imx8qxp M4: How to use flexspi pins as normal GPIO

[relax-wu]

Hi

SDK：Android Q10.0.0_2.2.0_AUTO
app：android_build/vendor/nxp/mcu-sdk-auto/SDK_MEK-MIMX8QX/boards/mekmimx8qx/demo_apps/rear_view_camera/

I tried to do it but failed.

Please see the link below for specific operations：
https://community.nxp.com/t5/i-MX-Processors/Imx8qxp-M4-GPIO-PinInit-failed/td-p/1262520

[relax-wu · Accepted solution]

Ready to use, need to modify

vendor/nxp/fsl-proprietary/uboot-firmware/imx8q_car/board-imx8qxp.c

BRD_ERR(rm_set_resource_movable(pt_boot, SC_R_GPIO_3,
    SC_R_GPIO_3, SC_TRUE));

Then add before GPIO_PinInit

err = sc_pm_set_resource_power_mode(ipc, SC_R_GPIO_3, SC_PM_PW_MODE_ON);
if (SC_ERR_NONE != err)
{
    assert(false);
}

But there will be a problem. All pins of GPIO3 will be allocated to M4, and core A cannot be used.