1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright(c) 2018-19 Canonical Corporation.
3 
4 /*
5  * Intel Kabylake I2S Machine Driver with RT5660 Codec
6  *
7  * Modified from:
8  *   Intel Kabylake I2S Machine driver supporting MAXIM98357a and
9  *   DA7219 codecs
10  * Also referred to:
11  *   Intel Broadwell I2S Machine driver supporting RT5677 codec
12  */
13 
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/gpio/consumer.h>
17 #include <linux/acpi.h>
18 #include <sound/core.h>
19 #include <sound/jack.h>
20 #include <sound/pcm.h>
21 #include <sound/pcm_params.h>
22 #include <sound/soc.h>
23 
24 #include "../../codecs/hdac_hdmi.h"
25 #include "../../codecs/rt5660.h"
26 
27 #define KBL_RT5660_CODEC_DAI "rt5660-aif1"
28 #define DUAL_CHANNEL 2
29 
30 static struct snd_soc_card *kabylake_audio_card;
31 static struct snd_soc_jack skylake_hdmi[3];
32 static struct snd_soc_jack lineout_jack;
33 static struct snd_soc_jack mic_jack;
34 
35 struct kbl_hdmi_pcm {
36 	struct list_head head;
37 	struct snd_soc_dai *codec_dai;
38 	int device;
39 };
40 
41 struct kbl_codec_private {
42 	struct gpio_desc *gpio_lo_mute;
43 	struct list_head hdmi_pcm_list;
44 };
45 
46 enum {
47 	KBL_DPCM_AUDIO_PB = 0,
48 	KBL_DPCM_AUDIO_CP,
49 	KBL_DPCM_AUDIO_HDMI1_PB,
50 	KBL_DPCM_AUDIO_HDMI2_PB,
51 	KBL_DPCM_AUDIO_HDMI3_PB,
52 };
53 
54 #define GPIO_LINEOUT_MUTE_INDEX 0
55 #define GPIO_LINEOUT_DET_INDEX 3
56 #define GPIO_LINEIN_DET_INDEX 4
57 
58 static const struct acpi_gpio_params lineout_mute_gpio = { GPIO_LINEOUT_MUTE_INDEX, 0, true };
59 static const struct acpi_gpio_params lineout_det_gpio = { GPIO_LINEOUT_DET_INDEX, 0, false };
60 static const struct acpi_gpio_params mic_det_gpio = { GPIO_LINEIN_DET_INDEX, 0, false };
61 
62 
63 static const struct acpi_gpio_mapping acpi_rt5660_gpios[] = {
64 	{ "lineout-mute-gpios", &lineout_mute_gpio, 1 },
65 	{ "lineout-det-gpios", &lineout_det_gpio, 1 },
66 	{ "mic-det-gpios", &mic_det_gpio, 1 },
67 	{ NULL },
68 };
69 
70 static struct snd_soc_jack_pin lineout_jack_pin = {
71 	.pin	= "Line Out",
72 	.mask	= SND_JACK_LINEOUT,
73 };
74 
75 static struct snd_soc_jack_pin mic_jack_pin = {
76 	.pin	= "Line In",
77 	.mask	= SND_JACK_MICROPHONE,
78 };
79 
80 static struct snd_soc_jack_gpio lineout_jack_gpio = {
81 	.name			= "lineout-det",
82 	.report			= SND_JACK_LINEOUT,
83 	.debounce_time		= 200,
84 };
85 
86 static struct snd_soc_jack_gpio mic_jack_gpio = {
87 	.name			= "mic-det",
88 	.report			= SND_JACK_MICROPHONE,
89 	.debounce_time		= 200,
90 };
91 
92 static int kabylake_5660_event_lineout(struct snd_soc_dapm_widget *w,
93 			struct snd_kcontrol *k, int event)
94 {
95 	struct snd_soc_dapm_context *dapm = w->dapm;
96 	struct kbl_codec_private *priv = snd_soc_card_get_drvdata(dapm->card);
97 
98 	gpiod_set_value_cansleep(priv->gpio_lo_mute,
99 			!(SND_SOC_DAPM_EVENT_ON(event)));
100 
101 	return 0;
