Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / sound / soc / fsl / imx-spdif.c

diff --git a/kernel/sound/soc/fsl/imx-spdif.c b/kernel/sound/soc/fsl/imx-spdif.c
new file mode 100644 (file)
index 0000000..33da26a
--- /dev/null
+++ b/kernel/sound/soc/fsl/imx-spdif.c
@@ -0,0 +1,102 @@
+/*
+ * 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;
+       }
+
+       platform_set_drvdata(pdev, data);
+
+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",
+               .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");