drivers/mfd/twl6040-core.c

   1 /*
   2  * MFD driver for TWL6040 audio device
   3  *
   4  * Authors:     Misael Lopez Cruz <misael.lopez@ti.com>
   5  *              Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
   6  *              Peter Ujfalusi <peter.ujfalusi@ti.com>
   7  *
   8  * Copyright:   (C) 2011 Texas Instruments, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  22  * 02110-1301 USA
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/types.h>
  28 #include <linux/slab.h>
  29 #include <linux/kernel.h>
  30 #include <linux/err.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/of.h>
  33 #include <linux/of_irq.h>
  34 #include <linux/of_gpio.h>
  35 #include <linux/of_platform.h>
  36 #include <linux/gpio.h>
  37 #include <linux/delay.h>
  38 #include <linux/i2c.h>
  39 #include <linux/regmap.h>
  40 #include <linux/err.h>
  41 #include <linux/mfd/core.h>
  42 #include <linux/mfd/twl6040.h>
  43 #include <linux/regulator/consumer.h>
  44
  45 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
  46 #define TWL6040_NUM_SUPPLIES    (2)
  47
  48 static bool twl6040_has_vibra(struct twl6040_platform_data *pdata,
  49                               struct device_node *node)
  50 {
  51         if (pdata && pdata->vibra)
  52                 return true;
  53
  54 #ifdef CONFIG_OF
  55         if (of_find_node_by_name(node, "vibra"))
  56                 return true;
  57 #endif
  58
  59         return false;
  60 }
  61
  62 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
  63 {
  64         int ret;
  65         unsigned int val;
  66
  67         mutex_lock(&twl6040->io_mutex);
  68         /* Vibra control registers from cache */
  69         if (unlikely(reg == TWL6040_REG_VIBCTLL ||
  70                      reg == TWL6040_REG_VIBCTLR)) {
  71                 val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
  72         } else {
  73                 ret = regmap_read(twl6040->regmap, reg, &val);
  74                 if (ret < 0) {
  75                         mutex_unlock(&twl6040->io_mutex);
  76                         return ret;
  77                 }
  78         }
  79         mutex_unlock(&twl6040->io_mutex);
  80
  81         return val;
  82 }
  83 EXPORT_SYMBOL(twl6040_reg_read);
  84
  85 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
  86 {
  87         int ret;
  88
  89         mutex_lock(&twl6040->io_mutex);
  90         ret = regmap_write(twl6040->regmap, reg, val);
  91         /* Cache the vibra control registers */
  92         if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
  93                 twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
  94         mutex_unlock(&twl6040->io_mutex);
  95
  96         return ret;
  97 }
  98 EXPORT_SYMBOL(twl6040_reg_write);
  99
 100 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 101 {
 102         int ret;
 103
 104         mutex_lock(&twl6040->io_mutex);
 105         ret = regmap_update_bits(twl6040->regmap, reg, mask, mask);
 106         mutex_unlock(&twl6040->io_mutex);
 107         return ret;
 108 }
 109 EXPORT_SYMBOL(twl6040_set_bits);
 110
 111 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 112 {
 113         int ret;
 114
 115         mutex_lock(&twl6040->io_mutex);
 116         ret = regmap_update_bits(twl6040->regmap, reg, mask, 0);
 117         mutex_unlock(&twl6040->io_mutex);
 118         return ret;
 119 }
 120 EXPORT_SYMBOL(twl6040_clear_bits);
 121
 122 /* twl6040 codec manual power-up sequence */
 123 static int twl6040_power_up(struct twl6040 *twl6040)
 124 {
 125         u8 ldoctl, ncpctl, lppllctl;
 126         int ret;
 127
 128         /* enable high-side LDO, reference system and internal oscillator */
 129         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 130         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 131         if (ret)
 132                 return ret;
 133         usleep_range(10000, 10500);
 134
 135         /* enable negative charge pump */
 136         ncpctl = TWL6040_NCPENA;
 137         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 138         if (ret)
 139                 goto ncp_err;
 140         usleep_range(1000, 1500);
 141
 142         /* enable low-side LDO */
 143         ldoctl |= TWL6040_LSLDOENA;
 144         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 145         if (ret)
 146                 goto lsldo_err;
 147         usleep_range(1000, 1500);
 148
 149         /* enable low-power PLL */
 150         lppllctl = TWL6040_LPLLENA;
 151         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 152         if (ret)
 153                 goto lppll_err;
 154         usleep_range(5000, 5500);
 155
 156         /* disable internal oscillator */
 157         ldoctl &= ~TWL6040_OSCENA;
 158         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 159         if (ret)
 160                 goto osc_err;
 161
 162         return 0;
 163
 164 osc_err:
 165         lppllctl &= ~TWL6040_LPLLENA;
 166         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 167 lppll_err:
 168         ldoctl &= ~TWL6040_LSLDOENA;
 169         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 170 lsldo_err:
 171         ncpctl &= ~TWL6040_NCPENA;
 172         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 173 ncp_err:
 174         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 175         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 176
 177         return ret;
 178 }
 179
 180 /* twl6040 manual power-down sequence */
 181 static void twl6040_power_down(struct twl6040 *twl6040)
 182 {
 183         u8 ncpctl, ldoctl, lppllctl;
 184
 185         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 186         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 187         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 188
