1 // SPDX-License-Identifier: GPL-2.0 2 // 3 // Driver for the MAX9860 Mono Audio Voice Codec 4 // 5 // https://datasheets.maximintegrated.com/en/ds/MAX9860.pdf 6 // 7 // The driver does not support sidetone since the DVST register field is 8 // backwards with the mute near the maximum level instead of the minimum. 9 // 10 // Author: Peter Rosin <peda@axentia.s> 11 // Copyright 2016 Axentia Technologies 12 13 #include <linux/init.h> 14 #include <linux/module.h> 15 #include <linux/clk.h> 16 #include <linux/kernel.h> 17 #include <linux/pm_runtime.h> 18 #include <linux/regmap.h> 19 #include <linux/i2c.h> 20 #include <linux/regulator/consumer.h> 21 #include <sound/soc.h> 22 #include <sound/soc-dapm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/tlv.h> 25 26 #include "max9860.h" 27 28 struct max9860_priv { 29 struct regmap *regmap; 30 struct regulator *dvddio; 31 struct notifier_block dvddio_nb; 32 u8 psclk; 33 unsigned long pclk_rate; 34 int fmt; 35 }; 36 37 static int max9860_dvddio_event(struct notifier_block *nb, 38 unsigned long event, void *data) 39 { 40 struct max9860_priv *max9860 = container_of(nb, struct max9860_priv, 41 dvddio_nb); 42 if (event & REGULATOR_EVENT_DISABLE) { 43 regcache_mark_dirty(max9860->regmap); 44 regcache_cache_only(max9860->regmap, true); 45 } 46 47 return 0; 48 } 49 50 static const struct reg_default max9860_reg_defaults[] = { 51 { MAX9860_PWRMAN, 0x00 }, 52 { MAX9860_INTEN, 0x00 }, 53 { MAX9860_SYSCLK, 0x00 }, 54 { MAX9860_AUDIOCLKHIGH, 0x00 }, 55 { MAX9860_AUDIOCLKLOW, 0x00 }, 56 { MAX9860_IFC1A, 0x00 }, 57 { MAX9860_IFC1B, 0x00 }, 58 { MAX9860_VOICEFLTR, 0x00 }, 59 { MAX9860_DACATTN, 0x00 }, 60 { MAX9860_ADCLEVEL, 0x00 }, 61 { MAX9860_DACGAIN, 0x00 }, 62 { MAX9860_MICGAIN, 0x00 }, 63 { MAX9860_MICADC, 0x00 }, 64 { MAX9860_NOISEGATE, 0x00 }, 65 }; 66 67 static bool max9860_readable(struct device *dev, unsigned int reg) 68 { 69 switch (reg) { 70 case MAX9860_INTRSTATUS ... MAX9860_MICGAIN: 71 case MAX9860_MICADC ... MAX9860_PWRMAN: 72 case MAX9860_REVISION: 73 return true; 74 } 75 76 return false; 77 } 78 79 static bool max9860_writeable(struct device *dev, unsigned int reg) 80 { 81 switch (reg) { 82 case MAX9860_INTEN ... MAX9860_MICGAIN: 83 case MAX9860_MICADC ... MAX9860_PWRMAN: 84 return true; 85 } 86 87 return false; 88 } 89 90 static bool max9860_volatile(struct device *dev, unsigned int reg) 91 { 92 switch (reg) { 93 case MAX9860_INTRSTATUS: 94 case MAX9860_MICREADBACK: 95 return true; 96 } 97 98 return false; 99 } 100 101 static bool max9860_precious(struct device *dev, unsigned int reg) 102 { 103 switch (reg) { 104 case MAX9860_INTRSTATUS: 105 return true; 106 } 107 108 return false; 109 } 110 111 static const struct regmap_config max9860_regmap = { 112 .reg_bits = 8, 113 .val_bits = 8, 114 115 .readable_reg = max9860_readable, 116 .writeable_reg = max9860_writeable, 117 .volatile_reg = max9860_volatile, 118 .precious_reg = max9860_precious, 119 120 .max_register = MAX9860_MAX_REGISTER, 121 .reg_defaults = max9860_reg_defaults, 122 .num_reg_defaults = ARRAY_SIZE(max9860_reg_defaults), 123 .cache_type = REGCACHE_RBTREE, 124 }; 125 126 static const DECLARE_TLV_DB_SCALE(dva_tlv, -9100, 100, 1); 127 static const DECLARE_TLV_DB_SCALE(dvg_tlv, 0, 600, 0); 128 static const DECLARE_TLV_DB_SCALE(adc_tlv, -1200, 100, 0); 129 static const DECLARE_TLV_DB_RANGE(pam_tlv, 130 0, MAX9860_PAM_MAX - 1, TLV_DB_SCALE_ITEM(-2000, 2000, 1), 131 MAX9860_PAM_MAX, MAX9860_PAM_MAX, TLV_DB_SCALE_ITEM(3000, 0, 0)); 132 static const DECLARE_TLV_DB_SCALE(pgam_tlv, 0, 100, 0); 133 static const DECLARE_TLV_DB_SCALE(anth_tlv, -7600, 400, 1); 134 static const DECLARE_TLV_DB_SCALE(agcth_tlv, -1800, 100, 0); 135 136 static const char * const agchld_text[] = { 137 "AGC Disabled", "50ms", "100ms", "400ms" 138 }; 139 140 static SOC_ENUM_SINGLE_DECL(agchld_enum, MAX9860_MICADC, 141 MAX9860_AGCHLD_SHIFT, agchld_text); 142 143 static const char * const agcsrc_text[] = { 144 "Left ADC", "Left/Right ADC" 145 }; 146 147 static SOC_ENUM_SINGLE_DECL(agcsrc_enum, MAX9860_MICADC, 148 MAX9860_AGCSRC_SHIFT, agcsrc_text); 149 150 static const char * const agcatk_text[] = { 151 "3ms", "12ms", "50ms", "200ms" 152 }; 153 154 static SOC_ENUM_SINGLE_DECL(agcatk_enum, MAX9860_MICADC, 155 MAX9860_AGCATK_SHIFT, agcatk_text); 156 157 static const char * const agcrls_text[] = { 158 "78ms", "156ms", "312ms", "625ms", 159 "1.25s", "2.5s", "5s", "10s" 160 }; 161 162 static SOC_ENUM_SINGLE_DECL(agcrls_enum, MAX9860_MICADC, 163 MAX9860_AGCRLS_SHIFT, agcrls_text); 164 165 static const char * const filter_text[] = { 166 "Disabled", 167 "Elliptical HP 217Hz notch (16kHz)", 168 "Butterworth HP 500Hz (16kHz)", 169 "Elliptical HP 217Hz notch (8kHz)", 170 "Butterworth HP 500Hz (8kHz)", 171 "Butterworth HP 200Hz (48kHz)" 172 }; 173 174 static SOC_ENUM_SINGLE_DECL(avflt_enum, MAX9860_VOICEFLTR, 175 MAX9860_AVFLT_SHIFT, filter_text); 176 177 static SOC_ENUM_SINGLE_DECL(dvflt_enum, MAX9860_VOICEFLTR, 178 MAX9860_DVFLT_SHIFT, filter_text); 179 180 static const struct snd_kcontrol_new max9860_controls[] = { 181 SOC_SINGLE_TLV("Master Playback Volume", MAX9860_DACATTN, 182 MAX9860_DVA_SHIFT, MAX9860_DVA_MUTE, 1, dva_tlv), 183 SOC_SINGLE_TLV("DAC Gain Volume", MAX9860_DACGAIN, 184 MAX9860_DVG_SHIFT, MAX9860_DVG_MAX, 0, dvg_tlv), 185 SOC_DOUBLE_TLV("Line Capture Volume", MAX9860_ADCLEVEL, 186 MAX9860_ADCLL_SHIFT, MAX9860_ADCRL_SHIFT, MAX9860_ADCxL_MIN, 1, 187 adc_tlv), 188 189 SOC_ENUM("AGC Hold Time", agchld_enum), 190 SOC_ENUM("AGC/Noise Gate Source", agcsrc_enum), 191 SOC_ENUM("AGC Attack Time", agcatk_enum), 192 SOC_ENUM("AGC Release Time", agcrls_enum), 193 194 SOC_SINGLE_TLV("Noise Gate Threshold Volume", MAX9860_NOISEGATE, 195 MAX9860_ANTH_SHIFT, MAX9860_ANTH_MAX, 0, anth_tlv), 196 SOC_SINGLE_TLV("AGC Signal Threshold Volume", MAX9860_NOISEGATE, 197 MAX9860_AGCTH_SHIFT, MAX9860_AGCTH_MIN, 1, agcth_tlv), 198 199 SOC_SINGLE_TLV("Mic PGA Volume", MAX9860_MICGAIN, 