[PATCH linux dev-4.10 v3 2/4] dt-bindings: watchdog: aspeed: External reset signal properties

[Matt Spinler]

Tested-by: Matt Spinler mspinler at linux.vnet.ibm.com


On 7/27/2017 5:16 AM, Andrew Jeffery wrote:
> 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 open-drain driving, active low or high.
>
> Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
> ---
>   Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt | 10 +++++++++-
>   1 file changed, 9 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
> index f526b003b2e0..7aa885f620ef 100644
> --- a/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
> +++ b/Documentation/devicetree/bindings/watchdog/aspeed-wdt.txt
> @@ -36,10 +36,18 @@ Optional properties:
>    - aspeed,interrupt:	If property is present then interrupt CPU.
>   			If not specified then don't interrupt CPU.
>
> + - 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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