1 /* 2 * wm8741.c -- WM8741 ALSA SoC Audio driver 3 * 4 * Copyright 2010-1 Wolfson Microelectronics plc 5 * 6 * Author: Ian Lartey <ian@opensource.wolfsonmicro.com> 7 * 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 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/i2c.h> 20 #include <linux/spi/spi.h> 21 #include <linux/regmap.h> 22 #include <linux/regulator/consumer.h> 23 #include <linux/slab.h> 24 #include <linux/of_device.h> 25 #include <sound/core.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/soc.h> 29 #include <sound/initval.h> 30 #include <sound/tlv.h> 31 32 #include "wm8741.h" 33 34 #define WM8741_NUM_SUPPLIES 2 35 static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = { 36 "AVDD", 37 "DVDD", 38 }; 39 40 /* codec private data */ 41 struct wm8741_priv { 42 struct wm8741_platform_data pdata; 43 struct regmap *regmap; 44 struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES]; 45 unsigned int sysclk; 46 const struct snd_pcm_hw_constraint_list *sysclk_constraints; 47 }; 48 49 static const struct reg_default wm8741_reg_defaults[] = { 50 { 0, 0x0000 }, /* R0 - DACLLSB Attenuation */ 51 { 1, 0x0000 }, /* R1 - DACLMSB Attenuation */ 52 { 2, 0x0000 }, /* R2 - DACRLSB Attenuation */ 53 { 3, 0x0000 }, /* R3 - DACRMSB Attenuation */ 54 { 4, 0x0000 }, /* R4 - Volume Control */ 55 { 5, 0x000A }, /* R5 - Format Control */ 56 { 6, 0x0000 }, /* R6 - Filter Control */ 57 { 7, 0x0000 }, /* R7 - Mode Control 1 */ 58 { 8, 0x0002 }, /* R8 - Mode Control 2 */ 59 { 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */ 60 }; 61 62 static int wm8741_reset(struct snd_soc_codec *codec) 63 { 64 return snd_soc_write(codec, WM8741_RESET, 0); 65 } 66 67 static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0); 68 static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0); 69 70 static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = { 71 SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, 72 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine), 73 SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, 74 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv), 75 }; 76 77 static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = { 78 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION, 79 1, 255, 1, dac_tlv_fine), 80 SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION, 81 0, 511, 1, dac_tlv), 82 }; 83 84 static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = { 85 SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION, 86 1, 255, 1, dac_tlv_fine), 87 SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION, 88 0, 511, 1, dac_tlv), 89 }; 90 91 static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = { 92 SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0), 93 SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0), 94 SND_SOC_DAPM_OUTPUT("VOUTLP"), 95 SND_SOC_DAPM_OUTPUT("VOUTLN"), 96 SND_SOC_DAPM_OUTPUT("VOUTRP"), 97 SND_SOC_DAPM_OUTPUT("VOUTRN"), 98 }; 99 100 static const struct snd_soc_dapm_route wm8741_dapm_routes[] = { 101 { "VOUTLP", NULL, "DACL" }, 102 { "VOUTLN", NULL, "DACL" }, 103 { "VOUTRP", NULL, "DACR" }, 104 { "VOUTRN", NULL, "DACR" }, 105 }; 106 107 static const unsigned int rates_11289[] = { 108 44100, 88200, 109 }; 110 111 static const struct snd_pcm_hw_constraint_list constraints_11289 = { 112 .count = ARRAY_SIZE(rates_11289), 113 .list = rates_11289, 114 }; 115 116 static const unsigned int rates_12288[] = { 117 32000, 48000, 96000, 118 }; 119 120 static const struct snd_pcm_hw_constraint_list constraints_12288 = { 121 .count = ARRAY_SIZE(rates_12288), 122 .list = rates_12288, 123 }; 124 125 static const unsigned int rates_16384[] = { 126 32000, 127 }; 128 129 static const struct snd_pcm_hw_constraint_list constraints_16384 = { 130 .count = ARRAY_SIZE(rates_16384), 131 .list = rates_16384, 132 }; 133 134 static const unsigned int rates_16934[] = { 135 44100, 88200, 136 }; 137 138 static const struct snd_pcm_hw_constraint_list constraints_16934 = { 139 .count = ARRAY_SIZE(rates_16934), 140 .list = rates_16934, 141 }; 142 143 static const unsigned int rates_18432[] = { 144 48000, 96000, 145 }; 146 147 static const struct snd_pcm_hw_constraint_list constraints_18432 = { 148 .count = ARRAY_SIZE(rates_18432), 149 .list = rates_18432, 150 }; 151 152 static const unsigned int rates_22579[] = { 153 44100, 88200, 176400 154 }; 155 156 static const struct snd_pcm_hw_constraint_list constraints_22579 = { 157 .count = ARRAY_SIZE(rates_22579), 158 .list = rates_22579, 159 }; 160 161 static const unsigned int rates_24576[] = { 162 32000, 48000, 96000, 192000 163 }; 164 165 static const struct snd_pcm_hw_constraint_list constraints_24576 = { 166 .count = ARRAY_SIZE(rates_24576), 167 .list = rates_24576, 168 }; 169 170 static const unsigned int rates_36864[] = { 171 48000, 96000, 192000 172 }; 173 174 static const struct snd_pcm_hw_constraint_list constraints_36864 = { 175 .count = ARRAY_SIZE(rates_36864), 176 .list = rates_36864, 177 }; 178 179 static int wm8741_startup(struct snd_pcm_substream *substream, 180 struct snd_soc_dai *dai) 181 { 182 struct snd_soc_codec *codec = dai->codec; 183 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 184 185 if (wm8741->sysclk) 186 snd_pcm_hw_constraint_list(substream->runtime, 0, 187 SNDRV_PCM_HW_PARAM_RATE, 188 wm8741->sysclk_constraints); 189 190 return 0; 191 } 192 193 static int wm8741_hw_params(struct snd_pcm_substream *substream, 194 struct snd_pcm_hw_params *params, 195 struct snd_soc_dai *dai) 196 { 197 struct snd_soc_codec *codec = dai->codec; 198 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 199 u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC; 200 int i; 201 202 /* The set of sample rates that can be supported depends on the 203 * MCLK supplied to the CODEC - enforce this. 204 */ 205 if (!wm8741->sysclk) { 206 dev_err(codec->dev, 207 "No MCLK configured, call set_sysclk() on init or in hw_params\n"); 208 return -EINVAL; 209 } 210 211 /* Find a supported LRCLK rate */ 212 for (i = 0; i < wm8741->sysclk_constraints->count; i++) { 213 if (wm8741->sysclk_constraints->list[i] == params_rate(params)) 214 break; 215 } 216 217 if (i == wm8741->sysclk_constraints->count) { 218 dev_err(codec->dev, "LRCLK %d unsupported with MCLK %d\n", 219 params_rate(params), wm8741->sysclk); 220 return -EINVAL; 221 } 222 223 /* bit size */ 224 switch (params_width(params)) { 225 case 16: 226 break; 227 case 20: 228 iface |= 0x0001; 229 break; 230 case 24: 231 iface |= 0x0002; 232 break; 233 case 32: 234 iface |= 0x0003; 235 break; 236 default: 237 dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d", 238 params_width(params)); 239 return -EINVAL; 240 } 241 242 dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d, rate param = %d", 243 params_width(params), params_rate(params)); 244 245 snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface); 246 return 0; 247 } 248 249 static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai, 250 int clk_id, unsigned int freq, int dir) 251 { 252 struct snd_soc_codec *codec = codec_dai->codec; 253 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 254 255 dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq); 256 257 switch (freq) { 258 case 0: 259 wm8741->sysclk_constraints = NULL; 260 break; 261 case 11289600: 262 wm8741->sysclk_constraints = &constraints_11289; 263 break; 264 case 12288000: 265 wm8741->sysclk_constraints = &constraints_12288; 266 break; 267 case 16384000: 268 wm8741->sysclk_constraints = &constraints_16384; 269 break; 270 case 16934400: 