| Message ID | 20220409184143.1204786-2-horatiu.vultur@microchip.com (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | eb9c0d671e9432901b8a453e7915416f22f7f919 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: lan966x: lan966x fixes | expand |
diff --git a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c index ae782778d6dd..0a1041da4384 100644 --- a/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c +++ b/drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c @@ -29,10 +29,10 @@ enum { static u64 lan966x_ptp_get_nominal_value(void) { - u64 res = 0x304d2df1; - - res <<= 32; - return res; + /* This is the default value that for each system clock, the time of day + * is increased. It has the format 5.59 nanosecond. + */ + return 0x304d4873ecade305; } int lan966x_ptp_hwtstamp_set(struct lan966x_port *port, struct ifreq *ifr)
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: d096459494a887 ("net: lan966x: Add support for ptp clocks") Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com> --- drivers/net/ethernet/microchip/lan966x/lan966x_ptp.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-)