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102 lines
2.5 KiB
102 lines
2.5 KiB
// 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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