# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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# Copyright (c) 2020, Silicon Laboratories, Inc.
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/net/wireless/silabs,wfx.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Silicon Labs WFxxx devicetree bindings
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maintainers:
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- Jérôme Pouiller <jerome.pouiller@silabs.com>
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description:
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The WFxxx chip series can be connected via SPI or via SDIO.
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For SDIO':'
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The driver is able to detect a WFxxx chip on SDIO bus by matching its Vendor
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ID and Product ID. However, driver will only provide limited features in
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this case. Thus declaring WFxxx chip in device tree is recommended (and may
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become mandatory in the future).
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In addition, it is recommended to declare a mmc-pwrseq on SDIO host above
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WFx. Without it, you may encounter issues with warm boot. The mmc-pwrseq
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should be compatible with mmc-pwrseq-simple. Please consult
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Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.yaml for more
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information.
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For SPI':'
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In add of the properties below, please consult
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Documentation/devicetree/bindings/spi/spi-controller.yaml for optional SPI
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related properties.
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Note that in add of the properties below, the WFx driver also supports
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`mac-address` and `local-mac-address` as described in
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Documentation/devicetree/bindings/net/ethernet.txt
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properties:
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compatible:
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const: silabs,wf200
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reg:
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description:
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When used on SDIO bus, <reg> must be set to 1. When used on SPI bus, it is
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the chip select address of the device as defined in the SPI devices
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bindings.
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maxItems: 1
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spi-max-frequency:
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description: (SPI only) Maximum SPI clocking speed of device in Hz.
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maxItems: 1
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interrupts:
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description: The interrupt line. Triggers IRQ_TYPE_LEVEL_HIGH and
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IRQ_TYPE_EDGE_RISING are both supported by the chip and the driver. When
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SPI is used, this property is required. When SDIO is used, the "in-band"
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interrupt provided by the SDIO bus is used unless an interrupt is defined
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in the Device Tree.
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maxItems: 1
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reset-gpios:
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description: (SPI only) Phandle of gpio that will be used to reset chip
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during probe. Without this property, you may encounter issues with warm
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boot. (For legacy purpose, the gpio in inverted when compatible ==
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"silabs,wfx-spi")
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For SDIO, the reset gpio should declared using a mmc-pwrseq.
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maxItems: 1
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wakeup-gpios:
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description: Phandle of gpio that will be used to wake-up chip. Without this
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property, driver will disable most of power saving features.
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maxItems: 1
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config-file:
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description: Use an alternative file as PDS. Default is `wf200.pds`. Only
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necessary for development/debug purpose.
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maxItems: 1
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required:
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- compatible
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- reg
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examples:
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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spi0 {
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#address-cells = <1>;
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#size-cells = <0>;
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wfx@0 {
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compatible = "silabs,wf200";
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pinctrl-names = "default";
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pinctrl-0 = <&wfx_irq &wfx_gpios>;
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reg = <0>;
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interrupts-extended = <&gpio 16 IRQ_TYPE_EDGE_RISING>;
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wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
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reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
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spi-max-frequency = <42000000>;
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};
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};
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- |
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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wfx_pwrseq: wfx_pwrseq {
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compatible = "mmc-pwrseq-simple";
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pinctrl-names = "default";
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pinctrl-0 = <&wfx_reset>;
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reset-gpios = <&gpio 13 GPIO_ACTIVE_LOW>;
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};
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mmc0 {
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mmc-pwrseq = <&wfx_pwrseq>;
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#address-cells = <1>;
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#size-cells = <0>;
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mmc@1 {
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compatible = "silabs,wf200";
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pinctrl-names = "default";
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pinctrl-0 = <&wfx_wakeup>;
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reg = <1>;
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wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>;
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};
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};
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...
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