sound/soc/codecs/max98373-i2c.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (c) 2017, Maxim Integrated
   3
   4 #include <linux/acpi.h>
   5 #include <linux/delay.h>
   6 #include <linux/i2c.h>
   7 #include <linux/module.h>
   8 #include <linux/mod_devicetable.h>
   9 #include <linux/of.h>
  10 #include <linux/pm.h>
  11 #include <linux/regmap.h>
  12 #include <linux/slab.h>
  13 #include <linux/cdev.h>
  14 #include <sound/pcm.h>
  15 #include <sound/pcm_params.h>
  16 #include <sound/soc.h>
  17 #include <sound/tlv.h>
  18 #include "max98373.h"
  19
  20 static const u32 max98373_i2c_cache_reg[] = {
  21         MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK,
  22         MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK,
  23         MAX98373_R20B6_BDE_CUR_STATE_READBACK,
  24 };
  25
  26 static struct reg_default max98373_reg[] = {
  27         {MAX98373_R2000_SW_RESET, 0x00},
  28         {MAX98373_R2001_INT_RAW1, 0x00},
  29         {MAX98373_R2002_INT_RAW2, 0x00},
  30         {MAX98373_R2003_INT_RAW3, 0x00},
  31         {MAX98373_R2004_INT_STATE1, 0x00},
  32         {MAX98373_R2005_INT_STATE2, 0x00},
  33         {MAX98373_R2006_INT_STATE3, 0x00},
  34         {MAX98373_R2007_INT_FLAG1, 0x00},
  35         {MAX98373_R2008_INT_FLAG2, 0x00},
  36         {MAX98373_R2009_INT_FLAG3, 0x00},
  37         {MAX98373_R200A_INT_EN1, 0x00},
  38         {MAX98373_R200B_INT_EN2, 0x00},
  39         {MAX98373_R200C_INT_EN3, 0x00},
  40         {MAX98373_R200D_INT_FLAG_CLR1, 0x00},
  41         {MAX98373_R200E_INT_FLAG_CLR2, 0x00},
  42         {MAX98373_R200F_INT_FLAG_CLR3, 0x00},
  43         {MAX98373_R2010_IRQ_CTRL, 0x00},
  44         {MAX98373_R2014_THERM_WARN_THRESH, 0x10},
  45         {MAX98373_R2015_THERM_SHDN_THRESH, 0x27},
  46         {MAX98373_R2016_THERM_HYSTERESIS, 0x01},
  47         {MAX98373_R2017_THERM_FOLDBACK_SET, 0xC0},
  48         {MAX98373_R2018_THERM_FOLDBACK_EN, 0x00},
  49         {MAX98373_R201E_PIN_DRIVE_STRENGTH, 0x55},
  50         {MAX98373_R2020_PCM_TX_HIZ_EN_1, 0xFE},
  51         {MAX98373_R2021_PCM_TX_HIZ_EN_2, 0xFF},
  52         {MAX98373_R2022_PCM_TX_SRC_1, 0x00},
  53         {MAX98373_R2023_PCM_TX_SRC_2, 0x00},
  54         {MAX98373_R2024_PCM_DATA_FMT_CFG, 0xC0},
  55         {MAX98373_R2025_AUDIO_IF_MODE, 0x00},
  56         {MAX98373_R2026_PCM_CLOCK_RATIO, 0x04},
  57         {MAX98373_R2027_PCM_SR_SETUP_1, 0x08},
  58         {MAX98373_R2028_PCM_SR_SETUP_2, 0x88},
  59         {MAX98373_R2029_PCM_TO_SPK_MONO_MIX_1, 0x00},
  60         {MAX98373_R202A_PCM_TO_SPK_MONO_MIX_2, 0x00},
  61         {MAX98373_R202B_PCM_RX_EN, 0x00},
  62         {MAX98373_R202C_PCM_TX_EN, 0x00},
  63         {MAX98373_R202E_ICC_RX_CH_EN_1, 0x00},
  64         {MAX98373_R202F_ICC_RX_CH_EN_2, 0x00},
  65         {MAX98373_R2030_ICC_TX_HIZ_EN_1, 0xFF},
  66         {MAX98373_R2031_ICC_TX_HIZ_EN_2, 0xFF},
  67         {MAX98373_R2032_ICC_LINK_EN_CFG, 0x30},
  68         {MAX98373_R2034_ICC_TX_CNTL, 0x00},
  69         {MAX98373_R2035_ICC_TX_EN, 0x00},
  70         {MAX98373_R2036_SOUNDWIRE_CTRL, 0x05},
  71         {MAX98373_R203D_AMP_DIG_VOL_CTRL, 0x00},
  72         {MAX98373_R203E_AMP_PATH_GAIN, 0x08},
  73         {MAX98373_R203F_AMP_DSP_CFG, 0x02},
  74         {MAX98373_R2040_TONE_GEN_CFG, 0x00},
  75         {MAX98373_R2041_AMP_CFG, 0x03},
  76         {MAX98373_R2042_AMP_EDGE_RATE_CFG, 0x00},
  77         {MAX98373_R2043_AMP_EN, 0x00},
  78         {MAX98373_R2046_IV_SENSE_ADC_DSP_CFG, 0x04},
  79         {MAX98373_R2047_IV_SENSE_ADC_EN, 0x00},
  80         {MAX98373_R2051_MEAS_ADC_SAMPLING_RATE, 0x00},
  81         {MAX98373_R2052_MEAS_ADC_PVDD_FLT_CFG, 0x00},
