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         /* Vibra control registers from cache */
  68         if (unlikely(reg == TWL6040_REG_VIBCTLL ||
  69                      reg == TWL6040_REG_VIBCTLR)) {
  70                 val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
  71         } else {
  72                 ret = regmap_read(twl6040->regmap, reg, &val);
  73                 if (ret < 0)
  74                         return ret;
  75         }
  76
  77         return val;
  78 }
  79 EXPORT_SYMBOL(twl6040_reg_read);
  80
  81 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
  82 {
  83         int ret;
  84
  85         ret = regmap_write(twl6040->regmap, reg, val);
  86         /* Cache the vibra control registers */
  87         if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
  88                 twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
  89
  90         return ret;
  91 }
  92 EXPORT_SYMBOL(twl6040_reg_write);
  93
  94 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
  95 {
  96         return regmap_update_bits(twl6040->regmap, reg, mask, mask);
  97 }
  98 EXPORT_SYMBOL(twl6040_set_bits);
  99
 100 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 101 {
 102         return regmap_update_bits(twl6040->regmap, reg, mask, 0);
 103 }
 104 EXPORT_SYMBOL(twl6040_clear_bits);
 105
 106 /* twl6040 codec manual power-up sequence */
 107 static int twl6040_power_up(struct twl6040 *twl6040)
 108 {
 109         u8 ldoctl, ncpctl, lppllctl;
 110         int ret;
 111
 112         /* enable high-side LDO, reference system and internal oscillator */
 113         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 114         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 115         if (ret)
 116                 return ret;
 117         usleep_range(10000, 10500);
 118
 119         /* enable negative charge pump */
 120         ncpctl = TWL6040_NCPENA;
 121         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 122         if (ret)
 123                 goto ncp_err;
 124         usleep_range(1000, 1500);
 125
 126         /* enable low-side LDO */
 127         ldoctl |= TWL6040_LSLDOENA;
 128         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 129         if (ret)
 130                 goto lsldo_err;
 131         usleep_range(1000, 1500);
 132
 133         /* enable low-power PLL */
 134         lppllctl = TWL6040_LPLLENA;
 135         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 136         if (ret)
 137                 goto lppll_err;
 138         usleep_range(5000, 5500);
 139
 140         /* disable internal oscillator */
 141         ldoctl &= ~TWL6040_OSCENA;
 142         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 143         if (ret)
 144                 goto osc_err;
 145
 146         return 0;
 147
 148 osc_err:
 149         lppllctl &= ~TWL6040_LPLLENA;
 150         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 151 lppll_err:
 152         ldoctl &= ~TWL6040_LSLDOENA;
 153         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 154 lsldo_err:
 155         ncpctl &= ~TWL6040_NCPENA;
 156         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 157 ncp_err:
 158         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 159         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 160
 161         return ret;
 162 }
 163
 164 /* twl6040 manual power-down sequence */
 165 static void twl6040_power_down(struct twl6040 *twl6040)
 166 {
 167         u8 ncpctl, ldoctl, lppllctl;
 168
 169         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 170         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 171         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 172
 173         /* enable internal oscillator */
 174         ldoctl |= TWL6040_OSCENA;
 175         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 176         usleep_range(1000, 1500);
 177
 178         /* disable low-power PLL */
 179         lppllctl &= ~TWL6040_LPLLENA;
 180         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 181
 182         /* disable low-side LDO */
 183         ldoctl &= ~TWL6040_LSLDOENA;
 184         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 185
 186         /* disable negative charge pump */
 187         ncpctl &= ~TWL6040_NCPENA;
 188         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 189
 190         /* disable high-side LDO, reference system and internal oscillator */
 191         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 192         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 193 }
 194
 195 static irqreturn_t twl6040_naudint_handler(int irq, void *data)
 196 {
 197         struct twl6040 *twl6040 = data;
 198         u8 intid, status;
 199
 200         intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 201
 202         if (intid & TWL6040_READYINT)
 203                 complete(&twl6040->ready);
 204
 205         if (intid & TWL6040_THINT) {
 206                 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 207                 if (status & TWL6040_TSHUTDET) {
 208                         dev_warn(twl6040->dev,
 209                                  "Thermal shutdown, powering-off");
