sound/soc/codecs/cs35l32.c

   1 /*
   2  * cs35l32.c -- CS35L32 ALSA SoC audio driver
   3  *
   4  * Copyright 2014 CirrusLogic, Inc.
   5  *
   6  * Author: Brian Austin <brian.austin@cirrus.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/version.h>
  17 #include <linux/kernel.h>
  18 #include <linux/init.h>
  19 #include <linux/delay.h>
  20 #include <linux/i2c.h>
  21 #include <linux/gpio.h>
  22 #include <linux/regmap.h>
  23 #include <linux/slab.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/regulator/consumer.h>
  26 #include <linux/gpio/consumer.h>
  27 #include <linux/of_device.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/soc.h>
  32 #include <sound/soc-dapm.h>
  33 #include <sound/initval.h>
  34 #include <sound/tlv.h>
  35 #include <dt-bindings/sound/cs35l32.h>
  36
  37 #include "cs35l32.h"
  38
  39 #define CS35L32_NUM_SUPPLIES 2
  40 static const char *const cs35l32_supply_names[CS35L32_NUM_SUPPLIES] = {
  41         "VA",
  42         "VP",
  43 };
  44
  45 struct  cs35l32_private {
  46         struct regmap *regmap;
  47         struct snd_soc_codec *codec;
  48         struct regulator_bulk_data supplies[CS35L32_NUM_SUPPLIES];
  49         struct cs35l32_platform_data pdata;
  50         struct gpio_desc *reset_gpio;
  51 };
  52
  53 static const struct reg_default cs35l32_reg_defaults[] = {
  54
  55         { 0x06, 0x04 }, /* Power Ctl 1 */
  56         { 0x07, 0xE8 }, /* Power Ctl 2 */
  57         { 0x08, 0x40 }, /* Clock Ctl */
  58         { 0x09, 0x20 }, /* Low Battery Threshold */
  59         { 0x0A, 0x00 }, /* Voltage Monitor [RO] */
  60         { 0x0B, 0x40 }, /* Conv Peak Curr Protection CTL */
  61         { 0x0C, 0x07 }, /* IMON Scaling */
  62         { 0x0D, 0x03 }, /* Audio/LED Pwr Manager */
  63         { 0x0F, 0x20 }, /* Serial Port Control */
  64         { 0x10, 0x14 }, /* Class D Amp CTL */
  65         { 0x11, 0x00 }, /* Protection Release CTL */
  66         { 0x12, 0xFF }, /* Interrupt Mask 1 */
  67         { 0x13, 0xFF }, /* Interrupt Mask 2 */
  68         { 0x14, 0xFF }, /* Interrupt Mask 3 */
  69         { 0x19, 0x00 }, /* LED Flash Mode Current */
  70         { 0x1A, 0x00 }, /* LED Movie Mode Current */
  71         { 0x1B, 0x20 }, /* LED Flash Timer */
  72         { 0x1C, 0x00 }, /* LED Flash Inhibit Current */
  73 };
  74
  75 static bool cs35l32_readable_register(struct device *dev, unsigned int reg)
  76 {
  77         switch (reg) {
  78         case CS35L32_DEVID_AB:
  79         case CS35L32_DEVID_CD:
  80         case CS35L32_DEVID_E:
  81         case CS35L32_FAB_ID:
  82         case CS35L32_REV_ID:
  83         case CS35L32_PWRCTL1:
  84         case CS35L32_PWRCTL2:
  85         case CS35L32_CLK_CTL:
  86         case CS35L32_BATT_THRESHOLD:
  87         case CS35L32_VMON:
  88         case CS35L32_BST_CPCP_CTL:
  89         case CS35L32_IMON_SCALING:
  90         case CS35L32_AUDIO_LED_MNGR:
  91         case CS35L32_ADSP_CTL:
  92         case CS35L32_CLASSD_CTL:
  93         case CS35L32_PROTECT_CTL:
  94         case CS35L32_INT_MASK_1:
  95         case CS35L32_INT_MASK_2:
  96         case CS35L32_INT_MASK_3:
  97         case CS35L32_INT_STATUS_1:
  98         case CS35L32_INT_STATUS_2:
  99         case CS35L32_INT_STATUS_3:
 100         case CS35L32_LED_STATUS:
 101         case CS35L32_FLASH_MODE:
 102         case CS35L32_MOVIE_MODE:
 103         case CS35L32_FLASH_TIMER:
 104         case CS35L32_FLASH_INHIBIT:
 105                 return true;
 106         default:
 107                 return false;
 108         }
 109 }
 110
 111 static bool cs35l32_volatile_register(struct device *dev, unsigned int reg)
 112 {
 113         switch (reg) {
 114         case CS35L32_DEVID_AB:
 115         case CS35L32_DEVID_CD:
 116         case CS35L32_DEVID_E:
 117         case CS35L32_FAB_ID:
 118         case CS35L32_REV_ID:
