Blackfin: new dynamic bfin read/write mmr helpers

These are useful when working with C structs of MMRs as the appropriate
size is selected based on the given argument.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/arch/blackfin/include/asm/def_LPBlackfin.h b/arch/blackfin/include/asm/def_LPBlackfin.h
index f342ff0319df..4e562850021c 100644
--- a/arch/blackfin/include/asm/def_LPBlackfin.h
+++ b/arch/blackfin/include/asm/def_LPBlackfin.h
@@ -50,6 +50,23 @@
 #define bfin_write16(addr, val) _bfin_writeX(addr, val, 16, w)
 #define bfin_write32(addr, val) _bfin_writeX(addr, val, 32,  )
 
+#define bfin_read(addr) \
+({ \
+    sizeof(*(addr)) == 1 ? bfin_read8(addr)  : \
+    sizeof(*(addr)) == 2 ? bfin_read16(addr) : \
+    sizeof(*(addr)) == 4 ? bfin_read32(addr) : \
+    ({ BUG(); 0; }); \
+})
+#define bfin_write(addr, val) \
+({ \
+        switch (sizeof(*(addr))) { \
+        case 1: bfin_write8(addr, val);  break; \
+        case 2: bfin_write16(addr, val); break; \
+        case 4: bfin_write32(addr, val); break; \
+        default: BUG(); \
+        } \
+})
+
 #endif /* __ASSEMBLY__ */
 
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