drivers/mfd/twl6040.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * MFD driver for TWL6040 audio device
   4  *
   5  * Authors:     Misael Lopez Cruz <misael.lopez@ti.com>
   6  *              Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
   7  *              Peter Ujfalusi <peter.ujfalusi@ti.com>
   8  *
   9  * Copyright:   (C) 2011 Texas Instruments, Inc.
  10  */
  11
  12 #include <linux/module.h>
  13 #include <linux/types.h>
  14 #include <linux/slab.h>
  15 #include <linux/kernel.h>
  16 #include <linux/err.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/of.h>
  19 #include <linux/of_irq.h>
  20 #include <linux/of_platform.h>
  21 #include <linux/gpio/consumer.h>
  22 #include <linux/delay.h>
  23 #include <linux/i2c.h>
  24 #include <linux/regmap.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/mfd/twl6040.h>
  27 #include <linux/regulator/consumer.h>
  28
  29 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
  30 #define TWL6040_NUM_SUPPLIES    (2)
  31
  32 static const struct reg_default twl6040_defaults[] = {
  33         { 0x01, 0x4B }, /* REG_ASICID   (ro) */
  34         { 0x02, 0x00 }, /* REG_ASICREV  (ro) */
  35         { 0x03, 0x00 }, /* REG_INTID    */
  36         { 0x04, 0x00 }, /* REG_INTMR    */
  37         { 0x05, 0x00 }, /* REG_NCPCTRL  */
  38         { 0x06, 0x00 }, /* REG_LDOCTL   */
  39         { 0x07, 0x60 }, /* REG_HPPLLCTL */
  40         { 0x08, 0x00 }, /* REG_LPPLLCTL */
  41         { 0x09, 0x4A }, /* REG_LPPLLDIV */
  42         { 0x0A, 0x00 }, /* REG_AMICBCTL */
  43         { 0x0B, 0x00 }, /* REG_DMICBCTL */
  44         { 0x0C, 0x00 }, /* REG_MICLCTL  */
  45         { 0x0D, 0x00 }, /* REG_MICRCTL  */
  46         { 0x0E, 0x00 }, /* REG_MICGAIN  */
  47         { 0x0F, 0x1B }, /* REG_LINEGAIN */
  48         { 0x10, 0x00 }, /* REG_HSLCTL   */
  49         { 0x11, 0x00 }, /* REG_HSRCTL   */
  50         { 0x12, 0x00 }, /* REG_HSGAIN   */
  51         { 0x13, 0x00 }, /* REG_EARCTL   */
  52         { 0x14, 0x00 }, /* REG_HFLCTL   */
  53         { 0x15, 0x00 }, /* REG_HFLGAIN  */
  54         { 0x16, 0x00 }, /* REG_HFRCTL   */
  55         { 0x17, 0x00 }, /* REG_HFRGAIN  */
  56         { 0x18, 0x00 }, /* REG_VIBCTLL  */
  57         { 0x19, 0x00 }, /* REG_VIBDATL  */
  58         { 0x1A, 0x00 }, /* REG_VIBCTLR  */
  59         { 0x1B, 0x00 }, /* REG_VIBDATR  */
  60         { 0x1C, 0x00 }, /* REG_HKCTL1   */
  61         { 0x1D, 0x00 }, /* REG_HKCTL2   */
  62         { 0x1E, 0x00 }, /* REG_GPOCTL   */
  63         { 0x1F, 0x00 }, /* REG_ALB      */
  64         { 0x20, 0x00 }, /* REG_DLB      */
  65         /* 0x28, REG_TRIM1 */
  66         /* 0x29, REG_TRIM2 */
  67         /* 0x2A, REG_TRIM3 */
  68         /* 0x2B, REG_HSOTRIM */
  69         /* 0x2C, REG_HFOTRIM */
  70         { 0x2D, 0x08 }, /* REG_ACCCTL   */
  71         { 0x2E, 0x00 }, /* REG_STATUS   (ro) */
  72 };
  73
  74 static struct reg_sequence twl6040_patch[] = {
  75         /*
  76          * Select I2C bus access to dual access registers
  77          * Interrupt register is cleared on read
  78          * Select fast mode for i2c (400KHz)
  79          */
  80         { TWL6040_REG_ACCCTL,
  81                 TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
  82 };
  83
  84
  85 static bool twl6040_has_vibra(struct device_node *parent)
  86 {
  87         struct device_node *node;
  88
  89         node = of_get_child_by_name(parent, "vibra");
  90         if (node) {
  91                 of_node_put(node);
  92                 return true;
  93         }
  94
  95         return false;
  96 }
  97
  98 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
  99 {
 100         int ret;
 101         unsigned int val;
 102
 103         ret = regmap_read(twl6040->regmap, reg, &val);
 104         if (ret < 0)
 105                 return ret;
 106
 107         return val;
 108 }
 109 EXPORT_SYMBOL(twl6040_reg_read);
 110
 111 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
 112 {
 113         int ret;
 114
 115         ret = regmap_write(twl6040->regmap, reg, val);
 116
 117         return ret;
 118 }
 119 EXPORT_SYMBOL(twl6040_reg_write);
 120
 121 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 122 {
 123         return regmap_update_bits(twl6040->regmap, reg, mask, mask);
 124 }
 125 EXPORT_SYMBOL(twl6040_set_bits);
 126
 127 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 128 {
 129         return regmap_update_bits(twl6040->regmap, reg, mask, 0);
 130 }
 131 EXPORT_SYMBOL(twl6040_clear_bits);
 132
 133 /* twl6040 codec manual power-up sequence */
 134 static int twl6040_power_up_manual(struct twl6040 *twl6040)
 135 {
 136         u8 ldoctl, ncpctl, lppllctl;
 137         int ret;
 138
 139         /* enable high-side LDO, reference system and internal oscillator */
 140         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 141         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 142         if (ret)
 143                 return ret;
 144         usleep_range(10000, 10500);
 145
 146         /* enable negative charge pump */
 147         ncpctl = TWL6040_NCPENA;
 148         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 149         if (ret)
 150                 goto ncp_err;
