 346 };
 347
 348 /*----------------------------------------------------------------------*/
 349
 350 /* Exported Functions */
 351
 352 /**
 353  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 354  * @mod_no: module number
 355  * @value: an array of num_bytes+1 containing data to write
 356  * @reg: register address (just offset will do)
 357  * @num_bytes: number of bytes to transfer
 358  *
 359  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 360  * valid data starts at Offset 1.
 361  *
 362  * Returns the result of operation - 0 is success
 363  */
 364 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 365 {
 366         int ret;
 367         int sid;
 368         struct twl_client *twl;
 369         struct i2c_msg *msg;
 370
 371         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 372                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 373                 return -EPERM;
 374         }
 375         if (unlikely(!inuse)) {
 376                 pr_err("%s: not initialized\n", DRIVER_NAME);
 377                 return -EPERM;
 378         }
 379         sid = twl_map[mod_no].sid;
 380         twl = &twl_modules[sid];
 381
 382         mutex_lock(&twl->xfer_lock);
 383         /*
 384          * [MSG1]: fill the register address data
 385          * fill the data Tx buffer
 386          */
 387         msg = &twl->xfer_msg[0];
 388         msg->addr = twl->address;
 389         msg->len = num_bytes + 1;
 390         msg->flags = 0;
 391         msg->buf = value;
 392         /* over write the first byte of buffer with the register address */
 393         *value = twl_map[mod_no].base + reg;
 394         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 395         mutex_unlock(&twl->xfer_lock);
 396
 397         /* i2c_transfer returns number of messages transferred */
 398         if (ret != 1) {
 399                 pr_err("%s: i2c_write failed to transfer all messages\n",
 400                         DRIVER_NAME);
 401                 if (ret < 0)
 402                         return ret;
 403                 else
 404                         return -EIO;
 405         } else {
 406                 return 0;
 407         }
 408 }
 409 EXPORT_SYMBOL(twl_i2c_write);
 410
 411 /**
 412  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 413  * @mod_no: module number
 414  * @value: an array of num_bytes containing data to be read
 415  * @reg: register address (just offset will do)
 416  * @num_bytes: number of bytes to transfer
 417  *
 418  * Returns result of operation - num_bytes is success else failure.
 419  */
 420 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 421 {
 422         int ret;
 423         u8 val;
 424         int sid;
 425         struct twl_client *twl;
 426         struct i2c_msg *msg;
 427
 428         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 429                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 430                 return -EPERM;
 431         }
 432         if (unlikely(!inuse)) {
 433                 pr_err("%s: not initialized\n", DRIVER_NAME);
 434                 return -EPERM;
 435         }
 436         sid = twl_map[mod_no].sid;
 437         twl = &twl_modules[sid];
 438
 439         mutex_lock(&twl->xfer_lock);
 440         /* [MSG1] fill the register address data */
 441         msg = &twl->xfer_msg[0];
 442         msg->addr = twl->address;
 443         msg->len = 1;
 444         msg->flags = 0; /* Read the register value */
 445         val = twl_map[mod_no].base + reg;
 446         msg->buf = &val;
 447         /* [MSG2] fill the data rx buffer */
 448         msg = &twl->xfer_msg[1];
 449         msg->addr = twl->address;
 450         msg->flags = I2C_M_RD;  /* Read the register value */
 451         msg->len = num_bytes;   /* only n bytes */
 452         msg->buf = value;
 453         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 454         mutex_unlock(&twl->xfer_lock);
 455
 456         /* i2c_transfer returns number of messages transferred */
 457         if (ret != 2) {
 458                 pr_err("%s: i2c_read failed to transfer all messages\n",
 459                         DRIVER_NAME);
 460                 if (ret < 0)
 461                         return ret;
 462                 else
 463                         return -EIO;
 464         } else {
 465                 return 0;
 466         }
 467 }
 468 EXPORT_SYMBOL(twl_i2c_read);
 469
 470 /**
 471  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 472  * @mod_no: module number
 473  * @value: the value to be written 8 bit
 474  * @reg: register address (just offset will do)
 475  *
 476  * Returns result of operation - 0 is success
 477  */
 478 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 479 {
 480
 481         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 482         u8 temp_buffer[2] = { 0 };
 483         /* offset 1 contains the data */
 484         temp_buffer[1] = value;
 485         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 486 }
 487 EXPORT_SYMBOL(twl_i2c_write_u8);
 488
 489 /**
 490  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 491  * @mod_no: module number
 492  * @value: the value read 8 bit
 493  * @reg: register address (just offset will do)
 494  *
 495  * Returns result of operation - 0 is success
 496  */
 497 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 498 {
 499         return twl_i2c_read(mod_no, value, reg, 1);
 500 }
 501 EXPORT_SYMBOL(twl_i2c_read_u8);
 502
 503 /*----------------------------------------------------------------------*/
 504
 505 /**
 506  * twl_read_idcode_register - API to read the IDCODE register.
