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pps: unify timestamp gathering

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Add a helper function to gather timestamps.  This way clients don't have
to duplicate it.

Signed-off-by: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexander Gordeev
2011-01-12 17:00:50 -08:00
committed by Linus Torvalds
parent 3003d55b59
commit 6f4229b511
6 changed files with 45 additions and 31 deletions
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20
include/linux/pps_kernel.h
View File

@@ -43,6 +43,10 @@ struct pps_source_info {
struct device *dev;
};
struct pps_event_time {
struct timespec ts_real;
};
/* The main struct */
struct pps_device {
struct pps_source_info info; /* PSS source info */
@@ -88,6 +92,20 @@ extern int pps_register_source(struct pps_source_info *info,
extern void pps_unregister_source(int source);
extern int pps_register_cdev(struct pps_device *pps);
extern void pps_unregister_cdev(struct pps_device *pps);
extern void pps_event(int source, struct pps_ktime *ts, int event, void *data);
extern void pps_event(int source, struct pps_event_time *ts, int event,
void *data);
static inline void timespec_to_pps_ktime(struct pps_ktime *kt,
struct timespec ts)
{
kt->sec = ts.tv_sec;
kt->nsec = ts.tv_nsec;
}
static inline void pps_get_ts(struct pps_event_time *ts)
{
getnstimeofday(&ts->ts_real);
}
#endif /* LINUX_PPS_KERNEL_H */

5
include/linux/serial_core.h
View File

@@ -212,6 +212,7 @@
#include <linux/tty.h>
#include <linux/mutex.h>
#include <linux/sysrq.h>
#include <linux/pps_kernel.h>
struct uart_port;
struct serial_struct;
@@ -528,10 +529,10 @@ uart_handle_dcd_change(struct uart_port *uport, unsigned int status)
struct uart_state *state = uport->state;
struct tty_port *port = &state->port;
struct tty_ldisc *ld = tty_ldisc_ref(port->tty);
struct timespec ts;
struct pps_event_time ts;
if (ld && ld->ops->dcd_change)
getnstimeofday(&ts);
pps_get_ts(&ts);
uport->icount.dcd++;
#ifdef CONFIG_HARD_PPS

5
include/linux/tty_ldisc.h
View File

@@ -101,7 +101,7 @@
* any pending driver I/O is completed.
*
* void (*dcd_change)(struct tty_struct *tty, unsigned int status,
* struct timespec *ts)
* struct pps_event_time *ts)
*
* Tells the discipline that the DCD pin has changed its status and
* the relative timestamp. Pointer ts can be NULL.
@@ -109,6 +109,7 @@
#include <linux/fs.h>
#include <linux/wait.h>
#include <linux/pps_kernel.h>
struct tty_ldisc_ops {
int magic;
@@ -143,7 +144,7 @@ struct tty_ldisc_ops {
char *fp, int count);
void (*write_wakeup)(struct tty_struct *);
void (*dcd_change)(struct tty_struct *, unsigned int,
struct timespec *);
struct pps_event_time *);
struct module *owner;