igc: Enable internal i225 PPS

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The i225 device can produce one interrupt on the full second, much
like i210 - from where this patch is inspired.

This patch sets up the full second interruption on the i225 and when
receiving it, it sends a PPS event to PTP (Precision Time Protocol)
kernel subsystem.

The PTP subsystem exposes the PPS events via ioctl and sysfs, and one
can use the `testptp` tool (tools/testing/selftests/ptp) to check that
the events are being generated.

Signed-off-by: Ederson de Souza <ederson.desouza@intel.com>
Tested-by: Dvora Fuxbrumer <dvorax.fuxbrumer@linux.intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

...

This commit is contained in:

Ederson de Souza 2021-02-18 17:31:03 -08:00 • committed by Tony Nguyen

parent 1d3cb90cb0

commit 64433e5bf4

3 changed files with 37 additions and 1 deletions

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2

drivers/net/ethernet/intel/igc/igc.h

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8

drivers/net/ethernet/intel/igc/igc_main.c

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28

drivers/net/ethernet/intel/igc/igc_ptp.c

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