 119         case CS35L32_INT_STATUS_1:
 120         case CS35L32_INT_STATUS_2:
 121         case CS35L32_INT_STATUS_3:
 122         case CS35L32_LED_STATUS:
 123                 return true;
 124         default:
 125                 return false;
 126         }
 127 }
 128
 129 static bool cs35l32_precious_register(struct device *dev, unsigned int reg)
 130 {
 131         switch (reg) {
 132         case CS35L32_INT_STATUS_1:
 133         case CS35L32_INT_STATUS_2:
 134         case CS35L32_INT_STATUS_3:
 135         case CS35L32_LED_STATUS:
 136                 return true;
 137         default:
 138                 return false;
 139         }
 140 }
 141
 142 static DECLARE_TLV_DB_SCALE(classd_ctl_tlv, 900, 300, 0);
 143
 144 static const struct snd_kcontrol_new imon_ctl =
 145         SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 6, 1, 1);
 146
 147 static const struct snd_kcontrol_new vmon_ctl =
 148         SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 7, 1, 1);
 149
 150 static const struct snd_kcontrol_new vpmon_ctl =
 151         SOC_DAPM_SINGLE("Switch", CS35L32_PWRCTL2, 5, 1, 1);
 152
 153 static const struct snd_kcontrol_new cs35l32_snd_controls[] = {
 154         SOC_SINGLE_TLV("Speaker Volume", CS35L32_CLASSD_CTL,
 155                        3, 0x04, 1, classd_ctl_tlv),
 156         SOC_SINGLE("Zero Cross Switch", CS35L32_CLASSD_CTL, 2, 1, 0),
 157         SOC_SINGLE("Gain Manager Switch", CS35L32_AUDIO_LED_MNGR, 3, 1, 0),
 158 };
 159
 160 static const struct snd_soc_dapm_widget cs35l32_dapm_widgets[] = {
 161
 162         SND_SOC_DAPM_SUPPLY("BOOST", CS35L32_PWRCTL1, 2, 1, NULL, 0),
 163         SND_SOC_DAPM_OUT_DRV("Speaker", CS35L32_PWRCTL1, 7, 1, NULL, 0),
 164
 165         SND_SOC_DAPM_AIF_OUT("SDOUT", NULL, 0, CS35L32_PWRCTL2, 3, 1),
 166
 167         SND_SOC_DAPM_INPUT("VP"),
 168         SND_SOC_DAPM_INPUT("ISENSE"),
 169         SND_SOC_DAPM_INPUT("VSENSE"),
 170
 171         SND_SOC_DAPM_SWITCH("VMON ADC", CS35L32_PWRCTL2, 7, 1, &vmon_ctl),
 172         SND_SOC_DAPM_SWITCH("IMON ADC", CS35L32_PWRCTL2, 6, 1, &imon_ctl),
 173         SND_SOC_DAPM_SWITCH("VPMON ADC", CS35L32_PWRCTL2, 5, 1, &vpmon_ctl),
 174 };
 175
 176 static const struct snd_soc_dapm_route cs35l32_audio_map[] = {
 177
 178         {"Speaker", NULL, "BOOST"},
 179
 180         {"VMON ADC", NULL, "VSENSE"},
 181         {"IMON ADC", NULL, "ISENSE"},
 182         {"VPMON ADC", NULL, "VP"},
 183
 184         {"SDOUT", "Switch", "VMON ADC"},
 185         {"SDOUT",  "Switch", "IMON ADC"},
 186         {"SDOUT", "Switch", "VPMON ADC"},
 187
 188         {"Capture", NULL, "SDOUT"},
 189 };
 190
 191 static int cs35l32_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 192 {
 193         struct snd_soc_codec *codec = codec_dai->codec;
 194
 195         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 196         case SND_SOC_DAIFMT_CBM_CFM:
 197                 snd_soc_update_bits(codec, CS35L32_ADSP_CTL,
 198                                     CS35L32_ADSP_MASTER_MASK,
 199                                 CS35L32_ADSP_MASTER_MASK);
 200                 break;
 201         case SND_SOC_DAIFMT_CBS_CFS:
 202                 snd_soc_update_bits(codec, CS35L32_ADSP_CTL,
 203                                     CS35L32_ADSP_MASTER_MASK, 0);
 204                 break;
 205         default:
 206                 return -EINVAL;
 207         }
 208
 209         return 0;
 210 }
 211
 212 static int cs35l32_set_tristate(struct snd_soc_dai *dai, int tristate)
 213 {
 214         struct snd_soc_codec *codec = dai->codec;
 215
 216         return snd_soc_update_bits(codec, CS35L32_PWRCTL2,
 217                                         CS35L32_SDOUT_3ST, tristate << 3);
 218 }
 219
 220 static const struct snd_soc_dai_ops cs35l32_ops = {
 221         .set_fmt = cs35l32_set_dai_fmt,
 222         .set_tristate = cs35l32_set_tristate,
