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-Broadcom BCM6345-style Level 1 interrupt controller
-
-This block is a first level interrupt controller that is typically connected
-directly to one of the HW INT lines on each CPU.
-
-Key elements of the hardware design include:
-
-- 32, 64 or 128 incoming level IRQ lines
-
-- Most onchip peripherals are wired directly to an L1 input
-
-- A separate instance of the register set for each CPU, allowing individual
- peripheral IRQs to be routed to any CPU
-
-- Contains one or more enable/status word pairs per CPU
-
-- No atomic set/clear operations
-
-- No polarity/level/edge settings
-
-- No FIFO or priority encoder logic; software is expected to read all
- 2-4 status words to determine which IRQs are pending
-
-Required properties:
-
-- compatible: should be "brcm,bcm<soc>-l1-intc", "brcm,bcm6345-l1-intc"
-- reg: specifies the base physical address and size of the registers;
- the number of supported IRQs is inferred from the size argument
-- interrupt-controller: identifies the node as an interrupt controller
-- #interrupt-cells: specifies the number of cells needed to encode an interrupt
- source, should be 1.
-- interrupts: specifies the interrupt line(s) in the interrupt-parent controller
- node; valid values depend on the type of parent interrupt controller
-
-If multiple reg ranges and interrupt-parent entries are present on an SMP
-system, the driver will allow IRQ SMP affinity to be set up through the
-/proc/irq/ interface. In the simplest possible configuration, only one
-reg range and one interrupt-parent is needed.
-
-The driver operates in native CPU endian by default, there is no support for
-specifying an alternative endianness.
-
-Example:
-
-periph_intc: interrupt-controller@10000000 {
- compatible = "brcm,bcm63168-l1-intc", "brcm,bcm6345-l1-intc";
- reg = <0x10000020 0x20>,
- <0x10000040 0x20>;
-
- interrupt-controller;
- #interrupt-cells = <1>;
-
- interrupt-parent = <&cpu_intc>;
- interrupts = <2>, <3>;
-};