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 = 19200000;
 327                 twl6040->mclk = 32768;
 328         } else {
 329                 /* already powered-down */
 330                 if (!twl6040->power_count) {
 331                         dev_err(twl6040->dev,
 332                                 "device is already powered-off\n");
 333                         ret = -EPERM;
 334                         goto out;
 335                 }
 336
 337                 if (--twl6040->power_count)
 338                         goto out;
 339
 340                 if (gpio_is_valid(twl6040->audpwron)) {
 341                         /* use AUDPWRON line */
 342                         gpio_set_value(twl6040->audpwron, 0);
 343
 344                         /* power-down sequence latency */
 345                         usleep_range(500, 700);
 346                 } else {
 347                         /* use manual power-down sequence */
 348                         twl6040_power_down_manual(twl6040);
 349                 }
 350
 351                 /* Set regmap to cache only and mark it as dirty */
 352                 regcache_cache_only(twl6040->regmap, true);
 353                 regcache_mark_dirty(twl6040->regmap);
 354
 355                 twl6040->sysclk = 0;
 356                 twl6040->mclk = 0;
 357
 358                 clk_disable_unprepare(twl6040->clk32k);
 359         }
 360
 361 out:
 362         mutex_unlock(&twl6040->mutex);
 363         return ret;
 364 }
 365 EXPORT_SYMBOL(twl6040_power);
 366
 367 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 368                     unsigned int freq_in, unsigned int freq_out)
 369 {
 370         u8 hppllctl, lppllctl;
 371         int ret = 0;
 372
 373         mutex_lock(&twl6040->mutex);
 374
 375         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 376         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 377
 378         /* Force full reconfiguration when switching between PLL */
 379         if (pll_id != twl6040->pll) {
 380                 twl6040->sysclk = 0;
 381                 twl6040->mclk = 0;
 382         }
 383
 384         switch (pll_id) {
 385         case TWL6040_SYSCLK_SEL_LPPLL:
 386                 /* low-power PLL divider */
 387                 /* Change the sysclk configuration only if it has been canged */
 388                 if (twl6040->sysclk != freq_out) {
 389                         switch (freq_out) {
 390                         case 17640000:
 391                                 lppllctl |= TWL6040_LPLLFIN;
 392                                 break;
 393                         case 19200000:
 394                                 lppllctl &= ~TWL6040_LPLLFIN;
 395                                 break;
 396                         default:
 397                                 dev_err(twl6040->dev,
 398                                         "freq_out %d not supported\n",
 399                                         freq_out);
 400                                 ret = -EINVAL;
 401                                 goto pll_out;
 402                         }
 403                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 404                                           lppllctl);
 405                 }
 406
 407                 /* The PLL in use has not been change, we can exit */
 408                 if (twl6040->pll == pll_id)
 409                         break;
 410
 411                 switch (freq_in) {
 412                 case 32768:
 413                         lppllctl |= TWL6040_LPLLENA;
 414                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 415                                           lppllctl);
 416                         mdelay(5);
 417                         lppllctl &= ~TWL6040_HPLLSEL;
 418                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 419                                           lppllctl);
 420                         hppllctl &= ~TWL6040_HPLLENA;
 421                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 422                                           hppllctl);
 423                         break;
 424                 default:
 425                         dev_err(twl6040->dev,
 426                                 "freq_in %d not supported\n", freq_in);
 427                         ret = -EINVAL;
 428                         goto pll_out;
 429                 }
 430                 break;
 431         case TWL6040_SYSCLK_SEL_HPPLL:
 432                 /* high-performance PLL can provide only 19.2 MHz */
 433                 if (freq_out != 19200000) {
 434                         dev_err(twl6040->dev,
 435                                 "freq_out %d not supported\n", freq_out);
 436                         ret = -EINVAL;
 437                         goto pll_out;
 438                 }
 439
 440                 if (twl6040->mclk != freq_in) {
 441                         hppllctl &= ~TWL6040_MCLK_MSK;
 442
 443                         switch (freq_in) {
 444                         case 12000000:
 445                                 /* PLL enabled, active mode */
 446                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 447                                             TWL6040_HPLLENA;
 448                                 break;
 449                         case 19200000:
 450                                 /* PLL enabled, bypass mode */
 451                                 hppllctl |= TWL6040_MCLK_19200KHZ |
 452                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 453                                 break;
 454                         case 26000000:
 455                                 /* PLL enabled, active mode */
 456                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 457                                             TWL6040_HPLLENA;
 458                                 break;
 459                         case 38400000:
 460                                 /* PLL enabled, bypass mode */
 461                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 462                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 463                                 break;
 464                         default:
 465                                 dev_err(twl6040->dev,
 466                                         "freq_in %d not supported\n", freq_in);
 467                                 ret = -EINVAL;