 507  *
 508  * Unlocks the IDCODE register and read the 32 bit value.
 509  */
 510 static int twl_read_idcode_register(void)
 511 {
 512         int err;
 513
 514         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 515                                                 REG_UNLOCK_TEST_REG);
 516         if (err) {
 517                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 518                 goto fail;
 519         }
 520
 521         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 522                                                 REG_IDCODE_7_0, 4);
 523         if (err) {
 524                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 525                 goto fail;
 526         }
 527
 528         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 529         if (err)
 530                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 531 fail:
 532         return err;
 533 }
 534
 535 /**
 536  * twl_get_type - API to get TWL Si type.
 537  *
 538  * Api to get the TWL Si type from IDCODE value.
 539  */
 540 int twl_get_type(void)
 541 {
 542         return TWL_SIL_TYPE(twl_idcode);
 543 }
 544 EXPORT_SYMBOL_GPL(twl_get_type);
 545
 546 /**
 547  * twl_get_version - API to get TWL Si version.
 548  *
 549  * Api to get the TWL Si version from IDCODE value.
 550  */
 551 int twl_get_version(void)
 552 {
 553         return TWL_SIL_REV(twl_idcode);
 554 }
 555 EXPORT_SYMBOL_GPL(twl_get_version);
 556
 557 static struct device *
 558 add_numbered_child(unsigned chip, const char *name, int num,
 559                 void *pdata, unsigned pdata_len,
 560                 bool can_wakeup, int irq0, int irq1)
 561 {
 562         struct platform_device  *pdev;
 563         struct twl_client       *twl = &twl_modules[chip];
 564         int                     status;
 565
 566         pdev = platform_device_alloc(name, num);
 567         if (!pdev) {
 568                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 569                 status = -ENOMEM;
 570                 goto err;
 571         }
 572
 573         device_init_wakeup(&pdev->dev, can_wakeup);
 574         pdev->dev.parent = &twl->client->dev;
 575
 576         if (pdata) {
 577                 status = platform_device_add_data(pdev, pdata, pdata_len);
 578                 if (status < 0) {
 579                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 580                         goto err;
 581                 }
 582         }
 583
 584         if (irq0) {
 585                 struct resource r[2] = {
 586                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 587                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 588                 };
 589
 590                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 591                 if (status < 0) {
 592                         dev_dbg(&pdev->dev, "can't add irqs\n");
 593                         goto err;
 594                 }
 595         }
 596
 597         status = platform_device_add(pdev);
 598
 599 err:
 600         if (status < 0) {
 601                 platform_device_put(pdev);
 602                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 603                 return ERR_PTR(status);
 604         }
 605         return &pdev->dev;
 606 }
 607
 608 static inline struct device *add_child(unsigned chip, const char *name,
 609                 void *pdata, unsigned pdata_len,
 610                 bool can_wakeup, int irq0, int irq1)
 611 {
 612         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 613                 can_wakeup, irq0, irq1);
 614 }
 615
 616 static struct device *
