1 * ARM Versatile FPGA interrupt controller
3 One or more FPGA IRQ controllers can be synthesized in an ARM reference board
4 such as the Integrator or Versatile family. The output of these different
5 controllers are OR:ed together and fed to the CPU tile's IRQ input. Each
6 instance can handle up to 32 interrupts.
9 - compatible: "arm,versatile-fpga-irq"
10 - interrupt-controller: Identifies the node as an interrupt controller
11 - #interrupt-cells: The number of cells to define the interrupts. Must be 1
12 as the FPGA IRQ controller has no configuration options for interrupt
13 sources. The cell is a u32 and defines the interrupt number.
14 - reg: The register bank for the FPGA interrupt controller.
15 - clear-mask: a u32 number representing the mask written to clear all IRQs
16 on the controller at boot for example.
17 - valid-mask: a u32 number representing a bit mask determining which of
18 the interrupts are valid. Unconnected/unused lines are set to 0, and
19 the system till not make it possible for devices to request these
25 compatible = "arm,versatile-fpga-irq";
26 #interrupt-cells = <1>;
28 reg = <0x14000000 0x100>;
29 clear-mask = <0xffffffff>;
30 valid-mask = <0x003fffff>;