102 }
103 
104 static const struct snd_kcontrol_new kabylake_rt5660_controls[] = {
105 	SOC_DAPM_PIN_SWITCH("Line In"),
106 	SOC_DAPM_PIN_SWITCH("Line Out"),
107 };
108 
109 static const struct snd_soc_dapm_widget kabylake_rt5660_widgets[] = {
110 	SND_SOC_DAPM_MIC("Line In", NULL),
111 	SND_SOC_DAPM_LINE("Line Out", kabylake_5660_event_lineout),
112 };
113 
114 static const struct snd_soc_dapm_route kabylake_rt5660_map[] = {
115 	/* other jacks */
116 	{"IN1P", NULL, "Line In"},
117 	{"IN2P", NULL, "Line In"},
118 	{"Line Out", NULL, "LOUTR"},
119 	{"Line Out", NULL, "LOUTL"},
120 
121 	/* CODEC BE connections */
122 	{ "AIF1 Playback", NULL, "ssp0 Tx"},
123 	{ "ssp0 Tx", NULL, "codec0_out"},
124 
125 	{ "codec0_in", NULL, "ssp0 Rx" },
126 	{ "ssp0 Rx", NULL, "AIF1 Capture" },
127 
128 	{ "hifi1", NULL, "iDisp1 Tx"},
129 	{ "iDisp1 Tx", NULL, "iDisp1_out"},
130 	{ "hifi2", NULL, "iDisp2 Tx"},
131 	{ "iDisp2 Tx", NULL, "iDisp2_out"},
132 	{ "hifi3", NULL, "iDisp3 Tx"},
133 	{ "iDisp3 Tx", NULL, "iDisp3_out"},
134 };
135 
136 static int kabylake_ssp0_fixup(struct snd_soc_pcm_runtime *rtd,
137 			struct snd_pcm_hw_params *params)
138 {
139 	struct snd_interval *rate = hw_param_interval(params,
140 			SNDRV_PCM_HW_PARAM_RATE);
141 	struct snd_interval *chan = hw_param_interval(params,
142 			SNDRV_PCM_HW_PARAM_CHANNELS);
143 	struct snd_mask *fmt = hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
144 
145 	/* The ADSP will convert the FE rate to 48k, stereo */
146 	rate->min = rate->max = 48000;
147 	chan->min = chan->max = DUAL_CHANNEL;
148 
149 	/* set SSP0 to 24 bit */
150 	snd_mask_none(fmt);
151 	snd_mask_set_format(fmt, SNDRV_PCM_FORMAT_S24_LE);
152 
153 	return 0;
154 }
155 
156 static int kabylake_rt5660_codec_init(struct snd_soc_pcm_runtime *rtd)
157 {
158 	int ret;
159 	struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(rtd->card);
160 	struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
161 	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
162 
163 	ret = devm_acpi_dev_add_driver_gpios(component->dev, acpi_rt5660_gpios);
164 	if (ret)
165 		dev_warn(component->dev, "Failed to add driver gpios\n");
166 
167 	/* Request rt5660 GPIO for lineout mute control, return if fails */
168 	ctx->gpio_lo_mute = gpiod_get(component->dev, "lineout-mute",
169 				      GPIOD_OUT_HIGH);
170 	if (IS_ERR(ctx->gpio_lo_mute)) {
171 		dev_err(component->dev, "Can't find GPIO_MUTE# gpio\n");
172 		return PTR_ERR(ctx->gpio_lo_mute);
173 	}
174 
175 	/* Create and initialize headphone jack, this jack is not mandatory, don't return if fails */
176 	ret = snd_soc_card_jack_new(rtd->card, "Lineout Jack",
177 				    SND_JACK_LINEOUT, &lineout_jack,
178 				    &lineout_jack_pin, 1);
179 	if (ret)
180 		dev_warn(component->dev, "Can't create Lineout jack\n");
181 	else {
182 		lineout_jack_gpio.gpiod_dev = component->dev;
