Hello Support!
After almost a week of struggling we would like to ask your help with the following problem:
Environment:
- Apalis TK1
- running L4T image Tezi_21.7-2.8b6. This is a old ubuntu 14.04 taken from your website.
-BSP 2.8
Ubuntu GNOME Desktop Environment Based on NVIDIA L4T
We require this specific OS because we need LVDS support on TK1 - Custom board with custom GPIO pinout
Problem: while attempting to configure custom GPIO pins faced the misunderstanding / lack of documentation for specific task.
What was done:
- Understand that old L4T under BSP 2.8 does not support #gpiod to control pins we had to choose sysfs as the only option available. Obviously that pins which we need on TK1 are not configured by default so we need to perform device tree configuration.
- Environment for uBoot and Kernel compilation successfully set followed by your article.
- Device tree .dtb file: tegra124-apalis-v1.2-eval.dtb compiled with required for our custom GPIO settings.
- While attempting to get this file to TK1 board we found that in /boot folder of TK1 board there are many .dtb files already but no one of them has a name tegra124-apalis-v1.2-eval.dtb
Understand that this is probably because this TK1 board is configured for different carrier board.
So the problem is: How to figure which of .dtb is used on TK1 at boot ?
There is no set env or getenv command in TK1 L4T Linux. There is however busybox where env command is available. However when pooling env from TK1 we unable to see the reference to carrier board type and .dtb name which is in use.
Please explain as for dummies How to find out which .dtb is in use by TK1 at boot? How to see this particular setting, where to see it, how to change it ? Step by step please.
I understand that I likely can try to manually recompile other .dtb files and try to find the correct one to use but this is nor a right aproach.
The .dtb files which we have in our /boot folder are: (keep in mind that we are under BSP 2.8 with old ubuntu)
extlinux
tegra124-jetson_tk1-pm375-000-c00-00.dtb
tegra124-tn8-e1780-1100-a03-01-battery.dtb
tegra124-ardbeg-a03-00.dtb
tegra124-jetson_tk1-pm375-000-c00-00.old
tegra124-tn8-e1780-1100-a03-01.dtb
tegra124-ardbeg.dtb
tegra124-laguna.dtb
tegra124-tn8-e1780-1100-a03-battery.dtb
tegra124-ardbeg-e1780-1000-a00-00-battery.dtb
tegra124-laguna-pm358.dtb
tegra124-tn8-e1780-1100-a03.dtb
tegra124-ardbeg-e1780-1000-a00-00.dtb
tegra124-loki-02-cell-battery.dtb
tegra124-tn8-e1784-1100-a00.dtb
tegra124-ardbeg-e1780-1000-a00-01.dtb
tegra124-loki-03-cell-battery.dtb
tegra124-tn8-e1784-1101-a00-battery.dtb
tegra124-ardbeg-e1780-1000-a03-00-battery.dtb
tegra124-loki.dtb
tegra124-tn8-e1784-1101-a00.dtb
tegra124-ardbeg-e1780-1000-a03-00.dtb
tegra124-loki-e2530-a01.dtb
tegra124-tn8-e1922-1100-a00.dtb
tegra124-ardbeg-e1780-1000-a03-00-powerconfig.dtb
tegra124-loki-e2530-a03.dtb
tegra124-tn8-p1761-1270-a00-battery.dtb
tegra124-ardbeg-e1780-1000-a03-00-sata.dtb
tegra124-loki-e2548-a00.dtb
tegra124-tn8-p1761-1270-a00.dtb
tegra124-ardbeg-e1780-1000-a03-01.dtb
tegra124-loki-mods.dtb
tegra124-tn8-p1761-1270-a02-battery.dtb
tegra124-ardbeg-e1792-1100-a00-00.dtb
tegra124-loki-thor195-e2549-a00.dtb
tegra124-tn8-p1761-1270-a02.dtb
tegra124-ardbeg-e1792-1100-a00-01.dtb
tegra124-norrin.dtb
tegra124-tn8-p1761-1270-a03-battery.dtb
tegra124-ardbeg-vcm30-t124.dtb
tegra124-norrin-pm374-0001-a00-00.dtb
tegra124-tn8-p1761-1270-a03.dtb
tegra124-bonaire.dtb
tegra124-norrin-pm374-0001-a01-00.dtb
tegra124-tn8-p1761-1470-a00-battery.dtb
tegra124-bonaire_sim.dtb
tegra124-p2360.dtb
tegra124-tn8-p1761-1470-a00.dtb
tegra124-e1782_sku1100.dtb
tegra124-thor195.dtb
tegra124-vcm30_t124.dtb
tegra124-e1791.dtb
tegra124-tn8-e1780-1100-a02-01.dtb
zImage
tegra124-e1923.dtb
tegra124-tn8-e1780-1100-a02-battery.dtb
tegra124-foster.dtb
Thank you !