Hi,
How to enable all the GPIOs using below on Beaglebone
/sys/kernel/debug/pinctrl/44e10800.pinmux
check out beaglebone-universal-io by Charles Steinkuehler
https://github.com/cdsteinkuehler/beaglebone-universal-io
“Device tree overlay and support scripts for using most available hardware I/O on the BeagleBone without editing dts files or rebuilding the kernel”
Make sure you read the sections in the System Reference Manual about how the Beaglebone boots.
Specifically section 6.7.1 and section 8.1.1.
You must be careful to not load about 16 of the I/O lines until after the boot process is complete.
— Graham