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| author | Ahmad Fatoum <a.fatoum@pengutronix.de> | 2020-11-18 00:38:26 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-18 21:51:17 +0300 |
| commit | d04a53b1c48766665806eb75b73137734abdaa95 (patch) | |
| tree | c048412a65dfae0b0e9d4f626ecd6af30e038686 /include/linux/ptp_clock_kernel.h | |
| parent | ed30aef3c864f99111e16d4ea5cf29488d99a278 (diff) | |
| download | linux-d04a53b1c48766665806eb75b73137734abdaa95.tar.xz | |
ptp: document struct ptp_clock_request members
It's arguable most people interested in configuring a PPS signal
want it as external output, not as kernel input. PTP_CLK_REQ_PPS
is for input though. Add documentation to nudge readers into
the correct direction.
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Link: https://lore.kernel.org/r/20201117213826.18235-1-a.fatoum@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'include/linux/ptp_clock_kernel.h')
| -rw-r--r-- | include/linux/ptp_clock_kernel.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/ptp_clock_kernel.h b/include/linux/ptp_clock_kernel.h index d3e8ba5c7125..0d47fd33b228 100644 --- a/include/linux/ptp_clock_kernel.h +++ b/include/linux/ptp_clock_kernel.h @@ -12,6 +12,19 @@ #include <linux/pps_kernel.h> #include <linux/ptp_clock.h> +/** + * struct ptp_clock_request - request PTP clock event + * + * @type: The type of the request. + * EXTTS: Configure external trigger timestamping + * PEROUT: Configure periodic output signal (e.g. PPS) + * PPS: trigger internal PPS event for input + * into kernel PPS subsystem + * @extts: describes configuration for external trigger timestamping. + * This is only valid when event == PTP_CLK_REQ_EXTTS. + * @perout: describes configuration for periodic output. + * This is only valid when event == PTP_CLK_REQ_PEROUT. + */ struct ptp_clock_request { enum { |