[PATCH 1/2] dt-bindings: watchdog: Add arm,smc-wdt watchdog arm,smc-wdt compatible

[Evan Benn]

This watchdog can be used on ARM systems with a Secure
Monitor firmware to forward watchdog operations to
firmware via a Secure Monitor Call.

Signed-off-by: Evan Benn <evanbenn@xxxxxxxxxxxx>
---

 .../bindings/watchdog/arm,smc-wdt.yaml        | 30 +++++++++++++++++++
 MAINTAINERS                                   |  6 ++++
 2 files changed, 36 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/watchdog/arm,smc-wdt.yaml

diff --git a/Documentation/devicetree/bindings/watchdog/arm,smc-wdt.yaml b/Documentation/devicetree/bindings/watchdog/arm,smc-wdt.yaml
new file mode 100644
index 000000000000..5170225b0c98
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/arm,smc-wdt.yaml
@@ -0,0 +1,30 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/watchdog/arm,smc-wdt.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARM Secure Monitor Call based watchdog
+
+allOf:
+  - $ref: "watchdog.yaml#"
+
+maintainers:
+  - Julius Werner <jwerner@xxxxxxxxxxxx>
+
+properties:
+  compatible:
+    enum:
+      - arm,smc-wdt
+
+required:
+  - compatible
+
+examples:
+  - |
+    watchdog {
+      compatible = "arm,smc-wdt";
+      timeout-sec = <15>;
+    };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index e48ab79879ac..5c45536e1177 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1421,6 +1421,12 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/interrupt-controller/amazon,al-fic.txt
 F:	drivers/irqchip/irq-al-fic.c
 
+ARM SMC WATCHDOG DRIVER
+M:	Julius Werner <jwerner@xxxxxxxxxxxx>
+R:	Evan Benn <evanbenn@xxxxxxxxxxxx>
+S:	Maintained
+F:	devicetree/bindings/watchdog/arm,smc-wdt.yaml
+
 ARM SMMU DRIVERS
 M:	Will Deacon <will@xxxxxxxxxx>
 R:	Robin Murphy <robin.murphy@xxxxxxx>
-- 
2.25.0.265.gbab2e86ba0-goog