 210                         twl6040_power(twl6040, 0);
 211                 } else {
 212                         dev_warn(twl6040->dev,
 213                                  "Leaving thermal shutdown, powering-on");
 214                         twl6040_power(twl6040, 1);
 215                 }
 216         }
 217
 218         return IRQ_HANDLED;
 219 }
 220
 221 static int twl6040_power_up_completion(struct twl6040 *twl6040,
 222                                        int naudint)
 223 {
 224         int time_left;
 225         u8 intid;
 226
 227         time_left = wait_for_completion_timeout(&twl6040->ready,
 228                                                 msecs_to_jiffies(144));
 229         if (!time_left) {
 230                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 231                 if (!(intid & TWL6040_READYINT)) {
 232                         dev_err(twl6040->dev,
 233                                 "timeout waiting for READYINT\n");
 234                         return -ETIMEDOUT;
 235                 }
 236         }
 237
 238         return 0;
 239 }
 240
 241 int twl6040_power(struct twl6040 *twl6040, int on)
 242 {
 243         int audpwron = twl6040->audpwron;
 244         int naudint = twl6040->irq;
 245         int ret = 0;
 246
 247         mutex_lock(&twl6040->mutex);
 248
 249         if (on) {
 250                 /* already powered-up */
 251                 if (twl6040->power_count++)
 252                         goto out;
 253
 254                 if (gpio_is_valid(audpwron)) {
 255                         /* use AUDPWRON line */
 256                         gpio_set_value(audpwron, 1);
 257                         /* wait for power-up completion */
 258                         ret = twl6040_power_up_completion(twl6040, naudint);
 259                         if (ret) {
 260                                 dev_err(twl6040->dev,
 261                                         "automatic power-down failed\n");
 262                                 twl6040->power_count = 0;
 263                                 goto out;
 264                         }
 265                 } else {
 266                         /* use manual power-up sequence */
 267                         ret = twl6040_power_up(twl6040);
 268                         if (ret) {
 269                                 dev_err(twl6040->dev,
 270                                         "manual power-up failed\n");
 271                                 twl6040->power_count = 0;
 272                                 goto out;
 273                         }
 274                 }
 275                 /* Default PLL configuration after power up */
 276                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 277                 twl6040->sysclk = 19200000;
 278                 twl6040->mclk = 32768;
 279         } else {
 280                 /* already powered-down */
 281                 if (!twl6040->power_count) {
 282                         dev_err(twl6040->dev,
 283                                 "device is already powered-off\n");
 284                         ret = -EPERM;
 285                         goto out;
 286                 }
 287
 288                 if (--twl6040->power_count)
 289                         goto out;
 290
 291                 if (gpio_is_valid(audpwron)) {
 292                         /* use AUDPWRON line */
 293                         gpio_set_value(audpwron, 0);
 294
 295                         /* power-down sequence latency */
 296                         usleep_range(500, 700);
 297                 } else {
 298                         /* use manual power-down sequence */
 299                         twl6040_power_down(twl6040);
 300                 }
 301                 twl6040->sysclk = 0;
 302                 twl6040->mclk = 0;
 303         }
 304
 305 out:
 306         mutex_unlock(&twl6040->mutex);
 307         return ret;
 308 }
 309 EXPORT_SYMBOL(twl6040_power);
 310
 311 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 312                     unsigned int freq_in, unsigned int freq_out)
 313 {
 314         u8 hppllctl, lppllctl;
 315         int ret = 0;
 316
 317         mutex_lock(&twl6040->mutex);
 318
 319         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 320         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 321
 322         /* Force full reconfiguration when switching between PLL */
 323         if (pll_id != twl6040->pll) {
 324                 twl6040->sysclk = 0;
 325                 twl6040->mclk = 0;
 326         }
 327
 328         switch (pll_id) {
 329         case TWL6040_SYSCLK_SEL_LPPLL:
 330                 /* low-power PLL divider */
 331                 /* Change the sysclk configuration only if it has been canged */
 332                 if (twl6040->sysclk != freq_out) {
 333                         switch (freq_out) {
 334                         case 17640000:
 335                                 lppllctl |= TWL6040_LPLLFIN;
 336                                 break;
 337                         case 19200000:
 338                                 lppllctl &= ~TWL6040_LPLLFIN;
 339                                 break;
 340                         default:
