v4.19.13 snapshot.
diff --git a/sound/soc/codecs/spdif_receiver.c b/sound/soc/codecs/spdif_receiver.c
new file mode 100644
index 0000000..ac69d49
--- /dev/null
+++ b/sound/soc/codecs/spdif_receiver.c
@@ -0,0 +1,90 @@
+/*
+ * ALSA SoC SPDIF DIR (Digital Interface Reciever) driver
+ *
+ * Based on ALSA SoC SPDIF DIT driver
+ *
+ * This driver is used by controllers which can operate in DIR (SPDI/F) where
+ * no codec is needed. This file provides stub codec that can be used
+ * in these configurations. SPEAr SPDIF IN Audio controller uses this driver.
+ *
+ * Author: Vipin Kumar, <vipin.kumar@st.com>
+ * Copyright: (C) 2012 ST Microelectronics
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <linux/of.h>
+
+static const struct snd_soc_dapm_widget dir_widgets[] = {
+ SND_SOC_DAPM_INPUT("spdif-in"),
+};
+
+static const struct snd_soc_dapm_route dir_routes[] = {
+ { "Capture", NULL, "spdif-in" },
+};
+
+#define STUB_RATES SNDRV_PCM_RATE_8000_192000
+#define STUB_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | \
+ SNDRV_PCM_FMTBIT_S32_LE | \
+ SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
+
+static struct snd_soc_component_driver soc_codec_spdif_dir = {
+ .dapm_widgets = dir_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(dir_widgets),
+ .dapm_routes = dir_routes,
+ .num_dapm_routes = ARRAY_SIZE(dir_routes),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static struct snd_soc_dai_driver dir_stub_dai = {
+ .name = "dir-hifi",
+ .capture = {
+ .stream_name = "Capture",
+ .channels_min = 1,
+ .channels_max = 384,
+ .rates = STUB_RATES,
+ .formats = STUB_FORMATS,
+ },
+};
+
+static int spdif_dir_probe(struct platform_device *pdev)
+{
+ return devm_snd_soc_register_component(&pdev->dev,
+ &soc_codec_spdif_dir,
+ &dir_stub_dai, 1);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id spdif_dir_dt_ids[] = {
+ { .compatible = "linux,spdif-dir", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, spdif_dir_dt_ids);
+#endif
+
+static struct platform_driver spdif_dir_driver = {
+ .probe = spdif_dir_probe,
+ .driver = {
+ .name = "spdif-dir",
+ .of_match_table = of_match_ptr(spdif_dir_dt_ids),
+ },
+};
+
+module_platform_driver(spdif_dir_driver);
+
+MODULE_DESCRIPTION("ASoC SPDIF DIR driver");
+MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
+MODULE_LICENSE("GPL");