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pps: default echo function 

A default echo function has been provided so it is no longer an error when
you specify PPS_ECHOASSERT or PPS_ECHOCLEAR without an explicit echo
function.  This allows some code re-use and also makes it easier to write
client drivers since the default echo function does not normally need to
change.

Signed-off-by: James Nuss <jamesnuss@nanometrics.ca>
Reviewed-by: Ben Gardiner <bengardiner@nanometrics.ca>
Acked-by: Rodolfo Giometti <giometti@linux.it>
Cc: Ricardo Martins <rasm@fe.up.pt>
Cc: Alexander Gordeev <lasaine@lvk.cs.msu.su>
Cc: Igor Plyatov <plyatov@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
James Nuss 2011-11-02 13:39:34 -07:00 committed by Linus Torvalds
parent 842fa69f3e
commit 437c534186
3 changed files with 13 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
drivers/pps/clients/pps-ktimer.c
View File

@ -51,17 +51,6 @@ static void pps_ktimer_event(unsigned long ptr)
mod_timer(&ktimer, jiffies + HZ);
}
/*
* The echo function
*/
static void pps_ktimer_echo(struct pps_device *pps, int event, void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
* The PPS info struct
*/
@ -72,7 +61,6 @@ static struct pps_source_info pps_ktimer_info = {
.mode = PPS_CAPTUREASSERT | PPS_OFFSETASSERT |
PPS_ECHOASSERT |
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.echo = pps_ktimer_echo,
.owner = THIS_MODULE,
};

9
drivers/pps/clients/pps_parport.c
View File

@ -133,14 +133,6 @@ static void parport_irq(void *handle)
return;
}
/* the PPS echo function */
static void pps_echo(struct pps_device *pps, int event, void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
static void parport_attach(struct parport *port)
{
struct pps_client_pp *device;
@ -151,7 +143,6 @@ static void parport_attach(struct parport *port)
PPS_OFFSETASSERT | PPS_OFFSETCLEAR | \
PPS_ECHOASSERT | PPS_ECHOCLEAR | \
PPS_CANWAIT | PPS_TSFMT_TSPEC,
.echo = pps_echo,
.owner = THIS_MODULE,
.dev = NULL
};

20
drivers/pps/kapi.c
View File

@ -52,6 +52,14 @@ static void pps_add_offset(struct pps_ktime *ts, struct pps_ktime *offset)
ts->sec += offset->sec;
}
static void pps_echo_client_default(struct pps_device *pps, int event,
void *data)
{
dev_info(pps->dev, "echo %s %s\n",
event & PPS_CAPTUREASSERT ? "assert" : "",
event & PPS_CAPTURECLEAR ? "clear" : "");
}
/*
* Exported functions
*/
@ -80,13 +88,6 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
err = -EINVAL;
goto pps_register_source_exit;
}
if ((info->mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) != 0 &&
info->echo == NULL) {
pr_err("%s: echo function is not defined\n",
info->name);
err = -EINVAL;
goto pps_register_source_exit;
}
if ((info->mode & (PPS_TSFMT_TSPEC | PPS_TSFMT_NTPFP)) == 0) {
pr_err("%s: unspecified time format\n",
info->name);
@ -108,6 +109,11 @@ struct pps_device *pps_register_source(struct pps_source_info *info,
pps->params.mode = default_params;
pps->info = *info;
/* check for default echo function */
if ((pps->info.mode & (PPS_ECHOASSERT | PPS_ECHOCLEAR)) &&
pps->info.echo == NULL)
pps->info.echo = pps_echo_client_default;
init_waitqueue_head(&pps->queue);
spin_lock_init(&pps->lock);