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| author | Vincent Mailhol <mailhol.vincent@wanadoo.fr> | 2022-07-27 19:16:35 +0900 |
|---|---|---|
| committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2022-07-28 11:44:30 +0200 |
| commit | 90f942c5a6d775bad1be33ba214755314105da4a (patch) | |
| tree | 42b5bcd668f47922a150f3e88f727f598db71386 /Documentation/trace | |
| parent | 7fb48d25b5ce3bc488dbb019bf1736248181de9a (diff) | |
can: dev: add generic function can_eth_ioctl_hwts()
Tools based on libpcap (such as tcpdump) expect the SIOCSHWTSTAMP
ioctl call to be supported. This is also specified in the kernel doc
[1]. The purpose of this ioctl is to toggle the hardware timestamps.
Currently, CAN devices which support hardware timestamping have those
always activated. can_eth_ioctl_hwts() is a dumb function that will
always succeed when requested to set tx_type to HWTSTAMP_TX_ON or
rx_filter to HWTSTAMP_FILTER_ALL.
[1] Kernel doc: Timestamping, section 3.1 "Hardware Timestamping
Implementation: Device Drivers"
Link: https://docs.kernel.org/networking/timestamping.html#hardware-timestamping-implementation-device-drivers
Signed-off-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Link: https://lore.kernel.org/all/20220727101641.198847-9-mailhol.vincent@wanadoo.fr
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'Documentation/trace')
0 files changed, 0 insertions, 0 deletions