dt-bindings: watchdog: Add fsl,scu-wdt yaml file

In order to replace the fsl,scu txt file from bindings/arm/freescale,
we need to split it between the right subsystems. This patch documents
separately the 'watchdog' child node of the SCU main node.

Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Viorel Suman <viorel.suman@nxp.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

1 files changed, 34 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/watchdog/fsl,scu-wdt.yaml b/Documentation/devicetree/bindings/watchdog/fsl,scu-wdt.yaml
new file mode 100644
index 000000000000..f84c45d687d7
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/fsl,scu-wdt.yaml
@@ -0,0 +1,34 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/fsl,scu-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX SCU Client Device Node - Watchdog bindings based on SCU Message Protocol
+
+maintainers:
+  - Dong Aisheng <aisheng.dong@nxp.com>
+
+description: i.MX SCU Client Device Node
+  Client nodes are maintained as children of the relevant IMX-SCU device node.
+
+allOf:
+  - $ref: watchdog.yaml#
+
+properties:
+  compatible:
+    items:
+      - const: fsl,imx8qxp-sc-wdt
+      - const: fsl,imx-sc-wdt
+
+required:
+  - compatible
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    watchdog {
+        compatible = "fsl,imx8qxp-sc-wdt", "fsl,imx-sc-wdt";
+        timeout-sec = <60>;
+    };