linux-kernel - Re: [RFC PATCH 0/3] bluetooth/gnss: GNSS support for TiWi chips

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Message-ID: <20231127205144.2137de38@aktux>
Date:   Mon, 27 Nov 2023 20:51:44 +0100
From:   Andreas Kemnade <andreas@...nade.info>
To:     Adam Ford <aford173@...il.com>
Cc:     marcel@...tmann.org, johan.hedberg@...il.com, luiz.dentz@...il.com,
        johan@...nel.org, arnd@...db.de, gregkh@...uxfoundation.org,
        linux-bluetooth@...r.kernel.org, linux-kernel@...r.kernel.org,
        tomi.valkeinen@...asonboard.com, Tony Lindgren <tony@...mide.com>,
        Péter Ujfalusi <peter.ujfalusi@...il.com>,
        robh@...nel.org
Subject: Re: [RFC PATCH 0/3] bluetooth/gnss: GNSS support for TiWi chips

On Mon, 27 Nov 2023 08:03:24 -0600
Adam Ford <aford173@...il.com> wrote:

> On Sun, Nov 26, 2023 at 1:47 PM Andreas Kemnade <andreas@...nade.info> wrote:
> >
> > Some of these chips have GNSS support. In some vendor kernels
> > a driver on top of misc/ti-st can be found providing a /dev/tigps
> > device which speaks the secretive Air Independent Interface (AI2) protocol.
> > Implement something comparable as a GNSS interface.
> >
> > With some userspace tools a proof-of-concept can be shown. A position
> > can be successfully read out.  Basic properties of the protocol are
> > understood.
> >
> > This was tested on the Epson Moverio BT-200.  
> 
> Can you tell me which WiLink chip this uses?
> 
> I'd like to try it on the WL1283, but I want to understand which
> WiLink chips you're targeting.
> 
I think, it is a WL1283 here, too.

If you want to play around with it now:
- set the devicetree node name to bluetooth-gnss
- for testing you can use the read-gps program at https://github.com/akemnade/bt200tools

Regards,
Andreas