1 files changed, 45 insertions, 0 deletions

diff --git a/include/linux/of_dma.h b/include/linux/of_dma.h
new file mode 100644
index 000000000000..337823dc6b90
--- /dev/null
+++ b/include/linux/of_dma.h
@@ -0,0 +1,45 @@
+/*
+ * OF helpers for DMA request / controller
+ *
+ * Based on of_gpio.h
+ *
+ * Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * 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.
+ */
+
+#ifndef __LINUX_OF_DMA_H
+#define __LINUX_OF_DMA_H
+
+#include <linux/of.h>
+#include <linux/dmaengine.h>
+
+struct device_node;
+
+struct of_dma {
+        struct list_head        of_dma_controllers;
+        struct device_node      *of_node;
+        int                     of_dma_nbcells;
+        struct dma_chan         *(*of_dma_xlate)
+                                (struct of_phandle_args *, struct of_dma *);
+        void                    *of_dma_data;
+};
+
+struct of_dma_filter_info {
+        dma_cap_mask_t  dma_cap;
+        dma_filter_fn   filter_fn;
+};
+
+extern int of_dma_controller_register(struct device_node *np,
+                struct dma_chan *(*of_dma_xlate)
+                (struct of_phandle_args *, struct of_dma *),
+                void *data);
+extern void of_dma_controller_free(struct device_node *np);
+extern struct dma_chan *of_dma_request_slave_channel(struct device_node *np,
+                                                     char *name);
+extern struct dma_chan *of_dma_simple_xlate(struct of_phandle_args *dma_spec,
+                struct of_dma *ofdma);
+
+#endif /* __LINUX_OF_DMA_H */