net: phy: Add support for 1PPS out and external timestamps

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The perout function is used to generate a 1PPS signal, synchronized
to the PHC.  This is accomplished by a using the hardware oneshot
functionality, which is reset by a timer.

The external timestamp function is set up for a 1PPS input pulse,
and uses a timer to poll for temestamps.

Both functions use the SYNC_OUT/SYNC_IN1 pin, so cannot run
simultaneously.

Co-developed-by: Lasse Johnsen <l@ssejohnsen.me>
Signed-off-by: Lasse Johnsen <l@ssejohnsen.me>
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Jonathan Lemon 2022-06-21 22:04:54 -07:00 • committed by Jakub Kicinski

parent 39db6be781

commit 7bfe91efd5

1 changed files with 226 additions and 0 deletions

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drivers/net/phy/bcm-phy-ptp.c

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