TQMa8Xx - YOCTO Linux BSP documentation

Known Issues

Known Issues BSPs

Known Issues scarthgap.TQ.ARM.BSP.0006

  • Default setting for fdt_file in u-boot does not match older linux kernel naming scheme. Current naming scheme is <cpu>-<som>-<baseboard>[-feature].dtb, old scheme was <cpu>-<baseboard>[-feature].dtb. See Build Artifacts for complete list of supported Device Tree files
  • USB
    • U-Boot: USB 2.0 dual role port is limited to device mode for UUU / MFG use case
    • U-Boot: USB 3.0 port does not initialize USB 2.0 subsystem after USB reset
  • SPI: Hardware-controlled chipselects are not driven as expected
    • Toggle after each Byte when using DMA
    • Inbetween each spi_transfer
    • Use of GPIO controlled chip-selects instead is recommended
    • By default chip-selects are configured as GPIO, if possible (see below)
    • Note for MBa8Xx: The following pin cannot be configured as GPIO:
      • SPI3_CS1 on pad SPI3_CS1 ** UBI / UBIFS images are enabled by default when using DISTRO=spaetzle[-nxp]. The generated rootfs size must not exceed the size defined by UBI_LEB_SIZE and UBI_MAX_LEB_COUNT on machine level.