1 From 3fb73fd6dd7fc8bb8d2b282de1856967d7af0099 Mon Sep 17 00:00:00 2001
2 From: escalator2015 <jmtasende@gmail.com>
3 Date: Tue, 24 May 2016 16:20:09 +0100
4 Subject: [PATCH 367/381] New driver for RRA DigiDAC1 soundcard using WM8741 +
8 arch/arm/boot/dts/overlays/Makefile | 1 +
9 arch/arm/boot/dts/overlays/README | 6 +
10 .../overlays/rra-digidac1-wm8741-audio-overlay.dts | 81 ++++
11 arch/arm/configs/bcm2709_defconfig | 1 +
12 arch/arm/configs/bcmrpi_defconfig | 1 +
13 sound/soc/bcm/Kconfig | 8 +
14 sound/soc/bcm/Makefile | 2 +
15 sound/soc/bcm/digidac1-soundcard.c | 422 +++++++++++++++++++++
16 8 files changed, 522 insertions(+)
17 create mode 100644 arch/arm/boot/dts/overlays/rra-digidac1-wm8741-audio-overlay.dts
18 create mode 100644 sound/soc/bcm/digidac1-soundcard.c
20 --- a/arch/arm/boot/dts/overlays/Makefile
21 +++ b/arch/arm/boot/dts/overlays/Makefile
22 @@ -67,6 +67,7 @@ dtbo-$(RPI_DT_OVERLAYS) += rpi-display.d
23 dtbo-$(RPI_DT_OVERLAYS) += rpi-ft5406.dtbo
24 dtbo-$(RPI_DT_OVERLAYS) += rpi-proto.dtbo
25 dtbo-$(RPI_DT_OVERLAYS) += rpi-sense.dtbo
26 +dtbo-$(RPI_DT_OVERLAYS) += rra-digidac1-wm8741-audio.dtbo
27 dtbo-$(RPI_DT_OVERLAYS) += sdhost.dtbo
28 dtbo-$(RPI_DT_OVERLAYS) += sdio.dtbo
29 dtbo-$(RPI_DT_OVERLAYS) += sdio-1bit.dtbo
30 --- a/arch/arm/boot/dts/overlays/README
31 +++ b/arch/arm/boot/dts/overlays/README
32 @@ -842,6 +842,12 @@ Load: dtoverlay=rpi-sense
36 +Name: rra-digidac1-wm8741-audio
37 +Info: Configures the Red Rocks Audio DigiDAC1 soundcard
38 +Load: dtoverlay=rra-digidac1-wm8741-audio
43 Info: Selects the bcm2835-sdhost SD/MMC driver, optionally with overclock.
44 N.B. This overlay is designed for situations where the mmc driver is
46 +++ b/arch/arm/boot/dts/overlays/rra-digidac1-wm8741-audio-overlay.dts
48 +// Definitions for RRA DigiDAC1 Audio card
53 + compatible = "brcm,bcm2708";
66 + target-path = "/soc";
70 + compatible = "regulator-fixed";
71 + regulator-name = "DC_5V";
72 + regulator-min-microvolt = <5000000>;
73 + regulator-max-microvolt = <5000000>;
74 + regulator-always-on;
78 + compatible = "regulator-fixed";
79 + regulator-name = "DC_3V3";
80 + regulator-min-microvolt = <3300000>;
81 + regulator-max-microvolt = <3300000>;
82 + regulator-always-on;
97 + #address-cells = <1>;
102 + #sound-dai-cells = <0>;
103 + compatible = "wlf,wm8804";
106 + PVDD-supply = <&ldo0>;
107 + DVDD-supply = <&ldo0>;
110 + wm8742: wm8741@1a {
111 + compatible = "wlf,wm8741";
114 + AVDD-supply = <&ldo1>;
115 + DVDD-supply = <&ldo0>;
123 + compatible = "rra,digidac1-soundcard";
124 + i2s-controller = <&i2s>;
129 --- a/arch/arm/configs/bcm2709_defconfig
130 +++ b/arch/arm/configs/bcm2709_defconfig
131 @@ -866,6 +866,7 @@ CONFIG_SND_BCM2708_SOC_JUSTBOOM_DIGI=m
