Forum Post: RE: Pin mux on beaglebone before device tree is read

Thanks Biser, it clarifies a little but in the reference manual it says (9.1):

"For writing to the control module registers, the MPU will need to be in privileged mode of operation
and writes will not work from user mode"

How can we access "privileged mode of operation" and write to the desired registers?

thanks for the help

fabricio