  82         {MAX98373_R2053_MEAS_ADC_THERM_FLT_CFG, 0x00},
  83         {MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK, 0x00},
  84         {MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK, 0x00},
  85         {MAX98373_R2056_MEAS_ADC_PVDD_CH_EN, 0x00},
  86         {MAX98373_R2090_BDE_LVL_HOLD, 0x00},
  87         {MAX98373_R2091_BDE_GAIN_ATK_REL_RATE, 0x00},
  88         {MAX98373_R2092_BDE_CLIPPER_MODE, 0x00},
  89         {MAX98373_R2097_BDE_L1_THRESH, 0x00},
  90         {MAX98373_R2098_BDE_L2_THRESH, 0x00},
  91         {MAX98373_R2099_BDE_L3_THRESH, 0x00},
  92         {MAX98373_R209A_BDE_L4_THRESH, 0x00},
  93         {MAX98373_R209B_BDE_THRESH_HYST, 0x00},
  94         {MAX98373_R20A8_BDE_L1_CFG_1, 0x00},
  95         {MAX98373_R20A9_BDE_L1_CFG_2, 0x00},
  96         {MAX98373_R20AA_BDE_L1_CFG_3, 0x00},
  97         {MAX98373_R20AB_BDE_L2_CFG_1, 0x00},
  98         {MAX98373_R20AC_BDE_L2_CFG_2, 0x00},
  99         {MAX98373_R20AD_BDE_L2_CFG_3, 0x00},
 100         {MAX98373_R20AE_BDE_L3_CFG_1, 0x00},
 101         {MAX98373_R20AF_BDE_L3_CFG_2, 0x00},
 102         {MAX98373_R20B0_BDE_L3_CFG_3, 0x00},
 103         {MAX98373_R20B1_BDE_L4_CFG_1, 0x00},
 104         {MAX98373_R20B2_BDE_L4_CFG_2, 0x00},
 105         {MAX98373_R20B3_BDE_L4_CFG_3, 0x00},
 106         {MAX98373_R20B4_BDE_INFINITE_HOLD_RELEASE, 0x00},
 107         {MAX98373_R20B5_BDE_EN, 0x00},
 108         {MAX98373_R20B6_BDE_CUR_STATE_READBACK, 0x00},
 109         {MAX98373_R20D1_DHT_CFG, 0x01},
 110         {MAX98373_R20D2_DHT_ATTACK_CFG, 0x02},
 111         {MAX98373_R20D3_DHT_RELEASE_CFG, 0x03},
 112         {MAX98373_R20D4_DHT_EN, 0x00},
 113         {MAX98373_R20E0_LIMITER_THRESH_CFG, 0x00},
 114         {MAX98373_R20E1_LIMITER_ATK_REL_RATES, 0x00},
 115         {MAX98373_R20E2_LIMITER_EN, 0x00},
 116         {MAX98373_R20FE_DEVICE_AUTO_RESTART_CFG, 0x00},
 117         {MAX98373_R20FF_GLOBAL_SHDN, 0x00},
 118         {MAX98373_R21FF_REV_ID, 0x42},
 119 };
 120
 121 static int max98373_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 122 {
 123         struct snd_soc_component *component = codec_dai->component;
 124         struct max98373_priv *max98373 = snd_soc_component_get_drvdata(component);
 125         unsigned int format = 0;
 126         unsigned int invert = 0;
 127
 128         dev_dbg(component->dev, "%s: fmt 0x%08X\n", __func__, fmt);
 129
 130         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 131         case SND_SOC_DAIFMT_NB_NF:
 132                 break;
 133         case SND_SOC_DAIFMT_IB_NF:
 134                 invert = MAX98373_PCM_MODE_CFG_PCM_BCLKEDGE;
 135                 break;
 136         default:
 137                 dev_err(component->dev, "DAI invert mode unsupported\n");
 138                 return -EINVAL;
 139         }
 140
 141         regmap_update_bits(max98373->regmap,
 142                            MAX98373_R2026_PCM_CLOCK_RATIO,
 143                            MAX98373_PCM_MODE_CFG_PCM_BCLKEDGE,
 144                            invert);
 145
 146         /* interface format */
 147         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 148         case SND_SOC_DAIFMT_I2S:
 149                 format = MAX98373_PCM_FORMAT_I2S;
 150                 break;
 151         case SND_SOC_DAIFMT_LEFT_J:
 152                 format = MAX98373_PCM_FORMAT_LJ;
 153                 break;
 154         case SND_SOC_DAIFMT_DSP_A:
 155                 format = MAX98373_PCM_FORMAT_TDM_MODE1;
 156                 break;
 157         case SND_SOC_DAIFMT_DSP_B:
 158                 format = MAX98373_PCM_FORMAT_TDM_MODE0;
 159                 break;
 160         default:
 161                 return -EINVAL;
