1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Audio driver for AK4458 DAC 4 // 5 // Copyright (C) 2016 Asahi Kasei Microdevices Corporation 6 // Copyright 2018 NXP 7 8 #include <linux/delay.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/i2c.h> 11 #include <linux/module.h> 12 #include <linux/of_device.h> 13 #include <linux/of_gpio.h> 14 #include <linux/pm_runtime.h> 15 #include <linux/slab.h> 16 #include <sound/initval.h> 17 #include <sound/pcm_params.h> 18 #include <sound/soc.h> 19 #include <sound/soc-dapm.h> 20 #include <sound/tlv.h> 21 22 #include "ak4458.h" 23 24 /* AK4458 Codec Private Data */ 25 struct ak4458_priv { 26 struct device *dev; 27 struct regmap *regmap; 28 struct gpio_desc *reset_gpiod; 29 struct gpio_desc *mute_gpiod; 30 int digfil; /* SSLOW, SD, SLOW bits */ 31 int fs; /* sampling rate */ 32 int fmt; 33 int slots; 34 int slot_width; 35 }; 36 37 static const struct reg_default ak4458_reg_defaults[] = { 38 { 0x00, 0x0C }, /* 0x00 AK4458_00_CONTROL1 */ 39 { 0x01, 0x22 }, /* 0x01 AK4458_01_CONTROL2 */ 40 { 0x02, 0x00 }, /* 0x02 AK4458_02_CONTROL3 */ 41 { 0x03, 0xFF }, /* 0x03 AK4458_03_LCHATT */ 42 { 0x04, 0xFF }, /* 0x04 AK4458_04_RCHATT */ 43 { 0x05, 0x00 }, /* 0x05 AK4458_05_CONTROL4 */ 44 { 0x06, 0x00 }, /* 0x06 AK4458_06_DSD1 */ 45 { 0x07, 0x03 }, /* 0x07 AK4458_07_CONTROL5 */ 46 { 0x08, 0x00 }, /* 0x08 AK4458_08_SOUND_CONTROL */ 47 { 0x09, 0x00 }, /* 0x09 AK4458_09_DSD2 */ 48 { 0x0A, 0x0D }, /* 0x0A AK4458_0A_CONTROL6 */ 49 { 0x0B, 0x0C }, /* 0x0B AK4458_0B_CONTROL7 */ 50 { 0x0C, 0x00 }, /* 0x0C AK4458_0C_CONTROL8 */ 51 { 0x0D, 0x00 }, /* 0x0D AK4458_0D_CONTROL9 */ 52 { 0x0E, 0x50 }, /* 0x0E AK4458_0E_CONTROL10 */ 53 { 0x0F, 0xFF }, /* 0x0F AK4458_0F_L2CHATT */ 54 { 0x10, 0xFF }, /* 0x10 AK4458_10_R2CHATT */ 55 { 0x11, 0xFF }, /* 0x11 AK4458_11_L3CHATT */ 56 { 0x12, 0xFF }, /* 0x12 AK4458_12_R3CHATT */ 57 { 0x13, 0xFF }, /* 0x13 AK4458_13_L4CHATT */ 58 { 0x14, 0xFF }, /* 0x14 AK4458_14_R4CHATT */ 59 }; 60 61 /* 62 * Volume control: 63 * from -127 to 0 dB in 0.5 dB steps (mute instead of -127.5 dB) 64 */ 65 static DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1); 66 67 /* 68 * DEM1 bit DEM0 bit Mode 69 * 0 0 44.1kHz 70 * 0 1 OFF (default) 71 * 1 0 48kHz 72 * 1 1 32kHz 73 */ 74 static const char * const ak4458_dem_select_texts[] = { 75 "44.1kHz", "OFF", "48kHz", "32kHz" 76 }; 77 78 /* 79 * SSLOW, SD, SLOW bits Digital Filter Setting 80 * 0, 0, 0 : Sharp Roll-Off Filter 81 * 0, 0, 1 : Slow Roll-Off Filter 82 * 0, 1, 0 : Short delay Sharp Roll-Off Filter 83 * 0, 1, 1 : Short delay Slow Roll-Off Filter 84 * 1, *, * : Super Slow Roll-Off Filter 85 */ 86 static const char * const ak4458_digfil_select_texts[] = { 87 "Sharp Roll-Off Filter", 88 "Slow Roll-Off Filter", 89 "Short delay Sharp Roll-Off Filter", 90 "Short