 223 };
 224
 225 static struct snd_soc_dai_driver cs35l32_dai[] = {
 226         {
 227                 .name = "cs35l32-monitor",
 228                 .id = 0,
 229                 .capture = {
 230                         .stream_name = "Capture",
 231                         .channels_min = 2,
 232                         .channels_max = 2,
 233                         .rates = CS35L32_RATES,
 234                         .formats = CS35L32_FORMATS,
 235                 },
 236                 .ops = &cs35l32_ops,
 237                 .symmetric_rates = 1,
 238         }
 239 };
 240
 241 static int cs35l32_codec_set_sysclk(struct snd_soc_codec *codec,
 242                               int clk_id, int source, unsigned int freq, int dir)
 243 {
 244         unsigned int val;
 245
 246         switch (freq) {
 247         case 6000000:
 248                 val = CS35L32_MCLK_RATIO;
 249                 break;
 250         case 12000000:
 251                 val = CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO;
 252                 break;
 253         case 6144000:
 254                 val = 0;
 255                 break;
 256         case 12288000:
 257                 val = CS35L32_MCLK_DIV2_MASK;
 258                 break;
 259         default:
 260                 return -EINVAL;
 261         }
 262
 263         return snd_soc_update_bits(codec, CS35L32_CLK_CTL,
 264                         CS35L32_MCLK_DIV2_MASK | CS35L32_MCLK_RATIO_MASK, val);
 265 }
 266
 267 static const struct snd_soc_codec_driver soc_codec_dev_cs35l32 = {
 268         .set_sysclk = cs35l32_codec_set_sysclk,
 269
 270         .dapm_widgets = cs35l32_dapm_widgets,
 271         .num_dapm_widgets = ARRAY_SIZE(cs35l32_dapm_widgets),
 272         .dapm_routes = cs35l32_audio_map,
 273         .num_dapm_routes = ARRAY_SIZE(cs35l32_audio_map),
 274
 275         .controls = cs35l32_snd_controls,
 276         .num_controls = ARRAY_SIZE(cs35l32_snd_controls),
 277 };
 278
 279 /* Current and threshold powerup sequence Pg37 in datasheet */
 280 static const struct reg_default cs35l32_monitor_patch[] = {
 281
 282         { 0x00, 0x99 },
 283         { 0x48, 0x17 },
 284         { 0x49, 0x56 },
 285         { 0x43, 0x01 },
 286         { 0x3B, 0x62 },
 287         { 0x3C, 0x80 },
 288         { 0x00, 0x00 },
 289 };
 290
 291 static const struct regmap_config cs35l32_regmap = {
 292         .reg_bits = 8,
 293         .val_bits = 8,
 294
 295         .max_register = CS35L32_MAX_REGISTER,
 296         .reg_defaults = cs35l32_reg_defaults,
 297         .num_reg_defaults = ARRAY_SIZE(cs35l32_reg_defaults),
 298         .volatile_reg = cs35l32_volatile_register,
 299         .readable_reg = cs35l32_readable_register,
 300         .precious_reg = cs35l32_precious_register,
 301         .cache_type = REGCACHE_RBTREE,
 302 };
 303
 304 static int cs35l32_handle_of_data(struct i2c_client *i2c_client,
 305                                     struct cs35l32_platform_data *pdata)
 306 {
 307         struct device_node *np = i2c_client->dev.of_node;
 308         unsigned int val;
 309
 310         if (of_property_read_u32(np, "cirrus,sdout-share", &val) >= 0)
 311                 pdata->sdout_share = val;
 312
 313         of_property_read_u32(np, "cirrus,boost-manager", &val);
 314         switch (val) {
 315         case CS35L32_BOOST_MGR_AUTO:
 316         case CS35L32_BOOST_MGR_AUTO_AUDIO:
 317         case CS35L32_BOOST_MGR_BYPASS:
 318         case CS35L32_BOOST_MGR_FIXED:
 319                 pdata->boost_mng = val;
 320                 break;
 321         default:
 322                 dev_err(&i2c_client->dev,
 323                         "Wrong cirrus,boost-manager DT value %d\n", val);
 324                 pdata->boost_mng = CS35L32_BOOST_MGR_BYPASS;
 325         }
 326
 327         of_property_read_u32(np, "cirrus,sdout-datacfg", &val);
