ioremap API is here to be compatible with Linux drivers, to maintain compatibility we need to ensure we are using the same way to determine virtual address for IO devices from physical address.
map_physmem is U-Boot's standard way for doing the trick, we should follow that. For architectures VA == PA it has no impact, for MIPS it has it's own ioremap implementation in asm/io.h anyway.
Signed-off-by: Jiaxun Yang jiaxun.yang@flygoat.com --- include/linux/io.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/linux/io.h b/include/linux/io.h index 79847886be95..ada6525a1c6a 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -59,11 +59,12 @@ static inline void iowrite64(u64 value, volatile void __iomem *addr) static inline void __iomem *ioremap(resource_size_t offset, resource_size_t size) { - return (void __iomem *)(unsigned long)offset; + return (void __iomem *)map_physmem(offset, size, MAP_NOCACHE); }
static inline void iounmap(void __iomem *addr) { + return unmap_physmem(addr, MAP_NOCACHE); } #endif