[PATCH 14/14] arm/include/asm/io.h : added macros to read/write big/little endian register
From: Pratyush Anand <hidden>
Date: 2011-08-30 12:26:35
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
There are some peripheral(e.g dwc otg) whose registers can be configured to work in either little or big endian mode. Therefor macros like out_be32, in_be32, out_le32 and in_le32 have been added to support such peripherals. Signed-off-by: Pratyush Anand <redacted> --- arch/arm/include/asm/io.h | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-)
diff --git a/arch/arm/include/asm/io.h b/arch/arm/include/asm/io.h
index 815efa2..32282b4 100644
--- a/arch/arm/include/asm/io.h
+++ b/arch/arm/include/asm/io.h@@ -297,6 +297,14 @@ extern int valid_mmap_phys_addr_range(unsigned long pfn, size_t size); extern int devmem_is_allowed(unsigned long pfn); #endif +/* Big Endian */ +#define out_be32(a, v) writel(__cpu_to_be32(v), a) +#define in_be32(a) __be32_to_cpu(readl(a)) + +/* Little endian */ +#define out_le32(a, v) writel(__cpu_to_le32(v), a) +#define in_le32(a) __le32_to_cpu(readl(a)) + /* * Convert a physical pointer to a virtual kernel pointer for /dev/mem * access
--
1.7.2.2