drivers/mfd/twl6040.c

   1 /*
   2  * MFD driver for TWL6040 audio device
   3  *
   4  * Authors:     Misael Lopez Cruz <misael.lopez@ti.com>
   5  *              Jorge Eduardo Candelaria <jorge.candelaria@ti.com>
   6  *              Peter Ujfalusi <peter.ujfalusi@ti.com>
   7  *
   8  * Copyright:   (C) 2011 Texas Instruments, Inc.
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License version 2 as
  12  * published by the Free Software Foundation.
  13  *
  14  * This program is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  22  * 02110-1301 USA
  23  *
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/types.h>
  28 #include <linux/slab.h>
  29 #include <linux/kernel.h>
  30 #include <linux/err.h>
  31 #include <linux/platform_device.h>
  32 #include <linux/of.h>
  33 #include <linux/of_irq.h>
  34 #include <linux/of_gpio.h>
  35 #include <linux/of_platform.h>
  36 #include <linux/gpio.h>
  37 #include <linux/delay.h>
  38 #include <linux/i2c.h>
  39 #include <linux/regmap.h>
  40 #include <linux/mfd/core.h>
  41 #include <linux/mfd/twl6040.h>
  42 #include <linux/regulator/consumer.h>
  43
  44 #define VIBRACTRL_MEMBER(reg) ((reg == TWL6040_REG_VIBCTLL) ? 0 : 1)
  45 #define TWL6040_NUM_SUPPLIES    (2)
  46
  47 static const struct reg_default twl6040_defaults[] = {
  48         { 0x01, 0x4B }, /* REG_ASICID   (ro) */
  49         { 0x02, 0x00 }, /* REG_ASICREV  (ro) */
  50         { 0x03, 0x00 }, /* REG_INTID    */
  51         { 0x04, 0x00 }, /* REG_INTMR    */
  52         { 0x05, 0x00 }, /* REG_NCPCTRL  */
  53         { 0x06, 0x00 }, /* REG_LDOCTL   */
  54         { 0x07, 0x60 }, /* REG_HPPLLCTL */
  55         { 0x08, 0x00 }, /* REG_LPPLLCTL */
  56         { 0x09, 0x4A }, /* REG_LPPLLDIV */
  57         { 0x0A, 0x00 }, /* REG_AMICBCTL */
  58         { 0x0B, 0x00 }, /* REG_DMICBCTL */
  59         { 0x0C, 0x00 }, /* REG_MICLCTL  */
  60         { 0x0D, 0x00 }, /* REG_MICRCTL  */
  61         { 0x0E, 0x00 }, /* REG_MICGAIN  */
  62         { 0x0F, 0x1B }, /* REG_LINEGAIN */
  63         { 0x10, 0x00 }, /* REG_HSLCTL   */
  64         { 0x11, 0x00 }, /* REG_HSRCTL   */
  65         { 0x12, 0x00 }, /* REG_HSGAIN   */
  66         { 0x13, 0x00 }, /* REG_EARCTL   */
  67         { 0x14, 0x00 }, /* REG_HFLCTL   */
  68         { 0x15, 0x00 }, /* REG_HFLGAIN  */
  69         { 0x16, 0x00 }, /* REG_HFRCTL   */
  70         { 0x17, 0x00 }, /* REG_HFRGAIN  */
  71         { 0x18, 0x00 }, /* REG_VIBCTLL  */
  72         { 0x19, 0x00 }, /* REG_VIBDATL  */
  73         { 0x1A, 0x00 }, /* REG_VIBCTLR  */
  74         { 0x1B, 0x00 }, /* REG_VIBDATR  */
  75         { 0x1C, 0x00 }, /* REG_HKCTL1   */
  76         { 0x1D, 0x00 }, /* REG_HKCTL2   */
  77         { 0x1E, 0x00 }, /* REG_GPOCTL   */
  78         { 0x1F, 0x00 }, /* REG_ALB      */
  79         { 0x20, 0x00 }, /* REG_DLB      */
  80         /* 0x28, REG_TRIM1 */
  81         /* 0x29, REG_TRIM2 */
  82         /* 0x2A, REG_TRIM3 */
  83         /* 0x2B, REG_HSOTRIM */
  84         /* 0x2C, REG_HFOTRIM */
  85         { 0x2D, 0x08 }, /* REG_ACCCTL   */
  86         { 0x2E, 0x00 }, /* REG_STATUS   (ro) */
  87 };
  88
  89 static struct reg_sequence twl6040_patch[] = {
  90         /*
  91          * Select I2C bus access to dual access registers
  92          * Interrupt register is cleared on read
  93          * Select fast mode for i2c (400KHz)
  94          */
  95         { TWL6040_REG_ACCCTL,
  96                 TWL6040_I2CSEL | TWL6040_INTCLRMODE | TWL6040_I2CMODE(1) },
  97 };