183 		ret = snd_soc_jack_add_gpios(&lineout_jack, 1,
184 					     &lineout_jack_gpio);
185 		if (ret)
186 			dev_warn(component->dev, "Can't add Lineout jack gpio\n");
187 	}
188 
189 	/* Create and initialize mic jack, this jack is not mandatory, don't return if fails */
190 	ret = snd_soc_card_jack_new(rtd->card, "Mic Jack",
191 				    SND_JACK_MICROPHONE, &mic_jack,
192 				    &mic_jack_pin, 1);
193 	if (ret)
194 		dev_warn(component->dev, "Can't create mic jack\n");
195 	else {
196 		mic_jack_gpio.gpiod_dev = component->dev;
197 		ret = snd_soc_jack_add_gpios(&mic_jack, 1, &mic_jack_gpio);
198 		if (ret)
199 			dev_warn(component->dev, "Can't add mic jack gpio\n");
200 	}
201 
202 	/* Here we enable some dapms in advance to reduce the pop noise for recording via line-in */
203 	snd_soc_dapm_force_enable_pin(dapm, "MICBIAS1");
204 	snd_soc_dapm_force_enable_pin(dapm, "BST1");
205 	snd_soc_dapm_force_enable_pin(dapm, "BST2");
206 
207 	return 0;
208 }
209 
210 static void kabylake_rt5660_codec_exit(struct snd_soc_pcm_runtime *rtd)
211 {
212 	struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(rtd->card);
213 
214 	/*
215 	 * The .exit() can be reached without going through the .init()
216 	 * so explicitly test if the gpiod is valid
217 	 */
218 	if (!IS_ERR_OR_NULL(ctx->gpio_lo_mute))
219 		gpiod_put(ctx->gpio_lo_mute);
220 }
221 
222 static int kabylake_hdmi_init(struct snd_soc_pcm_runtime *rtd, int device)
223 {
224 	struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(rtd->card);
225 	struct snd_soc_dai *dai = asoc_rtd_to_codec(rtd, 0);
226 	struct kbl_hdmi_pcm *pcm;
227 
228 	pcm = devm_kzalloc(rtd->card->dev, sizeof(*pcm), GFP_KERNEL);
229 	if (!pcm)
230 		return -ENOMEM;
231 
232 	pcm->device = device;
233 	pcm->codec_dai = dai;
234 
235 	list_add_tail(&pcm->head, &ctx->hdmi_pcm_list);
236 
237 	return 0;
238 }
239 
240 static int kabylake_hdmi1_init(struct snd_soc_pcm_runtime *rtd)
241 {
242 	return kabylake_hdmi_init(rtd, KBL_DPCM_AUDIO_HDMI1_PB);
243 }
244 
245 static int kabylake_hdmi2_init(struct snd_soc_pcm_runtime *rtd)
246 {
247 	return kabylake_hdmi_init(rtd, KBL_DPCM_AUDIO_HDMI2_PB);
248 }
249 
250 static int kabylake_hdmi3_init(struct snd_soc_pcm_runtime *rtd)
251 {
252 	return kabylake_hdmi_init(rtd, KBL_DPCM_AUDIO_HDMI3_PB);
253 }
254 
255 static int kabylake_rt5660_hw_params(struct snd_pcm_substream *substream,
256 	struct snd_pcm_hw_params *params)
257 {
258 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
259 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
260 	int ret;
261 
262 	ret = snd_soc_dai_set_sysclk(codec_dai,
263 				     RT5660_SCLK_S_PLL1, params_rate(params) * 512,
264 				     SND_SOC_CLOCK_IN);
265 	if (ret < 0) {
266 		dev_err(rtd->dev, "snd_soc_dai_set_sysclk err = %d\n", ret);
267 		return ret;
268 	}
269 
270 	ret = snd_soc_dai_set_pll(codec_dai, 0,
271 				  RT5660_PLL1_S_BCLK,