 341                                 dev_err(twl6040->dev,
 342                                         "freq_out %d not supported\n",
 343                                         freq_out);
 344                                 ret = -EINVAL;
 345                                 goto pll_out;
 346                         }
 347                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 348                                           lppllctl);
 349                 }
 350
 351                 /* The PLL in use has not been change, we can exit */
 352                 if (twl6040->pll == pll_id)
 353                         break;
 354
 355                 switch (freq_in) {
 356                 case 32768:
 357                         lppllctl |= TWL6040_LPLLENA;
 358                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 359                                           lppllctl);
 360                         mdelay(5);
 361                         lppllctl &= ~TWL6040_HPLLSEL;
 362                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 363                                           lppllctl);
 364                         hppllctl &= ~TWL6040_HPLLENA;
 365                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 366                                           hppllctl);
 367                         break;
 368                 default:
 369                         dev_err(twl6040->dev,
 370                                 "freq_in %d not supported\n", freq_in);
 371                         ret = -EINVAL;
 372                         goto pll_out;
 373                 }
 374                 break;
 375         case TWL6040_SYSCLK_SEL_HPPLL:
 376                 /* high-performance PLL can provide only 19.2 MHz */
 377                 if (freq_out != 19200000) {
 378                         dev_err(twl6040->dev,
 379                                 "freq_out %d not supported\n", freq_out);
 380                         ret = -EINVAL;
 381                         goto pll_out;
 382                 }
 383
 384                 if (twl6040->mclk != freq_in) {
 385                         hppllctl &= ~TWL6040_MCLK_MSK;
 386
 387                         switch (freq_in) {
 388                         case 12000000:
 389                                 /* PLL enabled, active mode */
 390                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 391                                             TWL6040_HPLLENA;
 392                                 break;
 393                         case 19200000:
 394                                 /*
 395                                 * PLL disabled
 396                                 * (enable PLL if MCLK jitter quality
 397                                 *  doesn't meet specification)
 398                                 */
 399                                 hppllctl |= TWL6040_MCLK_19200KHZ;
 400                                 break;
 401                         case 26000000:
 402                                 /* PLL enabled, active mode */
 403                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 404                                             TWL6040_HPLLENA;
 405                                 break;
 406                         case 38400000:
 407                                 /* PLL enabled, active mode */
 408                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 409                                             TWL6040_HPLLENA;
 410                                 break;
 411                         default:
 412                                 dev_err(twl6040->dev,
 413                                         "freq_in %d not supported\n", freq_in);
 414                                 ret = -EINVAL;
 415                                 goto pll_out;
 416                         }
 417
 418                         /*
 419                          * enable clock slicer to ensure input waveform is
 420                          * square
 421                          */
 422                         hppllctl |= TWL6040_HPLLSQRENA;
 423
 424                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 425                                           hppllctl);
 426                         usleep_range(500, 700);
 427                         lppllctl |= TWL6040_HPLLSEL;
 428                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 429                                           lppllctl);
 430                         lppllctl &= ~TWL6040_LPLLENA;
 431                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 432                                           lppllctl);
 433                 }
 434                 break;
 435         default:
 436                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 437                 ret = -EINVAL;
 438                 goto pll_out;
 439         }
 440
 441         twl6040->sysclk = freq_out;
 442         twl6040->mclk = freq_in;
 443         twl6040->pll = pll_id;
 444
 445 pll_out:
 446         mutex_unlock(&twl6040->mutex);
 447         return ret;
 448 }
 449 EXPORT_SYMBOL(twl6040_set_pll);
 450
 451 int twl6040_get_pll(struct twl6040 *twl6040)
 452 {
 453         if (twl6040->power_count)
