1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * wm8731.c -- WM8731 ALSA SoC Audio driver 4 * 5 * Copyright 2005 Openedhand Ltd. 6 * Copyright 2006-12 Wolfson Microelectronics, plc 7 * 8 * Author: Richard Purdie <richard@openedhand.com> 9 * 10 * Based on wm8753.c by Liam Girdwood 11 */ 12 13 #include <linux/cleanup.h> 14 #include <linux/module.h> 15 #include <linux/moduleparam.h> 16 #include <linux/init.h> 17 #include <linux/delay.h> 18 #include <linux/pm.h> 19 #include <linux/slab.h> 20 #include <linux/regmap.h> 21 #include <linux/regulator/consumer.h> 22 #include <linux/clk.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/soc.h> 27 #include <sound/initval.h> 28 #include <sound/tlv.h> 29 30 #include "wm8731.h" 31 32 static const char *wm8731_supply_names[WM8731_NUM_SUPPLIES] = { 33 "AVDD", 34 "HPVDD", 35 "DCVDD", 36 "DBVDD", 37 }; 38 39 /* 40 * wm8731 register cache 41 */ 42 static const struct reg_default wm8731_reg_defaults[] = { 43 { 0, 0x0097 }, 44 { 1, 0x0097 }, 45 { 2, 0x0079 }, 46 { 3, 0x0079 }, 47 { 4, 0x000a }, 48 { 5, 0x0008 }, 49 { 6, 0x009f }, 50 { 7, 0x000a }, 51 { 8, 0x0000 }, 52 { 9, 0x0000 }, 53 }; 54 55 static bool wm8731_volatile(struct device *dev, unsigned int reg) 56 { 57 return reg == WM8731_RESET; 58 } 59 60 #define wm8731_reset(m) regmap_write(m, WM8731_RESET, 0) 61 62 static const char *wm8731_input_select[] = {"Line In", "Mic"}; 63 64 static SOC_ENUM_SINGLE_DECL(wm8731_insel_enum, 65 WM8731_APANA, 2, wm8731_input_select); 66 67 static int wm8731_deemph[] = { 0, 32000, 44100, 48000 }; 68 69 static int wm8731_set_deemph(struct snd_soc_component *component) 70 { 71 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 72 int val, i, best; 73 74 /* If we're using deemphasis select the nearest available sample 75 * rate. 76 */ 77 if (wm8731->deemph) { 78 best = 1; 79 for (i = 2; i < ARRAY_SIZE(wm8731_deemph); i++) { 80 if (abs(wm8731_deemph[i] - wm8731->playback_fs) < 81 abs(wm8731_deemph[best] - wm8731->playback_fs)) 82 best = i; 83 } 84 85 val = best << 1; 86 } else { 87 best = 0; 88 val = 0; 89 } 90 91 dev_dbg(component->dev, "Set deemphasis %d (%dHz)\n", 92 best, wm8731_deemph[best]); 93 94 return snd_soc_component_update_bits(component, WM8731_APDIGI, 0x6, val); 95 } 96 97 static int wm8731_get_deemph(struct snd_kcontrol *kcontrol, 98 struct snd_ctl_elem_value *ucontrol) 99 { 100 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 101 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 102 103 ucontrol->value.integer.value[0] = wm8731->deemph; 104 105 return 0; 106 } 107 108 static int wm8731_put_deemph(struct snd_kcontrol *kcontrol, 109 struct snd_ctl_elem_value *ucontrol) 110 { 111 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 112 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 113 unsigned int deemph = ucontrol->value.integer.value[0]; 114 115 if (deemph > 1) 116 return -EINVAL; 117 118 guard(mutex)(&wm8731->lock); 119 if (wm8731->deemph != deemph) { 120 wm8731->deemph = deemph; 121 122 wm8731_set_deemph(component); 123 124 return 1; 125 } 126 127 return 0; 128 } 129 130 static const DECLARE_TLV_DB_SCALE(in_tlv, -3450, 150, 0); 131 static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -1500, 300, 0); 132 static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1); 133 static const DECLARE_TLV_DB_SCALE(mic_tlv, 0, 2000, 0); 134 135 static const struct snd_kcontrol_new wm8731_snd_controls[] = { 136 137 SOC_DOUBLE_R_TLV("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V, 138 0, 127, 0, out_tlv), 139 SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V, 140 7, 1, 0), 141 142 SOC_DOUBLE_R_TLV("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0, 