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Subject[PATCH v2 1/2] dt-bindings: watchdog: Add ARM smc wdt for mt8173 watchdog
Date
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@chromium.org>

---

Changes in v4:
- Add arm,smc-id property

Changes in v3:
- Change name back to arm

Changes in v2:
- Change name arm > mt8173

.../bindings/watchdog/arm-smc-wdt.yaml | 36 +++++++++++++++++++
MAINTAINERS | 6 ++++
2 files changed, 42 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 0000000000000..5379d9f798d84
--- /dev/null
+++ b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml
@@ -0,0 +1,36 @@
+# 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@chromium.org>
+
+properties:
+ compatible:
+ enum:
+ - mediatek,mt8173-smc-wdt
+ arm,smc-id:
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32
+ - default: 0x82003D06
+ description:
+ The ATF smc function id used by the firmware.
+
+required:
+ - compatible
+
+examples:
+ - |
+ watchdog {
+ compatible = "mediatek,mt8173-smc-wdt";
+ timeout-sec = <15>;
+ };
+
+...
diff --git a/MAINTAINERS b/MAINTAINERS
index b816a453b10eb..0f2b39767bfa9 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1457,6 +1457,12 @@ S: Maintained
F: Documentation/devicetree/bindings/interrupt-controller/arm,vic.txt
F: drivers/irqchip/irq-vic.c

+ARM SMC WATCHDOG DRIVER
+M: Julius Werner <jwerner@chromium.org>
+R: Evan Benn <evanbenn@chromium.org>
+S: Maintained
+F: devicetree/bindings/watchdog/arm-smc-wdt.yaml
+
ARM SMMU DRIVERS
M: Will Deacon <will@kernel.org>
R: Robin Murphy <robin.murphy@arm.com>
--
2.26.1.301.g55bc3eb7cb9-goog
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