drivers/mfd/twl6040.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/mfd/core.h>
  41 #include <linux/mfd/twl6040.h>
  42 #include <linux/regulator/consumer.h>
  43
  44 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
  45 #define TWL6040_NUM_SUPPLIES    (2)
  46
  47 static const struct reg_default twl6040_defaults[] = {
  48         { 0x01, 0x4B }, /* REG_ASICID   (ro) */
  49         { 0x02, 0x00 }, /* REG_ASICREV  (ro) */
  50         { 0x03, 0x00 }, /* REG_INTID    */
  51         { 0x04, 0x00 }, /* REG_INTMR    */
  52         { 0x05, 0x00 }, /* REG_NCPCTRL  */
  53         { 0x06, 0x00 }, /* REG_LDOCTL   */
  54         { 0x07, 0x60 }, /* REG_HPPLLCTL */
  55         { 0x08, 0x00 }, /* REG_LPPLLCTL */
  56         { 0x09, 0x4A }, /* REG_LPPLLDIV */
  57         { 0x0A, 0x00 }, /* REG_AMICBCTL */
  58         { 0x0B, 0x00 }, /* REG_DMICBCTL */
  59         { 0x0C, 0x00 }, /* REG_MICLCTL  */
  60         { 0x0D, 0x00 }, /* REG_MICRCTL  */
  61         { 0x0E, 0x00 }, /* REG_MICGAIN  */
  62         { 0x0F, 0x1B }, /* REG_LINEGAIN */
  63         { 0x10, 0x00 }, /* REG_HSLCTL   */
  64         { 0x11, 0x00 }, /* REG_HSRCTL   */
  65         { 0x12, 0x00 }, /* REG_HSGAIN   */
  66         { 0x13, 0x00 }, /* REG_EARCTL   */
  67         { 0x14, 0x00 }, /* REG_HFLCTL   */
  68         { 0x15, 0x00 }, /* REG_HFLGAIN  */
  69         { 0x16, 0x00 }, /* REG_HFRCTL   */
  70         { 0x17, 0x00 }, /* REG_HFRGAIN  */
  71         { 0x18, 0x00 }, /* REG_VIBCTLL  */
  72         { 0x19, 0x00 }, /* REG_VIBDATL  */
  73         { 0x1A, 0x00 }, /* REG_VIBCTLR  */
  74         { 0x1B, 0x00 }, /* REG_VIBDATR  */
  75         { 0x1C, 0x00 }, /* REG_HKCTL1   */
  76         { 0x1D, 0x00 }, /* REG_HKCTL2   */
  77         { 0x1E, 0x00 }, /* REG_GPOCTL   */
  78         { 0x1F, 0x00 }, /* REG_ALB      */
  79         { 0x20, 0x00 }, /* REG_DLB      */
  80         /* 0x28, REG_TRIM1 */
  81         /* 0x29, REG_TRIM2 */
  82         /* 0x2A, REG_TRIM3 */
  83         /* 0x2B, REG_HSOTRIM */
  84         /* 0x2C, REG_HFOTRIM */
  85         { 0x2D, 0x08 }, /* REG_ACCCTL   */
  86         { 0x2E, 0x00 }, /* REG_STATUS   (ro) */
  87 };
  88
  89 static struct reg_sequence twl6040_patch[] = {
  90         /*
  91          * Select I2C bus access to dual access registers
  92          * Interrupt register is cleared on read
  93          * Select fast mode for i2c (400KHz)
  94          */
  95         { TWL6040_REG_ACCCTL,
  96                 TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
  97 };
  98
  99
 100 static bool twl6040_has_vibra(struct device_node *parent)
 101 {
 102         struct device_node *node;
 103
 104         node = of_get_child_by_name(parent, "vibra");
 105         if (node) {
 106                 of_node_put(node);
 107                 return true;
 108         }
 109
 110         return false;
 111 }
 112
 113 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
 114 {
 115         int ret;
 116         unsigned int val;
 117
 118         ret = regmap_read(twl6040->regmap, reg, &val);
 119         if (ret < 0)
 120                 return ret;
 121
 122         return val;
 123 }
 124 EXPORT_SYMBOL(twl6040_reg_read);
 125
 126 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
 127 {
 128         int ret;
 129
 130         ret = regmap_write(twl6040->regmap, reg, val);
 131
 132         return ret;
 133 }
 134 EXPORT_SYMBOL(twl6040_reg_write);
 135
 136 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 137 {
 138         return regmap_update_bits(twl6040->regmap, reg, mask, mask);
 139 }
 140 EXPORT_SYMBOL(twl6040_set_bits);
 141
 142 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 143 {
 144         return regmap_update_bits(twl6040->regmap, reg, mask, 0);
 145 }
 146 EXPORT_SYMBOL(twl6040_clear_bits);
 147
 148 /* twl6040 codec manual power-up sequence */
 149 static int twl6040_power_up_manual(struct twl6040 *twl6040)
 150 {
 151         u8 ldoctl, ncpctl, lppllctl;
 152         int ret;
 153
 154         /* enable high-side LDO, reference system and internal oscillator */
 155         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 156         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 157         if (ret)
 158                 return ret;
 159         usleep_range(10000, 10500);
 160
 161         /* enable negative charge pump */
 162         ncpctl = TWL6040_NCPENA;
 163         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 164         if (ret)
 165                 goto ncp_err;
 166         usleep_range(1000, 1500);
 167
 168         /* enable low-side LDO */
 169         ldoctl |= TWL6040_LSLDOENA;
 170         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 171         if (ret)
 172                 goto lsldo_err;
 173         usleep_range(1000, 1500);
 174
 175         /* enable low-power PLL */
 176         lppllctl = TWL6040_LPLLENA;
 177         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 178         if (ret)
 179                 goto lppll_err;
