# 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.

```text
#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