linux-kernel - Re: [linux-sunxi] [PATCH] [V2] ARM: dts: sun7i: Add dts file for Bananapi M1 Plus board

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Date:	Wed, 15 Jun 2016 22:52:23 +0200
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
Cc:	Bernhard Nortmann <bernhard.nortmann@....de>,
	Julian Calaby <julian.calaby@...il.com>,
	罗翼 <luoyi.ly@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Russell King <linux@....linux.org.uk>,
	devicetree <devicetree@...r.kernel.org>,
	"Mailing List, Arm" <linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] [PATCH] [V2] ARM: dts: sun7i: Add dts file for
 Bananapi M1 Plus board

Hi Chen-Yu,

On Mon, Jun 13, 2016 at 11:01:53AM +0800, Chen-Yu Tsai wrote:
> On Fri, Jun 10, 2016 at 5:38 PM, Maxime Ripard
> <maxime.ripard@...e-electrons.com> wrote:
> > On Thu, Jun 02, 2016 at 11:15:55AM +0200, Bernhard Nortmann wrote:
> >> Am 02.06.2016 um 10:16 schrieb Maxime Ripard:
> >> >[...]
> >> >Yes, everything that is shared with the banana-pro (which, judging
> >> >from Bernhard, is pretty much everything but a GPIO) should be merged
> >> >in the banapro DT.
> >> >
> >> >Maxime
> >> >
> >>
> >> Don't take my word for granted, as I do not own this hardware or know it
> >> particularly well. There is no doubt that "BPi-M1+" and "Banana Pro" are
> >> very similar, but if in doubt the information form the wiki should be
> >> verified.
> >
> > Hmmmm, ok. Chen-Yu, any input on this? You know the banana-pis much
> > more than I do.
> 
> I did a comparison of the "Banana Pro" vs the "BPi-M1+".
> 
> The differences are similar to what we have with any other development
> board, say the Cubietruck:
> 
>   - A different WiFi chip is used, and the BT part is not hooked up.
>   - Different GPIOs for external power regulator/switches
>   - Different GPIOs for LEDs
>   - Different peripherals exposed on the headers.
> 
> IMO There's no need to merge or have a common .dtsi for the two boards.

Ok.

> They (and all the other development boards) look similar because
> everyone is following the basic set by Allwinner's reference design,
> like which MMC controller and pins are used for SD/MMC, which ones
> are used for SDIO-based WiFi, and so on.
> 
> I did a version completely from scratch using just the schematics:
> 
>   https://github.com/wens/linux/commits/bpi-m1-plus

So, what do you mean by that? Do you have some comments on that patch,
or should I merge it, and you'll post your additions on top of it?

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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