Commit e654f191 authored by Andrew Jeffery's avatar Andrew Jeffery Committed by Wim Van Sebroeck

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
......@@ -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:
......
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