delay Slow Roll-Off Filter", 91 "Super Slow Roll-Off Filter" 92 }; 93 94 /* 95 * DZFB: Inverting Enable of DZF 96 * 0: DZF goes H at Zero Detection 97 * 1: DZF goes L at Zero Detection 98 */ 99 static const char * const ak4458_dzfb_select_texts[] = {"H", "L"}; 100 101 /* 102 * SC1-0 bits: Sound Mode Setting 103 * 0 0 : Sound Mode 0 104 * 0 1 : Sound Mode 1 105 * 1 0 : Sound Mode 2 106 * 1 1 : Reserved 107 */ 108 static const char * const ak4458_sc_select_texts[] = { 109 "Sound Mode 0", "Sound Mode 1", "Sound Mode 2" 110 }; 111 112 /* FIR2-0 bits: FIR Filter Mode Setting */ 113 static const char * const ak4458_fir_select_texts[] = { 114 "Mode 0", "Mode 1", "Mode 2", "Mode 3", 115 "Mode 4", "Mode 5", "Mode 6", "Mode 7", 116 }; 117 118 /* ATS1-0 bits Attenuation Speed */ 119 static const char * const ak4458_ats_select_texts[] = { 120 "4080/fs", "2040/fs", "510/fs", "255/fs", 121 }; 122 123 /* DIF2 bit Audio Interface Format Setting(BICK fs) */ 124 static const char * const ak4458_dif_select_texts[] = {"32fs,48fs", "64fs",}; 125 126 static const struct soc_enum ak4458_dac1_dem_enum = 127 SOC_ENUM_SINGLE(AK4458_01_CONTROL2, 1, 128 ARRAY_SIZE(ak4458_dem_select_texts), 129 ak4458_dem_select_texts); 130 static const struct soc_enum ak4458_dac2_dem_enum = 131 SOC_ENUM_SINGLE(AK4458_0A_CONTROL6, 0, 132 ARRAY_SIZE(ak4458_dem_select_texts), 133 ak4458_dem_select_texts); 134 static const struct soc_enum ak4458_dac3_dem_enum = 135 SOC_ENUM_SINGLE(AK4458_0E_CONTROL10, 4, 136 ARRAY_SIZE(ak4458_dem_select_texts), 137 ak4458_dem_select_texts); 138 static const struct soc_enum ak4458_dac4_dem_enum = 139 SOC_ENUM_SINGLE(AK4458_0E_CONTROL10, 6, 140 ARRAY_SIZE(ak4458_dem_select_texts), 141 ak4458_dem_select_texts); 142 static const struct soc_enum ak4458_digfil_enum = 143 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(ak4458_digfil_select_texts), 144 ak4458_digfil_select_texts); 145 static const struct soc_enum ak4458_dzfb_enum = 146 SOC_ENUM_SINGLE(AK4458_02_CONTROL3, 2, 147 ARRAY_SIZE(ak4458_dzfb_select_texts), 148 ak4458_dzfb_select_texts); 149 static const struct soc_enum ak4458_sm_enum = 150 SOC_ENUM_SINGLE(AK4458_08_SOUND_CONTROL, 0, 151 ARRAY_SIZE(ak4458_sc_select_texts), 152 ak4458_sc_select_texts); 153 static const struct soc_enum ak4458_fir_enum = 154 SOC_ENUM_SINGLE(AK4458_0C_CONTROL8, 0, 155 ARRAY_SIZE(ak4458_fir_select_texts), 156 ak4458_fir_select_texts); 157 static const struct soc_enum ak4458_ats_enum = 158 SOC_ENUM_SINGLE(AK4458_0B_CONTROL7, 6, 159 ARRAY_SIZE(ak4458_ats_select_texts), 160 ak4458_ats_select_texts); 161 static const struct soc_enum ak4458_dif_enum = 162 SOC_ENUM_SINGLE(AK4458_00_CONTROL1, 3, 163 ARRAY_SIZE(ak4458_dif_select_texts), 164 ak4458_dif_select_texts); 165 166 static int get_digfil(struct snd_kcontrol *kcontrol, 167 struct snd_ctl_elem_value *ucontrol) 168 { 169 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 170 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 171 172 ucontrol->value.enumerated.item[0] = ak4458->digfil; 173 174 return 0; 175 } 176 177 static int set_digfil(struct snd_kcontrol *kcontrol, 178 struct snd_ctl_elem_value *ucontrol) 179 { 180 struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); 181 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 182 int num; 183 184 num = ucontrol->value.enumerated.item[0]; 185 if (num > 4) 186 return -EINVAL; 187 188 ak4458->digfil = num; 189 190 /* write SD bit */ 191 snd_soc_component_update_bits(component, AK4458_01_CONTROL2, 192 AK4458_SD_MASK, 193 ((ak4458->digfil & 0x02) << 4)); 194 195 /* write SLOW bit */ 196 snd_soc_component_update_bits(component, AK4458_02_CONTROL3, 197 AK4458_SLOW_MASK, 198 (ak4458->digfil & 0x01)); 199 200 /* write SSLOW bit */ 201 snd_soc_component_update_bits(component, AK4458_05_CONTROL4, 202 AK4458_SSLOW_MASK, 203 ((ak4458->digfil & 0x04) >> 2)); 204 205 return 0; 206 } 207 208 static const struct snd_kcontrol_new ak4458_snd_controls[] = { 209 SOC_DOUBLE_R_TLV("DAC1 Playback Volume", AK4458_03_LCHATT, 210 AK4458_04_RCHATT, 0, 0xFF, 0, dac_tlv), 211 SOC_DOUBLE_R_TLV("DAC2 Playback Volume", AK4458_0F_L2CHATT, 212 AK4458_10_R2CHATT, 0, 0xFF, 0, dac_tlv), 213 SOC_DOUBLE_R_TLV("DAC3 Playback Volume", AK4458_11_L3CHATT, 214 AK4458_12_R3CHATT, 0, 0xFF, 0, dac_tlv), 215 SOC_DOUBLE_R_TLV("DAC4 Playback Volume", AK4458_13_L4CHATT, 216 AK4458_14_R4CHATT, 0, 0xFF, 0, dac_tlv), 217 SOC_ENUM("AK4458 De-emphasis Response DAC1", ak4458_dac1_dem_enum), 218 SOC_ENUM("AK4458 De-emphasis Response DAC2", ak4458_dac2_dem_enum), 219 SOC_ENUM("AK4458 De-emphasis Response DAC3", ak4458_dac3_dem_enum), 220 SOC_ENUM("AK4458 De-emphasis Response DAC4", ak4458_dac4_dem_enum), 221 SOC_ENUM_EXT("AK4458 Digital Filter Setting", ak4458_digfil_enum, 222 get_digfil, set_digfil), 223 SOC_ENUM("AK4458 Inverting Enable of DZFB", ak4458_dzfb_enum), 224 SOC_ENUM("AK4458 Sound Mode", ak4458_sm_enum), 225 SOC_ENUM("AK4458 FIR Filter Mode Setting", ak4458_fir_enum), 226 SOC_ENUM("AK4458 Attenuation transition Time Setting", 227 ak4458_ats_enum), 228 SOC_ENUM("AK4458 BICK fs Setting", ak4458_dif_enum), 229 }; 230 231 /* ak4458 dapm widgets */ 232 static const struct snd_soc_dapm_widget ak4458_dapm_widgets[] = { 233 SND_SOC_DAPM_DAC("AK4458 DAC1", NULL, AK4458_0A_CONTROL6, 2, 0),/*pw*/ 234 SND_SOC_DAPM_AIF_IN("AK4458 SDTI", "Playback", 0, SND_SOC_NOPM, 0, 0), 235 SND_SOC_DAPM_OUTPUT("AK4458 AOUTA"), 236 237 SND_SOC_DAPM_DAC("AK4458 DAC2", NULL, AK4458_0A_CONTROL6, 3, 0),/*pw*/ 238 SND_SOC_DAPM_OUTPUT("AK4458 AOUTB"), 239 240 SND_SOC_DAPM_DAC("AK4458 DAC3", NULL, AK4458_0B_CONTROL7, 2, 0),/*pw*/ 241 