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 *node)
 101 {
 102 #ifdef CONFIG_OF
 103         if (of_find_node_by_name(node, "vibra"))
 104                 return true;
 105 #endif
 106         return false;
 107 }
 108
 109 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
 110 {
 111         int ret;
 112         unsigned int val;
 113
 114         ret = regmap_read(twl6040->regmap, reg, &val);
 115         if (ret < 0)
 116                 return ret;
 117
 118         return val;
 119 }
 120 EXPORT_SYMBOL(twl6040_reg_read);
 121
 122 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
 123 {
 124         int ret;
 125
 126         ret = regmap_write(twl6040->regmap, reg, val);
 127
 128         return ret;
 129 }
 130 EXPORT_SYMBOL(twl6040_reg_write);
 131
 132 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 133 {
 134         return regmap_update_bits(twl6040->regmap, reg, mask, mask);
 135 }
 136 EXPORT_SYMBOL(twl6040_set_bits);
 137
 138 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 139 {
 140         return regmap_update_bits(twl6040->regmap, reg, mask, 0);
 141 }
 142 EXPORT_SYMBOL(twl6040_clear_bits);
 143
 144 /* twl6040 codec manual power-up sequence */
 145 static int twl6040_power_up_manual(struct twl6040 *twl6040)
 146 {
 147         u8 ldoctl, ncpctl, lppllctl;
 148         int ret;
 149
 150         /* enable high-side LDO, reference system and internal oscillator */
 151         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 152         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 153         if (ret)
 154                 return ret;
 155         usleep_range(10000, 10500);
 156
 157         /* enable negative charge pump */
 158         ncpctl = TWL6040_NCPENA;
 159         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 160         if (ret)
 161                 goto ncp_err;
 162         usleep_range(1000, 1500);
 163
 164         /* enable low-side LDO */
 165         ldoctl |= TWL6040_LSLDOENA;
 166         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 167         if (ret)
 168                 goto lsldo_err;
 169         usleep_range(1000, 1500);
 170
 171         /* enable low-power PLL */
 172         lppllctl = TWL6040_LPLLENA;
 173         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 174         if (ret)
 175                 goto lppll_err;
 176         usleep_range(5000, 5500);
 177
 178         /* disable internal oscillator */
 179         ldoctl &= ~TWL6040_OSCENA;
 180         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 181         if (ret)
 182                 goto osc_err;
 183
 184         return 0;
 185
 186 osc_err:
 187         lppllctl &= ~TWL6040_LPLLENA;
 188         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 189 lppll_err:
 190         ldoctl &= ~TWL6040_LSLDOENA;
 191         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 192 lsldo_err:
 193         ncpctl &= ~TWL6040_NCPENA;
 194         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 195 ncp_err:
 196         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 197         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 198
 199         dev_err(twl6040->dev, "manual power-up failed\n");
 200         return ret;
 201 }
 202
 203 /* twl6040 manual power-down sequence */
 204 static void twl6040_power_down_manual(struct twl6040 *twl6040)
 205 {
 206         u8 ncpctl, ldoctl, lppllctl;
 207
 208         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 209         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 210         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 211
 212         /* enable internal oscillator */
 213         ldoctl |= TWL6040_OSCENA;
 214         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 215         usleep_range(1000, 1500);
 216
 217         /* disable low-power PLL */
 218         lppllctl &= ~TWL6040_LPLLENA;
 219         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 220
 221         /* disable low-side LDO */
 222         ldoctl &= ~TWL6040_LSLDOENA;
 223         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 224
 225         /* disable negative charge pump */
 226         ncpctl &= ~TWL6040_NCPENA;
 227         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 228
 229         /* disable high-side LDO, reference system and internal oscillator */
 230         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 231         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 232 }
 233
 234 static irqreturn_t twl6040_readyint_handler(int irq, void *data)
 235 {
 236         struct twl6040 *twl6040 = data;
 237
 238         complete(&twl6040->ready);
 239
 240         return IRQ_HANDLED;
 241 }
 242
 243 static irqreturn_t twl6040_thint_handler(int irq, void *data)
 244 {
 245         struct twl6040 *twl6040 = data;
 246         u8 status;
 247
 248         status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 249         if (status & TWL6040_TSHUTDET) {
 250                 dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
 251                 twl6040_power(twl6040, 0);
 252         } else {
 253                 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
 254                 twl6040_power(twl6040, 1);
 255         }
 256
 257         return IRQ_HANDLED;
 258 }
 259
 260 static int twl6040_power_up_automatic(struct twl6040 *twl6040)
 261 {
 262         int time_left;
 263
 264         gpio_set_value(twl6040->audpwron, 1);
 265
 266         time_left = wait_for_completion_timeout(&twl6040->ready,
 267                                                 msecs_to_jiffies(144));