200 MAX9860_PGAM_SHIFT, MAX9860_PGAM_MIN, 1, pgam_tlv), 201 SOC_SINGLE_TLV("Mic Preamp Volume", MAX9860_MICGAIN, 202 MAX9860_PAM_SHIFT, MAX9860_PAM_MAX, 0, pam_tlv), 203 204 SOC_ENUM("ADC Filter", avflt_enum), 205 SOC_ENUM("DAC Filter", dvflt_enum), 206 }; 207 208 static const struct snd_soc_dapm_widget max9860_dapm_widgets[] = { 209 SND_SOC_DAPM_INPUT("MICL"), 210 SND_SOC_DAPM_INPUT("MICR"), 211 212 SND_SOC_DAPM_ADC("ADCL", NULL, MAX9860_PWRMAN, MAX9860_ADCLEN_SHIFT, 0), 213 SND_SOC_DAPM_ADC("ADCR", NULL, MAX9860_PWRMAN, MAX9860_ADCREN_SHIFT, 0), 214 215 SND_SOC_DAPM_AIF_OUT("AIFOUTL", "Capture", 0, SND_SOC_NOPM, 0, 0), 216 SND_SOC_DAPM_AIF_OUT("AIFOUTR", "Capture", 1, SND_SOC_NOPM, 0, 0), 217 218 SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0), 219 SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0), 220 221 SND_SOC_DAPM_DAC("DAC", NULL, MAX9860_PWRMAN, MAX9860_DACEN_SHIFT, 0), 222 223 SND_SOC_DAPM_OUTPUT("OUT"), 224 225 SND_SOC_DAPM_SUPPLY("Supply", SND_SOC_NOPM, 0, 0, 226 NULL, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 227 SND_SOC_DAPM_REGULATOR_SUPPLY("AVDD", 0, 0), 228 SND_SOC_DAPM_REGULATOR_SUPPLY("DVDD", 0, 0), 229 SND_SOC_DAPM_CLOCK_SUPPLY("mclk"), 230 }; 231 232 static const struct snd_soc_dapm_route max9860_dapm_routes[] = { 233 { "ADCL", NULL, "MICL" }, 234 { "ADCR", NULL, "MICR" }, 235 { "AIFOUTL", NULL, "ADCL" }, 236 { "AIFOUTR", NULL, "ADCR" }, 237 238 { "DAC", NULL, "AIFINL" }, 239 { "DAC", NULL, "AIFINR" }, 240 { "OUT", NULL, "DAC" }, 241 242 { "Supply", NULL, "AVDD" }, 243 { "Supply", NULL, "DVDD" }, 244 { "Supply", NULL, "mclk" }, 245 246 { "DAC", NULL, "Supply" }, 247 { "ADCL", NULL, "Supply" }, 248 { "ADCR", NULL, "Supply" }, 249 }; 250 251 static int max9860_hw_params(struct snd_pcm_substream *substream, 252 struct snd_pcm_hw_params *params, 253 struct snd_soc_dai *dai) 254 { 255 struct snd_soc_component *component = dai->component; 256 struct max9860_priv *max9860 = snd_soc_component_get_drvdata(component); 257 u8 master; 258 u8 ifc1a = 0; 259 u8 ifc1b = 0; 260 u8 sysclk = 0; 261 unsigned long n; 262 int ret; 263 264 dev_dbg(component->dev, "hw_params %u Hz, %u channels\n", 265 params_rate(params), 266 params_channels(params)); 267 268 if (params_channels(params) == 2) 269 ifc1b |= MAX9860_ST; 270 271 switch (max9860->fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 272 case SND_SOC_DAIFMT_CBC_CFC: 273 master = 0; 274 break; 275 case SND_SOC_DAIFMT_CBP_CFP: 276 master = MAX9860_MASTER; 277 break; 278 default: 279 return -EINVAL; 280 } 281 ifc1a |= master; 282 283 if (master) { 284 if (params_width(params) * params_channels(params) > 48) 285 ifc1b |= MAX9860_BSEL_64X; 286 else 287 ifc1b |= MAX9860_BSEL_48X; 288 } 289 290 switch (max9860->fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 291 case SND_SOC_DAIFMT_I2S: 292 ifc1a |= MAX9860_DDLY; 293 ifc1b |= MAX9860_ADLY; 294 break; 295 case SND_SOC_DAIFMT_LEFT_J: 296 ifc1a |= MAX9860_WCI; 297 break; 298 case SND_SOC_DAIFMT_DSP_A: 299 if (params_width(params) != 16) { 300 dev_err(component->dev, 301 "DSP_A works for 16 bits per sample only.