drivers/mfd/twl6040.c

   1 /*
   2  * MFD driver for TWL6040 audio device
   3  *
   4  * Authors:     Misael Lopez Cruz <[email protected]>
   5  *              Jorge Eduardo Candelaria <[email protected]>
   6  *              Peter Ujfalusi <[email protected]>
   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                 ret = clk_prepare_enable(twl6040->clk32k);
 299                 if (ret) {
 300                         twl6040->power_count = 0;
 301                         goto out;
 302                 }
 303
 304                 /* Allow writes to the chip */
 305                 regcache_cache_only(twl6040->regmap, false);
 306
 307                 if (gpio_is_valid(twl6040->audpwron)) {
 308                         /* use automatic power-up sequence */
 309                         ret = twl6040_power_up_automatic(twl6040);
 310                         if (ret) {
 311                                 clk_disable_unprepare(twl6040->clk32k);
 312                                 twl6040->power_count = 0;
 313                                 goto out;
 314                         }
 315                 } else {
 316                         /* use manual power-up sequence */
 317                         ret = twl6040_power_up_manual(twl6040);
 318                         if (ret) {
 319                                 clk_disable_unprepare(twl6040->clk32k);
 320                                 twl6040->power_count = 0;
 321                                 goto out;
 322                         }
 323                 }
 324
 325                 /* Sync with the HW */
 326                 regcache_sync(twl6040->regmap);
 327
 328                 /* Default PLL configuration after power up */
 329                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 330                 twl6040->sysclk_rate = 19200000;
 331         } else {
 332                 /* already powered-down */
 333                 if (!twl6040->power_count) {
 334                         dev_err(twl6040->dev,
 335                                 "device is already powered-off\n");
 336                         ret = -EPERM;
 337                         goto out;
 338                 }
 339
 340                 if (--twl6040->power_count)
 341                         goto out;
 342
 343                 if (gpio_is_valid(twl6040->audpwron)) {
 344                         /* use AUDPWRON line */
 345                         gpio_set_value(twl6040->audpwron, 0);
 346
 347                         /* power-down sequence latency */
 348                         usleep_range(500, 700);
 349                 } else {
 350                         /* use manual power-down sequence */
 351                         twl6040_power_down_manual(twl6040);
 352                 }
 353
 354                 /* Set regmap to cache only and mark it as dirty */
 355                 regcache_cache_only(twl6040->regmap, true);
 356                 regcache_mark_dirty(twl6040->regmap);
 357
 358                 twl6040->sysclk_rate = 0;
 359
 360                 if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
 361                         clk_disable_unprepare(twl6040->mclk);
 362                         twl6040->mclk_rate = 0;
 363                 }
 364
 365                 clk_disable_unprepare(twl6040->clk32k);
 366         }
 367
 368 out:
 369         mutex_unlock(&twl6040->mutex);
 370         return ret;
 371 }
 372 EXPORT_SYMBOL(twl6040_power);
 373
 374 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 375                     unsigned int freq_in, unsigned int freq_out)
 376 {
 377         u8 hppllctl, lppllctl;
 378         int ret = 0;
 379
 380         mutex_lock(&twl6040->mutex);
 381
 382         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 383         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 384
 385         /* Force full reconfiguration when switching between PLL */
 386         if (pll_id != twl6040->pll) {
 387                 twl6040->sysclk_rate = 0;
 388                 twl6040->mclk_rate = 0;
 389         }
 390
 391         switch (pll_id) {
 392         case TWL6040_SYSCLK_SEL_LPPLL:
 393                 /* low-power PLL divider */
 394                 /* Change the sysclk configuration only if it has been canged */
 395                 if (twl6040->sysclk_rate != freq_out) {
 396                         switch (freq_out) {
 397                         case 17640000:
 398                                 lppllctl |= TWL6040_LPLLFIN;
 399                                 break;
 400                         case 19200000:
 401                                 lppllctl &= ~TWL6040_LPLLFIN;
 402                                 break;
 403                         default:
 404                                 dev_err(twl6040->dev,
 405                                         "freq_out %d not supported\n",
 406                                         freq_out);
 407                                 ret = -EINVAL;
 408                                 goto pll_out;
