Documentation/devicetree/bindings/net/wireless/silabs,wfx.yaml

   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 ...