  98
  99
 100 static bool twl6040_has_vibra(struct device_node *parent)
 101 {
 102         struct device_node *node;
 103
 104         node = of_get_child_by_name(parent, "vibra");
 105         if (node) {
 106                 of_node_put(node);
 107                 return true;
 108         }
 109
 110         return false;
 111 }
 112
 113 int twl6040_reg_read(struct twl6040 *twl6040, unsigned int reg)
 114 {
 115         int ret;
 116         unsigned int val;
 117
 118         ret = regmap_read(twl6040->regmap, reg, &val);
 119         if (ret < 0)
 120                 return ret;
 121
 122         return val;
 123 }
 124 EXPORT_SYMBOL(twl6040_reg_read);
 125
 126 int twl6040_reg_write(struct twl6040 *twl6040, unsigned int reg, u8 val)
 127 {
 128         int ret;
 129
 130         ret = regmap_write(twl6040->regmap, reg, val);
 131
 132         return ret;
 133 }
 134 EXPORT_SYMBOL(twl6040_reg_write);
 135
 136 int twl6040_set_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 137 {
 138         return regmap_update_bits(twl6040->regmap, reg, mask, mask);
 139 }
 140 EXPORT_SYMBOL(twl6040_set_bits);
 141
 142 int twl6040_clear_bits(struct twl6040 *twl6040, unsigned int reg, u8 mask)
 143 {
 144         return regmap_update_bits(twl6040->regmap, reg, mask, 0);
 145 }
 146 EXPORT_SYMBOL(twl6040_clear_bits);
 147
 148 /* twl6040 codec manual power-up sequence */
 149 static int twl6040_power_up_manual(struct twl6040 *twl6040)
 150 {
 151         u8 ldoctl, ncpctl, lppllctl;
 152         int ret;
 153
 154         /* enable high-side LDO, reference system and internal oscillator */
 155         ldoctl = TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA;
 156         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 157         if (ret)
 158                 return ret;
 159         usleep_range(10000, 10500);
 160
 161         /* enable negative charge pump */
 162         ncpctl = TWL6040_NCPENA;
 163         ret = twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 164         if (ret)
 165                 goto ncp_err;
 166         usleep_range(1000, 1500);
 167
 168         /* enable low-side LDO */
 169         ldoctl |= TWL6040_LSLDOENA;
 170         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 171         if (ret)
 172                 goto lsldo_err;
 173         usleep_range(1000, 1500);
 174
 175         /* enable low-power PLL */
 176         lppllctl = TWL6040_LPLLENA;
 177         ret = twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 178         if (ret)
 179                 goto lppll_err;
 180         usleep_range(5000, 5500);
 181
 182         /* disable internal oscillator */
 183         ldoctl &= ~TWL6040_OSCENA;
 184         ret = twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 185         if (ret)
 186                 goto osc_err;
 187
 188         return 0;
 189
 190 osc_err:
 191         lppllctl &= ~TWL6040_LPLLENA;
 192         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 193 lppll_err:
 194         ldoctl &= ~TWL6040_LSLDOENA;
 195         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 196 lsldo_err:
 197         ncpctl &= ~TWL6040_NCPENA;
 198         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 199 ncp_err:
 200         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 201         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 202
 203         dev_err(twl6040->dev, "manual power-up failed\n");
 204         return ret;
 205 }
 206
 207 /* twl6040 manual power-down sequence */