 617 add_regulator_linked(int num, struct regulator_init_data *pdata,
 618                 struct regulator_consumer_supply *consumers,
 619                 unsigned num_consumers, unsigned long features)
 620 {
 621         unsigned sub_chip_id;
 622         struct twl_regulator_driver_data drv_data;
 623
 624         /* regulator framework demands init_data ... */
 625         if (!pdata)
 626                 return NULL;
 627
 628         if (consumers) {
 629                 pdata->consumer_supplies = consumers;
 630                 pdata->num_consumer_supplies = num_consumers;
 631         }
 632
 633         if (pdata->driver_data) {
 634                 /* If we have existing drv_data, just add the flags */
 635                 struct twl_regulator_driver_data *tmp;
 636                 tmp = pdata->driver_data;
 637                 tmp->features |= features;
 638         } else {
 639                 /* add new driver data struct, used only during init */
 640                 drv_data.features = features;
 641                 drv_data.set_voltage = NULL;
 642                 drv_data.get_voltage = NULL;
 643                 drv_data.data = NULL;
 644                 pdata->driver_data = &drv_data;
 645         }
 646
 647         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 648         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 649         return add_numbered_child(sub_chip_id, "twl_reg", num,
 650                 pdata, sizeof(*pdata), false, 0, 0);
 651 }
 652
 653 static struct device *
 654 add_regulator(int num, struct regulator_init_data *pdata,
 655                 unsigned long features)
 656 {
 657         return add_regulator_linked(num, pdata, NULL, 0, features);
 658 }
 659
 660 /*
 661  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 662  * for the PIH, and the next are for the PWR_INT SIH, since
 663  * that's how twl_init_irq() sets things up.
 664  */
 665
 666 static int
 667 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 668 {
 669         struct device   *child;
 670         unsigned sub_chip_id;
 671
 672         if (twl_has_gpio() && pdata->gpio) {
 673                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 674                                 pdata->gpio, sizeof(*pdata->gpio),
 675                                 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
 676                 if (IS_ERR(child))
 677                         return PTR_ERR(child);
 678         }
 679
 680         if (twl_has_keypad() && pdata->keypad) {
 681                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 682                                 pdata->keypad, sizeof(*pdata->keypad),
 683                                 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
 684                 if (IS_ERR(child))
 685                         return PTR_ERR(child);
 686         }
 687
 688         if (twl_has_madc() && pdata->madc) {
 689                 child = add_child(2, "twl4030_madc",
 690                                 pdata->madc, sizeof(*pdata->madc),
 691                                 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
 692                 if (IS_ERR(child))
 693                         return PTR_ERR(child);
 694         }
 695
 696         if (twl_has_rtc()) {
 697                 /*
 698                  * REVISIT platform_data here currently might expose the
 699                  * "msecure" line ... but for now we just expect board
 700                  * setup to tell the chip "it's always ok to SET_TIME".
 701                  * Eventually, Linux might become more aware of such
 702                  * HW security concerns, and "least privilege".
