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[IMX8MM][MYON2][DTB] Add the ConXM Carrier board overlay

Oleksii Kutuzov requested to merge oleksii/split-myon2-device-tree into seco_lf-5.10.y

Changes: seco-imx8mm-myon2-conxm-hdmi.dtb was split into:

  • seco-imx8mm-myon2.dtb
  • seco-imx8mm-myon2-conxm-overlay.dtbo
  • seco-imx8mm-myon2-conxm-hdmi-overlay.dtbo

two "standard" configurations of ConXM are:

  • With HDMI (MIPI-HDMI bridge on ConXM)
  • With LVDS (MIPI-LVDS bridge Myon 2)
    both can be separately enabled with overlays. Otherwise headless.

Myon 2 device tree changes:

  • Removed USB related ifdefs (host mode by default)
  • Removed PCIE_Wake# gpio-key (there's no such key, PCIe isn't even used by default with ConXM)
  • PCIe disabled in the module DT (was causing deadlock when enabled)
  • SAI disabled in the module DT (needs to be enabled in the carrier overlay if needed)
  • USB1 disabled in the module DT (needs to be enabled in the carrier overlay if needed)
  • MicroSD disabled in the module DT (needs to be enabled in the carrier overlay if needed)

ConXM overlay, ConXM-HDMI overlay were tested.

Edited by Oleksii Kutuzov

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