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/platform_device.h>
  31 #include <linux/gpio.h>
  32 #include <linux/delay.h>
  33 #include <linux/i2c.h>
  34 #include <linux/regmap.h>
  35 #include <linux/err.h>
  36 #include <linux/mfd/core.h>
  37 #include <linux/mfd/twl6040.h>
  38
  39 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
  40
  41 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
  42 {
  43         int ret;
  44         unsigned int val;
  45
  46         mutex_lock(&twl6040->io_mutex);
  47         /* Vibra control registers from cache */
  48         if (unlikely(reg == TWL6040_REG_VIBCTLL ||
  49                      reg == TWL6040_REG_VIBCTLR)) {
  50                 val = twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)];
  51         } else {
  52                 ret = regmap_read(twl6040->regmap, reg, &val);
  53                 if (ret < 0) {
  54                         mutex_unlock(&twl6040->io_mutex);
  55                         return ret;
  56                 }
  57         }
  58         mutex_unlock(&twl6040->io_mutex);
  59
  60         return val;
  61 }
  62 EXPORT_SYMBOL(twl6040_reg_read);
  63
  64 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
  65 {
  66         int ret;
  67
  68         mutex_lock(&twl6040->io_mutex);
  69         ret = regmap_write(twl6040->regmap, reg, val);
  70         /* Cache the vibra control registers */
  71         if (reg == TWL6040_REG_VIBCTLL || reg == TWL6040_REG_VIBCTLR)
  72                 twl6040->vibra_ctrl_cache[VIBRACTRL_MEMBER(reg)] = val;
  73         mutex_unlock(&twl6040->io_mutex);
  74
  75         return ret;
  76 }
  77 EXPORT_SYMBOL(twl6040_reg_write);
  78
  79 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
  80 {
  81         int ret;
  82
  83         mutex_lock(&twl6040->io_mutex);
  84         ret = regmap_update_bits(twl6040->regmap, reg, mask, mask);
  85         mutex_unlock(&twl6040->io_mutex);
  86         return ret;
  87 }
  88 EXPORT_SYMBOL(twl6040_set_bits);
  89
  90 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
  91 {
  92         int ret;
  93
  94         mutex_lock(&twl6040->io_mutex);
  95         ret = regmap_update_bits(twl6040->regmap, reg, mask, 0);
  96         mutex_unlock(&twl6040->io_mutex);
  97         return ret;
  98 }
  99 EXPORT_SYMBOL(twl6040_clear_bits);
 100
 101 /* twl6040 codec manual power-up sequence */
 102 static int twl6040_power_up(struct twl6040 *twl6040)
 103 {
 104         u8 ldoctl, ncpctl, lppllctl;
 105         int ret;
 106
 107         /* enable high-side LDO, reference system and internal oscillator */
 108         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 109         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 110         if (ret)
 111                 return ret;
 112         usleep_range(10000, 10500);
 113
 114         /* enable negative charge pump */
 115         ncpctl = TWL6040_NCPENA;
 116         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 117         if (ret)
 118                 goto ncp_err;
 119         usleep_range(1000, 1500);
 120
 121         /* enable low-side LDO */
 122         ldoctl |= TWL6040_LSLDOENA;
 123         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 124         if (ret)
 125                 goto lsldo_err;
 126         usleep_range(1000, 1500);
 127
 128         /* enable low-power PLL */
 129         lppllctl = TWL6040_LPLLENA;
 130         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 131         if (ret)
 132                 goto lppll_err;
 133         usleep_range(5000, 5500);
 134
 135         /* disable internal oscillator */
 136         ldoctl &= ~TWL6040_OSCENA;
 137         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 138         if (ret)
 139                 goto osc_err;
 140
 141         return 0;
 142
 143 osc_err:
 144         lppllctl &= ~TWL6040_LPLLENA;
 145         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 146 lppll_err:
 147         ldoctl &= ~TWL6040_LSLDOENA;
 148         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 149 lsldo_err:
 150         ncpctl &= ~TWL6040_NCPENA;
 151         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 152 ncp_err:
 153         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 154         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 155
 156         return ret;
 157 }
 158
 159 /* twl6040 manual power-down sequence */
 160 static void twl6040_power_down(struct twl6040 *twl6040)
 161 {
 162         u8 ncpctl, ldoctl, lppllctl;
 163
 164         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 165         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 166         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 167
 168         /* enable internal oscillator */
 169         ldoctl |= TWL6040_OSCENA;
 170         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 171         usleep_range(1000, 1500);
