From 5c24a28b4eb842ad1256496be6ae01bab15f1dcb Mon Sep 17 00:00:00 2001 From: Evan Benn Date: Tue, 5 May 2020 13:13:30 +1000 Subject: [PATCH] dt-bindings: watchdog: Add ARM smc wdt for mt8173 watchdog 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 Reviewed-by: Rob Herring Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20200505131242.v6.1.Id96574f1f52479d7a2f3b866b8a0552ab8c03d7f@changeid Signed-off-by: Guenter Roeck Signed-off-by: Wim Van Sebroeck --- .../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 + +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 50659d76976b7..7c062ef0ebb24 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1456,6 +1456,12 @@ S: Maintained F: Documentation/devicetree/bindings/interrupt-controller/arm,vic.txt F: drivers/irqchip/irq-vic.c +ARM SMC WATCHDOG DRIVER +M: Julius Werner +R: Evan Benn +S: Maintained +F: devicetree/bindings/watchdog/arm-smc-wdt.yaml + ARM SMMU DRIVERS M: Will Deacon R: Robin Murphy -- 2.39.5