From 4e0ee78f2af96676c9dca898c13250f62c513058 Mon Sep 17 00:00:00 2001 From: Hiroshi Doyu Date: Mon, 25 Jun 2012 14:23:54 +0300 Subject: iommu: Add DMA window parser, of_get_dma_window() This code was based on: "arch/microblaze/kernel/prom_parse.c" "arch/powerpc/kernel/prom_parse.c" Can replace "of_parse_dma_window()" in the above. This supports different formats flexibly. "prefix" can be configured if any. "busno" and "index" are optionally specified. Set NULL and 0 if not used. Signed-off-by: Hiroshi DOYU Acked-by: Stephen Warren Signed-off-by: Joerg Roedel --- include/linux/of_iommu.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 include/linux/of_iommu.h (limited to 'include/linux/of_iommu.h') diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h new file mode 100644 index 000000000000..51a560f34bca --- /dev/null +++ b/include/linux/of_iommu.h @@ -0,0 +1,21 @@ +#ifndef __OF_IOMMU_H +#define __OF_IOMMU_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); + +#else + +static inline int of_get_dma_window(struct device_node *dn, const char *prefix, + int index, unsigned long *busno, dma_addr_t *addr, + size_t *size) +{ + return -EINVAL; +} + +#endif /* CONFIG_OF_IOMMU */ + +#endif /* __OF_IOMMU_H */ -- cgit v1.2.1