[PATCH linux dev-4.10 v3 1/4] ARM: aspeed: Request WDTRST1 pinctrl function

[Matt Spinler]

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


On 7/27/2017 5:16 AM, Andrew Jeffery wrote:
> On Witherspoon, the Aspeed SoC's WDTRST1 pin is wired to the FAULT pin
> on the MAX31785 fan controller, which drives the fans to 100% PWM duty
> when asserted. The pulse generated by the watchdog is latched to ensure
> the fans stay at full speed across the BMC reboot. The latch is reset
> when the BMC transitions through the chassis-poweron systemd target.
>
> The SoC's WDTRST1 pinctrl function needs to be requested for
> aspeed,external-signal to be effective, otherwise the pin is not
> associated with the watchdog controller.
>
> Signed-off-by: Andrew Jeffery <andrew at aj.id.au>
> Cc: Matt Spinler <mspinler at linux.vnet.ibm.com>
> ---
>   arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts | 3 +++
>   1 file changed, 3 insertions(+)
>
> diff --git a/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts b/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts
> index d9649013ee78..c28222c17d03 100644
> --- a/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts
> +++ b/arch/arm/boot/dts/aspeed-bmc-opp-witherspoon.dts
> @@ -488,6 +488,9 @@
>   &wdt1 {
>   	aspeed,reset-type = "none";
>   	aspeed,external-signal;
> +
> +	pinctrl-names = "default";
> +	pinctrl-0 = <&pinctrl_wdtrst1_default>;
>   };
>
>   &wdt2 {

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ozlabs.org/pipermail/openbmc/attachments/20170731/23f3fdcc/attachment-0001.html>