1 // SPDX-License-Identifier: GPL-2.0-only
3 * bytcht_es8316.c - ASoc Machine driver for Intel Baytrail/Cherrytrail
4 * platforms with Everest ES8316 SoC
6 * Copyright (C) 2017 Endless Mobile, Inc.
7 * Authors: David Yang <yangxiaohua@everest-semi.com>,
8 * Daniel Drake <drake@endlessm.com>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
14 #include <linux/acpi.h>
15 #include <linux/clk.h>
16 #include <linux/device.h>
17 #include <linux/dmi.h>
18 #include <linux/gpio/consumer.h>
19 #include <linux/i2c.h>
20 #include <linux/init.h>
21 #include <linux/input.h>
22 #include <linux/module.h>
23 #include <linux/platform_device.h>
24 #include <linux/slab.h>
25 #include <sound/jack.h>
26 #include <sound/pcm.h>
27 #include <sound/pcm_params.h>
28 #include <sound/soc.h>
29 #include <sound/soc-acpi.h>
30 #include "../atom/sst-atom-controls.h"
31 #include "../common/sst-dsp.h"
32 #include "../common/soc-intel-quirks.h"
34 /* jd-inv + terminating entry */
35 #define MAX_NO_PROPS 2
37 struct byt_cht_es8316_private
{
39 struct snd_soc_jack jack
;
40 struct gpio_desc
*speaker_en_gpio
;
45 BYT_CHT_ES8316_INTMIC_IN1_MAP
,
46 BYT_CHT_ES8316_INTMIC_IN2_MAP
,
49 #define BYT_CHT_ES8316_MAP(quirk) ((quirk) & GENMASK(3, 0))
50 #define BYT_CHT_ES8316_SSP0 BIT(16)
51 #define BYT_CHT_ES8316_MONO_SPEAKER BIT(17)
52 #define BYT_CHT_ES8316_JD_INVERTED BIT(18)
54 static unsigned long quirk
;
56 static int quirk_override
= -1;
57 module_param_named(quirk
, quirk_override
, int, 0444);
58 MODULE_PARM_DESC(quirk
, "Board-specific quirk override");
60 static void log_quirks(struct device
*dev
)
62 if (BYT_CHT_ES8316_MAP(quirk
) == BYT_CHT_ES8316_INTMIC_IN1_MAP
)
63 dev_info(dev
, "quirk IN1_MAP enabled");
64 if (BYT_CHT_ES8316_MAP(quirk
) == BYT_CHT_ES8316_INTMIC_IN2_MAP
)
65 dev_info(dev
, "quirk IN2_MAP enabled");
66 if (quirk
& BYT_CHT_ES8316_SSP0
)
67 dev_info(dev
, "quirk SSP0 enabled");
68 if (quirk
& BYT_CHT_ES8316_MONO_SPEAKER
)
69 dev_info(dev
, "quirk MONO_SPEAKER enabled\n");
70 if (quirk
& BYT_CHT_ES8316_JD_INVERTED
)
71 dev_info(dev
, "quirk JD_INVERTED enabled\n");
74 static int byt_cht_es8316_speaker_power_event(struct snd_soc_dapm_widget
*w
,
75 struct snd_kcontrol
*kcontrol
, int event
)
77 struct snd_soc_card
*card
= w
->dapm
->card
;
78 struct byt_cht_es8316_private
*priv
= snd_soc_card_get_drvdata(card
);
80 if (SND_SOC_DAPM_EVENT_ON(event
))
81 priv
->speaker_en
= true;
83 priv
->speaker_en
= false;
85 gpiod_set_value_cansleep(priv
->speaker_en_gpio
, priv
->speaker_en
);
90 static const struct snd_soc_dapm_widget byt_cht_es8316_widgets
[] = {
91 SND_SOC_DAPM_SPK("Speaker", NULL
),
92 SND_SOC_DAPM_HP("Headphone", NULL
),
93 SND_SOC_DAPM_MIC("Headset Mic", NULL
),
94 SND_SOC_DAPM_MIC("Internal Mic", NULL
),
96 SND_SOC_DAPM_SUPPLY("Speaker Power", SND_SOC_NOPM
, 0, 0,
97 byt_cht_es8316_speaker_power_event
,
98 SND_SOC_DAPM_PRE_PMD
| SND_SOC_DAPM_POST_PMU
),
101 static const struct snd_soc_dapm_route byt_cht_es8316_audio_map
[] = {
102 {"Headphone", NULL
, "HPOL"},
103 {"Headphone", NULL
, "HPOR"},
106 * There is no separate speaker output instead the speakers are muxed to
107 * the HP outputs. The mux is controlled by the "Speaker Power" supply.
