linux-kernel - Re: [linux-sunxi] Re: [PATCH 3/3] arm64: allwinner: dts: h6: add Wi-Fi support for Pine H64 model A/B

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Date:   Wed, 25 Jul 2018 14:19:47 +0200
From:   Maxime Ripard <maxime.ripard@...tlin.com>
To:     Icenowy Zheng <icenowy@...c.io>
Cc:     Chen-Yu Tsai <wens@...e.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        devicetree <devicetree@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-sunxi <linux-sunxi@...glegroups.com>
Subject: Re: [linux-sunxi] Re: [PATCH 3/3] arm64: allwinner: dts: h6: add
 Wi-Fi support for Pine H64 model A/B

On Tue, Jul 24, 2018 at 10:42:32PM +0800, Icenowy Zheng wrote:
> 
> 
> 于 2018年7月24日 GMT+08:00 下午10:41:51, Maxime Ripard <maxime.ripard@...tlin.com> 写到:
> >On Tue, Jul 24, 2018 at 10:37:51AM +0800, Chen-Yu Tsai wrote:
> >> On Tue, Jul 24, 2018 at 10:28 AM, Icenowy Zheng <icenowy@...c.io>
> >wrote:
> >> >
> >> >
> >> > 于 2018年7月24日 GMT+08:00 上午10:26:02, Chen-Yu Tsai <wens@...e.org> 写到:
> >> >>On Tue, Jul 24, 2018 at 10:23 AM, Icenowy Zheng <icenowy@...c.io>
> >> >>wrote:
> >> >>>
> >> >>>
> >> >>> 于 2018年7月24日 GMT+08:00 上午10:21:59, Chen-Yu Tsai <wens@...e.org>
> >写到:
> >> >>>>On Tue, Jul 24, 2018 at 9:15 AM, Icenowy Zheng <icenowy@...c.io>
> >> >>wrote:
> >> >>>>> The Pine H64 model A has a Wi-Fi module connector and the model
> >B
> >> >>has
> >> >>>>an
> >> >>>>> on-board RTL8723BS Wi-Fi module.
> >> >>>>>
> >> >>>>> Add support for them. For model A, as it's not defaultly
> >present,
> >> >>>>keep
> >> >>>>> it disabled now.
> >> >>>>
> >> >>>>Nope. Pine64 actually has two WiFi/BT modules. And they require
> >> >>>>different
> >> >>>>device tree snippets for both the WiFi and BT side. This is
> >better
> >> >>>>resolved
> >> >>>>with device tree overlays.
> >> >>>>
> >> >>>>I have both, though I've yet found time to work on them.
> >> >>>
> >> >>> I have also both.
> >> >>>
> >> >>> The skeleton here can get the Wi-Fi of both to work.
> >> >>
> >> >>Cool. Then I can put away my RTL module for now. :)
> >> >
> >> > P.S. SDIO is auto detectable, and for BCM chips, the OOB interrupt
> >> > is only a bonus function and it can fall back to standard in-band
> >> > interrupt (which doesn't need special binding, and is currently
> >> > used by mainline r8723bs driver.)
> >> 
> >> Correct. With BT you'll have serdev device nodes with different
> >> compatibles. Then you'll have to resort to overlays, and you'd
> >probably
> >> end up adding WiFi OOB interrupt bits as well.
> >> 
> >> So the question remaining is: should we enable the MMC part, along
> >> with power sequencing and regulator supplies, by default? Thinking
> >> more about it, I'm actually OK with it. The board connectors are
> >> clearly marked as being for a WiFi+BT module. The whole space on
> >> the board is surrounded by a box in silkscreen. Sorry for the
> >> initial nack.
> >> 
> >> Maxime, any thoughts?
> >
> >If there's a need for an overlay anyway, there's no real reason to
> >enable it by default, especially if not everything is there.
> 
> Everything is there, for model B support.

Except BT?

Maxime

-- 
Maxime Ripard, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com

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