 151         usleep_range(1000, 1500);
 152
 153         /* enable low-side LDO */
 154         ldoctl |= TWL6040_LSLDOENA;
 155         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 156         if (ret)
 157                 goto lsldo_err;
 158         usleep_range(1000, 1500);
 159
 160         /* enable low-power PLL */
 161         lppllctl = TWL6040_LPLLENA;
 162         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 163         if (ret)
 164                 goto lppll_err;
 165         usleep_range(5000, 5500);
 166
 167         /* disable internal oscillator */
 168         ldoctl &= ~TWL6040_OSCENA;
 169         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 170         if (ret)
 171                 goto osc_err;
 172
 173         return 0;
 174
 175 osc_err:
 176         lppllctl &= ~TWL6040_LPLLENA;
 177         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 178 lppll_err:
 179         ldoctl &= ~TWL6040_LSLDOENA;
 180         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 181 lsldo_err:
 182         ncpctl &= ~TWL6040_NCPENA;
 183         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 184 ncp_err:
 185         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 186         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 187
 188         dev_err(twl6040->dev, "manual power-up failed\n");
 189         return ret;
 190 }
 191
 192 /* twl6040 manual power-down sequence */
 193 static void twl6040_power_down_manual(struct twl6040 *twl6040)
 194 {
 195         u8 ncpctl, ldoctl, lppllctl;
 196
 197         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 198         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 199         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 200
 201         /* enable internal oscillator */
 202         ldoctl |= TWL6040_OSCENA;
 203         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 204         usleep_range(1000, 1500);
 205
 206         /* disable low-power PLL */
 207         lppllctl &= ~TWL6040_LPLLENA;
 208         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 209
 210         /* disable low-side LDO */
 211         ldoctl &= ~TWL6040_LSLDOENA;
 212         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 213
 214         /* disable negative charge pump */
 215         ncpctl &= ~TWL6040_NCPENA;
 216         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 217
 218         /* disable high-side LDO, reference system and internal oscillator */
 219         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 220         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 221 }
 222
 223 static irqreturn_t twl6040_readyint_handler(int irq, void *data)
 224 {
 225         struct twl6040 *twl6040 = data;
 226
 227         complete(&twl6040->ready);
 228
 229         return IRQ_HANDLED;
 230 }
 231
 232 static irqreturn_t twl6040_thint_handler(int irq, void *data)
 233 {
 234         struct twl6040 *twl6040 = data;
 235         u8 status;
 236
 237         status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 238         if (status & TWL6040_TSHUTDET) {
 239                 dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
 240                 twl6040_power(twl6040, 0);
 241         } else {
 242                 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
 243                 twl6040_power(twl6040, 1);
 244         }
 245
 246         return IRQ_HANDLED;
 247 }
 248
 249 static int twl6040_power_up_automatic(struct twl6040 *twl6040)
 250 {
 251         int time_left;
 252
 253         gpiod_set_value_cansleep(twl6040->audpwron, 1);
 254
 255         time_left = wait_for_completion_timeout(&twl6040->ready,
 256                                                 msecs_to_jiffies(144));
 257         if (!time_left) {
 258                 u8 intid;
 259
 260                 dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
 261                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 262                 if (!(intid & TWL6040_READYINT)) {
 263                         dev_err(twl6040->dev, "automatic power-up failed\n");
 264                         gpiod_set_value_cansleep(twl6040->audpwron, 0);
 265                         return -ETIMEDOUT;
 266                 }
 267         }
 268
 269         return 0;
 270 }
 271
 272 int twl6040_power(struct twl6040 *twl6040, int on)
 273 {
 274         int ret = 0;
 275
 276         mutex_lock(&twl6040->mutex);
 277
 278         if (on) {
 279                 /* already powered-up */
 280                 if (twl6040->power_count++)
 281                         goto out;
 282
 283                 ret = clk_prepare_enable(twl6040->clk32k);
 284                 if (ret) {
 285                         twl6040->power_count = 0;
 286                         goto out;
 287                 }
 288
 289                 /* Allow writes to the chip */
 290                 regcache_cache_only(twl6040->regmap, false);
 291
 292                 if (twl6040->audpwron) {
 293                         /* use automatic power-up sequence */
 294                         ret = twl6040_power_up_automatic(twl6040);
 295                         if (ret) {
 296                                 clk_disable_unprepare(twl6040->clk32k);