109 {"Speaker", NULL
, "HPOL"},
110 {"Speaker", NULL
, "HPOR"},
111 {"Speaker", NULL
, "Speaker Power"},
114 static const struct snd_soc_dapm_route byt_cht_es8316_intmic_in1_map
[] = {
115 {"MIC1", NULL
, "Internal Mic"},
116 {"MIC2", NULL
, "Headset Mic"},
119 static const struct snd_soc_dapm_route byt_cht_es8316_intmic_in2_map
[] = {
120 {"MIC2", NULL
, "Internal Mic"},
121 {"MIC1", NULL
, "Headset Mic"},
124 static const struct snd_soc_dapm_route byt_cht_es8316_ssp0_map
[] = {
125 {"Playback", NULL
, "ssp0 Tx"},
126 {"ssp0 Tx", NULL
, "modem_out"},
127 {"modem_in", NULL
, "ssp0 Rx"},
128 {"ssp0 Rx", NULL
, "Capture"},
131 static const struct snd_soc_dapm_route byt_cht_es8316_ssp2_map
[] = {
132 {"Playback", NULL
, "ssp2 Tx"},
133 {"ssp2 Tx", NULL
, "codec_out0"},
134 {"ssp2 Tx", NULL
, "codec_out1"},
135 {"codec_in0", NULL
, "ssp2 Rx" },
136 {"codec_in1", NULL
, "ssp2 Rx" },
137 {"ssp2 Rx", NULL
, "Capture"},
140 static const struct snd_kcontrol_new byt_cht_es8316_controls
[] = {
141 SOC_DAPM_PIN_SWITCH("Speaker"),
142 SOC_DAPM_PIN_SWITCH("Headphone"),
143 SOC_DAPM_PIN_SWITCH("Headset Mic"),
144 SOC_DAPM_PIN_SWITCH("Internal Mic"),
147 static struct snd_soc_jack_pin byt_cht_es8316_jack_pins
[] = {
150 .mask
= SND_JACK_HEADPHONE
,
153 .pin
= "Headset Mic",
154 .mask
= SND_JACK_MICROPHONE
,
158 static int byt_cht_es8316_init(struct snd_soc_pcm_runtime
*runtime
)
160 struct snd_soc_component
*codec
= runtime
->codec_dai
->component
;
161 struct snd_soc_card
*card
= runtime
->card
;
162 struct byt_cht_es8316_private
*priv
= snd_soc_card_get_drvdata(card
);
163 const struct snd_soc_dapm_route
*custom_map
;
167 card
->dapm
.idle_bias_off
= true;
169 switch (BYT_CHT_ES8316_MAP(quirk
)) {
170 case BYT_CHT_ES8316_INTMIC_IN1_MAP
:
172 custom_map
= byt_cht_es8316_intmic_in1_map
;
173 num_routes
= ARRAY_SIZE(byt_cht_es8316_intmic_in1_map
);
175 case BYT_CHT_ES8316_INTMIC_IN2_MAP
:
176 custom_map
= byt_cht_es8316_intmic_in2_map
;
177 num_routes
= ARRAY_SIZE(byt_cht_es8316_intmic_in2_map
);
180 ret
= snd_soc_dapm_add_routes(&card
->dapm
, custom_map
, num_routes
);
184 if (quirk
& BYT_CHT_ES8316_SSP0
) {
185 custom_map
= byt_cht_es8316_ssp0_map
;
186 num_routes
= ARRAY_SIZE(byt_cht_es8316_ssp0_map
);
188 custom_map
= byt_cht_es8316_ssp2_map
;
189 num_routes
= ARRAY_SIZE(byt_cht_es8316_ssp2_map
);
191 ret
= snd_soc_dapm_add_routes(&card
->dapm
, custom_map
, num_routes
);
196 * The firmware might enable the clock at boot (this information
197 * may or may not be reflected in the enable clock register).
