linux-kernel - Re: [PATCH v3 4/5] ARM: dts: vf610: use new GPIO support

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Message-ID: <20140926012126.GC21077@dragon>
Date:	Fri, 26 Sep 2014 09:21:27 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Stefan Agner <stefan@...er.ch>
CC:	<linus.walleij@...aro.org>, <gnurou@...il.com>,
	<kernel@...gutronix.de>, <linux-gpio@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <bpringlemeir@...ps.com>,
	<l.stach@...gutronix.de>
Subject: Re: [PATCH v3 4/5] ARM: dts: vf610: use new GPIO support

On Thu, Sep 25, 2014 at 06:37:08PM +0200, Stefan Agner wrote:
> Use GPIO support by adding SD card detection configuration and
> GPIO pinmux for Colibri's standard GPIO pins. Attach the GPIO
> pins to the iomuxc node to get the GPIO pin settings applied.
> 
> Signed-off-by: Stefan Agner <stefan@...er.ch>
> ---
>  arch/arm/boot/dts/vf610-colibri.dtsi | 9 +++++++++
>  arch/arm/boot/dts/vf610-twr.dts      | 1 +
>  arch/arm/boot/dts/vf610.dtsi         | 1 +
>  3 files changed, 11 insertions(+)
> 
> diff --git a/arch/arm/boot/dts/vf610-colibri.dtsi b/arch/arm/boot/dts/vf610-colibri.dtsi
> index 0cd8343..efd4322 100644
> --- a/arch/arm/boot/dts/vf610-colibri.dtsi
> +++ b/arch/arm/boot/dts/vf610-colibri.dtsi
> @@ -31,6 +31,7 @@
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_esdhc1>;
>  	bus-width = <4>;
> +	cd-gpios = <&gpio2 10 GPIO_ACTIVE_LOW>;
>  };
>  
>  &fec1 {
> @@ -71,6 +72,14 @@
>  
>  &iomuxc {
>  	vf610-colibri {
> +		pinctrl_gpio_ext: gpio_ext {
> +			fsl,pins = <
> +				VF610_PAD_PTD10__GPIO_89	0x22ed /* EXT_IO_0 */
> +				VF610_PAD_PTD9__GPIO_88		0x22ed /* EXT_IO_1 */
> +				VF610_PAD_PTD26__GPIO_68	0x22ed /* EXT_IO_2 */
> +			>;
> +		};
> +

I'm not sure these GPIOs will be set up at anywhere.  To set them up,
you need to either have pinctrl_gpio_ext referenced by some client
device in its pinctrl-* property or put these pins into hog group (see
example in arch/arm/boot/dts/vf610-twr.dts).

Shawn

>  		pinctrl_esdhc1: esdhc1grp {
>  			fsl,pins = <
>  				VF610_PAD_PTA24__ESDHC1_CLK	0x31ef
> diff --git a/arch/arm/boot/dts/vf610-twr.dts b/arch/arm/boot/dts/vf610-twr.dts
> index 189b697..3fe8a8f 100644
> --- a/arch/arm/boot/dts/vf610-twr.dts
> +++ b/arch/arm/boot/dts/vf610-twr.dts
> @@ -116,6 +116,7 @@
>  	pinctrl-names = "default";
>  	pinctrl-0 = <&pinctrl_esdhc1>;
>  	bus-width = <4>;
> +	cd-gpios = <&gpio5 6 GPIO_ACTIVE_LOW>;
>  	status = "okay";
>  };
>  
> diff --git a/arch/arm/boot/dts/vf610.dtsi b/arch/arm/boot/dts/vf610.dtsi
> index 4d2ec32..467c97e 100644
> --- a/arch/arm/boot/dts/vf610.dtsi
> +++ b/arch/arm/boot/dts/vf610.dtsi
> @@ -11,6 +11,7 @@
>  #include "vf610-pinfunc.h"
>  #include <dt-bindings/clock/vf610-clock.h>
>  #include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/gpio/gpio.h>
>  
>  / {
>  	aliases {
> -- 
> 2.1.0
> 
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