 328         switch (val) {
 329         case CS35L32_DATA_CFG_LR_VP:
 330         case CS35L32_DATA_CFG_LR_STAT:
 331         case CS35L32_DATA_CFG_LR:
 332         case CS35L32_DATA_CFG_LR_VPSTAT:
 333                 pdata->sdout_datacfg = val;
 334                 break;
 335         default:
 336                 dev_err(&i2c_client->dev,
 337                         "Wrong cirrus,sdout-datacfg DT value %d\n", val);
 338                 pdata->sdout_datacfg = CS35L32_DATA_CFG_LR;
 339         }
 340
 341         of_property_read_u32(np, "cirrus,battery-threshold", &val);
 342         switch (val) {
 343         case CS35L32_BATT_THRESH_3_1V:
 344         case CS35L32_BATT_THRESH_3_2V:
 345         case CS35L32_BATT_THRESH_3_3V:
 346         case CS35L32_BATT_THRESH_3_4V:
 347                 pdata->batt_thresh = val;
 348                 break;
 349         default:
 350                 dev_err(&i2c_client->dev,
 351                         "Wrong cirrus,battery-threshold DT value %d\n", val);
 352                 pdata->batt_thresh = CS35L32_BATT_THRESH_3_3V;
 353         }
 354
 355         of_property_read_u32(np, "cirrus,battery-recovery", &val);
 356         switch (val) {
 357         case CS35L32_BATT_RECOV_3_1V:
 358         case CS35L32_BATT_RECOV_3_2V:
 359         case CS35L32_BATT_RECOV_3_3V:
 360         case CS35L32_BATT_RECOV_3_4V:
 361         case CS35L32_BATT_RECOV_3_5V:
 362         case CS35L32_BATT_RECOV_3_6V:
 363                 pdata->batt_recov = val;
 364                 break;
 365         default:
 366                 dev_err(&i2c_client->dev,
 367                         "Wrong cirrus,battery-recovery DT value %d\n", val);
 368                 pdata->batt_recov = CS35L32_BATT_RECOV_3_4V;
 369         }
 370
 371         return 0;
 372 }
 373
 374 static int cs35l32_i2c_probe(struct i2c_client *i2c_client,
 375                                        const struct i2c_device_id *id)
 376 {
 377         struct cs35l32_private *cs35l32;
 378         struct cs35l32_platform_data *pdata =
 379                 dev_get_platdata(&i2c_client->dev);
 380         int ret, i;
 381         unsigned int devid = 0;
 382         unsigned int reg;
 383
 384
 385         cs35l32 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs35l32_private),
 386                                GFP_KERNEL);
 387         if (!cs35l32) {
 388                 dev_err(&i2c_client->dev, "could not allocate codec\n");
 389                 return -ENOMEM;
 390         }
 391
 392         i2c_set_clientdata(i2c_client, cs35l32);
 393
 394         cs35l32->regmap = devm_regmap_init_i2c(i2c_client, &cs35l32_regmap);
 395         if (IS_ERR(cs35l32->regmap)) {
 396                 ret = PTR_ERR(cs35l32->regmap);
 397                 dev_err(&i2c_client->dev, "regmap_init() failed: %d\n", ret);
 398                 return ret;
 399         }
 400
 401         if (pdata) {
 402                 cs35l32->pdata = *pdata;
 403         } else {
 404                 pdata = devm_kzalloc(&i2c_client->dev,
 405                                      sizeof(struct cs35l32_platform_data),
 406                                 GFP_KERNEL);
 407                 if (!pdata) {
 408                         dev_err(&i2c_client->dev, "could not allocate pdata\n");
 409                         return -ENOMEM;
 410                 }
 411                 if (i2c_client->dev.of_node) {
 412                         ret = cs35l32_handle_of_data(i2c_client,
 413                                                      &cs35l32->pdata);
 414                         if (ret != 0)
 415                                 return ret;
 416                 }
 417         }
 418
 419         for (i = 0; i < ARRAY_SIZE(cs35l32->supplies); i++)
 420                 cs35l32->supplies[i].supply = cs35l32_supply_names[i];
 421
 422         ret = devm_regulator_bulk_get(&i2c_client->dev,
