linux-kernel - [PATCH v3] dt-bindings: watchdog: Convert mpc8xxx-wdt to YAML

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Message-Id: <20250220-ppcyaml-wdt-v3-1-a0e2ba9b616e@posteo.net>
Date: Thu, 20 Feb 2025 13:37:38 +0100
From: J. Neuschäfer via B4 Relay <devnull+j.ne.posteo.net@...nel.org>
To: Wim Van Sebroeck <wim@...ux-watchdog.org>, 
 Guenter Roeck <linux@...ck-us.net>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>
Cc: linux-watchdog@...r.kernel.org, devicetree@...r.kernel.org, 
 linux-kernel@...r.kernel.org, 
 J. Neuschäfer <j.ne@...teo.net>
Subject: [PATCH v3] dt-bindings: watchdog: Convert mpc8xxx-wdt to YAML

From: "J. Neuschäfer" <j.ne@...teo.net>

Convert mpc83xx-wdt.txt to YAML to enable automatic schema validation.

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>
Signed-off-by: J. Neuschäfer <j.ne@...teo.net>
---
V3:
- split out as a single patch
- remove unnecessary node labels in examples

V2:
- part of series [PATCH v2 00/12] YAML conversion of several Freescale/PowerPC DT bindings
  Link: https://lore.kernel.org/lkml/20250207-ppcyaml-v2-7-8137b0c42526@posteo.net/
- trim subject line (remove "binding")
- fix property order to comply with dts coding style
---
 .../devicetree/bindings/watchdog/mpc8xxx-wdt.txt   | 25 ---------
 .../devicetree/bindings/watchdog/mpc8xxx-wdt.yaml  | 64 ++++++++++++++++++++++
 2 files changed, 64 insertions(+), 25 deletions(-)

diff --git a/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt
deleted file mode 100644
index a384ff5b3ce8c62d813fc23d72f74e2158ff543e..0000000000000000000000000000000000000000
--- a/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.txt
+++ /dev/null
@@ -1,25 +0,0 @@
-* Freescale mpc8xxx watchdog driver (For 83xx, 86xx and 8xx)
-
-Required properties:
-- compatible: Shall contain one of the following:
-	"mpc83xx_wdt" for an mpc83xx
-	"fsl,mpc8610-wdt" for an mpc86xx
-	"fsl,mpc823-wdt" for an mpc8xx
-- reg: base physical address and length of the area hosting the
-       watchdog registers.
-		On the 83xx, "Watchdog Timer Registers" area:	<0x200 0x100>
-		On the 86xx, "Watchdog Timer Registers" area:	<0xe4000 0x100>
-		On the 8xx, "General System Interface Unit" area: <0x0 0x10>
-
-Optional properties:
-- reg: additional physical address and length (4) of location of the
-       Reset Status Register (called RSTRSCR on the mpc86xx)
-		On the 83xx, it is located at offset 0x910
-		On the 86xx, it is located at offset 0xe0094
-		On the 8xx, it is located at offset 0x288
-
-Example:
-		WDT: watchdog@0 {
-		    compatible = "fsl,mpc823-wdt";
-		    reg = <0x0 0x10 0x288 0x4>;
-		};
diff --git a/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.yaml b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..67ad4f1eda8de0799954cb5a87df613ea53a2864
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/mpc8xxx-wdt.yaml
@@ -0,0 +1,64 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/mpc8xxx-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale MPC8xxx watchdog timer (For 83xx, 86xx and 8xx)
+
+maintainers:
+  - J. Neuschäfer <j.ne@...teo.net>
+
+properties:
+  compatible:
+    enum:
+      - mpc83xx_wdt       # for an mpc83xx
+      - fsl,mpc8610-wdt   # for an mpc86xx
+      - fsl,mpc823-wdt    # for an mpc8xx
+
+  device_type:
+    const: watchdog
+
+  reg:
+    minItems: 1
+    items:
+      - description: |
+          Base physical address and length of the area hosting the watchdog
+          registers.
+
+          On the 83xx, "Watchdog Timer Registers" area:     <0x200 0x100>
+          On the 86xx, "Watchdog Timer Registers" area:     <0xe4000 0x100>
+          On the 8xx, "General System Interface Unit" area: <0x0 0x10>
+
+      - description: |
+          Additional optional physical address and length (4) of location of
+          the Reset Status Register (called RSTRSCR on the mpc86xx)
+
+          On the 83xx, it is located at offset 0x910
+          On the 86xx, it is located at offset 0xe0094
+          On the 8xx, it is located at offset 0x288
+
+required:
+  - compatible
+  - reg
+
+allOf:
+  - $ref: watchdog.yaml#
+
+additionalProperties: false
+
+examples:
+  - |
+    watchdog@0 {
+        compatible = "fsl,mpc823-wdt";
+        reg = <0x0 0x10 0x288 0x4>;
+    };
+
+  - |
+    watchdog@200 {
+        compatible = "mpc83xx_wdt";
+        reg = <0x200 0x100>;
+        device_type = "watchdog";
+    };
+
+...

---
base-commit: 2014c95afecee3e76ca4a56956a936e23283f05b
change-id: 20250220-ppcyaml-wdt-130a3ae38a9f

Best regards,
-- 
J. Neuschäfer <j.ne@...teo.net>