 454                 return twl6040->pll;
 455         else
 456                 return -ENODEV;
 457 }
 458 EXPORT_SYMBOL(twl6040_get_pll);
 459
 460 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 461 {
 462         return twl6040->sysclk;
 463 }
 464 EXPORT_SYMBOL(twl6040_get_sysclk);
 465
 466 /* Get the combined status of the vibra control register */
 467 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 468 {
 469         u8 status;
 470
 471         status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
 472         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 473
 474         return status;
 475 }
 476 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 477
 478 static struct resource twl6040_vibra_rsrc[] = {
 479         {
 480                 .flags = IORESOURCE_IRQ,
 481         },
 482 };
 483
 484 static struct resource twl6040_codec_rsrc[] = {
 485         {
 486                 .flags = IORESOURCE_IRQ,
 487         },
 488 };
 489
 490 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 491 {
 492         /* Register 0 is not readable */
 493         if (!reg)
 494                 return false;
 495         return true;
 496 }
 497
 498 static struct regmap_config twl6040_regmap_config = {
 499         .reg_bits = 8,
 500         .val_bits = 8,
 501         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 502
 503         .readable_reg = twl6040_readable_reg,
 504 };
 505
 506 static int __devinit twl6040_probe(struct i2c_client *client,
 507                                      const struct i2c_device_id *id)
 508 {
 509         struct twl6040_platform_data *pdata = client->dev.platform_data;
 510         struct device_node *node = client->dev.of_node;
 511         struct twl6040 *twl6040;
 512         struct mfd_cell *cell = NULL;
 513         int irq, ret, children = 0;
 514
 515         if (!pdata && !node) {
 516                 dev_err(&client->dev, "Platform data is missing\n");
 517                 return -EINVAL;
 518         }
 519
 520         /* In order to operate correctly we need valid interrupt config */
 521         if (!client->irq) {
 522                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 523                 return -EINVAL;
 524         }
 525
 526         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 527                                GFP_KERNEL);
 528         if (!twl6040) {
 529                 ret = -ENOMEM;
 530                 goto err;
 531         }
 532
 533         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 534         if (IS_ERR(twl6040->regmap)) {
 535                 ret = PTR_ERR(twl6040->regmap);
 536                 goto err;
 537         }
 538
 539         i2c_set_clientdata(client, twl6040);
 540
 541         twl6040->supplies[0].supply = "vio";
 542         twl6040->supplies[1].supply = "v2v1";
 543         ret = regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 544                                  twl6040->supplies);
 545         if (ret != 0) {
 546                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 547                 goto regulator_get_err;
 548         }
 549
 550         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 551         if (ret != 0) {
 552                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 553                 goto power_err;
 554         }
 555
 556         twl6040->dev = &client->dev;
 557         twl6040->irq = client->irq;
 558
 559         mutex_init(&twl6040->mutex);
 560         init_completion(&twl6040->ready);
 561
 562         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 563
 564         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 565         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
 566                 if (pdata)
 567                         twl6040->audpwron = pdata->audpwron_gpio;
 568                 else
 569                         twl6040->audpwron = of_get_named_gpio(node,
 570                                                 "ti,audpwron-gpio", 0);
 571         } else
 572                 twl6040->audpwron = -EINVAL;
 573
 574         if (gpio_is_valid(twl6040->audpwron)) {
 575                 ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
 576                                        "audpwron");
 577                 if (ret)
 578                         goto gpio_err;
 579         }
 580
 581         /* codec interrupt */
 582         ret = twl6040_irq_init(twl6040);
 583         if (ret)
 584                 goto irq_init_err;
 585
 586         ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
 587                                    NULL, twl6040_naudint_handler, IRQF_ONESHOT,
 588                                    "twl6040_irq_ready", twl6040);
 589         if (ret) {
 590                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
 591                         ret);
 592                 goto irq_err;
 593         }
 594
 595         /* dual-access registers controlled by I2C only */
 596         twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
 597
 598         /*
 599          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 600          * We can add the ASoC codec child whenever this driver has been loaded.
