1 files changed, 80 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
new file mode 100644
index 000000000000..ab8867e6939b
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nxp,tja11xx.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0+
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/net/nxp,tja11xx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP TJA11xx PHY
+
+maintainers:
+  - Andrew Lunn <andrew@lunn.ch>
+  - Florian Fainelli <f.fainelli@gmail.com>
+  - Heiner Kallweit <hkallweit1@gmail.com>
+
+description:
+  Bindings for NXP TJA11xx automotive PHYs
+
+allOf:
+  - $ref: ethernet-phy.yaml#
+
+patternProperties:
+  "^ethernet-phy@[0-9a-f]+$":
+    type: object
+    description: |
+      Some packages have multiple PHYs. Secondary PHY should be defines as
+      subnode of the first (parent) PHY.
+
+    properties:
+      reg:
+        minimum: 0
+        maximum: 31
+        description:
+          The ID number for the child PHY. Should be +1 of parent PHY.
+
+      nxp,rmii-refclk-in:
+        type: boolean
+        description: |
+          The REF_CLK is provided for both transmitted and received data
+          in RMII mode. This clock signal is provided by the PHY and is
+          typically derived from an external 25MHz crystal. Alternatively,
+          a 50MHz clock signal generated by an external oscillator can be
+          connected to pin REF_CLK. A third option is to connect a 25MHz
+          clock to pin CLK_IN_OUT. So, the REF_CLK should be configured
+          as input or output according to the actual circuit connection.
+          If present, indicates that the REF_CLK will be configured as
+          interface reference clock input when RMII mode enabled.
+          If not present, the REF_CLK will be configured as interface
+          reference clock output when RMII mode enabled.
+          Only supported on TJA1100 and TJA1101.
+
+    required:
+      - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        tja1101_phy0: ethernet-phy@4 {
+            reg = <0x4>;
+            nxp,rmii-refclk-in;
+        };
+    };
+  - |
+    mdio {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        tja1102_phy0: ethernet-phy@4 {
+            reg = <0x4>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            tja1102_phy1: ethernet-phy@5 {
+                reg = <0x5>;
+            };
+        };
+    };