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