stmmac: intel: add cross time-stamping freq difference adjustment

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Cross time-stamping mechanism used in certain instance of Intel mGbE
may run at different clock frequency in comparison to the clock
frequency used by processor, so we introduce cross T/S frequency
adjustment to ensure TSC calculation is correct when processor got the
cross time-stamps.

Signed-off-by: Wong Vee Khee <vee.khee.wong@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Wong Vee Khee 2021-03-30 10:46:53 +08:00 • committed by David S. Miller

parent 5979415d00

commit 1c137d4777

1 changed files with 27 additions and 0 deletions

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drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c

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