xref: /freebsd/sys/contrib/device-tree/Bindings/gnss/brcm,bcm4751.yaml (revision e6bfd18d21b225af6a0ed67ceeaf1293b7b9eba5) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/gnss/brcm,bcm4751.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Broadcom BCM4751 family GNSS Receiver Device Tree Bindings
8
9maintainers:
10  - Johan Hovold <johan@kernel.org>
11  - Linus Walleij <linus.walleij@linaro.org>
12
13description:
14  Broadcom GPS chips can be used over the UART or I2C bus. The UART
15  bus requires CTS/RTS support. The number of the capsule is more
16  elaborate than the compatibles BCM4751 may be printed
17  BCM4751IFBG for example.
18
19allOf:
20  - $ref: gnss-common.yaml#
21
22properties:
23  compatible:
24    enum:
25      - brcm,bcm4751
26      - brcm,bcm4752
27      - brcm,bcm4753
28
29  reg:
30    description:
31      The I2C Address, not required on UART buses.
32
33  vdd-auxin-supply:
34    description:
35      Main voltage supply, pin name VDD_AUXIN, typically connected
36      directly to a battery such as LiIon 3.8V battery or a 2.6V supply.
37
38  vddio-supply:
39    description:
40      IO voltage supply, pin name VDDIO, typically 1.8V
41
42  reset-gpios:
43    maxItems: 1
44    description: An optional active low reset line, should be flagged with
45      GPIO_ACTIVE_LOW.
46
47  enable-gpios:
48    description: Enable GPIO line, connected to pins named REGPU or NSTANDBY.
49      If the line is active low such as NSTANDBY, it should be tagged
50      GPIO_ACTIVE_LOW.
51
52required:
53  - compatible
54  - enable-gpios
55
56unevaluatedProperties: false
57
58examples:
59  - |
60    #include <dt-bindings/gpio/gpio.h>
61    serial {
62        gnss {
63            compatible = "brcm,bcm4751";
64            vdd-auxin-supply = <&vbat>;
65            reset-gpios = <&gpio0 15 GPIO_ACTIVE_LOW>;
66            enable-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>;
67            current-speed = <38400>;
68        };
69    };
70