Configure GPIOs as inputs or outputs in device tree

[Sameer_Kelaskar]

Hi,

    We are using a customized board based on TQ-Systems i.MX8MPlus TQMa8MPxL - MBa8MPxL. Also we prepared the Yocto BSP Build procedure. And now we need to use some GPIOs available as inputs/outputs for our application.

    Following are some GPIOs that we intend to use some as inputs and some as outputs (either active high or active low), so how do we configure them? Any suggestions would be helpful.

[Sameer_Kelaskar]

Thank you @JorgeCas the problem for GPIOs was resolved. The numbering scheme for gpio banks in dts and that in the datasheet of i.MX8MP is different, and we had it corrected in our dts later.

But there is now an another query is that out of the 2 ethernet ports on-board only one works (i.e. interface shows in ifconfig result) while other does not. We are trying to change the existing "rgmii" PHY mode to "mii" so, accordingly how to make changes in the ethernet controller and corresponding iomux signals please let know.

[JorgeCas]

Got it @Sameer_Kelaskar, thank you for the feedback.

I suggest you open a new thread because it is a different topic.

Best regards.

[JorgeCas]

Hello, I hope you are doing well.

I suggest you check the next file:

How to use a GPIO in Linux on i.MX8*.

Best regards.