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     1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/gnss/gnss-common.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Common Properties for Global Navigation Satellite Systems (GNSS)
    8   receiver devices
    9 
   10 maintainers:
   11   - Johan Hovold <johan@kernel.org>
   12 
   13 description: |
   14   This document defines device tree properties common to Global Navigation
   15   Satellite System receivers.
   16 
   17 properties:
   18   $nodename:
   19     pattern: "^gnss(@.*)?$"
   20 
   21   lna-supply:
   22     description: A separate regulator supplying power for the Low Noise
   23       Amplifier (LNA). This is an amplifier connected between the GNSS
   24       device and the receiver antenna.
   25 
   26   enable-gpios:
   27     description: A GPIO line that will enable the GNSS receiver when
   28       asserted. If this line is active low, the GPIO phandle should
   29       consequently be tagged with the GPIO_ACTIVE_LOW flag so the operating
   30       system can rely on asserting the line to enable the GNSS device.
   31     maxItems: 1
   32 
   33   timepulse-gpios:
   34     description: When a timepulse is provided to the GNSS device using a
   35       GPIO line, this is used.
   36     maxItems: 1
   37 
   38   current-speed:
   39     description: The baudrate in bits per second of the device as it comes
   40       online, current active speed.
   41     $ref: /schemas/types.yaml#/definitions/uint32
   42 
   43 additionalProperties: true
   44 
   45 examples:
   46   - |
   47     #include <dt-bindings/gpio/gpio.h>
   48     serial {
   49       gnss {
   50         compatible = "u-blox,neo-8";
   51         vcc-supply = <&gnss_reg>;
   52         timepulse-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
   53         current-speed = <4800>;
   54       };
   55     };
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