132 CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
133 CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
134 CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
135 +CONFIG_SND_DIGIDAC1_SOUNDCARD=m
136 CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
137 CONFIG_SND_SOC_ADAU1701=m
138 CONFIG_SND_SOC_WM8804_I2C=m
139 --- a/arch/arm/configs/bcmrpi_defconfig
140 +++ b/arch/arm/configs/bcmrpi_defconfig
141 @@ -858,6 +858,7 @@ CONFIG_SND_BCM2708_SOC_JUSTBOOM_DIGI=m
142 CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC=m
143 CONFIG_SND_BCM2708_SOC_RASPIDAC3=m
144 CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD=m
145 +CONFIG_SND_DIGIDAC1_SOUNDCARD=m
146 CONFIG_SND_BCM2708_SOC_ADAU1977_ADC=m
147 CONFIG_SND_SOC_ADAU1701=m
148 CONFIG_SND_SOC_WM8804_I2C=m
149 --- a/sound/soc/bcm/Kconfig
150 +++ b/sound/soc/bcm/Kconfig
151 @@ -92,3 +92,11 @@ config SND_AUDIOINJECTOR_PI_SOUNDCARD
152 select SND_SOC_WM8731
154 Say Y or M if you want to add support for audioinjector.net Pi Hat
156 +config SND_DIGIDAC1_SOUNDCARD
157 + tristate "Support for Red Rocks Audio DigiDAC1"
158 + depends on SND_BCM2708_SOC_I2S || SND_BCM2835_SOC_I2S
159 + select SND_SOC_WM8804
160 + select SND_SOC_WM8741
162 + Say Y or M if you want to add support for Red Rocks Audio DigiDAC1 board.
163 --- a/sound/soc/bcm/Makefile
164 +++ b/sound/soc/bcm/Makefile
165 @@ -16,6 +16,7 @@ snd-soc-rpi-proto-objs := rpi-proto.o
166 snd-soc-iqaudio-dac-objs := iqaudio-dac.o
167 snd-soc-raspidac3-objs := raspidac3.o
168 snd-soc-audioinjector-pi-soundcard-objs := audioinjector-pi-soundcard.o
169 +snd-soc-digidac1-soundcard-objs := digidac1-soundcard.o
171 obj-$(CONFIG_SND_BCM2708_SOC_ADAU1977_ADC) += snd-soc-adau1977-adc.o
172 obj-$(CONFIG_SND_BCM2708_SOC_HIFIBERRY_DAC) += snd-soc-hifiberry-dac.o
173 @@ -29,4 +30,5 @@ obj-$(CONFIG_SND_BCM2708_SOC_RPI_PROTO)
174 obj-$(CONFIG_SND_BCM2708_SOC_IQAUDIO_DAC) += snd-soc-iqaudio-dac.o
175 obj-$(CONFIG_SND_BCM2708_SOC_RASPIDAC3) += snd-soc-raspidac3.o
176 obj-$(CONFIG_SND_AUDIOINJECTOR_PI_SOUNDCARD) += snd-soc-audioinjector-pi-soundcard.o
177 +obj-$(CONFIG_SND_DIGIDAC1_SOUNDCARD) += snd-soc-digidac1-soundcard.o
180 +++ b/sound/soc/bcm/digidac1-soundcard.c
183 + * ASoC Driver for RRA DigiDAC1
185 + * Author: José M. Tasende <vintage@redrocksaudio.es>
186 + * based on the HifiBerry DAC driver by Florian Meier <florian.meier@koalo.de>
187 + * and the Wolfson card driver by Nikesh Oswal, <Nikesh.Oswal@wolfsonmicro.com>
188 + * This program is free software; you can redistribute it and/or
189 + * modify it under the terms of the GNU General Public License
190 + * version 2 as published by the Free Software Foundation.
