// SPDX-License-Identifier: GPL-2.0+
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//
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// Copyright (C) 2013 Freescale Semiconductor, Inc.
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <sound/soc.h>
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struct imx_spdif_data {
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struct snd_soc_dai_link dai;
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struct snd_soc_card card;
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};
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static int imx_spdif_audio_probe(struct platform_device *pdev)
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{
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struct device_node *spdif_np, *np = pdev->dev.of_node;
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struct imx_spdif_data *data;
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struct snd_soc_dai_link_component *comp;
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int ret = 0;
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spdif_np = of_parse_phandle(np, "spdif-controller", 0);
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if (!spdif_np) {
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dev_err(&pdev->dev, "failed to find spdif-controller\n");
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ret = -EINVAL;
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goto end;
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}
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data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
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comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
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if (!data || !comp) {
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ret = -ENOMEM;
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goto end;
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}
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data->dai.cpus = &comp[0];
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data->dai.codecs = &comp[1];
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data->dai.platforms = &comp[2];
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data->dai.num_cpus = 1;
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data->dai.num_codecs = 1;
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data->dai.num_platforms = 1;
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data->dai.name = "S/PDIF PCM";
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data->dai.stream_name = "S/PDIF PCM";
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data->dai.codecs->dai_name = "snd-soc-dummy-dai";
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data->dai.codecs->name = "snd-soc-dummy";
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data->dai.cpus->of_node = spdif_np;
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data->dai.platforms->of_node = spdif_np;
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data->dai.playback_only = true;
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data->dai.capture_only = true;
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if (of_property_read_bool(np, "spdif-out"))
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data->dai.capture_only = false;
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if (of_property_read_bool(np, "spdif-in"))
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data->dai.playback_only = false;
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if (data->dai.playback_only && data->dai.capture_only) {
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dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
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goto end;
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}
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data->card.dev = &pdev->dev;
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data->card.dai_link = &data->dai;
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data->card.num_links = 1;
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data->card.owner = THIS_MODULE;
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ret = snd_soc_of_parse_card_name(&data->card, "model");
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if (ret)
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goto end;
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ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
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if (ret && ret != -EPROBE_DEFER)
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dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
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end:
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of_node_put(spdif_np);
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return ret;
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}
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static const struct of_device_id imx_spdif_dt_ids[] = {
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{ .compatible = "fsl,imx-audio-spdif", },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
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static struct platform_driver imx_spdif_driver = {
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.driver = {
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.name = "imx-spdif",
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.pm = &snd_soc_pm_ops,
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.of_match_table = imx_spdif_dt_ids,
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},
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.probe = imx_spdif_audio_probe,
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};
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module_platform_driver(imx_spdif_driver);
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MODULE_AUTHOR("Freescale Semiconductor, Inc.");
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MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:imx-spdif");
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