I removed the gpio bank 2, 6 and 7 from the device tree. System boots and works fine, but on boot the OS throws a warning:
[FAILED] Failed to start Load default USB gadget schema g1.schema.
See 'systemctl status usbg.service' for details.
The USB devices are still working. Is this something to be worry about? What did I just break?
If you’re not using any USB gadget functionality (i.e. USB client), this should not be an issue. You can disable
usbg.service and the warning will go away.
From what I recall from the top of my head and without any further details, you might have disabled a GPIO related to the USB client node on the device tree.
I intend to use an USB camera, will that be an issue? Or will I just lose the ability to turn the device on and off?
This message was appearing before your changes? Or started to appear only after them?
First, I suggest you look over the related device-trees in order to identify nodes that would be using the removed gpio-banks. Then, I recommend you disable them if you don’t have plans to use them.
Are you required to use USB-OTG on your project?
The message started appearing after I disabled the GPIO6, I believe.
Should I look for nodes that use the same SODIMMs or just the same pins as GPIO?
The USB-OTG is not predicted to be used;
Not at all. When using a USB camera, Linux acts as USB host, so the non-working USB Gadget service won’t affect this.
Nonetheless, make sure to try this camera anyway to validate USB host functionality.