 180         usleep_range(5000, 5500);
 181
 182         /* disable internal oscillator */
 183         ldoctl &= ~TWL6040_OSCENA;
 184         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 185         if (ret)
 186                 goto osc_err;
 187
 188         return 0;
 189
 190 osc_err:
 191         lppllctl &= ~TWL6040_LPLLENA;
 192         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 193 lppll_err:
 194         ldoctl &= ~TWL6040_LSLDOENA;
 195         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 196 lsldo_err:
 197         ncpctl &= ~TWL6040_NCPENA;
 198         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 199 ncp_err:
 200         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 201         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 202
 203         dev_err(twl6040->dev, "manual power-up failed\n");
 204         return ret;
 205 }
 206
 207 /* twl6040 manual power-down sequence */
 208 static void twl6040_power_down_manual(struct twl6040 *twl6040)
 209 {
 210         u8 ncpctl, ldoctl, lppllctl;
 211
 212         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 213         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 214         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 215
 216         /* enable internal oscillator */
 217         ldoctl |= TWL6040_OSCENA;
 218         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 219         usleep_range(1000, 1500);
 220
 221         /* disable low-power PLL */
 222         lppllctl &= ~TWL6040_LPLLENA;
 223         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 224
 225         /* disable low-side LDO */
 226         ldoctl &= ~TWL6040_LSLDOENA;
 227         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 228
 229         /* disable negative charge pump */
 230         ncpctl &= ~TWL6040_NCPENA;
 231         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 232
 233         /* disable high-side LDO, reference system and internal oscillator */
 234         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 235         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 236 }
 237
 238 static irqreturn_t twl6040_readyint_handler(int irq, void *data)
 239 {
 240         struct twl6040 *twl6040 = data;
 241
 242         complete(&twl6040->ready);
 243
 244         return IRQ_HANDLED;
 245 }
 246
 247 static irqreturn_t twl6040_thint_handler(int irq, void *data)
 248 {
 249         struct twl6040 *twl6040 = data;
 250         u8 status;
 251
 252         status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 253         if (status & TWL6040_TSHUTDET) {
 254                 dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
 255                 twl6040_power(twl6040, 0);
 256         } else {
 257                 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
 258                 twl6040_power(twl6040, 1);
 259         }
 260
 261         return IRQ_HANDLED;
 262 }
 263
 264 static int twl6040_power_up_automatic(struct twl6040 *twl6040)
 265 {
 266         int time_left;
 267
 268         gpio_set_value(twl6040->audpwron, 1);
 269
 270         time_left = wait_for_completion_timeout(&twl6040->ready,
 271                                                 msecs_to_jiffies(144));
 272         if (!time_left) {
 273                 u8 intid;
 274
 275                 dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
 276                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 277                 if (!(intid & TWL6040_READYINT)) {
 278                         dev_err(twl6040->dev, "automatic power-up failed\n");
 279                         gpio_set_value(twl6040->audpwron, 0);
 280                         return -ETIMEDOUT;
 281                 }
 282         }
 283
 284         return 0;
 285 }
 286
 287 int twl6040_power(struct twl6040 *twl6040, int on)
 288 {
 289         int ret = 0;
 290
 291         mutex_lock(&twl6040->mutex);
 292
 293         if (on) {
 294                 /* already powered-up */
 295                 if (twl6040->power_count++)
 296                         goto out;
 297
 298                 clk_prepare_enable(twl6040->clk32k);
 299
 300                 /* Allow writes to the chip */
 301                 regcache_cache_only(twl6040->regmap, false);
 302
 303                 if (gpio_is_valid(twl6040->audpwron)) {
 304                         /* use automatic power-up sequence */
 305                         ret = twl6040_power_up_automatic(twl6040);
 306                         if (ret) {
 307                                 twl6040->power_count = 0;
 308                                 goto out;
 309                         }
 310                 } else {
 311                         /* use manual power-up sequence */
 312                         ret = twl6040_power_up_manual(twl6040);
 313                         if (ret) {
 314                                 twl6040->power_count = 0;
 315                                 goto out;
 316                         }
