dt-bindings: can: renesas,rcar-canfd: Document R-Car V4M support

Document support for the CAN-FD Interface on the Renesas R-Car V4M
(R8A779H0) SoC, which supports up to four channels.

The CAN-FD module on R-Car V4M is very similar to the one on R-Car V4H,
but differs in some hardware parameters, as reflected by the Parameter
Status Information part of the Global IP Version Register.  However,
none of this parameterization should have any impact on the driver, as
the driver does not access any register that is impacted by the
parameterization (except for the number of channels).

Signed-off-by: Duy Nguyen <duy.nguyen.rh@renesas.com>
[geert: Clarify R-Car V4M differences]
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/68b5f910bef89508e3455c768844ebe859d6ff1d.1722520779.git.geert+renesas@glider.be
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

diff --git a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
index d3f45d29fa0a550af93b2a206bcca0d4896f48d7..7c5ac5d2e880bbb8fa88f43cf5174939c8035e01 100644 (file)
--- a/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
+++ b/Documentation/devicetree/bindings/net/can/renesas,rcar-canfd.yaml
@@ -32,6 +32,7 @@ properties:
           - enum:
               - renesas,r8a779a0-canfd     # R-Car V3U
               - renesas,r8a779g0-canfd     # R-Car V4H
+              - renesas,r8a779h0-canfd     # R-Car V4M
           - const: renesas,rcar-gen4-canfd # R-Car Gen4
 
       - items:
@@ -163,14 +164,23 @@ allOf:
           maxItems: 1
 
   - if:
-      not:
-        properties:
-          compatible:
-            contains:
-              const: renesas,rcar-gen4-canfd
+      properties:
+        compatible:
+          contains:
+            const: renesas,r8a779h0-canfd
     then:
       patternProperties:
-        "^channel[2-7]$": false
+        "^channel[5-7]$": false
+    else:
+      if:
+        not:
+          properties:
+            compatible:
+              contains:
+                const: renesas,rcar-gen4-canfd
+      then:
+        patternProperties:
+          "^channel[2-7]$": false
 
 unevaluatedProperties: false