From 2895c4b7d65e1a65f7d8804126f91ee91e8e2481 Mon Sep 17 00:00:00 2001 From: Bin Meng Date: Mon, 15 Oct 2018 02:21:15 -0700 Subject: [PATCH] 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 Reviewed-by: Simon Glass --- include/linux/io.h | 4 ++++ lib/Kconfig | 6 ++++++ 2 files changed, 10 insertions(+) diff --git a/include/linux/io.h b/include/linux/io.h index d1b3efed9d..9badab49b0 100644 --- a/include/linux/io.h +++ b/include/linux/io.h @@ -7,6 +7,7 @@ #include #include +#ifndef CONFIG_HAVE_ARCH_IOMAP static inline u8 ioread8(const volatile void __iomem *addr) { return readb(addr); @@ -21,6 +22,7 @@ static inline u32 ioread32(const volatile void __iomem *addr) { return readl(addr); } +#endif /* !CONFIG_HAVE_ARCH_IOMAP */ #ifdef CONFIG_64BIT static inline u64 ioread64(const volatile void __iomem *addr) @@ -29,6 +31,7 @@ static inline u64 ioread64(const volatile void __iomem *addr) } #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 @@ static inline void iowrite32(u32 value, volatile void __iomem *addr) { 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 ccab426e12..847e797a3a 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -21,6 +21,12 @@ config DYNAMIC_CRC_TABLE 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 -- 2.25.1