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| author | Wei Fang <wei.fang@nxp.com> | 2025-09-05 11:07:09 +0800 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-09-09 19:28:52 -0700 |
| commit | e096a7cc0be126d9376e549a10d71cf16b1a1c1c (patch) | |
| tree | e34c70e0eb4b0b45e1f9e46c34447daa6fabe08b /scripts/generate_rust_target.rs | |
| parent | cf71bdf6863f0aebd00aeccce313b8833ee9c7f4 (diff) | |
ptp: add debugfs interfaces to loop back the periodic output signal
For some PTP devices, they have the capability to loop back the periodic
output signal for debugging, such as the ptp_qoriq device. So add the
generic interfaces to set the periodic output signal loopback, rather
than each vendor having a different implementation.
Show how many channels support the periodic output signal loopback:
$ cat /sys/kernel/debug/ptp<N>/n_perout_loopback
Enable the loopback of the periodic output signal of channel X:
$ echo <X> 1 > /sys/kernel/debug/ptp<N>/perout_loopback
Disable the loopback of the periodic output signal of channel X:
$ echo <X> 0 > /sys/kernel/debug/ptp<N>/perout_loopback
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Wei Fang <wei.fang@nxp.com>
Link: https://patch.msgid.link/20250905030711.1509648-2-wei.fang@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'scripts/generate_rust_target.rs')
0 files changed, 0 insertions, 0 deletions