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10#include <linux/module.h>
11#include <linux/moduleparam.h>
12#include <linux/init.h>
13#include <linux/delay.h>
14#include <linux/pm.h>
15#include <linux/i2c.h>
16#include <linux/spi/spi.h>
17#include <linux/regmap.h>
18#include <linux/regulator/consumer.h>
19#include <linux/slab.h>
20#include <linux/of_device.h>
21#include <sound/core.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25#include <sound/initval.h>
26#include <sound/tlv.h>
27
28#include "wm8741.h"
29
30#define WM8741_NUM_SUPPLIES 2
31static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
32 "AVDD",
33 "DVDD",
34};
35
36
37struct wm8741_priv {
38 struct wm8741_platform_data pdata;
39 struct regmap *regmap;
40 struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
41 unsigned int sysclk;
42 const struct snd_pcm_hw_constraint_list *sysclk_constraints;
43};
44
45static const struct reg_default wm8741_reg_defaults[] = {
46 { 0, 0x0000 },
47 { 1, 0x0000 },
48 { 2, 0x0000 },
49 { 3, 0x0000 },
50 { 4, 0x0000 },
51 { 5, 0x000A },
52 { 6, 0x0000 },
53 { 7, 0x0000 },
54 { 8, 0x0002 },
55 { 32, 0x0002 },
56};
57
58static int wm8741_reset(struct snd_soc_component *component)
59{
60 return snd_soc_component_write(component, WM8741_RESET, 0);
61}
62
63static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
64static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
65
66static const struct snd_kcontrol_new wm8741_snd_controls_stereo[] = {
67SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
68 WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
69SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
70 WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
71};
72
73static const struct snd_kcontrol_new wm8741_snd_controls_mono_left[] = {
74SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
75 1, 255, 1, dac_tlv_fine),
76SOC_SINGLE_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
77 0, 511, 1, dac_tlv),
78};
79
80static const struct snd_kcontrol_new wm8741_snd_controls_mono_right[] = {
81SOC_SINGLE_TLV("Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
82 1, 255, 1, dac_tlv_fine),
83SOC_SINGLE_TLV("Playback Volume", WM8741_DACRMSB_ATTENUATION,
84 0, 511, 1, dac_tlv),
85};
86
87static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
88SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
89SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
90SND_SOC_DAPM_OUTPUT("VOUTLP"),
91SND_SOC_DAPM_OUTPUT("VOUTLN"),
92SND_SOC_DAPM_OUTPUT("VOUTRP"),
93SND_SOC_DAPM_OUTPUT("VOUTRN"),
94};
95
96static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
97 { "VOUTLP", NULL, "DACL" },
98 { "VOUTLN", NULL, "DACL" },
99 { "VOUTRP", NULL, "DACR" },
100 { "VOUTRN", NULL, "DACR" },
101};
102
103static const unsigned int rates_11289[] = {
104 44100, 88200,
105};
106
107static const struct snd_pcm_hw_constraint_list constraints_11289 = {
108 .count = ARRAY_SIZE(rates_11289),
109 .list = rates_11289,
110};
111
112static const unsigned int rates_12288[] = {
113 32000, 48000, 96000,
114};
115
116static const struct snd_pcm_hw_constraint_list constraints_12288 = {
117 .count = ARRAY_SIZE(rates_12288),
118 .list = rates_12288,
119};
120
121static const unsigned int rates_16384[] = {
122 32000,
123};
124
125static const struct snd_pcm_hw_constraint_list constraints_16384 = {
126 .count = ARRAY_SIZE(rates_16384),
127 .list = rates_16384,
128};
129
130static const unsigned int rates_16934[] = {
131 44100, 88200,
132};
133
134static const struct snd_pcm_hw_constraint_list constraints_16934 = {
135 .count = ARRAY_SIZE(rates_16934),
136 .list = rates_16934,
137};
138
139static const unsigned int rates_18432[] = {
140 48000, 96000,
