On Fri, Dec 10, 2021 at 01:05:04PM +0200, alexandru.tachici@analog.com wrote:

From: Alexandru Tachici <redacted>

The 802.3gc specification defines the 10-BaseT1L link
mode for ethernet trafic on twisted wire pair.

PMA status register can be used to detect if the phy supports
2.4 V TX level and PCS control register can be used to
enable/disable PCS level loopback.

Signed-off-by: Alexandru Tachici <redacted>

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

    Andrew