 703                  */
 704                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 705                 child = add_child(sub_chip_id, "twl_rtc",
 706                                 NULL, 0,
 707                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
 708                 if (IS_ERR(child))
 709                         return PTR_ERR(child);
 710         }
 711
 712         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 713
 714                 static struct regulator_consumer_supply usb1v5 = {
 715                         .supply =       "usb1v5",
 716                 };
 717                 static struct regulator_consumer_supply usb1v8 = {
 718                         .supply =       "usb1v8",
 719                 };
 720                 static struct regulator_consumer_supply usb3v1 = {
 721                         .supply =       "usb3v1",
 722                 };
 723
 724         /* First add the regulators so that they can be used by transceiver */
 725                 if (twl_has_regulator()) {
 726                         /* this is a template that gets copied */
 727                         struct regulator_init_data usb_fixed = {
 728                                 .constraints.valid_modes_mask =
 729                                         REGULATOR_MODE_NORMAL
 730                                         | REGULATOR_MODE_STANDBY,
 731                                 .constraints.valid_ops_mask =
 732                                         REGULATOR_CHANGE_MODE
 733                                         | REGULATOR_CHANGE_STATUS,
 734                         };
 735
 736                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 737                                                       &usb_fixed, &usb1v5, 1,
 738                                                       features);
 739                         if (IS_ERR(child))
 740                                 return PTR_ERR(child);
 741
 742                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 743                                                       &usb_fixed, &usb1v8, 1,
 744                                                       features);
 745                         if (IS_ERR(child))
 746                                 return PTR_ERR(child);
 747
 748                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 749                                                       &usb_fixed, &usb3v1, 1,
 750                                                       features);
 751                         if (IS_ERR(child))
 752                                 return PTR_ERR(child);
 753
 754                 }
 755
 756                 child = add_child(0, "twl4030_usb",
 757                                 pdata->usb, sizeof(*pdata->usb),
 758                                 true,
 759                                 /* irq0 = USB_PRES, irq1 = USB */
 760                                 pdata->irq_base + USB_PRES_INTR_OFFSET,
 761                                 pdata->irq_base + USB_INTR_OFFSET);
 762
 763                 if (IS_ERR(child))
 764                         return PTR_ERR(child);
 765
 766                 /* we need to connect regulators to this transceiver */
 767                 if (twl_has_regulator() && child) {
 768                         usb1v5.dev = child;
 769                         usb1v8.dev = child;
 770                         usb3v1.dev = child;
 771                 }
 772         }
 773         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 774
 775                 static struct regulator_consumer_supply usb3v3;
 776                 int regulator;
 777
 778                 if (twl_has_regulator()) {
 779                         /* this is a template that gets copied */
 780                         struct regulator_init_data usb_fixed = {
 781                                 .constraints.valid_modes_mask =
 782                                         REGULATOR_MODE_NORMAL
 783                                         | REGULATOR_MODE_STANDBY,
 784                                 .constraints.valid_ops_mask =
 785                                         REGULATOR_CHANGE_MODE
 786                                         | REGULATOR_CHANGE_STATUS,
 787                         };
 788
 789                         if (features & TWL6025_SUBCLASS) {
 790                                 usb3v3.supply = "ldousb";
 791                                 regulator = TWL6025_REG_LDOUSB;
 792                         } else {
 793                                 usb3v3.supply = "vusb";
 794                                 regulator = TWL6030_REG_VUSB;
 795                         }
 796                         child = add_regulator_linked(regulator, &usb_fixed,
 797                                                         &usb3v3, 1,
 798                                                         features);
 799                         if (IS_ERR(child))
 800                                 return PTR_ERR(child);
 801                 }
 802
 803                 pdata->usb->features = features;
 804
 805                 child = add_child(0, "twl6030_usb",
 806                         pdata->usb, sizeof(*pdata->usb),
 807                         true,
 808                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 809                         pdata->irq_base + USBOTG_INTR_OFFSET,
 810                         pdata->irq_base + USB_PRES_INTR_OFFSET);
 811
 812                 if (IS_ERR(child))
 813                         return PTR_ERR(child);
 814                 /* we need to connect regulators to this transceiver */
 815                 if (twl_has_regulator() && child)
 816                         usb3v3.dev = child;
 817         } else if (twl_has_regulator() && twl_class_is_6030()) {
 818                 if (features & TWL6025_SUBCLASS)
 819                         child = add_regulator(TWL6025_REG_LDOUSB,
 820                                                 pdata->ldousb, features);
 821                 else
 822                         child = add_regulator(TWL6030_REG_VUSB,
 823                                                 pdata->vusb, features);
 824
 825                         if (IS_ERR(child))
 826                                         return PTR_ERR(child);
 827         }
 828
 829         if (twl_has_watchdog() && twl_class_is_4030()) {
 830                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 831                 if (IS_ERR(child))
