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Altera_Forum
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10 years ago

Altera JTAG UART used by kernel does not match IRQ assignment made in Qsys

Hi all, I'm currently developing a 3.10.31-ltsi kernel that running on a Nios II-based system. This system also contains several components including an Altera JTAG UART, USB host controller a...
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Altera_Forum
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10 years ago

Hello Brad,

Based on our primary testing, it looks like Linux v 3.10 reserves virtual IRQ 0 for some internal use. Hence if some item has assigned Hardware IRQ 0, it would be mapped to virtual IRQ 1. So driver should use Virtual IRQ assigned to it instead of Hardware IRQ numbers.

Thanks,

Bhaumik