GPIOs on DIMM-RZ/A1H under Linux

Please see the following table for the translation from baseboard pin to CPU pin:

Under Linux you can use sysfs to access gpios.

To get access to an GPIO pin, first, write the GPIO number to /sys/class/gpio/export

echo 83 [gt] /sys/class/gpio/export

Now you should find a directory in /sys/class/gpio to access your GPIO pin. Write ‚in‘ or ‚out‘ to the direction to change the direction of the pin:

echo out [gt] /sys/class/gpio/GPIO0/direction

The value (0 for off, 1 for on) of the pin is in the value file. To read or change it, read the file or write to it.

echo 1 [gt] /sys/class/gpio/GPIO0/value

cat /sys/class/gpio/GPIO0/value

The list of GPIO numbers can be found below.

Verno 3/Verno 4/Cadun

There are 10 GPIOs on J12 with a signal level of 3.3V and 14 more on J16 via an GPIO expander.

Connector	Pin	Signal	Signal on RZ/A1H	Port and pin	GPIO Number
J12	4	GPIO_0	GPIO0	6-3	83
J12	6	GPIO_1	GPIO1	6-4	84
J12	8	GPIO_2	GPIO2	4-0	54
J12	10	GPIO_3	GPIO3	4-1	55
J12	12	GPIO_4	GPIO4	4-2	56
J12	14	GPIO_5	GPIO5	4-3	57
J12	16	GPIO_6	GPIO6	11-12	165
J12	18	GPIO_7	GPIO7	11-13	166
J12	20	GPIO_8	GPIO8	11-14	167
J12	22	GPIO_9	GPIO9	11-15	168