 832                         return PTR_ERR(child);
 833         }
 834
 835         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 836                 child = add_child(1, "twl4030_pwrbutton",
 837                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 838                 if (IS_ERR(child))
 839                         return PTR_ERR(child);
 840         }
 841
 842         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 843                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 844                 child = add_child(sub_chip_id, "twl4030-audio",
 845                                 pdata->audio, sizeof(*pdata->audio),
 846                                 false, 0, 0);
 847                 if (IS_ERR(child))
 848                         return PTR_ERR(child);
 849         }
 850
 851         if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
 852                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 853                 child = add_child(sub_chip_id, "twl6040",
 854                                 pdata->audio, sizeof(*pdata->audio),
 855                                 false, 0, 0);
 856                 if (IS_ERR(child))
 857                         return PTR_ERR(child);
 858         }
 859
 860         /* twl4030 regulators */
 861         if (twl_has_regulator() && twl_class_is_4030()) {
 862                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 863                                         features);
 864                 if (IS_ERR(child))
 865                         return PTR_ERR(child);
 866
 867                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 868                                         features);
 869                 if (IS_ERR(child))
 870                         return PTR_ERR(child);
 871
 872                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 873                                         features);
 874                 if (IS_ERR(child))
 875                         return PTR_ERR(child);
 876
 877                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 878                                         features);
 879                 if (IS_ERR(child))
 880                         return PTR_ERR(child);
 881
 882                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 883                                         features);
 884                 if (IS_ERR(child))
 885                         return PTR_ERR(child);
 886
 887                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 888                                         features);
 889                 if (IS_ERR(child))
 890                         return PTR_ERR(child);
 891
 892                 child = add_regulator((features & TWL4030_VAUX2)
 893                                         ? TWL4030_REG_VAUX2_4030
 894                                         : TWL4030_REG_VAUX2,
 895                                 pdata->vaux2, features);
 896                 if (IS_ERR(child))
 897                         return PTR_ERR(child);
 898
 899                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 900                                         features);
 901                 if (IS_ERR(child))
 902                         return PTR_ERR(child);
 903
 904                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 905                                         features);
 906                 if (IS_ERR(child))
 907                         return PTR_ERR(child);
 908
 909                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 910                                         features);
 911                 if (IS_ERR(child))
 912                         return PTR_ERR(child);
 913         }
 914
 915         /* maybe add LDOs that are omitted on cost-reduced parts */
 916         if (twl_has_regulator() && !(features & TPS_SUBSET)
 917           && twl_class_is_4030()) {
 918                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 919                                         features);
 920                 if (IS_ERR(child))
 921                         return PTR_ERR(child);
 922
 923                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 924                                         features);
 925                 if (IS_ERR(child))
 926                         return PTR_ERR(child);
 927
 928                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 929                                         features);
 930                 if (IS_ERR(child))
 931                         return PTR_ERR(child);
 932
 933                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 934                                         features);
 935                 if (IS_ERR(child))
 936                         return PTR_ERR(child);
 937
 938                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 939                                         features);
 940                 if (IS_ERR(child))
 941                         return PTR_ERR(child);
 942
 943                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 944                                         features);
 945                 if (IS_ERR(child))
 946                         return PTR_ERR(child);
 947         }
 948
 949         /* twl6030 regulators */
 950         if (twl_has_regulator() && twl_class_is_6030() &&
 951                         !(features & TWL6025_SUBCLASS)) {
 952                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 953                                         features);
 954                 if (IS_ERR(child))
 955                         return PTR_ERR(child);
 956
 957                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 958                                         features);
 959                 if (IS_ERR(child))
 960                         return PTR_ERR(child);
 961
 962                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 963                                         features);
 964                 if (IS_ERR(child))
 965                         return PTR_ERR(child);
 966
 967                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 968                                         features);
 969                 if (IS_ERR(child))
 970                         return PTR_ERR(child);
 971
 972                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 973                                         features);
 974                 if (IS_ERR(child))
