imx-spdif.c 2.5 KB

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  1. // SPDX-License-Identifier: GPL-2.0+
  2. //
  3. // Copyright (C) 2013 Freescale Semiconductor, Inc.
  4. #include <linux/module.h>
  5. #include <linux/of_platform.h>
  6. #include <sound/soc.h>
  7. struct imx_spdif_data {
  8. struct snd_soc_dai_link dai;
  9. struct snd_soc_card card;
  10. };
  11. static int imx_spdif_audio_probe(struct platform_device *pdev)
  12. {
  13. struct device_node *spdif_np, *np = pdev->dev.of_node;
  14. struct imx_spdif_data *data;
  15. struct snd_soc_dai_link_component *comp;
  16. int ret = 0;
  17. spdif_np = of_parse_phandle(np, "spdif-controller", 0);
  18. if (!spdif_np) {
  19. dev_err(&pdev->dev, "failed to find spdif-controller\n");
  20. ret = -EINVAL;
  21. goto end;
  22. }
  23. data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
  24. comp = devm_kzalloc(&pdev->dev, 3 * sizeof(*comp), GFP_KERNEL);
  25. if (!data || !comp) {
  26. ret = -ENOMEM;
  27. goto end;
  28. }
  29. data->dai.cpus = &comp[0];
  30. data->dai.codecs = &comp[1];
  31. data->dai.platforms = &comp[2];
  32. data->dai.num_cpus = 1;
  33. data->dai.num_codecs = 1;
  34. data->dai.num_platforms = 1;
  35. data->dai.name = "S/PDIF PCM";
  36. data->dai.stream_name = "S/PDIF PCM";
  37. data->dai.codecs->dai_name = "snd-soc-dummy-dai";
  38. data->dai.codecs->name = "snd-soc-dummy";
  39. data->dai.cpus->of_node = spdif_np;
  40. data->dai.platforms->of_node = spdif_np;
  41. data->dai.playback_only = true;
  42. data->dai.capture_only = true;
  43. if (of_property_read_bool(np, "spdif-out"))
  44. data->dai.capture_only = false;
  45. if (of_property_read_bool(np, "spdif-in"))
  46. data->dai.playback_only = false;
  47. if (data->dai.playback_only && data->dai.capture_only) {
  48. dev_err(&pdev->dev, "no enabled S/PDIF DAI link\n");
  49. goto end;
  50. }
  51. data->card.dev = &pdev->dev;
  52. data->card.dai_link = &data->dai;
  53. data->card.num_links = 1;
  54. data->card.owner = THIS_MODULE;
  55. ret = snd_soc_of_parse_card_name(&data->card, "model");
  56. if (ret)
  57. goto end;
  58. ret = devm_snd_soc_register_card(&pdev->dev, &data->card);
  59. if (ret && ret != -EPROBE_DEFER)
  60. dev_err(&pdev->dev, "snd_soc_register_card failed: %d\n", ret);
  61. end:
  62. of_node_put(spdif_np);
  63. return ret;
  64. }
  65. static const struct of_device_id imx_spdif_dt_ids[] = {
  66. { .compatible = "fsl,imx-audio-spdif", },
  67. { /* sentinel */ }
  68. };
  69. MODULE_DEVICE_TABLE(of, imx_spdif_dt_ids);
  70. static struct platform_driver imx_spdif_driver = {
  71. .driver = {
  72. .name = "imx-spdif",
  73. .pm = &snd_soc_pm_ops,
  74. .of_match_table = imx_spdif_dt_ids,
  75. },
  76. .probe = imx_spdif_audio_probe,
  77. };
  78. module_platform_driver(imx_spdif_driver);
  79. MODULE_AUTHOR("Freescale Semiconductor, Inc.");
  80. MODULE_DESCRIPTION("Freescale i.MX S/PDIF machine driver");
  81. MODULE_LICENSE("GPL v2");
  82. MODULE_ALIAS("platform:imx-spdif");