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imx8qm IRQSTEER interrupt mapping

Question asked by Thierry Durand on Jun 7, 2020
Latest reply on Jun 9, 2020 by igorpadykov

Hi all,

I'm confused about how the interrupt sources are mapped to the IRQSTEER. Here is a use case to illustrate:

I want the M4_0 to use LSIO GPT_4. The interrupt ID of GPT_4 is 167. I could experimentally figure out that this interrupt source #167 is routed to IRQSTEER_1 and becomes vector 33 to the M4 core. But how I derive 33 from 167?

I'd appreciate it if someone could elaborate on the process or point me to relevant documentation.

Thanking you in advance,