How to calculate the Linux GPIO number for a certain GPIO pin on i.MX8MQ platform

[KyleChang]

How to calculate the Linux GPIO number for a certain GPIO pin on i.MX8MQ platform?

For example, i.MX8MQ GPIO3_IO4=> What is GPIO number that I can export the GPIO and control pin direction and value, thanks.

[KyleChang]

Thank you.

[Harvey021]

Hi @KyleChang 

To i.MX8MQ GPIO3_IO4: (3 - 1) * 32 + 4 = 68.

Best regards

Harvey