linux-kernel - Re: [PATCH v3 6/8] arm64: dts: rockchip: Add power key to GeekBox

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Date:	Fri, 11 Mar 2016 00:09:04 +0100
From:	Julien Chauveau <chauveau.julien@...il.com>
To:	Andreas Färber <afaerber@...e.de>
Cc:	"open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	Heiko Stuebner <heiko@...ech.de>,
	"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
	<devicetree@...r.kernel.org>,
	"moderated list:ARM64 PORT" <linux-arm-kernel@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 6/8] arm64: dts: rockchip: Add power key to GeekBox


> Le 6 mars 2016 à 20:53, Andreas Färber <afaerber@...e.de> a écrit :
> 
> Signed-off-by: Andreas Färber <afaerber@...e.de>
> ---
> v2 -> v3:
> * Adopted wakeup-source instead of gpio-key,wakeup (Julien)
> * Dropped gpio-keys #address-cells and #size-cells properties (Julien)
> * Dropped power button reg property (Julien)
> * Adopted KEY_POWER (Julien)
> * Fixed power button pinctrl pull setting (Julien)
> 
> v2: New
> 
> arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts b/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts
> index 098be3700a6f..7036b49c9206 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3368-geekbox.dts
> @@ -42,6 +42,7 @@
> 
> /dts-v1/;
> #include "rk3368.dtsi"
> +#include <dt-bindings/input/input.h>
> 
> / {
> 	model = "GeekBox";
> @@ -70,6 +71,19 @@
> 		pinctrl-0 = <&ir_int>;
> 	};
> 
> +	keys: gpio-keys {

I think you don't need the "keys" label, because there’s no phandle that refers to this.

> +		compatible = "gpio-keys";
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&pwr_key>;
> +
> +		button@0 {

Here you should use "power" instead of "button@0".

> +			gpios = <&gpio0 2 GPIO_ACTIVE_LOW>;
> +			label = "GPIO Power";
> +			linux,code = <KEY_POWER>;

According to Documentation/input/event-codes.txt, there’s a special event type for the power button.
Should we use it here for that purpose?

			linux,input-type = <EV_PWR>

> +			wakeup-source;
> +		};
> +	};
> +
> 	leds: gpio-leds {
> 		compatible = "gpio-leds";
> 
> @@ -265,6 +279,12 @@
> 		};
> 	};
> 
> +	keys {
> +		pwr_key: pwr-key {
> +			rockchip,pins = <0 2 RK_FUNC_GPIO &pcfg_pull_none>;
> +		};
> +	};
> +
> 	pmic {
> 		pmic_sleep: pmic-sleep {
> 			rockchip,pins = <0 0 RK_FUNC_2 &pcfg_pull_none>;
> -- 
> 2.6.2
>