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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/dsa/airoha,an8855.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Airoha AN8855 Gigabit switch
+
+maintainers:
+ - Christian Marangi <ansuelsmth@gmail.com>
+
+description: >
+ Airoha AN8855 is a 5-port Gigabit Switch.
+
+ The switch node requires an additional mdio node to describe each internal
+ PHY relative offset as the PHY address for the switch match the one for
+ the PHY ports. On top of internal PHY address, the switch base PHY address
+ is added.
+
+ Also the switch base PHY address can be configured and changed after the
+ first initialization. On reset, the switch PHY address is ALWAYS 1.
+
+properties:
+ compatible:
+ const: airoha,an8855
+
+ reg:
+ maxItems: 1
+
+ reset-gpios:
+ description:
+ GPIO to be used to reset the whole device
+ maxItems: 1
+
+ airoha,ext-surge:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description:
+ Calibrate the internal PHY with the calibration values stored in EFUSE
+ for the r50Ohm values.
+
+ '#nvmem-cell-cells':
+ const: 0
+
+ nvmem-layout:
+ $ref: /schemas/nvmem/layouts/nvmem-layout.yaml
+ description:
+ NVMEM Layout for exposed EFUSE. (for example to propagate calibration
+ value for r50Ohm for internal PHYs)
+
+ mdio:
+ $ref: /schemas/net/mdio.yaml#
+ unevaluatedProperties: false
+ description:
+ Define the absolute address of the internal PHY for each port.
+
+$ref: dsa.yaml#
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/gpio/gpio.h>
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ switch@1 {
+ compatible = "airoha,an8855";
+ reg = <1>;
+ reset-gpios = <&pio 39 0>;
+
+ airoha,ext-surge;
+
+ #nvmem-cell-cells = <0>;
+
+ nvmem-layout {
+ compatible = "fixed-layout";
+ #address-cells = <1>;
+ #size-cells = <1>;
+
+ shift_sel_port0_tx_a: shift-sel-port0-tx-a@c {
+ reg = <0xc 0x4>;
+ };
+
+ shift_sel_port0_tx_b: shift-sel-port0-tx-b@10 {
+ reg = <0x10 0x4>;
+ };
+
+ shift_sel_port0_tx_c: shift-sel-port0-tx-c@14 {
+ reg = <0x14 0x4>;
+ };
+
+ shift_sel_port0_tx_d: shift-sel-port0-tx-d@18 {
+ reg = <0x18 0x4>;
+ };
+
+ shift_sel_port1_tx_a: shift-sel-port1-tx-a@1c {
+ reg = <0x1c 0x4>;
+ };
+
+ shift_sel_port1_tx_b: shift-sel-port1-tx-b@20 {
+ reg = <0x20 0x4>;
+ };
+
+ shift_sel_port1_tx_c: shift-sel-port1-tx-c@24 {
+ reg = <0x24 0x4>;
+ };
+
+ shift_sel_port1_tx_d: shift-sel-port1-tx-d@28 {
+ reg = <0x28 0x4>;
+ };
+
+ shift_sel_port2_tx_a: shift-sel-port2-tx-a@2c {
+ reg = <0x2c 0x4>;
+ };
+
+ shift_sel_port2_tx_b: shift-sel-port2-tx-b@30 {
+ reg = <0x30 0x4>;
+ };
+
+ shift_sel_port2_tx_c: shift-sel-port2-tx-c@34 {
+ reg = <0x34 0x4>;
+ };
+
+ shift_sel_port2_tx_d: shift-sel-port2-tx-d@38 {
+ reg = <0x38 0x4>;
+ };
+
+ shift_sel_port3_tx_a: shift-sel-port3-tx-a@4c {
+ reg = <0x4c 0x4>;
+ };
+
+ shift_sel_port3_tx_b: shift-sel-port3-tx-b@50 {
+ reg = <0x50 0x4>;
+ };
+
+ shift_sel_port3_tx_c: shift-sel-port3-tx-c@54 {
+ reg = <0x54 0x4>;
+ };
+
+ shift_sel_port3_tx_d: shift-sel-port3-tx-d@58 {
+ reg = <0x58 0x4>;
+ };
+ };
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ reg = <0>;
+ label = "lan1";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy1>;
+ };
+
+ port@1 {
+ reg = <1>;
+ label = "lan2";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy2>;
+ };
+
+ port@2 {
+ reg = <2>;
+ label = "lan3";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy3>;
+ };
+
+ port@3 {
+ reg = <3>;
+ label = "lan4";
+ phy-mode = "internal";
+ phy-handle = <&internal_phy4>;
+ };
+
+ port@5 {
+ reg = <5>;
+ label = "cpu";
+ ethernet = <&gmac0>;
+ phy-mode = "2500base-x";
+
+ fixed-link {
+ speed = <2500>;
+ full-duplex;
+ pause;
+ };
+ };
+ };
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ internal_phy1: phy@1 {
+ reg = <1>;
+
+ nvmem-cells = <&shift_sel_port0_tx_a>,
+ <&shift_sel_port0_tx_b>,
+ <&shift_sel_port0_tx_c>,
+ <&shift_sel_port0_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+
+ internal_phy2: phy@2 {
+ reg = <2>;
+
+ nvmem-cells = <&shift_sel_port1_tx_a>,
+ <&shift_sel_port1_tx_b>,
+ <&shift_sel_port1_tx_c>,
+ <&shift_sel_port1_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+
+ internal_phy3: phy@3 {
+ reg = <3>;
+
+ nvmem-cells = <&shift_sel_port2_tx_a>,
+ <&shift_sel_port2_tx_b>,
+ <&shift_sel_port2_tx_c>,
+ <&shift_sel_port2_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+
+ internal_phy4: phy@4 {
+ reg = <4>;
+
+ nvmem-cells = <&shift_sel_port3_tx_a>,
+ <&shift_sel_port3_tx_b>,
+ <&shift_sel_port3_tx_c>,
+ <&shift_sel_port3_tx_d>;
+ nvmem-cell-names = "tx_a", "tx_b", "tx_c", "tx_d";
+ };
+ };
+ };
+ };