[Letux-kernel] [PATCH v7 3/6] DTS: gta04: add uart2 child node for w2sg0004 GPS receiver

Pavel Machek pavel at ucw.cz
Thu Jun 14 21:44:38 CEST 2018


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
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