linux-kernel - Re: [PATCH] net: stmmac: Handle possible fixed-link with need_mdio

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Date:   Fri, 25 Aug 2017 09:45:23 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Corentin Labbe <clabbe.montjoie@...il.com>
Cc:     peppe.cavallaro@...com, alexandre.torgue@...com,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: stmmac: Handle possible fixed-link with
 need_mdio_ids

On 08/25/2017 09:28 AM, Andrew Lunn wrote:
> On Fri, Aug 25, 2017 at 04:42:08PM +0200, Corentin Labbe wrote:
>> In case of fixed link, there are no mdio node.
>> This patch add a test for fixed-link for bypassing MDIO node register.
> 
> The two are not mutually exclusive. E.g.
> vf610-zii-dev.dtsi/vf610-zii-dev-rev-b.dts.  It has a fixed-link on
> the FEC ethernet controller, and an Ethernet switch on the MDIO bus.
> 
> If anybody ever wants to use a switch with the stmmac, this will be
> required.

This is already done in the Lamobo R1 DTS file so it would be nice not
to break this use case:

&gmac {
        pinctrl-names = "default";
        pinctrl-0 = <&gmac_pins_rgmii_a>;
        phy-mode = "rgmii";
        phy-supply = <&reg_gmac_3v3>;
        status = "okay";

        fixed-link {
                speed = <1000>;
                full-duplex;
        };

        mdio {
                compatible = "snps,dwmac-mdio";
                #address-cells = <1>;
                #size-cells = <0>;

                switch: ethernet-switch@1e {
                        compatible = "brcm,bcm53125";
                        reg = <30>;
                        #address-cells = <1>;
                        #size-cells = <0>;


> 
> 	Andrew
> 


-- 
Florian