Re: [PATCH net v2 3/9] net: axienet: reset core on initialization prior to MDIO access

[Andrew Lunn <andrew@lunn.ch>]

On Wed, Jan 12, 2022 at 11:36:54AM -0600, Robert Hancock wrote:
> In some cases where the Xilinx Ethernet core was used in 1000Base-X or
> SGMII modes, which use the internal PCS/PMA PHY, and the MGT
> transceiver clock source for the PCS was not running at the time the
> FPGA logic was loaded, the core would come up in a state where the
> PCS could not be found on the MDIO bus. To fix this, the Ethernet core
> (including the PCS) should be reset after enabling the clocks, prior to
> attempting to access the PCS using of_mdio_find_device.
> 
> Fixes: 1a02556086fc (net: axienet: Properly handle PCS/PMA PHY for 1000BaseX mode)
> Signed-off-by: Robert Hancock <robert.hancock@calian.com>

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

    Andrew