 162         }
 163
 164         regmap_update_bits(max98373->regmap,
 165                            MAX98373_R2024_PCM_DATA_FMT_CFG,
 166                            MAX98373_PCM_MODE_CFG_FORMAT_MASK,
 167                            format << MAX98373_PCM_MODE_CFG_FORMAT_SHIFT);
 168
 169         return 0;
 170 }
 171
 172 /* BCLKs per LRCLK */
 173 static const int bclk_sel_table[] = {
 174         32, 48, 64, 96, 128, 192, 256, 384, 512, 320,
 175 };
 176
 177 static int max98373_get_bclk_sel(int bclk)
 178 {
 179         int i;
 180         /* match BCLKs per LRCLK */
 181         for (i = 0; i < ARRAY_SIZE(bclk_sel_table); i++) {
 182                 if (bclk_sel_table[i] == bclk)
 183                         return i + 2;
 184         }
 185         return 0;
 186 }
 187
 188 static int max98373_set_clock(struct snd_soc_component *component,
 189                               struct snd_pcm_hw_params *params)
 190 {
 191         struct max98373_priv *max98373 = snd_soc_component_get_drvdata(component);
 192         /* BCLK/LRCLK ratio calculation */
 193         int blr_clk_ratio = params_channels(params) * max98373->ch_size;
 194         int value;
 195
 196         if (!max98373->tdm_mode) {
 197                 /* BCLK configuration */
 198                 value = max98373_get_bclk_sel(blr_clk_ratio);
 199                 if (!value) {
 200                         dev_err(component->dev, "format unsupported %d\n",
 201                                 params_format(params));
 202                         return -EINVAL;
 203                 }
 204
 205                 regmap_update_bits(max98373->regmap,
 206                                    MAX98373_R2026_PCM_CLOCK_RATIO,
 207                                    MAX98373_PCM_CLK_SETUP_BSEL_MASK,
 208                                    value);
 209         }
 210         return 0;
 211 }
 212
 213 static int max98373_dai_hw_params(struct snd_pcm_substream *substream,
 214                                   struct snd_pcm_hw_params *params,
 215                                   struct snd_soc_dai *dai)
 216 {
 217         struct snd_soc_component *component = dai->component;
 218         struct max98373_priv *max98373 = snd_soc_component_get_drvdata(component);
 219         unsigned int sampling_rate = 0;
 220         unsigned int chan_sz = 0;
 221
 222         /* pcm mode configuration */
 223         switch (snd_pcm_format_width(params_format(params))) {
 224         case 16:
 225                 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_16;
 226                 break;
 227         case 24:
 228                 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_24;
 229                 break;
 230         case 32:
 231                 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_32;
 232                 break;
 233         default:
 234                 dev_err(component->dev, "format unsupported %d\n",
 235                         params_format(params));
 236                 goto err;
 237         }
 238
 239         max98373->ch_size = snd_pcm_format_width(params_format(params));
 240
 241         regmap_update_bits(max98373->regmap,
 242                            MAX98373_R2024_PCM_DATA_FMT_CFG,
 243                            MAX98373_PCM_MODE_CFG_CHANSZ_MASK, chan_sz);
 244
 245         dev_dbg(component->dev, "format supported %d",
 246                 params_format(params));
 247
 248         /* sampling rate configuration */
 249         switch (params_rate(params)) {
 250         case 8000:
 251                 sampling_rate = MAX98373_PCM_SR_SET1_SR_8000;
 252                 break;
 253         case 11025:
