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
8 title: Silicon Labs WFxxx
9
10 maintainers:
11 - Jérôme Pouiller <jerome.pouiller@silabs.com>
12
13 description: >
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
31 properties:
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
78 required:
79 - compatible
80 - reg
81
82 allOf:
83 - $ref: /schemas/spi/spi-peripheral-props.yaml#
84
85 unevaluatedProperties: false
86
87 examples:
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 ...
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