 975                         return PTR_ERR(child);
 976
 977                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 978                                         features);
 979                 if (IS_ERR(child))
 980                         return PTR_ERR(child);
 981
 982                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
 983                                         features);
 984                 if (IS_ERR(child))
 985                         return PTR_ERR(child);
 986
 987                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
 988                                         features);
 989                 if (IS_ERR(child))
 990                         return PTR_ERR(child);
 991
 992                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
 993                                         features);
 994                 if (IS_ERR(child))
 995                         return PTR_ERR(child);
 996         }
 997
 998         /* 6030 and 6025 share this regulator */
 999         if (twl_has_regulator() && twl_class_is_6030()) {
1000                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
1001                                         features);
1002                 if (IS_ERR(child))
1003                         return PTR_ERR(child);
1004         }
1005
1006         /* twl6025 regulators */
1007         if (twl_has_regulator() && twl_class_is_6030() &&
1008                         (features & TWL6025_SUBCLASS)) {
1009                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1010                                         features);
1011                 if (IS_ERR(child))
1012                         return PTR_ERR(child);
1013
1014                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1015                                         features);
1016                 if (IS_ERR(child))
1017                         return PTR_ERR(child);
1018
1019                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1020                                         features);
1021                 if (IS_ERR(child))
1022                         return PTR_ERR(child);
1023
1024                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1025                                         features);
1026                 if (IS_ERR(child))
1027                         return PTR_ERR(child);
1028
1029                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1030                                         features);
1031                 if (IS_ERR(child))
1032                         return PTR_ERR(child);
1033
1034                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1035                                         features);
1036                 if (IS_ERR(child))
1037                         return PTR_ERR(child);
1038
1039                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1040                                         features);
1041                 if (IS_ERR(child))
1042                         return PTR_ERR(child);
1043
1044                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1045                                         features);
1046                 if (IS_ERR(child))
1047                         return PTR_ERR(child);
1048
1049                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1050                                         features);
1051                 if (IS_ERR(child))
1052                         return PTR_ERR(child);
1053
1054                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1055                                         features);
1056                 if (IS_ERR(child))
1057                         return PTR_ERR(child);
1058
1059                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1060                                         features);
1061                 if (IS_ERR(child))
1062                         return PTR_ERR(child);
1063
1064         }
1065
1066         if (twl_has_bci() && pdata->bci &&
1067                         !(features & (TPS_SUBSET | TWL5031))) {
1068                 child = add_child(3, "twl4030_bci",
1069                                 pdata->bci, sizeof(*pdata->bci), false,
1070                                 /* irq0 = CHG_PRES, irq1 = BCI */
1071                                 pdata->irq_base + BCI_PRES_INTR_OFFSET,
1072                                 pdata->irq_base + BCI_INTR_OFFSET);
1073                 if (IS_ERR(child))
1074                         return PTR_ERR(child);
1075         }
1076
1077         return 0;
1078 }
1079
1080 /*----------------------------------------------------------------------*/
1081
1082 /*
1083  * These three functions initialize the on-chip clock framework,
1084  * letting it generate the right frequencies for USB, MADC, and
1085  * other purposes.
1086  */
1087 static inline int __init protect_pm_master(void)
1088 {
1089         int e = 0;
1090
1091         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1092                         TWL4030_PM_MASTER_PROTECT_KEY);
1093         return e;
1094 }
1095
1096 static inline int __init unprotect_pm_master(void)
1097 {
1098         int e = 0;
1099
1100         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1101                         TWL4030_PM_MASTER_KEY_CFG1,
1102                         TWL4030_PM_MASTER_PROTECT_KEY);
1103         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1104                         TWL4030_PM_MASTER_KEY_CFG2,
1105                         TWL4030_PM_MASTER_PROTECT_KEY);
1106
1107         return e;
1108 }
1109
1110 static void clocks_init(struct device *dev,
1111                         struct twl4030_clock_init_data *clock)
1112 {
1113         int e = 0;
1114         struct clk *osc;
1115         u32 rate;
1116         u8 ctrl = HFCLK_FREQ_26_MHZ;
1117
1118 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1119         if (cpu_is_omap2430())
1120                 osc = clk_get(dev, "osc_ck");
1121         else
1122                 osc = clk_get(dev, "osc_sys_ck");
1123
1124         if (IS_ERR(osc)) {
1125                 printk(KERN_WARNING "Skipping twl internal clock init and "
1126                                 "using bootloader value (unknown osc rate)\n");
1127                 return;
1128         }
1129
1130         rate = clk_get_rate(osc);
1131         clk_put(osc);
1132
1133 #else
1134         /* REVISIT for non-OMAP systems, pass the clock rate from
1135          * board init code, using platform_data.