 254                 sampling_rate = MAX98373_PCM_SR_SET1_SR_11025;
 255                 break;
 256         case 12000:
 257                 sampling_rate = MAX98373_PCM_SR_SET1_SR_12000;
 258                 break;
 259         case 16000:
 260                 sampling_rate = MAX98373_PCM_SR_SET1_SR_16000;
 261                 break;
 262         case 22050:
 263                 sampling_rate = MAX98373_PCM_SR_SET1_SR_22050;
 264                 break;
 265         case 24000:
 266                 sampling_rate = MAX98373_PCM_SR_SET1_SR_24000;
 267                 break;
 268         case 32000:
 269                 sampling_rate = MAX98373_PCM_SR_SET1_SR_32000;
 270                 break;
 271         case 44100:
 272                 sampling_rate = MAX98373_PCM_SR_SET1_SR_44100;
 273                 break;
 274         case 48000:
 275                 sampling_rate = MAX98373_PCM_SR_SET1_SR_48000;
 276                 break;
 277         case 88200:
 278                 sampling_rate = MAX98373_PCM_SR_SET1_SR_88200;
 279                 break;
 280         case 96000:
 281                 sampling_rate = MAX98373_PCM_SR_SET1_SR_96000;
 282                 break;
 283         default:
 284                 dev_err(component->dev, "rate %d not supported\n",
 285                         params_rate(params));
 286                 goto err;
 287         }
 288
 289         /* set DAI_SR to correct LRCLK frequency */
 290         regmap_update_bits(max98373->regmap,
 291                            MAX98373_R2027_PCM_SR_SETUP_1,
 292                            MAX98373_PCM_SR_SET1_SR_MASK,
 293                            sampling_rate);
 294         regmap_update_bits(max98373->regmap,
 295                            MAX98373_R2028_PCM_SR_SETUP_2,
 296                            MAX98373_PCM_SR_SET2_SR_MASK,
 297                            sampling_rate << MAX98373_PCM_SR_SET2_SR_SHIFT);
 298
 299         /* set sampling rate of IV */
 300         if (max98373->interleave_mode &&
 301             sampling_rate > MAX98373_PCM_SR_SET1_SR_16000)
 302                 regmap_update_bits(max98373->regmap,
 303                                    MAX98373_R2028_PCM_SR_SETUP_2,
 304                                    MAX98373_PCM_SR_SET2_IVADC_SR_MASK,
 305                                    sampling_rate - 3);
 306         else
 307                 regmap_update_bits(max98373->regmap,
 308                                    MAX98373_R2028_PCM_SR_SETUP_2,
 309                                    MAX98373_PCM_SR_SET2_IVADC_SR_MASK,
 310                                    sampling_rate);
 311
 312         return max98373_set_clock(component, params);
 313 err:
 314         return -EINVAL;
 315 }
 316
 317 static int max98373_dai_tdm_slot(struct snd_soc_dai *dai,
 318                                  unsigned int tx_mask, unsigned int rx_mask,
 319                                  int slots, int slot_width)
 320 {
 321         struct snd_soc_component *component = dai->component;
 322         struct max98373_priv *max98373 = snd_soc_component_get_drvdata(component);
 323         int bsel = 0;
 324         unsigned int chan_sz = 0;
 325         unsigned int mask;
 326         int x, slot_found;
 327
 328         if (!tx_mask && !rx_mask && !slots && !slot_width)
 329                 max98373->tdm_mode = false;
 330         else
 331                 max98373->tdm_mode = true;
 332
 333         /* BCLK configuration */
 334         bsel = max98373_get_bclk_sel(slots * slot_width);
 335         if (bsel == 0) {
 336                 dev_err(component->dev, "BCLK %d not supported\n",
 337                         slots * slot_width);