 317                 }
 318
 319                 /*
 320                  * Register access can produce errors after power-up unless we
 321                  * wait at least 8ms based on measurements on duovero.
 322                  */
 323                 usleep_range(10000, 12000);
 324
 325                 /* Sync with the HW */
 326                 ret = regcache_sync(twl6040->regmap);
 327                 if (ret) {
 328                         dev_err(twl6040->dev, "Failed to sync with the HW: %i\n",
 329                                 ret);
 330                         goto out;
 331                 }
 332
 333                 /* Default PLL configuration after power up */
 334                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 335                 twl6040->sysclk = 19200000;
 336                 twl6040->mclk = 32768;
 337         } else {
 338                 /* already powered-down */
 339                 if (!twl6040->power_count) {
 340                         dev_err(twl6040->dev,
 341                                 "device is already powered-off\n");
 342                         ret = -EPERM;
 343                         goto out;
 344                 }
 345
 346                 if (--twl6040->power_count)
 347                         goto out;
 348
 349                 if (gpio_is_valid(twl6040->audpwron)) {
 350                         /* use AUDPWRON line */
 351                         gpio_set_value(twl6040->audpwron, 0);
 352
 353                         /* power-down sequence latency */
 354                         usleep_range(500, 700);
 355                 } else {
 356                         /* use manual power-down sequence */
 357                         twl6040_power_down_manual(twl6040);
 358                 }
 359
 360                 /* Set regmap to cache only and mark it as dirty */
 361                 regcache_cache_only(twl6040->regmap, true);
 362                 regcache_mark_dirty(twl6040->regmap);
 363
 364                 twl6040->sysclk = 0;
 365                 twl6040->mclk = 0;
 366
 367                 clk_disable_unprepare(twl6040->clk32k);
 368         }
 369
 370 out:
 371         mutex_unlock(&twl6040->mutex);
 372         return ret;
 373 }
 374 EXPORT_SYMBOL(twl6040_power);
 375
 376 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 377                     unsigned int freq_in, unsigned int freq_out)
 378 {
 379         u8 hppllctl, lppllctl;
 380         int ret = 0;
 381
 382         mutex_lock(&twl6040->mutex);
 383
 384         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 385         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 386
 387         /* Force full reconfiguration when switching between PLL */
 388         if (pll_id != twl6040->pll) {
 389                 twl6040->sysclk = 0;
 390                 twl6040->mclk = 0;
 391         }
 392
 393         switch (pll_id) {
 394         case TWL6040_SYSCLK_SEL_LPPLL:
 395                 /* low-power PLL divider */
 396                 /* Change the sysclk configuration only if it has been canged */
 397                 if (twl6040->sysclk != freq_out) {
 398                         switch (freq_out) {
 399                         case 17640000:
 400                                 lppllctl |= TWL6040_LPLLFIN;
 401                                 break;
 402                         case 19200000:
 403                                 lppllctl &= ~TWL6040_LPLLFIN;
 404                                 break;
 405                         default:
 406                                 dev_err(twl6040->dev,
 407                                         "freq_out %d not supported\n",
 408                                         freq_out);
 409                                 ret = -EINVAL;
 410                                 goto pll_out;
 411                         }
 412                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 413                                           lppllctl);
 414                 }
 415
 416                 /* The PLL in use has not been change, we can exit */
 417                 if (twl6040->pll == pll_id)
 418                         break;
 419
 420                 switch (freq_in) {
 421                 case 32768:
 422                         lppllctl |= TWL6040_LPLLENA;
 423                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 424                                           lppllctl);
 425                         mdelay(5);
 426                         lppllctl &= ~TWL6040_HPLLSEL;
 427                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 428                                           lppllctl);
 429                         hppllctl &= ~TWL6040_HPLLENA;
 430                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 431                                           hppllctl);
 432                         break;
 433                 default:
 434                         dev_err(twl6040->dev,
 435                                 "freq_in %d not supported\n", freq_in);
