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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. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
/*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _LINUX_IO_H
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#define _LINUX_IO_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <asm/io.h>
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static inline u8 ioread8(const volatile void __iomem *addr)
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{
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return readb(addr);
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}
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static inline u16 ioread16(const volatile void __iomem *addr)
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{
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return readw(addr);
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}
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static inline u32 ioread32(const volatile void __iomem *addr)
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{
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return readl(addr);
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}
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#ifdef CONFIG_64BIT
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static inline u64 ioread64(const volatile void __iomem *addr)
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{
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return readq(addr);
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}
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#endif /* CONFIG_64BIT */
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static inline void iowrite8(u8 value, volatile void __iomem *addr)
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{
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writeb(value, addr);
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}
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static inline void iowrite16(u16 value, volatile void __iomem *addr)
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{
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writew(value, addr);
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}
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static inline void iowrite32(u32 value, volatile void __iomem *addr)
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{
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writel(value, addr);
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}
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#ifdef CONFIG_64BIT
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static inline void iowrite64(u64 value, volatile void __iomem *addr)
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{
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writeq(value, addr);
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}
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#endif /* CONFIG_64BIT */
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#ifndef CONFIG_HAVE_ARCH_IOREMAP
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static inline void __iomem *ioremap(resource_size_t offset,
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resource_size_t size)
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{
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return (void __iomem *)(unsigned long)offset;
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}
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static inline void iounmap(void __iomem *addr)
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{
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}
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#define devm_ioremap(dev, offset, size) ioremap(offset, size)
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#endif
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#endif /* _LINUX_IO_H */
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