[PATCH 2/6] net: phy: maxio: parse and enable PHY clock from generic DT binding
Andrew Lunn
andrew at lunn.ch
Mon Aug 3 19:43:50 PDT 2026
On Mon, Aug 03, 2026 at 12:14:48PM +0200, Andre Przywara wrote:
> The generic PHY DT binding features a clocks property, which describes
> the clock input to the PHY. Typically this is a crystal oscillator, so
> it works without software interaction. But some boards want to save some
> pennies on that part, and let a clock fanout pin from the SoC provide this
> clock signal. In this case the PHY probe routine needs to enable this
> clock explicitly.
>
> Look for a "clocks" property inside the PHY node and enable that clock,
> if one is provided.
>
> This allows boards with a SoC-driven PHY clock to use the PHY. Please
> note that without the clock enabled, the PHY will not be detected on the
> MDIO bus, so the PHY-ID needs to be explicitly named in the PHY
> compatible string:
> compatible = "ethernet-phy-id7b74.4411";
>
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
Reviewed-by: Andrew Lunn <andrew at lunn.ch>
Andrew
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