1 #ifndef __OF_IOMMU_H 2 #define __OF_IOMMU_H 3 4 #ifdef CONFIG_OF_IOMMU 5 6 extern int of_get_dma_window(struct device_node *dn, const char *prefix, 7 int index, unsigned long *busno, dma_addr_t *addr, 8 size_t *size); 9 10 #else 11 12 static inline int of_get_dma_window(struct device_node *dn, const char *prefix, 13 int index, unsigned long *busno, dma_addr_t *addr, 14 size_t *size) 15 { 16 return -EINVAL; 17 } 18 19 #endif /* CONFIG_OF_IOMMU */ 20 21 #endif /* __OF_IOMMU_H */ 22