[PATCH v5 05/13] dt-bindings: net: micrel: Fix RMII clock select property type

[Stefano Radaelli <stefano.radaelli21@gmail.com>]

From: Stefano Radaelli <stefano.r@variscite.com>

The binding describes micrel,rmii-reference-clock-select-25-mhz as a
boolean. dt-schema requires properties ending in -mhz to contain an
unsigned integer value. A bare property therefore produces a
property-units.yaml type warning.

Describe 25 MHz selection as <1> and keep the property restricted to
KSZ8021, KSZ8031, KSZ8081 and KSZ8091 PHYs, which have the RMII
reference clock select bit. The driver checks only for the property
presence, so this does not change runtime behavior.

Acked-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Stefano Radaelli <stefano.r@variscite.com>
---
v4->v5:
 - Collect Rob Herring's Acked-by; no binding changes.

 .../devicetree/bindings/net/micrel.yaml       | 27 ++++++++++++++-----
 1 file changed, 20 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/net/micrel.yaml b/Documentation/devicetree/bindings/net/micrel.yaml
index 6fa568057b92..a1f876dc00de 100644
--- a/Documentation/devicetree/bindings/net/micrel.yaml
+++ b/Documentation/devicetree/bindings/net/micrel.yaml
@@ -63,6 +63,14 @@ properties:
     minimum: 0
     maximum: 3
 
+  micrel,rmii-reference-clock-select-25-mhz:
+    enum: [ 1 ]
+    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.
+
 allOf:
   - $ref: ethernet-phy.yaml#
   - if:
@@ -90,6 +98,18 @@ allOf:
     then:
       properties:
         micrel,led-mode: false
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - ethernet-phy-id0022.1555
+                - ethernet-phy-id0022.1556
+                - ethernet-phy-id0022.1560
+    then:
+      properties:
+        micrel,rmii-reference-clock-select-25-mhz: false
   - if:
       properties:
         compatible:
@@ -105,13 +125,6 @@ allOf:
           description:
             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 ]
-- 
2.47.3