141};
142
143static const struct snd_pcm_hw_constraint_list constraints_18432 = {
144 .count = ARRAY_SIZE(rates_18432),
145 .list = rates_18432,
146};
147
148static const unsigned int rates_22579[] = {
149 44100, 88200, 176400
150};
151
152static const struct snd_pcm_hw_constraint_list constraints_22579 = {
153 .count = ARRAY_SIZE(rates_22579),
154 .list = rates_22579,
155};
156
157static const unsigned int rates_24576[] = {
158 32000, 48000, 96000, 192000
159};
160
161static const struct snd_pcm_hw_constraint_list constraints_24576 = {
162 .count = ARRAY_SIZE(rates_24576),
163 .list = rates_24576,
164};
165
166static const unsigned int rates_36864[] = {
167 48000, 96000, 192000
168};
169
170static const struct snd_pcm_hw_constraint_list constraints_36864 = {
171 .count = ARRAY_SIZE(rates_36864),
172 .list = rates_36864,
173};
174
175static int wm8741_startup(struct snd_pcm_substream *substream,
176 struct snd_soc_dai *dai)
177{
178 struct snd_soc_component *component = dai->component;
179 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
180
181 if (wm8741->sysclk)
182 snd_pcm_hw_constraint_list(substream->runtime, 0,
183 SNDRV_PCM_HW_PARAM_RATE,
184 wm8741->sysclk_constraints);
185
186 return 0;
187}
188
189static int wm8741_hw_params(struct snd_pcm_substream *substream,
190 struct snd_pcm_hw_params *params,
191 struct snd_soc_dai *dai)
192{
193 struct snd_soc_component *component = dai->component;
194 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
195 unsigned int iface, mode;
196 int i;
197
198
199
200
201 if (!wm8741->sysclk) {
202 dev_err(component->dev,
203 "No MCLK configured, call set_sysclk() on init or in hw_params\n");
204 return -EINVAL;
205 }
206
207
208 for (i = 0; i < wm8741->sysclk_constraints->count; i++) {
209 if (wm8741->sysclk_constraints->list[i] == params_rate(params))
210 break;
211 }
212
213 if (i == wm8741->sysclk_constraints->count) {
214 dev_err(component->dev, "LRCLK %d unsupported with MCLK %d\n",
215 params_rate(params), wm8741->sysclk);
216 return -EINVAL;
217 }
218
219
220 switch (params_width(params)) {
221 case 16:
222 iface = 0x0;
223 break;
224 case 20:
225 iface = 0x1;
226 break;
227 case 24:
228 iface = 0x2;
229 break;
230 case 32:
231 iface = 0x3;
232 break;
233 default:
234 dev_dbg(component->dev, "wm8741_hw_params: Unsupported bit size param = %d",
235 params_width(params));
236 return -EINVAL;
237 }
238
239
240 if (params_rate(params) > 96000)
241 mode = 0x40;
242 else if (params_rate(params) > 48000)
243 mode = 0x20;
244 else
245 mode = 0x00;
246
247 dev_dbg(component->dev, "wm8741_hw_params: bit size param = %d, rate param = %d",
248 params_width(params), params_rate(params));
249
250 snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
251 iface);
252 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
253 mode);
254
255 return 0;
256}
257
258static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
259 int clk_id, unsigned int freq, int dir)
260{
261 struct snd_soc_component *component = codec_dai->component;
262 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
263
264 dev_dbg(component->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
265
266 switch (freq) {
267 case 0:
268 wm8741->sysclk_constraints = NULL;
269 break;
270 case 11289600:
271 wm8741->sysclk_constraints = &constraints_11289;
272 break;
273 case 12288000:
274 wm8741->sysclk_constraints = &constraints_12288;
275 break;
276 case 16384000:
277 wm8741->sysclk_constraints = &constraints_16384;
278 break;
279 case 16934400:
280 wm8741->sysclk_constraints = &constraints_16934;
281 break;
282 case 18432000:
283 wm8741->sysclk_constraints = &constraints_18432;
284 break;
285 case 22579200:
286 case 33868800:
