kmudide

Hi All, I have zynqmp based board and we use it as ptp slave. When I run phc_ctl /dev/ptp0 caps, where /dev/ptp0 is macb/gem0 ptp, I get 64000000, which is hardcoded in the following function. static s32 gem_get_ptp_max_adj(void) { return 64000000; } and when I call like this, I get frequency = 6892.211 double f = 0.0; struct timex tx; memset(&tx, 0, sizeof(tx)); if (ClockAdjtime(tx) >= 0) { f = tx.freq / 65.536; } Can anyone tell me how these 6892.211 and 64000000 are derived?