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/regmap.h>
  36 #include <linux/clk.h>
  37 #include <linux/err.h>
  38 #include <linux/device.h>
  39 #include <linux/of.h>
  40 #include <linux/of_irq.h>
  41 #include <linux/of_platform.h>
  42 #include <linux/irq.h>
  43 #include <linux/irqdomain.h>
  44
  45 #include <linux/regulator/machine.h>
  46
  47 #include <linux/i2c.h>
  48 #include <linux/i2c/twl.h>
  49
  50 #include "twl-core.h"
  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 /* Triton Core internal information (BEGIN) */
  68
  69 /* Last - for index max*/
  70 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
  71
  72 #define TWL_NUM_SLAVES          4
  73
  74 #define SUB_CHIP_ID0 0
  75 #define SUB_CHIP_ID1 1
  76 #define SUB_CHIP_ID2 2
  77 #define SUB_CHIP_ID3 3
  78 #define SUB_CHIP_ID_INVAL 0xff
  79
  80 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
  81
  82 /* Base Address defns for twl4030_map[] */
  83
  84 /* subchip/slave 0 - USB ID */
  85 #define TWL4030_BASEADD_USB             0x0000
  86
  87 /* subchip/slave 1 - AUD ID */
  88 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
  89 #define TWL4030_BASEADD_GPIO            0x0098
  90 #define TWL4030_BASEADD_INTBR           0x0085
  91 #define TWL4030_BASEADD_PIH             0x0080
  92 #define TWL4030_BASEADD_TEST            0x004C
  93
  94 /* subchip/slave 2 - AUX ID */
  95 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
  96 #define TWL4030_BASEADD_LED             0x00EE
  97 #define TWL4030_BASEADD_MADC            0x0000
  98 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
  99 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 100 #define TWL4030_BASEADD_PWM0            0x00F8
 101 #define TWL4030_BASEADD_PWM1            0x00FB
 102 #define TWL4030_BASEADD_PWMA            0x00EF
 103 #define TWL4030_BASEADD_PWMB            0x00F1
 104 #define TWL4030_BASEADD_KEYPAD          0x00D2
 105
 106 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 107 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 108                                                   one */
 109
 110 /* subchip/slave 3 - POWER ID */
 111 #define TWL4030_BASEADD_BACKUP          0x0014
 112 #define TWL4030_BASEADD_INT             0x002E
 113 #define TWL4030_BASEADD_PM_MASTER       0x0036
 114 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 115 #define TWL4030_BASEADD_RTC             0x001C
 116 #define TWL4030_BASEADD_SECURED_REG     0x0000
 117
 118 /* Triton Core internal information (END) */
 119
 120
 121 /* subchip/slave 0 0x48 - POWER */
 122 #define TWL6030_BASEADD_RTC             0x0000
 123 #define TWL6030_BASEADD_MEM             0x0017
 124 #define TWL6030_BASEADD_PM_MASTER       0x001F
 125 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 126 #define TWL6030_BASEADD_PM_MISC         0x00E2
 127 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 128
 129 /* subchip/slave 1 0x49 - FEATURE */
 130 #define TWL6030_BASEADD_USB             0x0000
 131 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 132 #define TWL6030_BASEADD_AUX             0x0090
 133 #define TWL6030_BASEADD_PWM             0x00BA
 134 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 135 #define TWL6030_BASEADD_PIH             0x00D0
 136 #define TWL6030_BASEADD_CHARGER         0x00E0
 137 #define TWL6025_BASEADD_CHARGER         0x00DA
 138
 139 /* subchip/slave 2 0x4A - DFT */
 140 #define TWL6030_BASEADD_DIEID           0x00C0
 141
 142 /* subchip/slave 3 0x4B - AUDIO */
 143 #define TWL6030_BASEADD_AUDIO           0x0000
 144 #define TWL6030_BASEADD_RSV             0x0000
 145 #define TWL6030_BASEADD_ZERO            0x0000
 146
 147 /* Few power values */
 148 #define R_CFG_BOOT                      0x05
 149
 150 /* some fields in R_CFG_BOOT */
 151 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 152 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 153 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 154 #define HIGH_PERF_SQ                    (1 << 3)
 155 #define CK32K_LOWPWR_EN                 (1 << 7)
 156
 157 /*----------------------------------------------------------------------*/
 158
 159 /* is driver active, bound to a chip? */
 160 static bool inuse;
 161
 162 /* TWL IDCODE Register value */
 163 static u32 twl_idcode;
 164
 165 static unsigned int twl_id;
 166 unsigned int twl_rev(void)
 167 {
 168         return twl_id;
 169 }
 170 EXPORT_SYMBOL(twl_rev);
 171
 172 /* Structure for each TWL4030/TWL6030 Slave */
 173 struct twl_client {
 174         struct i2c_client *client;
 175         struct regmap *regmap;
 176 };
 177
 178 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 179
 180 /* mapping the module id to slave id and base address */
 181 struct twl_mapping {
 182         unsigned char sid;      /* Slave ID */
 183         unsigned char base;     /* base address */
 184 };
 185 static struct twl_mapping *twl_map;
 186
 187 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 188         /*
 189          * NOTE:  don't change this table without updating the
 190          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 191          * so they continue to match the order in this table.
