LXR linux/include/linux/rational.h

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