include/linux/rational.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * rational fractions
   4  *
   5  * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <oskar@scara.com>
   6  *
   7  * helper functions when coping with rational numbers,
   8  * e.g. when calculating optimum numerator/denominator pairs for
   9  * pll configuration taking into account restricted register size
  10  */
  11
  12 #ifndef _LINUX_RATIONAL_H
  13 #define _LINUX_RATIONAL_H
  14
  15 void rational_best_approximation(
  16         unsigned long given_numerator, unsigned long given_denominator,
  17         unsigned long max_numerator, unsigned long max_denominator,
  18         unsigned long *best_numerator, unsigned long *best_denominator);
  19
  20 #endif /* _LINUX_RATIONAL_H */