198 * To change the rate we must disable the clock first to cover these
199 * cases. Due to common clock framework restrictions that do not allow
200 * to disable a clock that has not been enabled, we need to enable
203 ret
= clk_prepare_enable(priv
->mclk
);
205 clk_disable_unprepare(priv
->mclk
);
207 ret
= clk_set_rate(priv
->mclk
, 19200000);
209 dev_err(card
->dev
, "unable to set MCLK rate\n");
211 ret
= clk_prepare_enable(priv
->mclk
);
213 dev_err(card
->dev
, "unable to enable MCLK\n");
215 ret
= snd_soc_dai_set_sysclk(runtime
->codec_dai
, 0, 19200000,
218 dev_err(card
->dev
, "can't set codec clock %d\n", ret
);
222 ret
= snd_soc_card_jack_new(card
, "Headset",
223 SND_JACK_HEADSET
| SND_JACK_BTN_0
,
224 &priv
->jack
, byt_cht_es8316_jack_pins
,
225 ARRAY_SIZE(byt_cht_es8316_jack_pins
));
227 dev_err(card
->dev
, "jack creation failed %d\n", ret
);
231 snd_jack_set_key(priv
->jack
.jack
, SND_JACK_BTN_0
, KEY_PLAYPAUSE
);
232 snd_soc_component_set_jack(codec
, &priv
->jack
, NULL
);
237 static const struct snd_soc_pcm_stream byt_cht_es8316_dai_params
= {
238 .formats
= SNDRV_PCM_FMTBIT_S24_LE
,
245 static int byt_cht_es8316_codec_fixup(struct snd_soc_pcm_runtime
*rtd
,
246 struct snd_pcm_hw_params
*params
)
248 struct snd_interval
*rate
= hw_param_interval(params
,
249 SNDRV_PCM_HW_PARAM_RATE
);
250 struct snd_interval
*channels
= hw_param_interval(params
,
251 SNDRV_PCM_HW_PARAM_CHANNELS
);
254 /* The DSP will covert the FE rate to 48k, stereo */
255 rate
->min
= rate
->max
= 48000;
256 channels
->min
= channels
->max
= 2;
258 if (quirk
& BYT_CHT_ES8316_SSP0
) {
259 /* set SSP0 to 16-bit */
260 params_set_format(params
, SNDRV_PCM_FORMAT_S16_LE
);
263 /* set SSP2 to 24-bit */
264 params_set_format(params
, SNDRV_PCM_FORMAT_S24_LE
);
269 * Default mode for SSP configuration is TDM 4 slot, override config
270 * with explicit setting to I2S 2ch 24-bit. The word length is set with
271 * dai_set_tdm_slot() since there is no other API exposed
273 ret
= snd_soc_dai_set_fmt(rtd
->cpu_dai
,
275 SND_SOC_DAIFMT_NB_NF
|
276 SND_SOC_DAIFMT_CBS_CFS
279 dev_err(rtd
->dev
, "can't set format to I2S, err %d\n", ret
);
283 ret
= snd_soc_dai_set_tdm_slot(rtd
->cpu_dai
, 0x3, 0x3, 2, bits
);
285 dev_err(rtd
->dev
, "can't set I2S config, err %d\n", ret
);
292 static int byt_cht_es8316_aif1_startup(struct snd_pcm_substream
*substream
)
294 return snd_pcm_hw_constraint_single(substream
->runtime
,
295 SNDRV_PCM_HW_PARAM_RATE
, 48000);
298 static const struct snd_soc_ops byt_cht_es8316_aif1_ops
= {
299 .startup
= byt_cht_es8316_aif1_startup
,
302 SND_SOC_DAILINK_DEF(dummy
,
303 DAILINK_COMP_ARRAY(COMP_DUMMY()));
305 SND_SOC_DAILINK_DEF(media
,
306 DAILINK_COMP_ARRAY(COMP_CPU("media-cpu-dai")));
308 SND_SOC_DAILINK_DEF(deepbuffer
,
309 DAILINK_COMP_ARRAY(COMP_CPU("deepbuffer-cpu-dai")));
311 SND_SOC_DAILINK_DEF(ssp2_port
,
312 DAILINK_COMP_ARRAY(COMP_CPU("ssp2-port")));
313 SND_SOC_DAILINK_DEF(ssp2_codec
,
314 DAILINK_COMP_ARRAY(COMP_CODEC("i2c-ESSX8316:00", "ES8316 HiFi")));
316 SND_SOC_DAILINK_DEF(platform
,
317 DAILINK_COMP_ARRAY(COMP_PLATFORM("sst-mfld-platform")));
319 static struct snd_soc_dai_link byt_cht_es8316_dais
[] = {
320 [MERR_DPCM_AUDIO
] = {
321 .name
= "Audio Port",
322 .stream_name
= "Audio",
327 .ops
= &byt_cht_es8316_aif1_ops
,
328 SND_SOC_DAILINK_REG(media
, dummy
, platform
),
331 [MERR_DPCM_DEEP_BUFFER
] = {
332 .name
= "Deep-Buffer Audio Port",
333 .stream_name
= "Deep-Buffer Audio",
337 .ops
= &byt_cht_es8316_aif1_ops
,
338 SND_SOC_DAILINK_REG(deepbuffer
, dummy
, platform
),
343 /* Only SSP2 has been tested here, so BYT-CR platforms that
344 * require SSP0 will not work.
