[PATCH v2] dt-bindings: net: microchip,lan78xx: convert to DT schema
From: Mikhail Lukianchikov
Date: Thu Jul 09 2026 - 14:20:54 EST
Convert the Microchip LAN78xx family (LAN7800, LAN7801, LAN7850) binding
documentation from plain text to DT schema.
The conversion adds proper validation for the 'microchip,led-modes'
property inside the MDIO node and updates the MAINTAINERS entry.
Signed-off-by: Mikhail Lukianchikov <avermoal@xxxxxxxxx>
---
Changes in v2:
- Rename file to microchip,lan7800.yaml.
- Keeps only one maintainer.
- Code style fixed.
- Example fixed, remove usb-port@1 node.
- Move patternProperties for PHY inside mdio node to fix validation. (suggested by sashiko-bot)
Link to v1: https://lore.kernel.org/netdev/20260707165840.107409-1-avermoal@xxxxxxxxx
.../bindings/net/microchip,lan7800.yaml | 105 ++++++++++++++++++
.../bindings/net/microchip,lan78xx.txt | 53 ---------
MAINTAINERS | 3 +-
3 files changed, 106 insertions(+), 55 deletions(-)
create mode 100644 Documentation/devicetree/bindings/net/microchip,lan7800.yaml
delete mode 100644 Documentation/devicetree/bindings/net/microchip,lan78xx.txt
diff --git a/Documentation/devicetree/bindings/net/microchip,lan7800.yaml b/Documentation/devicetree/bindings/net/microchip,lan7800.yaml
new file mode 100644
index 000000000000..289980c23181
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/microchip,lan7800.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/microchip,lan7800.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Microchip LAN7800/LAN7801/LAN7850 Gigabit Ethernet controller
+
+maintainers:
+ - Rengarajan Sundararajan <Rengarajan.S@xxxxxxxxxxxxx>
+
+description:
+ The LAN7800/LAN7801/LAN7850 devices are usually configured by
+ programming their OTP or with an external EEPROM, but some
+ platforms (e.g. Raspberry Pi 3 B+) have neither. The Device Tree
+ properties, if present, override the OTP and EEPROM.
+
+allOf:
+ - $ref: /schemas/usb/usb-device.yaml#
+ - $ref: /schemas/net/ethernet-controller.yaml#
+
+properties:
+ compatible:
+ enum:
+ - usb424,7800
+ - usb424,7801
+ - usb424,7850
+
+ reg:
+ maxItems: 1
+ description: USB port number
+
+ local-mac-address:
+ $ref: /schemas/types.yaml#/definitions/uint8-array
+ minItems: 6
+ maxItems: 6
+ description:
+ MAC address to use if not stored in OTP or EEPROM. If present,
+ overrides OTP/EEPROM.
+
+ mdio:
+ $ref: /schemas/net/mdio.yaml#
+ unevaluatedProperties: false
+
+ patternProperties:
+ "^ethernet-phy(@[0-9a-f]+)?$":
+ type: object
+ description: |
+ PHY node for the embedded or external PHY. The PHY address is
+ given by the 'reg' property.
+
+ properties:
+ reg:
+ maxItems: 1
+ description: PHY address.
+
+ microchip,led-modes:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 4
+ description:
+ Array of LED mode values for each of up to 4 LEDs.
+ Omitted LEDs are turned off. Allowed values are defined
+ in include/dt-bindings/net/microchip-lan78xx.h.
+
+ required:
+ - reg
+
+ additionalProperties: false
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/net/microchip-lan78xx.h>
+ / {
+ usb {
+ compatible = "usb-host";
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ ethernet@1 {
+ compatible = "usb424,7800";
+ reg = <1>;
+ local-mac-address = [00 11 22 33 44 55];
+
+ mdio {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ethernet-phy@1 {
+ reg = <1>;
+ microchip,led-modes = <
+ LAN78XX_LINK_1000_ACTIVITY
+ LAN78XX_LINK_10_100_ACTIVITY
+ >;
+ };
+ };
+ };
+ };
+ };
+...
diff --git a/Documentation/devicetree/bindings/net/microchip,lan78xx.txt b/Documentation/devicetree/bindings/net/microchip,lan78xx.txt
deleted file mode 100644
index 11a679530ae6..000000000000
--- a/Documentation/devicetree/bindings/net/microchip,lan78xx.txt
+++ /dev/null
@@ -1,53 +0,0 @@
-Microchip LAN78xx Gigabit Ethernet controller
-
-The LAN78XX devices are usually configured by programming their OTP or with
-an external EEPROM, but some platforms (e.g. Raspberry Pi 3 B+) have neither.
-The Device Tree properties, if present, override the OTP and EEPROM.
-
-Required properties:
-- compatible: Should be one of "usb424,7800", "usb424,7801" or "usb424,7850".
-
-The MAC address will be determined using the optional properties
-defined in ethernet.txt.
-
-Optional properties of the embedded PHY:
-- microchip,led-modes: a 0..4 element vector, with each element configuring
- the operating mode of an LED. Omitted LEDs are turned off. Allowed values
- are defined in "include/dt-bindings/net/microchip-lan78xx.h".
-
-Example:
-
-/* Based on the configuration for a Raspberry Pi 3 B+ */
-&usb {
- usb-port@1 {
- compatible = "usb424,2514";
- reg = <1>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- usb-port@1 {
- compatible = "usb424,2514";
- reg = <1>;
- #address-cells = <1>;
- #size-cells = <0>;
-
- ethernet: ethernet@1 {
- compatible = "usb424,7800";
- reg = <1>;
- local-mac-address = [ 00 11 22 33 44 55 ];
-
- mdio {
- #address-cells = <0x1>;
- #size-cells = <0x0>;
- eth_phy: ethernet-phy@1 {
- reg = <1>;
- microchip,led-modes = <
- LAN78XX_LINK_1000_ACTIVITY
- LAN78XX_LINK_10_100_ACTIVITY
- >;
- };
- };
- };
- };
- };
-};
diff --git a/MAINTAINERS b/MAINTAINERS
index f37a81950e25..157a677a284f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -27928,10 +27928,9 @@ F: drivers/usb/isp1760/*
USB LAN78XX ETHERNET DRIVER
M: Thangaraj Samynathan <Thangaraj.S@xxxxxxxxxxxxx>
M: Rengarajan Sundararajan <Rengarajan.S@xxxxxxxxxxxxx>
-M: UNGLinuxDriver@xxxxxxxxxxxxx
L: netdev@xxxxxxxxxxxxxxx
S: Maintained
-F: Documentation/devicetree/bindings/net/microchip,lan78xx.txt
+F: Documentation/devicetree/bindings/net/microchip,lan7800.yaml
F: drivers/net/usb/lan78xx.*
F: include/dt-bindings/net/microchip-lan78xx.h
--
2.52.0