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UPSTREAM: linux/io.h: import generic ioread* / iowrite* accessors from Linux 

Some drivers in Linux (ex. drivers/mtd/nand/denali.c) use
ioread*/iowrite* accessors.  Import them to make drivers more
synced.  I copied code from include/asm-generic/io.h of Linux.

Change-Id: Ifb36301885bb1df36f653f0b9a639b4fc1af6406
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
(cherry picked from commit 6c06f8dc4ab02890ef93b50dac129c2b43cc9ea3)
This commit is contained in:
Masahiro Yamada 2017-08-26 01:02:39 +09:00 committed by Kever Yang
parent ee0f94feab
commit 59814c3b3d
1 changed files with 44 additions and 0 deletions
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44
include/linux/io.h
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@ -9,6 +9,50 @@
#include <linux/types.h>
#include <asm/io.h>
static inline u8 ioread8(const volatile void __iomem *addr)
{
return readb(addr);
}
static inline u16 ioread16(const volatile void __iomem *addr)
{
return readw(addr);
}
static inline u32 ioread32(const volatile void __iomem *addr)
{
return readl(addr);
}
#ifdef CONFIG_64BIT
static inline u64 ioread64(const volatile void __iomem *addr)
{
return readq(addr);
}
#endif /* CONFIG_64BIT */
static inline void iowrite8(u8 value, volatile void __iomem *addr)
{
writeb(value, addr);
}
static inline void iowrite16(u16 value, volatile void __iomem *addr)
{
writew(value, addr);
}
static inline void iowrite32(u32 value, volatile void __iomem *addr)
{
writel(value, addr);
}
#ifdef CONFIG_64BIT
static inline void iowrite64(u64 value, volatile void __iomem *addr)
{
writeq(value, addr);
}
#endif /* CONFIG_64BIT */
#ifndef CONFIG_HAVE_ARCH_IOREMAP
static inline void __iomem *ioremap(resource_size_t offset,
resource_size_t size)