 468                                 goto pll_out;
 469                         }
 470
 471                         /*
 472                          * enable clock slicer to ensure input waveform is
 473                          * square
 474                          */
 475                         hppllctl |= TWL6040_HPLLSQRENA;
 476
 477                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 478                                           hppllctl);
 479                         usleep_range(500, 700);
 480                         lppllctl |= TWL6040_HPLLSEL;
 481                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 482                                           lppllctl);
 483                         lppllctl &= ~TWL6040_LPLLENA;
 484                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 485                                           lppllctl);
 486                 }
 487                 break;
 488         default:
 489                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 490                 ret = -EINVAL;
 491                 goto pll_out;
 492         }
 493
 494         twl6040->sysclk = freq_out;
 495         twl6040->mclk = freq_in;
 496         twl6040->pll = pll_id;
 497
 498 pll_out:
 499         mutex_unlock(&twl6040->mutex);
 500         return ret;
 501 }
 502 EXPORT_SYMBOL(twl6040_set_pll);
 503
 504 int twl6040_get_pll(struct twl6040 *twl6040)
 505 {
 506         if (twl6040->power_count)
 507                 return twl6040->pll;
 508         else
 509                 return -ENODEV;
 510 }
 511 EXPORT_SYMBOL(twl6040_get_pll);
 512
 513 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 514 {
 515         return twl6040->sysclk;
 516 }
 517 EXPORT_SYMBOL(twl6040_get_sysclk);
 518
 519 /* Get the combined status of the vibra control register */
 520 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 521 {
 522         unsigned int reg;
 523         int ret;
 524         u8 status;
 525
 526         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, &reg);
 527         if (ret != 0)
 528                 return ret;
 529         status = reg;
 530
 531         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, &reg);
 532         if (ret != 0)
 533                 return ret;
 534         status |= reg;
 535
 536         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 537
 538         return status;
 539 }
 540 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 541
 542 static struct resource twl6040_vibra_rsrc[] = {
 543         {
 544                 .flags = IORESOURCE_IRQ,
 545         },
 546 };
 547
 548 static struct resource twl6040_codec_rsrc[] = {
 549         {
 550                 .flags = IORESOURCE_IRQ,
 551         },
 552 };
 553
 554 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 555 {
 556         /* Register 0 is not readable */
 557         if (!reg)
 558                 return false;
 559         return true;
 560 }
 561
 562 static bool twl6040_volatile_reg(struct device *dev, unsigned int reg)
 563 {
 564         switch (reg) {
 565         case TWL6040_REG_ASICID:
 566         case TWL6040_REG_ASICREV:
 567         case TWL6040_REG_INTID:
 568         case TWL6040_REG_LPPLLCTL:
 569         case TWL6040_REG_HPPLLCTL:
 570         case TWL6040_REG_STATUS:
 571                 return true;
 572         default:
 573                 return false;
 574         }
 575 }
 576
 577 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
 578 {
 579         switch (reg) {
 580         case TWL6040_REG_ASICID:
 581         case TWL6040_REG_ASICREV:
 582         case TWL6040_REG_STATUS:
 583                 return false;
 584         default:
 585                 return true;
 586         }
 587 }
 588
 589 static const struct regmap_config twl6040_regmap_config = {
 590         .reg_bits = 8,
 591         .val_bits = 8,
 592
 593         .reg_defaults = twl6040_defaults,
 594         .num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
 595
 596         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 597
 598         .readable_reg = twl6040_readable_reg,
 599         .volatile_reg = twl6040_volatile_reg,
 600         .writeable_reg = twl6040_writeable_reg,
 601
 602         .cache_type = REGCACHE_RBTREE,
 603 };
 604
 605 static const struct regmap_irq twl6040_irqs[] = {
 606         { .reg_offset = 0, .mask = TWL6040_THINT, },
 607         { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
 608         { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
 609         { .reg_offset = 0, .mask = TWL6040_HFINT, },
 610         { .reg_offset = 0, .mask = TWL6040_VIBINT, },
 611         { .reg_offset = 0, .mask = TWL6040_READYINT, },
 612 };
 613
 614 static struct regmap_irq_chip twl6040_irq_chip = {
 615         .name = "twl6040",
 616         .irqs = twl6040_irqs,
 617         .num_irqs = ARRAY_SIZE(twl6040_irqs),
 618
 619         .num_regs = 1,
 620         .status_base = TWL6040_REG_INTID,
 621         .mask_base = TWL6040_REG_INTMR,
 622 };
 623
 624 static int twl6040_probe(struct i2c_client *client,
 625                          const struct i2c_device_id *id)
 626 {
 627         struct device_node *node = client->dev.of_node;
 628         struct twl6040 *twl6040;
 629         struct mfd_cell *cell = NULL;
 630         int irq, ret, children = 0;
 631
 632         if (!node) {
 633                 dev_err(&client->dev, "of node is missing\n");
 634                 return -EINVAL;
 635         }
 636
 637         /* In order to operate correctly we need valid interrupt config */
 638         if (!client->irq) {
 639                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 640                 return -EINVAL;
 641         }
 642
 643         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 644                                GFP_KERNEL);
 645         if (!twl6040)
 646                 return -ENOMEM;
 647
 648         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 649         if (IS_ERR(twl6040->regmap))
 650                 return PTR_ERR(twl6040->regmap);
 651
 652         i2c_set_clientdata(client, twl6040);
 653
 654         twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
 655         if (IS_ERR(twl6040->clk32k)) {
 656                 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
 657                         return -EPROBE_DEFER;
 658                 dev_info(&client->dev, "clk32k is not handled\n");