192 + * This program is distributed in the hope that it will be useful, but
193 + * WITHOUT ANY WARRANTY; without even the implied warranty of
194 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
195 + * General Public License for more details.
198 +#include <linux/module.h>
199 +#include <linux/platform_device.h>
200 +#include <linux/i2c.h>
201 +#include <sound/core.h>
202 +#include <sound/pcm.h>
203 +#include <sound/pcm_params.h>
204 +#include <sound/soc.h>
205 +#include <sound/jack.h>
206 +#include <sound/soc-dapm.h>
207 +#include <sound/tlv.h>
208 +#include <linux/regulator/consumer.h>
210 +#include "../codecs/wm8804.h"
211 +#include "../codecs/wm8741.h"
213 +#define WM8741_NUM_SUPPLIES 2
215 +/* codec private data */
216 +struct wm8741_priv {
217 + struct wm8741_platform_data pdata;
218 + struct regmap *regmap;
219 + struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
220 + unsigned int sysclk;
221 + const struct snd_pcm_hw_constraint_list *sysclk_constraints;
224 +static int samplerate = 44100;
226 +/* New Alsa Controls not exposed by original wm8741 codec driver */
227 +/* in actual driver the att. adjustment is wrong because */
228 +/* this DAC has a coarse attenuation register with 4dB steps */
229 +/* and a fine level register with 0.125dB steps */
230 +/* each register has 32 steps so combining both we have 1024 steps */
232 +/* The original level controls from driver are removed at startup */
233 +/* and replaced by the corrected ones. */
234 +/* The same wm8741 driver can be used for wm8741 and wm8742 devices */
236 +static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, 0, 13, 0);
237 +static const DECLARE_TLV_DB_SCALE(dac_tlv_coarse, -12700, 400, 1);
238 +static const char *w8741_dither[4] = {"Off", "RPDF", "TPDF", "HPDF"};
239 +static const char *w8741_filter[5] = {
240 + "Type 1", "Type 2", "Type 3", "Type 4", "Type 5"};
241 +static const char *w8741_switch[2] = {"Off", "On"};
242 +static const struct soc_enum w8741_enum[] = {
243 +SOC_ENUM_SINGLE(WM8741_MODE_CONTROL_2, 0, 4, w8741_dither),/* dithering type */
244 +SOC_ENUM_SINGLE(WM8741_FILTER_CONTROL, 0, 5, w8741_filter),/* filter type */
245 +SOC_ENUM_SINGLE(WM8741_FORMAT_CONTROL, 6, 2, w8741_switch),/* phase invert */
246 +SOC_ENUM_SINGLE(WM8741_VOLUME_CONTROL, 0, 2, w8741_switch),/* volume ramp */
247 +SOC_ENUM_SINGLE(WM8741_VOLUME_CONTROL, 3, 2, w8741_switch),/* soft mute */
250 +static const struct snd_kcontrol_new w8741_snd_controls_stereo[] = {
251 +SOC_DOUBLE_R_TLV("DAC Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
252 + WM8741_DACRLSB_ATTENUATION, 0, 31, 1, dac_tlv_fine),
253 +SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8741_DACLMSB_ATTENUATION,
254 + WM8741_DACRMSB_ATTENUATION, 0, 31, 1, dac_tlv_coarse),
255 +SOC_ENUM("DAC Dither", w8741_enum[0]),
256 +SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
257 +SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
258 +SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
259 +SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
262 +static const struct snd_kcontrol_new w8741_snd_controls_mono_left[] = {
263 +SOC_SINGLE_TLV("DAC Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