\n"); 302 return -EINVAL; 303 } 304 ifc1a |= MAX9860_DDLY | MAX9860_WCI | MAX9860_HIZ | MAX9860_TDM; 305 ifc1b |= MAX9860_ADLY; 306 break; 307 case SND_SOC_DAIFMT_DSP_B: 308 if (params_width(params) != 16) { 309 dev_err(component->dev, 310 "DSP_B works for 16 bits per sample only.\n"); 311 return -EINVAL; 312 } 313 ifc1a |= MAX9860_WCI | MAX9860_HIZ | MAX9860_TDM; 314 break; 315 default: 316 return -EINVAL; 317 } 318 319 switch (max9860->fmt & SND_SOC_DAIFMT_INV_MASK) { 320 case SND_SOC_DAIFMT_NB_NF: 321 break; 322 case SND_SOC_DAIFMT_NB_IF: 323 switch (max9860->fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 324 case SND_SOC_DAIFMT_DSP_A: 325 case SND_SOC_DAIFMT_DSP_B: 326 return -EINVAL; 327 } 328 ifc1a ^= MAX9860_WCI; 329 break; 330 case SND_SOC_DAIFMT_IB_IF: 331 switch (max9860->fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 332 case SND_SOC_DAIFMT_DSP_A: 333 case SND_SOC_DAIFMT_DSP_B: 334 return -EINVAL; 335 } 336 ifc1a ^= MAX9860_WCI; 337 fallthrough; 338 case SND_SOC_DAIFMT_IB_NF: 339 ifc1a ^= MAX9860_DBCI; 340 ifc1b ^= MAX9860_ABCI; 341 break; 342 default: 343 return -EINVAL; 344 } 345 346 dev_dbg(component->dev, "IFC1A %02x\n", ifc1a); 347 ret = regmap_write(max9860->regmap, MAX9860_IFC1A, ifc1a); 348 if (ret) { 349 dev_err(component->dev, "Failed to set IFC1A: %d\n", ret); 350 return ret; 351 } 352 dev_dbg(component->dev, "IFC1B %02x\n", ifc1b); 353 ret = regmap_write(max9860->regmap, MAX9860_IFC1B, ifc1b); 354 if (ret) { 355 dev_err(component->dev, "Failed to set IFC1B: %d\n", ret); 356 return ret; 357 } 358 359 /* 360 * Check if Integer Clock Mode is possible, but avoid it in slave mode 361 * since we then do not know if lrclk is derived from pclk and the 362 * datasheet mentions that the frequencies have to match exactly in 363 * order for this to work. 364 */ 365 if (params_rate(params) == 8000 || params_rate(params) == 16000) { 366 if (master) { 367 switch (max9860->pclk_rate) { 368 case 12000000: 369 sysclk = MAX9860_FREQ_12MHZ; 370 break; 371 case 13000000: 372 sysclk = MAX9860_FREQ_13MHZ; 373 break; 374 case 19200000: 375 sysclk = MAX9860_FREQ_19_2MHZ; 376 break; 377 default: 378 /* 379 * Integer Clock Mode not possible. Leave 380 * sysclk at zero and fall through to the 381 * code below for PLL mode. 382 */ 383 break; 384 } 385 386 if (sysclk && params_rate(params) == 16000) 387 sysclk |= MAX9860_16KHZ; 388 } 389 } 390 391 /* 392 * Largest possible n: 393 * 65536 * 96 * 48kHz / 10MHz -> 30199 394 * Smallest possible n: 395 * 65536 * 96 * 8kHz / 20MHz -> 2517 396 * Both fit nicely in the available 15 bits, no need to apply any mask. 397 */ 398 n = DIV_ROUND_CLOSEST_ULL(65536ULL * 96 * params_rate(params), 399 max9860->pclk_rate); 400 401 if (!sysclk) { 402 /* PLL mode */ 403 if (params_rate(params) > 24000) 404 sysclk |= MAX9860_16KHZ; 405 