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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BCD_H3#define _BCD_H4 5#include <linux/compiler.h>6 7#define bcd2bin(x) \8 (__builtin_constant_p((u8 )(x)) ? \9 const_bcd2bin(x) : \10 _bcd2bin(x))11 12#define bin2bcd(x) \13 (__builtin_constant_p((u8 )(x)) ? \14 const_bin2bcd(x) : \15 _bin2bcd(x))16 17#define bcd_is_valid(x) \18 const_bcd_is_valid(x)19 20#define const_bcd2bin(x) (((x) & 0x0f) + ((x) >> 4) * 10)21#define const_bin2bcd(x) ((((x) / 10) << 4) + (x) % 10)22#define const_bcd_is_valid(x) (((x) & 0x0f) < 10 && ((x) >> 4) < 10)23 24unsigned _bcd2bin(unsigned char val) __attribute_const__;25unsigned char _bin2bcd(unsigned val) __attribute_const__;26 27#endif /* _BCD_H */28