linux-kernel - [PATCH RFC 1/2] dt-bindings: interrupt-controller: sifive,plic: Document Renesas RZ/Five SoC

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Date:   Tue, 24 May 2022 18:22:13 +0100
From:   Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Marc Zyngier <maz@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Sagar Kadam <sagar.kadam@...ive.com>,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Prabhakar <prabhakar.csengg@...il.com>,
        Phil Edworthy <phil.edworthy@...esas.com>,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: [PATCH RFC 1/2] dt-bindings: interrupt-controller: sifive,plic: Document Renesas RZ/Five SoC

Document Renesas RZ/Five (R9A07G043) SoC.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
---
 .../sifive,plic-1.0.0.yaml                    | 38 +++++++++++++++++--
 1 file changed, 35 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
index 27092c6a86c4..78ff31cb63e5 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml
@@ -28,7 +28,10 @@ description:
 
   While the PLIC supports both edge-triggered and level-triggered interrupts,
   interrupt handlers are oblivious to this distinction and therefore it is not
-  specified in the PLIC device-tree binding.
+  specified in the PLIC device-tree binding for SiFive PLIC (and similar PLIC's),
+  but for the Renesas RZ/Five Soc (AX45MP AndesCore) which has NCEPLIC100 we need
+  to specify the interrupt type as the flow for EDGE interrupts is different
+  compared to LEVEL interrupts.
 
   While the RISC-V ISA doesn't specify a memory layout for the PLIC, the
   "sifive,plic-1.0.0" device is a concrete implementation of the PLIC that
@@ -57,6 +60,7 @@ properties:
           - enum:
               - allwinner,sun20i-d1-plic
           - const: thead,c900-plic
+      - const: renesas-r9a07g043-plic
 
   reg:
     maxItems: 1
@@ -64,8 +68,7 @@ properties:
   '#address-cells':
     const: 0
 
-  '#interrupt-cells':
-    const: 1
+  '#interrupt-cells': true
 
   interrupt-controller: true
 
@@ -91,6 +94,35 @@ required:
   - interrupts-extended
   - riscv,ndev
 
+if:
+  properties:
+    compatible:
+      contains:
+        const: renesas-r9a07g043-plic
+then:
+  properties:
+    clocks:
+      maxItems: 1
+
+    resets:
+      maxItems: 1
+
+    power-domains:
+      maxItems: 1
+
+    '#interrupt-cells':
+      const: 2
+
+  required:
+    - clocks
+    - resets
+    - power-domains
+
+else:
+  properties:
+    '#interrupt-cells':
+      const: 1
+
 additionalProperties: false
 
 examples:
-- 
2.25.1