TQMa7x - YOCTO Linux BSP documentation

Using internal PCIe PHY clock is currently not supported by the Linux mainline and newer NXP vendor kernel. PCIe can not be used on MBa7x with these kernel versions.
asound.state is not compatible to older kernel versions. Use newer kernel - default is based on 6.6.y stable
USB Dual Role gadget: Causing a device disconnect is not possible. D+ is erroneously supplying VBUS as well preventing a device disconnect per software. Occurs when gadget is disabled again. USB host might fail to detect a new USB descriptor once gadget is restarted.
UBI / UBIFS images are enabled by default when using DISTRO=spaetzle. The generated rootfs size must not exceed the size defined by UBI_LEB_SIZE and UBI_MAX_LEB_COUNT on machine level. The distro definition and the image recipes tq-image-small-[debug] are intended for demonstration of howto generate a system running from SPI-NOR. This does not make any claims on feature / functional completeness.
U-Boot: USB dual role port (X5) is tested in U-Boot in peripheral mode only.
U-Boot: A POR might fail even if main power supply is disconnected, when running with USB dual role port (X5) connected to PC / HUB with powered VBUS.
Environment of U-Boot v2023.04 was reworked to use variable names that conforms with distroboot contract. The default environment of older U-Boot versions are incompatible.