linux-kernel - Re: [PATCH 2/2] ARM: dts: am335x-icev2: Add nodes for gpio-decoder

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Date:	Fri, 12 Aug 2016 14:00:31 -0500
From:	Rob Herring <robh@...nel.org>
To:	Vignesh R <vigneshr@...com>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Mark Rutland <mark.rutland@....com>,
	Tony Lindgren <tony@...mide.com>,
	Russell King <linux@...linux.org.uk>,
	Arnd Bergmann <arnd@...db.de>,
	John Stultz <john.stultz@...aro.org>,
	S Twiss <stwiss.opensource@...semi.com>,
	Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@...aro.org>,
	Moritz Fischer <moritz.fischer@...us.com>,
	Daniel Hung-yu Wu <hywu@...gle.com>,
	Grant Grundler <grundler@...omium.org>,
	linux-input@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] ARM: dts: am335x-icev2: Add nodes for gpio-decoder

On Fri, Aug 12, 2016 at 10:22:29AM +0530, Vignesh R wrote:
> AM335x ICE board has a rotary-switch connected to PCA9536 I2C GPIO
> expander. The position of the rotary-switch is reflected by status of
> GPIO lines. Add gpio-decoder node to read these GPIO line status via
> gpio-decoder driver and report it as an input event to the system.
> 
> Signed-off-by: Vignesh R <vigneshr@...com>
> ---
>  arch/arm/boot/dts/am335x-icev2.dts | 9 +++++++++
>  1 file changed, 9 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/am335x-icev2.dts b/arch/arm/boot/dts/am335x-icev2.dts
> index 7d8b8fefdf08..f2de594343f2 100644
> --- a/arch/arm/boot/dts/am335x-icev2.dts
> +++ b/arch/arm/boot/dts/am335x-icev2.dts
> @@ -139,6 +139,15 @@
>  			default-state = "off";
>  		};
>  	};
> +	gpio-decoder0 {

Drop the 0 here.

> +		compatible = "gpio-decoder";
> +		gpios = <&pca9536 3 GPIO_ACTIVE_HIGH>,
> +			<&pca9536 2 GPIO_ACTIVE_HIGH>,
> +			<&pca9536 1 GPIO_ACTIVE_HIGH>,
> +			<&pca9536 0 GPIO_ACTIVE_HIGH>;
> +		linux,axis = <0>; /* ABS_X */
> +		gpio-decoder,max-value = <9>;
> +	};
>  };
>  
>  &am33xx_pinmux {
> -- 
> 2.9.2
>