1 files changed, 53 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-pcm-dma.c b/sound/soc/fsl/imx-pcm-dma.c
new file mode 100644
index 000000000..04a9bc749
--- /dev/null
+++ b/sound/soc/fsl/imx-pcm-dma.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * imx-pcm-dma-mx2.c  --  ALSA Soc Audio Layer
+ *
+ * Copyright 2009 Sascha Hauer <s.hauer@pengutronix.de>
+ *
+ * This code is based on code copyrighted by Freescale,
+ * Liam Girdwood, Javier Martin and probably others.
+ */
+#include <linux/platform_device.h>
+#include <linux/dmaengine.h>
+#include <linux/types.h>
+#include <linux/module.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/dmaengine_pcm.h>
+
+#include "imx-pcm.h"
+
+static bool filter(struct dma_chan *chan, void *param)
+{
+	if (!imx_dma_is_general_purpose(chan))
+		return false;
+
+	chan->private = param;
+
+	return true;
+}
+
+static const struct snd_dmaengine_pcm_config imx_dmaengine_pcm_config = {
+	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+	.compat_filter_fn = filter,
+};
+
+int imx_pcm_dma_init(struct platform_device *pdev, size_t size)
+{
+	struct snd_dmaengine_pcm_config *config;
+
+	config = devm_kzalloc(&pdev->dev,
+			sizeof(struct snd_dmaengine_pcm_config), GFP_KERNEL);
+	if (!config)
+		return -ENOMEM;
+	*config = imx_dmaengine_pcm_config;
+
+	return devm_snd_dmaengine_pcm_register(&pdev->dev,
+		config,
+		SND_DMAENGINE_PCM_FLAG_COMPAT);
+}
+EXPORT_SYMBOL_GPL(imx_pcm_dma_init);
+
+MODULE_LICENSE("GPL");