 436                         ret = -EINVAL;
 437                         goto pll_out;
 438                 }
 439                 break;
 440         case TWL6040_SYSCLK_SEL_HPPLL:
 441                 /* high-performance PLL can provide only 19.2 MHz */
 442                 if (freq_out != 19200000) {
 443                         dev_err(twl6040->dev,
 444                                 "freq_out %d not supported\n", freq_out);
 445                         ret = -EINVAL;
 446                         goto pll_out;
 447                 }
 448
 449                 if (twl6040->mclk != freq_in) {
 450                         hppllctl &= ~TWL6040_MCLK_MSK;
 451
 452                         switch (freq_in) {
 453                         case 12000000:
 454                                 /* PLL enabled, active mode */
 455                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 456                                             TWL6040_HPLLENA;
 457                                 break;
 458                         case 19200000:
 459                                 /* PLL enabled, bypass mode */
 460                                 hppllctl |= TWL6040_MCLK_19200KHZ |
 461                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 462                                 break;
 463                         case 26000000:
 464                                 /* PLL enabled, active mode */
 465                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 466                                             TWL6040_HPLLENA;
 467                                 break;
 468                         case 38400000:
 469                                 /* PLL enabled, bypass mode */
 470                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 471                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 472                                 break;
 473                         default:
 474                                 dev_err(twl6040->dev,
 475                                         "freq_in %d not supported\n", freq_in);
 476                                 ret = -EINVAL;
 477                                 goto pll_out;
 478                         }
 479
 480                         /*
 481                          * enable clock slicer to ensure input waveform is
 482                          * square
 483                          */
 484                         hppllctl |= TWL6040_HPLLSQRENA;
 485
 486                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 487                                           hppllctl);
 488                         usleep_range(500, 700);
 489                         lppllctl |= TWL6040_HPLLSEL;
 490                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 491                                           lppllctl);
 492                         lppllctl &= ~TWL6040_LPLLENA;
 493                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 494                                           lppllctl);
 495                 }
 496                 break;
 497         default:
 498                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 499                 ret = -EINVAL;
 500                 goto pll_out;
 501         }
 502
 503         twl6040->sysclk = freq_out;
 504         twl6040->mclk = freq_in;
 505         twl6040->pll = pll_id;
 506
 507 pll_out:
 508         mutex_unlock(&twl6040->mutex);
 509         return ret;
 510 }
 511 EXPORT_SYMBOL(twl6040_set_pll);
 512
 513 int twl6040_get_pll(struct twl6040 *twl6040)
 514 {
 515         if (twl6040->power_count)
 516                 return twl6040->pll;
 517         else
 518                 return -ENODEV;
 519 }
 520 EXPORT_SYMBOL(twl6040_get_pll);
 521
 522 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 523 {
 524         return twl6040->sysclk;
 525 }
 526 EXPORT_SYMBOL(twl6040_get_sysclk);
 527
 528 /* Get the combined status of the vibra control register */
 529 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 530 {
 531         unsigned int reg;
 532         int ret;
 533         u8 status;
 534
 535         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, &reg);
 536         if (ret != 0)
 537                 return ret;
 538         status = reg;
 539
 540         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, &reg);
 541         if (ret != 0)
 542                 return ret;
 543         status |= reg;
 544
 545         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 546
 547         return status;
 548 }
 549 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 550
 551 static struct resource twl6040_vibra_rsrc[] = {
 552         {
 553                 .flags = IORESOURCE_IRQ,
 554         },
 555 };
 556
 557 static struct resource twl6040_codec_rsrc[] = {
 558         {
 559                 .flags = IORESOURCE_IRQ,
 560         },
 561 };
 562
 563 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 564 {