 297                                 twl6040->power_count = 0;
 298                                 goto out;
 299                         }
 300                 } else {
 301                         /* use manual power-up sequence */
 302                         ret = twl6040_power_up_manual(twl6040);
 303                         if (ret) {
 304                                 clk_disable_unprepare(twl6040->clk32k);
 305                                 twl6040->power_count = 0;
 306                                 goto out;
 307                         }
 308                 }
 309
 310                 /*
 311                  * Register access can produce errors after power-up unless we
 312                  * wait at least 8ms based on measurements on duovero.
 313                  */
 314                 usleep_range(10000, 12000);
 315
 316                 /* Sync with the HW */
 317                 ret = regcache_sync(twl6040->regmap);
 318                 if (ret) {
 319                         dev_err(twl6040->dev, "Failed to sync with the HW: %i\n",
 320                                 ret);
 321                         goto out;
 322                 }
 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 (twl6040->audpwron) {
 340                         /* use AUDPWRON line */
 341                         gpiod_set_value_cansleep(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_MAPLE,
 612         .use_single_read = true,
 613         .use_single_write = true,
 614 };
 615
 616 static const struct regmap_irq twl6040_irqs[] = {
 617         { .reg_offset = 0, .mask = TWL6040_THINT, },
 618         { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
 619         { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
 620         { .reg_offset = 0, .mask = TWL6040_HFINT, },
 621         { .reg_offset = 0, .mask = TWL6040_VIBINT, },
 622         { .reg_offset = 0, .mask = TWL6040_READYINT, },
 623 };
 624
 625 static struct regmap_irq_chip twl6040_irq_chip = {
 626         .name = "twl6040",
 627         .irqs = twl6040_irqs,
 628         .num_irqs = ARRAY_SIZE(twl6040_irqs),
 629
 630         .num_regs = 1,
 631         .status_base = TWL6040_REG_INTID,
 632         .mask_base = TWL6040_REG_INTMR,
 633 };
 634
 635 static int twl6040_probe(struct i2c_client *client)
 636 {
 637         struct device_node *node = client->dev.of_node;
 638         struct twl6040 *twl6040;
 639         struct mfd_cell *cell = NULL;
 640         int irq, ret, children = 0;
 641
 642         if (!node) {
 643                 dev_err(&client->dev, "of node is missing\n");
 644                 return -EINVAL;
 645         }
 646
 647         /* In order to operate correctly we need valid interrupt config */
 648         if (!client->irq) {
 649                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 650                 return -EINVAL;
 651         }
 652
 653         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 654                                GFP_KERNEL);
 655         if (!twl6040)
 656                 return -ENOMEM;
 657
 658         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 659         if (IS_ERR(twl6040->regmap))
 660                 return PTR_ERR(twl6040->regmap);
 661
 662         i2c_set_clientdata(client, twl6040);
 663
 664         twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
 665         if (IS_ERR(twl6040->clk32k)) {
 666                 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
 667                         return -EPROBE_DEFER;
 668                 dev_dbg(&client->dev, "clk32k is not handled\n");
 669                 twl6040->clk32k = NULL;
 670         }
 671
 672         twl6040->mclk = devm_clk_get(&client->dev, "mclk");
 673         if (IS_ERR(twl6040->mclk)) {
 674                 if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
 675                         return -EPROBE_DEFER;
 676                 dev_dbg(&client->dev, "mclk is not handled\n");
 677                 twl6040->mclk = NULL;
 678         }
 679
 680         twl6040->supplies[0].supply = "vio";
 681         twl6040->supplies[1].supply = "v2v1";
 682         ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 683                                       twl6040->supplies);
 684         if (ret != 0) {
 685                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 686                 return ret;
 687         }
 688
 689         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 690         if (ret != 0) {
 691                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 692                 return ret;
 693         }
 694
 695         twl6040->dev = &client->dev;
 696         twl6040->irq = client->irq;
 697
 698         mutex_init(&twl6040->mutex);
 699         init_completion(&twl6040->ready);
 700
 701         regmap_register_patch(twl6040->regmap, twl6040_patch,
 702                               ARRAY_SIZE(twl6040_patch));
 703
 704         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 705         if (twl6040->rev < 0) {
 706                 dev_err(&client->dev, "Failed to read revision register: %d\n",
 707                         twl6040->rev);
 708                 ret = twl6040->rev;
