[PATCH 14/14] arm/include/asm/io.h : added macros to read/write big/little endian register

[Pratyush Anand]

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 <pratyush.anand at st.com>
---
 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