 565         /* Register 0 is not readable */
 566         if (!reg)
 567                 return false;
 568         return true;
 569 }
 570
 571 static bool twl6040_volatile_reg(struct device *dev, unsigned int reg)
 572 {
 573         switch (reg) {
 574         case TWL6040_REG_ASICID:
 575         case TWL6040_REG_ASICREV:
 576         case TWL6040_REG_INTID:
 577         case TWL6040_REG_LPPLLCTL:
 578         case TWL6040_REG_HPPLLCTL:
 579         case TWL6040_REG_STATUS:
 580                 return true;
 581         default:
 582                 return false;
 583         }
 584 }
 585
 586 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
 587 {
 588         switch (reg) {
 589         case TWL6040_REG_ASICID:
 590         case TWL6040_REG_ASICREV:
 591         case TWL6040_REG_STATUS:
 592                 return false;
 593         default:
 594                 return true;
 595         }
 596 }
 597
 598 static const struct regmap_config twl6040_regmap_config = {
 599         .reg_bits = 8,
 600         .val_bits = 8,
 601
 602         .reg_defaults = twl6040_defaults,
 603         .num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
 604
 605         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 606
 607         .readable_reg = twl6040_readable_reg,
 608         .volatile_reg = twl6040_volatile_reg,
 609         .writeable_reg = twl6040_writeable_reg,
 610
 611         .cache_type = REGCACHE_RBTREE,
 612 };
 613
 614 static const struct regmap_irq twl6040_irqs[] = {
 615         { .reg_offset = 0, .mask = TWL6040_THINT, },
 616         { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
 617         { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
 618         { .reg_offset = 0, .mask = TWL6040_HFINT, },
 619         { .reg_offset = 0, .mask = TWL6040_VIBINT, },
 620         { .reg_offset = 0, .mask = TWL6040_READYINT, },
 621 };
 622
 623 static struct regmap_irq_chip twl6040_irq_chip = {
 624         .name = "twl6040",
 625         .irqs = twl6040_irqs,
 626         .num_irqs = ARRAY_SIZE(twl6040_irqs),
 627
 628         .num_regs = 1,
 629         .status_base = TWL6040_REG_INTID,
 630         .mask_base = TWL6040_REG_INTMR,
 631 };
 632
 633 static int twl6040_probe(struct i2c_client *client,
 634                          const struct i2c_device_id *id)
 635 {
 636         struct device_node *node = client->dev.of_node;
 637         struct twl6040 *twl6040;
 638         struct mfd_cell *cell = NULL;
 639         int irq, ret, children = 0;
 640
 641         if (!node) {
 642                 dev_err(&client->dev, "of node is missing\n");
 643                 return -EINVAL;
 644         }
 645
 646         /* In order to operate correctly we need valid interrupt config */
 647         if (!client->irq) {
 648                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 649                 return -EINVAL;
 650         }
 651
 652         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 653                                GFP_KERNEL);
 654         if (!twl6040)
 655                 return -ENOMEM;
 656
 657         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 658         if (IS_ERR(twl6040->regmap))
 659                 return PTR_ERR(twl6040->regmap);
 660
 661         i2c_set_clientdata(client, twl6040);
 662
 663         twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
 664         if (IS_ERR(twl6040->clk32k)) {
 665                 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
 666                         return -EPROBE_DEFER;
 667                 dev_info(&client->dev, "clk32k is not handled\n");
 668                 twl6040->clk32k = NULL;
 669         }
 670
 671         twl6040->supplies[0].supply = "vio";
 672         twl6040->supplies[1].supply = "v2v1";
 673         ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 674                                       twl6040->supplies);
 675         if (ret != 0) {
 676                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 677                 return ret;
 678         }
 679
 680         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 681         if (ret != 0) {
 682                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 683                 return ret;
 684         }
 685
 686         twl6040->dev = &client->dev;
 687         twl6040->irq = client->irq;
 688
 689         mutex_init(&twl6040->mutex);
 690         init_completion(&twl6040->ready);
 691
 692         regmap_register_patch(twl6040->regmap, twl6040_patch,
 693                               ARRAY_SIZE(twl6040_patch));
 694
 695         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 696         if (twl6040->rev < 0) {
 697                 dev_err(&client->dev, "Failed to read revision register: %d\n",
 698                         twl6040->rev);
 699                 ret = twl6040->rev;
 700                 goto gpio_err;
 701         }
 702
 703         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 704         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
