IBB Home Automation Cape - Device Tree Overlay (Rewrite for newer Linux versions)

DISCLAIMER: This repository is provided "as-is" for reference and personal use.

Building

Steps:

Clone this repository: https://github.com/beagleboard/BeagleBoard-DeviceTrees
Copy the .dtso source file into src/arm/overlays/
Run make -j4 all_arm

Installation

Steps:

Grab the .dtbo file built earlier from src/arm/overlays/
Copy it to /lib/firmware/

Required uEnv.txt Adjustments

To get the overlay to load correctly, the following options must be configured in your boot environment:

uboot_overlay_addr4=/lib/firmware/cape-bone-ibb-00A0.dtbo
enable_uboot_overlays=1
enable_uboot_cape_universal=0
cmdline=fsck.repair=yes earlycon coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100

Important: Disable and/or remove all options and cmdline entries referencing cape manager, universal capes, or other capes that are incompatible with this setup.

Verification

Check if the cape overlay was applied successfully by looking in: /proc/device-tree/chosen/overlays/
Run beagle-version to inspect any pinmux issue logs.

Reference /boot/uEnv.txt

Below is a minimal working example for reference. DO NOT blindly copy and paste this entire block into your system; use it strictly to verify your own parameters.

#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0

uname_r=6.18.8-bone18

###U-Boot Overlays###
###Master Enable
enable_uboot_overlays=1

###Additional custom capes
uboot_overlay_addr4=/lib/firmware/cape-bone-ibb-00A0.dtbo

###PRUSS OPTIONS
uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo

###Cape Universal Enable
enable_uboot_cape_universal=0
###U-Boot Overlays###

console=ttyS0,115200n8
cmdline=fsck.repair=yes earlycon coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100

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