 192          */
 193
 194         { 0, TWL4030_BASEADD_USB },
 195
 196         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 197         { 1, TWL4030_BASEADD_GPIO },
 198         { 1, TWL4030_BASEADD_INTBR },
 199         { 1, TWL4030_BASEADD_PIH },
 200         { 1, TWL4030_BASEADD_TEST },
 201
 202         { 2, TWL4030_BASEADD_KEYPAD },
 203         { 2, TWL4030_BASEADD_MADC },
 204         { 2, TWL4030_BASEADD_INTERRUPTS },
 205         { 2, TWL4030_BASEADD_LED },
 206         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 207         { 2, TWL4030_BASEADD_PRECHARGE },
 208         { 2, TWL4030_BASEADD_PWM0 },
 209         { 2, TWL4030_BASEADD_PWM1 },
 210         { 2, TWL4030_BASEADD_PWMA },
 211         { 2, TWL4030_BASEADD_PWMB },
 212         { 2, TWL5031_BASEADD_ACCESSORY },
 213         { 2, TWL5031_BASEADD_INTERRUPTS },
 214
 215         { 3, TWL4030_BASEADD_BACKUP },
 216         { 3, TWL4030_BASEADD_INT },
 217         { 3, TWL4030_BASEADD_PM_MASTER },
 218         { 3, TWL4030_BASEADD_PM_RECEIVER },
 219         { 3, TWL4030_BASEADD_RTC },
 220         { 3, TWL4030_BASEADD_SECURED_REG },
 221 };
 222
 223 static struct regmap_config twl4030_regmap_config[4] = {
 224         {
 225                 /* Address 0x48 */
 226                 .reg_bits = 8,
 227                 .val_bits = 8,
 228                 .max_register = 0xff,
 229         },
 230         {
 231                 /* Address 0x49 */
 232                 .reg_bits = 8,
 233                 .val_bits = 8,
 234                 .max_register = 0xff,
 235         },
 236         {
 237                 /* Address 0x4a */
 238                 .reg_bits = 8,
 239                 .val_bits = 8,
 240                 .max_register = 0xff,
 241         },
 242         {
 243                 /* Address 0x4b */
 244                 .reg_bits = 8,
 245                 .val_bits = 8,
 246                 .max_register = 0xff,
 247         },
 248 };
 249
 250 static struct twl_mapping twl6030_map[] = {
 251         /*
 252          * NOTE:  don't change this table without updating the
 253          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 254          * so they continue to match the order in this table.
 255          */
 256         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 257         { SUB_CHIP_ID_INVAL, TWL6030_BASEADD_AUDIO },
 258         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 259         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 260         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 261
 262         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 263         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 264         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 265         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 266         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 267
 268         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 269         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 270         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 271         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 272         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 273
 274         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 275         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 276         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 277         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 278         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 279         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 280         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 281
 282         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 283         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 284         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 285 };
 286
 287 static struct regmap_config twl6030_regmap_config[3] = {
 288         {
 289                 /* Address 0x48 */
 290                 .reg_bits = 8,
 291                 .val_bits = 8,
 292                 .max_register = 0xff,
 293         },
 294         {
 295                 /* Address 0x49 */
 296                 .reg_bits = 8,
 297                 .val_bits = 8,
 298                 .max_register = 0xff,
 299         },
 300         {
 301                 /* Address 0x4a */
 302                 .reg_bits = 8,
 303                 .val_bits = 8,
 304                 .max_register = 0xff,
 305         },
 306 };
 307
 308 /*----------------------------------------------------------------------*/
 309
 310 /* Exported Functions */
 311
 312 /**
 313  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 314  * @mod_no: module number
 315  * @value: an array of num_bytes+1 containing data to write
 316  * @reg: register address (just offset will do)
 317  * @num_bytes: number of bytes to transfer
 318  *
 319  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 320  * valid data starts at Offset 1.
 321  *
 322  * Returns the result of operation - 0 is success
 323  */
 324 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 325 {
 326         int ret;
 327         int sid;
 328         struct twl_client *twl;
 329
 330         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 331                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 332                 return -EPERM;
 333         }
 334         if (unlikely(!inuse)) {
 335                 pr_err("%s: not initialized\n", DRIVER_NAME);
 336                 return -EPERM;
 337         }
 338         sid = twl_map[mod_no].sid;
 339         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 340                 pr_err("%s: module %d is not part of the pmic\n",
 341                        DRIVER_NAME, mod_no);
 342                 return -EINVAL;
 343         }
 344         twl = &twl_modules[sid];
 345
 346         ret = regmap_bulk_write(twl->regmap, twl_map[mod_no].base + reg,
 347                                 value, num_bytes);
 348
 349         if (ret)
 350                 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
 351                        DRIVER_NAME, mod_no, reg, num_bytes);
 352
 353         return ret;
 354 }
 355 EXPORT_SYMBOL(twl_i2c_write);
 356
 357 /**
 358  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 359  * @mod_no: module number
 360  * @value: an array of num_bytes containing data to be read
 361  * @reg: register address (just offset will do)
 362  * @num_bytes: number of bytes to transfer
 363  *
 364  * Returns result of operation - num_bytes is success else failure.