 208 static void twl6040_power_down_manual(struct twl6040 *twl6040)
 209 {
 210         u8 ncpctl, ldoctl, lppllctl;
 211
 212         ncpctl = twl6040_reg_read(twl6040, TWL6040_REG_NCPCTL);
 213         ldoctl = twl6040_reg_read(twl6040, TWL6040_REG_LDOCTL);
 214         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 215
 216         /* enable internal oscillator */
 217         ldoctl |= TWL6040_OSCENA;
 218         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 219         usleep_range(1000, 1500);
 220
 221         /* disable low-power PLL */
 222         lppllctl &= ~TWL6040_LPLLENA;
 223         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL, lppllctl);
 224
 225         /* disable low-side LDO */
 226         ldoctl &= ~TWL6040_LSLDOENA;
 227         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 228
 229         /* disable negative charge pump */
 230         ncpctl &= ~TWL6040_NCPENA;
 231         twl6040_reg_write(twl6040, TWL6040_REG_NCPCTL, ncpctl);
 232
 233         /* disable high-side LDO, reference system and internal oscillator */
 234         ldoctl &= ~(TWL6040_HSLDOENA | TWL6040_REFENA | TWL6040_OSCENA);
 235         twl6040_reg_write(twl6040, TWL6040_REG_LDOCTL, ldoctl);
 236 }
 237
 238 static irqreturn_t twl6040_readyint_handler(int irq, void *data)
 239 {
 240         struct twl6040 *twl6040 = data;
 241
 242         complete(&twl6040->ready);
 243
 244         return IRQ_HANDLED;
 245 }
 246
 247 static irqreturn_t twl6040_thint_handler(int irq, void *data)
 248 {
 249         struct twl6040 *twl6040 = data;
 250         u8 status;
 251
 252         status = twl6040_reg_read(twl6040, TWL6040_REG_STATUS);
 253         if (status & TWL6040_TSHUTDET) {
 254                 dev_warn(twl6040->dev, "Thermal shutdown, powering-off");
 255                 twl6040_power(twl6040, 0);
 256         } else {
 257                 dev_warn(twl6040->dev, "Leaving thermal shutdown, powering-on");
 258                 twl6040_power(twl6040, 1);
 259         }
 260
 261         return IRQ_HANDLED;
 262 }
 263
 264 static int twl6040_power_up_automatic(struct twl6040 *twl6040)
 265 {
 266         int time_left;
 267
 268         gpio_set_value(twl6040->audpwron, 1);
 269
 270         time_left = wait_for_completion_timeout(&twl6040->ready,
 271                                                 msecs_to_jiffies(144));
 272         if (!time_left) {
 273                 u8 intid;
 274
 275                 dev_warn(twl6040->dev, "timeout waiting for READYINT\n");
 276                 intid = twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 277                 if (!(intid & TWL6040_READYINT)) {
 278                         dev_err(twl6040->dev, "automatic power-up failed\n");
 279                         gpio_set_value(twl6040->audpwron, 0);
 280                         return -ETIMEDOUT;
 281                 }
 282         }
 283
 284         return 0;
 285 }
 286
 287 int twl6040_power(struct twl6040 *twl6040, int on)
 288 {
 289         int ret = 0;
 290
 291         mutex_lock(&twl6040->mutex);
 292
 293         if (on) {
 294                 /* already powered-up */
 295                 if (twl6040->power_count++)
 296                         goto out;
 297
 298                 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                 /*
 326                  * Register access can produce errors after power-up unless we
 327                  * wait at least 8ms based on measurements on duovero.
