xref: /linux/Documentation/devicetree/bindings/net/wireless/silabs,wfx.yaml (revision fd7d598270724cc787982ea48bbe17ad383a8b7f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2# Copyright (c) 2020, Silicon Laboratories, Inc.
3%YAML 1.2
4---
5$id: http://devicetree.org/schemas/net/wireless/silabs,wfx.yaml#
6$schema: http://devicetree.org/meta-schemas/core.yaml#
7
8title: Silicon Labs WFxxx
9
10maintainers:
11  - Jérôme Pouiller <jerome.pouiller@silabs.com>
12
13description: >
14  Support for the Wifi chip WFxxx from Silicon Labs. Currently, the only device
15  from the WFxxx series is the WF200 described here:
16     https://www.silabs.com/documents/public/data-sheets/wf200-datasheet.pdf
17
18  The WF200 can be connected via SPI or via SDIO.
19
20  For SDIO:
21
22    Declaring the WFxxx chip in device tree is mandatory (usually, the VID/PID is
23    sufficient for the SDIO devices).
24
25    It is recommended to declare a mmc-pwrseq on SDIO host above WFx. Without
26    it, you may encounter issues during reboot. The mmc-pwrseq should be
27    compatible with mmc-pwrseq-simple. Please consult
28    Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.yaml for more
29    information.
30
31properties:
32  compatible:
33    items:
34      - enum:
35          - prt,prtt1c-wfm200 # Protonic PRTT1C Board
36          - silabs,brd4001a # WGM160P Evaluation Board
37          - silabs,brd8022a # WF200 Evaluation Board
38          - silabs,brd8023a # WFM200 Evaluation Board
39      - const: silabs,wf200 # Chip alone without antenna
40
41  reg:
42    description:
43      When used on SDIO bus, <reg> must be set to 1. When used on SPI bus, it is
44      the chip select address of the device as defined in the SPI devices
45      bindings.
46    maxItems: 1
47
48  interrupts:
49    description: The interrupt line. Should be IRQ_TYPE_EDGE_RISING. When SPI is
50      used, this property is required. When SDIO is used, the "in-band"
51      interrupt provided by the SDIO bus is used unless an interrupt is defined
52      in the Device Tree.
53    maxItems: 1
54
55  reset-gpios:
56    description: (SPI only) Phandle of gpio that will be used to reset chip
57      during probe. Without this property, you may encounter issues with warm
58      boot.
59
60      For SDIO, the reset gpio should declared using a mmc-pwrseq.
61    maxItems: 1
62
63  wakeup-gpios:
64    description: Phandle of gpio that will be used to wake-up chip. Without this
65      property, driver will disable most of power saving features.
66    maxItems: 1
67
68  silabs,antenna-config-file:
69    $ref: /schemas/types.yaml#/definitions/string
70    description: Use an alternative file for antenna configuration (aka
71      "Platform Data Set" in Silabs jargon). Default depends of "compatible"
72      string. For "silabs,wf200", the default is 'wf200.pds'.
73
74  local-mac-address: true
75
76  mac-address: true
77
78required:
79  - compatible
80  - reg
81
82allOf:
83  - $ref: /schemas/spi/spi-peripheral-props.yaml#
84
85unevaluatedProperties: false
86
87examples:
88  - |
89    #include <dt-bindings/gpio/gpio.h>
90    #include <dt-bindings/interrupt-controller/irq.h>
91
92    spi {
93        #address-cells = <1>;
94        #size-cells = <0>;
95
96        wifi@0 {
97            compatible = "silabs,brd8022a", "silabs,wf200";
98            pinctrl-names = "default";
99            pinctrl-0 = <&wfx_irq &wfx_gpios>;
100            reg = <0>;
101            interrupts-extended = <&gpio 16 IRQ_TYPE_EDGE_RISING>;
102            wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
103            reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
104            spi-max-frequency = <42000000>;
105        };
106    };
107
108  - |
109    #include <dt-bindings/gpio/gpio.h>
110    #include <dt-bindings/interrupt-controller/irq.h>
111
112    wfx_pwrseq: wfx_pwrseq {
113        compatible = "mmc-pwrseq-simple";
114        pinctrl-names = "default";
115        pinctrl-0 = <&wfx_reset>;
116        reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
117    };
118
119    mmc {
120        mmc-pwrseq = <&wfx_pwrseq>;
121        #address-cells = <1>;
122        #size-cells = <0>;
123
124        wifi@1 {
125            compatible = "silabs,brd8022a", "silabs,wf200";
126            pinctrl-names = "default";
127            pinctrl-0 = <&wfx_wakeup>;
128            reg = <1>;
129            wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
130        };
131    };
132...
133