linux-kernel - Re: [GIT PULL] at91: DT for 3.16 #2

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Message-ID: <537DB9D0.5010001@atmel.com>
Date:	Thu, 22 May 2014 10:48:16 +0200
From:	Nicolas Ferre <nicolas.ferre@...el.com>
To:	Olof Johansson <olof@...om.net>,
	Alexandre Belloni <alexandre.belloni@...e-electrons.com>
CC:	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Arnd Bergmann <arnd@...db.de>,
	"arm@...nel.org" <arm@...nel.org>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>,
	Wenyou Yang <wenyou.yang@...el.com>,
	"Ludovic Desroches" <ludovic.desroches@...el.com>
Subject: Re: [GIT PULL] at91: DT for 3.16 #2

On 21/05/2014 23:51, Olof Johansson :
> On Wed, May 21, 2014 at 2:42 PM, Alexandre Belloni
> <alexandre.belloni@...e-electrons.com> wrote:
>> Hi,
>>
>> On 21/05/2014 at 14:11:05 -0700, Olof Johansson wrote :
>>>> This directory is flat, the board names are chosen by companies and
>>>> people that we do not control, a user tend to like finding his preferred
>>>> board dtb file unchanged from a kernel revision to another...
>>>> Well all this lead me to think that we don't have to loose too much time
>>>> thinking about a new strict convention for this file naming or changing
>>>> all this once again just for the sake of it.
>>>>
>>>> Other SoC maintainers beautifully designed from the beginning the naming
>>>> scheme of their DT files, fine. AT91 did not and forgive me but when
>>>> opening arch/arm/boot/dts/Makefile file and seeing some file names, I'm
>>>> not ashamed. Moreover, now that I said to everybody since 3.10 to prefix
>>>> their *board* name with "at91-", I have to say something else, I don't
>>>> think it is worth it.
>>>
>>> I don't agree with everything above, but it's not worth arguing for the
>>> sake of arguing. :) I think we can tweak what you're doing now and get
>>> things to work well by merging new dts files with at91-<soc>-board.dts
>>> as the name. As mentioned, don't worry about the existing files. This
>>> shouldn't be a significiant change to what you've been telling people
>>> since 3.10 to cause much confusion.
>>>
>>
>> I'm not sure we should keep the at91 prefix. The sama5d3 series is not
>> at91.
> 
> *headdesk* It's part of mach-at91. For all intents and purposes, the label fits.

*double facepalm* Alexandre... always teasing ;-)

(found "double facepalm" while searching for headdesk in google image,
was fun...)

>> I would suggest using <soc>-<vendor>-<board> in the future, like what is
>> done for mvebu, berlin and some omap3 and freescale boards. I would
>> however make an exception for the evaluation kits and keep the current
>> "<soc>ek" name (else we would get sama5d3-atmel-sama5d3ek).
> 
> Nack on this as a hard rule. As long as there's a vendor or (large
> family) SoC prefix I don't care about the rest of the structure.
> Really, let's not waste time on it at this time.
> 
>> I also got confused by the at91- prefix when looking for a few dts files
>> but I think it is too late to rename now or maybe we could do it all at
>> once for a long term release (provided we know which one it will be).
>>
>> For reference, the list of files that would need renaming:
>> animeo_ip.dts
>> at91-ariag25.dts
>> at91-cosino.dtsi
>> at91-cosino_mega2560.dts
>> at91-foxg20.dts
>> at91-qil_a9260.dts
>> ethernut5.dts
>> ge863-pro3.dtsi
>> kizbox.dts
>> mpa1600.dts
>> pm9g45.dts
>> tny_a9260.dts
>> tny_a9263.dts
>> tny_a9g20.dts
>> usb_a9260.dts
>> usb_a9263.dts
>> usb_a9g20_common.dtsi
>> aks-cdu.dts
>> evk-pro3.dts
>> at91-sama5d3_xplained.dts
> 
> The DTS name is somewhat irritating in that installers and other
> environments (my own tester included) rely on file names. There's been
> a bunch of discussion about this in the past, but at the end of the
> day, you end up irritating people when you rename the resulting dtbs.
> 
> As long as we don't keep adding random names beyond those, we should be OK.

I okay with all you said Olof. I'll try to keep this file naming
sensible even with all the legacy that we already have.

Bye,
-- 
Nicolas Ferre
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