 268         if (!time_left) {
 269                 u8 intid;
 270
 271                 dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
 272                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 273                 if (!(intid & TWL6040_READYINT)) {
 274                         dev_err(twl6040->dev, "automatic power-up failed\n");
 275                         gpio_set_value(twl6040->audpwron, 0);
 276                         return -ETIMEDOUT;
 277                 }
 278         }
 279
 280         return 0;
 281 }
 282
 283 int twl6040_power(struct twl6040 *twl6040, int on)
 284 {
 285         int ret = 0;
 286
 287         mutex_lock(&twl6040->mutex);
 288
 289         if (on) {
 290                 /* already powered-up */
 291                 if (twl6040->power_count++)
 292                         goto out;
 293
 294                 ret = clk_prepare_enable(twl6040->clk32k);
 295                 if (ret) {
 296                         twl6040->power_count = 0;
 297                         goto out;
 298                 }
 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                                 clk_disable_unprepare(twl6040->clk32k);
 308                                 twl6040->power_count = 0;
 309                                 goto out;
 310                         }
 311                 } else {
 312                         /* use manual power-up sequence */
 313                         ret = twl6040_power_up_manual(twl6040);
 314                         if (ret) {
 315                                 clk_disable_unprepare(twl6040->clk32k);
 316                                 twl6040->power_count = 0;
 317                                 goto out;
 318                         }
 319                 }
 320
 321                 /* Sync with the HW */
 322                 regcache_sync(twl6040->regmap);
 323
 324                 /* Default PLL configuration after power up */
 325                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 326                 twl6040->sysclk_rate = 19200000;
 327         } else {
 328                 /* already powered-down */
 329                 if (!twl6040->power_count) {
 330                         dev_err(twl6040->dev,
 331                                 "device is already powered-off\n");
 332                         ret = -EPERM;
 333                         goto out;
 334                 }
 335
 336                 if (--twl6040->power_count)
 337                         goto out;
 338
 339                 if (gpio_is_valid(twl6040->audpwron)) {
 340                         /* use AUDPWRON line */
 341                         gpio_set_value(twl6040->audpwron, 0);
 342
 343                         /* power-down sequence latency */
 344                         usleep_range(500, 700);
 345                 } else {
 346                         /* use manual power-down sequence */
 347                         twl6040_power_down_manual(twl6040);
 348                 }
 349
 350                 /* Set regmap to cache only and mark it as dirty */
 351                 regcache_cache_only(twl6040->regmap, true);
 352                 regcache_mark_dirty(twl6040->regmap);
 353
 354                 twl6040->sysclk_rate = 0;
 355
 356                 if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
 357                         clk_disable_unprepare(twl6040->mclk);
 358                         twl6040->mclk_rate = 0;
 359                 }
 360
 361                 clk_disable_unprepare(twl6040->clk32k);
 362         }
 363
 364 out:
 365         mutex_unlock(&twl6040->mutex);
 366         return ret;
 367 }
 368 EXPORT_SYMBOL(twl6040_power);
 369
 370 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 371                     unsigned int freq_in, unsigned int freq_out)
 372 {
 373         u8 hppllctl, lppllctl;
 374         int ret = 0;
 375
 376         mutex_lock(&twl6040->mutex);
 377
 378         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 379         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 380
 381         /* Force full reconfiguration when switching between PLL */
 382         if (pll_id != twl6040->pll) {
 383                 twl6040->sysclk_rate = 0;
 384                 twl6040->mclk_rate = 0;
 385         }
 386
 387         switch (pll_id) {
 388         case TWL6040_SYSCLK_SEL_LPPLL:
 389                 /* low-power PLL divider */
 390                 /* Change the sysclk configuration only if it has been canged */
 391                 if (twl6040->sysclk_rate != freq_out) {
 392                         switch (freq_out) {
 393                         case 17640000:
 394                                 lppllctl |= TWL6040_LPLLFIN;
 395                                 break;
 396                         case 19200000:
 397                                 lppllctl &= ~TWL6040_LPLLFIN;
 398                                 break;
 399                         default:
 400                                 dev_err(twl6040->dev,
 401                                         "freq_out %d not supported\n",
 402                                         freq_out);
 403                                 ret = -EINVAL;
 404                                 goto pll_out;
 405                         }
 406                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 407                                           lppllctl);
 408                 }
 409
 410                 /* The PLL in use has not been change, we can exit */
 411                 if (twl6040->pll == pll_id)
 412                         break;
