sound/soc/codecs/amlogic/pdm_dummy.c

// SPDX-License-Identifier: GPL-2.0
/*
 * ALSA SoC pdm_dummy codec driver
 *
 * Copyright (C) 2019 Amlogic,inc
 *
 */

#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/of.h>
#include <sound/soc.h>

#define DRV_NAME "pdm_dummy"

#define DUMMY_RATES    (SNDRV_PCM_RATE_96000 |\
					SNDRV_PCM_RATE_64000 |\
					SNDRV_PCM_RATE_48000 |\
					SNDRV_PCM_RATE_32000 |\
					SNDRV_PCM_RATE_16000 |\
					SNDRV_PCM_RATE_8000)

#define DUMMY_FORMATS    (SNDRV_PCM_FMTBIT_S16_LE |\
					SNDRV_PCM_FMTBIT_S24_LE |\
					SNDRV_PCM_FMTBIT_S32_LE)

struct snd_soc_dai_driver pdm_dummy_dai = {
	.name    = DRV_NAME,
	.capture = {
		.stream_name  = "PDM Capture",
		.channels_min = 1,
		.channels_max = 16,
		.rates        = DUMMY_RATES,
		.formats      = DUMMY_FORMATS,
	},
};

static const struct snd_soc_component_driver soc_component_dev_pdm_dummy = {
	.name  = DRV_NAME,
};

static const struct of_device_id pdm_dummy_codec_device_id[] = {
	{ .compatible = "amlogic, pdm_dummy_codec" },
	{ },
};
MODULE_DEVICE_TABLE(of, pdm_dummy_codec_device_id);

static int pdm_dummy_platform_probe(struct platform_device *pdev)
{
	pr_info("%s\n", __func__);

	return devm_snd_soc_register_component(&pdev->dev,
			&soc_component_dev_pdm_dummy,
			&pdm_dummy_dai, 1);
}

static int pdm_dummy_platform_remove(struct platform_device *pdev)
{
	return 0;
}

static struct platform_driver pdm_dummy_platform_driver = {
	.driver = {
		.name           = DRV_NAME,
		.owner          = THIS_MODULE,
		.of_match_table = of_match_ptr(pdm_dummy_codec_device_id),
	},
	.probe  = pdm_dummy_platform_probe,
	.remove = pdm_dummy_platform_remove,
};

module_platform_driver(pdm_dummy_platform_driver);

MODULE_AUTHOR("AMLogic, Inc.");
MODULE_DESCRIPTION("ASoC pdm_dummy codec driver");
MODULE_LICENSE("GPL");