 409                         }
 410                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 411                                           lppllctl);
 412                 }
 413
 414                 /* The PLL in use has not been change, we can exit */
 415                 if (twl6040->pll == pll_id)
 416                         break;
 417
 418                 switch (freq_in) {
 419                 case 32768:
 420                         lppllctl |= TWL6040_LPLLENA;
 421                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 422                                           lppllctl);
 423                         mdelay(5);
 424                         lppllctl &= ~TWL6040_HPLLSEL;
 425                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 426                                           lppllctl);
 427                         hppllctl &= ~TWL6040_HPLLENA;
 428                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 429                                           hppllctl);
 430                         break;
 431                 default:
 432                         dev_err(twl6040->dev,
 433                                 "freq_in %d not supported\n", freq_in);
 434                         ret = -EINVAL;
 435                         goto pll_out;
 436                 }
 437
 438                 clk_disable_unprepare(twl6040->mclk);
 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_rate != 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                         /* When switching to HPPLL, enable the mclk first */
 481                         if (pll_id != twl6040->pll)
 482                                 clk_prepare_enable(twl6040->mclk);
 483                         /*
 484                          * enable clock slicer to ensure input waveform is
 485                          * square
 486                          */
 487                         hppllctl |= TWL6040_HPLLSQRENA;
 488
 489                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 490                                           hppllctl);
 491                         usleep_range(500, 700);
 492                         lppllctl |= TWL6040_HPLLSEL;
 493                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 494                                           lppllctl);
 495                         lppllctl &= ~TWL6040_LPLLENA;
 496                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 497                                           lppllctl);
 498
 499                         twl6040->mclk_rate = freq_in;
 500                 }
 501                 break;
 502         default:
 503                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 504                 ret = -EINVAL;
 505                 goto pll_out;
 506         }
 507
 508         twl6040->sysclk_rate = freq_out;
 509         twl6040->pll = pll_id;
 510
 511 pll_out:
 512         mutex_unlock(&twl6040->mutex);
 513         return ret;
 514 }
 515 EXPORT_SYMBOL(twl6040_set_pll);
 516
 517 int twl6040_get_pll(struct twl6040 *twl6040)
 518 {
 519         if (twl6040->power_count)
 520                 return twl6040->pll;
 521         else
 522                 return -ENODEV;
 523 }
 524 EXPORT_SYMBOL(twl6040_get_pll);
 525
 526 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 527 {
 528         return twl6040->sysclk_rate;
 529 }
 530 EXPORT_SYMBOL(twl6040_get_sysclk);
 531
 532 /* Get the combined status of the vibra control register */
 533 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 534 {
 535         unsigned int reg;
 536         int ret;
 537         u8 status;
 538
 539         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, &reg);
 540         if (ret != 0)
 541                 return ret;
 542         status = reg;
 543
 544         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, &reg);
 545         if (ret != 0)
 546                 return ret;
 547         status |= reg;
 548
 549         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 550
 551         return status;
 552 }
 553 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 554
 555 static struct resource twl6040_vibra_rsrc[] = {
 556         {
 557                 .flags = IORESOURCE_IRQ,
 558         },
 559 };
 560
 561 static struct resource twl6040_codec_rsrc[] = {
 562         {
 563                 .flags = IORESOURCE_IRQ,
 564         },
 565 };
 566
 567 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 568 {
 569         /* Register 0 is not readable */
 570         if (!reg)
 571                 return false;
 572         return true;
 573 }
 574
 575 static bool twl6040_volatile_reg(struct device *dev, unsigned int reg)
 576 {
 577         switch (reg) {
 578         case TWL6040_REG_ASICID:
 579         case TWL6040_REG_ASICREV:
 580         case TWL6040_REG_INTID:
 581         case TWL6040_REG_LPPLLCTL:
 582         case TWL6040_REG_HPPLLCTL:
 583         case TWL6040_REG_STATUS:
 584                 return true;
 585         default:
