linux-kernel - Re: [PATCH 0/4] Add driver for globaltop GNSS receivers

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Message-ID: <86bm4x6830.fsf@baylibre.com>
Date:   Thu, 03 Jan 2019 17:04:35 +0100
From:   Loys Ollivier <lollivier@...libre.com>
To:     Loys Ollivier <lollivier@...libre.com>, devicetree@...r.kernel.org,
        Johan Hovold <johan@...nel.org>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        linux-kernel@...r.kernel.org, Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org,
        Neil Armstrong <narmstrong@...libre.com>
Subject: Re: [PATCH 0/4] Add driver for globaltop GNSS receivers


As suggested by Neil Armstrong - this GNSS device seems to behave 
like
most generic GNSS receivers.
I'll send a v2 with a generic driver that works for both GlobalTop 
and
u-blox.

Please ignore this serie.

Thanks,

Loys

Loys Ollivier writes:

> Hello !
>
> This patch series adds a new GNSS driver for the globaltop GNSS 
> receivers.
> These receivers transmits NMEA output sequence as soon as they 
> have booted.
> Power management can be done via the main supply and optional 
> backup supply
> as defined in the device tree.
>
> The driver has been tested using a GlobalTop pa6h chipset on a 
> Libretech-cc
> board using the expansion header. Changes made in the board 
> device tree can
> be found below for reference and testing.
>
> Loys
>
> Loys Ollivier (4):
>   dt-bindings: Add vendor prefix for "GlobalTop Technology, 
>   Inc."
>   dt-bindings: gnss: add gtop binding
>   gnss: add gtop receiver type support
>   gnss: add driver for globaltop receivers
>
>  Documentation/devicetree/bindings/gnss/gtop.txt    |  33 +++++
>  .../devicetree/bindings/vendor-prefixes.txt        |   1 +
>  drivers/gnss/Kconfig                               |  13 ++
>  drivers/gnss/Makefile                              |   3 +
>  drivers/gnss/core.c                                |   1 +
>  drivers/gnss/gtop.c                                | 152 
>  +++++++++++++++++++++
>  include/linux/gnss.h                               |   1 +
>  7 files changed, 204 insertions(+)
>  create mode 100644 
>  Documentation/devicetree/bindings/gnss/gtop.txt
>  create mode 100644 drivers/gnss/gtop.c
>
> ---
> diff --git 
> a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts 
> b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
> index 90a56af967a7..3b3d4dcc47aa 100644
> --- 
> a/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
> +++ 
> b/arch/arm64/boot/dts/amlogic/meson-gxl-s905x-libretech-cc.dts
> @@ -17,6 +17,7 @@
>  
>         aliases {
>                 serial0 = &uart_AO;
> +               serial1 = &uart_A;
>                 ethernet0 = &ethmac;
>         };
>  
> @@ -269,7 +270,20 @@
>         pinctrl-names = "default";
>  };
>  
> +/* This is brought out on the UART_A_TX (8) and UART_A_RX (10) 
> pins: */
> +&uart_A {
> +       status = "okay";
> +       pinctrl-0 = <&uart_a_pins>;
> +       pinctrl-names = "default";
> +
> +       gnss {
> +               compatible = "globaltop,pa6h";
> +               v-bckp-supply = <&vcc_3v3>;
> +               vcc-supply = <&vcc_3v3>;
> +               current-speed = <9600>;
> +       };
> +};
> +
>  &usb0 {
>         status = "okay";
>  };


-- 
-L