From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Thu, 14 Jun 2018 21:44:38 +0200 Subject: [PATCH v7 3/6] DTS: gta04: add uart2 child node for w2sg0004 GPS receiver In-Reply-To: <9ebb28aed589aca8e9b5bc5c910f1d2f0d62669d.1525340143.git.hns@goldelico.com> References: <9ebb28aed589aca8e9b5bc5c910f1d2f0d62669d.1525340143.git.hns@goldelico.com> Message-ID: <20180614194428.GA17808@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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. > > Note that there is no WAKEUP output from the W2SG0004, > hence we can't use the generic SirfStar binding. > > 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? -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: