linux-kernel - Re: [PATCH 3/3] ARM: dts: sunxi: enable SDIO Wi-Fi on Orange Pi Zero

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Date:   Wed, 30 Nov 2016 09:25:01 +0000
From:   Andre Przywara <andre.przywara@....com>
To:     Icenowy Zheng <icenowy@...c.xyz>,
        Alexey Kardashevskiy <aik@...abs.ru>
Cc:     Mark Rutland <mark.rutland@....com>,
        Vishnu Patekar <vishnupatekar0510@...il.com>,
        devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
        Hans de Goede <hdegoede@...hat.com>,
        Jonathan Corbet <corbet@....net>,
        Arnd Bergmann <arnd@...db.de>,
        Russell King <linux@...linux.org.uk>,
        Maxime Ripard <maxime.ripard@...e-electrons.com>,
        linux-arm-kernel@...ts.infradead.org,
        LKML <linux-kernel@...r.kernel.org>, Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH 3/3] ARM: dts: sunxi: enable SDIO Wi-Fi on Orange Pi Zero

Hi,

On 29/11/16 10:19, Icenowy Zheng wrote:
> 
> 2016年11月29日 15:16于 Alexey Kardashevskiy <aik@...abs.ru>写道：
>>
>>
>>
>> On Wed, Nov 23, 2016 at 6:59 PM, Maxime Ripard
> <maxime.ripard@...e-electrons.com> wrote:
>>>
>>> Hi,
>>>
>>> On Tue, Nov 22, 2016 at 12:24:21AM +0800, Icenowy Zheng wrote:
>>> > There's a Allwinner's XR819 SDIO Wi-Fi module soldered on the board of
>>> > Orange Pi Zero, which used a dedicated regulator to power.
>>> >
>>> > Add the device tree node of the regulator, the enable gpio (with
>>> > mmc-pwrseq) and the sdio controller.
>>> >
>>> > There's a out-of-tree driver tested to work with this device tree.
>>
>>
>> btw could you please give a pointer where to find a XR819 driver for
> relatively recent kernel (4.8 may be, just not 3.4)? Thanks.
> 
> https://github.com/Icenowy/xradio

I was just curious, so pulled your tree and tried to just compile it. It
still threw warnings at me for ARM, and even more so for arm64.
I fixed all of them and put that on my github[1]. Feel free to just pick
them from there or wait till I manage to clean them up and send you a
pull request.
And also just a a test, I quickly put it in drivers/net/wireless/xradio,
where it compiled fine after registering it with the upper level Kconfig
and Makefile.

And while looking at it: This looks like typical AW code, not even
remotely upstreameable and probably far too complicated. Enabling some
Kconfig options made it complain about missing functions.
Has anyone checked if this is close to an existing WiFi chip? That
wouldn't be a first ;-)

Cheers,
Andre.

[1] https://github.com/apritzel/xradio/commits/quickfixes