 328                  */
 329                 usleep_range(10000, 12000);
 330
 331                 /* Sync with the HW */
 332                 ret = regcache_sync(twl6040->regmap);
 333                 if (ret) {
 334                         dev_err(twl6040->dev, "Failed to sync with the HW: %i\n",
 335                                 ret);
 336                         goto out;
 337                 }
 338
 339                 /* Default PLL configuration after power up */
 340                 twl6040->pll = TWL6040_SYSCLK_SEL_LPPLL;
 341                 twl6040->sysclk_rate = 19200000;
 342         } else {
 343                 /* already powered-down */
 344                 if (!twl6040->power_count) {
 345                         dev_err(twl6040->dev,
 346                                 "device is already powered-off\n");
 347                         ret = -EPERM;
 348                         goto out;
 349                 }
 350
 351                 if (--twl6040->power_count)
 352                         goto out;
 353
 354                 if (gpio_is_valid(twl6040->audpwron)) {
 355                         /* use AUDPWRON line */
 356                         gpio_set_value(twl6040->audpwron, 0);
 357
 358                         /* power-down sequence latency */
 359                         usleep_range(500, 700);
 360                 } else {
 361                         /* use manual power-down sequence */
 362                         twl6040_power_down_manual(twl6040);
 363                 }
 364
 365                 /* Set regmap to cache only and mark it as dirty */
 366                 regcache_cache_only(twl6040->regmap, true);
 367                 regcache_mark_dirty(twl6040->regmap);
 368
 369                 twl6040->sysclk_rate = 0;
 370
 371                 if (twl6040->pll == TWL6040_SYSCLK_SEL_HPPLL) {
 372                         clk_disable_unprepare(twl6040->mclk);
 373                         twl6040->mclk_rate = 0;
 374                 }
 375
 376                 clk_disable_unprepare(twl6040->clk32k);
 377         }
 378
 379 out:
 380         mutex_unlock(&twl6040->mutex);
 381         return ret;
 382 }
 383 EXPORT_SYMBOL(twl6040_power);
 384
 385 int twl6040_set_pll(struct twl6040 *twl6040, int pll_id,
 386                     unsigned int freq_in, unsigned int freq_out)
 387 {
 388         u8 hppllctl, lppllctl;
 389         int ret = 0;
 390
 391         mutex_lock(&twl6040->mutex);
 392
 393         hppllctl = twl6040_reg_read(twl6040, TWL6040_REG_HPPLLCTL);
 394         lppllctl = twl6040_reg_read(twl6040, TWL6040_REG_LPPLLCTL);
 395
 396         /* Force full reconfiguration when switching between PLL */
 397         if (pll_id != twl6040->pll) {
 398                 twl6040->sysclk_rate = 0;
 399                 twl6040->mclk_rate = 0;
 400         }
 401
 402         switch (pll_id) {
 403         case TWL6040_SYSCLK_SEL_LPPLL:
 404                 /* low-power PLL divider */
 405                 /* Change the sysclk configuration only if it has been canged */
 406                 if (twl6040->sysclk_rate != freq_out) {
 407                         switch (freq_out) {
 408                         case 17640000:
 409                                 lppllctl |= TWL6040_LPLLFIN;
 410                                 break;
 411                         case 19200000:
 412                                 lppllctl &= ~TWL6040_LPLLFIN;
 413                                 break;
 414                         default:
 415                                 dev_err(twl6040->dev,
 416                                         "freq_out %d not supported\n",
 417                                         freq_out);
 418                                 ret = -EINVAL;
 419                                 goto pll_out;
 420                         }
 421                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 422                                           lppllctl);
 423                 }
 424
 425                 /* The PLL in use has not been change, we can exit */
 426                 if (twl6040->pll == pll_id)
 427                         break;
 428
 429                 switch (freq_in) {
 430                 case 32768:
 431                         lppllctl |= TWL6040_LPLLENA;
 432                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 433                                           lppllctl);
 434                         mdelay(5);
 435                         lppllctl &= ~TWL6040_HPLLSEL;
