On Mon, Dec 1, 2014 at 8:09 AM, Jonas Gorski <jogo@xxxxxxxxxxx> wrote: > I'm not that firm in interrupt controller terminology, but can this be > a level 1 interrupt controller if it has a parent interrupt > controller? Isn't the parent the level 1 interrupt controller? Or > would the parent then be a level 0 interrupt controller? ;-) According to the register manual, this is an L1 controller and the "IRQ0" controller handled by irq-bcm7120-l2.c is an L2 controller. This terminology is used consistently across the MIPS and ARM STB chips, but it is worth noting that MIPS has a builtin "L0 controller" (not a published term) to demux the 5 HW IRQ lines, while ARM only uses a single IRQ input for peripherals. On STB MIPS platforms it is typical to only use one HW IRQ input per CPU (TP). Also note that brcm,bcm3384-l2-intc can either be used for an L1 (PERIPH INT block) or an L2/L3 (ZMIPS/CMIPS/IOP).
