linux-kernel - [PATCH 2/3] dt-bindings: interrupt-controller: sifive,plic: add legacy riscv compatible

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Date:   Fri,  5 Aug 2022 17:28:44 +0100
From:   Conor Dooley <mail@...chuod.ie>
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>,
        Albert Ou <aou@...s.berkeley.edu>
Cc:     Daniel Lezcano <daniel.lezcano@...aro.org>,
        Anup Patel <anup@...infault.org>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Guo Ren <guoren@...nel.org>,
        Sagar Kadam <sagar.kadam@...ive.com>,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv@...ts.infradead.org, qemu-riscv@...gnu.org,
        Rob Herring <robh@...nel.org>
Subject: [PATCH 2/3] dt-bindings: interrupt-controller: sifive,plic: add legacy riscv compatible

From: Conor Dooley <conor.dooley@...rochip.com>

While "real" hardware might not use the compatible string "riscv,plic0"
it is present in the driver & QEMU uses it for automatically generated
virt machine dtbs. To avoid dt-validate problems with QEMU produced
dtbs, such as the following, add it to the binding.

riscv-virt.dtb: plic@...0000: compatible: 'oneOf' conditional failed, one must be fixed:
        'sifive,plic-1.0.0' is not one of ['sifive,fu540-c000-plic', 'starfive,jh7100-plic', 'canaan,k210-plic']
        'sifive,plic-1.0.0' is not one of ['allwinner,sun20i-d1-plic']
        'sifive,plic-1.0.0' was expected
        'thead,c900-plic' was expected
riscv-virt.dtb: plic@...0000: '#address-cells' is a required property

Reported-by: Rob Herring <robh@...nel.org>
Link: https://lore.kernel.org/linux-riscv/20220803170552.GA2250266-robh@kernel.org/
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
 .../bindings/interrupt-controller/sifive,plic-1.0.0.yaml     | 5 +++++
 1 file changed, 5 insertions(+)

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 92e0f8c3eff2..eb07c4f1a201 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
@@ -66,6 +66,11 @@ properties:
           - enum:
               - allwinner,sun20i-d1-plic
           - const: thead,c900-plic
+      - items:
+          - const: sifive,plic-1.0.0
+          - const: riscv,plic0
+        deprecated: true
+        description: For legacy systems & the qemu virt machine only
 
   reg:
     maxItems: 1
-- 
2.37.1