264 + 0, 31, 0, dac_tlv_fine),
265 +SOC_SINGLE_TLV("Digital Playback Volume", WM8741_DACLMSB_ATTENUATION,
266 + 0, 31, 1, dac_tlv_coarse),
267 +SOC_ENUM("DAC Dither", w8741_enum[0]),
268 +SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
269 +SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
270 +SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
271 +SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
274 +static const struct snd_kcontrol_new w8741_snd_controls_mono_right[] = {
275 +SOC_SINGLE_TLV("DAC Fine Playback Volume", WM8741_DACRLSB_ATTENUATION,
276 + 0, 31, 0, dac_tlv_fine),
277 +SOC_SINGLE_TLV("Digital Playback Volume", WM8741_DACRMSB_ATTENUATION,
278 + 0, 31, 1, dac_tlv_coarse),
279 +SOC_ENUM("DAC Dither", w8741_enum[0]),
280 +SOC_ENUM("DAC Digital Filter", w8741_enum[1]),
281 +SOC_ENUM("DAC Phase Invert", w8741_enum[2]),
282 +SOC_ENUM("DAC Volume Ramp", w8741_enum[3]),
283 +SOC_ENUM("DAC Soft Mute", w8741_enum[4]),
286 +static int w8741_add_controls(struct snd_soc_codec *codec)
288 + struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
290 + switch (wm8741->pdata.diff_mode) {
291 + case WM8741_DIFF_MODE_STEREO:
292 + case WM8741_DIFF_MODE_STEREO_REVERSED:
293 + snd_soc_add_codec_controls(codec,
294 + w8741_snd_controls_stereo,
295 + ARRAY_SIZE(w8741_snd_controls_stereo));
297 + case WM8741_DIFF_MODE_MONO_LEFT:
298 + snd_soc_add_codec_controls(codec,
299 + w8741_snd_controls_mono_left,
300 + ARRAY_SIZE(w8741_snd_controls_mono_left));
302 + case WM8741_DIFF_MODE_MONO_RIGHT:
303 + snd_soc_add_codec_controls(codec,
304 + w8741_snd_controls_mono_right,
305 + ARRAY_SIZE(w8741_snd_controls_mono_right));
314 +static int digidac1_soundcard_init(struct snd_soc_pcm_runtime *rtd)
316 + struct snd_soc_codec *codec = rtd->codec;
317 + struct snd_soc_card *card = rtd->card;
318 + struct snd_soc_pcm_runtime *wm8741_rtd;
319 + struct snd_soc_codec *wm8741_codec;
320 + struct snd_card *sound_card = card->snd_card;
321 + struct snd_kcontrol *kctl;
324 + wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
326 + dev_warn(card->dev, "digidac1_soundcard_init: couldn't get wm8741 rtd\n");
329 + wm8741_codec = wm8741_rtd->codec;
330 + ret = w8741_add_controls(wm8741_codec);
332 + dev_warn(card->dev, "Failed to add new wm8741 controls: %d\n",
335 + /* enable TX output */
336 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
338 + kctl = snd_soc_card_get_kcontrol(card,
339 + "Playback Volume");
341 + kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
342 + snd_ctl_remove(sound_card, kctl);
344 + kctl = snd_soc_card_get_kcontrol(card,
345 + "Fine Playback Volume");
347 + kctl->vd[0].access = SNDRV_CTL_ELEM_ACCESS_READWRITE;
348 + snd_ctl_remove(sound_card, kctl);
353 +static int digidac1_soundcard_startup(struct snd_pcm_substream *substream)
355 + /* turn on wm8804 digital output */
356 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
357 + struct snd_soc_codec *codec = rtd->codec;
358 + struct snd_soc_card *card = rtd->card;
359 + struct snd_soc_pcm_runtime *wm8741_rtd;
360 + struct snd_soc_codec *wm8741_codec;
362 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x00);
363 + wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