406 if (!master) 407 n |= 1; /* trigger rapid pll lock mode */ 408 } 409 410 sysclk |= max9860->psclk; 411 dev_dbg(component->dev, "SYSCLK %02x\n", sysclk); 412 ret = regmap_write(max9860->regmap, 413 MAX9860_SYSCLK, sysclk); 414 if (ret) { 415 dev_err(component->dev, "Failed to set SYSCLK: %d\n", ret); 416 return ret; 417 } 418 dev_dbg(component->dev, "N %lu\n", n); 419 ret = regmap_write(max9860->regmap, 420 MAX9860_AUDIOCLKHIGH, n >> 8); 421 if (ret) { 422 dev_err(component->dev, "Failed to set NHI: %d\n", ret); 423 return ret; 424 } 425 ret = regmap_write(max9860->regmap, 426 MAX9860_AUDIOCLKLOW, n & 0xff); 427 if (ret) { 428 dev_err(component->dev, "Failed to set NLO: %d\n", ret); 429 return ret; 430 } 431 432 if (!master) { 433 dev_dbg(component->dev, "Enable PLL\n"); 434 ret = regmap_update_bits(max9860->regmap, MAX9860_AUDIOCLKHIGH, 435 MAX9860_PLL, MAX9860_PLL); 436 if (ret) { 437 dev_err(component->dev, "Failed to enable PLL: %d\n", 438 ret); 439 return ret; 440 } 441 } 442 443 return 0; 444 } 445 446 static int max9860_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 447 { 448 struct snd_soc_component *component = dai->component; 449 struct max9860_priv *max9860 = snd_soc_component_get_drvdata(component); 450 451 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 452 case SND_SOC_DAIFMT_CBP_CFP: 453 case SND_SOC_DAIFMT_CBC_CFC: 454 max9860->fmt = fmt; 455 return 0; 456 457 default: 458 return -EINVAL; 459 } 460 } 461 462 static const struct snd_soc_dai_ops max9860_dai_ops = { 463 .hw_params = max9860_hw_params, 464 .set_fmt = max9860_set_fmt, 465 }; 466 467 static struct snd_soc_dai_driver max9860_dai = { 468 .name = "max9860-hifi", 469 .playback = { 470 .stream_name = "Playback", 471 .channels_min = 1, 472 .channels_max = 2, 473 .rates = SNDRV_PCM_RATE_CONTINUOUS, 474 .rate_min = 8000, 475 .rate_max = 48000, 476 .formats = SNDRV_PCM_FMTBIT_S16_LE | 477 SNDRV_PCM_FMTBIT_S24_LE | 478 SNDRV_PCM_FMTBIT_S32_LE, 479 }, 480 .capture = { 481 .stream_name = "Capture", 482 .channels_min = 1, 483 .channels_max = 2, 484 .rates = SNDRV_PCM_RATE_CONTINUOUS, 485 .rate_min = 8000, 486 .rate_max = 48000, 487 .formats = SNDRV_PCM_FMTBIT_S16_LE | 488 SNDRV_PCM_FMTBIT_S24_LE | 489 SNDRV_PCM_FMTBIT_S32_LE, 490 }, 491 .ops = &max9860_dai_ops, 492 .symmetric_rate = 1, 493 }; 494 495 static int max9860_set_bias_level(struct snd_soc_component *component, 496 enum snd_soc_bias_level level) 497 { 498 struct max9860_priv *max9860 = dev_get_drvdata(component->dev); 499 int ret; 500 501 switch (level) { 502 case SND_SOC_BIAS_ON: 503 case SND_SOC_BIAS_PREPARE: 504 break; 505 506 case SND_SOC_BIAS_STANDBY: 507 ret = regmap_update_bits(max9860->regmap, MAX9860_PWRMAN, 508 MAX9860_SHDN, MAX9860_SHDN); 509 if (ret) { 510 dev_err(component->dev, "Failed to remove SHDN: %d\n", 511 ret); 512 return ret; 513 } 514 break; 515 516 case SND_SOC_BIAS_OFF: 517 ret = regmap_update_bits(max9860->regmap, MAX9860_PWRMAN, 518 MAX9860_SHDN, 