 423                                       ARRAY_SIZE(cs35l32->supplies),
 424                                       cs35l32->supplies);
 425         if (ret != 0) {
 426                 dev_err(&i2c_client->dev,
 427                         "Failed to request supplies: %d\n", ret);
 428                 return ret;
 429         }
 430
 431         ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
 432                                     cs35l32->supplies);
 433         if (ret != 0) {
 434                 dev_err(&i2c_client->dev,
 435                         "Failed to enable supplies: %d\n", ret);
 436                 return ret;
 437         }
 438
 439         /* Reset the Device */
 440         cs35l32->reset_gpio = devm_gpiod_get_optional(&i2c_client->dev,
 441                 "reset", GPIOD_OUT_LOW);
 442         if (IS_ERR(cs35l32->reset_gpio))
 443                 return PTR_ERR(cs35l32->reset_gpio);
 444
 445         if (cs35l32->reset_gpio)
 446                 gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
 447
 448         /* initialize codec */
 449         ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_AB, &reg);
 450         devid = (reg & 0xFF) << 12;
 451
 452         ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_CD, &reg);
 453         devid |= (reg & 0xFF) << 4;
 454
 455         ret = regmap_read(cs35l32->regmap, CS35L32_DEVID_E, &reg);
 456         devid |= (reg & 0xF0) >> 4;
 457
 458         if (devid != CS35L32_CHIP_ID) {
 459                 ret = -ENODEV;
 460                 dev_err(&i2c_client->dev,
 461                         "CS35L32 Device ID (%X). Expected %X\n",
 462                         devid, CS35L32_CHIP_ID);
 463                 return ret;
 464         }
 465
 466         ret = regmap_read(cs35l32->regmap, CS35L32_REV_ID, &reg);
 467         if (ret < 0) {
 468                 dev_err(&i2c_client->dev, "Get Revision ID failed\n");
 469                 return ret;
 470         }
 471
 472         ret = regmap_register_patch(cs35l32->regmap, cs35l32_monitor_patch,
 473                                     ARRAY_SIZE(cs35l32_monitor_patch));
 474         if (ret < 0) {
 475                 dev_err(&i2c_client->dev, "Failed to apply errata patch\n");
 476                 return ret;
 477         }
 478
 479         dev_info(&i2c_client->dev,
 480                  "Cirrus Logic CS35L32, Revision: %02X\n", reg & 0xFF);
 481
 482         /* Setup VBOOST Management */
 483         if (cs35l32->pdata.boost_mng)
 484                 regmap_update_bits(cs35l32->regmap, CS35L32_AUDIO_LED_MNGR,
 485                                    CS35L32_BOOST_MASK,
 486                                 cs35l32->pdata.boost_mng);
 487
 488         /* Setup ADSP Format Config */
 489         if (cs35l32->pdata.sdout_share)
 490                 regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
 491                                     CS35L32_ADSP_SHARE_MASK,
 492                                 cs35l32->pdata.sdout_share << 3);
 493
 494         /* Setup ADSP Data Configuration */
 495         if (cs35l32->pdata.sdout_datacfg)
 496                 regmap_update_bits(cs35l32->regmap, CS35L32_ADSP_CTL,
 497                                    CS35L32_ADSP_DATACFG_MASK,
 498                                 cs35l32->pdata.sdout_datacfg << 4);
 499
 500         /* Setup Low Battery Recovery  */
 501         if (cs35l32->pdata.batt_recov)
 502                 regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
 503                                    CS35L32_BATT_REC_MASK,
 504                                 cs35l32->pdata.batt_recov << 1);
 505
 506         /* Setup Low Battery Threshold */
 507         if (cs35l32->pdata.batt_thresh)
 508                 regmap_update_bits(cs35l32->regmap, CS35L32_BATT_THRESHOLD,
 509                                    CS35L32_BATT_THRESH_MASK,
