bnxt_en: Add driver support to use Real Time Counter for PTP

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Add support for RTC mode if it is supported by firmware.  In RTC
mode, the PHC is set to the 64-bit clock.  Because the legacy interface
is 48-bit, the driver still has to keep track of the upper 16 bits and
handle the rollover.

Cc: Richard Cochran <richardcochran@gmail.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Signed-off-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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This commit is contained in:

Pavan Chebbi 2022-01-25 23:40:11 -05:00 • committed by David S. Miller

parent 740c342e39

commit 24ac1ecd52

4 changed files with 79 additions and 6 deletions

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7

drivers/net/ethernet/broadcom/bnxt/bnxt.c

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1

drivers/net/ethernet/broadcom/bnxt/bnxt.h

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73

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.c

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4

drivers/net/ethernet/broadcom/bnxt/bnxt_ptp.h

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