 365  */
 366 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 367 {
 368         int ret;
 369         int sid;
 370         struct twl_client *twl;
 371
 372         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 373                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 374                 return -EPERM;
 375         }
 376         if (unlikely(!inuse)) {
 377                 pr_err("%s: not initialized\n", DRIVER_NAME);
 378                 return -EPERM;
 379         }
 380         sid = twl_map[mod_no].sid;
 381         if (unlikely(sid == SUB_CHIP_ID_INVAL)) {
 382                 pr_err("%s: module %d is not part of the pmic\n",
 383                        DRIVER_NAME, mod_no);
 384                 return -EINVAL;
 385         }
 386         twl = &twl_modules[sid];
 387
 388         ret = regmap_bulk_read(twl->regmap, twl_map[mod_no].base + reg,
 389                                value, num_bytes);
 390
 391         if (ret)
 392                 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
 393                        DRIVER_NAME, mod_no, reg, num_bytes);
 394
 395         return ret;
 396 }
 397 EXPORT_SYMBOL(twl_i2c_read);
 398
 399 /**
 400  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 401  * @mod_no: module number
 402  * @value: the value to be written 8 bit
 403  * @reg: register address (just offset will do)
 404  *
 405  * Returns result of operation - 0 is success
 406  */
 407 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 408 {
 409         return twl_i2c_write(mod_no, &value, reg, 1);
 410 }
 411 EXPORT_SYMBOL(twl_i2c_write_u8);
 412
 413 /**
 414  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 415  * @mod_no: module number
 416  * @value: the value read 8 bit
 417  * @reg: register address (just offset will do)
 418  *
 419  * Returns result of operation - 0 is success
 420  */
 421 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 422 {
 423         return twl_i2c_read(mod_no, value, reg, 1);
 424 }
 425 EXPORT_SYMBOL(twl_i2c_read_u8);
 426
 427 /*----------------------------------------------------------------------*/
 428
 429 /**
 430  * twl_read_idcode_register - API to read the IDCODE register.
 431  *
 432  * Unlocks the IDCODE register and read the 32 bit value.
 433  */
 434 static int twl_read_idcode_register(void)
 435 {
 436         int err;
 437
 438         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 439                                                 REG_UNLOCK_TEST_REG);
 440         if (err) {
 441                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 442                 goto fail;
 443         }
 444
 445         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 446                                                 REG_IDCODE_7_0, 4);
 447         if (err) {
 448                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 449                 goto fail;
 450         }
 451
 452         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 453         if (err)
 454                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 455 fail:
 456         return err;
 457 }
 458
 459 /**
 460  * twl_get_type - API to get TWL Si type.
 461  *
 462  * Api to get the TWL Si type from IDCODE value.
 463  */
 464 int twl_get_type(void)
 465 {
 466         return TWL_SIL_TYPE(twl_idcode);
 467 }
 468 EXPORT_SYMBOL_GPL(twl_get_type);
 469
 470 /**
 471  * twl_get_version - API to get TWL Si version.
 472  *
 473  * Api to get the TWL Si version from IDCODE value.
 474  */
 475 int twl_get_version(void)
 476 {
 477         return TWL_SIL_REV(twl_idcode);
 478 }
 479 EXPORT_SYMBOL_GPL(twl_get_version);
 480
 481 /**
 482  * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
 483  *
 484  * Api to get the TWL HFCLK rate based on BOOT_CFG register.
 485  */
 486 int twl_get_hfclk_rate(void)
 487 {
 488         u8 ctrl;
 489         int rate;
 490
 491         twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &ctrl, R_CFG_BOOT);
 492
 493         switch (ctrl & 0x3) {
 494         case HFCLK_FREQ_19p2_MHZ:
 495                 rate = 19200000;
 496                 break;
 497         case HFCLK_FREQ_26_MHZ:
 498                 rate = 26000000;
 499                 break;
 500         case HFCLK_FREQ_38p4_MHZ:
 501                 rate = 38400000;
 502                 break;
 503         default:
 504                 pr_err("TWL4030: HFCLK is not configured\n");
 505                 rate = -EINVAL;
 506                 break;
 507         }
 508
 509         return rate;
 510 }
 511 EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
 512
 513 static struct device *
 514 add_numbered_child(unsigned chip, const char *name, int num,
 515                 void *pdata, unsigned pdata_len,
 516                 bool can_wakeup, int irq0, int irq1)
 517 {
 518         struct platform_device  *pdev;
 519         struct twl_client       *twl = &twl_modules[chip];
 520         int                     status;
 521
 522         pdev = platform_device_alloc(name, num);
 523         if (!pdev) {
 524                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 525                 status = -ENOMEM;
 526                 goto err;
 527         }
 528
 529         pdev->dev.parent = &twl->client->dev;
 530
 531         if (pdata) {
 532                 status = platform_device_add_data(pdev, pdata, pdata_len);
 533                 if (status < 0) {
 534                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 535                         goto err;
 536                 }
 537         }
 538
 539         if (irq0) {
 540                 struct resource r[2] = {
 541                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 542                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 543                 };
 544
 545                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 546                 if (status < 0) {
 547                         dev_dbg(&pdev->dev, "can't add irqs\n");
 548                         goto err;
 549                 }
 550         }
 551
 552         status = platform_device_add(pdev);
 553         if (status == 0)
 554                 device_init_wakeup(&pdev->dev, can_wakeup);
 555
 556 err:
 557         if (status < 0) {
 558                 platform_device_put(pdev);
 559                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 560                 return ERR_PTR(status);
 561         }
 562         return &pdev->dev;
 563 }
 564
 565 static inline struct device *add_child(unsigned chip, const char *name,
 566                 void *pdata, unsigned pdata_len,
 567                 bool can_wakeup, int irq0, int irq1)
 568 {
 569         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 570                 can_wakeup, irq0, irq1);
 571 }
 572
 573 static struct device *
 574 add_regulator_linked(int num, struct regulator_init_data *pdata,
 575                 struct regulator_consumer_supply *consumers,
 576                 unsigned num_consumers, unsigned long features)
 577 {
 578         unsigned sub_chip_id;
 579         struct twl_regulator_driver_data drv_data;
 580
 581         /* regulator framework demands init_data ... */
 582         if (!pdata)
 583                 return NULL;
 584
 585         if (consumers) {
 586                 pdata->consumer_supplies = consumers;
 587                 pdata->num_consumer_supplies = num_consumers;
 588         }
 589
 590         if (pdata->driver_data) {
 591                 /* If we have existing drv_data, just add the flags */
