[PATCH 1/2] dt-bindings: i2c: mt7621: add Airoha AN7589

[John Crispin <john@phrozen.org>]

The Airoha AN7589 carries the MT7621 I2C controller with a second
control register holding a wider clock divider. Give it a compatible of
its own so the driver can tell the variants apart.

Signed-off-by: John Crispin <john@phrozen.org>
---
 .../devicetree/bindings/i2c/mediatek,mt7621-i2c.yaml      | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/i2c/mediatek,mt7621-i2c.yaml b/Documentation/devicetree/bindings/i2c/mediatek,mt7621-i2c.yaml
index 118ec00fc190..28659bdd72f5 100644
--- a/Documentation/devicetree/bindings/i2c/mediatek,mt7621-i2c.yaml
+++ b/Documentation/devicetree/bindings/i2c/mediatek,mt7621-i2c.yaml
@@ -9,12 +9,18 @@ maintainers:
 
 title: Mediatek MT7621/MT7628 I2C master controller
 
+description:
+  The same controller is used on Airoha SoCs. The AN7589 variant adds a
+  second control register with a wider clock divider.
+
 allOf:
   - $ref: /schemas/i2c/i2c-controller.yaml#
 
 properties:
   compatible:
-    const: mediatek,mt7621-i2c
+    enum:
+      - airoha,an7589-i2c
+      - mediatek,mt7621-i2c
 
   reg:
     maxItems: 1
-- 
2.34.1