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