[net-next v6 1/7] dt-bindings: net: Add MTIP L2 switch description

Lukasz Majewski
2025-04-18T06:07:52Z

This patch provides description of the MTIP L2 switch available in some
NXP's SOCs - e.g. imx287.

Signed-off-by: Lukasz Majewski <lukma@denx.de>
---
Changes for v2:
- Rename the file to match exactly the compatible
(nxp,imx287-mtip-switch)

Changes for v3:
- Remove '-' from const:'nxp,imx287-mtip-switch'
- Use '^port@[12]+$' for port patternProperties
- Drop status = "okay";
- Provide proper indentation for 'example' binding (replace 8
spaces with 4 spaces)
- Remove smsc,disable-energy-detect; property
- Remove interrupt-parent and interrupts properties as not required
- Remove #address-cells and #size-cells from required properties check
- remove description from reg:
- Add $ref: ethernet-switch.yaml#

Changes for v4:
- Use $ref: ethernet-switch.yaml#/$defs/ethernet-ports and remove already
referenced properties
- Rename file to nxp,imx28-mtip-switch.yaml

Changes for v5:
- Provide proper description for 'ethernet-port' node

Changes for v6:
- Proper usage of
$ref: ethernet-switch.yaml#/$defs/ethernet-ports/patternProperties
when specifying the 'ethernet-ports' property
- Add description and check for interrupt-names property
---
.../bindings/net/nxp,imx28-mtip-switch.yaml | 148 ++++++++++++++++++
1 file changed, 148 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/nxp,imx28-mtip-switch.yaml

diff --git a/Documentation/devicetree/bindings/net/nxp,imx28-mtip-switch.yaml b/Documentation/devicetree/bindings/net/nxp,imx28-mtip-switch.yaml
new file mode 100644
index 000000000000..3e2d724074d5
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nxp,imx28-mtip-switch.yaml
@@ -0,0 +1,148 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/nxp,imx28-mtip-switch.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP SoC Ethernet Switch Controller (L2 MoreThanIP switch)
+
+maintainers:
+ - Lukasz Majewski <lukma@denx.de>
+
+description:
+ The 2-port switch ethernet subsystem provides ethernet packet (L2)
+ communication and can be configured as an ethernet switch. It provides the
+ reduced media independent interface (RMII), the management data input
+ output (MDIO) for physical layer device (PHY) management.
+
+properties:
+ compatible:
+ const: nxp,imx28-mtip-switch
+
+ reg:
+ maxItems: 1
+
+ phy-supply:
+ description:
+ Regulator that powers Ethernet PHYs.
+
+ clocks:
+ items:
+ - description: Register accessing clock
+ - description: Bus access clock
+ - description: Output clock for external device - e.g. PHY source clock
+ - description: IEEE1588 timer clock
+
+ clock-names:
+ items:
+ - const: ipg
+ - const: ahb
+ - const: enet_out
+ - const: ptp
+
+ interrupts:
+ items:
+ - description: Switch interrupt
+ - description: ENET0 interrupt
+ - description: ENET1 interrupt
+
+ interrupt-names:
+ items:
+ - const: mtipl2sw
+ - const: enet0
+ - const: enet1
+
+ pinctrl-names: true
+
+ ethernet-ports:
+ type: object
+ $ref: ethernet-switch.yaml#/$defs/ethernet-ports/patternProperties
+ additionalProperties: true
+
+ patternProperties:
+ '^ethernet-port@[12]$':
+ type: object
+ additionalProperties: true
+ properties:
+ reg:
+ items:
+ - enum: [1, 2]
+ description: MTIP L2 switch port number
+
+ required:
+ - reg
+ - label
+ - phy-mode
+ - phy-handle
+
+ mdio:
+ type: object
+ $ref: mdio.yaml#
+ unevaluatedProperties: false
+ description:
+ Specifies the mdio bus in the switch, used as a container for phy nodes.
+
+required:
+ - compatible
+ - reg
+ - clocks
+ - clock-names
+ - interrupts
+ - interrupt-names
+ - mdio
+ - ethernet-ports
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include<dt-bindings/interrupt-controller/irq.h>
+ switch@800f0000 {
+ compatible = "nxp,imx28-mtip-switch";
+ reg = <0x800f0000 0x20000>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&mac0_pins_a>, <&mac1_pins_a>;
+ phy-supply = <&reg_fec_3v3>;
+ interrupts = <100>, <101>, <102>;
+ interrupt-names = "mtipl2sw", "enet0", "enet1";
+ clocks = <&clks 57>, <&clks 57>, <&clks 64>, <&clks 35>;
+ clock-names = "ipg", "ahb", "enet_out", "ptp";
+
+ ethernet-ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ mtip_port1: ethernet-port@1 {
+ reg = <1>;
+ label = "lan0";
+ local-mac-address = [ 00 00 00 00 00 00 ];
+ phy-mode = "rmii";
+ phy-handle = <&ethphy0>;
+ };
+
+ mtip_port2: ethernet-port@2 {
+ reg = <2>;
+ label = "lan1";
+ local-mac-address = [ 00 00 00 00 00 00 ];
+ phy-mode = "rmii";
+ phy-handle = <&ethphy1>;
+ };
+ };
+
+ mdio_sw: mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ reset-gpios = <&gpio2 13 0>;
+ reset-delay-us = <25000>;
+ reset-post-delay-us = <10000>;
+
+ ethphy0: ethernet-phy@0 {
+ reg = <0>;
+ };
+
+ ethphy1: ethernet-phy@1 {
+ reg = <1>;
+ };
+ };
+ };
--
2.39.5