272 				  params_rate(params) * 50,
273 				  params_rate(params) * 512);
274 	if (ret < 0)
275 		dev_err(codec_dai->dev, "can't set codec pll: %d\n", ret);
276 
277 	return ret;
278 }
279 
280 static struct snd_soc_ops kabylake_rt5660_ops = {
281 	.hw_params = kabylake_rt5660_hw_params,
282 };
283 
284 static const unsigned int rates[] = {
285 	48000,
286 };
287 
288 static const struct snd_pcm_hw_constraint_list constraints_rates = {
289 	.count = ARRAY_SIZE(rates),
290 	.list  = rates,
291 	.mask = 0,
292 };
293 
294 static const unsigned int channels[] = {
295 	DUAL_CHANNEL,
296 };
297 
298 static const struct snd_pcm_hw_constraint_list constraints_channels = {
299 	.count = ARRAY_SIZE(channels),
300 	.list = channels,
301 	.mask = 0,
302 };
303 
304 static int kbl_fe_startup(struct snd_pcm_substream *substream)
305 {
306 	struct snd_pcm_runtime *runtime = substream->runtime;
307 
308 	/*
309 	 * On this platform for PCM device we support,
310 	 * 48Khz
311 	 * stereo
312 	 * 16 bit audio
313 	 */
314 
315 	runtime->hw.channels_max = DUAL_CHANNEL;
316 	snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
317 					   &constraints_channels);
318 
319 	runtime->hw.formats = SNDRV_PCM_FMTBIT_S16_LE;
320 	snd_pcm_hw_constraint_msbits(runtime, 0, 16, 16);
321 
322 	snd_pcm_hw_constraint_list(runtime, 0,
323 				SNDRV_PCM_HW_PARAM_RATE, &constraints_rates);
324 
325 	return 0;
326 }
327 
328 static const struct snd_soc_ops kabylake_rt5660_fe_ops = {
329 	.startup = kbl_fe_startup,
330 };
331 
332 SND_SOC_DAILINK_DEF(dummy,
333 	DAILINK_COMP_ARRAY(COMP_DUMMY()));
334 
335 SND_SOC_DAILINK_DEF(system,
336 	DAILINK_COMP_ARRAY(COMP_CPU("System Pin")));
337 
338 SND_SOC_DAILINK_DEF(hdmi1,
339 	DAILINK_COMP_ARRAY(COMP_CPU("HDMI1 Pin")));
340 
341 SND_SOC_DAILINK_DEF(hdmi2,
342 	DAILINK_COMP_ARRAY(COMP_CPU("HDMI2 Pin")));
343 
344 SND_SOC_DAILINK_DEF(hdmi3,
345 	DAILINK_COMP_ARRAY(COMP_CPU("HDMI3 Pin")));
346 
347 SND_SOC_DAILINK_DEF(ssp0_pin,
348 	DAILINK_COMP_ARRAY(COMP_CPU("SSP0 Pin")));
349 SND_SOC_DAILINK_DEF(ssp0_codec,
350 	DAILINK_COMP_ARRAY(COMP_CODEC("i2c-10EC3277:00", KBL_RT5660_CODEC_DAI)));
351 
352 SND_SOC_DAILINK_DEF(idisp1_pin,
353 		    DAILINK_COMP_ARRAY(COMP_CPU("iDisp1 Pin")));
354 SND_SOC_DAILINK_DEF(idisp1_codec,
355 	DAILINK_COMP_ARRAY(COMP_CODEC("ehdaudio0D2", "intel-hdmi-hifi1")));
356 
357 SND_SOC_DAILINK_DEF(idisp2_pin,
358 	DAILINK_COMP_ARRAY(COMP_CPU("iDisp2 Pin")));
359 SND_SOC_DAILINK_DEF(idisp2_codec,
360 	DAILINK_COMP_ARRAY(COMP_CODEC("ehdaudio0D2", "intel-hdmi-hifi2")));
361 
362 SND_SOC_DAILINK_DEF(idisp3_pin,
363 	DAILINK_COMP_ARRAY(COMP_CPU("iDisp3 Pin")));
364 SND_SOC_DAILINK_DEF(idisp3_codec,
365 	DAILINK_COMP_ARRAY(COMP_CODEC("ehdaudio0D2", "intel-hdmi-hifi3")));
366 
367 SND_SOC_DAILINK_DEF(platform,
368 	DAILINK_COMP_ARRAY(COMP_PLATFORM("0000:00:1f.3")));
369 
