[PATCH net-next v3 2/3] net: phy: micrel: add option to keep the preamble before sfd for KSZ9131

[Andrew Lunn]

On Tue, Jan 20, 2026 at 09:30:03PM +0100, Stefan Eichenberger wrote:
> From: Stefan Eichenberger <stefan.eichenberger at toradex.com>
> 
> If the PHY_F_KEEP_PREAMBLE_BEFORE_SFD flag is set in the
> phy_device::dev_flags field, the preamble will be kept before the start
> frame delimiter (SFD) on the KSZ9131 PHY. This flag is not officially
> documented by Micrel. However, information provided by NXP and Micrel
> indicates that this flag ensures the PHY sends the full preamble instead
> of removing it. The full discussion can be found on the NXP forum:
> https://community.nxp.com/t5/i-MX-Processors/iMX8MP-eqos-not-working-for-10base-t/m-p/2151032
> 
> Signed-off-by: Stefan Eichenberger <stefan.eichenberger at toradex.com>

Reviewed-by: Andrew Lunn <andrew at lunn.ch>

    Andrew