 601          * The ASoC codec can work without pdata, pass the platform_data only if
 602          * it has been provided.
 603          */
 604         irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
 605         cell = &twl6040->cells[children];
 606         cell->name = "twl6040-codec";
 607         twl6040_codec_rsrc[0].start = irq;
 608         twl6040_codec_rsrc[0].end = irq;
 609         cell->resources = twl6040_codec_rsrc;
 610         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 611         if (pdata && pdata->codec) {
 612                 cell->platform_data = pdata->codec;
 613                 cell->pdata_size = sizeof(*pdata->codec);
 614         }
 615         children++;
 616
 617         if (twl6040_has_vibra(pdata, node)) {
 618                 irq = twl6040->irq_base + TWL6040_IRQ_VIB;
 619
 620                 cell = &twl6040->cells[children];
 621                 cell->name = "twl6040-vibra";
 622                 twl6040_vibra_rsrc[0].start = irq;
 623                 twl6040_vibra_rsrc[0].end = irq;
 624                 cell->resources = twl6040_vibra_rsrc;
 625                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 626
 627                 if (pdata && pdata->vibra) {
 628                         cell->platform_data = pdata->vibra;
 629                         cell->pdata_size = sizeof(*pdata->vibra);
 630                 }
 631                 children++;
 632         }
 633
 634         /*
 635          * Enable the GPO driver in the following cases:
 636          * DT booted kernel or legacy boot with valid gpo platform_data
 637          */
 638         if (!pdata || (pdata && pdata->gpo)) {
 639                 cell = &twl6040->cells[children];
 640                 cell->name = "twl6040-gpo";
 641
 642                 if (pdata) {
 643                         cell->platform_data = pdata->gpo;
 644                         cell->pdata_size = sizeof(*pdata->gpo);
 645                 }
 646                 children++;
 647         }
 648
 649         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 650                               NULL, 0, NULL);
 651         if (ret)
 652                 goto mfd_err;
 653
 654         return 0;
 655
 656 mfd_err:
 657         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 658 irq_err:
 659         twl6040_irq_exit(twl6040);
 660 irq_init_err:
 661         if (gpio_is_valid(twl6040->audpwron))
 662                 gpio_free(twl6040->audpwron);
 663 gpio_err:
 664         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 665 power_err:
 666         regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 667 regulator_get_err:
 668         i2c_set_clientdata(client, NULL);
 669 err:
 670         return ret;
 671 }
 672
 673 static int __devexit twl6040_remove(struct i2c_client *client)
 674 {
 675         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 676
 677         if (twl6040->power_count)
 678                 twl6040_power(twl6040, 0);
 679
 680         if (gpio_is_valid(twl6040->audpwron))
 681                 gpio_free(twl6040->audpwron);
 682
 683         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 684         twl6040_irq_exit(twl6040);
 685
 686         mfd_remove_devices(&client->dev);
 687         i2c_set_clientdata(client, NULL);
 688
 689         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 690         regulator_bulk_free(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 691
 692         return 0;
 693 }
 694
 695 static const struct i2c_device_id twl6040_i2c_id[] = {
 696         { "twl6040", 0, },
 697         { "twl6041", 0, },
 698         { },
 699 };
 700 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 701
 702 static struct i2c_driver twl6040_driver = {
 703         .driver = {
 704                 .name = "twl6040",
 705                 .owner = THIS_MODULE,
 706         },
 707         .probe          = twl6040_probe,
 708         .remove         = __devexit_p(twl6040_remove),
 709         .id_table       = twl6040_i2c_id,
 710 };
 711
 712 module_i2c_driver(twl6040_driver);
 713
 714 MODULE_DESCRIPTION("TWL6040 MFD");
 715 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 716 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 717 MODULE_LICENSE("GPL");
 718 MODULE_ALIAS("platform:twl6040");