0); 519 if (ret) { 520 dev_err(component->dev, "Failed to request SHDN: %d\n", 521 ret); 522 return ret; 523 } 524 break; 525 } 526 527 return 0; 528 } 529 530 static const struct snd_soc_component_driver max9860_component_driver = { 531 .set_bias_level = max9860_set_bias_level, 532 .controls = max9860_controls, 533 .num_controls = ARRAY_SIZE(max9860_controls), 534 .dapm_widgets = max9860_dapm_widgets, 535 .num_dapm_widgets = ARRAY_SIZE(max9860_dapm_widgets), 536 .dapm_routes = max9860_dapm_routes, 537 .num_dapm_routes = ARRAY_SIZE(max9860_dapm_routes), 538 .use_pmdown_time = 1, 539 .endianness = 1, 540 }; 541 542 #ifdef CONFIG_PM 543 static int max9860_suspend(struct device *dev) 544 { 545 struct max9860_priv *max9860 = dev_get_drvdata(dev); 546 int ret; 547 548 ret = regmap_update_bits(max9860->regmap, MAX9860_SYSCLK, 549 MAX9860_PSCLK, MAX9860_PSCLK_OFF); 550 if (ret) { 551 dev_err(dev, "Failed to disable clock: %d\n", ret); 552 return ret; 553 } 554 555 regulator_disable(max9860->dvddio); 556 557 return 0; 558 } 559 560 static int max9860_resume(struct device *dev) 561 { 562 struct max9860_priv *max9860 = dev_get_drvdata(dev); 563 int ret; 564 565 ret = regulator_enable(max9860->dvddio); 566 if (ret) { 567 dev_err(dev, "Failed to enable DVDDIO: %d\n", ret); 568 return ret; 569 } 570 571 regcache_cache_only(max9860->regmap, false); 572 ret = regcache_sync(max9860->regmap); 573 if (ret) { 574 dev_err(dev, "Failed to sync cache: %d\n", ret); 575 return ret; 576 } 577 578 ret = regmap_update_bits(max9860->regmap, MAX9860_SYSCLK, 579 MAX9860_PSCLK, max9860->psclk); 580 if (ret) { 581 dev_err(dev, "Failed to enable clock: %d\n", ret); 582 return ret; 583 } 584 585 return 0; 586 } 587 #endif 588 589 static const struct dev_pm_ops max9860_pm_ops = { 590 SET_RUNTIME_PM_OPS(max9860_suspend, max9860_resume, NULL) 591 }; 592 593 static int max9860_probe(struct i2c_client *i2c) 594 { 595 struct device *dev = &i2c->dev; 596 struct max9860_priv *max9860; 597 int ret; 598 struct clk *mclk; 599 unsigned long mclk_rate; 600 int i; 601 int intr; 602 603 max9860 = devm_kzalloc(dev, sizeof(struct max9860_priv), GFP_KERNEL); 604 if (!max9860) 605 return -ENOMEM; 606 607 max9860->dvddio = devm_regulator_get(dev, "DVDDIO"); 608 if (IS_ERR(max9860->dvddio)) 609 return dev_err_probe(dev, PTR_ERR(max9860->dvddio), 610 "Failed to get DVDDIO supply\n"); 611 612 max9860->dvddio_nb.notifier_call = max9860_dvddio_event; 613 614 ret = devm_regulator_register_notifier(max9860->dvddio, 615 &max9860->dvddio_nb); 616 if (ret) 617 dev_err(dev, "Failed to register DVDDIO notifier: %d\n", ret); 618 619 ret = regulator_enable(max9860->dvddio); 620 if (ret != 0) { 621 dev_err(dev, "Failed to enable DVDDIO: %d\n", ret); 622 return ret; 623 } 624 625 max9860->regmap = devm_regmap_init_i2c(i2c, &max9860_regmap); 626 if (IS_ERR(max9860->regmap)) { 627 ret = PTR_ERR(max9860->regmap); 628 goto err_regulator; 629 } 630 631 dev_set_drvdata(dev, max9860); 632 633 /* 634 * mclk has to be in the 10MHz to 60MHz range. 