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Commit e654f191 authored by Andrew Jeffery's avatar Andrew Jeffery Committed by Wim Van Sebroeck
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dt-bindings: watchdog: aspeed: External reset signal properties 



For the AST2500 and compatible watchdog controllers the external reset
signal can be configured for push-pull or open-drain drive types, and in
the case of push-pull driving, active low or high.

Signed-off-by: default avatarAndrew Jeffery <andrew@aj.id.au>
Acked-by: default avatarRob Herring <robh@kernel.org>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent ffbb29d6

Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt

+9 −1
Original line number Diff line number Diff line
@@ -33,10 +33,18 @@ Optional properties: 
        - none: No reset is performed on timeout. Assumes another watchdog

                engine is responsible for this.



 - aspeed,alt-boot:    If property is present then boot from alternate block.

 - aspeed,external-signal: If property is present then signal is sent to

			external reset counter (only WDT1 and WDT2). If not

			specified no external signal is sent.

 - aspeed,alt-boot:    If property is present then boot from alternate block.

 - aspeed,ext-pulse-duration: External signal pulse duration in microseconds



Optional properties for AST2500-compatible watchdogs:

 - aspeed,ext-push-pull: If aspeed,external-signal is present, set the pin's

			 drive type to push-pull. The default is open-drain.

 - aspeed,ext-active-high: If aspeed,external-signal is present and and the pin

			   is configured as push-pull, then set the pulse

			   polarity to active-high. The default is active-low.



Example: