sound/soc/codecs/gtm601.c

Source file repositories/reference/linux-study-clean/sound/soc/codecs/gtm601.c

File Facts

System
Linux kernel
Corpus path
sound/soc/codecs/gtm601.c
Extension
.c
Size
2755 bytes
Lines
110
Domain
Driver Families
Bucket
sound/soc
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0-only
/*
 * This is a simple driver for the GTM601 Voice PCM interface
 *
 * Copyright (C) 2015 Goldelico GmbH
 *
 * Author: Marek Belisko <marek@goldelico.com>
 *
 * Based on wm8727.c driver
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/of.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/soc.h>

static const struct snd_soc_dapm_widget gtm601_dapm_widgets[] = {
	SND_SOC_DAPM_OUTPUT("AOUT"),
	SND_SOC_DAPM_INPUT("AIN"),
};

static const struct snd_soc_dapm_route gtm601_dapm_routes[] = {
	{ "AOUT", NULL, "Playback" },
	{ "Capture", NULL, "AIN" },
};

static struct snd_soc_dai_driver gtm601_dai = {
	.name = "gtm601",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
		},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 1,
		.rates = SNDRV_PCM_RATE_8000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
};

static struct snd_soc_dai_driver bm818_dai = {
	.name = "bm818",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 2,
		.channels_max = 2,
		.rates = SNDRV_PCM_RATE_48000,
		.formats = SNDRV_PCM_FMTBIT_S16_LE,
	},
};

static const struct snd_soc_component_driver soc_component_dev_gtm601 = {
	.dapm_widgets		= gtm601_dapm_widgets,
	.num_dapm_widgets	= ARRAY_SIZE(gtm601_dapm_widgets),
	.dapm_routes		= gtm601_dapm_routes,
	.num_dapm_routes	= ARRAY_SIZE(gtm601_dapm_routes),
	.idle_bias_on		= 1,
	.use_pmdown_time	= 1,
	.endianness		= 1,
};

static int gtm601_platform_probe(struct platform_device *pdev)
{
	const struct snd_soc_dai_driver *dai_driver;

	dai_driver = of_device_get_match_data(&pdev->dev);

	return devm_snd_soc_register_component(&pdev->dev,
			&soc_component_dev_gtm601,
			(struct snd_soc_dai_driver *)dai_driver, 1);
}

static const struct of_device_id gtm601_codec_of_match[] __maybe_unused = {
	{ .compatible = "option,gtm601", .data = (void *)&gtm601_dai },

Annotation

Implementation Notes