370 /* kabylake digital audio interface glue - connects rt5660 codec <--> CPU */
371 static struct snd_soc_dai_link kabylake_rt5660_dais[] = {
372 	/* Front End DAI links */
373 	[KBL_DPCM_AUDIO_PB] = {
374 		.name = "Kbl Audio Port",
375 		.stream_name = "Audio",
376 		.dynamic = 1,
377 		.nonatomic = 1,
378 		.trigger = {
379 			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
380 		.dpcm_playback = 1,
381 		.ops = &kabylake_rt5660_fe_ops,
382 		SND_SOC_DAILINK_REG(system, dummy, platform),
383 	},
384 	[KBL_DPCM_AUDIO_CP] = {
385 		.name = "Kbl Audio Capture Port",
386 		.stream_name = "Audio Record",
387 		.dynamic = 1,
388 		.nonatomic = 1,
389 		.trigger = {
390 			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
391 		.dpcm_capture = 1,
392 		.ops = &kabylake_rt5660_fe_ops,
393 		SND_SOC_DAILINK_REG(system, dummy, platform),
394 	},
395 	[KBL_DPCM_AUDIO_HDMI1_PB] = {
396 		.name = "Kbl HDMI Port1",
397 		.stream_name = "Hdmi1",
398 		.dpcm_playback = 1,
399 		.init = NULL,
400 		.trigger = {
401 			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
402 		.nonatomic = 1,
403 		.dynamic = 1,
404 		SND_SOC_DAILINK_REG(hdmi1, dummy, platform),
405 	},
406 	[KBL_DPCM_AUDIO_HDMI2_PB] = {
407 		.name = "Kbl HDMI Port2",
408 		.stream_name = "Hdmi2",
409 		.dpcm_playback = 1,
410 		.init = NULL,
411 		.trigger = {
412 			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
413 		.nonatomic = 1,
414 		.dynamic = 1,
415 		SND_SOC_DAILINK_REG(hdmi2, dummy, platform),
416 	},
417 	[KBL_DPCM_AUDIO_HDMI3_PB] = {
418 		.name = "Kbl HDMI Port3",
419 		.stream_name = "Hdmi3",
420 		.trigger = {
421 			SND_SOC_DPCM_TRIGGER_POST, SND_SOC_DPCM_TRIGGER_POST},
422 		.dpcm_playback = 1,
423 		.init = NULL,
424 		.nonatomic = 1,
425 		.dynamic = 1,
426 		SND_SOC_DAILINK_REG(hdmi3, dummy, platform),
427 	},
428 
429 	/* Back End DAI links */
430 	{
431 		/* SSP0 - Codec */
432 		.name = "SSP0-Codec",
433 		.id = 0,
434 		.no_pcm = 1,
435 		.init = kabylake_rt5660_codec_init,
436 		.exit = kabylake_rt5660_codec_exit,
437 		.dai_fmt = SND_SOC_DAIFMT_I2S |
438 		SND_SOC_DAIFMT_NB_NF |
439 		SND_SOC_DAIFMT_CBS_CFS,
440 		.ignore_pmdown_time = 1,
441 		.be_hw_params_fixup = kabylake_ssp0_fixup,
442 		.ops = &kabylake_rt5660_ops,
443 		.dpcm_playback = 1,
444 		.dpcm_capture = 1,
445 		SND_SOC_DAILINK_REG(ssp0_pin, ssp0_codec, platform),
446 	},
447 	{
448 		.name = "iDisp1",
449 		.id = 1,
450 		.dpcm_playback = 1,
451 		.init = kabylake_hdmi1_init,
452 		.no_pcm = 1,
453 		SND_SOC_DAILINK_REG(idisp1_pin, idisp1_codec, platform),
454 	},
455 	{
456 		.name = "iDisp2",
457 		.id = 2,
458 		.init = kabylake_hdmi2_init,
459 		.dpcm_playback = 1,
460 		.no_pcm = 1,
461 		SND_SOC_DAILINK_REG(idisp2_pin, idisp2_codec, platform),
462 	},
463 	{
464 		.name = "iDisp3",
465 		.id = 3,
466 		.init = kabylake_hdmi3_init,
467 		.dpcm_playback = 1,
468 		.no_pcm = 1,
