arch/arm/boot/dts/overlays/si446x-spi0-overlay.dts

   1 // Overlay for the SiLabs Si446X Controller - SPI0
   2 // Default Interrupt Pin: 17
   3 // Default SDN Pin: 27
   4 /dts-v1/;
   5 /plugin/;
   6
   7    / {
   8     compatible = "brcm,bcm2835";
   9
  10     fragment@0 {
  11         target = <&spi0>;
  12         __overlay__ {
  13             // needed to avoid dtc warning
  14             #address-cells = <1>;
  15             #size-cells = <0>;
  16
  17             status = "okay";
  18
  19             uhf0: si446x@0{
  20                 compatible = "silabs,si446x";
  21                 reg = <0>; // CE0
  22                 pinctrl-names = "default";
  23                 pinctrl-0 = <&uhf0_pins>;
  24                 interrupt-parent = <&gpio>;
  25                 interrupts = <17 0x2>; // falling edge
  26                 spi-max-frequency = <4000000>;
  27                 sdn_pin = <27>;
  28                 irq_pin = <17>;
  29                 status = "okay";
  30             };
  31         };
  32     };
  33
  34     fragment@1 {
  35         target = <&gpio>;
  36         __overlay__ {
  37             uhf0_pins: uhf0_pins {
  38                 brcm,pins = <17 27>;
  39                 brcm,function = <0 1>; // in, out
  40                 brcm,pull = <2 0>; // high, none
  41             };
  42         };
  43     };
  44
  45     __overrides__ {
  46         int_pin = <&uhf0>, "interrupts:0",
  47                   <&uhf0>, "irq_pin:0",
  48                   <&uhf0_pins>, "brcm,pins:0";
  49         reset_pin = <&uhf0>, "sdn_pin:0",
  50                     <&uhf0_pins>, "brcm,pins:4";
  51         speed   = <&uhf0>, "spi-max-frequency:0";
  52     };
  53 };