 172
 173         /* disable low-power PLL */
 174         lppllctl &= ~TWL6040_LPLLENA;
 175         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 176
 177         /* disable low-side LDO */
 178         ldoctl &= ~TWL6040_LSLDOENA;
 179         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 180
 181         /* disable negative charge pump */
 182         ncpctl &= ~TWL6040_NCPENA;
 183         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 184
 185         /* disable high-side LDO, reference system and internal oscillator */
 186         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 187         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 188 }
 189
 190 static irqreturn_t twl6040_naudint_handler(int irq, void *data)
 191 {
 192         struct twl6040 *twl6040 = data;
 193         u8 intid, status;
 194
 195         intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 196
 197         if (intid & TWL6040_READYINT)
 198                 complete(&twl6040->ready);
 199
 200         if (intid & TWL6040_THINT) {
 201                 status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 202                 if (status & TWL6040_TSHUTDET) {
 203                         dev_warn(twl6040->dev,
 204                                  "Thermal shutdown, powering-off");
 205                         twl6040_power(twl6040, 0);
 206                 } else {
 207                         dev_warn(twl6040->dev,
 208                                  "Leaving thermal shutdown, powering-on");
 209                         twl6040_power(twl6040, 1);
 210                 }
 211         }
 212
 213         return IRQ_HANDLED;
 214 }
 215
 216 static int twl6040_power_up_completion(struct twl6040 *twl6040,
 217                                        int naudint)
 218 {
 219         int time_left;
 220         u8 intid;
 221
 222         time_left = wait_for_completion_timeout(&twl6040->ready,
 223                                                 msecs_to_jiffies(144));
 224         if (!time_left) {
 225                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 226                 if (!(intid & TWL6040_READYINT)) {
 227                         dev_err(twl6040->dev,
 228                                 "timeout waiting for READYINT\n");
 229                         return -ETIMEDOUT;
 230                 }
 231         }
 232
 233         return 0;
 234 }
 235
 236 int twl6040_power(struct twl6040 *twl6040, int on)
 237 {
 238         int audpwron = twl6040->audpwron;
 239         int naudint = twl6040->irq;
 240         int ret = 0;
 241
 242         mutex_lock(&twl6040->mutex);
 243
 244         if (on) {
 245                 /* already powered-up */
 246                 if (twl6040->power_count++)
 247                         goto out;
 248
 249                 if (gpio_is_valid(audpwron)) {
 250                         /* use AUDPWRON line */
 251                         gpio_set_value(audpwron, 1);
 252                         /* wait for power-up completion */
 253                         ret = twl6040_power_up_completion(twl6040, naudint);
 254                         if (ret) {
 255                                 dev_err(twl6040->dev,
 256                                         "automatic power-down failed\n");
 257                                 twl6040->power_count = 0;
 258                                 goto out;
 259                         }
 260                 } else {
 261                         /* use manual power-up sequence */
 262                         ret = twl6040_power_up(twl6040);
 263                         if (ret) {
 264                                 dev_err(twl6040->dev,
 265                                         "manual power-up failed\n");
 266                                 twl6040->power_count = 0;
 267                                 goto out;
 268                         }
 269                 }
 270                 /* Default PLL configuration after power up */
 271                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 272                 twl6040->sysclk = 19200000;
 273                 twl6040->mclk = 32768;
 274         } else {
 275                 /* already powered-down */
 276                 if (!twl6040->power_count) {
 277                         dev_err(twl6040->dev,
 278                                 "device is already powered-off\n");
 279                         ret = -EPERM;
 280                         goto out;
 281                 }
 282
 283                 if (--twl6040->power_count)
 284                         goto out;
 285
 286                 if (gpio_is_valid(audpwron)) {
 287                         /* use AUDPWRON line */
 288                         gpio_set_value(audpwron, 0);
 289
 290                         /* power-down sequence latency */
 291                         usleep_range(500, 700);