346 .name
= "SSP2-Codec",
349 .dai_fmt
= SND_SOC_DAIFMT_I2S
| SND_SOC_DAIFMT_NB_NF
350 | SND_SOC_DAIFMT_CBS_CFS
,
351 .be_hw_params_fixup
= byt_cht_es8316_codec_fixup
,
355 .init
= byt_cht_es8316_init
,
356 SND_SOC_DAILINK_REG(ssp2_port
, ssp2_codec
, platform
),
362 static char codec_name
[SND_ACPI_I2C_ID_LEN
];
363 #if !IS_ENABLED(CONFIG_SND_SOC_INTEL_USER_FRIENDLY_LONG_NAMES)
364 static char long_name
[50]; /* = "bytcht-es8316-*-spk-*-mic" */
366 static char components_string
[32]; /* = "cfg-spk:* cfg-mic:* */
368 static int byt_cht_es8316_suspend(struct snd_soc_card
*card
)
370 struct snd_soc_component
*component
;
372 for_each_card_components(card
, component
) {
373 if (!strcmp(component
->name
, codec_name
)) {
374 dev_dbg(component
->dev
, "disabling jack detect before suspend\n");
375 snd_soc_component_set_jack(component
, NULL
, NULL
);
383 static int byt_cht_es8316_resume(struct snd_soc_card
*card
)
385 struct byt_cht_es8316_private
*priv
= snd_soc_card_get_drvdata(card
);
386 struct snd_soc_component
*component
;
388 for_each_card_components(card
, component
) {
389 if (!strcmp(component
->name
, codec_name
)) {
390 dev_dbg(component
->dev
, "re-enabling jack detect after resume\n");
391 snd_soc_component_set_jack(component
, &priv
->jack
, NULL
);
397 * Some Cherry Trail boards with an ES8316 codec have a bug in their
398 * ACPI tables where the MSSL1680 touchscreen's _PS0 and _PS3 methods
399 * wrongly also set the speaker-enable GPIO to 1/0. Testing has shown
400 * that this really is a bug and the GPIO has no influence on the
401 * touchscreen at all.
403 * The silead.c touchscreen driver does not support runtime suspend, so
404 * the GPIO can only be changed underneath us during a system suspend.
405 * This resume() function runs from a pm complete() callback, and thus
406 * is guaranteed to run after the touchscreen driver/ACPI-subsys has
407 * brought the touchscreen back up again (and thus changed the GPIO).
409 * So to work around this we pass GPIOD_FLAGS_BIT_NONEXCLUSIVE when
410 * requesting the GPIO and we set its value here to undo any changes
411 * done by the touchscreen's broken _PS0 ACPI method.
