Hello, I am running linuxPTP 1.8 on a 4.14.0-xilinx device.
This device only has software timestamping made available. *root@Megalive:~# ethtool -T eth0Time stamping parameters for eth0:Capabilities: software-transmit (SOF_TIMESTAMPING_TX_SOFTWARE) software-receive (SOF_TIMESTAMPING_RX_SOFTWARE) software-system-clock (SOF_TIMESTAMPING_SOFTWARE)PTP Hardware Clock: noneHardware Transmit Timestamp Modes: noneHardware Receive Filter* I'm able to synchronize this device running as a TimeReceiver, to a TimeSender, at least reportedly. ptp4l will report that the servo S2 state is reached and stable, with a reported offset to the TimeSender in the 1us range (with occasional jumps to double digit offsets). I am ok with this offset jitter, provided it is reported in an accurate way. When it comes to software timestamping, what is the PHC equivalent on the device? Is it a hardware timer? Or is it purely software? ethtool is reporting no PHC, and so I'd assume the PHC is some sort of software timer somewhere in the kernel. Can a virtual PPS be generated from this virtual PHC, in the form of an event potentially? How would you handle this event? Regards, JS
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