365 + dev_warn(card->dev, "digidac1_soundcard_startup: couldn't get WM8741 rtd\n");
368 + wm8741_codec = wm8741_rtd->codec;
370 + /* latch wm8741 level */
371 + snd_soc_update_bits(wm8741_codec, WM8741_DACLLSB_ATTENUATION,
372 + WM8741_UPDATELL, WM8741_UPDATELL);
373 + snd_soc_update_bits(wm8741_codec, WM8741_DACLMSB_ATTENUATION,
374 + WM8741_UPDATELM, WM8741_UPDATELM);
375 + snd_soc_update_bits(wm8741_codec, WM8741_DACRLSB_ATTENUATION,
376 + WM8741_UPDATERL, WM8741_UPDATERL);
377 + snd_soc_update_bits(wm8741_codec, WM8741_DACRMSB_ATTENUATION,
378 + WM8741_UPDATERM, WM8741_UPDATERM);
383 +static void digidac1_soundcard_shutdown(struct snd_pcm_substream *substream)
385 + /* turn off wm8804 digital output */
386 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
387 + struct snd_soc_codec *codec = rtd->codec;
389 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x3c, 0x3c);
392 +static int digidac1_soundcard_hw_params(struct snd_pcm_substream *substream,
393 + struct snd_pcm_hw_params *params)
395 + struct snd_soc_pcm_runtime *rtd = substream->private_data;
396 + struct snd_soc_dai *codec_dai = rtd->codec_dai;
397 + struct snd_soc_codec *codec = rtd->codec;
398 + struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
399 + struct snd_soc_card *card = rtd->card;
400 + struct snd_soc_pcm_runtime *wm8741_rtd;
401 + struct snd_soc_codec *wm8741_codec;
403 + int sysclk = 27000000;
404 + long mclk_freq = 0;
406 + int sampling_freq = 1;
409 + wm8741_rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
411 + dev_warn(card->dev, "digidac1_soundcard_hw_params: couldn't get WM8741 rtd\n");
414 + wm8741_codec = wm8741_rtd->codec;
415 + samplerate = params_rate(params);
417 + if (samplerate <= 96000) {
418 + mclk_freq = samplerate*256;
419 + mclk_div = WM8804_MCLKDIV_256FS;
421 + mclk_freq = samplerate*128;
422 + mclk_div = WM8804_MCLKDIV_128FS;
425 + switch (samplerate) {
427 + sampling_freq = 0x03;
430 + sampling_freq = 0x00;
433 + sampling_freq = 0x02;
436 + sampling_freq = 0x08;
439 + sampling_freq = 0x0a;
442 + sampling_freq = 0x0c;
445 + sampling_freq = 0x0e;
448 + dev_err(codec->dev,
449 + "Failed to set WM8804 SYSCLK, unsupported samplerate %d\n",
453 + snd_soc_dai_set_clkdiv(codec_dai, WM8804_MCLK_DIV, mclk_div);
454 + snd_soc_dai_set_pll(codec_dai, 0, 0, sysclk, mclk_freq);
456 + ret = snd_soc_dai_set_sysclk(codec_dai, WM8804_TX_CLKSRC_PLL,
457 + sysclk, SND_SOC_CLOCK_OUT);
459 + dev_err(codec->dev,
460 + "Failed to set WM8804 SYSCLK: %d\n", ret);
463 + /* Enable wm8804 TX output */
464 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x0);
466 + /* wm8804 Power on */
467 + snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
469 + /* wm8804 set sampling frequency status bits */
470 + snd_soc_update_bits(codec, WM8804_SPDTX4, 0x0f, sampling_freq);
472 + /* Now update wm8741 registers for the correct oversampling */
473 + if (samplerate <= 48000)
474 + snd_soc_update_bits(wm8741_codec, WM8741_MODE_CONTROL_1,
475 + WM8741_OSR_MASK, 0x00);
476 + else if (samplerate <= 96000)
477 + snd_soc_update_bits(wm8741_codec, WM8741_MODE_CONTROL_1,
478 + WM8741_OSR_MASK, 0x20);
480 + snd_soc_update_bits(wm8741_codec, WM8741_MODE_CONTROL_1,
