kernel/drivers/net/ieee802154/dw3000-overlay.dts

// Device Tree overlay for dw3000 for Raspberry Pi 4
// Using a DW3700 shield connected using an Waveshare ARPI600 HAT.

/dts-v1/;
/plugin/;

/ {
    compatible = "brcm,brcm2711";

    /* Ensure spi0 is enabled */

    fragment@0 {
        target = <&spi0>;
        __overlay__ {
            status = "okay";
        };
    };

    /* Disable spi-dev for spi0.0 & spi0.1 */

    fragment@1 {
        target = <&spidev0>;
        __overlay__ {
            status = "disabled";
        };
    };

    fragment@2 {
        target = <&spidev1>;
        __overlay__ {
            status = "disabled";
        };
    };

    /* Configure additional GPIOs */
    /* Check if wherre we wire it in driver */

    fragment@3 {
        target = <&gpio>;
        __overlay__ {
            dw3000_pins: dw3000_pins {
                /* Wakeup, IRQ, RST on GPIO4, GPIO25 and GPIO24 */
                brcm,pins = <4 25 24>;
                brcm,function = <0x0 0x0 0x0>;
                /* Pull up/down config: 0: disabled, 1: down, 2: up */
                brcm,pull = <0 1 2>;
            };
        };
    };

    /* Add DW3000 device on spi0.0 */

    fragment@4 {
        target = <&spi0>;
        __overlay__ {
            #address-cells = <1>;
            #size-cells = <0>;
            dw3000: dw3000@0 {
                compatible = "decawave,dw3000";
                reg = <0>; /* CE0 */
                pinctrl-names = "default";
                pinctrl-0 = <&dw3000_pins>;
                interrupt-parent = <&gpio>;
                interrupts = <25 4>; /*IRQ_TYPE_LEVEL_HIGH*/
                spi-max-frequency = <20000000>;
                uwbhal,reset-gpio = <&gpio 24 4>; /* OPEN_DRAIN */
                decawave,eui64 = /bits/ 64 <0>;
                decawave,panid = /bits/ 16 <0>;
                status = "okay";
            };
        };
    };

    __overrides__ {
        eui64 = <&dw3000>,"decawave,eui64#0";
        panid = <&dw3000>,"decawave,panid;0";
    };
};