 592                 struct twl_regulator_driver_data *tmp;
 593                 tmp = pdata->driver_data;
 594                 tmp->features |= features;
 595         } else {
 596                 /* add new driver data struct, used only during init */
 597                 drv_data.features = features;
 598                 drv_data.set_voltage = NULL;
 599                 drv_data.get_voltage = NULL;
 600                 drv_data.data = NULL;
 601                 pdata->driver_data = &drv_data;
 602         }
 603
 604         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 605         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 606         return add_numbered_child(sub_chip_id, "twl_reg", num,
 607                 pdata, sizeof(*pdata), false, 0, 0);
 608 }
 609
 610 static struct device *
 611 add_regulator(int num, struct regulator_init_data *pdata,
 612                 unsigned long features)
 613 {
 614         return add_regulator_linked(num, pdata, NULL, 0, features);
 615 }
 616
 617 /*
 618  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 619  * for the PIH, and the next are for the PWR_INT SIH, since
 620  * that's how twl_init_irq() sets things up.
 621  */
 622
 623 static int
 624 add_children(struct twl4030_platform_data *pdata, unsigned irq_base,
 625                 unsigned long features)
 626 {
 627         struct device   *child;
 628         unsigned sub_chip_id;
 629
 630         if (IS_ENABLED(CONFIG_GPIO_TWL4030) && pdata->gpio) {
 631                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 632                                 pdata->gpio, sizeof(*pdata->gpio),
 633                                 false, irq_base + GPIO_INTR_OFFSET, 0);
 634                 if (IS_ERR(child))
 635                         return PTR_ERR(child);
 636         }
 637
 638         if (IS_ENABLED(CONFIG_KEYBOARD_TWL4030) && pdata->keypad) {
 639                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 640                                 pdata->keypad, sizeof(*pdata->keypad),
 641                                 true, irq_base + KEYPAD_INTR_OFFSET, 0);
 642                 if (IS_ERR(child))
 643                         return PTR_ERR(child);
 644         }
 645
 646         if (IS_ENABLED(CONFIG_TWL4030_MADC) && pdata->madc &&
 647             twl_class_is_4030()) {
 648                 child = add_child(SUB_CHIP_ID2, "twl4030_madc",
 649                                 pdata->madc, sizeof(*pdata->madc),
 650                                 true, irq_base + MADC_INTR_OFFSET, 0);
 651                 if (IS_ERR(child))
 652                         return PTR_ERR(child);
 653         }
 654
 655         if (IS_ENABLED(CONFIG_RTC_DRV_TWL4030)) {
 656                 /*
 657                  * REVISIT platform_data here currently might expose the
 658                  * "msecure" line ... but for now we just expect board
 659                  * setup to tell the chip "it's always ok to SET_TIME".
 660                  * Eventually, Linux might become more aware of such
 661                  * HW security concerns, and "least privilege".
 662                  */
 663                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 664                 child = add_child(sub_chip_id, "twl_rtc", NULL, 0,
 665                                 true, irq_base + RTC_INTR_OFFSET, 0);
 666                 if (IS_ERR(child))
 667                         return PTR_ERR(child);
 668         }
 669
 670         if (IS_ENABLED(CONFIG_PWM_TWL)) {
 671                 child = add_child(SUB_CHIP_ID1, "twl-pwm", NULL, 0,
 672                                   false, 0, 0);
 673                 if (IS_ERR(child))
 674                         return PTR_ERR(child);
 675         }
 676
 677         if (IS_ENABLED(CONFIG_PWM_TWL_LED)) {
 678                 child = add_child(SUB_CHIP_ID1, "twl-pwmled", NULL, 0,
 679                                   false, 0, 0);
 680                 if (IS_ERR(child))
 681                         return PTR_ERR(child);
 682         }
 683
 684         if (IS_ENABLED(CONFIG_TWL4030_USB) && pdata->usb &&
 685             twl_class_is_4030()) {
 686
 687                 static struct regulator_consumer_supply usb1v5 = {
 688                         .supply =       "usb1v5",
 689                 };
 690                 static struct regulator_consumer_supply usb1v8 = {
 691                         .supply =       "usb1v8",
 692                 };
 693                 static struct regulator_consumer_supply usb3v1[] = {
 694                         { .supply =     "usb3v1" },
 695                         { .supply =     "bci3v1" },
 696                 };
 697
 698         /* First add the regulators so that they can be used by transceiver */
 699                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 700                         /* this is a template that gets copied */
 701                         struct regulator_init_data usb_fixed = {
 702                                 .constraints.valid_modes_mask =
 703                                         REGULATOR_MODE_NORMAL
 704                                         | REGULATOR_MODE_STANDBY,
 705                                 .constraints.valid_ops_mask =
 706                                         REGULATOR_CHANGE_MODE
 707                                         | REGULATOR_CHANGE_STATUS,
 708                         };
 709
 710                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 711                                                       &usb_fixed, &usb1v5, 1,
 712                                                       features);
 713                         if (IS_ERR(child))
 714                                 return PTR_ERR(child);
 715
 716                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 717                                                       &usb_fixed, &usb1v8, 1,
 718                                                       features);
 719                         if (IS_ERR(child))
 720                                 return PTR_ERR(child);
 721
 722                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 723                                                       &usb_fixed, usb3v1, 2,
 724                                                       features);
 725                         if (IS_ERR(child))
 726                                 return PTR_ERR(child);
 727
 728                 }
 729
 730                 child = add_child(SUB_CHIP_ID0, "twl4030_usb",
 731                                 pdata->usb, sizeof(*pdata->usb), true,
 732                                 /* irq0 = USB_PRES, irq1 = USB */
 733                                 irq_base + USB_PRES_INTR_OFFSET,
 734                                 irq_base + USB_INTR_OFFSET);
 735
 736                 if (IS_ERR(child))
 737                         return PTR_ERR(child);
 738
 739                 /* we need to connect regulators to this transceiver */
 740                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child) {
 741                         usb1v5.dev_name = dev_name(child);
 742                         usb1v8.dev_name = dev_name(child);
 743                         usb3v1[0].dev_name = dev_name(child);
 744                 }
 745         }
 746         if (IS_ENABLED(CONFIG_TWL6030_USB) && pdata->usb &&
 747             twl_class_is_6030()) {
 748
 749                 static struct regulator_consumer_supply usb3v3;
 750                 int regulator;
 751
 752                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030)) {
