# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
# Copyright (c) 2020, Silicon Laboratories, Inc.
%YAML 1.2
---
$id: http://devicetree.org/schemas/net/wireless/silabs,wfx.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Silicon Labs WFxxx
maintainers:
- Jérôme Pouiller <[email protected]>
description: >
Support for the Wifi chip WFxxx from Silicon Labs. Currently, the only device
from the WFxxx series is the WF200 described here:
https://www.silabs.com/documents/public/data-sheets/wf200-datasheet.pdf
The WF200 can be connected via SPI or via SDIO.
For SDIO:
Declaring the WFxxx chip in device tree is mandatory (usually, the VID/PID is
sufficient for the SDIO devices).
It is recommended to declare a mmc-pwrseq on SDIO host above WFx. Without
it, you may encounter issues during reboot. The mmc-pwrseq should be
compatible with mmc-pwrseq-simple. Please consult
Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.yaml for more
information.
properties:
compatible:
items:
- enum:
- prt,prtt1c-wfm200 # Protonic PRTT1C Board
- silabs,brd4001a # WGM160P Evaluation Board
- silabs,brd8022a # WF200 Evaluation Board
- silabs,brd8023a # WFM200 Evaluation Board
- const: silabs,wf200 # Chip alone without antenna
reg:
description:
When used on SDIO bus, <reg> must be set to 1. When used on SPI bus, it is
the chip select address of the device as defined in the SPI devices
bindings.
maxItems: 1
interrupts:
description: The interrupt line. Should be IRQ_TYPE_EDGE_RISING. When SPI is
used, this property is required. When SDIO is used, the "in-band"
interrupt provided by the SDIO bus is used unless an interrupt is defined
in the Device Tree.
maxItems: 1
reset-gpios:
description: (SPI only) Phandle of gpio that will be used to reset chip
during probe. Without this property, you may encounter issues with warm
boot.
For SDIO, the reset gpio should declared using a mmc-pwrseq.
maxItems: 1
wakeup-gpios:
description: Phandle of gpio that will be used to wake-up chip. Without this
property, driver will disable most of power saving features.
maxItems: 1
silabs,antenna-config-file:
$ref: /schemas/types.yaml#/definitions/string
description: Use an alternative file for antenna configuration (aka
"Platform Data Set" in Silabs jargon). Default depends of "compatible"
string. For "silabs,wf200", the default is 'wf200.pds'.
local-mac-address: true
mac-address: true
required:
- compatible
- reg
allOf:
- $ref: /schemas/spi/spi-peripheral-props.yaml#
unevaluatedProperties: false
examples:
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
spi {
#address-cells = <1>;
#size-cells = <0>;
wifi@0 {
compatible = "silabs,brd8022a", "silabs,wf200";
pinctrl-names = "default";
pinctrl-0 = <&wfx_irq &wfx_gpios>;
reg = <0>;
interrupts-extended = <&gpio 16 IRQ_TYPE_EDGE_RISING>;
wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
spi-max-frequency = <42000000>;
};
};
- |
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/interrupt-controller/irq.h>
wfx_pwrseq: wfx_pwrseq {
compatible = "mmc-pwrseq-simple";
pinctrl-names = "default";
pinctrl-0 = <&wfx_reset>;
reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
};
mmc {
mmc-pwrseq = <&wfx_pwrseq>;
#address-cells = <1>;
#size-cells = <0>;
wifi@1 {
compatible = "silabs,brd8022a", "silabs,wf200";
pinctrl-names = "default";
pinctrl-0 = <&wfx_wakeup>;
reg = <1>;
wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
};
};
...
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