bnxt_en: reset PHC frequency in free-running mode

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When using a PHC in shared between multiple hosts, the previous
frequency value may not be reset and could lead to host being unable to
compensate the offset with timecounter adjustments. To avoid such state
reset the hardware frequency of PHC to zero on init. Some refactoring is
needed to make code readable.

Fixes: 85036aee19 ("bnxt_en: Add a non-real time mode to access NIC clock")
Signed-off-by: Vadim Fedorenko <vadfed@meta.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Link: https://lore.kernel.org/r/20230310151356.678059-1-vadfed@meta.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Vadim Fedorenko 2023-03-10 07:13:56 -08:00 • committed by Jakub Kicinski

parent 064d70527a

commit 131db49916

3 changed files with 35 additions and 29 deletions

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6

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

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2

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

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56

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

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