 753                         /* this is a template that gets copied */
 754                         struct regulator_init_data usb_fixed = {
 755                                 .constraints.valid_modes_mask =
 756                                         REGULATOR_MODE_NORMAL
 757                                         | REGULATOR_MODE_STANDBY,
 758                                 .constraints.valid_ops_mask =
 759                                         REGULATOR_CHANGE_MODE
 760                                         | REGULATOR_CHANGE_STATUS,
 761                         };
 762
 763                         if (features & TWL6025_SUBCLASS) {
 764                                 usb3v3.supply = "ldousb";
 765                                 regulator = TWL6025_REG_LDOUSB;
 766                         } else {
 767                                 usb3v3.supply = "vusb";
 768                                 regulator = TWL6030_REG_VUSB;
 769                         }
 770                         child = add_regulator_linked(regulator, &usb_fixed,
 771                                                         &usb3v3, 1,
 772                                                         features);
 773                         if (IS_ERR(child))
 774                                 return PTR_ERR(child);
 775                 }
 776
 777                 pdata->usb->features = features;
 778
 779                 child = add_child(SUB_CHIP_ID0, "twl6030_usb",
 780                         pdata->usb, sizeof(*pdata->usb), true,
 781                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 782                         irq_base + USBOTG_INTR_OFFSET,
 783                         irq_base + USB_PRES_INTR_OFFSET);
 784
 785                 if (IS_ERR(child))
 786                         return PTR_ERR(child);
 787                 /* we need to connect regulators to this transceiver */
 788                 if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && child)
 789                         usb3v3.dev_name = dev_name(child);
 790         } else if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) &&
 791                    twl_class_is_6030()) {
 792                 if (features & TWL6025_SUBCLASS)
 793                         child = add_regulator(TWL6025_REG_LDOUSB,
 794                                                 pdata->ldousb, features);
 795                 else
 796                         child = add_regulator(TWL6030_REG_VUSB,
 797                                                 pdata->vusb, features);
 798
 799                         if (IS_ERR(child))
 800                                         return PTR_ERR(child);
 801         }
 802
 803         if (IS_ENABLED(CONFIG_TWL4030_WATCHDOG) && twl_class_is_4030()) {
 804                 child = add_child(SUB_CHIP_ID3, "twl4030_wdt", NULL, 0,
 805                                   false, 0, 0);
 806                 if (IS_ERR(child))
 807                         return PTR_ERR(child);
 808         }
 809
 810         if (IS_ENABLED(CONFIG_INPUT_TWL4030_PWRBUTTON) && twl_class_is_4030()) {
 811                 child = add_child(SUB_CHIP_ID3, "twl4030_pwrbutton", NULL, 0,
 812                                   true, irq_base + 8 + 0, 0);
 813                 if (IS_ERR(child))
 814                         return PTR_ERR(child);
 815         }
 816
 817         if (IS_ENABLED(CONFIG_MFD_TWL4030_AUDIO) && pdata->audio &&
 818             twl_class_is_4030()) {
 819                 child = add_child(SUB_CHIP_ID1, "twl4030-audio",
 820                                 pdata->audio, sizeof(*pdata->audio),
 821                                 false, 0, 0);
 822                 if (IS_ERR(child))
 823                         return PTR_ERR(child);
 824         }
 825
 826         /* twl4030 regulators */
 827         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_4030()) {
 828                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 829                                         features);
 830                 if (IS_ERR(child))
 831                         return PTR_ERR(child);
 832
 833                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 834                                         features);
 835                 if (IS_ERR(child))
 836                         return PTR_ERR(child);
 837
 838                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 839                                         features);
 840                 if (IS_ERR(child))
 841                         return PTR_ERR(child);
 842
 843                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 844                                         features);
 845                 if (IS_ERR(child))
 846                         return PTR_ERR(child);
 847
 848                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 849                                         features);
 850                 if (IS_ERR(child))
 851                         return PTR_ERR(child);
 852
 853                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 854                                         features);
 855                 if (IS_ERR(child))
 856                         return PTR_ERR(child);
 857
 858                 child = add_regulator((features & TWL4030_VAUX2)
 859                                         ? TWL4030_REG_VAUX2_4030
 860                                         : TWL4030_REG_VAUX2,
 861                                 pdata->vaux2, features);
 862                 if (IS_ERR(child))
 863                         return PTR_ERR(child);
 864
 865                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 866                                         features);
 867                 if (IS_ERR(child))
 868                         return PTR_ERR(child);
 869
 870                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 871                                         features);
 872                 if (IS_ERR(child))
 873                         return PTR_ERR(child);
 874
 875                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 876                                         features);
 877                 if (IS_ERR(child))
 878                         return PTR_ERR(child);
 879         }
 880
 881         /* maybe add LDOs that are omitted on cost-reduced parts */
 882         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && !(features & TPS_SUBSET)
 883           && twl_class_is_4030()) {
 884                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 885                                         features);
 886                 if (IS_ERR(child))
 887                         return PTR_ERR(child);
 888
 889                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 890                                         features);
 891                 if (IS_ERR(child))
 892                         return PTR_ERR(child);
 893
 894                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
 895                                         features);
 896                 if (IS_ERR(child))
 897                         return PTR_ERR(child);
 898
 899                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
 900                                         features);
 901                 if (IS_ERR(child))
 902                         return PTR_ERR(child);
 903
 904                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
 905                                         features);
 906                 if (IS_ERR(child))
