Linux/BEAGLEBK: GPIO keys configuration

Part Number: BEAGLEBK
Other Parts Discussed in Thread: DRA75

Tool/software: Linux

Hi,

I am quite new into device-tree, and I still have lacks of understanding it entirely.

I have the arago build already. I enabled the gpio_keys module and a cp2112 module of USB/i2C driver. The cp2112
exposes the device as /dev/i2c-X and the on-board gpio's as /dev/gpiochip4 and  /sys/class/gpio/gpio/gpio (504 .. 511), when exported.

root@am335x-evm:/sys/class/gpio/gpio508# cat value 
1
root@am335x-evm:/sys/class/gpio/gpio508# cat value 
0

cat /sys/kernel/debug/gpio
gpiochip0: GPIOs 0-31, parent: platform/44e07000.gpio, gpio:
 gpio-6   (                    |cd                  ) in  lo IRQ

gpiochip1: GPIOs 32-63, parent: platform/4804c000.gpio, gpio:
 gpio-53  (                    |beaglebone:green:hea) out lo    
 gpio-54  (                    |beaglebone:green:mmc) out lo    
 gpio-55  (                    |beaglebone:green:usr) out hi    
 gpio-56  (                    |beaglebone:green:usr) out lo    

gpiochip2: GPIOs 64-95, parent: platform/481ac000.gpio, gpio:

gpiochip3: GPIOs 96-127, parent: platform/481ae000.gpio, gpio:

gpiochip4: GPIOs 504-511, parent: hid/0003:10C4:EA90.0001, cp2112_gpio, can sleep:
 gpio-508 (                    |sysfs               ) in  hi    

I can read the value from all using the sys filesystem. I have to add them as KEY_EVENTS.

Also they are shown as:   gpiochip4: GPIOs 504-511, parent: hid/0003:10C4:EA90.0001, cp2112_gpio, can sleep

ON which dts file I have to add, or if I am using a totally new one just for the purpose of the keys, where I should look.
I've seen samples but they are using PX  rail names and using unexistent am335x-bbw-bbb-base.h

Thank you.