413 gpiod_set_value_cansleep(priv
->speaker_en_gpio
, priv
->speaker_en
);
418 static struct snd_soc_card byt_cht_es8316_card
= {
419 .name
= "bytcht-es8316",
420 .owner
= THIS_MODULE
,
421 .dai_link
= byt_cht_es8316_dais
,
422 .num_links
= ARRAY_SIZE(byt_cht_es8316_dais
),
423 .dapm_widgets
= byt_cht_es8316_widgets
,
424 .num_dapm_widgets
= ARRAY_SIZE(byt_cht_es8316_widgets
),
425 .dapm_routes
= byt_cht_es8316_audio_map
,
426 .num_dapm_routes
= ARRAY_SIZE(byt_cht_es8316_audio_map
),
427 .controls
= byt_cht_es8316_controls
,
428 .num_controls
= ARRAY_SIZE(byt_cht_es8316_controls
),
429 .fully_routed
= true,
430 .suspend_pre
= byt_cht_es8316_suspend
,
431 .resume_post
= byt_cht_es8316_resume
,
434 static const struct acpi_gpio_params first_gpio
= { 0, 0, false };
436 static const struct acpi_gpio_mapping byt_cht_es8316_gpios
[] = {
437 { "speaker-enable-gpios", &first_gpio
, 1 },
441 /* Please keep this list alphabetically sorted */
442 static const struct dmi_system_id byt_cht_es8316_quirk_table
[] = {
445 DMI_MATCH(DMI_SYS_VENDOR
, "IRBIS"),
446 DMI_MATCH(DMI_PRODUCT_NAME
, "NB41"),
448 .driver_data
= (void *)(BYT_CHT_ES8316_SSP0
449 | BYT_CHT_ES8316_INTMIC_IN2_MAP
450 | BYT_CHT_ES8316_JD_INVERTED
),
452 { /* Teclast X98 Plus II */
454 DMI_MATCH(DMI_SYS_VENDOR
, "TECLAST"),
455 DMI_MATCH(DMI_PRODUCT_NAME
, "X98 Plus II"),
457 .driver_data
= (void *)(BYT_CHT_ES8316_INTMIC_IN1_MAP
458 | BYT_CHT_ES8316_JD_INVERTED
),
463 static int snd_byt_cht_es8316_mc_probe(struct platform_device
*pdev
)
465 static const char * const mic_name
[] = { "in1", "in2" };
466 struct property_entry props
[MAX_NO_PROPS
] = {};
467 struct byt_cht_es8316_private
*priv
;
468 const struct dmi_system_id
*dmi_id
;
469 struct device
*dev
= &pdev
->dev
;
470 struct snd_soc_acpi_mach
*mach
;
471 const char *platform_name
;
472 struct acpi_device
*adev
;
473 struct device
*codec_dev
;
474 unsigned int cnt
= 0;
479 priv
= devm_kzalloc(dev
, sizeof(*priv
), GFP_KERNEL
);
483 mach
= dev
->platform_data
;
484 /* fix index of codec dai */
485 for (i
= 0; i
< ARRAY_SIZE(byt_cht_es8316_dais
); i
++) {
486 if (!strcmp(byt_cht_es8316_dais
[i
].codecs
->name
,
487 "i2c-ESSX8316:00")) {
493 /* fixup codec name based on HID */
494 adev
= acpi_dev_get_first_match_dev(mach
->id
, NULL
, -1);
496 snprintf(codec_name
, sizeof(codec_name
),
497 "i2c-%s", acpi_dev_name(adev
));
498 put_device(&adev
->dev
);
499 byt_cht_es8316_dais
[dai_index
].codecs
->name
= codec_name
;
502 /* override plaform name, if required */
503 byt_cht_es8316_card
.dev
= dev
;
504 platform_name
= mach
->mach_params
.platform
;
506 ret
= snd_soc_fixup_dai_links_platform_name(&byt_cht_es8316_card
,
511 /* Check for BYTCR or other platform and setup quirks */
512 dmi_id
= dmi_first_match(byt_cht_es8316_quirk_table
);
514 quirk
= (unsigned long)dmi_id
->driver_data
;
515 } else if (soc_intel_is_byt() &&
516 mach
->mach_params
.acpi_ipc_irq_index
== 0) {
517 /* On BYTCR default to SSP0, internal-mic-in2-map, mono-spk */