143 in_tlv), 144 SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1), 145 146 SOC_SINGLE_TLV("Mic Boost Volume", WM8731_APANA, 0, 1, 0, mic_tlv), 147 SOC_SINGLE("Mic Capture Switch", WM8731_APANA, 1, 1, 1), 148 149 SOC_SINGLE_TLV("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1, 150 sidetone_tlv), 151 152 SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1), 153 SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0), 154 155 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 156 wm8731_get_deemph, wm8731_put_deemph), 157 }; 158 159 /* Output Mixer */ 160 static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = { 161 SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0), 162 SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0), 163 SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0), 164 }; 165 166 /* Input mux */ 167 static const struct snd_kcontrol_new wm8731_input_mux_controls = 168 SOC_DAPM_ENUM("Input Select", wm8731_insel_enum); 169 170 static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = { 171 SND_SOC_DAPM_SUPPLY("ACTIVE",WM8731_ACTIVE, 0, 0, NULL, 0), 172 SND_SOC_DAPM_SUPPLY("OSC", WM8731_PWR, 5, 1, NULL, 0), 173 SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1, 174 &wm8731_output_mixer_controls[0], 175 ARRAY_SIZE(wm8731_output_mixer_controls)), 176 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1), 177 SND_SOC_DAPM_OUTPUT("LOUT"), 178 SND_SOC_DAPM_OUTPUT("LHPOUT"), 179 SND_SOC_DAPM_OUTPUT("ROUT"), 180 SND_SOC_DAPM_OUTPUT("RHPOUT"), 181 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1), 182 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls), 183 SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0), 184 SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1), 185 SND_SOC_DAPM_INPUT("MICIN"), 186 SND_SOC_DAPM_INPUT("RLINEIN"), 187 SND_SOC_DAPM_INPUT("LLINEIN"), 188 }; 189 190 static int wm8731_check_osc(struct snd_soc_dapm_widget *source, 191 struct snd_soc_dapm_widget *sink) 192 { 193 struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm); 194 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 195 196 return wm8731->sysclk_type == WM8731_SYSCLK_XTAL; 197 } 198 199 static const struct snd_soc_dapm_route wm8731_intercon[] = { 200 {"DAC", NULL, "OSC", wm8731_check_osc}, 201 {"ADC", NULL, "OSC", wm8731_check_osc}, 202 {"DAC", NULL, "ACTIVE"}, 203 {"ADC", NULL, "ACTIVE"}, 204 205 /* output mixer */ 206 {"Output Mixer", "Line Bypass Switch", "Line Input"}, 207 {"Output Mixer", "HiFi Playback Switch", "DAC"}, 208 {"Output Mixer", "Mic Sidetone Switch", "Mic Bias"}, 209 210 /* outputs */ 211 {"RHPOUT", NULL, "Output Mixer"}, 212 {"ROUT", NULL, "Output Mixer"}, 213 {"LHPOUT", NULL, "Output Mixer"}, 214 {"LOUT", NULL, "Output Mixer"}, 215 216 /* input mux */ 217 {"Input Mux", "Line In", "Line Input"}, 218 {"Input Mux", "Mic", "Mic Bias"}, 219 {"ADC", NULL, "Input Mux"}, 220 221 /* inputs */ 222 {"Line Input", NULL, "LLINEIN"}, 223 {"Line Input", NULL, "RLINEIN"}, 224 {"Mic Bias", NULL, "MICIN"}, 225 }; 226 227 struct _coeff_div { 228 u32 mclk; 229 u32 rate; 230 u16 fs; 231 u8 sr:4; 232 u8 bosr:1; 233 u8 usb:1; 234 }; 235 236 /* codec mclk clock divider coefficients */ 237 static const struct _coeff_div coeff_div[] = { 238 /* 48k */ 239 {12288000, 48000, 256, 0x0, 0x0, 0x0}, 240 {18432000, 48000, 384, 0x0, 0x1, 0x0}, 241 {12000000, 48000, 250, 0x0, 0x0, 0x1}, 242 243 /* 32k */ 244 {12288000, 32000, 384, 0x6, 0x0, 0x0}, 245 {18432000, 32000, 576, 0x6, 0x1, 0x0}, 246 {12000000, 32000, 375, 0x6, 0x0, 0x1}, 247 248 /* 8k */ 249 {12288000, 8000, 1536, 0x3, 0x0, 0x0}, 250 {18432000, 8000, 2304, 0x3, 0x1, 0x0}, 251 {11289600, 