linux-kernel - Re: [PATCH 2/2] arm: dts: sun8i: reuse the uart1 node of iNet D978 rev2 board

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Date:   Fri, 9 Dec 2016 09:11:03 +0100
From:   Maxime Ripard <maxime.ripard@...e-electrons.com>
To:     Icenowy Zheng <icenowy@...c.xyz>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...glegroups.com,
        devicetree@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>
Subject: Re: [PATCH 2/2] arm: dts: sun8i: reuse the uart1 node of iNet D978
 rev2 board

On Mon, Dec 05, 2016 at 05:03:35PM +0800, Icenowy Zheng wrote:
> 
> 2016年12月5日 16:50于 Maxime Ripard <maxime.ripard@...e-electrons.com>写道：
> >
> > On Fri, Dec 02, 2016 at 11:19:13PM +0800, Icenowy Zheng wrote: 
> > > As a uart1 node is added into sun8i-reference-design-tablet.dtsi, simply 
> > > use it in iNet D978 rev2 device tree. 
> > > 
> > > Signed-off-by: Icenowy Zheng <icenowy@...c.xyz> 
> >
> > I'd like to see more consolidation before that change is needed. If we 
> > find more boards using that, it will make sense, but for a single 
> > board it's not worth it. 
> 
> At least 2~3 Q8 A33 tablets in #linux-sunxi are found to have
> rtl8703as, which contains UART bluetooth. (including mine)

Still, I'm not fond of creating a default on such a low count sample
of (out-of-tree) DTs. Support and enable the bluetooth on more boards,
and then consolidate.

> In fact, what I want to do is to get the node ready-to-be-okay in Q8
> dts, so it can be enabled by either u-boot command or (theortically)
> Hans de Goede's q8-hardwaremgr, just like what is done at
> touchscreen node.

If your plan is to enable all the combinations possible accross the Q8
tablets and let the bootloader/user figure it all out, then it's not
going to happen, sorry.

Maxime

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

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