 413
 414                 switch (freq_in) {
 415                 case 32768:
 416                         lppllctl |= TWL6040_LPLLENA;
 417                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 418                                           lppllctl);
 419                         mdelay(5);
 420                         lppllctl &= ~TWL6040_HPLLSEL;
 421                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 422                                           lppllctl);
 423                         hppllctl &= ~TWL6040_HPLLENA;
 424                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 425                                           hppllctl);
 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                 clk_disable_unprepare(twl6040->mclk);
 435                 break;
 436         case TWL6040_SYSCLK_SEL_HPPLL:
 437                 /* high-performance PLL can provide only 19.2 MHz */
 438                 if (freq_out != 19200000) {
 439                         dev_err(twl6040->dev,
 440                                 "freq_out %d not supported\n", freq_out);
 441                         ret = -EINVAL;
 442                         goto pll_out;
 443                 }
 444
 445                 if (twl6040->mclk_rate != freq_in) {
 446                         hppllctl &= ~TWL6040_MCLK_MSK;
 447
 448                         switch (freq_in) {
 449                         case 12000000:
 450                                 /* PLL enabled, active mode */
 451                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 452                                             TWL6040_HPLLENA;
 453                                 break;
 454                         case 19200000:
 455                                 /* PLL enabled, bypass mode */
 456                                 hppllctl |= TWL6040_MCLK_19200KHZ |
 457                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 458                                 break;
 459                         case 26000000:
 460                                 /* PLL enabled, active mode */
 461                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 462                                             TWL6040_HPLLENA;
 463                                 break;
 464                         case 38400000:
 465                                 /* PLL enabled, bypass mode */
 466                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 467                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 468                                 break;
 469                         default:
 470                                 dev_err(twl6040->dev,
 471                                         "freq_in %d not supported\n", freq_in);
 472                                 ret = -EINVAL;
 473                                 goto pll_out;
 474                         }
 475
 476                         /* When switching to HPPLL, enable the mclk first */
 477                         if (pll_id != twl6040->pll)
 478                                 clk_prepare_enable(twl6040->mclk);
 479                         /*
 480                          * enable clock slicer to ensure input waveform is
 481                          * square
 482                          */
 483                         hppllctl |= TWL6040_HPLLSQRENA;
 484
 485                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 486                                           hppllctl);
 487                         usleep_range(500, 700);
 488                         lppllctl |= TWL6040_HPLLSEL;
 489                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 490                                           lppllctl);
 491                         lppllctl &= ~TWL6040_LPLLENA;
 492                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 493                                           lppllctl);
 494
 495                         twl6040->mclk_rate = freq_in;
 496                 }
 497                 break;
 498         default:
 499                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 500                 ret = -EINVAL;
 501                 goto pll_out;
 502         }
 503
 504         twl6040->sysclk_rate = freq_out;
 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_rate;
 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_dbg(&client->dev, "clk32k is not handled\n");
 668                 twl6040->clk32k = NULL;
 669         }
 670
 671         twl6040->mclk = devm_clk_get(&client->dev, "mclk");
 672         if (IS_ERR(twl6040->mclk)) {
 673                 if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
 674                         return -EPROBE_DEFER;
 675                 dev_dbg(&client->dev, "mclk is not handled\n");
 676                 twl6040->mclk = NULL;
 677         }
 678
 679         twl6040->supplies[0].supply = "vio";
 680         twl6040->supplies[1].supply = "v2v1";
 681         ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 682                                       twl6040->supplies);
 683         if (ret != 0) {
 684                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 685                 return ret;
 686         }
 687
 688         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 689         if (ret != 0) {
 690                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 691                 return ret;
 692         }
 693
 694         twl6040->dev = &client->dev;
 695         twl6040->irq = client->irq;
 696
 697         mutex_init(&twl6040->mutex);
 698         init_completion(&twl6040->ready);
