linux-kernel - [PATCH v2 1/1] dt-bindings: timer: Add fsl,timrot.yaml

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Message-Id: <20250528165351.691848-1-Frank.Li@nxp.com>
Date: Wed, 28 May 2025 12:53:50 -0400
From: Frank Li <Frank.Li@....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>,
	linux-kernel@...r.kernel.org (open list:CLOCKSOURCE, CLOCKEVENT DRIVERS),
	devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS)
Cc: imx@...ts.linux.dev
Subject: [PATCH v2 1/1] dt-bindings: timer: Add fsl,timrot.yaml

Add fsl,timrot.yaml for i.MX23/i.MX28 timer.

Also add a generic fallback compatible string "fsl,timrot" for legacy
devices, which have existed for over 15 years.

Signed-off-by: Frank Li <Frank.Li@....com>
---
change in v2
- Use items for interrupts
- update commit message to said for legancy devices.
---
 .../devicetree/bindings/timer/fsl,timrot.yaml | 49 +++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/timer/fsl,timrot.yaml

diff --git a/Documentation/devicetree/bindings/timer/fsl,timrot.yaml b/Documentation/devicetree/bindings/timer/fsl,timrot.yaml
new file mode 100644
index 0000000000000..7c8effa37e494
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/fsl,timrot.yaml
@@ -0,0 +1,49 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/fsl,timrot.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MXS Timer
+
+maintainers:
+  - Frank Li <Frank.Li@....com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - fsl,imx23-timrot
+          - fsl,imx28-timrot
+      - const: fsl,timrot
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    items:
+      - description: irq for timer0
+      - description: irq for timer1
+      - description: irq for timer2
+      - description: irq for timer3
+
+  clocks:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    timer: timer@...68000 {
+        compatible = "fsl,imx28-timrot", "fsl,timrot";
+        reg = <0x80068000 0x2000>;
+        interrupts = <48>, <49>, <50>, <51>;
+        clocks = <&clks 26>;
+    };
+
-- 
2.34.1