xref: /openbmc/linux/Documentation/devicetree/bindings/gnss/brcm,bcm4751.yaml (revision 4f2c0a4acffbec01079c28f839422e64ddeff004)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/gnss/brcm,bcm4751.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Broadcom BCM4751 family GNSS Receiver

maintainers:
  - Johan Hovold <johan@kernel.org>
  - Linus Walleij <linus.walleij@linaro.org>

description:
  Broadcom GPS chips can be used over the UART or I2C bus. The UART
  bus requires CTS/RTS support. The number of the capsule is more
  elaborate than the compatibles BCM4751 may be printed
  BCM4751IFBG for example.

allOf:
  - $ref: gnss-common.yaml#

properties:
  compatible:
    enum:
      - brcm,bcm4751
      - brcm,bcm4752
      - brcm,bcm4753

  reg:
    description:
      The I2C Address, not required on UART buses.

  vdd-auxin-supply:
    description:
      Main voltage supply, pin name VDD_AUXIN, typically connected
      directly to a battery such as LiIon 3.8V battery or a 2.6V supply.

  vddio-supply:
    description:
      IO voltage supply, pin name VDDIO, typically 1.8V

  reset-gpios:
    maxItems: 1
    description: An optional active low reset line, should be flagged with
      GPIO_ACTIVE_LOW.

  enable-gpios:
    description: Enable GPIO line, connected to pins named REGPU or NSTANDBY.
      If the line is active low such as NSTANDBY, it should be tagged
      GPIO_ACTIVE_LOW.

required:
  - compatible
  - enable-gpios

unevaluatedProperties: false

examples:
  - |
    #include <dt-bindings/gpio/gpio.h>
    serial {
        gnss {
            compatible = "brcm,bcm4751";
            vdd-auxin-supply = <&vbat>;
            reset-gpios = <&gpio0 15 GPIO_ACTIVE_LOW>;
            enable-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
            current-speed = <38400>;
        };
    };