 436                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 437                                           lppllctl);
 438                         hppllctl &= ~TWL6040_HPLLENA;
 439                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 440                                           hppllctl);
 441                         break;
 442                 default:
 443                         dev_err(twl6040->dev,
 444                                 "freq_in %d not supported\n", freq_in);
 445                         ret = -EINVAL;
 446                         goto pll_out;
 447                 }
 448
 449                 clk_disable_unprepare(twl6040->mclk);
 450                 break;
 451         case TWL6040_SYSCLK_SEL_HPPLL:
 452                 /* high-performance PLL can provide only 19.2 MHz */
 453                 if (freq_out != 19200000) {
 454                         dev_err(twl6040->dev,
 455                                 "freq_out %d not supported\n", freq_out);
 456                         ret = -EINVAL;
 457                         goto pll_out;
 458                 }
 459
 460                 if (twl6040->mclk_rate != freq_in) {
 461                         hppllctl &= ~TWL6040_MCLK_MSK;
 462
 463                         switch (freq_in) {
 464                         case 12000000:
 465                                 /* PLL enabled, active mode */
 466                                 hppllctl |= TWL6040_MCLK_12000KHZ |
 467                                             TWL6040_HPLLENA;
 468                                 break;
 469                         case 19200000:
 470                                 /* PLL enabled, bypass mode */
 471                                 hppllctl |= TWL6040_MCLK_19200KHZ |
 472                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 473                                 break;
 474                         case 26000000:
 475                                 /* PLL enabled, active mode */
 476                                 hppllctl |= TWL6040_MCLK_26000KHZ |
 477                                             TWL6040_HPLLENA;
 478                                 break;
 479                         case 38400000:
 480                                 /* PLL enabled, bypass mode */
 481                                 hppllctl |= TWL6040_MCLK_38400KHZ |
 482                                             TWL6040_HPLLBP | TWL6040_HPLLENA;
 483                                 break;
 484                         default:
 485                                 dev_err(twl6040->dev,
 486                                         "freq_in %d not supported\n", freq_in);
 487                                 ret = -EINVAL;
 488                                 goto pll_out;
 489                         }
 490
 491                         /* When switching to HPPLL, enable the mclk first */
 492                         if (pll_id != twl6040->pll)
 493                                 clk_prepare_enable(twl6040->mclk);
 494                         /*
 495                          * enable clock slicer to ensure input waveform is
 496                          * square
 497                          */
 498                         hppllctl |= TWL6040_HPLLSQRENA;
 499
 500                         twl6040_reg_write(twl6040, TWL6040_REG_HPPLLCTL,
 501                                           hppllctl);
 502                         usleep_range(500, 700);
 503                         lppllctl |= TWL6040_HPLLSEL;
 504                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 505                                           lppllctl);
 506                         lppllctl &= ~TWL6040_LPLLENA;
 507                         twl6040_reg_write(twl6040, TWL6040_REG_LPPLLCTL,
 508                                           lppllctl);
 509
 510                         twl6040->mclk_rate = freq_in;
 511                 }
 512                 break;
 513         default:
 514                 dev_err(twl6040->dev, "unknown pll id %d\n", pll_id);
 515                 ret = -EINVAL;
 516                 goto pll_out;
 517         }
 518
 519         twl6040->sysclk_rate = freq_out;
 520         twl6040->pll = pll_id;
 521
 522 pll_out:
 523         mutex_unlock(&twl6040->mutex);
 524         return ret;
 525 }
 526 EXPORT_SYMBOL(twl6040_set_pll);
 527
 528 int twl6040_get_pll(struct twl6040 *twl6040)
 529 {
 530         if (twl6040->power_count)
