Build device tree for 1-wire failed

[Fohnbit]

Hello,

I used the P9.12 pin for 1-wire ... this is working.

Now I want 2 lanes more. I thought to use for the second lane: P8.27 and P8.28

/*
 * Copyright (C) 2015 Robert Nelson <robert...@gmail.com>
 *
 * Virtual cape for onewire on connector pin P9.12
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

/* Modified by Connor Shapiro for use with P8.27 & P8.28 */

/dts-v1/;
/plugin/;

#include <dt-bindings/board/am335x-bbw-bbb-base.h>
#include <dt-bindings/gpio/gpio.h>
#include <dt-bindings/pinctrl/am33xx.h>

/ {
        compatible = "ti,beaglebone", "ti,beaglebone-black", "ti,beaglebone-green";

        /* identification */
        part-number = "BB-W1-P8.27_28";
        version = "00A0";

        /* state the resources this cape uses */
        exclusive-use =
                /* the pin header uses */
                "P8.27",
                "P8.28";

        /*
         * Free up the pins used by the cape from the pinmux helpers.
         */
        fragment@0 {
                target = <&ocp>;
                __overlay__ {
                        P8_27_pinmux { status = "disabled"; };
                        P8_28_pinmux { status = "disabled"; };
                };
        };
        
        fragment@1 {
                target = <&am33xx_pinmux>;
                __overlay__ {

                        dallas_w1_1_pins: pinmux-dallas-w1-1pins {
                                pinctrl-single,pins = < 
                                        BONE_P8_27 0x37
                                >;
                        };

                        dallas_w1_2_pins: pinmux-dallas-w1-2-pins {
                                pinctrl-single,pins = < 
                                        BONE_P8_28 0x37
                                >;
                        };
                };
        };
        fragment@2 {
                target-path="/";
                __overlay__ {

                        onewire2 {
                                status = "okay";
                                pinctrl-names = "default";
                                pinctrl-0 = <&dallas_w1_pins>;

                                compatible = "w1-gpio";
                                gpios = <&gpio2 22 GPIO_ACTIVE_HIGH>;
                        };
                };
        };

        fragment@3 {
                target-path="/";
                __overlay__ {

                        onewire3 {
                                status = "okay";
                                pinctrl-names = "default";
                                pinctrl-0 = <&dallas_w1_pins>;

                                compatible = "w1-gpio";
                                gpios = <&gpio2 24 GPIO_ACTIVE_HIGH>;
                        };
                };
        };
};

But when I try to compile, I get an error:

> dtc -O dtb -o BB-W1-P8.27_28-00A0.dtbo -b o -@ BB-W1-P8.27_28-00A0.dts
Error: BB-W1-P8.27_28-00A0.dts:16.1-9 syntax error
FATAL ERROR: Unable to parse input tree

Line 16:

#include <dt-bindings/board/am335x-bbw-bbb-base.h>
Maybe this are not existing on my BBB?

Thank you!

[Mark A. Yoder]

I think dtc doesn't do the preprocess of the include files.  The easiest way might be to follow the instructions here[1] to find the sources on your bone.  Put your new .dts file in with the sources in src/arm and run make.

--Mark

[1] https://elinux.org/EBC_Exercise_31_Dallas_1-Wire

[Fohnbit]

ok, thank you.

with this it will compiled, but after reboot, the BBB don´t boot and all 4 LED´s are on