 189         /* enable internal oscillator */
 190         ldoctl |= TWL6040_OSCENA;
 191         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 192         usleep_range(1000, 1500);
 193
 194         /* disable low-power PLL */
 195         lppllctl &= ~TWL6040_LPLLENA;
 196         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 197
 198         /* disable low-side LDO */
 199         ldoctl &= ~TWL6040_LSLDOENA;
 200         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 201
 202         /* disable negative charge pump */
 203         ncpctl &= ~TWL6040_NCPENA;
 204         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 205
 206         /* disable high-side LDO, reference system and internal oscillator */
 207         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 208         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 209 }
 210
 211 static irqreturn_t twl6040_naudint_handler(int irq, void *data)
 212 {
 213         struct twl6040 *twl6040 = data;
 214         u8 intid, status;
 215
 216         intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 217
 218         if (intid & TWL6040_READYINT)
 219                 complete(&twl6040->ready);
 220
 221         if (intid & TWL6040_THINT) {
 222                 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 223                 if (status & TWL6040_TSHUTDET) {
 224                         dev_warn(twl6040->dev,
 225                                  "Thermal shutdown, powering-off");
 226                         twl6040_power(twl6040, 0);
 227                 } else {
 228                         dev_warn(twl6040->dev,
 229                                  "Leaving thermal shutdown, powering-on");
 230                         twl6040_power(twl6040, 1);
 231                 }
 232         }
 233
 234         return IRQ_HANDLED;
 235 }
 236
 237 static int twl6040_power_up_completion(struct twl6040 *twl6040,
 238                                        int naudint)
 239 {
 240         int time_left;
 241         u8 intid;
 242
 243         time_left = wait_for_completion_timeout(&twl6040->ready,
 244                                                 msecs_to_jiffies(144));
 245         if (!time_left) {
 246                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 247                 if (!(intid & TWL6040_READYINT)) {
 248                         dev_err(twl6040->dev,
 249                                 "timeout waiting for READYINT\n");
 250                         return -ETIMEDOUT;
 251                 }
 252         }
 253
 254         return 0;
 255 }
 256
 257 int twl6040_power(struct twl6040 *twl6040, int on)
 258 {
 259         int audpwron = twl6040->audpwron;
 260         int naudint = twl6040->irq;
 261         int ret = 0;
 262
 263         mutex_lock(&twl6040->mutex);
 264
 265         if (on) {
 266                 /* already powered-up */
 267                 if (twl6040->power_count++)
 268                         goto out;
 269
 270                 if (gpio_is_valid(audpwron)) {
 271                         /* use AUDPWRON line */
 272                         gpio_set_value(audpwron, 1);
 273                         /* wait for power-up completion */
 274                         ret = twl6040_power_up_completion(twl6040, naudint);
 275                         if (ret) {
 276                                 dev_err(twl6040->dev,
 277                                         "automatic power-down failed\n");
 278                                 twl6040->power_count = 0;
 279                                 goto out;
 280                         }
 281                 } else {
 282                         /* use manual power-up sequence */
 283                         ret = twl6040_power_up(twl6040);
 284                         if (ret) {
 285                                 dev_err(twl6040->dev,
 286                                         "manual power-up failed\n");
 287                                 twl6040->power_count = 0;
 288                                 goto out;
 289                         }
 290                 }
 291                 /* Default PLL configuration after power up */
 292                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 293                 twl6040->sysclk = 19200000;
 294                 twl6040->mclk = 32768;
 295         } else {
 296                 /* already powered-down */
 297                 if (!twl6040->power_count) {
 298                         dev_err(twl6040->dev,
 299                                 "device is already powered-off\n");
 300                         ret = -EPERM;
 301                         goto out;
 302                 }
 303
 304                 if (--twl6040->power_count)
 305                         goto out;
 306
 307                 if (gpio_is_valid(audpwron)) {
 308                         /* use AUDPWRON line */
 309                         gpio_set_value(audpwron, 0);
 310
 311                         /* power-down sequence latency */
 312                         usleep_range(500, 700);
 313                 } else {
 314                         /* use manual power-down sequence */
 315                         twl6040_power_down(twl6040);
 316                 }
 317                 twl6040->sysclk = 0;
 318                 twl6040->mclk = 0;
 319         }
 320
 321 out:
 322         mutex_unlock(&twl6040->mutex);
 323         return ret;
 324 }
 325 EXPORT_SYMBOL(twl6040_power);
 326
 327 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 328                     unsigned int freq_in, unsigned int freq_out)
 329 {
 330         u8 hppllctl, lppllctl;
 331         int ret = 0;
 332
 333         mutex_lock(&twl6040->mutex);