481 + WM8741_OSR_MASK, 0x40);
483 + /* wm8741 bit size */
484 + switch (params_width(params)) {
486 + snd_soc_update_bits(wm8741_codec, WM8741_FORMAT_CONTROL,
487 + WM8741_IWL_MASK, 0x00);
490 + snd_soc_update_bits(wm8741_codec, WM8741_FORMAT_CONTROL,
491 + WM8741_IWL_MASK, 0x01);
494 + snd_soc_update_bits(wm8741_codec, WM8741_FORMAT_CONTROL,
495 + WM8741_IWL_MASK, 0x02);
498 + snd_soc_update_bits(wm8741_codec, WM8741_FORMAT_CONTROL,
499 + WM8741_IWL_MASK, 0x03);
502 + dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
503 + params_width(params));
507 + return snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
509 +/* machine stream operations */
510 +static struct snd_soc_ops digidac1_soundcard_ops = {
511 + .hw_params = digidac1_soundcard_hw_params,
512 + .startup = digidac1_soundcard_startup,
513 + .shutdown = digidac1_soundcard_shutdown,
516 +static struct snd_soc_dai_link digidac1_soundcard_dai[] = {
518 + .name = "RRA DigiDAC1",
519 + .stream_name = "RRA DigiDAC1 HiFi",
520 + .cpu_dai_name = "bcm2708-i2s.0",
521 + .codec_dai_name = "wm8804-spdif",
522 + .platform_name = "bcm2708-i2s.0",
523 + .codec_name = "wm8804.1-003b",
524 + .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
525 + SND_SOC_DAIFMT_CBM_CFM,
526 + .ops = &digidac1_soundcard_ops,
527 + .init = digidac1_soundcard_init,
530 + .name = "RRA DigiDAC11",
531 + .stream_name = "RRA DigiDAC11 HiFi",
532 + .cpu_dai_name = "wm8804-spdif",
533 + .codec_dai_name = "wm8741",
534 + .codec_name = "wm8741.1-001a",
535 + .dai_fmt = SND_SOC_DAIFMT_I2S
536 + | SND_SOC_DAIFMT_NB_NF
537 + | SND_SOC_DAIFMT_CBS_CFS,
541 +/* audio machine driver */
542 +static struct snd_soc_card digidac1_soundcard = {
543 + .name = "digidac1-soundcard",
544 + .owner = THIS_MODULE,
545 + .dai_link = digidac1_soundcard_dai,
546 + .num_links = ARRAY_SIZE(digidac1_soundcard_dai),
549 +static int digidac1_soundcard_probe(struct platform_device *pdev)
553 + digidac1_soundcard.dev = &pdev->dev;
555 + if (pdev->dev.of_node) {
556 + struct device_node *i2s_node;
557 + struct snd_soc_dai_link *dai = &digidac1_soundcard_dai[0];
559 + i2s_node = of_parse_phandle(pdev->dev.of_node,
560 + "i2s-controller", 0);
563 + dai->cpu_dai_name = NULL;
564 + dai->cpu_of_node = i2s_node;
565 + dai->platform_name = NULL;
566 + dai->platform_of_node = i2s_node;
570 + ret = snd_soc_register_card(&digidac1_soundcard);
572 + dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
578 +static int digidac1_soundcard_remove(struct platform_device *pdev)
580 + return snd_soc_unregister_card(&digidac1_soundcard);
583 +static const struct of_device_id digidac1_soundcard_of_match[] = {
584 + { .compatible = "rra,digidac1-soundcard", },
587 +MODULE_DEVICE_TABLE(of, digidac1_soundcard_of_match);
589 +static struct platform_driver digidac1_soundcard_driver = {
591 + .name = "digidac1-audio",
592 + .owner = THIS_MODULE,
593 + .of_match_table = digidac1_soundcard_of_match,
595 + .probe = digidac1_soundcard_probe,
596 + .remove = digidac1_soundcard_remove,
599 +module_platform_driver(digidac1_soundcard_driver);
601 +MODULE_AUTHOR("José M. Tasende <vintage@redrocksaudio.es>");
602 +MODULE_DESCRIPTION("ASoC Driver for RRA DigiDAC1");
603 +MODULE_LICENSE("GPL v2");