iommu: provide helper function to configure an IOMMU for an of master
The generic IOMMU device-tree bindings can be used to add arbitrary OF
masters to an IOMMU with a compliant binding.
This patch introduces of_iommu_configure, which does exactly that.
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index 5762cdc..d03abbb 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -1,6 +1,7 @@
#ifndef __OF_IOMMU_H
#define __OF_IOMMU_H
+#include <linux/device.h>
#include <linux/iommu.h>
#include <linux/of.h>
@@ -11,6 +12,7 @@
size_t *size);
extern void of_iommu_init(void);
+extern struct iommu_ops *of_iommu_configure(struct device *dev);
#else
@@ -22,6 +24,10 @@
}
static inline void of_iommu_init(void) { }
+static inline struct iommu_ops *of_iommu_configure(struct device *dev)
+{
+ return NULL;
+}
#endif /* CONFIG_OF_IOMMU */