On 5/4/20 8:13 PM, Evan Benn wrote: > 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> > Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx> > --- > > 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 <jwerner@xxxxxxxxxxxx> > + > +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 <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> >
