linux-kernel - [PATCH v2] dt-bindings: timer: Add SiFive CLINT2

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Message-Id: <20250314081255.3718-1-nick.hu@sifive.com>
Date: Fri, 14 Mar 2025 16:12:54 +0800
From: Nick Hu <nick.hu@...ive.com>
To: Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Samuel Holland <samuel.holland@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Anup Patel <anup@...infault.org>
Cc: Nick Hu <nick.hu@...ive.com>,
	linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: [PATCH v2] dt-bindings: timer: Add SiFive CLINT2

Add compatible string and property for the SiFive CLINT v2.

Signed-off-by: Nick Hu <nick.hu@...ive.com>
Reviewed-by: Samuel Holland <samuel.holland@...ive.com>
---
- v2 changes:
  - Don't allow sifive,clint2 by itself. Add '-{}' to the first entry
  - Mark the sifive,fine-ctr-bits as the required property when
    the compatible includes the sifive,clint2

 .../bindings/timer/sifive,clint.yaml          | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/timer/sifive,clint.yaml b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
index 76d83aea4e2b..4b9dad11c1e9 100644
--- a/Documentation/devicetree/bindings/timer/sifive,clint.yaml
+++ b/Documentation/devicetree/bindings/timer/sifive,clint.yaml
@@ -36,6 +36,10 @@ properties:
               - starfive,jh7110-clint   # StarFive JH7110
               - starfive,jh8100-clint   # StarFive JH8100
           - const: sifive,clint0        # SiFive CLINT v0 IP block
+      - items:
+          - {}
+          - const: sifive,clint2        # SiFive CLINT v2 IP block
+        description: SiFive CLINT v2 is the HRT that supports the Zicntr
       - items:
           - enum:
               - allwinner,sun20i-d1-clint
@@ -62,6 +66,22 @@ properties:
     minItems: 1
     maxItems: 4095
 
+  sifive,fine-ctr-bits:
+    maximum: 15
+    description: The width in bits of the fine counter.
+
+if:
+  properties:
+    compatible:
+      contains:
+        const: sifive,clint2
+then:
+  required:
+    - sifive,fine-ctr-bits
+else:
+  properties:
+    sifive,fine-ctr-bits: false
+
 additionalProperties: false
 
 required:
-- 
2.17.1