 531                 return twl6040->pll;
 532         else
 533                 return -ENODEV;
 534 }
 535 EXPORT_SYMBOL(twl6040_get_pll);
 536
 537 unsigned int twl6040_get_sysclk(struct twl6040 *twl6040)
 538 {
 539         return twl6040->sysclk_rate;
 540 }
 541 EXPORT_SYMBOL(twl6040_get_sysclk);
 542
 543 /* Get the combined status of the vibra control register */
 544 int twl6040_get_vibralr_status(struct twl6040 *twl6040)
 545 {
 546         unsigned int reg;
 547         int ret;
 548         u8 status;
 549
 550         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLL, &reg);
 551         if (ret != 0)
 552                 return ret;
 553         status = reg;
 554
 555         ret = regmap_read(twl6040->regmap, TWL6040_REG_VIBCTLR, &reg);
 556         if (ret != 0)
 557                 return ret;
 558         status |= reg;
 559
 560         status &= (TWL6040_VIBENA | TWL6040_VIBSEL);
 561
 562         return status;
 563 }
 564 EXPORT_SYMBOL(twl6040_get_vibralr_status);
 565
 566 static struct resource twl6040_vibra_rsrc[] = {
 567         {
 568                 .flags = IORESOURCE_IRQ,
 569         },
 570 };
 571
 572 static struct resource twl6040_codec_rsrc[] = {
 573         {
 574                 .flags = IORESOURCE_IRQ,
 575         },
 576 };
 577
 578 static bool twl6040_readable_reg(struct device *dev, unsigned int reg)
 579 {
 580         /* Register 0 is not readable */
 581         if (!reg)
 582                 return false;
 583         return true;
 584 }
 585
 586 static bool twl6040_volatile_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_INTID:
 592         case TWL6040_REG_LPPLLCTL:
 593         case TWL6040_REG_HPPLLCTL:
 594         case TWL6040_REG_STATUS:
 595                 return true;
 596         default:
 597                 return false;
 598         }
 599 }
 600
 601 static bool twl6040_writeable_reg(struct device *dev, unsigned int reg)
 602 {
 603         switch (reg) {
 604         case TWL6040_REG_ASICID:
 605         case TWL6040_REG_ASICREV:
 606         case TWL6040_REG_STATUS:
 607                 return false;
 608         default:
 609                 return true;
 610         }
 611 }
 612
 613 static const struct regmap_config twl6040_regmap_config = {
 614         .reg_bits = 8,
 615         .val_bits = 8,
 616
 617         .reg_defaults = twl6040_defaults,
 618         .num_reg_defaults = ARRAY_SIZE(twl6040_defaults),
 619
 620         .max_register = TWL6040_REG_STATUS, /* 0x2e */
 621
 622         .readable_reg = twl6040_readable_reg,
 623         .volatile_reg = twl6040_volatile_reg,
 624         .writeable_reg = twl6040_writeable_reg,
 625
 626         .cache_type = REGCACHE_RBTREE,
 627         .use_single_read = true,
 628         .use_single_write = true,
 629 };
 630
 631 static const struct regmap_irq twl6040_irqs[] = {
 632         { .reg_offset = 0, .mask = TWL6040_THINT, },
 633         { .reg_offset = 0, .mask = TWL6040_PLUGINT | TWL6040_UNPLUGINT, },
 634         { .reg_offset = 0, .mask = TWL6040_HOOKINT, },
 635         { .reg_offset = 0, .mask = TWL6040_HFINT, },
 636         { .reg_offset = 0, .mask = TWL6040_VIBINT, },
 637         { .reg_offset = 0, .mask = TWL6040_READYINT, },
 638 };
 639
 640 static struct regmap_irq_chip twl6040_irq_chip = {
 641         .name = "twl6040",
 642         .irqs = twl6040_irqs,
 643         .num_irqs = ARRAY_SIZE(twl6040_irqs),
 644
 645         .num_regs = 1,
 646         .status_base = TWL6040_REG_INTID,
 647         .mask_base = TWL6040_REG_INTMR,
 648 };
 649
 650 static int twl6040_probe(struct i2c_client *client,
 651                          const struct i2c_device_id *id)
 652 {
 653         struct device_node *node = client->dev.of_node;
 654         struct twl6040 *twl6040;
 655         struct mfd_cell *cell = NULL;
 656         int irq, ret, children = 0;
 657
 658         if (!node) {
 659                 dev_err(&client->dev, "of node is missing\n");
 660                 return -EINVAL;
 661         }
 662
 663         /* In order to operate correctly we need valid interrupt config */
 664         if (!client->irq) {
 665                 dev_err(&client->dev, "Invalid IRQ configuration\n");
 666                 return -EINVAL;
 667         }
 668
 669         twl6040 = devm_kzalloc(&client->dev, sizeof(struct twl6040),
 670                                GFP_KERNEL);
 671         if (!twl6040)
 672                 return -ENOMEM;
 673