 586                 return false;
 587         }
 588 }
 589
 590 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
 591 {
 592         switch (reg) {
 593         case TWL6040_REG_ASICID:
 594         case TWL6040_REG_ASICREV:
 595         case TWL6040_REG_STATUS:
 596                 return false;
 597         default:
 598                 return true;
 599         }
 600 }
 601
 602 static const struct regmap_config twl6040_regmap_config = {
 603         .reg_bits = 8,
 604         .val_bits = 8,
 605
 606         .reg_defaults = twl6040_defaults,
 607         .num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
 608
 609         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 610
 611         .readable_reg = twl6040_readable_reg,
 612         .volatile_reg = twl6040_volatile_reg,
 613         .writeable_reg = twl6040_writeable_reg,
 614
 615         .cache_type = REGCACHE_RBTREE,
 616         .use_single_rw = true,
 617 };
 618
 619 static const struct regmap_irq twl6040_irqs[] = {
 620         { .reg_offset = 0, .mask = TWL6040_THINT, },
 621         { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
 622         { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
 623         { .reg_offset = 0, .mask = TWL6040_HFINT, },
 624         { .reg_offset = 0, .mask = TWL6040_VIBINT, },
 625         { .reg_offset = 0, .mask = TWL6040_READYINT, },
 626 };
 627
 628 static struct regmap_irq_chip twl6040_irq_chip = {
 629         .name = "twl6040",
 630         .irqs = twl6040_irqs,
 631         .num_irqs = ARRAY_SIZE(twl6040_irqs),
 632
 633         .num_regs = 1,
 634         .status_base = TWL6040_REG_INTID,
 635         .mask_base = TWL6040_REG_INTMR,
 636 };
 637
 638 static int twl6040_probe(struct i2c_client *client,
 639                          const struct i2c_device_id *id)
 640 {
 641         struct device_node *node = client->dev.of_node;
 642         struct twl6040 *twl6040;
 643         struct mfd_cell *cell = NULL;
 644         int irq, ret, children = 0;
 645
 646         if (!node) {
 647                 dev_err(&client->dev, "of node is missing\n");
 648                 return -EINVAL;
 649         }
 650
 651         /* In order to operate correctly we need valid interrupt config */
 652         if (!client->irq) {
 653                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 654                 return -EINVAL;
 655         }
 656
 657         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 658                                GFP_KERNEL);
 659         if (!twl6040)
 660                 return -ENOMEM;
 661
 662         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 663         if (IS_ERR(twl6040->regmap))
 664                 return PTR_ERR(twl6040->regmap);
 665
 666         i2c_set_clientdata(client, twl6040);
 667
 668         twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
 669         if (IS_ERR(twl6040->clk32k)) {
 670                 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
 671                         return -EPROBE_DEFER;
 672                 dev_dbg(&client->dev, "clk32k is not handled\n");
 673                 twl6040->clk32k = NULL;
 674         }
 675
 676         twl6040->mclk = devm_clk_get(&client->dev, "mclk");
 677         if (IS_ERR(twl6040->mclk)) {
 678                 if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
 679                         return -EPROBE_DEFER;
 680                 dev_dbg(&client->dev, "mclk is not handled\n");
 681                 twl6040->mclk = NULL;
 682         }
 683
 684         twl6040->supplies[0].supply = "vio";
 685         twl6040->supplies[1].supply = "v2v1";
 686         ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 687                                       twl6040->supplies);
 688         if (ret != 0) {
 689                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 690                 return ret;
 691         }
 692
 693         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 694         if (ret != 0) {
 695                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 696                 return ret;
 697         }
 698
 699         twl6040->dev = &client->dev;
 700         twl6040->irq = client->irq;
 701
 702         mutex_init(&twl6040->mutex);
 703         init_completion(&twl6040->ready);
 704
 705         regmap_register_patch(twl6040->regmap, twl6040_patch,
 706                               ARRAY_SIZE(twl6040_patch));
 707
 708         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 709         if (twl6040->rev < 0) {
 710                 dev_err(&client->dev, "Failed to read revision register: %d\n",
 711                         twl6040->rev);
 712                 ret = twl6040->rev;
 713                 goto gpio_err;
 714         }
 715
 716         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 717         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
 718                 twl6040->audpwron = of_get_named_gpio(node,
 719                                                       "ti,audpwron-gpio", 0);