469 		SND_SOC_DAILINK_REG(idisp3_pin, idisp3_codec, platform),
470 	},
471 };
472 
473 
474 #define NAME_SIZE	32
475 static int kabylake_card_late_probe(struct snd_soc_card *card)
476 {
477 	struct kbl_codec_private *ctx = snd_soc_card_get_drvdata(card);
478 	struct kbl_hdmi_pcm *pcm;
479 	struct snd_soc_component *component = NULL;
480 	int err, i = 0;
481 	char jack_name[NAME_SIZE];
482 
483 	list_for_each_entry(pcm, &ctx->hdmi_pcm_list, head) {
484 		component = pcm->codec_dai->component;
485 		snprintf(jack_name, sizeof(jack_name),
486 			"HDMI/DP, pcm=%d Jack", pcm->device);
487 		err = snd_soc_card_jack_new(card, jack_name,
488 					SND_JACK_AVOUT, &skylake_hdmi[i],
489 					NULL, 0);
490 
491 		if (err)
492 			return err;
493 
494 		err = hdac_hdmi_jack_init(pcm->codec_dai, pcm->device,
495 				&skylake_hdmi[i]);
496 		if (err < 0)
497 			return err;
498 
499 		i++;
500 
501 	}
502 
503 	if (!component)
504 		return -EINVAL;
505 
506 	return hdac_hdmi_jack_port_init(component, &card->dapm);
507 }
508 
509 /* kabylake audio machine driver for rt5660 */
510 static struct snd_soc_card kabylake_audio_card_rt5660 = {
511 	.name = "kblrt5660",
512 	.owner = THIS_MODULE,
513 	.dai_link = kabylake_rt5660_dais,
514 	.num_links = ARRAY_SIZE(kabylake_rt5660_dais),
515 	.controls = kabylake_rt5660_controls,
516 	.num_controls = ARRAY_SIZE(kabylake_rt5660_controls),
517 	.dapm_widgets = kabylake_rt5660_widgets,
518 	.num_dapm_widgets = ARRAY_SIZE(kabylake_rt5660_widgets),
519 	.dapm_routes = kabylake_rt5660_map,
520 	.num_dapm_routes = ARRAY_SIZE(kabylake_rt5660_map),
521 	.fully_routed = true,
522 	.late_probe = kabylake_card_late_probe,
523 };
524 
525 static int kabylake_audio_probe(struct platform_device *pdev)
526 {
527 	struct kbl_codec_private *ctx;
528 
529 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
530 	if (!ctx)
531 		return -ENOMEM;
532 
533 	INIT_LIST_HEAD(&ctx->hdmi_pcm_list);
534 
535 	kabylake_audio_card =
536 		(struct snd_soc_card *)pdev->id_entry->driver_data;
537 
538 	kabylake_audio_card->dev = &pdev->dev;
539 	snd_soc_card_set_drvdata(kabylake_audio_card, ctx);
540 	return devm_snd_soc_register_card(&pdev->dev, kabylake_audio_card);
541 }
542 
543 static const struct platform_device_id kbl_board_ids[] = {
544 	{
545 		.name = "kbl_rt5660",
546 		.driver_data =
547 			(kernel_ulong_t)&kabylake_audio_card_rt5660,
548 	},
549 	{ }
550 };
551 
552 static struct platform_driver kabylake_audio = {
553 	.probe = kabylake_audio_probe,
554 	.driver = {
555 		.name = "kbl_rt5660",
556 		.pm = &snd_soc_pm_ops,
557 	},
558 	.id_table = kbl_board_ids,
559 };
560 
561 module_platform_driver(kabylake_audio)
562 
563 /* Module information */
564 MODULE_DESCRIPTION("Audio Machine driver-RT5660 in I2S mode");
565 MODULE_AUTHOR("Hui Wang <hui.wang@canonical.com>");
566 MODULE_LICENSE("GPL v2");
567 MODULE_ALIAS("platform:kbl_rt5660");
568