 659                 twl6040->clk32k = NULL;
 660         }
 661
 662         twl6040->supplies[0].supply = "vio";
 663         twl6040->supplies[1].supply = "v2v1";
 664         ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 665                                       twl6040->supplies);
 666         if (ret != 0) {
 667                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 668                 return ret;
 669         }
 670
 671         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 672         if (ret != 0) {
 673                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 674                 return ret;
 675         }
 676
 677         twl6040->dev = &client->dev;
 678         twl6040->irq = client->irq;
 679
 680         mutex_init(&twl6040->mutex);
 681         init_completion(&twl6040->ready);
 682
 683         regmap_register_patch(twl6040->regmap, twl6040_patch,
 684                               ARRAY_SIZE(twl6040_patch));
 685
 686         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 687         if (twl6040->rev < 0) {
 688                 dev_err(&client->dev, "Failed to read revision register: %d\n",
 689                         twl6040->rev);
 690                 ret = twl6040->rev;
 691                 goto gpio_err;
 692         }
 693
 694         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 695         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
 696                 twl6040->audpwron = of_get_named_gpio(node,
 697                                                       "ti,audpwron-gpio", 0);
 698         else
 699                 twl6040->audpwron = -EINVAL;
 700
 701         if (gpio_is_valid(twl6040->audpwron)) {
 702                 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
 703                                             GPIOF_OUT_INIT_LOW, "audpwron");
 704                 if (ret)
 705                         goto gpio_err;
 706
 707                 /* Clear any pending interrupt */
 708                 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 709         }
 710
 711         ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
 712                                   0, &twl6040_irq_chip, &twl6040->irq_data);
 713         if (ret < 0)
 714                 goto gpio_err;
 715
 716         twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
 717                                                  TWL6040_IRQ_READY);
 718         twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
 719                                               TWL6040_IRQ_TH);
 720
 721         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
 722                                         twl6040_readyint_handler, IRQF_ONESHOT,
 723                                         "twl6040_irq_ready", twl6040);
 724         if (ret) {
 725                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
 726                 goto readyirq_err;
 727         }
 728
 729         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
 730                                         twl6040_thint_handler, IRQF_ONESHOT,
 731                                         "twl6040_irq_th", twl6040);
 732         if (ret) {
 733                 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
 734                 goto readyirq_err;
 735         }
 736
 737         /*
 738          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 739          * We can add the ASoC codec child whenever this driver has been loaded.
 740          */
 741         irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
 742         cell = &twl6040->cells[children];
 743         cell->name = "twl6040-codec";
 744         twl6040_codec_rsrc[0].start = irq;
 745         twl6040_codec_rsrc[0].end = irq;
 746         cell->resources = twl6040_codec_rsrc;
 747         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 748         children++;
 749
 750         /* Vibra input driver support */
 751         if (twl6040_has_vibra(node)) {
 752                 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
 753
 754                 cell = &twl6040->cells[children];
 755                 cell->name = "twl6040-vibra";
 756                 twl6040_vibra_rsrc[0].start = irq;
 757                 twl6040_vibra_rsrc[0].end = irq;
 758                 cell->resources = twl6040_vibra_rsrc;
 759                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 760                 children++;
 761         }
 762
 763         /* GPO support */
 764         cell = &twl6040->cells[children];
 765         cell->name = "twl6040-gpo";
 766         children++;
 767
 768         /* The chip is powered down so mark regmap to cache only and dirty */
 769         regcache_cache_only(twl6040->regmap, true);
 770         regcache_mark_dirty(twl6040->regmap);
 771
 772         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 773                               NULL, 0, NULL);
 774         if (ret)
 775                 goto readyirq_err;
 776
 777         return 0;
 778
 779 readyirq_err:
 780         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 781 gpio_err:
 782         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 783         return ret;
 784 }
 785
 786 static int twl6040_remove(struct i2c_client *client)
 787 {
 788         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 789
 790         if (twl6040->power_count)
 791                 twl6040_power(twl6040, 0);
 792
 793         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 794
 795         mfd_remove_devices(&client->dev);
 796
 797         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 798
 799         return 0;
 800 }
 801
 802 static const struct i2c_device_id twl6040_i2c_id[] = {
 803         { "twl6040", 0, },
 804         { "twl6041", 0, },
 805         { },
 806 };
 807 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 808
 809 static struct i2c_driver twl6040_driver = {
 810         .driver = {
 811                 .name = "twl6040",
 812         },
 813         .probe          = twl6040_probe,
 814         .remove         = twl6040_remove,
 815         .id_table       = twl6040_i2c_id,
 816 };
 817
 818 module_i2c_driver(twl6040_driver);
 819
 820 MODULE_DESCRIPTION("TWL6040 MFD");
 821 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 822 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 823 MODULE_LICENSE("GPL");