| Message ID | 20230711205732.364954-4-ahalaney@redhat.com (mailing list archive) |
|---|---|
| State | RFC |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: stmmac: Increase clk_ptp_ref rate | expand |
On Tue, Jul 11, 2023 at 03:35:32PM -0500, Andrew Halaney wrote: > Using the max frequency allows for the best PTP timestamping resolution, > so let's default to that. > > Signed-off-by: Andrew Halaney <ahalaney@redhat.com> Reviewed-by: Simon Horman <simon.horman@corigine.com>
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index 231152ee5a32..c9a27a71a3f4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -602,6 +602,11 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac) plat->clk_ptp_ref = NULL; dev_info(&pdev->dev, "PTP uses main clock\n"); } else { + /* Get the best resolution possible */ + rc = clk_set_rate(plat->clk_ptp_ref, ULONG_MAX); + if (rc) + dev_err(&pdev->dev, + "Failed to set clk_ptp_ref rate: %d\n", rc); plat->clk_ptp_rate = clk_get_rate(plat->clk_ptp_ref); dev_dbg(&pdev->dev, "PTP rate %d\n", plat->clk_ptp_rate); }
Using the max frequency allows for the best PTP timestamping resolution, so let's default to that. Signed-off-by: Andrew Halaney <ahalaney@redhat.com> --- drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 5 +++++ 1 file changed, 5 insertions(+)