 907                         return PTR_ERR(child);
 908
 909                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
 910                                         features);
 911                 if (IS_ERR(child))
 912                         return PTR_ERR(child);
 913         }
 914
 915         /* twl6030 regulators */
 916         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() &&
 917                         !(features & TWL6025_SUBCLASS)) {
 918                 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
 919                                         features);
 920                 if (IS_ERR(child))
 921                         return PTR_ERR(child);
 922
 923                 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
 924                                         features);
 925                 if (IS_ERR(child))
 926                         return PTR_ERR(child);
 927
 928                 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
 929                                         features);
 930                 if (IS_ERR(child))
 931                         return PTR_ERR(child);
 932
 933                 child = add_regulator(TWL6030_REG_V1V8, pdata->v1v8,
 934                                         features);
 935                 if (IS_ERR(child))
 936                         return PTR_ERR(child);
 937
 938                 child = add_regulator(TWL6030_REG_V2V1, pdata->v2v1,
 939                                         features);
 940                 if (IS_ERR(child))
 941                         return PTR_ERR(child);
 942
 943                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
 944                                         features);
 945                 if (IS_ERR(child))
 946                         return PTR_ERR(child);
 947
 948                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
 949                                         features);
 950                 if (IS_ERR(child))
 951                         return PTR_ERR(child);
 952
 953                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
 954                                         features);
 955                 if (IS_ERR(child))
 956                         return PTR_ERR(child);
 957
 958                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
 959                                         features);
 960                 if (IS_ERR(child))
 961                         return PTR_ERR(child);
 962
 963                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
 964                                         features);
 965                 if (IS_ERR(child))
 966                         return PTR_ERR(child);
 967
 968                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
 969                                         features);
 970                 if (IS_ERR(child))
 971                         return PTR_ERR(child);
 972
 973                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
 974                                         features);
 975                 if (IS_ERR(child))
 976                         return PTR_ERR(child);
 977
 978                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
 979                                         features);
 980                 if (IS_ERR(child))
 981                         return PTR_ERR(child);
 982
 983                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
 984                                         features);
 985                 if (IS_ERR(child))
 986                         return PTR_ERR(child);
 987         }
 988
 989         /* 6030 and 6025 share this regulator */
 990         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030()) {
 991                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
 992                                         features);
 993                 if (IS_ERR(child))
 994                         return PTR_ERR(child);
 995         }
 996
 997         /* twl6025 regulators */
 998         if (IS_ENABLED(CONFIG_REGULATOR_TWL4030) && twl_class_is_6030() &&
 999                         (features & TWL6025_SUBCLASS)) {
1000                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1001                                         features);
1002                 if (IS_ERR(child))
1003                         return PTR_ERR(child);
1004
1005                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1006                                         features);
1007                 if (IS_ERR(child))
1008                         return PTR_ERR(child);
1009
1010                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1011                                         features);
1012                 if (IS_ERR(child))
1013                         return PTR_ERR(child);
1014
1015                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1016                                         features);
1017                 if (IS_ERR(child))
1018                         return PTR_ERR(child);
1019
1020                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1021                                         features);
1022                 if (IS_ERR(child))
1023                         return PTR_ERR(child);
1024
1025                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1026                                         features);
1027                 if (IS_ERR(child))
1028                         return PTR_ERR(child);
1029
1030                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1031                                         features);
1032                 if (IS_ERR(child))
1033                         return PTR_ERR(child);
1034
1035                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1036                                         features);
1037                 if (IS_ERR(child))
1038                         return PTR_ERR(child);
1039
1040                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1041                                         features);
1042                 if (IS_ERR(child))
1043                         return PTR_ERR(child);
1044
1045                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1046                                         features);
1047                 if (IS_ERR(child))
1048                         return PTR_ERR(child);
1049
1050                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1051                                         features);
1052                 if (IS_ERR(child))
1053                         return PTR_ERR(child);
1054
1055         }
1056
1057         if (IS_ENABLED(CONFIG_CHARGER_TWL4030) && pdata->bci &&
1058                         !(features & (TPS_SUBSET | TWL5031))) {
1059                 child = add_child(SUB_CHIP_ID3, "twl4030_bci",
1060                                 pdata->bci, sizeof(*pdata->bci), false,
1061                                 /* irq0 = CHG_PRES, irq1 = BCI */
1062                                 irq_base + BCI_PRES_INTR_OFFSET,
1063                                 irq_base + BCI_INTR_OFFSET);
1064                 if (IS_ERR(child))
1065                         return PTR_ERR(child);
1066         }
1067
1068         return 0;
1069 }
1070
1071 /*----------------------------------------------------------------------*/
1072
1073 /*
1074  * These three functions initialize the on-chip clock framework,
1075  * letting it generate the right frequencies for USB, MADC, and
1076  * other purposes.