 334
 335         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 336         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 337
 338         /* Force full reconfiguration when switching between PLL */
 339         if (pll_id != twl6040->pll) {
 340                 twl6040->sysclk = 0;
 341                 twl6040->mclk = 0;
 342         }
 343
 344         switch (pll_id) {
 345         case TWL6040_SYSCLK_SEL_LPPLL:
 346                 /* low-power PLL divider */
 347                 /* Change the sysclk configuration only if it has been canged */
 348                 if (twl6040->sysclk != freq_out) {
 349                         switch (freq_out) {
 350                         case 17640000:
 351                                 lppllctl |= TWL6040_LPLLFIN;
 352                                 break;
 353                         case 19200000:
 354                                 lppllctl &= ~TWL6040_LPLLFIN;
 355                                 break;
 356                         default:
 357                                 dev_err(twl6040->dev,
 358                                         "freq_out %d not supported\n",
 359                                         freq_out);
 360                                 ret = -EINVAL;
 361                                 goto pll_out;
 362                         }
 363                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 364                                           lppllctl);
 365                 }
 366
 367                 /* The PLL in use has not been change, we can exit */
 368                 if (twl6040->pll == pll_id)
 369                         break;
 370
 371                 switch (freq_in) {
 372                 case 32768:
 373                         lppllctl |= TWL6040_LPLLENA;
 374                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 375                                           lppllctl);
 376                         mdelay(5);
 377                         lppllctl &= ~TWL6040_HPLLSEL;
 378                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 379                                           lppllctl);
 380                         hppllctl &= ~TWL6040_HPLLENA;
 381                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 382                                           hppllctl);
 383                         break;
 384                 default:
 385                         dev_err(twl6040->dev,
 386                                 "freq_in %d not supported\n", freq_in);
 387                         ret = -EINVAL;
 388                         goto pll_out;
 389                 }
 390                 break;
 391         case TWL6040_SYSCLK_SEL_HPPLL:
 392                 /* high-performance PLL can provide only 19.2 MHz */
 393                 if (freq_out != 19200000) {
 394                         dev_err(twl6040->dev,
 395                                 "freq_out %d not supported\n", freq_out);
 396                         ret = -EINVAL;
 397                         goto pll_out;
 398                 }
 399
 400                 if (twl6040->mclk != freq_in) {
 401                         hppllctl &= ~TWL6040_MCLK_MSK;
 402
 403                         switch (freq_in) {
 404                         case 12000000:
 405                                 /* PLL enabled, active mode */
 406                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 407                                             TWL6040_HPLLENA;
 408                                 break;
 409                         case 19200000:
 410                                 /*
 411                                 * PLL disabled
 412                                 * (enable PLL if MCLK jitter quality
 413                                 *  doesn't meet specification)
 414                                 */
 415                                 hppllctl |= TWL6040_MCLK_19200KHZ;
 416                                 break;
 417                         case 26000000:
 418                                 /* PLL enabled, active mode */
 419                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 420                                             TWL6040_HPLLENA;
 421                                 break;
 422                         case 38400000:
 423                                 /* PLL enabled, active mode */
 424                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 425                                             TWL6040_HPLLENA;
 426                                 break;
 427                         default:
 428                                 dev_err(twl6040->dev,
 429                                         "freq_in %d not supported\n", freq_in);
 430                                 ret = -EINVAL;
 431                                 goto pll_out;
 432                         }
 433
 434                         /*
 435                          * enable clock slicer to ensure input waveform is
 436                          * square
 437                          */
 438                         hppllctl |= TWL6040_HPLLSQRENA;
 439
 440                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 441                                           hppllctl);
 442                         usleep_range(500, 700);
 443                         lppllctl |= TWL6040_HPLLSEL;
 444                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 445                                           lppllctl);
 446                         lppllctl &= ~TWL6040_LPLLENA;
 447                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 448                                           lppllctl);
 449                 }
 450                 break;
 451         default:
