From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [PATCH v7 3/6] DTS: gta04: add uart2 child node for w2sg0004 GPS receiver Date: Thu, 14 Jun 2018 21:44:38 +0200 Message-ID: <20180614194428.GA17808@amd> References: <9ebb28aed589aca8e9b5bc5c910f1d2f0d62669d.1525340143.git.hns@goldelico.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="vGgW1X5XWziG23Ko" Return-path: Content-Disposition: inline In-Reply-To: <9ebb28aed589aca8e9b5bc5c910f1d2f0d62669d.1525340143.git.hns@goldelico.com> Sender: linux-kernel-owner@vger.kernel.org To: "H. Nikolaus Schaller" Cc: Johan Hovold , afd@ti.com, Rob Herring , Mark Rutland , =?iso-8859-1?Q?Beno=EEt?= Cousson , Tony Lindgren , Russell King , Arnd Bergmann , Greg Kroah-Hartman , Kevin Hilman , Andreas =?iso-8859-1?Q?F=E4rber?= , Thierry Reding , Jonathan Cameron , Noralf =?iso-8859-1?Q?Tr=F8nnes?= , David Lechner , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, letux-kernel@openphoenux.org, kernel@pyra-handheld.com, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org --vGgW1X5XWziG23Ko Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu 2018-05-03 11:35:48, H. Nikolaus Schaller wrote: > GTA04 has a W2SG0004 module connected to UART2 of the OMAP3 > processor. A GPIO can pulse the on/off toggle switch. >=20 > Note that there is no WAKEUP output from the W2SG0004, > hence we can't use the generic SirfStar binding. >=20 > The VSIM regulator is used to power on/off the LNA of an > external active GPS antenna so that a driver can turn the > LNA off if GPS is not needed to save battery energy. This reads as if you did low->high->low to turn GPS on, then low->high->low to turn GPS off again. Is that correct? --=20 (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blo= g.html --vGgW1X5XWziG23Ko Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iEYEARECAAYFAlsixaYACgkQMOfwapXb+vIR+QCdEaJCgNlT/StRfo2wpu6IL5DZ f5oAnRk0pf0CnytX6uUjiTwnFyuk9B9F =NzCb -----END PGP SIGNATURE----- --vGgW1X5XWziG23Ko--