pps_ktime
struct pps_ktime ts_real = { .sec = 0, .nsec = 0, .flags = 0 };
static void pps_add_offset(struct pps_ktime *ts, struct pps_ktime *offset)
struct pps_ktime assert_tu;
struct pps_ktime clear_tu;
static inline void timespec_to_pps_ktime(struct pps_ktime *kt,
struct pps_ktime timeout;
struct pps_ktime assert_tu; /* time of assert event */
struct pps_ktime clear_tu; /* time of clear event */
struct pps_ktime assert_off_tu; /* offset compensation for assert */
struct pps_ktime clear_off_tu; /* offset compensation for clear */