287 wm8741->sysclk_constraints = &constraints_22579;
288 break;
289 case 24576000:
290 wm8741->sysclk_constraints = &constraints_24576;
291 break;
292 case 36864000:
293 wm8741->sysclk_constraints = &constraints_36864;
294 break;
295 default:
296 return -EINVAL;
297 }
298
299 wm8741->sysclk = freq;
300 return 0;
301}
302
303static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
304 unsigned int fmt)
305{
306 struct snd_soc_component *component = codec_dai->component;
307 unsigned int iface;
308
309
310 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
311 case SND_SOC_DAIFMT_CBS_CFS:
312 break;
313 default:
314 return -EINVAL;
315 }
316
317
318 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
319 case SND_SOC_DAIFMT_I2S:
320 iface = 0x08;
321 break;
322 case SND_SOC_DAIFMT_RIGHT_J:
323 iface = 0x00;
324 break;
325 case SND_SOC_DAIFMT_LEFT_J:
326 iface = 0x04;
327 break;
328 case SND_SOC_DAIFMT_DSP_A:
329 iface = 0x0C;
330 break;
331 case SND_SOC_DAIFMT_DSP_B:
332 iface = 0x1C;
333 break;
334 default:
335 return -EINVAL;
336 }
337
338
339 switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
340 case SND_SOC_DAIFMT_NB_NF:
341 break;
342 case SND_SOC_DAIFMT_NB_IF:
343 iface |= 0x10;
344 break;
345 case SND_SOC_DAIFMT_IB_NF:
346 iface |= 0x20;
347 break;
348 case SND_SOC_DAIFMT_IB_IF:
349 iface |= 0x30;
350 break;
351 default:
352 return -EINVAL;
353 }
354
355
356 dev_dbg(component->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
357 fmt & SND_SOC_DAIFMT_FORMAT_MASK,
358 ((fmt & SND_SOC_DAIFMT_INV_MASK)));
359
360 snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL,
361 WM8741_BCP_MASK | WM8741_LRP_MASK | WM8741_FMT_MASK,
362 iface);
363
364 return 0;
365}
366
367static int wm8741_mute(struct snd_soc_dai *codec_dai, int mute, int direction)
368{
369 struct snd_soc_component *component = codec_dai->component;
370
371 snd_soc_component_update_bits(component, WM8741_VOLUME_CONTROL,
372 WM8741_SOFT_MASK, !!mute << WM8741_SOFT_SHIFT);
373 return 0;
374}
375
376#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
377 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
378 SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
379 SNDRV_PCM_RATE_192000)
380
381#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
382 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
383
384static const struct snd_soc_dai_ops wm8741_dai_ops = {
385 .startup = wm8741_startup,
386 .hw_params = wm8741_hw_params,
387 .set_sysclk = wm8741_set_dai_sysclk,
388 .set_fmt = wm8741_set_dai_fmt,
389 .mute_stream = wm8741_mute,
390 .no_capture_mute = 1,
391};
392
393static struct snd_soc_dai_driver wm8741_dai = {
394 .name = "wm8741",
395 .playback = {
396 .stream_name = "Playback",
397 .channels_min = 2,
398 .channels_max = 2,
399 .rates = WM8741_RATES,
400 .formats = WM8741_FORMATS,
401 },
402 .ops = &wm8741_dai_ops,
403};
404
405#ifdef CONFIG_PM
406static int wm8741_resume(struct snd_soc_component *component)
407{
408 snd_soc_component_cache_sync(component);
409 return 0;
410}
411#else
412#define wm8741_resume NULL
413#endif
414
415static int wm8741_configure(struct snd_soc_component *component)
416{
417 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
418
419
420 switch (wm8741->pdata.diff_mode) {
421 case WM8741_DIFF_MODE_STEREO:
422 case WM8741_DIFF_MODE_STEREO_REVERSED:
423 case WM8741_DIFF_MODE_MONO_LEFT:
424 case WM8741_DIFF_MODE_MONO_RIGHT:
425 snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_2,
426 WM8741_DIFF_MASK,
427 wm8741->pdata.diff_mode << WM8741_DIFF_SHIFT);
428 break;
429 default:
430 return -EINVAL;
431 }
432
433
434 snd_soc_component_update_bits(component, WM8741_DACLLSB_ATTENUATION,
435 WM8741_UPDATELL, WM8741_UPDATELL);
