Subject: [PATCH v1 1/2] dt-bindings: net: micrel: Convert to DT schema

From: Stefan Eichenberger <[email-masked]>
Date: Tue, 23 Dec 2025 14:33:39 +0100

From: Stefan Eichenberger <[email-masked]>

Convert the devicetree bindings for the Micrel PHYs and switches to DT
schema.

Signed-off-by: Stefan Eichenberger <[email-masked]>
---
 .../devicetree/bindings/net/micrel.txt        |  57 --------
 .../devicetree/bindings/net/micrel.yaml       | 132 ++++++++++++++++++
 2 files changed, 132 insertions(+), 57 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/net/micrel.txt
 create mode 100644 Documentation/devicetree/bindings/net/micrel.yaml

diff --git a/Documentation/devicetree/bindings/net/micrel.txt b/Documentation/devicetree/bindings/net/micrel.txt
deleted file mode 100644
index 01622ce58112e..0000000000000
--- a/Documentation/devicetree/bindings/net/micrel.txt
+++ /dev/null
@@ -1,57 +0,0 @@
-Micrel PHY properties.
-
-These properties cover the base properties Micrel PHYs.
-
-Optional properties:
-
- - micrel,led-mode : LED mode value to set for PHYs with configurable LEDs.
-
-	Configure the LED mode with single value. The list of PHYs and the
-	bits that are currently supported:
-
-	KSZ8001: register 0x1e, bits 15..14
-	KSZ8041: register 0x1e, bits 15..14
-	KSZ8021: register 0x1f, bits 5..4
-	KSZ8031: register 0x1f, bits 5..4
-	KSZ8051: register 0x1f, bits 5..4
-	KSZ8081: register 0x1f, bits 5..4
-	KSZ8091: register 0x1f, bits 5..4
-	LAN8814: register EP5.0, bit 6
-
-	See the respective PHY datasheet for the mode values.
-
- - micrel,rmii-reference-clock-select-25-mhz: RMII Reference Clock Select
-						bit selects 25 MHz mode
-
-	Setting the RMII Reference Clock Select bit enables 25 MHz rather
-	than 50 MHz clock mode.
-
-	Note that this option is only needed for certain PHY revisions with a
-	non-standard, inverted function of this configuration bit.
-	Specifically, a clock reference ("rmii-ref" below) is always needed to
-	actually select a mode.
-
- - clocks, clock-names: contains clocks according to the common clock bindings.
-
-	supported clocks:
-	- KSZ8021, KSZ8031, KSZ8081, KSZ8091: "rmii-ref": The RMII reference
-	  input clock. Used to determine the XI input clock.
-
- - micrel,fiber-mode: If present the PHY is configured to operate in fiber mode
-
-	Some PHYs, such as the KSZ8041FTL variant, support fiber mode, enabled
-	by the FXEN boot strapping pin. It can't be determined from the PHY
-	registers whether the PHY is in fiber mode, so this boolean device tree
-	property can be used to describe it.
-
-	In fiber mode, auto-negotiation is disabled and the PHY can only work in
-	100base-fx (full and half duplex) modes.
-
- - coma-mode-gpios: If present the given gpio will be deasserted when the
-		    PHY is probed.
-
-	Some PHYs have a COMA mode input pin which puts the PHY into
-	isolate and power-down mode. On some boards this input is connected
-	to a GPIO of the SoC.
-
-	Supported on the LAN8814.
diff --git a/Documentation/devicetree/bindings/net/micrel.yaml b/Documentation/devicetree/bindings/net/micrel.yaml
new file mode 100644
index 0000000000000..a8e532fbcb6f5
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/micrel.yaml
@@ -0,0 +1,132 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/micrel.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Micrel KSZ series PHYs and switches
+
+maintainers:
+  - Andrew Lunn <[email-masked]>
+  - Stefan Eichenberger <[email-masked]>
+
+description: |
+  The Micrel KSZ series contains different network phys and switches.
+
+properties:
+  compatible:
+    enum:
+      - ethernet-phy-id000e.7237  # KSZ8873MLL
+      - ethernet-phy-id0022.1430  # KSZ886X
+      - ethernet-phy-id0022.1435  # KSZ8863
+      - ethernet-phy-id0022.1510  # KSZ8041
+      - ethernet-phy-id0022.1537  # KSZ8041RNLI
+      - ethernet-phy-id0022.1550  # KSZ8051
+      - ethernet-phy-id0022.1555  # KSZ8021
+      - ethernet-phy-id0022.1556  # KSZ8031
+      - ethernet-phy-id0022.1560  # KSZ8081, KSZ8091
+      - ethernet-phy-id0022.1570  # KSZ8061
+      - ethernet-phy-id0022.161a  # KSZ8001
+      - ethernet-phy-id0022.1720  # KS8737
+  micrel,fiber-mode:
+    type: boolean
+    description: |
+      If present the PHY is configured to operate in fiber mode.
+
+      The KSZ8041FTL variant supports fiber mode, enabled by the FXEN
+      boot strapping pin. It can't be determined from the PHY registers
+      whether the PHY is in fiber mode, so this boolean device tree
+      property can be used to describe it.
+
+      In fiber mode, auto-negotiation is disabled and the PHY can only
+      work in 100base-fx (full and half duplex) modes.
+  micrel,led-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description: |
+      LED mode value to set for PHYs with configurable LEDs.
+
+      Configure the LED mode with single value. The list of PHYs and the
+      bits that are currently supported:
+
+      KSZ8001: register 0x1e, bits 15..14
+      KSZ8041: register 0x1e, bits 15..14
+      KSZ8021: register 0x1f, bits 5..4
+      KSZ8031: register 0x1f, bits 5..4
+      KSZ8051: register 0x1f, bits 5..4
+      KSZ8081: register 0x1f, bits 5..4
+      KSZ8091: register 0x1f, bits 5..4
+
+      See the respective PHY datasheet for the mode values.
+    minimum: 0
+    maximum: 3
+
+allOf:
+  - $ref: ethernet-phy.yaml#
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              const: ethernet-phy-id0022.1510
+    then:
+      properties:
+        micrel,fiber-mode: false
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - ethernet-phy-id0022.1510
+                - ethernet-phy-id0022.1555
+                - ethernet-phy-id0022.1556
+                - ethernet-phy-id0022.1550
+                - ethernet-phy-id0022.1560
+                - ethernet-phy-id0022.161a
+    then:
+      properties:
+        micrel,led-mode: false
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - ethernet-phy-id0022.1555
+              - ethernet-phy-id0022.1556
+              - ethernet-phy-id0022.1560
+    then:
+      properties:
+        clocks:
+          maxItems: 1
+        clock-names:
+          const: rmii-ref
+          description: |
+            supported clocks:
+              - The RMII reference input clock. Used to determine the XI
+                input clock.
+        micrel,rmii-reference-clock-select-25-mhz:
+          type: boolean
+          description: |
+            RMII Reference Clock Select bit selects 25 MHz mode
+
+            Setting the RMII Reference Clock Select bit enables 25 MHz rather
+            than 50 MHz clock mode.
+
+dependentRequired:
+  micrel,rmii-reference-clock-select-25-mhz: [ clock-names ]
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    ethernet {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        ethernet-phy@5 {
+            compatible = "ethernet-phy-id0022.1510";
+            reg = <5>;
+            micrel,led-mode = <2>;
+            micrel,fiber-mode;
+        };
+    };
-- 
2.51.0