1077  */
1078 static inline int __init protect_pm_master(void)
1079 {
1080         int e = 0;
1081
1082         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1083                         TWL4030_PM_MASTER_PROTECT_KEY);
1084         return e;
1085 }
1086
1087 static inline int __init unprotect_pm_master(void)
1088 {
1089         int e = 0;
1090
1091         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1092                         TWL4030_PM_MASTER_KEY_CFG1,
1093                         TWL4030_PM_MASTER_PROTECT_KEY);
1094         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1095                         TWL4030_PM_MASTER_KEY_CFG2,
1096                         TWL4030_PM_MASTER_PROTECT_KEY);
1097
1098         return e;
1099 }
1100
1101 static void clocks_init(struct device *dev,
1102                         struct twl4030_clock_init_data *clock)
1103 {
1104         int e = 0;
1105         struct clk *osc;
1106         u32 rate;
1107         u8 ctrl = HFCLK_FREQ_26_MHZ;
1108
1109         osc = clk_get(dev, "fck");
1110         if (IS_ERR(osc)) {
1111                 printk(KERN_WARNING "Skipping twl internal clock init and "
1112                                 "using bootloader value (unknown osc rate)\n");
1113                 return;
1114         }
1115
1116         rate = clk_get_rate(osc);
1117         clk_put(osc);
1118
1119         switch (rate) {
1120         case 19200000:
1121                 ctrl = HFCLK_FREQ_19p2_MHZ;
1122                 break;
1123         case 26000000:
1124                 ctrl = HFCLK_FREQ_26_MHZ;
1125                 break;
1126         case 38400000:
1127                 ctrl = HFCLK_FREQ_38p4_MHZ;
1128                 break;
1129         }
1130
1131         ctrl |= HIGH_PERF_SQ;
1132         if (clock && clock->ck32k_lowpwr_enable)
1133                 ctrl |= CK32K_LOWPWR_EN;
1134
1135         e |= unprotect_pm_master();
1136         /* effect->MADC+USB ck en */
1137         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1138         e |= protect_pm_master();
1139
1140         if (e < 0)
1141                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1142 }
1143
1144 /*----------------------------------------------------------------------*/
1145
1146
1147 static int twl_remove(struct i2c_client *client)
1148 {
1149         unsigned i, num_slaves;
1150         int status;
1151
1152         if (twl_class_is_4030()) {
1153                 status = twl4030_exit_irq();
1154                 num_slaves = TWL_NUM_SLAVES;
1155         } else {
1156                 status = twl6030_exit_irq();
1157                 num_slaves = TWL_NUM_SLAVES - 1;
1158         }
1159
1160         if (status < 0)
1161                 return status;
1162
1163         for (i = 0; i < num_slaves; i++) {
1164                 struct twl_client       *twl = &twl_modules[i];
1165
1166                 if (twl->client && twl->client != client)
1167                         i2c_unregister_device(twl->client);
1168                 twl_modules[i].client = NULL;
1169         }
1170         inuse = false;
1171         return 0;
1172 }
1173
1174 /* NOTE: This driver only handles a single twl4030/tps659x0 chip */
1175 static int __devinit
1176 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1177 {
1178         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1179         struct device_node              *node = client->dev.of_node;
1180         struct platform_device          *pdev;
1181         struct regmap_config            *twl_regmap_config;
1182         int                             irq_base = 0;
1183         int                             status;
1184         unsigned                        i, num_slaves;
1185
1186         pdev = platform_device_alloc(DRIVER_NAME, -1);
1187         if (!pdev) {
1188                 dev_err(&client->dev, "can't alloc pdev\n");
1189                 return -ENOMEM;
1190         }
1191
1192         status = platform_device_add(pdev);
1193         if (status) {
1194                 platform_device_put(pdev);
1195                 return status;
1196         }
1197
1198         if (node && !pdata) {
1199                 /*
1200                  * XXX: Temporary pdata until the information is correctly
1201                  * retrieved by every TWL modules from DT.
