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net: lan966x: Update lan966x_ptp_get_nominal_value
The clk_per_cfg register represents the value added to the system clock
for each clock cycle. The issue is that the default value is wrong,
meaning that in case the DUT was a grandmaster then everone in the
network was too slow. In case there was a grandmaster, then there is no
issue because the DUT will configure clk_per_cfg register based on the
master frequency.
Fixes: d096459494
("net: lan966x: Add support for ptp clocks")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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1 changed files with 4 additions and 4 deletions
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@ -29,10 +29,10 @@ enum {
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static u64 lan966x_ptp_get_nominal_value(void)
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{
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u64 res = 0x304d2df1;
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res <<= 32;
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return res;
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/* This is the default value that for each system clock, the time of day
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* is increased. It has the format 5.59 nanosecond.
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*/
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return 0x304d4873ecade305;
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}
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int lan966x_ptp_hwtstamp_set(struct lan966x_port *port, struct ifreq *ifr)
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