Device tree board.xml file - VGA and AUDIO cores

I see this error has been resolved before. This doesn't require workaround necessarily. You can safely disregard the warning messages and proceed to compile your device tree sources normally.

See this KDB:

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Spurious Error Messages from sopc2dts

Description

When you are generating the device-tree source file (.dts) for an SoC HPS hardware design, you might see a large number of spurious error messages. The following list shows some of messages produced by sopc2dts:

sopc2dts --input soc_system.sopcinfo --output soc_system.dts --board

soc_system_board_info.xml

Failed to find h2f_lw_reset

Failed to find f2h_reset

Component hps_0 of class altera_hps is unknown

Component hps_0_fpga_interfaces of class altera_interface_generator is unknown

Component hps_0_hps_io of class altera_hps_io is unknown

Component hps_0_clk_0 of class hps_clk_src is unknown

Component hps_0 of class altera_hps is unknown

Component hps_0_fpga_interfaces of class altera_interface_generator is unknown

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DTAppend: Unable to find parent for compatible. Adding to root

DTAppend: Unable to find parent for leds. Adding to root

DTAppend: Unable to find parent for pmu0. Adding to root

Workaround/Fix

No workaround is necessary. You can safely disregard the warning messages and proceed to compile your device tree sources normally.

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https://www.intel.com/content/altera-www/global/en_us/index/support/support-resources/knowledge-base/solutions/fb127751.html

Please let me know if this answers your question.

Regards.