 292                 } else {
 293                         /* use manual power-down sequence */
 294                         twl6040_power_down(twl6040);
 295                 }
 296                 twl6040->sysclk = 0;
 297                 twl6040->mclk = 0;
 298         }
 299
 300 out:
 301         mutex_unlock(&twl6040->mutex);
 302         return ret;
 303 }
 304 EXPORT_SYMBOL(twl6040_power);
 305
 306 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 307                     unsigned int freq_in, unsigned int freq_out)
 308 {
 309         u8 hppllctl, lppllctl;
 310         int ret = 0;
 311
 312         mutex_lock(&twl6040->mutex);
 313
 314         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 315         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 316
 317         /* Force full reconfiguration when switching between PLL */
 318         if (pll_id != twl6040->pll) {
 319                 twl6040->sysclk = 0;
 320                 twl6040->mclk = 0;
 321         }
 322
 323         switch (pll_id) {
 324         case TWL6040_SYSCLK_SEL_LPPLL:
 325                 /* low-power PLL divider */
 326                 /* Change the sysclk configuration only if it has been canged */
 327                 if (twl6040->sysclk != freq_out) {
 328                         switch (freq_out) {
 329                         case 17640000:
 330                                 lppllctl |= TWL6040_LPLLFIN;
 331                                 break;
 332                         case 19200000:
 333                                 lppllctl &= ~TWL6040_LPLLFIN;
 334                                 break;
 335                         default:
 336                                 dev_err(twl6040->dev,
 337                                         "freq_out %d not supported\n",
 338                                         freq_out);
 339                                 ret = -EINVAL;
 340                                 goto pll_out;
 341                         }
 342                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 343                                           lppllctl);
 344                 }
 345
 346                 /* The PLL in use has not been change, we can exit */
 347                 if (twl6040->pll == pll_id)
 348                         break;
 349
 350                 switch (freq_in) {
 351                 case 32768:
 352                         lppllctl |= TWL6040_LPLLENA;
 353                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 354                                           lppllctl);
 355                         mdelay(5);
 356                         lppllctl &= ~TWL6040_HPLLSEL;
 357                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 358                                           lppllctl);
 359                         hppllctl &= ~TWL6040_HPLLENA;
 360                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 361                                           hppllctl);
 362                         break;
 363                 default:
 364                         dev_err(twl6040->dev,
 365                                 "freq_in %d not supported\n", freq_in);
 366                         ret = -EINVAL;
 367                         goto pll_out;
 368                 }
 369                 break;
 370         case TWL6040_SYSCLK_SEL_HPPLL:
 371                 /* high-performance PLL can provide only 19.2 MHz */
 372                 if (freq_out != 19200000) {
 373                         dev_err(twl6040->dev,
 374                                 "freq_out %d not supported\n", freq_out);
 375                         ret = -EINVAL;
 376                         goto pll_out;
 377                 }
 378
 379                 if (twl6040->mclk != freq_in) {
 380                         hppllctl &= ~TWL6040_MCLK_MSK;
 381
 382                         switch (freq_in) {
 383                         case 12000000:
 384                                 /* PLL enabled, active mode */
 385                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 386                                             TWL6040_HPLLENA;
 387                                 break;
 388                         case 19200000:
 389                                 /*
 390                                 * PLL disabled
 391                                 * (enable PLL if MCLK jitter quality
 392                                 *  doesn't meet specification)
 393                                 */
 394                                 hppllctl |= TWL6040_MCLK_19200KHZ;
 395                                 break;
 396                         case 26000000:
 397                                 /* PLL enabled, active mode */
 398                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 399                                             TWL6040_HPLLENA;
 400                                 break;
 401                         case 38400000:
