netdev - [PATCH 2/6] dt-bindings: can: nxp,sja1000: Document RZ/N1{D,S} support

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Date:   Sat,  2 Jul 2022 15:01:26 +0100
From:   Biju Das <biju.das.jz@...renesas.com>
To:     Wolfgang Grandegger <wg@...ndegger.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>
Cc:     Biju Das <biju.das.jz@...renesas.com>, linux-can@...r.kernel.org,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Chris Paterson <Chris.Paterson2@...esas.com>,
        Biju Das <biju.das@...renesas.com>,
        linux-renesas-soc@...r.kernel.org
Subject: [PATCH 2/6] dt-bindings: can: nxp,sja1000: Document RZ/N1{D,S} support

Add CAN binding documentation for Renesas RZ/N1 SoC.

The SJA1000 CAN controller on RZ/N1 SoC has some differences compared
to others like it has no clock divider register (CDR) support and it has
no HW loopback(HW doesn't see tx messages on rx), so introduced a new
compatible 'renesas,rzn1-sja1000' to handle these differences.

Signed-off-by: Biju Das <biju.das.jz@...renesas.com>
---
 .../bindings/net/can/nxp,sja1000.yaml         | 22 +++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Documentation/devicetree/bindings/net/can/nxp,sja1000.yaml b/Documentation/devicetree/bindings/net/can/nxp,sja1000.yaml
index 91d0f1b25d10..d0d374b979ec 100644
--- a/Documentation/devicetree/bindings/net/can/nxp,sja1000.yaml
+++ b/Documentation/devicetree/bindings/net/can/nxp,sja1000.yaml
@@ -16,6 +16,12 @@ properties:
         const: nxp,sja1000
       - description: Technologic Systems SJA1000 CAN Controller
         const: technologic,sja1000
+      - description: Renesas RZ/N1 SJA1000 CAN Controller
+        items:
+          - enum:
+              - renesas,r9a06g032-sja1000 # RZ/N1D
+              - renesas,r9a06g033-sja1000 # RZ/N1S
+          - const: renesas,rzn1-sja1000 # RZ/N1
 
   reg:
     maxItems: 1
@@ -23,6 +29,12 @@ properties:
   interrupts:
     maxItems: 1
 
+  clocks:
+    maxItems: 1
+
+  clock-names:
+    const: can_clk
+
   reg-io-width:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: I/O register width (in bytes) implemented by this device
@@ -91,6 +103,16 @@ allOf:
       required:
         - reg-io-width
 
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: renesas,rzn1-sja1000
+    then:
+      required:
+        - clocks
+        - clock-names
+
 unevaluatedProperties: false
 
 examples:
-- 
2.25.1