SND_SOC_DAPM_OUTPUT("AK4458 AOUTC"), 242 243 SND_SOC_DAPM_DAC("AK4458 DAC4", NULL, AK4458_0B_CONTROL7, 3, 0),/*pw*/ 244 SND_SOC_DAPM_OUTPUT("AK4458 AOUTD"), 245 }; 246 247 static const struct snd_soc_dapm_route ak4458_intercon[] = { 248 {"AK4458 DAC1", NULL, "AK4458 SDTI"}, 249 {"AK4458 AOUTA", NULL, "AK4458 DAC1"}, 250 251 {"AK4458 DAC2", NULL, "AK4458 SDTI"}, 252 {"AK4458 AOUTB", NULL, "AK4458 DAC2"}, 253 254 {"AK4458 DAC3", NULL, "AK4458 SDTI"}, 255 {"AK4458 AOUTC", NULL, "AK4458 DAC3"}, 256 257 {"AK4458 DAC4", NULL, "AK4458 SDTI"}, 258 {"AK4458 AOUTD", NULL, "AK4458 DAC4"}, 259 }; 260 261 static int ak4458_rstn_control(struct snd_soc_component *component, int bit) 262 { 263 int ret; 264 265 if (bit) 266 ret = snd_soc_component_update_bits(component, 267 AK4458_00_CONTROL1, 268 AK4458_RSTN_MASK, 269 0x1); 270 else 271 ret = snd_soc_component_update_bits(component, 272 AK4458_00_CONTROL1, 273 AK4458_RSTN_MASK, 274 0x0); 275 return ret; 276 } 277 278 static int ak4458_hw_params(struct snd_pcm_substream *substream, 279 struct snd_pcm_hw_params *params, 280 struct snd_soc_dai *dai) 281 { 282 struct snd_soc_component *component = dai->component; 283 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 284 int pcm_width = max(params_physical_width(params), ak4458->slot_width); 285 int nfs1; 286 u8 format; 287 288 nfs1 = params_rate(params); 289 ak4458->fs = nfs1; 290 291 /* Master Clock Frequency Auto Setting Mode Enable */ 292 snd_soc_component_update_bits(component, AK4458_00_CONTROL1, 0x80, 0x80); 293 294 switch (pcm_width) { 295 case 16: 296 if (ak4458->fmt == SND_SOC_DAIFMT_I2S) 297 format = AK4458_DIF_24BIT_I2S; 298 else 299 format = AK4458_DIF_16BIT_LSB; 300 break; 301 case 32: 302 switch (ak4458->fmt) { 303 case SND_SOC_DAIFMT_I2S: 304 format = AK4458_DIF_32BIT_I2S; 305 break; 306 case SND_SOC_DAIFMT_LEFT_J: 307 format = AK4458_DIF_32BIT_MSB; 308 break; 309 case SND_SOC_DAIFMT_RIGHT_J: 310 format = AK4458_DIF_32BIT_LSB; 311 break; 312 case SND_SOC_DAIFMT_DSP_B: 313 format = AK4458_DIF_32BIT_MSB; 314 break; 315 default: 316 return -EINVAL; 317 } 318 break; 319 default: 320 return -EINVAL; 321 } 322 323 snd_soc_component_update_bits(component, AK4458_00_CONTROL1, 324 AK4458_DIF_MASK, format); 325 326 ak4458_rstn_control(component, 0); 327 ak4458_rstn_control(component, 1); 328 329 return 0; 330 } 331 332 static int ak4458_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) 333 { 334 struct snd_soc_component *component = dai->component; 335 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 336 337 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 338 case SND_SOC_DAIFMT_CBS_CFS: /* Slave Mode */ 339 break; 340 case SND_SOC_DAIFMT_CBM_CFM: /* Master Mode is not supported */ 341 case SND_SOC_DAIFMT_CBS_CFM: 342 case SND_SOC_DAIFMT_CBM_CFS: 343 default: 