 699
 700         regmap_register_patch(twl6040->regmap, twl6040_patch,
 701                               ARRAY_SIZE(twl6040_patch));
 702
 703         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 704         if (twl6040->rev < 0) {
 705                 dev_err(&client->dev, "Failed to read revision register: %d\n",
 706                         twl6040->rev);
 707                 ret = twl6040->rev;
 708                 goto gpio_err;
 709         }
 710
 711         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 712         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
 713                 twl6040->audpwron = of_get_named_gpio(node,
 714                                                       "ti,audpwron-gpio", 0);
 715         else
 716                 twl6040->audpwron = -EINVAL;
 717
 718         if (gpio_is_valid(twl6040->audpwron)) {
 719                 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
 720                                             GPIOF_OUT_INIT_LOW, "audpwron");
 721                 if (ret)
 722                         goto gpio_err;
 723
 724                 /* Clear any pending interrupt */
 725                 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 726         }
 727
 728         ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
 729                                   0, &twl6040_irq_chip, &twl6040->irq_data);
 730         if (ret < 0)
 731                 goto gpio_err;
 732
 733         twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
 734                                                  TWL6040_IRQ_READY);
 735         twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
 736                                               TWL6040_IRQ_TH);
 737
 738         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
 739                                         twl6040_readyint_handler, IRQF_ONESHOT,
 740                                         "twl6040_irq_ready", twl6040);
 741         if (ret) {
 742                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
 743                 goto readyirq_err;
 744         }
 745
 746         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
 747                                         twl6040_thint_handler, IRQF_ONESHOT,
 748                                         "twl6040_irq_th", twl6040);
 749         if (ret) {
 750                 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
 751                 goto readyirq_err;
 752         }
 753
 754         /*
 755          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 756          * We can add the ASoC codec child whenever this driver has been loaded.
 757          */
 758         irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
 759         cell = &twl6040->cells[children];
 760         cell->name = "twl6040-codec";
 761         twl6040_codec_rsrc[0].start = irq;
 762         twl6040_codec_rsrc[0].end = irq;
 763         cell->resources = twl6040_codec_rsrc;
 764         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 765         children++;
 766
 767         /* Vibra input driver support */
 768         if (twl6040_has_vibra(node)) {
 769                 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
 770
 771                 cell = &twl6040->cells[children];
 772                 cell->name = "twl6040-vibra";
 773                 twl6040_vibra_rsrc[0].start = irq;
 774                 twl6040_vibra_rsrc[0].end = irq;
 775                 cell->resources = twl6040_vibra_rsrc;
 776                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 777                 children++;
 778         }
 779
 780         /* GPO support */
 781         cell = &twl6040->cells[children];
 782         cell->name = "twl6040-gpo";
 783         children++;
 784
 785         /* The chip is powered down so mark regmap to cache only and dirty */
 786         regcache_cache_only(twl6040->regmap, true);
 787         regcache_mark_dirty(twl6040->regmap);
 788
 789         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 790                               NULL, 0, NULL);
 791         if (ret)
 792                 goto readyirq_err;
 793
 794         return 0;
 795
 796 readyirq_err:
 797         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 798 gpio_err:
 799         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 800         return ret;
 801 }
 802
 803 static int twl6040_remove(struct i2c_client *client)
 804 {
 805         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 806
 807         if (twl6040->power_count)
 808                 twl6040_power(twl6040, 0);
 809
 810         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 811
 812         mfd_remove_devices(&client->dev);
 813
 814         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 815
 816         return 0;
 817 }
 818
 819 static const struct i2c_device_id twl6040_i2c_id[] = {
 820         { "twl6040", 0, },
 821         { "twl6041", 0, },
 822         { },
 823 };
 824 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 825
 826 static struct i2c_driver twl6040_driver = {
 827         .driver = {
 828                 .name = "twl6040",
 829         },
 830         .probe          = twl6040_probe,
 831         .remove         = twl6040_remove,
 832         .id_table       = twl6040_i2c_id,
 833 };
 834
 835 module_i2c_driver(twl6040_driver);
 836
 837 MODULE_DESCRIPTION("TWL6040 MFD");
 838 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 839 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 840 MODULE_LICENSE("GPL");