635 * psclk is used to scale mclk into pclk so that 636 * pclk is in the 10MHz to 20MHz range. 637 */ 638 mclk = clk_get(dev, "mclk"); 639 640 if (IS_ERR(mclk)) { 641 ret = PTR_ERR(mclk); 642 dev_err_probe(dev, ret, "Failed to get MCLK\n"); 643 goto err_regulator; 644 } 645 646 mclk_rate = clk_get_rate(mclk); 647 clk_put(mclk); 648 649 if (mclk_rate > 60000000 || mclk_rate < 10000000) { 650 dev_err(dev, "Bad mclk %luHz (needs 10MHz - 60MHz)\n", 651 mclk_rate); 652 ret = -EINVAL; 653 goto err_regulator; 654 } 655 if (mclk_rate >= 40000000) 656 max9860->psclk = 3; 657 else if (mclk_rate >= 20000000) 658 max9860->psclk = 2; 659 else 660 max9860->psclk = 1; 661 max9860->pclk_rate = mclk_rate >> (max9860->psclk - 1); 662 max9860->psclk <<= MAX9860_PSCLK_SHIFT; 663 dev_dbg(dev, "mclk %lu pclk %lu\n", mclk_rate, max9860->pclk_rate); 664 665 regcache_cache_bypass(max9860->regmap, true); 666 for (i = 0; i < max9860_regmap.num_reg_defaults; ++i) { 667 ret = regmap_write(max9860->regmap, 668 max9860_regmap.reg_defaults[i].reg, 669 max9860_regmap.reg_defaults[i].def); 670 if (ret) { 671 dev_err(dev, "Failed to initialize register %u: %d\n", 672 max9860_regmap.reg_defaults[i].reg, ret); 673 goto err_regulator; 674 } 675 } 676 regcache_cache_bypass(max9860->regmap, false); 677 678 ret = regmap_read(max9860->regmap, MAX9860_INTRSTATUS, &intr); 679 if (ret) { 680 dev_err(dev, "Failed to clear INTRSTATUS: %d\n", ret); 681 goto err_regulator; 682 } 683 684 pm_runtime_set_active(dev); 685 pm_runtime_enable(dev); 686 pm_runtime_idle(dev); 687 688 ret = devm_snd_soc_register_component(dev, &max9860_component_driver, 689 &max9860_dai, 1); 690 if (ret) { 691 dev_err(dev, "Failed to register CODEC: %d\n", ret); 692 goto err_pm; 693 } 694 695 return 0; 696 697 err_pm: 698 pm_runtime_disable(dev); 699 err_regulator: 700 regulator_disable(max9860->dvddio); 701 return ret; 702 } 703 704 static void max9860_remove(struct i2c_client *i2c) 705 { 706 struct device *dev = &i2c->dev; 707 struct max9860_priv *max9860 = dev_get_drvdata(dev); 708 709 pm_runtime_disable(dev); 710 regulator_disable(max9860->dvddio); 711 } 712 713 static const struct i2c_device_id max9860_i2c_id[] = { 714 { "max9860", }, 715 { } 716 }; 717 MODULE_DEVICE_TABLE(i2c, max9860_i2c_id); 718 719 static const struct of_device_id max9860_of_match[] = { 720 { .compatible = "maxim,max9860", }, 721 { } 722 }; 723 MODULE_DEVICE_TABLE(of, max9860_of_match); 724 725 static struct i2c_driver max9860_i2c_driver = { 726 .probe_new = max9860_probe, 727 .remove = max9860_remove, 728 .id_table = max9860_i2c_id, 729 .driver = { 730 .name = "max9860", 731 .of_match_table = max9860_of_match, 732 .pm = &max9860_pm_ops, 733 }, 734 }; 735 736 module_i2c_driver(max9860_i2c_driver); 737 738 MODULE_DESCRIPTION("ASoC MAX9860 Mono Audio Voice Codec driver"); 739 MODULE_AUTHOR("Peter Rosin <peda@axentia.se>"); 740 MODULE_LICENSE("GPL v2"); 741