in sysfs.c [18:29]
static ssize_t assert_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct pps_device *pps = dev_get_drvdata(dev);
if (!(pps->info.mode & PPS_CAPTUREASSERT))
return 0;
return sprintf(buf, "%lld.%09d#%d\n",
(long long) pps->assert_tu.sec, pps->assert_tu.nsec,
pps->assert_sequence);
}