1136          */
1137         osc = ERR_PTR(-EIO);
1138
1139         printk(KERN_WARNING "Skipping twl internal clock init and "
1140                "using bootloader value (unknown osc rate)\n");
1141
1142         return;
1143 #endif
1144
1145         switch (rate) {
1146         case 19200000:
1147                 ctrl = HFCLK_FREQ_19p2_MHZ;
1148                 break;
1149         case 26000000:
1150                 ctrl = HFCLK_FREQ_26_MHZ;
1151                 break;
1152         case 38400000:
1153                 ctrl = HFCLK_FREQ_38p4_MHZ;
1154                 break;
1155         }
1156
1157         ctrl |= HIGH_PERF_SQ;
1158         if (clock && clock->ck32k_lowpwr_enable)
1159                 ctrl |= CK32K_LOWPWR_EN;
1160
1161         e |= unprotect_pm_master();
1162         /* effect->MADC+USB ck en */
1163         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1164         e |= protect_pm_master();
1165
1166         if (e < 0)
1167                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1168 }
1169
1170 /*----------------------------------------------------------------------*/
1171
1172 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1173 int twl4030_exit_irq(void);
1174 int twl4030_init_chip_irq(const char *chip);
1175 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1176 int twl6030_exit_irq(void);
1177
1178 static int twl_remove(struct i2c_client *client)
1179 {
1180         unsigned i;
1181         int status;
1182
1183         if (twl_class_is_4030())
1184                 status = twl4030_exit_irq();
1185         else
1186                 status = twl6030_exit_irq();
1187
1188         if (status < 0)
1189                 return status;
1190
1191         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1192                 struct twl_client       *twl = &twl_modules[i];
1193
1194                 if (twl->client && twl->client != client)
1195                         i2c_unregister_device(twl->client);
1196                 twl_modules[i].client = NULL;
1197         }
1198         inuse = false;
1199         return 0;
1200 }
1201
1202 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
1203 static int __devinit
1204 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1205 {
1206         int                             status;
1207         unsigned                        i;
1208         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1209         struct device_node              *node = client->dev.of_node;
1210         u8 temp;
1211         int ret = 0;
1212         int nr_irqs = TWL4030_NR_IRQS;
1213
1214         if ((id->driver_data) & TWL6030_CLASS)
1215                 nr_irqs = TWL6030_NR_IRQS;
1216
1217         if (node && !pdata) {
1218                 /*
1219                  * XXX: Temporary pdata until the information is correctly
1220                  * retrieved by every TWL modules from DT.
1221                  */
1222                 pdata = devm_kzalloc(&client->dev,
1223                                      sizeof(struct twl4030_platform_data),
1224                                      GFP_KERNEL);
1225                 if (!pdata)
1226                         return -ENOMEM;
1227         }
1228
1229         if (!pdata) {
1230                 dev_dbg(&client->dev, "no platform data?\n");
1231                 return -EINVAL;
1232         }
1233
1234         status = irq_alloc_descs(-1, pdata->irq_base, nr_irqs, 0);
1235         if (IS_ERR_VALUE(status)) {
1236                 dev_err(&client->dev, "Fail to allocate IRQ descs\n");
1237                 return status;
1238         }
1239
1240         pdata->irq_base = status;
1241         pdata->irq_end = pdata->irq_base + nr_irqs;
1242
1243         domain.irq_base = pdata->irq_base;
1244         domain.nr_irq = nr_irqs;
1245 #ifdef CONFIG_OF_IRQ
1246         domain.of_node = of_node_get(node);
1247         domain.ops = &irq_domain_simple_ops;
1248 #endif
1249         irq_domain_add(&domain);
1250
1251         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1252                 dev_dbg(&client->dev, "can't talk I2C?\n");
1253                 return -EIO;
1254         }
1255
1256         if (inuse) {
1257                 dev_dbg(&client->dev, "driver is already in use\n");
1258                 return -EBUSY;
1259         }
1260
1261         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1262                 struct twl_client       *twl = &twl_modules[i];
1263
1264                 twl->address = client->addr + i;
1265                 if (i == 0)
