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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /sound/soc/fsl/imx-spdif.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/fsl/imx-spdif.c')
-rw-r--r-- | sound/soc/fsl/imx-spdif.c | 102 |
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..4446fba75 --- /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) + dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n"); + +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"); |