include/linux/bcd.h

   1 /* Permission is hereby granted to copy, modify and redistribute this code
   2  * in terms of the GNU Library General Public License, Version 2 or later,
   3  * at your option.
   4  */
   5
   6 /* macros to translate to/from binary and binary-coded decimal (frequently
   7  * found in RTC chips).
   8  */
   9
  10 #ifndef _BCD_H
  11 #define _BCD_H
  12
  13 #include <linux/compiler.h>
  14
  15 unsigned bcd2bin(unsigned char val) __attribute_const__;
  16 unsigned char bin2bcd(unsigned val) __attribute_const__;
  17
  18 #define BCD2BIN(val)    bcd2bin(val)
  19 #define BIN2BCD(val)    bin2bcd(val)
  20
  21 /* backwards compat */
  22 #define BCD_TO_BIN(val) ((val)=BCD2BIN(val))
  23 #define BIN_TO_BCD(val) ((val)=BIN2BCD(val))
  24
  25 #endif /* _BCD_H */