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 <evanb...@chromium.org> --- Changes in v6: - Don't use dt default Changes in v5: - Change compatible to arm,smc-wdt 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 | 37 +++++++++++++++++++ MAINTAINERS | 6 +++ 2 files changed, 43 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..bec651541e0c8 --- /dev/null +++ b/Documentation/devicetree/bindings/watchdog/arm-smc-wdt.yaml @@ -0,0 +1,37 @@ +# 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 <jwer...@chromium.org> + +properties: + compatible: + enum: + - arm,smc-wdt + arm,smc-id: + allOf: + - $ref: /schemas/types.yaml#/definitions/uint32 + description: | + The ATF smc function id used by the firmware. + Defaults to 0x82003D06 if unset. + +required: + - compatible + +examples: + - | + watchdog { + compatible = "arm,smc-wdt"; + arm,smc-id = <0x82003D06>; + 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 <jwer...@chromium.org> +R: Evan Benn <evanb...@chromium.org> +S: Maintained +F: devicetree/bindings/watchdog/arm-smc-wdt.yaml + ARM SMMU DRIVERS M: Will Deacon <w...@kernel.org> R: Robin Murphy <robin.mur...@arm.com> -- 2.26.2.526.g744177e7f7-goog
