--- zzzz-none-000/linux-3.10.107/include/linux/of_iommu.h	2017-06-27 09:49:32.000000000 +0000
+++ scorpion-7490-727/linux-3.10.107/include/linux/of_iommu.h	2021-02-04 17:41:59.000000000 +0000
@@ -1,12 +1,20 @@
 #ifndef __OF_IOMMU_H
 #define __OF_IOMMU_H
 
+#include <linux/device.h>
+#include <linux/iommu.h>
+#include <linux/of.h>
+
 #ifdef CONFIG_OF_IOMMU
 
 extern int of_get_dma_window(struct device_node *dn, const char *prefix,
 			     int index, unsigned long *busno, dma_addr_t *addr,
 			     size_t *size);
 
+extern void of_iommu_init(void);
+extern const struct iommu_ops *of_iommu_configure(struct device *dev,
+					struct device_node *master_np);
+
 #else
 
 static inline int of_get_dma_window(struct device_node *dn, const char *prefix,
@@ -16,6 +24,23 @@
 	return -EINVAL;
 }
 
+static inline void of_iommu_init(void) { }
+static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
+					 struct device_node *master_np)
+{
+	return NULL;
+}
+
 #endif	/* CONFIG_OF_IOMMU */
 
+void of_iommu_set_ops(struct device_node *np, const struct iommu_ops *ops);
+const struct iommu_ops *of_iommu_get_ops(struct device_node *np);
+
+extern struct of_device_id __iommu_of_table;
+
+typedef int (*of_iommu_init_fn)(struct device_node *);
+
+#define IOMMU_OF_DECLARE(name, compat, fn) \
+	_OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
+
 #endif /* __OF_IOMMU_H */