271 wm8741->sysclk_constraints = &constraints_16934; 272 break; 273 case 18432000: 274 wm8741->sysclk_constraints = &constraints_18432; 275 break; 276 case 22579200: 277 case 33868800: 278 wm8741->sysclk_constraints = &constraints_22579; 279 break; 280 case 24576000: 281 wm8741->sysclk_constraints = &constraints_24576; 282 break; 283 case 36864000: 284 wm8741->sysclk_constraints = &constraints_36864; 285 break; 286 default: 287 return -EINVAL; 288 } 289 290 wm8741->sysclk = freq; 291 return 0; 292 } 293 294 static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai, 295 unsigned int fmt) 296 { 297 struct snd_soc_codec *codec = codec_dai->codec; 298 u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3; 299 300 /* check master/slave audio interface */ 301 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 302 case SND_SOC_DAIFMT_CBS_CFS: 303 break; 304 default: 305 return -EINVAL; 306 } 307 308 /* interface format */ 309 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 310 case SND_SOC_DAIFMT_I2S: 311 iface |= 0x0008; 312 break; 313 case SND_SOC_DAIFMT_RIGHT_J: 314 break; 315 case SND_SOC_DAIFMT_LEFT_J: 316 iface |= 0x0004; 317 break; 318 case SND_SOC_DAIFMT_DSP_A: 319 iface |= 0x000C; 320 break; 321 case SND_SOC_DAIFMT_DSP_B: 322 iface |= 0x001C; 323 break; 324 default: 325 return -EINVAL; 326 } 327 328 /* clock inversion */ 329 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 330 case SND_SOC_DAIFMT_NB_NF: 331 break; 332 case SND_SOC_DAIFMT_IB_IF: 333 iface |= 0x0010; 334 break; 335 case SND_SOC_DAIFMT_IB_NF: 336 iface |= 0x0020; 337 break; 338 case SND_SOC_DAIFMT_NB_IF: 339 iface |= 0x0030; 340 break; 341 default: 342 return -EINVAL; 343 } 344 345 346 dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n", 347 fmt & SND_SOC_DAIFMT_FORMAT_MASK, 348 ((fmt & SND_SOC_DAIFMT_INV_MASK))); 349 350 snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface); 351 return 0; 352 } 353 354 #define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ 355 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \ 356 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \ 357 SNDRV_PCM_RATE_192000) 358 359 #define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 360 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE) 361 362 static const struct snd_soc_dai_ops wm8741_dai_ops = { 363 .startup = wm8741_startup, 364 .hw_params = wm8741_hw_params, 365 .set_sysclk = wm8741_set_dai_sysclk, 366 .set_fmt = wm8741_set_dai_fmt, 367 }; 368 369 static struct snd_soc_dai_driver wm8741_dai = { 370 .name = "wm8741", 371 .playback = { 372 .stream_name = "Playback", 373 .channels_min = 2, 374 .channels_max = 2, 375 .rates = WM8741_RATES, 376 .formats = WM8741_FORMATS, 377 }, 378 .ops = &wm8741_dai_ops, 379 }; 380 381 #ifdef CONFIG_PM 382 static int wm8741_resume(struct snd_soc_codec *codec) 383 { 384 snd_soc_cache_sync(codec); 385 return 0; 386 } 387 #else 388 #define wm8741_resume NULL 389 #endif 390 391 static int wm8741_configure(struct snd_soc_codec *codec) 392 { 393 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 394 395 /* Configure differential mode */ 396 switch (wm8741->pdata.diff_mode) { 397 case WM8741_DIFF_MODE_STEREO: 398 case WM8741_DIFF_MODE_STEREO_REVERSED: 399 case WM8741_DIFF_MODE_MONO_LEFT: 400 case WM8741_DIFF_MODE_MONO_RIGHT: 401 snd_soc_update_bits(codec, WM8741_MODE_CONTROL_2, 402 WM8741_DIFF_MASK, 403 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT); 404 break; 405 default: 406 return -EINVAL; 407 } 408 409 /* Change some default settings - latch VU */ 410 snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION, 411 WM8741_UPDATELL, WM8741_UPDATELL); 412 snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION, 413 WM8741_UPDATELM, WM8741_UPDATELM); 414 snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION, 415 WM8741_UPDATERL, WM8741_UPDATERL); 416 snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION, 417 WM8741_UPDATERM, WM8741_UPDATERM); 418 419 return 0; 420 } 421 422 static int wm8741_add_controls(struct snd_soc_codec *codec) 423 { 424 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 425 426 switch (wm8741->pdata.diff_mode) { 427 case WM8741_DIFF_MODE_STEREO: 428 case WM8741_DIFF_MODE_STEREO_REVERSED: 429 snd_soc_add_codec_controls(codec, 430 wm8741_snd_controls_stereo, 431 ARRAY_SIZE(wm8741_snd_controls_stereo)); 432 break; 433 case WM8741_DIFF_MODE_MONO_LEFT: 434 snd_soc_add_codec_controls(codec, 435 wm8741_snd_controls_mono_left, 436 ARRAY_SIZE(wm8741_snd_controls_mono_left)); 437 break; 438 case WM8741_DIFF_MODE_MONO_RIGHT: 439 snd_soc_add_codec_controls(codec, 440 wm8741_snd_controls_mono_right, 441 ARRAY_SIZE(wm8741_snd_controls_mono_right)); 442 break; 443 default: 444 return -EINVAL; 445 } 446 447 return 0; 448 } 449 450 static int wm8741_probe(struct snd_soc_codec *codec) 451 { 452 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 453 int ret = 0; 454 455 ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies), 456 wm8741->supplies); 457 if (ret != 0) { 458 dev_err(codec->dev, "Failed to enable supplies: %d\n", ret); 459 goto err_get; 460 } 461 462 ret = wm8741_reset(codec); 463 if (ret < 0) { 464 dev_err(codec->dev, "Failed to issue reset\n"); 465 goto err_enable; 466 } 467 468 ret = wm8741_configure(codec); 469 if (ret < 0) { 470 dev_err(codec->dev, "Failed to change default settings\n"); 471 goto err_enable; 472 } 473 474 ret = wm8741_add_controls(codec); 475 if (ret < 0) { 476 dev_err(codec->dev, "Failed to add controls\n"); 477 goto err_enable; 478 } 479 480 dev_dbg(codec->dev, "Successful registration\n"); 481 return ret; 482 483 err_enable: 484 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); 485 err_get: 486 return ret; 487 } 488 489 static int wm8741_remove(struct snd_soc_codec *codec) 490 { 491 struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec); 492 493 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies); 494 495 return 0; 496 } 497 498 static const struct snd_soc_codec_driver soc_codec_dev_wm8741 = { 499 .probe = wm8741_probe, 500 .remove = wm8741_remove, 501 .resume = wm8741_resume, 502 503 .component_driver = { 504 .dapm_widgets = wm8741_dapm_widgets, 505 .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets), 506 .dapm_routes = wm8741_dapm_routes, 507 .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes), 508 }, 509 }; 510 511 static const struct of_device_id wm8741_of_match[] = { 512 { .compatible = "wlf,wm8741", }, 513 { } 514 }; 515 MODULE_DEVICE_TABLE(of, wm8741_of_match); 516 517 static const struct regmap_config wm8741_regmap = { 518 .reg_bits = 7, 519 .val_bits = 9, 520 .max_register = WM8741_MAX_REGISTER, 521 522 .reg_defaults = wm8741_reg_defaults, 523 .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults), 524 .cache_type = REGCACHE_RBTREE, 525 }; 526 527 static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741) 528 { 529 const struct wm8741_platform_data *pdata = dev_get_platdata(dev); 530 u32 diff_mode; 531 532 if (dev->of_node) { 533 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode) 534 >= 0) 535 wm8741->pdata.diff_mode = diff_mode; 536 } else { 537 if (pdata != NULL) 538 memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata)); 539 } 540 541 return 0; 542 } 543 544 #if IS_ENABLED(CONFIG_I2C) 545 static int wm8741_i2c_probe(struct i2c_client *i2c, 546 const struct i2c_device_id *id) 547 { 548 struct wm8741_priv *wm8741; 549 int ret, i; 550 551 wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv), 552 GFP_KERNEL); 553 if (wm8741 == NULL) 554 return -ENOMEM; 555 556 