timecompare.c File Reference

#include <linux/timecompare.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/math64.h>
#include <linux/kernel.h>

Go to the source code of this file.

Macros
#define	TIMECOMPARE_SKEW_RESOLUTION   (((s64)1)<<30)
#define	TIMECOMPARE_NEW_SKEW_PER_16   12

Functions
ktime_t	timecompare_transform (struct timecompare *sync, u64 source_tstamp)
	EXPORT_SYMBOL_GPL (timecompare_transform)
int	timecompare_offset (struct timecompare *sync, s64 *offset, u64 *source_tstamp)
	EXPORT_SYMBOL_GPL (timecompare_offset)
void	__timecompare_update (struct timecompare *sync, u64 source_tstamp)
	EXPORT_SYMBOL_GPL (__timecompare_update)

Macro Definition Documentation

#define TIMECOMPARE_NEW_SKEW_PER_16   12

#define TIMECOMPARE_SKEW_RESOLUTION   (((s64)1)<<30)

Definition at line 32 of file timecompare.c.

Function Documentation

void __timecompare_update	(	struct timecompare *	sync,
		u64	source_tstamp
	)

Definition at line 138 of file timecompare.c.

EXPORT_SYMBOL_GPL

(

timecompare_transform

)

EXPORT_SYMBOL_GPL

(

timecompare_offset

)

EXPORT_SYMBOL_GPL

(

__timecompare_update

)

int timecompare_offset	(	struct timecompare *	sync,
		s64 *	offset,
		u64 *	source_tstamp
	)

timecompare_offset - measure current (target time - source time) offset : context for time sync : average offset during sample period returned here : average source time during sample period returned here

Returns number of samples used. Might be zero (= no result) in the unlikely case that target time was monotonically decreasing for all samples (= broken).

Definition at line 47 of file timecompare.c.

ktime_t timecompare_transform	(	struct timecompare *	sync,
		u64	source_tstamp
	)

timecompare_transform - transform source time stamp into target time base : context for time sync : the result of timecounter_read() or timecounter_cyc2time()

Definition at line 34 of file timecompare.c.