linux-kernel - [PATCH v3 1/1] dt-bindings: interrupt-controller: Add arm,armv7m-nvic and fix #interrupt-cells

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Message-Id: <20250624224630.2518776-1-Frank.Li@nxp.com>
Date: Tue, 24 Jun 2025 18:46:30 -0400
From: Frank Li <Frank.Li@....com>
To: Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	linux-kernel@...r.kernel.org (open list:IRQCHIP DRIVERS),
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
Cc: imx@...ts.linux.dev
Subject: [PATCH v3 1/1] dt-bindings: interrupt-controller: Add arm,armv7m-nvic and fix #interrupt-cells

According to existed dts arch/arm/boot/dts/armv7-m.dtsi and driver
drivers/irqchip/irq-nvic.c, compatible string should be arm,armv7m-nvic,

Fix below CHECK_DTB warning:

arch/arm/boot/dts/nxp/vf/vf610m4-cosmic.dtb: /interrupt-controller@...0e100:
    failed to match any schema with compatible: ['arm,armv7m-nvic']

Signed-off-by: Frank Li <Frank.Li@....com>
---
change in v3
- keep arm,v7(6,8)m-nvic compatible string according to rob's suggestion
- allow 1 and 2 for #interrupt-cells according to rob's suggestion
- keep arm,num-irq-priority-bits as required according to rob's suggestion

change in v2:
- fix example interrupt-cells
- commit message add driver information
- remove unused compatible string
---
 .../devicetree/bindings/interrupt-controller/arm,nvic.yaml     | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/arm,nvic.yaml b/Documentation/devicetree/bindings/interrupt-controller/arm,nvic.yaml
index d89eca956c5fa..32dfa2bf05d84 100644
--- a/Documentation/devicetree/bindings/interrupt-controller/arm,nvic.yaml
+++ b/Documentation/devicetree/bindings/interrupt-controller/arm,nvic.yaml
@@ -17,6 +17,7 @@ description:
 properties:
   compatible:
     enum:
+      - arm,armv7m-nvic # deprecated
       - arm,v6m-nvic
       - arm,v7m-nvic
       - arm,v8m-nvic
@@ -30,7 +31,7 @@ properties:
   interrupt-controller: true
 
   '#interrupt-cells':
-    const: 2
+    enum: [1, 2]
     description: |
       Number of cells to encode an interrupt source:
       first = interrupt number, second = priority.
-- 
2.34.1