 510                                 cs35l32->pdata.batt_thresh << 4);
 511
 512         /* Power down the AMP */
 513         regmap_update_bits(cs35l32->regmap, CS35L32_PWRCTL1, CS35L32_PDN_AMP,
 514                             CS35L32_PDN_AMP);
 515
 516         /* Clear MCLK Error Bit since we don't have the clock yet */
 517         ret = regmap_read(cs35l32->regmap, CS35L32_INT_STATUS_1, &reg);
 518
 519         ret =  snd_soc_register_codec(&i2c_client->dev,
 520                         &soc_codec_dev_cs35l32, cs35l32_dai,
 521                         ARRAY_SIZE(cs35l32_dai));
 522         if (ret < 0)
 523                 goto err_disable;
 524
 525         return 0;
 526
 527 err_disable:
 528         regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
 529                                cs35l32->supplies);
 530         return ret;
 531 }
 532
 533 static int cs35l32_i2c_remove(struct i2c_client *i2c_client)
 534 {
 535         struct cs35l32_private *cs35l32 = i2c_get_clientdata(i2c_client);
 536
 537         snd_soc_unregister_codec(&i2c_client->dev);
 538
 539         /* Hold down reset */
 540         if (cs35l32->reset_gpio)
 541                 gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
 542
 543         return 0;
 544 }
 545
 546 #ifdef CONFIG_PM
 547 static int cs35l32_runtime_suspend(struct device *dev)
 548 {
 549         struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
 550
 551         regcache_cache_only(cs35l32->regmap, true);
 552         regcache_mark_dirty(cs35l32->regmap);
 553
 554         /* Hold down reset */
 555         if (cs35l32->reset_gpio)
 556                 gpiod_set_value_cansleep(cs35l32->reset_gpio, 0);
 557
 558         /* remove power */
 559         regulator_bulk_disable(ARRAY_SIZE(cs35l32->supplies),
 560                                cs35l32->supplies);
 561
 562         return 0;
 563 }
 564
 565 static int cs35l32_runtime_resume(struct device *dev)
 566 {
 567         struct cs35l32_private *cs35l32 = dev_get_drvdata(dev);
 568         int ret;
 569
 570         /* Enable power */
 571         ret = regulator_bulk_enable(ARRAY_SIZE(cs35l32->supplies),
 572                                     cs35l32->supplies);
 573         if (ret != 0) {
 574                 dev_err(dev, "Failed to enable supplies: %d\n",
 575                         ret);
 576                 return ret;
 577         }
 578
 579         if (cs35l32->reset_gpio)
 580                 gpiod_set_value_cansleep(cs35l32->reset_gpio, 1);
 581
 582         regcache_cache_only(cs35l32->regmap, false);
 583         regcache_sync(cs35l32->regmap);
 584
 585         return 0;
 586 }
 587 #endif
 588
 589 static const struct dev_pm_ops cs35l32_runtime_pm = {
 590         SET_RUNTIME_PM_OPS(cs35l32_runtime_suspend, cs35l32_runtime_resume,
 591                            NULL)
 592 };
 593
 594 static const struct of_device_id cs35l32_of_match[] = {
 595         { .compatible = "cirrus,cs35l32", },
 596         {},
 597 };
 598 MODULE_DEVICE_TABLE(of, cs35l32_of_match);
 599
 600
 601 static const struct i2c_device_id cs35l32_id[] = {
 602         {"cs35l32", 0},
 603         {}
 604 };
 605
 606 MODULE_DEVICE_TABLE(i2c, cs35l32_id);
 607
 608 static struct i2c_driver cs35l32_i2c_driver = {
 609         .driver = {
 610                    .name = "cs35l32",
 611                    .owner = THIS_MODULE,
 612                    .pm = &cs35l32_runtime_pm,
 613                    .of_match_table = cs35l32_of_match,
 614                    },
 615         .id_table = cs35l32_id,
 616         .probe = cs35l32_i2c_probe,
 617         .remove = cs35l32_i2c_remove,
 618 };
 619
 620 module_i2c_driver(cs35l32_i2c_driver);
 621
 622 MODULE_DESCRIPTION("ASoC CS35L32 driver");
 623 MODULE_AUTHOR("Brian Austin, Cirrus Logic Inc, <brian.austin@cirrus.com>");
 624 MODULE_LICENSE("GPL");