Re: [PATCH net 0/3] net: dsa: lantiq_gswip: SGMII/2500BASE-X and flow-control fixes

[Daniel Golle]

On Mon, Sep 07, 2026 at 03:48:15PM +0200, Jan Havran (Advantech Czech) wrote:
> This series fixes three issues in the lantiq_gswip / mxl-gsw1xx DSA driver
> found while bringing up a MaxLinear GSW145 over SGMII on a Marvell
> Armada 7040 board, with the switch CPU port running 2500BASE-X and the
> user ports at 1000BASE-T.
> 
> Patch 1 reorders the SerDes NCO clock-rate setup ahead of the SGMII shell
> reset. Without it, only the rate the switch was left at by the straps or
> the boot loader links up; the other rate comes up but forwards no traffic.
> 
> Patch 2 adds the missing SPEED_2500 case to gswip_port_set_speed(); without
> it the CPU port was forced to 10 Mbps at 2.5G link-up.
> 
> Patch 3 corrects the GSWIP_MDIO_PHY_FCONTX_EN field value (a typo present
> since the original vrx200 driver).
> 
> Tested on GSW145 hardware only. The register values are backed by the
> public GSW145 data sheet and by the driver's own field encoding; the
> xRX200/xRX300 data sheets are not public.
> 
> Jan Havran (Advantech Czech) (3):
>   net: dsa: mxl-gsw1xx: set SerDes NCO rate before SGMII reset
>   net: dsa: lantiq_gswip: handle SPEED_2500 in gswip_port_set_speed()
>   net: dsa: lantiq_gswip: fix GSWIP_MDIO_PHY_FCONTX_EN value

Thank you for taking care of this on a board which allows you to actually
test it -- on the reference platform I had to develop the driver with the
SerDes interface of the switch is hard-wired to an MxL86111 PHY, hence I
could never test 2500Base-X mode.

Whole series
Reviewed-by: Daniel Golle <daniel@xxxxxxxxxxxxxx>