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Fri, 15 Feb 2019 04:10:39 -0800 (PST) Received: from localhost ([2620:10d:c092:180::1:2b]) by smtp.gmail.com with ESMTPSA id d31sm1475619edd.84.2019.02.15.04.10.37 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 15 Feb 2019 04:10:38 -0800 (PST) References: <1547744074-28308-1-git-send-email-lollivier@baylibre.com> <1547744074-28308-3-git-send-email-lollivier@baylibre.com> <20190125090755.GB3691@localhost> <867eeo7pjm.fsf@baylibre.com> <20190211083349.GU4686@localhost> <86mun2v27r.fsf@baylibre.com> <20190214091121.GI28278@localhost> User-agent: mu4e 1.0; emacs 25.3.2 From: Loys Ollivier To: Johan Hovold Cc: Loys Ollivier , "open list\:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Rob Herring , Mark Rutland , linux-kernel@vger.kernel.org, Kevin Hilman , "open list\:ARM\/Amlogic Meson..." , "moderated list\:ARM\/Mediatek SoC support" , Linux ARM , Martin Blumenstingl Subject: Re: [PATCH v2 2/4] dt-bindings: gnss: add mediatek binding In-reply-to: <20190214091121.GI28278@localhost> Date: Fri, 15 Feb 2019 13:10:35 +0100 Message-ID: <86ef89fe10.fsf@baylibre.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 14 Feb 2019 at 09:11, Johan Hovold wrote: > On Wed, Feb 13, 2019 at 04:24:00PM +0100, Loys Ollivier wrote: >> On Mon 11 Feb 2019 at 14:17, Loys Ollivier wrote: >> > On Mon 11 Feb 2019 at 08:33, Johan Hovold wrote: > >> >> Right, but please do look around for other receivers using this chipset >> >> so that we can make the binding generic enough to cover those as well >> >> (e.g. by choosing representative resource names). >> >> >> > OK will have a look. >> >> The only mt3339-based receivers I have found are: >> - [0] Globaltop >> - [1] Locosys / Pololu >> They both only provide the UART interface and do not list the I2C/SPI >> interfaces. >> >> [0] https://cdn-shop.adafruit.com/datasheets/GlobalTop-FGPMMOPA6H-Datasheet-V0A.pdf >> [1] https://www.pololu.com/file/0J641/LS20030~3_datasheet_v1.3.pdf > > I found tree more: > Ah nice. > - Globaltop PA6C > > - https://cdn-shop.adafruit.com/datasheets/GlobalTop-FGPMMOPA6C-Datasheet-V0A-Preliminary.pdf > > - Linx RM series > - https://linxtechnologies.com/wp/wp-content/uploads/rxm-gps-rm.pdf This is a different chip: MT3337; Apparently this chip only provides an UART interface: https://labs.mediatek.com/en/chipset/MT3337 However it looks interesting. I'll look for a sample to test it in the future :) > > - ublox IT530 > - https://www.u-blox.com/sites/default/files/products/documents/IT530_DataSheet_%28FTX-HW-12008%29.pdf > > All with uart-interface only and similar pins names, although the ublox > device do have some additional features we can worry about later. > > As all but the ublox device use VBACKUP for the backup supply, do you > mind if I change the binding to use "vbackup-supply" instead of > "v-bckp-supply" (which is a ublox-ism) when applying? I don't mind. You can go ahead and change the binding. For reference, the v4 patch serie: https://lkml.kernel.org/r/1550070569-18588-1-git-send-email-lollivier@baylibre.com Thanks, Loys > > Thanks, > Johan -- -L