8000, 1408, 0xb, 0x0, 0x0}, 252 {16934400, 8000, 2112, 0xb, 0x1, 0x0}, 253 {12000000, 8000, 1500, 0x3, 0x0, 0x1}, 254 255 /* 96k */ 256 {12288000, 96000, 128, 0x7, 0x0, 0x0}, 257 {18432000, 96000, 192, 0x7, 0x1, 0x0}, 258 {12000000, 96000, 125, 0x7, 0x0, 0x1}, 259 260 /* 44.1k */ 261 {11289600, 44100, 256, 0x8, 0x0, 0x0}, 262 {16934400, 44100, 384, 0x8, 0x1, 0x0}, 263 {12000000, 44100, 272, 0x8, 0x1, 0x1}, 264 265 /* 88.2k */ 266 {11289600, 88200, 128, 0xf, 0x0, 0x0}, 267 {16934400, 88200, 192, 0xf, 0x1, 0x0}, 268 {12000000, 88200, 136, 0xf, 0x1, 0x1}, 269 }; 270 271 /* rates constraints */ 272 static const unsigned int wm8731_rates_12000000[] = { 273 8000, 32000, 44100, 48000, 96000, 88200, 274 }; 275 276 static const unsigned int wm8731_rates_12288000_18432000[] = { 277 8000, 32000, 48000, 96000, 278 }; 279 280 static const unsigned int wm8731_rates_11289600_16934400[] = { 281 8000, 44100, 88200, 282 }; 283 284 static const struct snd_pcm_hw_constraint_list wm8731_constraints_12000000 = { 285 .list = wm8731_rates_12000000, 286 .count = ARRAY_SIZE(wm8731_rates_12000000), 287 }; 288 289 static const 290 struct snd_pcm_hw_constraint_list wm8731_constraints_12288000_18432000 = { 291 .list = wm8731_rates_12288000_18432000, 292 .count = ARRAY_SIZE(wm8731_rates_12288000_18432000), 293 }; 294 295 static const 296 struct snd_pcm_hw_constraint_list wm8731_constraints_11289600_16934400 = { 297 .list = wm8731_rates_11289600_16934400, 298 .count = ARRAY_SIZE(wm8731_rates_11289600_16934400), 299 }; 300 301 static inline int get_coeff(int mclk, int rate) 302 { 303 int i; 304 305 for (i = 0; i < ARRAY_SIZE(coeff_div); i++) { 306 if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk) 307 return i; 308 } 309 return 0; 310 } 311 312 static int wm8731_hw_params(struct snd_pcm_substream *substream, 313 struct snd_pcm_hw_params *params, 314 struct snd_soc_dai *dai) 315 { 316 struct snd_soc_component *component = dai->component; 317 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 318 u16 iface = snd_soc_component_read(component, WM8731_IFACE) & 0xfff3; 319 int i = get_coeff(wm8731->sysclk, params_rate(params)); 320 u16 srate = (coeff_div[i].sr << 2) | 321 (coeff_div[i].bosr << 1) | coeff_div[i].usb; 322 323 wm8731->playback_fs = params_rate(params); 324 325 snd_soc_component_write(component, WM8731_SRATE, srate); 326 327 /* bit size */ 328 switch (params_width(params)) { 329 case 16: 330 break; 331 case 20: 332 iface |= 0x0004; 333 break; 334 case 24: 335 iface |= 0x0008; 336 break; 337 case 32: 338 iface |= 0x000c; 339 break; 340 } 341 342 wm8731_set_deemph(component); 343 344 snd_soc_component_write(component, WM8731_IFACE, iface); 345 return 0; 346 } 347 348 static int wm8731_mute(struct snd_soc_dai *dai, int mute, int direction) 349 { 350 struct snd_soc_component *component = dai->component; 351 u16 mute_reg = snd_soc_component_read(component, WM8731_APDIGI) & 0xfff7; 352 353 if (mute) 354 snd_soc_component_write(component, WM8731_APDIGI, mute_reg | 0x8); 355 else 356 snd_soc_component_write(component, WM8731_APDIGI, mute_reg); 357 return 0; 358 } 359 360 static int wm8731_set_dai_sysclk(struct snd_soc_dai *codec_dai, 361 int clk_id, unsigned int freq, int dir) 362 { 363 struct snd_soc_component *component = codec_dai->component; 364 struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component); 365 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 366 367 switch (clk_id) { 368 case WM8731_SYSCLK_XTAL: 369 case WM8731_SYSCLK_MCLK: 370 if (wm8731->mclk && clk_set_rate(wm8731->mclk, freq)) 371 return -EINVAL; 372 wm8731->sysclk_type = clk_id; 373 break; 374 default: 375 return -EINVAL; 376 } 377 378 switch (freq) { 379 case 0: 380 wm8731->constraints = NULL; 381 break; 382 case 12000000: 383 wm8731->constraints = &wm8731_constraints_12000000; 384 break; 385 case 12288000: 386 case 18432000: 387 wm8731->constraints = &wm8731_constraints_12288000_18432000; 388 break; 389 case 16934400: 390 case 11289600: 391 wm8731->constraints = &wm8731_constraints_11289600_16934400; 392 break; 393 default: 394 return -EINVAL; 395 } 396 397 wm8731->sysclk = freq; 398 399 snd_soc_dapm_sync(dapm); 400 401 return 0; 402 } 403 404 405 static int wm8731_set_dai_fmt(struct snd_soc_dai *codec_dai, 406 unsigned int fmt) 407 { 408 struct snd_soc_component *component = codec_dai->component; 409 u16 iface = 0; 410 411 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 412 case SND_SOC_DAIFMT_CBP_CFP: 413 iface |= 0x0040; 414 break; 415 case SND_SOC_DAIFMT_CBC_CFC: 416 break; 417 default: 418 return -EINVAL; 419 } 420 421 /* interface format */ 422 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 423 case SND_SOC_DAIFMT_I2S: 424 iface |= 0x0002; 425 break; 426 case SND_SOC_DAIFMT_RIGHT_J: 427 break; 428 case SND_SOC_DAIFMT_LEFT_J: 429 iface |= 0x0001; 430 break; 431 case SND_SOC_DAIFMT_DSP_A: 432 iface |= 0x0013; 433 break; 434 case SND_SOC_DAIFMT_DSP_B: 435 iface |= 0x0003; 436 break; 437 default: 438 return -EINVAL; 439 } 440 441 /* clock inversion */ 442 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 443 case SND_SOC_DAIFMT_NB_NF: 444 break; 445 case SND_SOC_DAIFMT_IB_IF: 446 iface |= 0x0090; 447 break; 448 case SND_SOC_DAIFMT_IB_NF: 449 iface |= 0x0080; 450 break; 451 case SND_SOC_DAIFMT_NB_IF: 452 iface |= 0x0010; 453 break; 454 default: 455 return -EINVAL; 456 } 457 458 /* set iface */ 459 snd_soc_component_write(component, WM8731_IFACE, iface); 460 return 0; 461 } 462 463 static int wm8731_set_bias_level(struct snd_soc_component *component, 464 enum snd_soc_bias_level level) 465 { 466 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(component); 467 struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component); 468 int ret; 469 u16 reg; 470 471 switch (level) { 472 case SND_SOC_BIAS_ON: 473 ret = clk_prepare_enable(wm8731->mclk); 474 if (ret) 475 return ret; 476 break; 477 case SND_SOC_BIAS_PREPARE: 478 break; 479 case SND_SOC_BIAS_STANDBY: 480 if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_OFF) { 481 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 482 wm8731->supplies); 483 if (ret != 0) 484 return ret; 485 486 regcache_sync(wm8731->regmap); 487 } 488 489 /* Clear PWROFF, gate CLKOUT, everything else as-is */ 490 reg = snd_soc_component_read(component, WM8731_PWR) & 0xff7f; 491 snd_soc_component_write(component, WM8731_PWR, reg | 0x0040); 492 break; 493 case SND_SOC_BIAS_OFF: 494 clk_disable_unprepare(wm8731->mclk); 495 snd_soc_component_write(component, WM8731_PWR, 0xffff); 496 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), 497 wm8731->supplies); 498 regcache_mark_dirty(wm8731->regmap); 499 break; 500 } 501 return 0; 502 } 503 504 static int wm8731_startup(struct snd_pcm_substream *substream, 505 struct snd_soc_dai *dai) 506 { 507 struct wm8731_priv *wm8731 = snd_soc_component_get_drvdata(dai->component); 508 509 if (wm8731->constraints) 510 snd_pcm_hw_constraint_list(substream->runtime, 0, 511 SNDRV_PCM_HW_PARAM_RATE, 512 wm8731->constraints); 513 514 return 0; 515 } 516 517 #define WM8731_RATES SNDRV_PCM_RATE_8000_96000 518 519 #define WM8731_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 520 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 521 522 static const struct snd_soc_dai_ops wm8731_dai_ops = { 523 .startup = wm8731_startup, 524 .hw_params = wm8731_hw_params, 525 .mute_stream = wm8731_mute, 526 .set_sysclk = wm8731_set_dai_sysclk, 527 .set_fmt = wm8731_set_dai_fmt, 528 .no_capture_mute = 1, 529 }; 530 531 static struct snd_soc_dai_driver wm8731_dai = { 532 .name = "wm8731-hifi", 533 .playback = { 534 .stream_name = "Playback", 535 .channels_min = 1, 536 .channels_max = 2, 537 .rates = WM8731_RATES, 538 .formats = WM8731_FORMATS,}, 539 .capture = { 540 .stream_name = "Capture", 541 .channels_min = 1, 542 .channels_max = 2, 543 .rates = WM8731_RATES, 544 .formats = WM8731_FORMATS,}, 545 .ops = &wm8731_dai_ops, 546 .symmetric_rate = 1, 547 }; 548 549 static const struct snd_soc_component_driver soc_component_dev_wm8731 = { 550 .set_bias_level = wm8731_set_bias_level, 551 .controls = wm8731_snd_controls, 552 .num_controls = ARRAY_SIZE(wm8731_snd_controls), 553 .dapm_widgets = wm8731_dapm_widgets, 554 .num_dapm_widgets = ARRAY_SIZE(wm8731_dapm_widgets), 555 .dapm_routes = wm8731_intercon, 556 .num_dapm_routes = ARRAY_SIZE(wm8731_intercon), 557 .suspend_bias_off = 1, 558 .idle_bias_on = 1, 559 .use_pmdown_time = 1, 560 .endianness = 1, 561 }; 562 563 int wm8731_init(struct device *dev, struct wm8731_priv *wm8731) 564 { 565 int ret = 0, i; 566 567 wm8731->mclk = devm_clk_get(dev, "mclk"); 568 if (IS_ERR(wm8731->mclk)) { 569 ret = PTR_ERR(wm8731->mclk); 570 if (ret == -ENOENT) { 571 wm8731->mclk = NULL; 572 dev_warn(dev, "Assuming static MCLK\n"); 573 } else { 574 dev_err(dev, "Failed to get MCLK: %d\n", ret); 575 return ret; 576 } 577 } 578 579 mutex_init(&wm8731->lock); 580 581 for (i = 0; i < ARRAY_SIZE(wm8731->supplies); i++) 582 wm8731->supplies[i].supply = wm8731_supply_names[i]; 583 584 ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(wm8731->supplies), 585 wm8731->supplies); 586 if (ret != 0) { 587 dev_err(dev, "Failed to request supplies: %d\n", ret); 588 return ret; 589 } 590 591 ret = regulator_bulk_enable(ARRAY_SIZE(wm8731->supplies), 592 wm8731->supplies); 593 if (ret != 0) { 594 dev_err(dev, "Failed to enable supplies: %d\n", ret); 595 return ret; 596 } 597 598 ret = wm8731_reset(wm8731->regmap); 599 if (ret < 0) { 600 dev_err(dev, "Failed to issue reset: %d\n", ret); 601 goto err_regulator_enable; 602 } 603 604 /* Clear POWEROFF, keep everything else disabled */ 605 regmap_write(wm8731->regmap, WM8731_PWR, 0x7f); 606 607 /* Latch the update bits */ 608 regmap_update_bits(wm8731->regmap, WM8731_LOUT1V, 0x100, 0); 609 regmap_update_bits(wm8731->regmap, WM8731_ROUT1V, 0x100, 0); 610 regmap_update_bits(wm8731->regmap, WM8731_LINVOL, 0x100, 0); 611 regmap_update_bits(wm8731->regmap, WM8731_RINVOL, 0x100, 0); 612 613 /* Disable bypass path by default */ 614 regmap_update_bits(wm8731->regmap, WM8731_APANA, 0x8, 0); 615 616 regcache_mark_dirty(wm8731->regmap); 617 618 ret = devm_snd_soc_register_component(dev, 619 &soc_component_dev_wm8731, &wm8731_dai, 1); 620 if (ret != 0) { 621 dev_err(dev, "Failed to register CODEC: %d\n", ret); 622 goto err_regulator_enable; 623 } 624 625 return 0; 626 627 err_regulator_enable: 628 /* Regulators will be enabled by bias management */ 629 regulator_bulk_disable(ARRAY_SIZE(wm8731->supplies), wm8731->supplies); 630 631 return ret; 632 } 633 EXPORT_SYMBOL_GPL(wm8731_init); 634 635 const struct regmap_config wm8731_regmap = { 636 .reg_bits = 7, 637 .val_bits = 9, 638 639 .max_register = WM8731_RESET, 640 .volatile_reg = wm8731_volatile, 641 642 .cache_type = REGCACHE_MAPLE, 643 .reg_defaults = wm8731_reg_defaults, 644 .num_reg_defaults = ARRAY_SIZE(wm8731_reg_defaults), 645 }; 646 EXPORT_SYMBOL_GPL(wm8731_regmap); 647 648 MODULE_DESCRIPTION("ASoC WM8731 driver"); 649 MODULE_AUTHOR("Richard Purdie"); 650 MODULE_LICENSE("GPL"); 651