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Date:   Mon, 26 Mar 2018 15:59:20 +0200
From:   Pavel Machek <pavel@ucw.cz>
To:     "H. Nikolaus Schaller" <hns@goldelico.com>
Cc:     Johan Hovold <johan@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        DTML <devicetree@vger.kernel.org>,
        Discussions about the Letux Kernel 
        <letux-kernel@openphoenux.org>,
        =?iso-8859-1?Q?Beno=EEt?= Cousson <bcousson@baylibre.com>,
        Arnd Bergmann <arnd@arndb.de>,
        Tony Lindgren <tony@atomide.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        kernel@pyra-handheld.com, Russell King <linux@armlinux.org.uk>,
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        Andreas =?iso-8859-1?Q?F=E4rber?= <afaerber@suse.de>,
        Jonathan Cameron <jic23@kernel.org>
Subject: Re: [Letux-kernel] [PATCH v5 3/5] misc serdev: Add w2sg0004 (gps
 receiver) power control driver
Message-ID: <20180326135920.GA1450@amd>
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Hi!

> > No, we need some kind of at least rudimentary gps framework even if we
> > allow for a raw (NMEA) interface for the time being (possibly
> > indefinitely).
>=20
> Ok, that would be fine if we can get that!
>=20
> For a minimal set of API I think something like this (following hci_dev) =
would suffice:
>=20
> struct gps_dev {
> 	...
> 	int (*open)(struct gps_dev *gdev);
> 	int (*close)(struct gps_dev *gdev);
> 	int (*send)(struct gps_dev *gdev, char *data, int length);
> };
>=20
> int gps_register_dev(struct gps_dev *gdev);
> void gps_unregister_dev(struct gps_dev *gdev);
> int gps_recv_nmea_chars(struct gps_dev *gdev, char *data, int length);
>=20
> If that would wrap all creation of some /dev/ttyGPS0 (or however it is ca=
lled),
> it would fit our needs for a driver and user-space for our system.
>=20
> And I would be happy to get rid of creating and registering a /dev/ttyGPS0
> in the w2sg0004 driver.

Sounds like a good start.

Best regards,
									Pavel
--=20
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo=
g.html

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