 338                 return -EINVAL;
 339         }
 340
 341         regmap_update_bits(max98373->regmap,
 342                            MAX98373_R2026_PCM_CLOCK_RATIO,
 343                            MAX98373_PCM_CLK_SETUP_BSEL_MASK,
 344                            bsel);
 345
 346         /* Channel size configuration */
 347         switch (slot_width) {
 348         case 16:
 349                 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_16;
 350                 break;
 351         case 24:
 352                 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_24;
 353                 break;
 354         case 32:
 355                 chan_sz = MAX98373_PCM_MODE_CFG_CHANSZ_32;
 356                 break;
 357         default:
 358                 dev_err(component->dev, "format unsupported %d\n",
 359                         slot_width);
 360                 return -EINVAL;
 361         }
 362
 363         regmap_update_bits(max98373->regmap,
 364                            MAX98373_R2024_PCM_DATA_FMT_CFG,
 365                            MAX98373_PCM_MODE_CFG_CHANSZ_MASK, chan_sz);
 366
 367         /* Rx slot configuration */
 368         slot_found = 0;
 369         mask = rx_mask;
 370         for (x = 0 ; x < 16 ; x++, mask >>= 1) {
 371                 if (mask & 0x1) {
 372                         if (slot_found == 0)
 373                                 regmap_update_bits(max98373->regmap,
 374                                                    MAX98373_R2029_PCM_TO_SPK_MONO_MIX_1,
 375                                                    MAX98373_PCM_TO_SPK_CH0_SRC_MASK, x);
 376                         else
 377                                 regmap_write(max98373->regmap,
 378                                              MAX98373_R202A_PCM_TO_SPK_MONO_MIX_2,
 379                                              x);
 380                         slot_found++;
 381                         if (slot_found > 1)
 382                                 break;
 383                 }
 384         }
 385
 386         /* Tx slot Hi-Z configuration */
 387         regmap_write(max98373->regmap,
 388                      MAX98373_R2020_PCM_TX_HIZ_EN_1,
 389                      ~tx_mask & 0xFF);
 390         regmap_write(max98373->regmap,
 391                      MAX98373_R2021_PCM_TX_HIZ_EN_2,
 392                      (~tx_mask & 0xFF00) >> 8);
 393
 394         return 0;
 395 }
 396
 397 #define MAX98373_RATES SNDRV_PCM_RATE_8000_96000
 398
 399 #define MAX98373_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
 400         SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 401
 402 static const struct snd_soc_dai_ops max98373_dai_ops = {
 403         .set_fmt = max98373_dai_set_fmt,
 404         .hw_params = max98373_dai_hw_params,
 405         .set_tdm_slot = max98373_dai_tdm_slot,
 406 };
 407
 408 static bool max98373_readable_register(struct device *dev, unsigned int reg)
 409 {
 410         switch (reg) {
 411         case MAX98373_R2000_SW_RESET:
 412         case MAX98373_R2001_INT_RAW1 ... MAX98373_R200C_INT_EN3:
 413         case MAX98373_R2010_IRQ_CTRL:
 414         case MAX98373_R2014_THERM_WARN_THRESH
 415                 ... MAX98373_R2018_THERM_FOLDBACK_EN:
 416         case MAX98373_R201E_PIN_DRIVE_STRENGTH
 417                 ... MAX98373_R2036_SOUNDWIRE_CTRL:
 418         case MAX98373_R203D_AMP_DIG_VOL_CTRL ... MAX98373_R2043_AMP_EN:
 419         case MAX98373_R2046_IV_SENSE_ADC_DSP_CFG
 420                 ... MAX98373_R2047_IV_SENSE_ADC_EN:
 421         case MAX98373_R2051_MEAS_ADC_SAMPLING_RATE
 422                 ... MAX98373_R2056_MEAS_ADC_PVDD_CH_EN:
