linux-kernel - Re: [PATCH 1/4] ARM: ux540: Add ccu8540-uib-v3 Device Tree Machine

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Date:	Thu, 30 May 2013 15:20:55 +0200
From:	Gabriel Fernandez <gabriel.fernandez.st@...il.com>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-kernel@...r.kernel.org,
	Linus Walleij <linus.walleij@...aro.org>,
	Olivier Clergeaud <olivier.clergeaud@...com>,
	Gabriel Fernandez <gabriel.fernandez@...com>
Subject: Re: [PATCH 1/4] ARM: ux540: Add ccu8540-uib-v3 Device Tree Machine

On 29 May 2013 17:50, Lee Jones <lee.jones@...aro.org> wrote:
> On Wed, 29 May 2013, Gabriel Fernandez wrote:
>
>> From: Gabriel Fernandez <gabriel.fernandez@...com>
>>
>> This board includes the U8540 platform and specifies only the
>> ST-Ericsson UIB version 3.
>
> I'm confused by this.
>
> Is it a new board, or just a UIB?

For me it's a new board.

ccu8540.dts is a board without uib.
You can can plug on this board some different uibs.
That's why, i created a ccu8540-uib-v3.dts board in which i included a
common board ccu8540.dts

Another solution is to create one *.dtsi file with all uibs for
ccu8540 and makes a dynamique detection.
Linus, Lee  what do you think about that ?

>
>> ---
>>  arch/arm/boot/dts/Makefile           |  1 +
>>  arch/arm/boot/dts/ccu8540-uib-v3.dts | 16 ++++++++++++++++
>>  2 files changed, 17 insertions(+)
>>  create mode 100644 arch/arm/boot/dts/ccu8540-uib-v3.dts
>>
>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>> index 1995988..29cb5db 100644
>> --- a/arch/arm/boot/dts/Makefile
>> +++ b/arch/arm/boot/dts/Makefile
>> @@ -159,6 +159,7 @@ dtb-$(CONFIG_ARCH_U8500) += snowball.dtb \
>>       hrefprev60.dtb \
>>       hrefv60plus.dtb \
>>       ccu8540.dtb \
>> +     ccu8540-uib-v3.dtb      \
>>       ccu9540.dtb
>>  dtb-$(CONFIG_ARCH_SHMOBILE) += emev2-kzm9d.dtb \
>>       r8a7740-armadillo800eva.dtb \
>> diff --git a/arch/arm/boot/dts/ccu8540-uib-v3.dts b/arch/arm/boot/dts/ccu8540-uib-v3.dts
>> new file mode 100644
>> index 0000000..4b4982e
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/ccu8540-uib-v3.dts
>
> If this is a UIB, it should be an include file (*.dtsi).
>
>> @@ -0,0 +1,16 @@
>> +/*
>> + * Copyright 2012 ST-Ericsson AB
>> + *
>> + * The code contained herein is licensed under the GNU General Public
>> + * License. You may obtain a copy of the GNU General Public License
>> + * Version 2 or later at the following locations:
>> + *
>> + * http://www.opensource.org/licenses/gpl-license.html
>> + * http://www.gnu.org/copyleft/gpl.html
>> + */
>> +
>> +#include "ccu8540.dts"
>
> No, the other way round.
>
> ccu8540.dts should include this one.
>
>> +/ {
>> +     model = "ST-Ericsson U8540 platform with device tree UIB v3";
>> +};
>
> This patch doesn't actually do anything.
>
> Fix it up, so it at least as some functionality.
>
> --
> Lee Jones
> Linaro ST-Ericsson Landing Team Lead
> Linaro.org │ Open source software for ARM SoCs
> Follow Linaro: Facebook | Twitter | Blog
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