mirror of https://gitee.com/openkylin/linux.git
102 lines
2.5 KiB
C
102 lines
2.5 KiB
C
/*
|
|
* Copyright (C) 2013 Freescale Semiconductor, Inc.
|
|
*
|
|
* The code contained herein is licensed under the GNU General Public
|
|
* License. You may obtain a copy of the GNU General Public License
|
|
* Version 2 or later at the following locations:
|
|
*
|
|
* http://www.opensource.org/licenses/gpl-license.html
|
|
* http://www.gnu.org/copyleft/gpl.html
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/of_platform.h>
|
|
#include <sound/soc.h>
|
|
|
|
struct imx_spdif_data {
|
|
struct snd_soc_dai_link dai;
|
|
struct snd_soc_card card;
|
|
};
|
|
|
|
static int imx_spdif_audio_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *spdif_np, *np = pdev->dev.of_node;
|
|
struct imx_spdif_data *data;
|
|
int ret = 0;
|
|
|
|
spdif_np = of_parse_phandle(np, "spdif-controller", 0);
|
|
if (!spdif_np) {
|
|
dev_err(&pdev->dev, "failed to find spdif-controller\n");
|
|
ret = -EINVAL;
|
|
goto end;
|
|
}
|
|
|
|
data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
|
|
if (!data) {
|
|
ret = -ENOMEM;
|
|
goto end;
|
|
}
|
|
|
|
data->dai.name = "S/PDIF PCM";
|
|
data->dai.stream_name = "S/PDIF PCM";
|
|
data->dai.codec_dai_name = "snd-soc-dummy-dai";
|
|
data->dai.codec_name = "snd-soc-dummy";
|
|
data->dai.cpu_of_node = spdif_np;
|
|
data->dai.platform_of_node = spdif_np;
|
|
data->dai.playback_only = true;
|
|
data->dai.capture_only = true;
|
|
|
|
if (of_property_read_bool(np, "spdif-out"))
|
|
data->dai.capture_only = false;
|
|
|
|
if (of_property_read_bool(np, "spdif-in"))
|
|
data->dai.playback_only = false;
|
|
|
|
if (data->dai.playback_only && data->dai.capture_only) {
|
|
dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
|
|
goto end;
|
|
}
|
|
|
|
data->card.dev = &pdev->dev;
|
|
data->card.dai_link = &data->dai;
|
|
data->card.num_links = 1;
|
|
data->card.owner = THIS_MODULE;
|
|
|
|
ret = snd_soc_of_parse_card_name(&data->card, "model");
|
|
if (ret)
|
|
goto end;
|
|
|
|
ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
|
|
goto end;
|
|
}
|
|
|
|
end:
|
|
of_node_put(spdif_np);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id imx_spdif_dt_ids[] = {
|
|
{ .compatible = "fsl,imx-audio-spdif", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
|
|
|
|
static struct platform_driver imx_spdif_driver = {
|
|
.driver = {
|
|
.name = "imx-spdif",
|
|
.pm = &snd_soc_pm_ops,
|
|
.of_match_table = imx_spdif_dt_ids,
|
|
},
|
|
.probe = imx_spdif_audio_probe,
|
|
};
|
|
|
|
module_platform_driver(imx_spdif_driver);
|
|
|
|
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
|
|
MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:imx-spdif");
|