 452                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 453                 ret = -EINVAL;
 454                 goto pll_out;
 455         }
 456
 457         twl6040->sysclk = freq_out;
 458         twl6040->mclk = freq_in;
 459         twl6040->pll = pll_id;
 460
 461 pll_out:
 462         mutex_unlock(&twl6040->mutex);
 463         return ret;
 464 }
 465 EXPORT_SYMBOL(twl6040_set_pll);
 466
 467 int twl6040_get_pll(struct twl6040 *twl6040)
 468 {
 469         if (twl6040->power_count)
 470                 return twl6040->pll;
 471         else
 472                 return -ENODEV;
 473 }
 474 EXPORT_SYMBOL(twl6040_get_pll);
 475
 476 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 477 {
 478         return twl6040->sysclk;
 479 }
 480 EXPORT_SYMBOL(twl6040_get_sysclk);
 481
 482 /* Get the combined status of the vibra control register */
 483 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 484 {
 485         u8 status;
 486
 487         status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
 488         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 489
 490         return status;
 491 }
 492 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 493
 494 static struct resource twl6040_vibra_rsrc[] = {
 495         {
 496                 .flags = IORESOURCE_IRQ,
 497         },
 498 };
 499
 500 static struct resource twl6040_codec_rsrc[] = {
 501         {
 502                 .flags = IORESOURCE_IRQ,
 503         },
 504 };
 505
 506 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 507 {
 508         /* Register 0 is not readable */
 509         if (!reg)
 510                 return false;
 511         return true;
 512 }
 513
 514 static struct regmap_config twl6040_regmap_config = {
 515         .reg_bits = 8,
 516         .val_bits = 8,
 517         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 518
 519         .readable_reg = twl6040_readable_reg,
 520 };
 521
 522 static int __devinit twl6040_probe(struct i2c_client *client,
 523                                      const struct i2c_device_id *id)
 524 {
 525         struct twl6040_platform_data *pdata = client->dev.platform_data;
 526         struct device_node *node = client->dev.of_node;
 527         struct twl6040 *twl6040;
 528         struct mfd_cell *cell = NULL;
 529         int irq, ret, children = 0;
 530
 531         if (!pdata && !node) {
 532                 dev_err(&client->dev, "Platform data is missing\n");
 533                 return -EINVAL;
 534         }
 535
 536         /* In order to operate correctly we need valid interrupt config */
 537         if (!client->irq) {
 538                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 539                 return -EINVAL;
 540         }
 541
 542         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 543                                GFP_KERNEL);
 544         if (!twl6040) {
 545                 ret = -ENOMEM;
 546                 goto err;
 547         }
 548
 549         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 550         if (IS_ERR(twl6040->regmap)) {
 551                 ret = PTR_ERR(twl6040->regmap);
 552                 goto err;
 553         }
 554
 555         i2c_set_clientdata(client, twl6040);
 556
 557         twl6040->supplies[0].supply = "vio";
 558         twl6040->supplies[1].supply = "v2v1";
 559         ret = regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 560                                  twl6040->supplies);
 561         if (ret != 0) {
 562                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 563                 goto regulator_get_err;
 564         }
 565
 566         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 567         if (ret != 0) {
 568                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 569                 goto power_err;
 570         }
 571
 572         twl6040->dev = &client->dev;
 573         twl6040->irq = client->irq;
 574
 575         mutex_init(&twl6040->mutex);
 576         mutex_init(&twl6040->io_mutex);
 577         init_completion(&twl6040->ready);
 578
 579         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 580
 581         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 582         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
 583                 if (pdata)
 584                         twl6040->audpwron = pdata->audpwron_gpio;
 585                 else
 586                         twl6040->audpwron = of_get_named_gpio(node,
 587                                                 "ti,audpwron-gpio", 0);
 588         } else
 589                 twl6040->audpwron = -EINVAL;
 590
 591         if (gpio_is_valid(twl6040->audpwron)) {
 592                 ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
 593                                        "audpwron");
 594                 if (ret)
 595                         goto gpio_err;
 596         }
 597
 598         /* codec interrupt */
 599         ret = twl6040_irq_init(twl6040);
 600         if (ret)
 601                 goto irq_init_err;
 602
 603         ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
 604                                    NULL, twl6040_naudint_handler, 0,
 605                                    "twl6040_irq_ready", twl6040);
 606         if (ret) {
 607                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
 608                         ret);
 609                 goto irq_err;
 610         }
 611
 612         /* dual-access registers controlled by I2C only */
 613         twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
 614
 615         /*
 616          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 617          * We can add the ASoC codec child whenever this driver has been loaded.