436 snd_soc_component_update_bits(component, WM8741_DACLMSB_ATTENUATION,
437 WM8741_UPDATELM, WM8741_UPDATELM);
438 snd_soc_component_update_bits(component, WM8741_DACRLSB_ATTENUATION,
439 WM8741_UPDATERL, WM8741_UPDATERL);
440 snd_soc_component_update_bits(component, WM8741_DACRMSB_ATTENUATION,
441 WM8741_UPDATERM, WM8741_UPDATERM);
442
443 return 0;
444}
445
446static int wm8741_add_controls(struct snd_soc_component *component)
447{
448 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
449
450 switch (wm8741->pdata.diff_mode) {
451 case WM8741_DIFF_MODE_STEREO:
452 case WM8741_DIFF_MODE_STEREO_REVERSED:
453 snd_soc_add_component_controls(component,
454 wm8741_snd_controls_stereo,
455 ARRAY_SIZE(wm8741_snd_controls_stereo));
456 break;
457 case WM8741_DIFF_MODE_MONO_LEFT:
458 snd_soc_add_component_controls(component,
459 wm8741_snd_controls_mono_left,
460 ARRAY_SIZE(wm8741_snd_controls_mono_left));
461 break;
462 case WM8741_DIFF_MODE_MONO_RIGHT:
463 snd_soc_add_component_controls(component,
464 wm8741_snd_controls_mono_right,
465 ARRAY_SIZE(wm8741_snd_controls_mono_right));
466 break;
467 default:
468 return -EINVAL;
469 }
470
471 return 0;
472}
473
474static int wm8741_probe(struct snd_soc_component *component)
475{
476 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
477 int ret = 0;
478
479 ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
480 wm8741->supplies);
481 if (ret != 0) {
482 dev_err(component->dev, "Failed to enable supplies: %d\n", ret);
483 goto err_get;
484 }
485
486 ret = wm8741_reset(component);
487 if (ret < 0) {
488 dev_err(component->dev, "Failed to issue reset\n");
489 goto err_enable;
490 }
491
492 ret = wm8741_configure(component);
493 if (ret < 0) {
494 dev_err(component->dev, "Failed to change default settings\n");
495 goto err_enable;
496 }
497
498 ret = wm8741_add_controls(component);
499 if (ret < 0) {
500 dev_err(component->dev, "Failed to add controls\n");
501 goto err_enable;
502 }
503
504 dev_dbg(component->dev, "Successful registration\n");
505 return ret;
506
507err_enable:
508 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
509err_get:
510 return ret;
511}
512
513static void wm8741_remove(struct snd_soc_component *component)
514{
515 struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
516
517 regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
518}
519
520static const struct snd_soc_component_driver soc_component_dev_wm8741 = {
521 .probe = wm8741_probe,
522 .remove = wm8741_remove,
523 .resume = wm8741_resume,
524 .dapm_widgets = wm8741_dapm_widgets,
525 .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
526 .dapm_routes = wm8741_dapm_routes,
527 .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
528 .idle_bias_on = 1,
529 .use_pmdown_time = 1,
530 .endianness = 1,
531 .non_legacy_dai_naming = 1,
532};
533
534static const struct of_device_id wm8741_of_match[] = {
535 { .compatible = "wlf,wm8741", },
536 { }
537};
538MODULE_DEVICE_TABLE(of, wm8741_of_match);
539
540static const struct regmap_config wm8741_regmap = {
541 .reg_bits = 7,
542 .val_bits = 9,
543 .max_register = WM8741_MAX_REGISTER,
544
545 .reg_defaults = wm8741_reg_defaults,
546 .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
547 .cache_type = REGCACHE_RBTREE,
548};
549
550static int wm8741_set_pdata(struct device *dev, struct wm8741_priv *wm8741)
551{
552 const struct wm8741_platform_data *pdata = dev_get_platdata(dev);
553 u32 diff_mode;
554
555 if (dev->of_node) {
556 if (of_property_read_u32(dev->of_node, "diff-mode", &diff_mode)
557 >= 0)
558 wm8741->pdata.diff_mode = diff_mode;
559 } else {
560 if (pdata != NULL)
561 memcpy(&wm8741->pdata, pdata, sizeof(wm8741->pdata));
