1*b2441318SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0 */ 28759ef32SOskar Schirmer /* 38759ef32SOskar Schirmer * rational fractions 48759ef32SOskar Schirmer * 56684b572SOskar Schirmer * Copyright (C) 2009 emlix GmbH, Oskar Schirmer <oskar@scara.com> 68759ef32SOskar Schirmer * 78759ef32SOskar Schirmer * helper functions when coping with rational numbers, 88759ef32SOskar Schirmer * e.g. when calculating optimum numerator/denominator pairs for 98759ef32SOskar Schirmer * pll configuration taking into account restricted register size 108759ef32SOskar Schirmer */ 118759ef32SOskar Schirmer 128759ef32SOskar Schirmer #ifndef _LINUX_RATIONAL_H 138759ef32SOskar Schirmer #define _LINUX_RATIONAL_H 148759ef32SOskar Schirmer 158759ef32SOskar Schirmer void rational_best_approximation( 168759ef32SOskar Schirmer unsigned long given_numerator, unsigned long given_denominator, 178759ef32SOskar Schirmer unsigned long max_numerator, unsigned long max_denominator, 188759ef32SOskar Schirmer unsigned long *best_numerator, unsigned long *best_denominator); 198759ef32SOskar Schirmer 208759ef32SOskar Schirmer #endif /* _LINUX_RATIONAL_H */ 21