1 MIPS CPU interrupt controller
3 On MIPS the mips_cpu_irq_of_init() helper can be used to initialize the 8 CPU
4 IRQs from a devicetree file and create a irq_domain for IRQ controller.
6 With the irq_domain in place we can describe how the 8 IRQs are wired to the
7 platforms internal interrupt controller cascade.
9 Below is an example of a platform describing the cascade inside the devicetree
10 and the code used to load it inside arch_init_irq().
13 - compatible : Should be "mti,cpu-interrupt-controller"
20 #interrupt-cells = <1>;
22 compatible = "mti,cpu-interrupt-controller";
26 compatible = "ralink,rt2880-intc";
30 #interrupt-cells = <1>;
32 interrupt-parent = <&cpu-irq>;
37 Example platform irq.c:
38 static struct of_device_id __initdata of_irq_ids[] = {
39 { .compatible = "mti,cpu-interrupt-controller", .data = mips_cpu_irq_of_init },
40 { .compatible = "ralink,rt2880-intc", .data = intc_of_init },
44 void __init arch_init_irq(void)
46 of_irq_init(of_irq_ids);