 705                 twl6040->audpwron = of_get_named_gpio(node,
 706                                                       "ti,audpwron-gpio", 0);
 707         else
 708                 twl6040->audpwron = -EINVAL;
 709
 710         if (gpio_is_valid(twl6040->audpwron)) {
 711                 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
 712                                             GPIOF_OUT_INIT_LOW, "audpwron");
 713                 if (ret)
 714                         goto gpio_err;
 715
 716                 /* Clear any pending interrupt */
 717                 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 718         }
 719
 720         ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
 721                                   0, &twl6040_irq_chip, &twl6040->irq_data);
 722         if (ret < 0)
 723                 goto gpio_err;
 724
 725         twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
 726                                                  TWL6040_IRQ_READY);
 727         twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
 728                                               TWL6040_IRQ_TH);
 729
 730         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
 731                                         twl6040_readyint_handler, IRQF_ONESHOT,
 732                                         "twl6040_irq_ready", twl6040);
 733         if (ret) {
 734                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
 735                 goto readyirq_err;
 736         }
 737
 738         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
 739                                         twl6040_thint_handler, IRQF_ONESHOT,
 740                                         "twl6040_irq_th", twl6040);
 741         if (ret) {
 742                 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
 743                 goto readyirq_err;
 744         }
 745
 746         /*
 747          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 748          * We can add the ASoC codec child whenever this driver has been loaded.
 749          */
 750         irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
 751         cell = &twl6040->cells[children];
 752         cell->name = "twl6040-codec";
 753         twl6040_codec_rsrc[0].start = irq;
 754         twl6040_codec_rsrc[0].end = irq;
 755         cell->resources = twl6040_codec_rsrc;
 756         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 757         children++;
 758
 759         /* Vibra input driver support */
 760         if (twl6040_has_vibra(node)) {
 761                 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
 762
 763                 cell = &twl6040->cells[children];
 764                 cell->name = "twl6040-vibra";
 765                 twl6040_vibra_rsrc[0].start = irq;
 766                 twl6040_vibra_rsrc[0].end = irq;
 767                 cell->resources = twl6040_vibra_rsrc;
 768                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 769                 children++;
 770         }
 771
 772         /* GPO support */
 773         cell = &twl6040->cells[children];
 774         cell->name = "twl6040-gpo";
 775         children++;
 776
 777         /* The chip is powered down so mark regmap to cache only and dirty */
 778         regcache_cache_only(twl6040->regmap, true);
 779         regcache_mark_dirty(twl6040->regmap);
 780
 781         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 782                               NULL, 0, NULL);
 783         if (ret)
 784                 goto readyirq_err;
 785
 786         return 0;
 787
 788 readyirq_err:
 789         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 790 gpio_err:
 791         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 792         return ret;
 793 }
 794
 795 static int twl6040_remove(struct i2c_client *client)
 796 {
 797         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 798
 799         if (twl6040->power_count)
 800                 twl6040_power(twl6040, 0);
 801
 802         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 803
 804         mfd_remove_devices(&client->dev);
 805
 806         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 807
 808         return 0;
 809 }
 810
 811 static const struct i2c_device_id twl6040_i2c_id[] = {
 812         { "twl6040", 0, },
 813         { "twl6041", 0, },
 814         { },
 815 };
 816 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 817
 818 static struct i2c_driver twl6040_driver = {
 819         .driver = {
 820                 .name = "twl6040",
 821         },
 822         .probe          = twl6040_probe,
 823         .remove         = twl6040_remove,
 824         .id_table       = twl6040_i2c_id,
 825 };
 826
 827 module_i2c_driver(twl6040_driver);
 828
 829 MODULE_DESCRIPTION("TWL6040 MFD");
 830 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 831 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 832 MODULE_LICENSE("GPL");