We are using buildroot-fsimx8x-B2020.09-pre on our Hardware and trying now to control GPIOs.
I have received new document for GPIOs on iMX8 (efusMX8X-GPIO-ReferenceCard_eng.pdf) and tried to control GPIOs the same way as iMX6. with new gpio numbers there is no error anymore but no change on status of GPIOs as well.
following is the example of how I try to control SPI_B_MOSI:
Can you please advise me if I missed something and why it is not still working.