1 // SPDX-License-Identifier: GPL-2.0+
3 // Copyright (C) 2013 Freescale Semiconductor, Inc.
5 #include <linux/module.h>
6 #include <linux/of_platform.h>
9 struct imx_spdif_data {
10 struct snd_soc_dai_link dai;
11 struct snd_soc_card card;
14 static int imx_spdif_audio_probe(struct platform_device *pdev)
16 struct device_node *spdif_np, *np = pdev->dev.of_node;
17 struct imx_spdif_data *data;
18 struct snd_soc_dai_link_component *comp;
21 spdif_np = of_parse_phandle(np, "spdif-controller", 0);
23 dev_err(&pdev->dev, "failed to find spdif-controller\n");
28 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
29 comp = devm_kzalloc(&pdev->dev, sizeof(*comp), GFP_KERNEL);
37 * platform is using soc-generic-dmaengine-pcm
40 data->dai.platforms = comp;
41 data->dai.codecs = &snd_soc_dummy_dlc;
43 data->dai.num_cpus = 1;
44 data->dai.num_codecs = 1;
45 data->dai.num_platforms = 1;
47 data->dai.name = "S/PDIF PCM";
48 data->dai.stream_name = "S/PDIF PCM";
49 data->dai.cpus->of_node = spdif_np;
50 data->dai.playback_only = true;
51 data->dai.capture_only = true;
53 if (of_property_read_bool(np, "spdif-out"))
54 data->dai.capture_only = false;
56 if (of_property_read_bool(np, "spdif-in"))
57 data->dai.playback_only = false;
59 if (data->dai.playback_only && data->dai.capture_only) {
60 dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
64 data->card.dev = &pdev->dev;
65 data->card.dai_link = &data->dai;
66 data->card.num_links = 1;
67 data->card.owner = THIS_MODULE;
69 ret = snd_soc_of_parse_card_name(&data->card, "model");
73 ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
75 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
78 of_node_put(spdif_np);
83 static const struct of_device_id imx_spdif_dt_ids[] = {
84 { .compatible = "fsl,imx-audio-spdif", },
87 MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
89 static struct platform_driver imx_spdif_driver = {
92 .pm = &snd_soc_pm_ops,
93 .of_match_table = imx_spdif_dt_ids,
95 .probe = imx_spdif_audio_probe,
98 module_platform_driver(imx_spdif_driver);
100 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
101 MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
102 MODULE_LICENSE("GPL v2");
103 MODULE_ALIAS("platform:imx-spdif");