forked from vincent.schweiger/beaglebone-ibb-cape
58 lines
1.9 KiB
Markdown
58 lines
1.9 KiB
Markdown
# IBB Home Automation Cape - Device Tree Overlay (Rewrite for newer Linux versions)
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> **DISCLAIMER:** This repository is provided "as-is" for reference and personal use.
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## Building
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Steps:
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* Clone this repository: `https://github.com/beagleboard/BeagleBoard-DeviceTrees`
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* Copy the `.dtso` source file into `src/arm/overlays/`
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* Run `make -j4 all_arm`
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## Installation
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Steps:
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* Grab the `.dtbo` file built earlier from `src/arm/overlays/`
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* Copy it to `/lib/firmware/`
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### Required uEnv.txt Adjustments
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To get the overlay to load correctly, the following options must be configured in your boot environment:
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* `uboot_overlay_addr4=/lib/firmware/cape-bone-ibb-00A0.dtbo`
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* `enable_uboot_overlays=1`
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* `enable_uboot_cape_universal=0`
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* `cmdline=fsck.repair=yes earlycon coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100`
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**Important:** Disable and/or remove all options and cmdline entries referencing cape manager, universal capes, or other capes that are incompatible with this setup.
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### Verification
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* Check if the cape overlay was applied successfully by looking in: `/proc/device-tree/chosen/overlays/`
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* Run `beagle-version` to inspect any pinmux issue logs.
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---
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### Reference /boot/uEnv.txt
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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.
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```text
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#Docs: http://elinux.org/Beagleboard:U-boot_partitioning_layout_2.0
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uname_r=6.18.8-bone18
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###U-Boot Overlays###
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###Master Enable
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enable_uboot_overlays=1
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###Additional custom capes
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uboot_overlay_addr4=/lib/firmware/cape-bone-ibb-00A0.dtbo
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###PRUSS OPTIONS
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uboot_overlay_pru=AM335X-PRU-UIO-00A0.dtbo
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###Cape Universal Enable
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enable_uboot_cape_universal=0
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###U-Boot Overlays###
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console=ttyS0,115200n8
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cmdline=fsck.repair=yes earlycon coherent_pool=1M net.ifnames=0 lpj=1990656 rng_core.default_quality=100
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