imx8mq gpio operation

[gaobo]

MACHINE=imx8mqevk

BSP=4.14.78

Hi everybody,I want to operate GPIO by mapping，but I didn't find data register and direction register in the chip manua.

So I would like to ask how to operate a GPIO, such as changing the level.

We want to introduce some pins on our products, similar to raspberryPi,then port raspberryPi gpio lib to imx8mq.

please give me some advises,thanks!

[igorpadykov]

Hi gao

for i.MX8MQ gpio usage one can look at

http://variwiki.com/index.php?title=DART-MX8M_GPIO 

Best regards
igor
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[gaobo]

Hi igorpadykov:

Firstly thanks for your replay. But what i want to say is that use mmap function to solve it.Similar to bare board development. 

but i not find Correlation register!

thanks!!!

[igorpadykov]

one can look at linux gpio driver:

gpio-mxc.c\gpio\drivers - linux-imx - i.MX Linux kernel 

Best regards
igor