4.2. 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.
Attention
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'
When using the the experimental 2024.04 U-Boot set the adtbo_idx variable instead:
=> env set adtbo_idx 1
=> saveenv
=> reset
Warning
With the experimental 2024.04 U-Boot, multiple DTBOs are not supported.
The following Device-Tree Overlays are supported:
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 |
11 |
M.2-CC3301 WiFi board on the M.2 connector |
13 |
WL1837 on-board WiFi for AM62X rev 1,2,3 |
Warning
On AM62x-SK EVM, LVDS Display is supported only on E3 board revision.
Index |
Description |
|---|---|
5 |
Microtips Technology USA 10.1” WUXGA (1920x1200) OLDI panel |
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 |