Hi Marc, On 2/12/2019 1:12 PM, Lokesh Vutla wrote: > TI AM65x SoC based on K3 architecture introduced support for Events > which are message based interrupts with minimal latency. These events > are not compatible with regular interrupts and are valid only through > an event transport lane. An Interrupt Aggregator(INTA) is introduced > to convert these events to interrupts. INTA can also group 64 events > into a single interrupt. Now the SoC has many peripherals and a large > number of event sources (time sync or DMA), the use of events is > completely dependent on a user's specific application, which drives a > need for maximum flexibility in which event sources are used in the > system. It is also completely up to software control as to how the > events are serviced. > > Because of the huge flexibility there are certain standard peripherals > (like GPIO etc)where all interrupts cannot be directly corrected to host > interrupt controller. For this purpose, Interrupt Router(INTR) is > introduced in the SoC. INTR just does a classic interrupt redirection. > > So the SoC has 3 types of interrupt controllers: > - GIC500 > - Interrupt Router > - Interrupt Aggregator > > Below is a diagrammatic view of how SoC integration of these interrupt > controllers:(https://pastebin.ubuntu.com/p/9ngV3jdGj2/) > > Device Index-x Device Index-y > | | > | | > .... > \ / > \ / > \ (global events) / > +---------------------------+ +---------+ > | | | | > | INTA | | GPIO | > | | | | > +---------------------------+ +---------+ > | (vint) | > | | > \|/ | > +---------------------------+ | > | |<-------+ > | INTR | > | | > +---------------------------+ > | > | > \|/ (gic irq) > +---------------------------+ > | | > | GIC | > | | > +---------------------------+ > > While at it, TISCI abstracts the handling of all above IRQ routes where > interrupt sources are not directly connected to host interrupt controller. > That would be configuration of Interrupt Aggregator and Interrupt Router. > > This series adds support for: > - TISCI commands needed for IRQ configuration > - Interrupt Router(INTR) and Interrupt Aggregator(INTA) drivers Sorry to bother you again. Any chance you can take a quick look at the series? Thanks and regards, Lokesh
