3.2. Device Tree Overlay Support¶
This application note contains steps to configure Device Tree Overlays (DTBO). DTBOs can be enabled from U-Boot when extra peripherals are connected to the board.
DTBOs are board specific.
It’s possible to change the dtbo_index from the U-Boot shell.
For example:
env set dtbo_index 1
saveenv
reset
To enable multiple DTBOs, pass a space-separated index list. For example:
env set dtbo_index '1 2'
- AM62x-SK EVM
The following Device-Tree Overlays are supported:
| dtbo_index | description |
| 0 | HDMI audio output (bridge by shorting a (J24) header on the board.) |
| 1 | Digilent PCam 5C OV5640 Camera |
| 2 | TEVI-OV5640C-S84-IR-RPI Camera |
| 3 | Microtips Technology USA 10.1” WUXGA (1920x1200) OLDI panel |
| 4 | Enable MAIN and MCU GPIO + CANUART wakeup source |
Warning
LVDS Display is supported only on E3 board revision.
- AM62x-LP-SK EVM
The following Device-Tree Overlays are supported:
| dtbo_index | description |
| 5 | Microtips Technology USA 10.1” WUXGA (1920x1200) OLDI panel |
- Beagle Play
| dtbo_index | description |
| 6 | Digilent PCam 5C OV5640 Camera |
| 7 | TEVI-OV5640C-S84-IR-RPI Camera |
| 8 | Lincoln Technology Solutions LCD185-101CT WUXGA(1920x1200) OLDI panel |