linux-kernel - Re: [PATCH 4/4] dt: binding: Add Qualcomm wcn36xx WiFi binding

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Message-ID: <20151229190357.GJ16437@tuxbot>
Date:	Tue, 29 Dec 2015 11:03:57 -0800
From:	Bjorn Andersson <bjorn@...o.se>
To:	Rob Herring <robh@...nel.org>
Cc:	Eugene Krasnikov <k.eugene.e@...il.com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kalle Valo <kvalo@...eaurora.org>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>, devicetree@...r.kernel.org,
	fengwei.yin@...aro.org, linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-wireless@...r.kernel.org,
	netdev@...r.kernel.org, wcn36xx@...ts.infradead.org
Subject: Re: [PATCH 4/4] dt: binding: Add Qualcomm wcn36xx WiFi binding

On Tue 29 Dec 10:34 PST 2015, Rob Herring wrote:

> On Sun, Dec 27, 2015 at 05:34:27PM -0800, Bjorn Andersson wrote:
> > Add binding representing the Qualcomm wcn3620/60/80 WiFi block.
> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
> > ---
> >  .../bindings/net/wireless/qcom,wcn36xx-wifi.txt    | 76 ++++++++++++++++++++++
> >  1 file changed, 76 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/net/wireless/qcom,wcn36xx-wifi.txt
> > 
> > diff --git a/Documentation/devicetree/bindings/net/wireless/qcom,wcn36xx-wifi.txt b/Documentation/devicetree/bindings/net/wireless/qcom,wcn36xx-wifi.txt
> > new file mode 100644
> > index 000000000000..7b314b9f30af
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/wireless/qcom,wcn36xx-wifi.txt
> > @@ -0,0 +1,76 @@
> > +Qualcomm WCN36xx WiFi Binding
> > +
> > +This binding describes the Qualcomm WCN36xx WiFi hardware. The hardware block
> > +is part of the Qualcomm WCNSS core, a WiFi/BT/FM combo chip, found in a variety
> > +of Qualcomm platforms.
> 
> Are BT/FM functions completely separate? If so, separate bindings are 
> okay. If not, then we need to describe the full chip.
> 

It's three different hardware blocks (WiFi, BT and FM-radio) with shared
RF-hardware and an ARM core for control logic.

There seems to be some control commands going towards the BT part that
controls coexistence properties of the RF-hardware, but other than that
I see it as logically separate blocks.


So I think it's fine to model this as separate pieces in DT.

Regards,
Bjorn
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