kconfig: Introduce HAVE_ARCH_IOMAP
Introduce a new Kconfig option for architecture codes to control
whether it provides io{read,write}{8,16,32} I/O accessor functions.
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/linux/io.h b/include/linux/io.h
index d1b3efe..9badab4 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -7,6 +7,7 @@
#include <linux/types.h>
#include <asm/io.h>
+#ifndef CONFIG_HAVE_ARCH_IOMAP
static inline u8 ioread8(const volatile void __iomem *addr)
{
return readb(addr);
@@ -21,6 +22,7 @@
{
return readl(addr);
}
+#endif /* !CONFIG_HAVE_ARCH_IOMAP */
#ifdef CONFIG_64BIT
static inline u64 ioread64(const volatile void __iomem *addr)
@@ -29,6 +31,7 @@
}
#endif /* CONFIG_64BIT */
+#ifndef CONFIG_HAVE_ARCH_IOMAP
static inline void iowrite8(u8 value, volatile void __iomem *addr)
{
writeb(value, addr);
@@ -43,6 +46,7 @@
{
writel(value, addr);
}
+#endif /* !CONFIG_HAVE_ARCH_IOMAP */
#ifdef CONFIG_64BIT
static inline void iowrite64(u64 value, volatile void __iomem *addr)
diff --git a/lib/Kconfig b/lib/Kconfig
index ccab426..847e797 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -21,6 +21,12 @@
Enable this option to calculate entries for CRC tables at runtime.
This can be helpful when reducing the size of the build image
+config HAVE_ARCH_IOMAP
+ bool
+ help
+ Enable this option if architecture provides io{read,write}{8,16,32}
+ I/O accessor functions.
+
config HAVE_PRIVATE_LIBGCC
bool