 674         twl6040->regmap = devm_regmap_init_i2c(client, &twl6040_regmap_config);
 675         if (IS_ERR(twl6040->regmap))
 676                 return PTR_ERR(twl6040->regmap);
 677
 678         i2c_set_clientdata(client, twl6040);
 679
 680         twl6040->clk32k = devm_clk_get(&client->dev, "clk32k");
 681         if (IS_ERR(twl6040->clk32k)) {
 682                 if (PTR_ERR(twl6040->clk32k) == -EPROBE_DEFER)
 683                         return -EPROBE_DEFER;
 684                 dev_dbg(&client->dev, "clk32k is not handled\n");
 685                 twl6040->clk32k = NULL;
 686         }
 687
 688         twl6040->mclk = devm_clk_get(&client->dev, "mclk");
 689         if (IS_ERR(twl6040->mclk)) {
 690                 if (PTR_ERR(twl6040->mclk) == -EPROBE_DEFER)
 691                         return -EPROBE_DEFER;
 692                 dev_dbg(&client->dev, "mclk is not handled\n");
 693                 twl6040->mclk = NULL;
 694         }
 695
 696         twl6040->supplies[0].supply = "vio";
 697         twl6040->supplies[1].supply = "v2v1";
 698         ret = devm_regulator_bulk_get(&client->dev, TWL6040_NUM_SUPPLIES,
 699                                       twl6040->supplies);
 700         if (ret != 0) {
 701                 dev_err(&client->dev, "Failed to get supplies: %d\n", ret);
 702                 return ret;
 703         }
 704
 705         ret = regulator_bulk_enable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 706         if (ret != 0) {
 707                 dev_err(&client->dev, "Failed to enable supplies: %d\n", ret);
 708                 return ret;
 709         }
 710
 711         twl6040->dev = &client->dev;
 712         twl6040->irq = client->irq;
 713
 714         mutex_init(&twl6040->mutex);
 715         init_completion(&twl6040->ready);
 716
 717         regmap_register_patch(twl6040->regmap, twl6040_patch,
 718                               ARRAY_SIZE(twl6040_patch));
 719
 720         twl6040->rev = twl6040_reg_read(twl6040, TWL6040_REG_ASICREV);
 721         if (twl6040->rev < 0) {
 722                 dev_err(&client->dev, "Failed to read revision register: %d\n",
 723                         twl6040->rev);
 724                 ret = twl6040->rev;
 725                 goto gpio_err;
 726         }
 727
 728         /* ERRATA: Automatic power-up is not possible in ES1.0 */
 729         if (twl6040_get_revid(twl6040) > TWL6040_REV_ES1_0)
 730                 twl6040->audpwron = of_get_named_gpio(node,
 731                                                       "ti,audpwron-gpio", 0);
 732         else
 733                 twl6040->audpwron = -EINVAL;
 734
 735         if (gpio_is_valid(twl6040->audpwron)) {
 736                 ret = devm_gpio_request_one(&client->dev, twl6040->audpwron,
 737                                             GPIOF_OUT_INIT_LOW, "audpwron");
 738                 if (ret)
 739                         goto gpio_err;
 740
 741                 /* Clear any pending interrupt */
 742                 twl6040_reg_read(twl6040, TWL6040_REG_INTID);
 743         }
 744
 745         ret = regmap_add_irq_chip(twl6040->regmap, twl6040->irq, IRQF_ONESHOT,
 746                                   0, &twl6040_irq_chip, &twl6040->irq_data);
 747         if (ret < 0)
 748                 goto gpio_err;
 749
 750         twl6040->irq_ready = regmap_irq_get_virq(twl6040->irq_data,
 751                                                  TWL6040_IRQ_READY);
 752         twl6040->irq_th = regmap_irq_get_virq(twl6040->irq_data,
 753                                               TWL6040_IRQ_TH);
 754
 755         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_ready, NULL,
 756                                         twl6040_readyint_handler, IRQF_ONESHOT,
 757                                         "twl6040_irq_ready", twl6040);
 758         if (ret) {
 759                 dev_err(twl6040->dev, "READY IRQ request failed: %d\n", ret);
 760                 goto readyirq_err;
 761         }
 762
 763         ret = devm_request_threaded_irq(twl6040->dev, twl6040->irq_th, NULL,
 764                                         twl6040_thint_handler, IRQF_ONESHOT,
 765                                         "twl6040_irq_th", twl6040);
 766         if (ret) {
 767                 dev_err(twl6040->dev, "Thermal IRQ request failed: %d\n", ret);
 768                 goto readyirq_err;
 769         }
 770
 771         /*
 772          * The main functionality of twl6040 to provide audio on OMAP4+ systems.
