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

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Date:	Thu, 9 May 2013 13:08:23 -0500
From:	Dan Murphy <dmurphy@...com>
To:	Tony Lindgren <tony@...mide.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

Tony
On 05/08/2013 06:47 PM, Tony Lindgren wrote:
> * 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
Thanks but the issue is the led entry would not appear in the common file so there is nothing to override.
Can we cleanly append to omap4_pmx_core without overriding the whole node?
I don't want to recreate the pmx_core node in the es file.

Dan

-- 
------------------
Dan Murphy

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