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 */ |
21 | |