562 }
563
564 return 0;
565}
566
567#if IS_ENABLED(CONFIG_I2C)
568static int wm8741_i2c_probe(struct i2c_client *i2c,
569 const struct i2c_device_id *id)
570{
571 struct wm8741_priv *wm8741;
572 int ret, i;
573
574 wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
575 GFP_KERNEL);
576 if (wm8741 == NULL)
577 return -ENOMEM;
578
579 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
580 wm8741->supplies[i].supply = wm8741_supply_names[i];
581
582 ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
583 wm8741->supplies);
584 if (ret != 0) {
585 dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
586 return ret;
587 }
588
589 wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
590 if (IS_ERR(wm8741->regmap)) {
591 ret = PTR_ERR(wm8741->regmap);
592 dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
593 return ret;
594 }
595
596 ret = wm8741_set_pdata(&i2c->dev, wm8741);
597 if (ret != 0) {
598 dev_err(&i2c->dev, "Failed to set pdata: %d\n", ret);
599 return ret;
600 }
601
602 i2c_set_clientdata(i2c, wm8741);
603
604 ret = devm_snd_soc_register_component(&i2c->dev,
605 &soc_component_dev_wm8741, &wm8741_dai, 1);
606
607 return ret;
608}
609
610static const struct i2c_device_id wm8741_i2c_id[] = {
611 { "wm8741", 0 },
612 { }
613};
614MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
615
616static struct i2c_driver wm8741_i2c_driver = {
617 .driver = {
618 .name = "wm8741",
619 .of_match_table = wm8741_of_match,
620 },
621 .probe = wm8741_i2c_probe,
622 .id_table = wm8741_i2c_id,
623};
624#endif
625
626#if defined(CONFIG_SPI_MASTER)
627static int wm8741_spi_probe(struct spi_device *spi)
628{
629 struct wm8741_priv *wm8741;
630 int ret, i;
631
632 wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
633 GFP_KERNEL);
634 if (wm8741 == NULL)
635 return -ENOMEM;
636
637 for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
638 wm8741->supplies[i].supply = wm8741_supply_names[i];
639
640 ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
641 wm8741->supplies);
642 if (ret != 0) {
643 dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
644 return ret;
645 }
646
647 wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
648 if (IS_ERR(wm8741->regmap)) {
649 ret = PTR_ERR(wm8741->regmap);
650 dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
651 return ret;
652 }
653
654 ret = wm8741_set_pdata(&spi->dev, wm8741);
655 if (ret != 0) {
656 dev_err(&spi->dev, "Failed to set pdata: %d\n", ret);
657 return ret;
658 }
659
660 spi_set_drvdata(spi, wm8741);
661
662 ret = devm_snd_soc_register_component(&spi->dev,
663 &soc_component_dev_wm8741, &wm8741_dai, 1);
664 return ret;
665}
666
667static struct spi_driver wm8741_spi_driver = {
668 .driver = {
669 .name = "wm8741",
670 .of_match_table = wm8741_of_match,
671 },
672 .probe = wm8741_spi_probe,
673};
674#endif
675
676static int __init wm8741_modinit(void)
677{
678 int ret = 0;
679
680#if IS_ENABLED(CONFIG_I2C)
681 ret = i2c_add_driver(&wm8741_i2c_driver);
682 if (ret != 0)
683 pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
684#endif
685#if defined(CONFIG_SPI_MASTER)
686 ret = spi_register_driver(&wm8741_spi_driver);
687 if (ret != 0) {
688 printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
689 ret);
690 }
691#endif
692
693 return ret;
694}
695module_init(wm8741_modinit);
696
697static void __exit wm8741_exit(void)
698{
699#if defined(CONFIG_SPI_MASTER)
700 spi_unregister_driver(&wm8741_spi_driver);
701#endif
702#if IS_ENABLED(CONFIG_I2C)
703 i2c_del_driver(&wm8741_i2c_driver);
704#endif
705}
706module_exit(wm8741_exit);
707
708MODULE_DESCRIPTION("ASoC WM8741 driver");
709MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
710MODULE_LICENSE("GPL");
711
