On Wed, Jul 11, 2018 at 07:45:11PM +0200, Linus Walleij wrote:
> By a simple extension of of_phy_get_and_connect() drivers
> that have a fixed link on e.g. RGMII can support also
> fixed links, so in addition to:
>
> ethernet-port {
> phy-mode = "rgmii";
> phy-handle = <&foo>;
> };
>
> This setup with a fixed-link node and no phy-handle will
> now also work just fine:
>
> ethernet-port {
> phy-mode = "rgmii";
> fixed-link {
> speed = <1000>;
> full-duplex;
> pause;
> };
> };
>
> This is very helpful for connecting random ethernet ports
> to e.g. DSA switches that typically reside on fixed links.
>
> The phy-mode is still there as the fixes link in this case
> is still an RGMII link.
>
> Tested on the Cortina Gemini driver with the Vitesse DSA
> router chip on a fixed 1Gbit link.
>
> Suggested-by: Andrew Lunn <[email protected]>
> Signed-off-by: Linus Walleij <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
What probably make sense as a followup is add a
of_phy_disconnect_and_put(). When the module is unloaded, you leak a
fixed link, because of_phy_deregister_fixed_link() is not being
called. You also hold a reference to np which does not appear to be
released.
Andrew