 773          * We can add the ASoC codec child whenever this driver has been loaded.
 774          */
 775         irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_PLUG);
 776         cell = &twl6040->cells[children];
 777         cell->name = "twl6040-codec";
 778         twl6040_codec_rsrc[0].start = irq;
 779         twl6040_codec_rsrc[0].end = irq;
 780         cell->resources = twl6040_codec_rsrc;
 781         cell->num_resources = ARRAY_SIZE(twl6040_codec_rsrc);
 782         children++;
 783
 784         /* Vibra input driver support */
 785         if (twl6040_has_vibra(node)) {
 786                 irq = regmap_irq_get_virq(twl6040->irq_data, TWL6040_IRQ_VIB);
 787
 788                 cell = &twl6040->cells[children];
 789                 cell->name = "twl6040-vibra";
 790                 twl6040_vibra_rsrc[0].start = irq;
 791                 twl6040_vibra_rsrc[0].end = irq;
 792                 cell->resources = twl6040_vibra_rsrc;
 793                 cell->num_resources = ARRAY_SIZE(twl6040_vibra_rsrc);
 794                 children++;
 795         }
 796
 797         /* GPO support */
 798         cell = &twl6040->cells[children];
 799         cell->name = "twl6040-gpo";
 800         children++;
 801
 802         /* PDM clock support  */
 803         cell = &twl6040->cells[children];
 804         cell->name = "twl6040-pdmclk";
 805         children++;
 806
 807         /* The chip is powered down so mark regmap to cache only and dirty */
 808         regcache_cache_only(twl6040->regmap, true);
 809         regcache_mark_dirty(twl6040->regmap);
 810
 811         ret = mfd_add_devices(&client->dev, -1, twl6040->cells, children,
 812                               NULL, 0, NULL);
 813         if (ret)
 814                 goto readyirq_err;
 815
 816         return 0;
 817
 818 readyirq_err:
 819         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 820 gpio_err:
 821         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 822         return ret;
 823 }
 824
 825 static int twl6040_remove(struct i2c_client *client)
 826 {
 827         struct twl6040 *twl6040 = i2c_get_clientdata(client);
 828
 829         if (twl6040->power_count)
 830                 twl6040_power(twl6040, 0);
 831
 832         regmap_del_irq_chip(twl6040->irq, twl6040->irq_data);
 833
 834         mfd_remove_devices(&client->dev);
 835
 836         regulator_bulk_disable(TWL6040_NUM_SUPPLIES, twl6040->supplies);
 837
 838         return 0;
 839 }
 840
 841 static const struct i2c_device_id twl6040_i2c_id[] = {
 842         { "twl6040", 0, },
 843         { "twl6041", 0, },
 844         { },
 845 };
 846 MODULE_DEVICE_TABLE(i2c, twl6040_i2c_id);
 847
 848 static struct i2c_driver twl6040_driver = {
 849         .driver = {
 850                 .name = "twl6040",
 851         },
 852         .probe          = twl6040_probe,
 853         .remove         = twl6040_remove,
 854         .id_table       = twl6040_i2c_id,
 855 };
 856
 857 module_i2c_driver(twl6040_driver);
 858
 859 MODULE_DESCRIPTION("TWL6040 MFD");
 860 MODULE_AUTHOR("Misael Lopez Cruz <misael.lopez@ti.com>");
 861 MODULE_AUTHOR("Jorge Eduardo Candelaria <jorge.candelaria@ti.com>");
 862 MODULE_LICENSE("GPL");