 402                                 /* PLL enabled, active mode */
 403                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 404                                             TWL6040_HPLLENA;
 405                                 break;
 406                         default:
 407                                 dev_err(twl6040->dev,
 408                                         "freq_in %d not supported\n", freq_in);
 409                                 ret = -EINVAL;
 410                                 goto pll_out;
 411                         }
 412
 413                         /*
 414                          * enable clock slicer to ensure input waveform is
 415                          * square
 416                          */
 417                         hppllctl |= TWL6040_HPLLSQRENA;
 418
 419                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 420                                           hppllctl);
 421                         usleep_range(500, 700);
 422                         lppllctl |= TWL6040_HPLLSEL;
 423                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 424                                           lppllctl);
 425                         lppllctl &= ~TWL6040_LPLLENA;
 426                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 427                                           lppllctl);
 428                 }
 429                 break;
 430         default:
 431                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 432                 ret = -EINVAL;
 433                 goto pll_out;
 434         }
 435
 436         twl6040->sysclk = freq_out;
 437         twl6040->mclk = freq_in;
 438         twl6040->pll = pll_id;
 439
 440 pll_out:
 441         mutex_unlock(&twl6040->mutex);
 442         return ret;
 443 }
 444 EXPORT_SYMBOL(twl6040_set_pll);
 445
 446 int twl6040_get_pll(struct twl6040 *twl6040)
 447 {
 448         if (twl6040->power_count)
 449                 return twl6040->pll;
 450         else
 451                 return -ENODEV;
 452 }
 453 EXPORT_SYMBOL(twl6040_get_pll);
 454
 455 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 456 {
 457         return twl6040->sysclk;
 458 }
 459 EXPORT_SYMBOL(twl6040_get_sysclk);
 460
 461 /* Get the combined status of the vibra control register */
 462 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 463 {
 464         u8 status;
 465
 466         status = twl6040->vibra_ctrl_cache[0] | twl6040->vibra_ctrl_cache[1];
 467         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 468
 469         return status;
 470 }
 471 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 472
 473 static struct resource twl6040_vibra_rsrc[] = {
 474         {
 475                 .flags = IORESOURCE_IRQ,
 476         },
 477 };
 478
 479 static struct resource twl6040_codec_rsrc[] = {
 480         {
 481                 .flags = IORESOURCE_IRQ,
 482         },
 483 };
 484
 485 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 486 {
 487         /* Register 0 is not readable */
 488         if (!reg)
 489                 return false;
 490         return true;
 491 }
 492
 493 static struct regmap_config twl6040_regmap_config = {
 494         .reg_bits = 8,
 495         .val_bits = 8,
 496         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 497
 498         .readable_reg = twl6040_readable_reg,
 499 };
 500
 501 static int __devinit twl6040_probe(struct i2c_client *client,
 502                                      const struct i2c_device_id *id)
 503 {
 504         struct twl6040_platform_data *pdata = client->dev.platform_data;
 505         struct twl6040 *twl6040;
 506         struct mfd_cell *cell = NULL;
 507         int ret, children = 0;
 508
 509         if (!pdata) {
 510                 dev_err(&client->dev, "Platform data is missing\n");
 511                 return -EINVAL;
 512         }
 513
 514         /* In order to operate correctly we need valid interrupt config */
 515         if (!client->irq || !pdata->irq_base) {
 516                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 517                 return -EINVAL;
 518         }
 519
 520         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 521                                GFP_KERNEL);
 522         if (!twl6040) {
 523                 ret = -ENOMEM;
 524                 goto err;
 525         }
 526
 527         twl6040->regmap = regmap_init_i2c(client, &twl6040_regmap_config);
 528         if (IS_ERR(twl6040->regmap)) {
 529                 ret = PTR_ERR(twl6040->regmap);
 530                 goto err;
 531         }
 532
 533         i2c_set_clientdata(client, twl6040);
 534
 535         twl6040->dev = &client->dev;
 536         twl6040->irq = client->irq;
 537         twl6040->irq_base = pdata->irq_base;
 538
 539         mutex_init(&twl6040->mutex);
 540         mutex_init(&twl6040->io_mutex);