 720         else
 721                 twl6040->audpwron = -EINVAL;
 722
 723         if (gpio_is_valid(twl6040->audpwron)) {
 724                 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
 725                                             GPIOF_OUT_INIT_LOW, "audpwron");
 726                 if (ret)
 727                         goto gpio_err;
 728
 729                 /* Clear any pending interrupt */
 730                 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 731         }
 732
 733         ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
 734                                   0, &twl6040_irq_chip, &twl6040->irq_data);
 735         if (ret < 0)
 736                 goto gpio_err;
 737
 738         twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
 739                                                  TWL6040_IRQ_READY);
 740         twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
 741                                               TWL6040_IRQ_TH);
 742
 743         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
 744                                         twl6040_readyint_handler, IRQF_ONESHOT,
 745                                         "twl6040_irq_ready", twl6040);
 746         if (ret) {
 747                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
 748                 goto readyirq_err;
 749         }
 750
 751         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
 752                                         twl6040_thint_handler, IRQF_ONESHOT,
 753                                         "twl6040_irq_th", twl6040);
 754         if (ret) {
 755                 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
 756                 goto readyirq_err;
 757         }
 758
 759         /*
 760          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 761          * We can add the ASoC codec child whenever this driver has been loaded.
 762          */
 763         irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
 764         cell = &twl6040->cells[children];
 765         cell->name = "twl6040-codec";
 766         twl6040_codec_rsrc[0].start = irq;
 767         twl6040_codec_rsrc[0].end = irq;
 768         cell->resources = twl6040_codec_rsrc;
 769         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 770         children++;
 771
 772         /* Vibra input driver support */
 773         if (twl6040_has_vibra(node)) {
 774                 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
 775
 776                 cell = &twl6040->cells[children];
 777                 cell->name = "twl6040-vibra";
 778                 twl6040_vibra_rsrc[0].start = irq;
 779                 twl6040_vibra_rsrc[0].end = irq;
 780                 cell->resources = twl6040_vibra_rsrc;
 781                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 782                 children++;
 783         }
 784
 785         /* GPO support */
 786         cell = &twl6040->cells[children];
 787         cell->name = "twl6040-gpo";
 788         children++;
 789
 790         /* PDM clock support  */
 791         cell = &twl6040->cells[children];
 792         cell->name = "twl6040-pdmclk";
 793         children++;
 794
 795         /* The chip is powered down so mark regmap to cache only and dirty */
 796         regcache_cache_only(twl6040->regmap, true);
 797         regcache_mark_dirty(twl6040->regmap);
 798
 799         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 800                               NULL, 0, NULL);
 801         if (ret)
 802                 goto readyirq_err;
 803
 804         return 0;
 805
 806 readyirq_err:
 807         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 808 gpio_err:
 809         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 810         return ret;
 811 }
 812
 813 static int twl6040_remove(struct i2c_client *client)
 814 {
 815         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 816
 817         if (twl6040->power_count)
 818                 twl6040_power(twl6040, 0);
 819
 820         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 821
 822         mfd_remove_devices(&client->dev);
 823
 824         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 825
 826         return 0;
 827 }
 828
 829 static const struct i2c_device_id twl6040_i2c_id[] = {
 830         { "twl6040", 0, },
 831         { "twl6041", 0, },
 832         { },
 833 };
 834 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 835
 836 static struct i2c_driver twl6040_driver = {
 837         .driver = {
 838                 .name = "twl6040",
 839         },
 840         .probe          = twl6040_probe,
 841         .remove         = twl6040_remove,
 842         .id_table       = twl6040_i2c_id,
 843 };
 844
 845 module_i2c_driver(twl6040_driver);
 846
 847 MODULE_DESCRIPTION("TWL6040 MFD");
 848 MODULE_AUTHOR("Misael Lopez Cruz <[email protected]>");
 849 MODULE_AUTHOR("Jorge Eduardo Candelaria <[email protected]>");
 850 MODULE_LICENSE("GPL");