1 files changed, 102 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-spdif.c b/sound/soc/fsl/imx-spdif.c
new file mode 100644
index 000000000..6c4dadf60
--- /dev/null
+++ b/sound/soc/fsl/imx-spdif.c
@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: GPL-2.0+
+//
+// Copyright (C) 2013 Freescale Semiconductor, Inc.
+
+#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;
+	struct snd_soc_dai_link_component *comp;
+	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);
+	comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
+	if (!data || !comp) {
+		ret = -ENOMEM;
+		goto end;
+	}
+
+	data->dai.cpus		= &comp[0];
+	data->dai.codecs	= &comp[1];
+	data->dai.platforms	= &comp[2];
+
+	data->dai.num_cpus	= 1;
+	data->dai.num_codecs	= 1;
+	data->dai.num_platforms	= 1;
+
+	data->dai.name = "S/PDIF PCM";
+	data->dai.stream_name = "S/PDIF PCM";
+	data->dai.codecs->dai_name = "snd-soc-dummy-dai";
+	data->dai.codecs->name = "snd-soc-dummy";
+	data->dai.cpus->of_node = spdif_np;
+	data->dai.platforms->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 && ret != -EPROBE_DEFER)
+		dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
+
+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");