linux-kernel - Re: [PATCH] arm64: dts: mt7622: fix BPI-R64 WPS button

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Date:   Thu, 7 Jul 2022 16:45:26 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Nick Hainke <vincent@...temli.org>,
        linux-mediatek@...ts.infradead.org
Cc:     INAGAKI Hiroshi <musashino.open@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Ryder Lee <ryder.lee@...iatek.com>, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] arm64: dts: mt7622: fix BPI-R64 WPS button



On 30/06/2022 13:16, Nick Hainke wrote:
> The bananapi R64 (BPI-R64) experiences wrong WPS button signals.
> In OpenWrt pushing the WPS button while powering on the device will set
> it to recovery mode. Currently, this also happens without any user
> interaction. In particular, the wrong signals appear while booting the
> device or restarting it, e.g. after doing a system upgrade. If the
> device is in recovery mode the user needs to manually power cycle or
> restart it.
> 
> The official BPI-R64 sources set the WPS button to GPIO_ACTIVE_LOW in
> the device tree. This setting seems to suppress the unwanted WPS button
> press signals. So this commit changes the button from GPIO_ACTIVE_HIGH to
> GPIO_ACTIVE_LOW.
> 
> The official BPI-R64 sources can be found on
> https://github.com/BPI-SINOVOIP/BPI-R64-openwrt
> 
> Fixes: 0b6286dd96c0 ("arm64: dts: mt7622: add bananapi BPI-R64 board")
> 
> Suggested-by: INAGAKI Hiroshi <musashino.open@...il.com>
> Signed-off-by: Nick Hainke <vincent@...temli.org>

Applied, thanks!

> ---
>   arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
> index 2b9bf8dd14ec..7538918c7a82 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
> +++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
> @@ -49,7 +49,7 @@ factory {
>   		wps {
>   			label = "wps";
>   			linux,code = <KEY_WPS_BUTTON>;
> -			gpios = <&pio 102 GPIO_ACTIVE_HIGH>;
> +			gpios = <&pio 102 GPIO_ACTIVE_LOW>;
>   		};
>   	};
>