 618          * The ASoC codec can work without pdata, pass the platform_data only if
 619          * it has been provided.
 620          */
 621         irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
 622         cell = &twl6040->cells[children];
 623         cell->name = "twl6040-codec";
 624         twl6040_codec_rsrc[0].start = irq;
 625         twl6040_codec_rsrc[0].end = irq;
 626         cell->resources = twl6040_codec_rsrc;
 627         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 628         if (pdata && pdata->codec) {
 629                 cell->platform_data = pdata->codec;
 630                 cell->pdata_size = sizeof(*pdata->codec);
 631         }
 632         children++;
 633
 634         if (twl6040_has_vibra(pdata, node)) {
 635                 irq = twl6040->irq_base + TWL6040_IRQ_VIB;
 636
 637                 cell = &twl6040->cells[children];
 638                 cell->name = "twl6040-vibra";
 639                 twl6040_vibra_rsrc[0].start = irq;
 640                 twl6040_vibra_rsrc[0].end = irq;
 641                 cell->resources = twl6040_vibra_rsrc;
 642                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 643
 644                 if (pdata && pdata->vibra) {
 645                         cell->platform_data = pdata->vibra;
 646                         cell->pdata_size = sizeof(*pdata->vibra);
 647                 }
 648                 children++;
 649         }
 650
 651         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 652                               NULL, 0);
 653         if (ret)
 654                 goto mfd_err;
 655
 656         return 0;
 657
 658 mfd_err:
 659         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 660 irq_err:
 661         twl6040_irq_exit(twl6040);
 662 irq_init_err:
 663         if (gpio_is_valid(twl6040->audpwron))
 664                 gpio_free(twl6040->audpwron);
 665 gpio_err:
 666         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 667 power_err:
 668         regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 669 regulator_get_err:
 670         i2c_set_clientdata(client, NULL);
 671 err:
 672         return ret;
 673 }
 674
 675 static int __devexit twl6040_remove(struct i2c_client *client)
 676 {
 677         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 678
 679         if (twl6040->power_count)
 680                 twl6040_power(twl6040, 0);
 681
 682         if (gpio_is_valid(twl6040->audpwron))
 683                 gpio_free(twl6040->audpwron);
 684
 685         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 686         twl6040_irq_exit(twl6040);
 687
 688         mfd_remove_devices(&client->dev);
 689         i2c_set_clientdata(client, NULL);
 690
 691         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 692         regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 693
 694         return 0;
 695 }
 696
 697 static const struct i2c_device_id twl6040_i2c_id[] = {
 698         { "twl6040", 0, },
 699         { },
 700 };
 701 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 702
 703 static struct i2c_driver twl6040_driver = {
 704         .driver = {
 705                 .name = "twl6040",
 706                 .owner = THIS_MODULE,
 707         },
 708         .probe          = twl6040_probe,
 709         .remove         = __devexit_p(twl6040_remove),
 710         .id_table       = twl6040_i2c_id,
 711 };
 712
 713 module_i2c_driver(twl6040_driver);
 714
 715 MODULE_DESCRIPTION("TWL6040 MFD");
 716 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 717 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 718 MODULE_LICENSE("GPL");
 719 MODULE_ALIAS("platform:twl6040");