[v5,03/13] dt-bindings: serial: Add compatible for Renesas RZ/T2H SoC in sci

Commit Message

Thierry Bultel March 25, 2025, 4:08 p.m. UTC

The SCI of RZ/T2H SoC (a.k.a r9a09g077), as a lot
of similarities with other Renesas SoC like G2L, G3S, V2L;
However, it has a different set of registers, and in addition to serial,
this IP also supports SCIe (encoder), SmartCard, i2c and spi.
This is why the 'renesas,sci' fallback for generic SCI does not apply for it.

Reviewed-by: Rob Herring (Arm) <[e-mail]>
Signed-off-by: Thierry Bultel <[e-mail]>
---
Changes v4->v5: none
Changes v3->v4:
  - Added more details in commit description about why renesas,sci 
    does not apply.
  - Removed uart-has-rtscts for !rzsci.
----
 .../bindings/serial/renesas,sci.yaml          | 63 ++++++++++++-------
 1 file changed, 39 insertions(+), 24 deletions(-)

Patch

diff --git a/Documentation/devicetree/bindings/serial/renesas,sci.yaml b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
index 64d3db6e54e5..13c5c47cd72f 100644
--- a/Documentation/devicetree/bindings/serial/renesas,sci.yaml
+++ b/Documentation/devicetree/bindings/serial/renesas,sci.yaml
@@ -9,9 +9,6 @@  title: Renesas Serial Communication Interface
 maintainers:
   - Geert Uytterhoeven <[e-mail]>
 
-allOf:
-  - $ref: serial.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -22,6 +19,8 @@  properties:
               - renesas,r9a07g054-sci     # RZ/V2L
           - const: renesas,sci            # generic SCI compatible UART
 
+      - const: renesas,r9a09g077-sci      # RZ/T2H
+
       - items:
           - const: renesas,sci            # generic SCI compatible UART
 
@@ -54,8 +53,6 @@  properties:
         - fck # UART functional clock
         - sck # optional external clock input
 
-  uart-has-rtscts: false
-
 required:
   - compatible
   - reg
@@ -63,25 +60,43 @@  required:
   - clocks
   - clock-names
 
-if:
-  properties:
-    compatible:
-      contains:
-        enum:
-          - renesas,r9a07g043-sci
-          - renesas,r9a07g044-sci
-          - renesas,r9a07g054-sci
-then:
-  properties:
-    resets:
-      maxItems: 1
-
-    power-domains:
-      maxItems: 1
-
-  required:
-    - resets
-    - power-domains
+allOf:
+  - $ref: serial.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,r9a09g077-sci
+    then:
+      properties:
+        power-domains:
+          maxItems: 1
+      required:
+        - power-domains
+
+    else:
+      properties:
+        uart-has-rtscts: false
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - renesas,r9a07g043-sci
+              - renesas,r9a07g044-sci
+              - renesas,r9a07g054-sci
+    then:
+      properties:
+        resets:
+          maxItems: 1
+
+        power-domains:
+          maxItems: 1
+
+      required:
+        - resets
+        - power-domains
 
 unevaluatedProperties: false