 709                 goto gpio_err;
 710         }
 711
 712         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 713         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0) {
 714                 twl6040->audpwron = devm_gpiod_get_optional(&client->dev,
 715                                                             "ti,audpwron",
 716                                                             GPIOD_OUT_LOW);
 717                 ret = PTR_ERR_OR_ZERO(twl6040->audpwron);
 718                 if (ret)
 719                         goto gpio_err;
 720
 721                 gpiod_set_consumer_name(twl6040->audpwron, "audpwron");
 722
 723                 /* Clear any pending interrupt */
 724                 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 725         }
 726
 727         ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
 728                                   0, &twl6040_irq_chip, &twl6040->irq_data);
 729         if (ret < 0)
 730                 goto gpio_err;
 731
 732         twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
 733                                                  TWL6040_IRQ_READY);
 734         twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
 735                                               TWL6040_IRQ_TH);
 736
 737         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
 738                                         twl6040_readyint_handler, IRQF_ONESHOT,
 739                                         "twl6040_irq_ready", twl6040);
 740         if (ret) {
 741                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
 742                 goto readyirq_err;
 743         }
 744
 745         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
 746                                         twl6040_thint_handler, IRQF_ONESHOT,
 747                                         "twl6040_irq_th", twl6040);
 748         if (ret) {
 749                 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
 750                 goto readyirq_err;
 751         }
 752
 753         /*
 754          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 755          * We can add the ASoC codec child whenever this driver has been loaded.
 756          */
 757         irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
 758         cell = &twl6040->cells[children];
 759         cell->name = "twl6040-codec";
 760         twl6040_codec_rsrc[0].start = irq;
 761         twl6040_codec_rsrc[0].end = irq;
 762         cell->resources = twl6040_codec_rsrc;
 763         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 764         children++;
 765
 766         /* Vibra input driver support */
 767         if (twl6040_has_vibra(node)) {
 768                 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
 769
 770                 cell = &twl6040->cells[children];
 771                 cell->name = "twl6040-vibra";
 772                 twl6040_vibra_rsrc[0].start = irq;
 773                 twl6040_vibra_rsrc[0].end = irq;
 774                 cell->resources = twl6040_vibra_rsrc;
 775                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 776                 children++;
 777         }
 778
 779         /* GPO support */
 780         cell = &twl6040->cells[children];
 781         cell->name = "twl6040-gpo";
 782         children++;
 783
 784         /* PDM clock support  */
 785         cell = &twl6040->cells[children];
 786         cell->name = "twl6040-pdmclk";
 787         children++;
 788
 789         /* The chip is powered down so mark regmap to cache only and dirty */
 790         regcache_cache_only(twl6040->regmap, true);
 791         regcache_mark_dirty(twl6040->regmap);
 792
 793         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 794                               NULL, 0, NULL);
 795         if (ret)
 796                 goto readyirq_err;
 797
 798         return 0;
 799
 800 readyirq_err:
 801         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 802 gpio_err:
 803         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 804         return ret;
 805 }
 806
 807 static void twl6040_remove(struct i2c_client *client)
 808 {
 809         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 810
 811         if (twl6040->power_count)
 812                 twl6040_power(twl6040, 0);
 813
 814         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 815
 816         mfd_remove_devices(&client->dev);
 817
 818         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 819 }
 820
 821 static const struct i2c_device_id twl6040_i2c_id[] = {
 822         { "twl6040", 0, },
 823         { "twl6041", 0, },
 824         { },
 825 };
 826 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 827
 828 static struct i2c_driver twl6040_driver = {
 829         .driver = {
 830                 .name = "twl6040",
 831         },
 832         .probe          = twl6040_probe,
 833         .remove         = twl6040_remove,
 834         .id_table       = twl6040_i2c_id,
 835 };
 836
 837 module_i2c_driver(twl6040_driver);
 838
 839 MODULE_DESCRIPTION("TWL6040 MFD");
 840 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 841 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");