This is a list of the GPIOs available on conga-QMX6:

Q7 name	Q7 connector	schematic name	type	resistor	OS numbering/naming	startup code numbering/naming	comment
GPIO0	Q7-185	GPIO5_2	push-pull	internal 100k PU	gpio130	GPIO5_2
GPIO1	Q7-186	USB_OTG_PWR_CTL_WAKE (rev.E)	push-pull	internal 100k PU	gpio8 (rev.E), gpio86 (rev.B/C)	GPIO1_8 (rev.E) GPIO3_22 (rev.B/C)	rev.E: not used as gpio (is usb-otg-pwr)
GPIO2	Q7-187	GPIO_26	push-pull	internal 100k PU	gpio122	GPIO4_26
GPIO4 / (GPO1)	Q7-189	GPIO_0	push-pull	internal 100k PD	gpio0	GPIO1_0
GPIO5 / (GPI)	Q7-190	GPIO_15	push-pull	internal 100k PD	gpio111	GPIO4_15	Attention: This pin has pulldown enabled on coldstart and even without any bootloader software. It is not set to pullup in startup code to prevent pin toggling from low to high in the first 100ms of boot.
GPIO6 / (GPIO4)	Q7-191	GPIO_16	push-pull	internal 100k PU	gpio203	GPIO7_11	on conga-QMX6 Q7 interface this is named GPIO4
GPIO7 / (GPO0)	Q7-192	GPIO_14	push-pull	internal 100k PU	gpio110	GPIO4_14

How to access the GPIOS from OS

GPIO pins are already configured from current Kirkstone BSP as GPIOs. Check via sysfs:

root@cgtqmx6:~# cd /sys/class/gpio
root@cgtqmx6:/sys/class/gpio# ls 
export  gpio110  gpio122  gpio130  gpiochip0    gpiochip160  gpiochip32  gpiochip96
gpio0   gpio111  gpio123  gpio203  gpiochip128  gpiochip192  gpiochip64  unexport

All aready configured gpios are lited here. If a GPIO is not yet configured, enable it like e.g. for GPIO0:

$ echo gpio130 > /sys/class/gpio/export

Example: set gpio0 as output and switch between high and low:

$ echo out > /sys/class/gpio/gpio130/direction

$ echo 1 > /sys/class/gpio/gpio130 /value

$ echo 0 > /sys/class/gpio/gpio130 /value

Example: set gpio0 as input:

$ echo in > /sys/class/gpio/gpio130/direction

$ cat /sys/class/gpio/gpio130/value

How to access the GPIOs from startup code

Example for gpio0:

==> gpio set GPIO5_2

==> gpio clear GPIO5_2