diff options
Diffstat (limited to 'drivers/pps/kapi.c')
| -rw-r--r-- | drivers/pps/kapi.c | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/drivers/pps/kapi.c b/drivers/pps/kapi.c index a4e8eb9fece..cdad4d95b20 100644 --- a/drivers/pps/kapi.c +++ b/drivers/pps/kapi.c @@ -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); @@ -101,13 +102,18 @@ struct pps_device *pps_register_source(struct pps_source_info *info, goto pps_register_source_exit; } - /* These initializations must be done before calling idr_get_new() + /* These initializations must be done before calling idr_alloc() * in order to avoid reces into pps_event(). */ pps->params.api_version = PPS_API_VERS; 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); |