1202                  */
1203                 pdata = devm_kzalloc(&client->dev,
1204                                      sizeof(struct twl4030_platform_data),
1205                                      GFP_KERNEL);
1206                 if (!pdata) {
1207                         status = -ENOMEM;
1208                         goto free;
1209                 }
1210         }
1211
1212         if (!pdata) {
1213                 dev_dbg(&client->dev, "no platform data?\n");
1214                 status = -EINVAL;
1215                 goto free;
1216         }
1217
1218         platform_set_drvdata(pdev, pdata);
1219
1220         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1221                 dev_dbg(&client->dev, "can't talk I2C?\n");
1222                 status = -EIO;
1223                 goto free;
1224         }
1225
1226         if (inuse) {
1227                 dev_dbg(&client->dev, "driver is already in use\n");
1228                 status = -EBUSY;
1229                 goto free;
1230         }
1231
1232         if ((id->driver_data) & TWL6030_CLASS) {
1233                 twl_id = TWL6030_CLASS_ID;
1234                 twl_map = &twl6030_map[0];
1235                 twl_regmap_config = twl6030_regmap_config;
1236                 num_slaves = TWL_NUM_SLAVES - 1;
1237         } else {
1238                 twl_id = TWL4030_CLASS_ID;
1239                 twl_map = &twl4030_map[0];
1240                 twl_regmap_config = twl4030_regmap_config;
1241                 num_slaves = TWL_NUM_SLAVES;
1242         }
1243
1244         for (i = 0; i < num_slaves; i++) {
1245                 struct twl_client *twl = &twl_modules[i];
1246
1247                 if (i == 0) {
1248                         twl->client = client;
1249                 } else {
1250                         twl->client = i2c_new_dummy(client->adapter,
1251                                                     client->addr + i);
1252                         if (!twl->client) {
1253                                 dev_err(&client->dev,
1254                                         "can't attach client %d\n", i);
1255                                 status = -ENOMEM;
1256                                 goto fail;
1257                         }
1258                 }
1259
1260                 twl->regmap = devm_regmap_init_i2c(twl->client,
1261                                                    &twl_regmap_config[i]);
1262                 if (IS_ERR(twl->regmap)) {
1263                         status = PTR_ERR(twl->regmap);
1264                         dev_err(&client->dev,
1265                                 "Failed to allocate regmap %d, err: %d\n", i,
1266                                 status);
1267                         goto fail;
1268                 }
1269         }
1270
1271         inuse = true;
1272
1273         /* setup clock framework */
1274         clocks_init(&pdev->dev, pdata->clock);
1275
1276         /* read TWL IDCODE Register */
1277         if (twl_id == TWL4030_CLASS_ID) {
1278                 status = twl_read_idcode_register();
1279                 WARN(status < 0, "Error: reading twl_idcode register value\n");
1280         }
1281
1282         /* load power event scripts */
1283         if (IS_ENABLED(CONFIG_TWL4030_POWER) && pdata->power)
1284                 twl4030_power_init(pdata->power);
1285
1286         /* Maybe init the T2 Interrupt subsystem */
1287         if (client->irq) {
1288                 if (twl_class_is_4030()) {
1289                         twl4030_init_chip_irq(id->name);
1290                         irq_base = twl4030_init_irq(&client->dev, client->irq);
1291                 } else {
1292                         irq_base = twl6030_init_irq(&client->dev, client->irq);
1293                 }
1294
1295                 if (irq_base < 0) {
1296                         status = irq_base;
1297                         goto fail;
1298                 }
1299         }
1300
1301         /*
1302          * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1303          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1304          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1305          */
1306         if (twl_class_is_4030()) {
1307                 u8 temp;
1308
1309                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1310                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1311                         I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1312                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1313         }
1314
1315         status = -ENODEV;
1316         if (node)
1317                 status = of_platform_populate(node, NULL, NULL, &client->dev);
1318         if (status)
1319                 status = add_children(pdata, irq_base, id->driver_data);
1320
1321 fail:
1322         if (status < 0)
1323                 twl_remove(client);
1324 free:
1325         if (status < 0)
1326                 platform_device_unregister(pdev);
1327
1328         return status;
1329 }
1330
1331 static const struct i2c_device_id twl_ids[] = {
1332         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1333         { "twl5030", 0 },               /* T2 updated */
1334         { "twl5031", TWL5031 },         /* TWL5030 updated */
1335         { "tps65950", 0 },              /* catalog version of twl5030 */
1336         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1337         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1338         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1339                                            and vibrator. Charger in USB module*/
1340         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1341         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1342         { /* end of list */ },
1343 };
1344 MODULE_DEVICE_TABLE(i2c, twl_ids);
1345
1346 /* One Client Driver , 4 Clients */
1347 static struct i2c_driver twl_driver = {
1348         .driver.name    = DRIVER_NAME,
1349         .id_table       = twl_ids,
1350         .probe          = twl_probe,
1351         .remove         = twl_remove,
1352 };
1353
1354 static int __init twl_init(void)
1355 {
1356         return i2c_add_driver(&twl_driver);
1357 }
1358 subsys_initcall(twl_init);
1359
1360 static void __exit twl_exit(void)
1361 {
1362         i2c_del_driver(&twl_driver);
1363 }
1364 module_exit(twl_exit);
1365
1366 MODULE_AUTHOR("Texas Instruments, Inc.");
1367 MODULE_DESCRIPTION("I2C Core interface for TWL");
1368 MODULE_LICENSE("GPL");