LXR linux/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
  15void 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 */
  21