344 dev_err(component->dev, "Master mode unsupported\n"); 345 return -EINVAL; 346 } 347 348 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 349 case SND_SOC_DAIFMT_I2S: 350 case SND_SOC_DAIFMT_LEFT_J: 351 case SND_SOC_DAIFMT_RIGHT_J: 352 case SND_SOC_DAIFMT_DSP_B: 353 ak4458->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK; 354 break; 355 default: 356 dev_err(component->dev, "Audio format 0x%02X unsupported\n", 357 fmt & SND_SOC_DAIFMT_FORMAT_MASK); 358 return -EINVAL; 359 } 360 361 ak4458_rstn_control(component, 0); 362 ak4458_rstn_control(component, 1); 363 364 return 0; 365 } 366 367 static const int att_speed[] = { 4080, 2040, 510, 255 }; 368 369 static int ak4458_set_dai_mute(struct snd_soc_dai *dai, int mute) 370 { 371 struct snd_soc_component *component = dai->component; 372 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 373 int nfs, ndt, ret, reg; 374 int ats; 375 376 nfs = ak4458->fs; 377 378 reg = snd_soc_component_read32(component, AK4458_0B_CONTROL7); 379 ats = (reg & AK4458_ATS_MASK) >> AK4458_ATS_SHIFT; 380 381 ndt = att_speed[ats] / (nfs / 1000); 382 383 if (mute) { 384 ret = snd_soc_component_update_bits(component, AK4458_01_CONTROL2, 0x01, 1); 385 mdelay(ndt); 386 if (ak4458->mute_gpiod) 387 gpiod_set_value_cansleep(ak4458->mute_gpiod, 1); 388 } else { 389 if (ak4458->mute_gpiod) 390 gpiod_set_value_cansleep(ak4458->mute_gpiod, 0); 391 ret = snd_soc_component_update_bits(component, AK4458_01_CONTROL2, 0x01, 0); 392 mdelay(ndt); 393 } 394 395 return 0; 396 } 397 398 static int ak4458_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, 399 unsigned int rx_mask, int slots, int slot_width) 400 { 401 struct snd_soc_component *component = dai->component; 402 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 403 int mode; 404 405 ak4458->slots = slots; 406 ak4458->slot_width = slot_width; 407 408 switch (slots * slot_width) { 409 case 128: 410 mode = AK4458_MODE_TDM128; 411 break; 412 case 256: 413 mode = AK4458_MODE_TDM256; 414 break; 415 case 512: 416 mode = AK4458_MODE_TDM512; 417 break; 418 default: 419 mode = AK4458_MODE_NORMAL; 420 break; 421 } 422 423 snd_soc_component_update_bits(component, AK4458_0A_CONTROL6, 424 AK4458_MODE_MASK, 425 mode); 426 427 return 0; 428 } 429 430 #define AK4458_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\ 431 SNDRV_PCM_FMTBIT_S24_LE |\ 432 SNDRV_PCM_FMTBIT_S32_LE) 433 434 static const unsigned int ak4458_rates[] = { 435 8000, 11025, 16000, 22050, 436 32000, 44100, 48000, 88200, 437 96000, 176400, 192000, 352800, 438 384000, 705600, 768000, 1411200, 439 2822400, 440 }; 441 442 static const struct snd_pcm_hw_constraint_list ak4458_rate_constraints = { 443 .count = ARRAY_SIZE(ak4458_rates), 444 .list = ak4458_rates, 445 }; 446 447 static int ak4458_startup(struct