On Thu, Aug 22, 2024 at 01:59:39PM +0200, Oleksij Rempel wrote:

Introduce statistics support for the DP83TG720 PHY driver, enabling
detailed monitoring and reporting of link quality and packet-related
metrics.

To avoid double reading of certain registers, the implementation caches
all relevant register values in a single operation. This approach
ensures accurate and consistent data retrieval, particularly for
registers that clear upon reading or require special handling.

Some of the statistics, such as link training times, do not increment
and therefore require special handling during the extraction process.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>

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

    Andrew