1* Smarthome-Wolf Pi433 - a 433MHz radio module/shield for Raspberry Pi (see www.pi433.de) 2 3Required properties: 4- compatible: must be "Smarthome-Wolf,pi433" 5- reg: chip select of SPI Interface 6- DIOx-gpio must be dedicated to the GPIO, connected with DIOx of the RFM69 module 7 8 9Example: 10 11With the following lines in gpio-section, the gpio pins, connected with pi433 are 12reserved/declared. 13 14&gpio{ 15 [...] 16 17 pi433_pins: pi433_pins { 18 brcm,pins = <7 25 24>; 19 brcm,function = <0 0 0>; // in in in 20 }; 21 22 [...] 23} 24 25With the following lines in spi section, the device pi433 is declared. 26It consists of the three gpio pins and an spi interface (here chip select 0) 27 28&spi0{ 29 [...] 30 31 pi433: pi433@0 { 32 compatible = "Smarthome-Wolf,pi433"; 33 reg = <0>; /* CE 0 */ 34 #address-cells = <1>; 35 #size-cells = <0>; 36 spi-max-frequency = <10000000>; 37 38 pinctrl-0 = <&pi433_pins>; 39 DIO0-gpio = <&gpio 24 0>; 40 DIO1-gpio = <&gpio 25 0>; 41 DIO2-gpio = <&gpio 7 0>; 42 }; 43} 44 45 46 47For Raspbian users only 48======================= 49Since Raspbian supports device tree overlays, you may use an overlay instead 50of editing your boards device tree. 51To use the overlay, you need to compile the file pi433-overlay.dts which can 52be found alongside this documentation. 53The file needs to be compiled - either manually or by integration in your kernel 54source tree. For a manual compile, you may use a command line like the following: 55'linux/scripts/dtc/dtc -@ -I dts -O dtb -o pi433.dtbo pi433-overlay.dts' 56 57For compiling inside of the kernel tree, you need to copy pi433-overlay.dts to 58arch/arm/boot/dts/overlays and you need to add the file to the list of files 59in the Makefile over there. Execute 'make dtbs' in kernel tree root to make the 60kernel make files compile the device tree overlay for you. 61 62 63