| # 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 devicetree bindings |
| |
| maintainers: |
| - Jérôme Pouiller <jerome.pouiller@silabs.com> |
| |
| description: |
| The WFxxx chip series can be connected via SPI or via SDIO. |
| |
| For SDIO':' |
| |
| The driver is able to detect a WFxxx chip on SDIO bus by matching its Vendor |
| ID and Product ID. However, driver will only provide limited features in |
| this case. Thus declaring WFxxx chip in device tree is recommended (and may |
| become mandatory in the future). |
| |
| In addition, it is recommended to declare a mmc-pwrseq on SDIO host above |
| WFx. Without it, you may encounter issues with warm boot. The mmc-pwrseq |
| should be compatible with mmc-pwrseq-simple. Please consult |
| Documentation/devicetree/bindings/mmc/mmc-pwrseq-simple.yaml for more |
| information. |
| |
| For SPI':' |
| |
| In add of the properties below, please consult |
| Documentation/devicetree/bindings/spi/spi-controller.yaml for optional SPI |
| related properties. |
| |
| Note that in add of the properties below, the WFx driver also supports |
| `mac-address` and `local-mac-address` as described in |
| Documentation/devicetree/bindings/net/ethernet.txt |
| |
| properties: |
| compatible: |
| const: silabs,wf200 |
| 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 |
| spi-max-frequency: |
| description: (SPI only) Maximum SPI clocking speed of device in Hz. |
| maxItems: 1 |
| interrupts: |
| description: The interrupt line. Triggers IRQ_TYPE_LEVEL_HIGH and |
| IRQ_TYPE_EDGE_RISING are both supported by the chip and the driver. 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 legacy purpose, the gpio in inverted when compatible == |
| "silabs,wfx-spi") |
| |
| 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 |
| config-file: |
| description: Use an alternative file as PDS. Default is `wf200.pds`. Only |
| necessary for development/debug purpose. |
| maxItems: 1 |
| |
| required: |
| - compatible |
| - reg |
| |
| examples: |
| - | |
| #include <dt-bindings/gpio/gpio.h> |
| #include <dt-bindings/interrupt-controller/irq.h> |
| |
| spi0 { |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| wfx@0 { |
| compatible = "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>; |
| }; |
| |
| mmc0 { |
| mmc-pwrseq = <&wfx_pwrseq>; |
| #address-cells = <1>; |
| #size-cells = <0>; |
| |
| mmc@1 { |
| compatible = "silabs,wf200"; |
| pinctrl-names = "default"; |
| pinctrl-0 = <&wfx_wakeup>; |
| reg = <1>; |
| wakeup-gpios = <&gpio 12 GPIO_ACTIVE_HIGH>; |
| }; |
| }; |
| ... |
