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dt-bindings: rtc: add reset-source property 

Some RTCs, e.g. the pcf2127, can be used as a hardware watchdog. But
if the reset pin is not actually wired up, the driver exposes a
watchdog device that doesn't actually work.

Provide a standard binding that can be used to indicate that a given
RTC can perform a reset of the machine, similar to wakeup-source.

Suggested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201218101054.25416-2-rasmus.villemoes@prevas.dk
This commit is contained in:
Rasmus Villemoes 2020-12-18 11:10:53 +01:00 committed by Alexandre Belloni
parent f70cc33029
commit 320d159e2d
1 changed files with 5 additions and 0 deletions
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5
Documentation/devicetree/bindings/rtc/rtc.yaml
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@ -63,6 +63,11 @@ properties:
description:
Enables wake up of host system on alarm.
reset-source:
$ref: /schemas/types.yaml#/definitions/flag
description:
The RTC is able to reset the machine.
additionalProperties: true
...