Linux/AM5728: Device tree change for new LCD

Part Number:AM5728

Tool/software: Linux

Hi,

I'm about to connect a WSVGA display to the AM572x development platform, which is different from the LCD shipped with the package. I understood that the device tree needs to be changed. I did the following steps:

1. Changed am57xx-evm-common.dtsi default display settings to the new resolution/timings and also changed backlight PWM from EHRPWM1 to EHRPWM2.
2. Compiled the device tree (make linux-dtbs)
3. Investigated, that loader chooses device tree file am57xx-evm-es2plus.dtb during startup (links to devicetree-zImage-am57xx-evm-es2plus.dtb)
4. As there is no such file name after device tree compilation I took the newly created am57xx-evm-reva3.dtb and overwrote devicetree-zImage-am57xx-evm-es2plus.dtb on the sdcard.
5. When trying to boot with this dtb the boot process stucks (last line: "Starting kernel...")

Can you help me doing the changes to support the new LCD including brightness control?

Thanks,
Lars