linux-kernel - [PATCH] dt-bindings: timer: Convert faraday,fttmr010 to DT schema

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Message-ID: <20250506022241.2587534-1-robh@kernel.org>
Date: Mon,  5 May 2025 21:22:40 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Joel Stanley <joel@....id.au>,
	Linus Walleij <linus.walleij@...aro.org>
Cc: linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH] dt-bindings: timer: Convert faraday,fttmr010 to DT schema

Convert the Faraday fttmr010 Timer binding to DT schema format. Adjust
the compatible string values to match what's in use. The number of
interrupts can also be anywhere from 1 to 8. The clock-names order was
reversed compared to what's used.

Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
---
 .../bindings/timer/faraday,fttmr010.txt       | 38 --------
 .../bindings/timer/faraday,fttmr010.yaml      | 89 +++++++++++++++++++
 2 files changed, 89 insertions(+), 38 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/timer/faraday,fttmr010.txt
 create mode 100644 Documentation/devicetree/bindings/timer/faraday,fttmr010.yaml

diff --git a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt b/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt
deleted file mode 100644
index 3cb2f4c98d64..000000000000
--- a/Documentation/devicetree/bindings/timer/faraday,fttmr010.txt
+++ /dev/null
@@ -1,38 +0,0 @@
-Faraday Technology timer
-
-This timer is a generic IP block from Faraday Technology, embedded in the
-Cortina Systems Gemini SoCs and other designs.
-
-Required properties:
-
-- compatible : Must be one of
-  "faraday,fttmr010"
-  "cortina,gemini-timer", "faraday,fttmr010"
-  "moxa,moxart-timer", "faraday,fttmr010"
-  "aspeed,ast2400-timer"
-  "aspeed,ast2500-timer"
-  "aspeed,ast2600-timer"
-
-- reg : Should contain registers location and length
-- interrupts : Should contain the three timer interrupts usually with
-  flags for falling edge
-
-Optionally required properties:
-
-- clocks : a clock to provide the tick rate for "faraday,fttmr010"
-- clock-names : should be "EXTCLK" and "PCLK" for the external tick timer
-  and peripheral clock respectively, for "faraday,fttmr010"
-- syscon : a phandle to the global Gemini system controller if the compatible
-  type is "cortina,gemini-timer"
-
-Example:
-
-timer@...00000 {
-	compatible = "faraday,fttmr010";
-	reg = <0x43000000 0x1000>;
-	interrupts = <14 IRQ_TYPE_EDGE_FALLING>, /* Timer 1 */
-		   <15 IRQ_TYPE_EDGE_FALLING>, /* Timer 2 */
-		   <16 IRQ_TYPE_EDGE_FALLING>; /* Timer 3 */
-	clocks = <&extclk>, <&pclk>;
-	clock-names = "EXTCLK", "PCLK";
-};
diff --git a/Documentation/devicetree/bindings/timer/faraday,fttmr010.yaml b/Documentation/devicetree/bindings/timer/faraday,fttmr010.yaml
new file mode 100644
index 000000000000..6f67ec0505bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/timer/faraday,fttmr010.yaml
@@ -0,0 +1,89 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/timer/faraday,fttmr010.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Faraday FTTMR010 timer
+
+maintainers:
+  - Joel Stanley <joel@....id.au>
+  - Linus Walleij <linus.walleij@...aro.org>
+
+description:
+  This timer is a generic IP block from Faraday Technology, embedded in the
+  Cortina Systems Gemini SoCs and other designs.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - const: moxa,moxart-timer
+          - const: faraday,fttmr010
+      - enum:
+          - aspeed,ast2400-timer
+          - aspeed,ast2500-timer
+          - aspeed,ast2600-timer
+          - cortina,gemini-timer
+          - faraday,fttmr010
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    minItems: 1
+    maxItems: 8
+    description: One interrupt per timer
+
+  clocks:
+    minItems: 1
+    items:
+      - description: Peripheral clock
+      - description: External tick clock
+
+  clock-names:
+    minItems: 1
+    items:
+      - const: PCLK
+      - const: EXTCLK
+
+  resets:
+    maxItems: 1
+
+  syscon:
+    description: System controller phandle for Gemini systems
+    $ref: /schemas/types.yaml#/definitions/phandle
+
+required:
+  - compatible
+  - reg
+  - interrupts
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: cortina,gemini-timer
+    then:
+      required:
+        - syscon
+    else:
+      properties:
+        syscon: false
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    timer@...00000 {
+        compatible = "faraday,fttmr010";
+        reg = <0x43000000 0x1000>;
+        interrupts = <14 IRQ_TYPE_EDGE_FALLING>, /* Timer 1 */
+                    <15 IRQ_TYPE_EDGE_FALLING>, /* Timer 2 */
+                    <16 IRQ_TYPE_EDGE_FALLING>; /* Timer 3 */
+        clocks = <&extclk>, <&pclk>;
+        clock-names = "EXTCLK", "PCLK";
+    };
-- 
2.47.2