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) 557 wm8741->supplies[i].supply = wm8741_supply_names[i]; 558 559 ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies), 560 wm8741->supplies); 561 if (ret != 0) { 562 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret); 563 return ret; 564 } 565 566 wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap); 567 if (IS_ERR(wm8741->regmap)) { 568 ret = PTR_ERR(wm8741->regmap); 569 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret); 570 return ret; 571 } 572 573 ret = wm8741_set_pdata(&i2c->dev, wm8741); 574 if (ret != 0) { 575 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret); 576 return ret; 577 } 578 579 i2c_set_clientdata(i2c, wm8741); 580 581 ret = snd_soc_register_codec(&i2c->dev, 582 &soc_codec_dev_wm8741, &wm8741_dai, 1); 583 584 return ret; 585 } 586 587 static int wm8741_i2c_remove(struct i2c_client *client) 588 { 589 snd_soc_unregister_codec(&client->dev); 590 return 0; 591 } 592 593 static const struct i2c_device_id wm8741_i2c_id[] = { 594 { "wm8741", 0 }, 595 { } 596 }; 597 MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id); 598 599 static struct i2c_driver wm8741_i2c_driver = { 600 .driver = { 601 .name = "wm8741", 602 .of_match_table = wm8741_of_match, 603 }, 604 .probe = wm8741_i2c_probe, 605 .remove = wm8741_i2c_remove, 606 .id_table = wm8741_i2c_id, 607 }; 608 #endif 609 610 #if defined(CONFIG_SPI_MASTER) 611 static int wm8741_spi_probe(struct spi_device *spi) 612 { 613 struct wm8741_priv *wm8741; 614 int ret, i; 615 616 wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv), 617 GFP_KERNEL); 618 if (wm8741 == NULL) 619 return -ENOMEM; 620 621 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++) 622 wm8741->supplies[i].supply = wm8741_supply_names[i]; 623 624 ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies), 625 wm8741->supplies); 626 if (ret != 0) { 627 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret); 628 return ret; 629 } 630 631 wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap); 632 if (IS_ERR(wm8741->regmap)) { 633 ret = PTR_ERR(wm8741->regmap); 634 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret); 635 return ret; 636 } 637 638 ret = wm8741_set_pdata(&spi->dev, wm8741); 639 if (ret != 0) { 640 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret); 641 return ret; 642 } 643 644 spi_set_drvdata(spi, wm8741); 645 646 ret = snd_soc_register_codec(&spi->dev, 647 &soc_codec_dev_wm8741, &wm8741_dai, 1); 648 return ret; 649 } 650 651 static int wm8741_spi_remove(struct spi_device *spi) 652 { 653 snd_soc_unregister_codec(&spi->dev); 654 return 0; 655 } 656 657 static struct spi_driver wm8741_spi_driver = { 658 .driver = { 659 .name = "wm8741", 660 .of_match_table = wm8741_of_match, 661 }, 662 .probe = wm8741_spi_probe, 663 .remove = wm8741_spi_remove, 664 }; 665 #endif /* CONFIG_SPI_MASTER */ 666 667 static int __init wm8741_modinit(void) 668 { 669 int ret = 0; 670 671 #if IS_ENABLED(CONFIG_I2C) 672 ret = i2c_add_driver(&wm8741_i2c_driver); 673 if (ret != 0) 674 pr_err("Failed to register WM8741 I2C driver: %d\n", ret); 675 #endif 676 #if defined(CONFIG_SPI_MASTER) 677 ret = spi_register_driver(&wm8741_spi_driver); 678 if (ret != 0) { 679 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n", 680 ret); 681 } 682 #endif 683 684 return ret; 685 } 686 module_init(wm8741_modinit); 687 688 static void __exit wm8741_exit(void) 689 { 690 #if defined(CONFIG_SPI_MASTER) 691 spi_unregister_driver(&wm8741_spi_driver); 692 #endif 693 #if IS_ENABLED(CONFIG_I2C) 694 i2c_del_driver(&wm8741_i2c_driver); 695 #endif 696 } 697 module_exit(wm8741_exit); 698 699 MODULE_DESCRIPTION("ASoC WM8741 driver"); 700 MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>"); 701 MODULE_LICENSE("GPL"); 702