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authorSebastian Andrzej Siewior <bigeasy@linutronix.de>2012-09-07 14:31:45 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2012-09-10 11:13:16 -0700
commitb53d657d84f530e5d83f34ff1b81ceedad3faa31 (patch)
treef7921ce311aca66d7f42031e3a6e0cd31a808ea9 /include/linux/bcd.h
parent8a424bf40d772fedacc91862ecc86f10541fabb3 (diff)
downloadlinux-linaro-stable-b53d657d84f530e5d83f34ff1b81ceedad3faa31.tar.gz
usb/core: use bin2bcd() for bcdDevice in RH
The kernel's version number is used as decimal in the bcdDevice field of the RH descriptor. For kernel version v3.12 we would see 3.0c in lsusb. I am not sure how important it is to stick with bcd values since this is this way since we started git history and nobody complained (however back then we reported only 2.6). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include/linux/bcd.h')
-rw-r--r--include/linux/bcd.h17
1 files changed, 15 insertions, 2 deletions
diff --git a/include/linux/bcd.h b/include/linux/bcd.h
index 22ea563ba3eb..18fff11fb3ea 100644
--- a/include/linux/bcd.h
+++ b/include/linux/bcd.h
@@ -3,7 +3,20 @@
#include <linux/compiler.h>
-unsigned bcd2bin(unsigned char val) __attribute_const__;
-unsigned char bin2bcd(unsigned val) __attribute_const__;
+#define bcd2bin(x) \
+ (__builtin_constant_p((u8 )(x)) ? \
+ const_bcd2bin(x) : \
+ _bcd2bin(x))
+
+#define bin2bcd(x) \
+ (__builtin_constant_p((u8 )(x)) ? \
+ const_bin2bcd(x) : \
+ _bin2bcd(x))
+
+#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10)
+#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10)
+
+unsigned _bcd2bin(unsigned char val) __attribute_const__;
+unsigned char _bin2bcd(unsigned val) __attribute_const__;
#endif /* _BCD_H */