snd_pcm_substream *substream, 448 struct snd_soc_dai *dai) 449 { 450 int ret; 451 452 ret = snd_pcm_hw_constraint_list(substream->runtime, 0, 453 SNDRV_PCM_HW_PARAM_RATE, 454 &ak4458_rate_constraints); 455 456 return ret; 457 } 458 459 static struct snd_soc_dai_ops ak4458_dai_ops = { 460 .startup = ak4458_startup, 461 .hw_params = ak4458_hw_params, 462 .set_fmt = ak4458_set_dai_fmt, 463 .digital_mute = ak4458_set_dai_mute, 464 .set_tdm_slot = ak4458_set_tdm_slot, 465 }; 466 467 static struct snd_soc_dai_driver ak4458_dai = { 468 .name = "ak4458-aif", 469 .playback = { 470 .stream_name = "Playback", 471 .channels_min = 1, 472 .channels_max = 8, 473 .rates = SNDRV_PCM_RATE_KNOT, 474 .formats = AK4458_FORMATS, 475 }, 476 .ops = &ak4458_dai_ops, 477 }; 478 479 static void ak4458_power_off(struct ak4458_priv *ak4458) 480 { 481 if (ak4458->reset_gpiod) { 482 gpiod_set_value_cansleep(ak4458->reset_gpiod, 0); 483 usleep_range(1000, 2000); 484 } 485 } 486 487 static void ak4458_power_on(struct ak4458_priv *ak4458) 488 { 489 if (ak4458->reset_gpiod) { 490 gpiod_set_value_cansleep(ak4458->reset_gpiod, 1); 491 usleep_range(1000, 2000); 492 } 493 } 494 495 static void ak4458_init(struct snd_soc_component *component) 496 { 497 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 498 499 /* External Mute ON */ 500 if (ak4458->mute_gpiod) 501 gpiod_set_value_cansleep(ak4458->mute_gpiod, 1); 502 503 ak4458_power_on(ak4458); 504 505 snd_soc_component_update_bits(component, AK4458_00_CONTROL1, 506 0x80, 0x80); /* ACKS bit = 1; 10000000 */ 507 508 ak4458_rstn_control(component, 1); 509 } 510 511 static int ak4458_probe(struct snd_soc_component *component) 512 { 513 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 514 515 ak4458_init(component); 516 517 ak4458->fs = 48000; 518 519 return 0; 520 } 521 522 static void ak4458_remove(struct snd_soc_component *component) 523 { 524 struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component); 525 526 ak4458_power_off(ak4458); 527 } 528 529 #ifdef CONFIG_PM 530 static int __maybe_unused ak4458_runtime_suspend(struct device *dev) 531 { 532 struct ak4458_priv *ak4458 = dev_get_drvdata(dev); 533 534 regcache_cache_only(ak4458->regmap, true); 535 536 ak4458_power_off(ak4458); 537 538 if (ak4458->mute_gpiod) 539 gpiod_set_value_cansleep(ak4458->mute_gpiod, 0); 540 541 return 0; 542 } 543 544 static int __maybe_unused ak4458_runtime_resume(struct device *dev) 545 { 546 struct ak4458_priv *ak4458 = dev_get_drvdata(dev); 547 548 if (ak4458->mute_gpiod) 549 gpiod_set_value_cansleep(ak4458->mute_gpiod, 1); 550 551 ak4458_power_off(ak4458); 552 ak4458_power_on(ak4458); 553 554 regcache_cache_only(ak4458->regmap, false); 555 regcache_mark_dirty(ak4458->regmap); 556 557 return regcache_sync(ak4458->regmap); 558 } 559 #endif /* CONFIG_PM */ 560 561 struct snd_soc_component_driver soc_codec_dev_ak4458 = { 562 .probe = ak4458_probe, 563 .remove = ak4458_remove, 564 .controls = ak4458_snd_controls, 565 .num_controls = ARRAY_SIZE(ak4458_snd_controls), 566 .dapm_widgets = ak4458_dapm_widgets, 567 .num_dapm_widgets = ARRAY_SIZE(ak4458_dapm_widgets), 568 .dapm_routes = ak4458_intercon, 569 .num_dapm_routes = ARRAY_SIZE(ak4458_intercon), 570 .idle_bias_on = 1, 571 .use_pmdown_time = 1, 572 .endianness = 1, 573 .non_legacy_dai_naming = 1, 574 }; 575 576 static const struct regmap_config ak4458_regmap = { 577 .reg_bits = 8, 578 .val_bits = 8, 579 580 .max_register = AK4458_14_R4CHATT, 581 .reg_defaults = ak4458_reg_defaults, 582 .num_reg_defaults = ARRAY_SIZE(ak4458_reg_defaults), 583 .cache_type = REGCACHE_RBTREE, 584 }; 585 586 static const struct dev_pm_ops ak4458_pm = { 587 SET_RUNTIME_PM_OPS(ak4458_runtime_suspend, ak4458_runtime_resume, NULL) 588 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 589 pm_runtime_force_resume) 590 }; 591 592 static int ak4458_i2c_probe(struct i2c_client *i2c) 593 { 594 struct ak4458_priv *ak4458; 595 int ret; 596 597 ak4458 = devm_kzalloc(&i2c->dev, sizeof(*ak4458), GFP_KERNEL); 598 if (!ak4458) 599 return -ENOMEM; 600 601 ak4458->regmap = devm_regmap_init_i2c(i2c, &ak4458_regmap); 602 if (IS_ERR(ak4458->regmap)) 603 return PTR_ERR(ak4458->regmap); 604 605 i2c_set_clientdata(i2c, ak4458); 606 ak4458->dev = &i2c->dev; 607 608 ak4458->reset_gpiod = devm_gpiod_get_optional(ak4458->dev, "reset", 609 GPIOD_OUT_LOW); 610 if (IS_ERR(ak4458->reset_gpiod)) 611 return PTR_ERR(ak4458->reset_gpiod); 612 613 ak4458->mute_gpiod = devm_gpiod_get_optional(ak4458->dev, "mute", 614 GPIOD_OUT_LOW); 615 if (IS_ERR(ak4458->mute_gpiod)) 616 return PTR_ERR(ak4458->mute_gpiod); 617 618 ret = devm_snd_soc_register_component(ak4458->dev, &soc_codec_dev_ak4458, 619 &ak4458_dai, 1); 620 if (ret < 0) { 621 dev_err(ak4458->dev, "Failed to register CODEC: %d\n", ret); 622 return ret; 623 } 624 625 pm_runtime_enable(&i2c->dev); 626 627 return 0; 628 } 629 630 static int ak4458_i2c_remove(struct i2c_client *i2c) 631 { 632 pm_runtime_disable(&i2c->dev); 633 634 return 0; 635 } 636 637 static const struct of_device_id ak4458_of_match[] = { 638 { .compatible = "asahi-kasei,ak4458", }, 639 { }, 640 }; 641 642 static struct i2c_driver ak4458_i2c_driver = { 643 .driver = { 644 .name = "ak4458", 645 .pm = &ak4458_pm, 646 .of_match_table = ak4458_of_match, 647 }, 648 .probe_new = ak4458_i2c_probe, 649 .remove = ak4458_i2c_remove, 650 }; 651 652 module_i2c_driver(ak4458_i2c_driver); 653 654 MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>"); 655 MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>"); 656 MODULE_DESCRIPTION("ASoC AK4458 DAC driver"); 657 MODULE_LICENSE("GPL v2"); 658