 423         case MAX98373_R2090_BDE_LVL_HOLD ... MAX98373_R2092_BDE_CLIPPER_MODE:
 424         case MAX98373_R2097_BDE_L1_THRESH
 425                 ... MAX98373_R209B_BDE_THRESH_HYST:
 426         case MAX98373_R20A8_BDE_L1_CFG_1 ... MAX98373_R20B3_BDE_L4_CFG_3:
 427         case MAX98373_R20B5_BDE_EN ... MAX98373_R20B6_BDE_CUR_STATE_READBACK:
 428         case MAX98373_R20D1_DHT_CFG ... MAX98373_R20D4_DHT_EN:
 429         case MAX98373_R20E0_LIMITER_THRESH_CFG ... MAX98373_R20E2_LIMITER_EN:
 430         case MAX98373_R20FE_DEVICE_AUTO_RESTART_CFG
 431                 ... MAX98373_R20FF_GLOBAL_SHDN:
 432         case MAX98373_R21FF_REV_ID:
 433                 return true;
 434         default:
 435                 return false;
 436         }
 437 };
 438
 439 static bool max98373_volatile_reg(struct device *dev, unsigned int reg)
 440 {
 441         switch (reg) {
 442         case MAX98373_R2000_SW_RESET ... MAX98373_R2009_INT_FLAG3:
 443         case MAX98373_R2054_MEAS_ADC_PVDD_CH_READBACK:
 444         case MAX98373_R2055_MEAS_ADC_THERM_CH_READBACK:
 445         case MAX98373_R20B6_BDE_CUR_STATE_READBACK:
 446         case MAX98373_R20FF_GLOBAL_SHDN:
 447         case MAX98373_R21FF_REV_ID:
 448                 return true;
 449         default:
 450                 return false;
 451         }
 452 }
 453
 454 static struct snd_soc_dai_driver max98373_dai[] = {
 455         {
 456                 .name = "max98373-aif1",
 457                 .playback = {
 458                         .stream_name = "HiFi Playback",
 459                         .channels_min = 1,
 460                         .channels_max = 2,
 461                         .rates = MAX98373_RATES,
 462                         .formats = MAX98373_FORMATS,
 463                 },
 464                 .capture = {
 465                         .stream_name = "HiFi Capture",
 466                         .channels_min = 1,
 467                         .channels_max = 2,
 468                         .rates = MAX98373_RATES,
 469                         .formats = MAX98373_FORMATS,
 470                 },
 471                 .ops = &max98373_dai_ops,
 472         }
 473 };
 474
 475 #ifdef CONFIG_PM_SLEEP
 476 static int max98373_suspend(struct device *dev)
 477 {
 478         struct max98373_priv *max98373 = dev_get_drvdata(dev);
 479         int i;
 480
 481         /* cache feedback register values before suspend */
 482         for (i = 0; i < max98373->cache_num; i++)
 483                 regmap_read(max98373->regmap, max98373->cache[i].reg, &max98373->cache[i].val);
 484
 485         regcache_cache_only(max98373->regmap, true);
 486         regcache_mark_dirty(max98373->regmap);
 487         return 0;
 488 }
 489
 490 static int max98373_resume(struct device *dev)
 491 {
 492         struct max98373_priv *max98373 = dev_get_drvdata(dev);
 493
 494         regcache_cache_only(max98373->regmap, false);
 495         max98373_reset(max98373, dev);
 496         regcache_sync(max98373->regmap);
 497         return 0;
 498 }
 499 #endif
 500
 501 static const struct dev_pm_ops max98373_pm = {
 502         SET_SYSTEM_SLEEP_PM_OPS(max98373_suspend, max98373_resume)
 503 };
 504
 505 static const struct regmap_config max98373_regmap = {
 506         .reg_bits = 16,
 507         .val_bits = 8,
 508         .max_register = MAX98373_R21FF_REV_ID,
 509         .reg_defaults  = max98373_reg,
 510         .num_reg_defaults = ARRAY_SIZE(max98373_reg),
 511         .readable_reg = max98373_readable_register,
 512         .volatile_reg = max98373_volatile_reg,
 513         .cache_type = REGCACHE_RBTREE,
 514 };
 515
 516 static int max98373_i2c_probe(struct i2c_client *i2c)
 517 {
