[Linuxptp-users] Software timestamping on unsupported driver

[Šimon W. <sim...@se...>]

Hello,
I am trying to use ptp4l with software timestamping on my raspberry pi
with a RT5370 wireless adapter. The driver is rt2800usb found in
drivers/net/wireless/ralink/rt2x00 of the raspberry kernel and it
doesn't support software timestamp transmitting. 
I have added skb_tx_timestamp(skb) into the transmit path and a
ethtool_ops struct. Ethtool still reports no software transmitting.
Could I ask for help with this driver or general instructions?

Thanks,
Simon Wernisch