 541         init_completion(&twl6040->ready);
 542
 543         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 544
 545         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 546         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
 547                 twl6040->audpwron = pdata->audpwron_gpio;
 548         else
 549                 twl6040->audpwron = -EINVAL;
 550
 551         if (gpio_is_valid(twl6040->audpwron)) {
 552                 ret = gpio_request_one(twl6040->audpwron, GPIOF_OUT_INIT_LOW,
 553                                        "audpwron");
 554                 if (ret)
 555                         goto gpio1_err;
 556         }
 557
 558         /* codec interrupt */
 559         ret = twl6040_irq_init(twl6040);
 560         if (ret)
 561                 goto gpio2_err;
 562
 563         ret = request_threaded_irq(twl6040->irq_base + TWL6040_IRQ_READY,
 564                                    NULL, twl6040_naudint_handler, 0,
 565                                    "twl6040_irq_ready", twl6040);
 566         if (ret) {
 567                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n",
 568                         ret);
 569                 goto irq_err;
 570         }
 571
 572         /* dual-access registers controlled by I2C only */
 573         twl6040_set_bits(twl6040, TWL6040_REG_ACCCTL, TWL6040_I2CSEL);
 574
 575         if (pdata->codec) {
 576                 int irq = twl6040->irq_base + TWL6040_IRQ_PLUG;
 577
 578                 cell = &twl6040->cells[children];
 579                 cell->name = "twl6040-codec";
 580                 twl6040_codec_rsrc[0].start = irq;
 581                 twl6040_codec_rsrc[0].end = irq;
 582                 cell->resources = twl6040_codec_rsrc;
 583                 cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 584                 cell->platform_data = pdata->codec;
 585                 cell->pdata_size = sizeof(*pdata->codec);
 586                 children++;
 587         }
 588
 589         if (pdata->vibra) {
 590                 int irq = twl6040->irq_base + TWL6040_IRQ_VIB;
 591
 592                 cell = &twl6040->cells[children];
 593                 cell->name = "twl6040-vibra";
 594                 twl6040_vibra_rsrc[0].start = irq;
 595                 twl6040_vibra_rsrc[0].end = irq;
 596                 cell->resources = twl6040_vibra_rsrc;
 597                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 598
 599                 cell->platform_data = pdata->vibra;
 600                 cell->pdata_size = sizeof(*pdata->vibra);
 601                 children++;
 602         }
 603
 604         if (children) {
 605                 ret = mfd_add_devices(&client->dev, -1, twl6040->cells,
 606                                       children, NULL, 0);
 607                 if (ret)
 608                         goto mfd_err;
 609         } else {
 610                 dev_err(&client->dev, "No platform data found for children\n");
 611                 ret = -ENODEV;
 612                 goto mfd_err;
 613         }
 614
 615         return 0;
 616
 617 mfd_err:
 618         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 619 irq_err:
 620         twl6040_irq_exit(twl6040);
 621 gpio2_err:
 622         if (gpio_is_valid(twl6040->audpwron))
 623                 gpio_free(twl6040->audpwron);
 624 gpio1_err:
 625         i2c_set_clientdata(client, NULL);
 626         regmap_exit(twl6040->regmap);
 627 err:
 628         return ret;
 629 }
 630
 631 static int __devexit twl6040_remove(struct i2c_client *client)
 632 {
 633         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 634
 635         if (twl6040->power_count)
 636                 twl6040_power(twl6040, 0);
 637
 638         if (gpio_is_valid(twl6040->audpwron))
 639                 gpio_free(twl6040->audpwron);
 640
 641         free_irq(twl6040->irq_base + TWL6040_IRQ_READY, twl6040);
 642         twl6040_irq_exit(twl6040);
 643
 644         mfd_remove_devices(&client->dev);
 645         i2c_set_clientdata(client, NULL);
 646         regmap_exit(twl6040->regmap);
 647
 648         return 0;
 649 }
 650
 651 static const struct i2c_device_id twl6040_i2c_id[] = {
 652         { "twl6040", 0, },
 653         { },
 654 };
 655 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 656
 657 static struct i2c_driver twl6040_driver = {
 658         .driver = {
 659                 .name = "twl6040",
 660                 .owner = THIS_MODULE,
 661         },
 662         .probe          = twl6040_probe,
 663         .remove         = __devexit_p(twl6040_remove),
 664         .id_table       = twl6040_i2c_id,
 665 };
 666
 667 module_i2c_driver(twl6040_driver);
 668
 669 MODULE_DESCRIPTION("TWL6040 MFD");
 670 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 671 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 672 MODULE_LICENSE("GPL");
 673 MODULE_ALIAS("platform:twl6040");