include/linux/rational.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * rational fractions
0004  *
0005  * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <oskar@scara.com>
0006  *
0007  * helper functions when coping with rational numbers,
0008  * e.g. when calculating optimum numerator/denominator pairs for
0009  * pll configuration taking into account restricted register size
0010  */
0011
0012 #ifndef _LINUX_RATIONAL_H
0013 #define _LINUX_RATIONAL_H
0014
0015 void rational_best_approximation(
0016     unsigned long given_numerator, unsigned long given_denominator,
0017     unsigned long max_numerator, unsigned long max_denominator,
0018     unsigned long *best_numerator, unsigned long *best_denominator);
0019
0020 #endif /* _LINUX_RATIONAL_H */