 518         int ret = 0;
 519         int reg = 0;
 520         int i;
 521         struct max98373_priv *max98373 = NULL;
 522
 523         max98373 = devm_kzalloc(&i2c->dev, sizeof(*max98373), GFP_KERNEL);
 524
 525         if (!max98373) {
 526                 ret = -ENOMEM;
 527                 return ret;
 528         }
 529         i2c_set_clientdata(i2c, max98373);
 530
 531         /* update interleave mode info */
 532         if (device_property_read_bool(&i2c->dev, "maxim,interleave_mode"))
 533                 max98373->interleave_mode = true;
 534         else
 535                 max98373->interleave_mode = false;
 536
 537         /* regmap initialization */
 538         max98373->regmap = devm_regmap_init_i2c(i2c, &max98373_regmap);
 539         if (IS_ERR(max98373->regmap)) {
 540                 ret = PTR_ERR(max98373->regmap);
 541                 dev_err(&i2c->dev,
 542                         "Failed to allocate regmap: %d\n", ret);
 543                 return ret;
 544         }
 545
 546         max98373->cache_num = ARRAY_SIZE(max98373_i2c_cache_reg);
 547         max98373->cache = devm_kcalloc(&i2c->dev, max98373->cache_num,
 548                                        sizeof(*max98373->cache),
 549                                        GFP_KERNEL);
 550         if (!max98373->cache) {
 551                 ret = -ENOMEM;
 552                 return ret;
 553         }
 554
 555         for (i = 0; i < max98373->cache_num; i++)
 556                 max98373->cache[i].reg = max98373_i2c_cache_reg[i];
 557
 558         /* voltage/current slot & gpio configuration */
 559         max98373_slot_config(&i2c->dev, max98373);
 560
 561         /* Check Revision ID */
 562         ret = regmap_read(max98373->regmap,
 563                           MAX98373_R21FF_REV_ID, &reg);
 564         if (ret < 0) {
 565                 dev_err(&i2c->dev,
 566                         "Failed to read: 0x%02X\n", MAX98373_R21FF_REV_ID);
 567                 return ret;
 568         }
 569         dev_info(&i2c->dev, "MAX98373 revisionID: 0x%02X\n", reg);
 570
 571         /* codec registration */
 572         ret = devm_snd_soc_register_component(&i2c->dev, &soc_codec_dev_max98373,
 573                                               max98373_dai, ARRAY_SIZE(max98373_dai));
 574         if (ret < 0)
 575                 dev_err(&i2c->dev, "Failed to register codec: %d\n", ret);
 576
 577         return ret;
 578 }
 579
 580 static const struct i2c_device_id max98373_i2c_id[] = {
 581         { "max98373"},
 582         { },
 583 };
 584
 585 MODULE_DEVICE_TABLE(i2c, max98373_i2c_id);
 586
 587 #if defined(CONFIG_OF)
 588 static const struct of_device_id max98373_of_match[] = {
 589         { .compatible = "maxim,max98373", },
 590         { }
 591 };
 592 MODULE_DEVICE_TABLE(of, max98373_of_match);
 593 #endif
 594
 595 #ifdef CONFIG_ACPI
 596 static const struct acpi_device_id max98373_acpi_match[] = {
 597         { "MX98373", 0 },
 598         {},
 599 };
 600 MODULE_DEVICE_TABLE(acpi, max98373_acpi_match);
 601 #endif
 602
 603 static struct i2c_driver max98373_i2c_driver = {
 604         .driver = {
 605                 .name = "max98373",
 606                 .of_match_table = of_match_ptr(max98373_of_match),
 607                 .acpi_match_table = ACPI_PTR(max98373_acpi_match),
 608                 .pm = &max98373_pm,
 609         },
 610         .probe = max98373_i2c_probe,
 611         .id_table = max98373_i2c_id,
 612 };
 613
 614 module_i2c_driver(max98373_i2c_driver)
 615
 616 MODULE_DESCRIPTION("ALSA SoC MAX98373 driver");
 617 MODULE_AUTHOR("Ryan Lee <ryans.lee@maximintegrated.com>");
 618 MODULE_LICENSE("GPL");