Add support for functions clrbits_X(), setbits_X() and clrsetbits_X()
on MIPS.
Signed-off-by: Daniel Schwierzeck <daniel.schwierz...@gmail.com>
---
@Wills, after rebasing my own SoC code to this series and trying to use the new
accessors
I've hit the same problems with endianess in a driver. My drivers have to
support Big and
Little Endian, thus I have to use __raw_readX/__raw_writeX. So I also added
variants
of the new accessors without swapping and a similar behaviour as
__raw_readX/__raw_writeX.
This should address your concers too.
Changes in v4:
- added clrbits_X(), setbits_X() and clrsetbits_X() variants without endianess
swapping
Changes in v3: None
Changes in v2: None
arch/mips/include/asm/io.h | 55 ++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 55 insertions(+)
diff --git a/arch/mips/include/asm/io.h b/arch/mips/include/asm/io.h
index eb06afa..b8ac5a5 100644
--- a/arch/mips/include/asm/io.h
+++ b/arch/mips/include/asm/io.h
@@ -541,4 +541,59 @@ static inline void unmap_physmem(void *vaddr, unsigned
long flags)
{
}
+#define __BUILD_CLRBITS(bwlq, sfx, end, type) \
+ \
+static inline void clrbits_##sfx(volatile void __iomem *mem, type clr) \
+{ \
+ type __val = __raw_read##bwlq(mem); \
+ __val = end##_to_cpu(__val); \
+ __val &= ~clr; \
+ __val = cpu_to_##end(__val); \
+ __raw_write##bwlq(__val, mem); \
+}
+
+#define __BUILD_SETBITS(bwlq, sfx, end, type) \
+ \
+static inline void setbits_##sfx(volatile void __iomem *mem, type set) \
+{ \
+ type __val = __raw_read##bwlq(mem); \
+ __val = end##_to_cpu(__val); \
+ __val |= set; \
+ __val = cpu_to_##end(__val); \
+ __raw_write##bwlq(__val, mem); \
+}
+
+#define __BUILD_CLRSETBITS(bwlq, sfx, end, type) \
+ \
+static inline void clrsetbits_##sfx(volatile void __iomem *mem,
\
+ type clr, type set) \
+{ \
+ type __val = __raw_read##bwlq(mem); \
+ __val = end##_to_cpu(__val); \
+ __val &= ~clr; \
+ __val |= set; \
+ __val = cpu_to_##end(__val); \
+ __raw_write##bwlq(__val, mem); \
+}
+
+#define BUILD_CLRSETBITS(bwlq, sfx, end, type) \
+ \
+__BUILD_CLRBITS(bwlq, sfx, end, type) \
+__BUILD_SETBITS(bwlq, sfx, end, type) \
+__BUILD_CLRSETBITS(bwlq, sfx, end, type)
+
+#define __to_cpu(v) (v)
+#define cpu_to__(v) (v)
+
+BUILD_CLRSETBITS(b, 8, _, u8)
+BUILD_CLRSETBITS(w, le16, le16, u16)
+BUILD_CLRSETBITS(w, be16, be16, u16)
+BUILD_CLRSETBITS(w, 16, _, u16)
+BUILD_CLRSETBITS(l, le32, le32, u32)
+BUILD_CLRSETBITS(l, be32, be32, u32)
+BUILD_CLRSETBITS(l, 32, _, u32)
+BUILD_CLRSETBITS(q, le64, le64, u64)
+BUILD_CLRSETBITS(q, be64, be64, u64)
+BUILD_CLRSETBITS(q, 64, _, u64)
+
#endif /* _ASM_IO_H */
--
2.5.0
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