518 quirk
= BYT_CHT_ES8316_SSP0
| BYT_CHT_ES8316_INTMIC_IN2_MAP
|
519 BYT_CHT_ES8316_MONO_SPEAKER
;
521 /* Others default to internal-mic-in1-map, mono-speaker */
522 quirk
= BYT_CHT_ES8316_INTMIC_IN1_MAP
|
523 BYT_CHT_ES8316_MONO_SPEAKER
;
525 if (quirk_override
!= -1) {
526 dev_info(dev
, "Overriding quirk 0x%x => 0x%x\n",
529 quirk
= quirk_override
;
533 if (quirk
& BYT_CHT_ES8316_SSP0
)
534 byt_cht_es8316_dais
[dai_index
].cpus
->dai_name
= "ssp0-port";
537 priv
->mclk
= devm_clk_get(dev
, "pmc_plt_clk_3");
538 if (IS_ERR(priv
->mclk
)) {
539 ret
= PTR_ERR(priv
->mclk
);
540 dev_err(dev
, "clk_get pmc_plt_clk_3 failed: %d\n", ret
);
544 /* get speaker enable GPIO */
545 codec_dev
= bus_find_device_by_name(&i2c_bus_type
, NULL
, codec_name
);
547 return -EPROBE_DEFER
;
549 if (quirk
& BYT_CHT_ES8316_JD_INVERTED
)
550 props
[cnt
++] = PROPERTY_ENTRY_BOOL("everest,jack-detect-inverted");
553 ret
= device_add_properties(codec_dev
, props
);
558 devm_acpi_dev_add_driver_gpios(codec_dev
, byt_cht_es8316_gpios
);
559 priv
->speaker_en_gpio
=
560 gpiod_get_index(codec_dev
, "speaker-enable", 0,
561 /* see comment in byt_cht_es8316_resume */
562 GPIOD_OUT_LOW
| GPIOD_FLAGS_BIT_NONEXCLUSIVE
);
563 put_device(codec_dev
);
565 if (IS_ERR(priv
->speaker_en_gpio
)) {
566 ret
= PTR_ERR(priv
->speaker_en_gpio
);
569 priv
->speaker_en_gpio
= NULL
;
572 dev_err(dev
, "get speaker GPIO failed: %d\n", ret
);
579 snprintf(components_string
, sizeof(components_string
),
580 "cfg-spk:%s cfg-mic:%s",
581 (quirk
& BYT_CHT_ES8316_MONO_SPEAKER
) ? "1" : "2",
582 mic_name
[BYT_CHT_ES8316_MAP(quirk
)]);
583 byt_cht_es8316_card
.components
= components_string
;
584 #if !IS_ENABLED(CONFIG_SND_SOC_INTEL_USER_FRIENDLY_LONG_NAMES)
585 snprintf(long_name
, sizeof(long_name
), "bytcht-es8316-%s-spk-%s-mic",
586 (quirk
& BYT_CHT_ES8316_MONO_SPEAKER
) ? "mono" : "stereo",
587 mic_name
[BYT_CHT_ES8316_MAP(quirk
)]);
588 byt_cht_es8316_card
.long_name
= long_name
;
591 /* register the soc card */
592 snd_soc_card_set_drvdata(&byt_cht_es8316_card
, priv
);
594 ret
= devm_snd_soc_register_card(dev
, &byt_cht_es8316_card
);
596 gpiod_put(priv
->speaker_en_gpio
);
597 dev_err(dev
, "snd_soc_register_card failed: %d\n", ret
);
600 platform_set_drvdata(pdev
, &byt_cht_es8316_card
);
604 static int snd_byt_cht_es8316_mc_remove(struct platform_device
*pdev
)
606 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
607 struct byt_cht_es8316_private
*priv
= snd_soc_card_get_drvdata(card
);
609 gpiod_put(priv
->speaker_en_gpio
);
613 static struct platform_driver snd_byt_cht_es8316_mc_driver
= {
615 .name
= "bytcht_es8316",
617 .probe
= snd_byt_cht_es8316_mc_probe
,
618 .remove
= snd_byt_cht_es8316_mc_remove
,
621 module_platform_driver(snd_byt_cht_es8316_mc_driver
);
622 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail/Cherrytrail Machine driver");
623 MODULE_AUTHOR("David Yang <yangxiaohua@everest-semi.com>");
624 MODULE_LICENSE("GPL v2");
625 MODULE_ALIAS("platform:bytcht_es8316");