linux/drivers/mfd/twl-core.c
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   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? */
 157static bool inuse;
 158
 159/* TWL IDCODE Register value */
 160static u32 twl_idcode;
 161
 162static unsigned int twl_id;
 163unsigned int twl_rev(void)
 164{
 165        return twl_id;
 166}
 167EXPORT_SYMBOL(twl_rev);
 168
 169/* Structure for each TWL4030/TWL6030 Slave */
 170struct twl_client {
 171        struct i2c_client *client;
 172        struct regmap *regmap;
 173};
 174
 175static struct twl_client twl_modules[TWL_NUM_SLAVES];
 176
 177/* mapping the module id to slave id and base address */
 178struct twl_mapping {
 179        unsigned char sid;      /* Slave ID */
 180        unsigned char base;     /* base address */
 181};
 182static struct twl_mapping *twl_map;
 183
 184static 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
 221static 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
 248static 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
 285static 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 */
 322int 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}
 353EXPORT_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 */
 364int 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}
 395EXPORT_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 */
 405int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 406{
 407        return twl_i2c_write(mod_no, &value, reg, 1);
 408}
 409EXPORT_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 */
 419int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 420{
 421        return twl_i2c_read(mod_no, value, reg, 1);
 422}
 423EXPORT_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 */
 432static 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);
 453fail:
 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 */
 462int twl_get_type(void)
 463{
 464        return TWL_SIL_TYPE(twl_idcode);
 465}
 466EXPORT_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 */
 473int twl_get_version(void)
 474{
 475        return TWL_SIL_REV(twl_idcode);
 476}
 477EXPORT_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 */
 484int 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}
 509EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
 510
 511static struct device *
 512add_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
 554err:
 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
 563static 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
 571static struct device *
 572add_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
 608static struct device *
 609add_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
 621static int
 622add_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 */
1076static 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
1085static 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
1097static 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
1143static 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 */
1171static int
1172twl_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
1317fail:
1318        if (status < 0)
1319                twl_remove(client);
1320free:
1321        if (status < 0)
1322                platform_device_unregister(pdev);
1323
1324        return status;
1325}
1326
1327static 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};
1340MODULE_DEVICE_TABLE(i2c, twl_ids);
1341
1342/* One Client Driver , 4 Clients */
1343static 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
1350static int __init twl_init(void)
1351{
1352        return i2c_add_driver(&twl_driver);
1353}
1354subsys_initcall(twl_init);
1355
1356static void __exit twl_exit(void)
1357{
1358        i2c_del_driver(&twl_driver);
1359}
1360module_exit(twl_exit);
1361
1362MODULE_AUTHOR("Texas Instruments, Inc.");
1363MODULE_DESCRIPTION("I2C Core interface for TWL");
1364MODULE_LICENSE("GPL");
1365
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