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uboot imx8mp: add support for D18 / LEVY module

Marc-Oliver Westerburg requested to merge uboot-add-levy-d18-support into guf_imx_v2020.04-trizeps8plus_2021_12_07

This patch adds basic first support for SECO D18 / LEVY modules.

Current state:

  • Still works on Trizeps and MC3
  • Boots on D18 via USB and eMMC

Several things not working, yet:

  • baseboard.c / baseboard_pfids.c not yet adapted
  • no bootselect button / jumper, yet (will be added in separate US/MR)
  • no SW-based bootselect, yet (will be added in separate US/MR)

Note: This MR already includes a U-Boot device tree for D18, but for this DT to be included in the U-Boot FIT-Image a small modification to sources/meta-seconorth-machine/conf/machine/seco-mx8mp.conf is necessary to add seco-imx8mp-d18.dtb to the UBOOT_ADDITIONAL_DTB_NAMES variable. This change can only be made after this MR here has been merged as it would fail otherwise.

BCS-US: 746-001343

Edited by Marc-Oliver Westerburg

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