linux-kernel - Re: [PATCH v5] ARM:dts:omap4-panda: Update the LED support for the panda DTS

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Date:	Fri, 17 May 2013 08:34:18 -0500
From:	Nishanth Menon <nm@...com>
To:	Dan Murphy <dmurphy@...com>
CC:	<b-cousson@...com>, <tony@...mide.com>, <linux@....linux.org.uk>,
	<devicetree-discuss@...ts.ozlabs.org>,
	<linux-omap@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5] ARM:dts:omap4-panda: Update the LED support for the
 panda DTS

On 08:21-20130517, Dan Murphy wrote:
[...]
May be others with better DT experience can help here..
but here is a trick to reduce dts file changes:
> diff --git a/arch/arm/boot/dts/omap4-panda-es.dts b/arch/arm/boot/dts/omap4-panda-es.dts
> index f1d8c21..08d2e38 100644
> --- a/arch/arm/boot/dts/omap4-panda-es.dts
> +++ b/arch/arm/boot/dts/omap4-panda-es.dts
> @@ -34,3 +34,37 @@
>  		0x5e 0x100	/* hdmi_sda.hdmi_sda INPUT | MODE 0 */
>  		>;
>  };
> +
> +&omap4_pmx_core {
> +	led_gpio_pins: gpio_led_pmx {
> +		pinctrl-single,pins = <
> +			0xb6 0x3	/* gpio_110 OUTPUT | MODE 3 */
> +		>;
> +	};
> +};
> +
> +&led_wkgpio_pins {
> +	pinctrl-single,pins = <
> +		0x1c 0x3	/* gpio_wk8 OUTPUT | MODE 3 */
> +	>;
> +};
> +
> +&leds {
> +	compatible = "gpio-leds";
> +	pinctrl-names = "default";
Normally, override  will either add (if new param) OR replace (if same param)
	So the above two are superfluous.
> +	pinctrl-0 = <
> +		&led_gpio_pins
> +		&led_wkgpio_pins
> +	>;
These are needed
> +
> +	heartbeat {
> +		label = "pandaboard::status1";
can drop this
> +		gpios = <&gpio4 14 0>;
needed
> +		linux,default-trigger = "heartbeat";
can be dropped
> +	};
> +	mmc {
> +		label = "pandaboard::status2";
could be dropped
> +		gpios = <&gpio1 8 0>;
needed
> +		linux,default-trigger = "mmc0";
could be dropped.

-- 
Regards,
Nishanth Menon
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