linux-kernel - Re: [PATCH 04/11] arm64: Introduce Allwinner SoC config option

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Date:	Tue, 2 Feb 2016 15:30:48 +0000
From:	Andre Przywara <andre.przywara@....com>
To:	Matthias Brugger <matthias.bgg@...il.com>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Chen-Yu Tsai <wens@...e.org>, linux-sunxi@...glegroups.com
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will.deacon@....com>,
	linux-arm-kernel@...ts.infradead.org,
	Arnd Bergmann <arnd@...db.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/11] arm64: Introduce Allwinner SoC config option

Hi,

On 02/02/16 15:20, Matthias Brugger wrote:
> 
> 
> On 01/02/16 18:39, Andre Przywara wrote:
>> To prepare for the Allwinner A64 SoC support, introduce a config
>> option to allow compiling Allwinner (aka. sunxi) specific drivers
>> for the arm64 architecture as well.
>> This patch just defines the ARCH_SUNXI symbol to allow Allwinner
>> specific drivers to be selected during kernel configuration.
>> Since the MMC driver is quite essential for Linux to be useful, select
>> it by default.
>>
> 
> This mostly depends on the board you have. The rootfs could be on the
> flash, on nfs or even on a usb stick.

Yeah, could be. It's just that all boards I know of so far have either
SD card or eMMC.
Maybe it's better put in defconfig. I just want to avoid people getting
disappointed when enabling Allwinner support and not being able to use
it properly. You know that arm64 has only _one_ defconfig to rule them
all, so compiling a special kernel with magic config options is not the
usual drill for arm64 - for good reasons.

> I don't see why MMC support should be essential for A64 SoC.

So I guess I put it in defconfig then, together with the patch to
actually enable Allwinner support by default, which I forgot in this series.

Cheers,
Andre.