mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 08:58:07 +00:00
8759ef32d9
Provide a helper function to determine optimum numerator denominator value pairs taking into account restricted register size. Useful especially with PLL and other clock configurations. Signed-off-by: Oskar Schirmer <os@emlix.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
19 lines
597 B
C
19 lines
597 B
C
/*
|
|
* rational fractions
|
|
*
|
|
* Copyright (C) 2009 emlix GmbH, Oskar Schirmer <os@emlix.com>
|
|
*
|
|
* helper functions when coping with rational numbers,
|
|
* e.g. when calculating optimum numerator/denominator pairs for
|
|
* pll configuration taking into account restricted register size
|
|
*/
|
|
|
|
#ifndef _LINUX_RATIONAL_H
|
|
#define _LINUX_RATIONAL_H
|
|
|
|
void rational_best_approximation(
|
|
unsigned long given_numerator, unsigned long given_denominator,
|
|
unsigned long max_numerator, unsigned long max_denominator,
|
|
unsigned long *best_numerator, unsigned long *best_denominator);
|
|
|
|
#endif /* _LINUX_RATIONAL_H */
|