linux-kernel - Re: [PATCH 1/2] arm: dts: Add support for National Instruments Project Sulfur SDRs

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Message-ID: <dfb517fe-8584-2a1a-22e5-946980cc9644@balister.org>
Date:   Tue, 26 Sep 2017 13:58:38 -0400
From:   Philip Balister <philip@...ister.org>
To:     Moritz Fischer <mdf@...nel.org>,
        Michal Simek <michal.simek@...inx.com>
Cc:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        robh+dt@...nel.org, mark.rutland@....com, linux@...linux.org.uk,
        gregkh@...uxfoundation.org, davem@...emloft.net,
        linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH 1/2] arm: dts: Add support for National Instruments
 Project Sulfur SDRs

On 09/26/2017 01:50 PM, Moritz Fischer wrote:
> Michal,
> 
> On Tue, Sep 26, 2017 at 02:54:48PM +0200, Michal Simek wrote:
>> Hi,
>>
>> On 25.9.2017 18:11, Moritz Fischer wrote:
>>> Hi Michal,
>>>
>>> On Mon, Sep 25, 2017 at 10:19:44AM +0200, Michal Simek wrote:
>>>> Hi Moritz
>>>>
>>>> sorry for delay.
>>>
>>> No problem.
>>>
>>>>
>>>> On 12.9.2017 01:22, Moritz Fischer wrote:
>>>>> Add support for the National Instruments Project Sulfur SDR
>>>>> motherboards Rev 2,3 and 4.
>>>>>
>>>>> Signed-off-by: Moritz Fischer <mdf@...nel.org>
>>>>> ---
>>>>>  arch/arm/boot/dts/Makefile                |   3 +
>>>>>  arch/arm/boot/dts/zynq-ni-sulfur-rev2.dts |  84 +++++++++++++++++++
>>>>>  arch/arm/boot/dts/zynq-ni-sulfur-rev3.dts | 118 ++++++++++++++++++++++++++
>>>>>  arch/arm/boot/dts/zynq-ni-sulfur-rev4.dts |  26 ++++++
>>>>>  arch/arm/boot/dts/zynq-ni-sulfur.dtsi     | 133 ++++++++++++++++++++++++++++++
>>>>>  5 files changed, 364 insertions(+)
>>>>>  create mode 100644 arch/arm/boot/dts/zynq-ni-sulfur-rev2.dts
>>>>>  create mode 100644 arch/arm/boot/dts/zynq-ni-sulfur-rev3.dts
>>>>>  create mode 100644 arch/arm/boot/dts/zynq-ni-sulfur-rev4.dts
>>>>>  create mode 100644 arch/arm/boot/dts/zynq-ni-sulfur.dtsi
>>>>
>>>> Is this publicly available board?
>>>
>>> Will be in Q1 2018 was announced at GRCon'17 ([1]).
>>> Some of the Rev3s are currently deployed in Norway as part of a radar
>>> system.
>>>
>>>> I am not quite sure we should apply these dts files. There are a lot of
>>>> boards with zynq and there must be any strong argument for applying this
>>>> to the tree. For arm32 with even flat tree structure.
>>>
>>> What's the issue with merging them, except for having 3 more files? 
>>
>> For me this is not a problem because on Linux side it is not increasing
>> build time.
>> I want to see the value for community. All xilinx platforms are
>> evaluation generic purpose boards which are showing how to connect stuff
>> together.
>> On the other hand this is real product.
> 
> Uh.
> 
>> I would let arm-soc maintainer to decide if this is fine or not. I
>> definitely don't want to end up in situation that we will have dts for
>> real products which are not bringing any value for others.
> 
> Sure, it's the maintainers call.
> 
> I do intend to have my customers run mainline on it eventually, currently
> I'm a handful of patches away from making that happen. So yes, running
> mainline is a usecase that matters to me.
> 
> It is one thing to keep bitching about vendor kernels as a community
> continuously, but then if someone goes through the effort and actually
> tries to run mainline, you give them crap like that above.
> 
> Our products usually come with full schematics [1], firmware, fpga code and all
> available, I don't know what makes them less useful to the community as a
> platform to experiment and develop on than Xilinx eval boards.
> 
> There's several people that I know of both hobbyists and companies that
> build systems around these platforms, so I don't know ...

I expect this product to be delivered with full source and a mainline
kernel, so lets make it easy for Moritz to do the right thing here. This
makes long term support of this product much easier.

Acked-by: Philip Balister <philip@...nsdr.com>

Philip

> 
> - Moritz
> 
> [1] http://files.ettus.com/schematics/
> 



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