[PATCH v6 3/5] dt-bindings: watchdog: add new binding for meson secure watchdog

[Xingyu Chen]

The binding targets the Meson-A/C series compatible SoCs, in which the
watchdog registers are in secure world.

Signed-off-by: Xingyu Chen <xingyu.chen@xxxxxxxxxxx>
---
 .../bindings/watchdog/amlogic,meson-sec-wdt.yaml   | 40 ++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml

diff --git a/Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml b/Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml
new file mode 100644
index 00000000..8e9d62a
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/amlogic,meson-sec-wdt.yaml
@@ -0,0 +1,40 @@
+# SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+# Copyright (c) 2019 Amlogic, Inc
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/power/amlogic,meson-sec-wdt.yaml#";
+$schema: "http://devicetree.org/meta-schemas/core.yaml#";
+
+title: Amlogic Meson Secure Watchdog Timer
+
+maintainers:
+  - Xingyu Chen <xingyu.chen@xxxxxxxxxxx>
+
+description: |+
+  Secure Watchdog Timer used in Meson-A/C series Compatible SoCs,
+  and its device node must be the child node of secure-monitor.
+
+properties:
+  compatible:
+    enum:
+      - amlogic,meson-sec-wdt
+
+  timeout-sec:
+    minimum: 1
+    maximum: 65
+    description:
+      Watchdog timeout values (in seconds)
+
+required:
+  - compatible
+
+examples:
+  - |
+    secure-monitor {
+        compatible = "amlogic,meson-gxbb-sm";
+
+        watchdog {
+            compatible = "amlogic,meson-sec-wdt";
+            timeout-sec = <60>;
+        };
+    };
-- 
2.7.4