On Fri, Mar 24, 2017 at 06:44:30PM +0100, Šimon Wernisch wrote:
> 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.
Wireless PTP is not going to work very well. I recommend using NTP
instead.
> I have added skb_tx_timestamp(skb) into the transmit path and a
> ethtool_ops struct. Ethtool still reports no software transmitting.
It is not enough just to add the ethtool structure...
> +static const struct ethtool_ops rt2x00_ethtool_ops = {
> + .get_ts_info = ethtool_op_get_ts_info,
> + .get_link = ethtool_op_get_link
> +};
You also must use it in the driver's net_device instance, for example:
ndev->ethtool_ops = &rt2x00_ethtool_ops;
HTH,
Richard
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