On 10/18/2018 8:40 AM, Lokesh Vutla wrote:

TISCI abstracts the handling of IRQ routes where interrupt sources
are not directly connected to host interrupt controller. This series
adds support for:
- TISCI commands needed for IRQ configuration
- Interrupt Router(INTR) and Interrupt Aggregator(INTA) drivers

More information on TISCI IRQ management can be found here[1].
Complete TISCI resource management information can be found here[2].
AM65x SoC related TISCI information can be found here[3].
INTR and INTA related information can be found in TRM[4].

I didn't read the specs but from what you described in
INTA and INTR bindings, does the flow of IRQs like below ?

Device IRQ(e.g USB) -->INTR-->INTA--->HOST IRQ controller(GIC)

The confusing part is aggregator and can multiplex as well
as grouping but seems like its event grouping or multiplexing
than actual device IRQ grouping or multi-plexsing.

What am I missing ?

Regards,S
antosh