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authorMasahiro Yamada <yamada.masahiro@socionext.com>2016-06-28 10:48:42 +0900
committerTom Rini <trini@konsulko.com>2016-07-14 18:22:26 -0400
commit9a387128e341debb6d7e32df8e0f72669a3a079b (patch)
tree855db996d332cc0edcbcd4adcd65dd163fa585e3 /include/linux
parentc74b8fcdd7193cfcaf8b3c6dab9a59c6feb8a49a (diff)
linux/io.h: add generic ioremap()/iounmap() defines
For most of architectures in U-Boot, virtual address is straight mapped to physical address. So, it makes sense to have generic defines of ioremap and friends in <linux/io.h>. All of them are just empty and will disappear at compile time, but they will be helpful to implement drivers which are counterparts of Linux ones. I notice MIPS already has its own implementation, so I added a Kconfig symbol CONFIG_HAVE_ARCH_IOREMAP which MIPS (and maybe Sandbox as well) can select. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/io.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/io.h b/include/linux/io.h
index 1b36a2299e1..a104b7e69f7 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -5,6 +5,22 @@
#ifndef _LINUX_IO_H
#define _LINUX_IO_H
+#include <linux/compiler.h>
+#include <linux/types.h>
#include <asm/io.h>
+#ifndef CONFIG_HAVE_ARCH_IOREMAP
+static inline void __iomem *ioremap(resource_size_t offset,
+ resource_size_t size)
+{
+ return (void __iomem *)(unsigned long)offset;
+}
+
+static inline void iounmap(void __iomem *addr)
+{
+}
+
+#define devm_ioremap(dev, offset, size) ioremap(offset, size)
+#endif
+
#endif /* _LINUX_IO_H */