1266                         twl->client = client;
1267                 else {
1268                         twl->client = i2c_new_dummy(client->adapter,
1269                                         twl->address);
1270                         if (!twl->client) {
1271                                 dev_err(&client->dev,
1272                                         "can't attach client %d\n", i);
1273                                 status = -ENOMEM;
1274                                 goto fail;
1275                         }
1276                 }
1277                 mutex_init(&twl->xfer_lock);
1278         }
1279         inuse = true;
1280         if ((id->driver_data) & TWL6030_CLASS) {
1281                 twl_id = TWL6030_CLASS_ID;
1282                 twl_map = &twl6030_map[0];
1283         } else {
1284                 twl_id = TWL4030_CLASS_ID;
1285                 twl_map = &twl4030_map[0];
1286         }
1287
1288         /* setup clock framework */
1289         clocks_init(&client->dev, pdata->clock);
1290
1291         /* read TWL IDCODE Register */
1292         if (twl_id == TWL4030_CLASS_ID) {
1293                 ret = twl_read_idcode_register();
1294                 WARN(ret < 0, "Error: reading twl_idcode register value\n");
1295         }
1296
1297         /* load power event scripts */
1298         if (twl_has_power() && pdata->power)
1299                 twl4030_power_init(pdata->power);
1300
1301         /* Maybe init the T2 Interrupt subsystem */
1302         if (client->irq
1303                         && pdata->irq_base
1304                         && pdata->irq_end > pdata->irq_base) {
1305                 if (twl_class_is_4030()) {
1306                         twl4030_init_chip_irq(id->name);
1307                         status = twl4030_init_irq(client->irq, pdata->irq_base,
1308                         pdata->irq_end);
1309                 } else {
1310                         status = twl6030_init_irq(client->irq, pdata->irq_base,
1311                         pdata->irq_end);
1312                 }
1313
1314                 if (status < 0)
1315                         goto fail;
1316         }
1317
1318         /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1319          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1320          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1321          */
1322
1323         if (twl_class_is_4030()) {
1324                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1325                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1326                 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1327                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1328         }
1329
1330 #ifdef CONFIG_OF_DEVICE
1331         if (node)
1332                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1333         else
1334 #endif
1335                 status = add_children(pdata, id->driver_data);
1336
1337 fail:
1338         if (status < 0)
1339                 twl_remove(client);
1340         return status;
1341 }
1342
1343 static const struct i2c_device_id twl_ids[] = {
1344         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1345         { "twl5030", 0 },               /* T2 updated */
1346         { "twl5031", TWL5031 },         /* TWL5030 updated */
1347         { "tps65950", 0 },              /* catalog version of twl5030 */
1348         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1349         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1350         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1351                                            and vibrator. Charger in USB module*/
1352         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1353         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1354         { /* end of list */ },
1355 };
1356 MODULE_DEVICE_TABLE(i2c, twl_ids);
1357
1358 /* One Client Driver , 4 Clients */
1359 static struct i2c_driver twl_driver = {
1360         .driver.name    = DRIVER_NAME,
1361         .id_table       = twl_ids,
1362         .probe          = twl_probe,
1363         .remove         = twl_remove,
1364 };
1365
1366 static int __init twl_init(void)
1367 {
1368         return i2c_add_driver(&twl_driver);
1369 }
1370 subsys_initcall(twl_init);
1371
1372 static void __exit twl_exit(void)
1373 {
1374         i2c_del_driver(&twl_driver);
1375 }
1376 module_exit(twl_exit);
1377
1378 MODULE_AUTHOR("Texas Instruments, Inc.");
1379 MODULE_DESCRIPTION("I2C Core interface for TWL");
1380 MODULE_LICENSE("GPL");