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    SubjectRe: [PATCH net-next v2 4/7] dt-bindings: net: dsa: add new MT7531 binding to support MT7531
    On Tue, Aug 18, 2020 at 03:14:09PM +0800, Landen Chao wrote:
    > Add devicetree binding to support the compatible mt7531 switch as used
    > in the MediaTek MT7531 switch.
    >
    > Signed-off-by: Sean Wang <sean.wang@mediatek.com>
    > Signed-off-by: Landen Chao <landen.chao@mediatek.com>
    > ---
    > .../devicetree/bindings/net/dsa/mt7530.txt | 71 ++++++++++++++++++-
    > 1 file changed, 68 insertions(+), 3 deletions(-)
    >
    > diff --git a/Documentation/devicetree/bindings/net/dsa/mt7530.txt b/Documentation/devicetree/bindings/net/dsa/mt7530.txt
    > index c5ed5d25f642..50eaf40fb612 100644
    > --- a/Documentation/devicetree/bindings/net/dsa/mt7530.txt
    > +++ b/Documentation/devicetree/bindings/net/dsa/mt7530.txt
    > @@ -5,6 +5,7 @@ Required properties:
    >
    > - compatible: may be compatible = "mediatek,mt7530"
    > or compatible = "mediatek,mt7621"
    > + or compatible = "mediatek,mt7531"
    > - #address-cells: Must be 1.
    > - #size-cells: Must be 0.
    > - mediatek,mcm: Boolean; if defined, indicates that either MT7530 is the part
    > @@ -32,10 +33,13 @@ Required properties for the child nodes within ports container:
    >
    > - reg: Port address described must be 6 for CPU port and from 0 to 5 for
    > user ports.
    > -- phy-mode: String, must be either "trgmii" or "rgmii" for port labeled
    > - "cpu".
    > +- phy-mode: String, the follow value would be acceptable for port labeled "cpu"
    > + If compatible mediatek,mt7530 or mediatek,mt7621 is set,
    > + must be either "trgmii" or "rgmii"
    > + If compatible mediatek,mt7531 is set,
    > + must be either "sgmii", "1000base-x" or "2500base-x"
    >
    > -Port 5 of the switch is muxed between:
    > +Port 5 of mt7530 and mt7621 switch is muxed between:
    > 1. GMAC5: GMAC5 can interface with another external MAC or PHY.
    > 2. PHY of port 0 or port 4: PHY interfaces with an external MAC like 2nd GMAC
    > of the SOC. Used in many setups where port 0/4 becomes the WAN port.
    > @@ -308,3 +312,64 @@ Example 3: MT7621: Port 5 is connected to external PHY: Port 5 -> external PHY.
    > };
    > };
    > };
    > +
    > +Example 4: MT7531BE port6 -- up-clocked 2.5Gbps SGMII -- MT7622 CPU 1st GMAC

    Does this really need another example?

    > +
    > +&eth {
    > + gmac0: mac@0 {
    > + compatible = "mediatek,eth-mac";
    > + reg = <0>;
    > + phy-mode = "2500base-x";
    > +
    > + fixed-link {
    > + speed = <2500>;
    > + full-duplex;
    > + pause;
    > + };
    > + };
    > +
    > + &mdio0 {
    > + switch@0 {
    > + compatible = "mediatek,mt7531";
    > + reg = <0>;
    > + reset-gpios = <&pio 54 0>;
    > +
    > + ports {
    > + #address-cells = <1>;
    > + #size-cells = <0>;
    > + reg = <0>;
    > +
    > + port@0 {
    > + reg = <0>;
    > + label = "lan0";
    > + };
    > +
    > + port@1 {
    > + reg = <1>;
    > + label = "lan1";
    > + };
    > +
    > + port@2 {
    > + reg = <2>;
    > + label = "lan2";
    > + };
    > +
    > + port@3 {
    > + reg = <3>;
    > + label = "lan3";
    > + };
    > +
    > + port@4 {
    > + reg = <4>;
    > + label = "wan";
    > + };
    > +
    > + port@6 {
    > + reg = <6>;
    > + label = "cpu";
    > + ethernet = <&gmac0>;
    > + phy-mode = "2500base-x";
    > + };
    > + };
    > + };
    > + };
    > --
    > 2.17.1

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