On 4/8/2021 11:38 AM, Martin Blumenstingl wrote:
> There are a few more bits in the GSWIP_MII_CFG register for which we
> did rely on the boot-loader (or the hardware defaults) to set them up
> properly.
>
> For some external RMII PHYs we need to select the GSWIP_MII_CFG_RMII_CLK
> bit and also we should un-set it for non-RMII PHYs. The
> GSWIP_MII_CFG_RMII_CLK bit is ignored for other PHY connection modes.
>
> The GSWIP IP also supports in-band auto-negotiation for RGMII PHYs when
> the GSWIP_MII_CFG_RGMII_IBS bit is set. Clear this bit always as there's
> no known hardware which uses this (so it is not tested yet).
>
> Clear the xMII isolation bit when set at initialization time if it was
> previously set by the bootloader. Not doing so could lead to no traffic
> (neither RX nor TX) on a port with this bit set.
>
> While here, also add the GSWIP_MII_CFG_RESET bit. We don't need to
> manage it because this bit is self-clearning when set. We still add it
> here to get a better overview of the GSWIP_MII_CFG register.
>
> Fixes: 14fceff4771e51 ("net: dsa: Add Lantiq / Intel DSA driver for vrx200")
> Cc: stable@xxxxxxxxxxxxxxx
> Suggested-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
> Acked-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx>
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
--
Florian
