GLTSYN_EVNT_H_IDX_MAX
for (chan = 0; chan < GLTSYN_EVNT_H_IDX_MAX; chan++) {
info->n_ext_ts = GLTSYN_EVNT_H_IDX_MAX;
struct ptp_extts_request extts_rqs[GLTSYN_EVNT_H_IDX_MAX];