linux-kernel - Re: [PATCHv2] ARM:dts:omap4-panda:Update the LED support for the panda DTS

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Date:	Wed, 8 May 2013 16:47:46 -0700
From:	Tony Lindgren <tony@...mide.com>
To:	Dan Murphy <dmurphy@...com>
Cc:	Vincent Stehlé <v-stehle@...com>,
	b-cousson@...com, linux@....linux.org.uk,
	linux-omap@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCHv2] ARM:dts:omap4-panda:Update the LED support for the
 panda DTS

* Dan Murphy <dmurphy@...com> [130418 11:35]:
> On 04/18/2013 04:30 AM, Vincent Stehlé wrote:
> >On 04/17/2013 10:16 PM, Dan Murphy wrote:
> >>The GPIO for LED D1 on the omap4-panda a1-a3 rev and the omap4-panda-es
> >>are different.
> >(..)
> >>diff --git a/arch/arm/boot/dts/omap4-panda-common.dtsi b/arch/arm/boot/dts/omap4-panda-common.dtsi
> >>index 03bd60d..0c48f6b 100644
> >>--- a/arch/arm/boot/dts/omap4-panda-common.dtsi
> >>+++ b/arch/arm/boot/dts/omap4-panda-common.dtsi
> >(..)
> >>@@ -135,6 +136,25 @@
> >>  			0xf0 0x118     /* i2c4_sda PULLUP | INPUTENABLE | MODE0 */
> >>  		>;
> >>  	};
> >>+
> >>+	led_gpio_pins: pinmux_leds_pins {
> >>+		pinctrl-single,pins = <
> >>+		>;
> >>+	};
> >>+};
> >Hi,
> >
> >FYI, there was a recent discussion precisely on this topic, where Tomy
> >suggested to remove the empty section:
> >http://marc.info/?l=linux-omap&m=136546635409232&w=2
> >
> >Apart from that, I just tested your patch on top of Tomy's
> >omap-for-v3.10/dt branch and it is working fine for me on PandaBoards
> >EA3, A4 and ES.
> >
> >Tested-by: Vincent Stehlé <v-stehle@...com>
> >
> >Best regards,
> >
> >V.
> >
> Thanks for testing Vincent
> 
> Is there a way to append the data to an already existing node?
> I do not see a clean way.

If you have something in omap4-panda-common.dtsi and the same entry
in the omap4-panda-es.dts, the entries in omap4-panda-es.dts will
override and append the entries in omap4-panda-common.dtsi.

So I think you can avoid the empty entry that way.

Regards,

Tony
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