From: Rasmus Villemoes rasmus.villemoes@prevas.dk
commit 320d159e2d63a97a40f24cd6dfda5a57eec65b91 upstream.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- Documentation/devicetree/bindings/rtc/rtc.yaml | 5 +++++ 1 file changed, 5 insertions(+)
--- a/Documentation/devicetree/bindings/rtc/rtc.yaml +++ b/Documentation/devicetree/bindings/rtc/rtc.yaml @@ -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
...