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From: Landen Chao <landen.chao@mediatek.com>
To: <andrew@lunn.ch>, <f.fainelli@gmail.com>,
 <vivien.didelot@savoirfairelinux.com>, <matthias.bgg@gmail.com>,
 <robh+dt@kernel.org>, <mark.rutland@arm.com>
CC: <devicetree@vger.kernel.org>, <netdev@vger.kernel.org>,
 <linux-kernel@vger.kernel.org>,
 <linux-mediatek@lists.infradead.org>, <davem@davemloft.net>,
 <sean.wang@mediatek.com>, <opensource@vdorst.com>,
 <frank-w@public-files.de>, Landen Chao <landen.chao@mediatek.com>
Subject: [PATCH net-next 3/6] dt-bindings: net: dsa: add new MT7531 binding
 to support MT7531
Date: Tue, 10 Dec 2019 16:14:39 +0800
Message-ID: <1c382fd916b66bfe3ce8ef18c12f954dbcbddbbc.1575914275.git.landen.chao@mediatek.com>
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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    | 77 ++++++++++++++++++-
 1 file changed, 74 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/dsa/mt7530.txt b/Documentation/devicetree/bindings/net/dsa/mt7530.txt
index c5ed5d25f642..dc226a4e402a 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 +312,70 @@ Example 3: MT7621: Port 5 is connected to external PHY: Port 5 -> external PHY.
                };
        };
 };
+
+Example 4:
+
+&eth {
+       gmac0: mac@0 {
+               compatible = "mediatek,eth-mac";
+               reg = <0>;
+               phy-mode = "2500base-x";
+
+               fixed-link {
+                       speed = <1000>;
+                       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";
+
+                                       fixed-link {
+                                               speed = <1000>;
+                                               full-duplex;
+                                               pause;
+                                       };
+                               };
+                       };
+               };
+       };