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===========================================
C-SKY Multi-processors Interrupt Controller
===========================================
C-SKY Multi-processors Interrupt Controller is designed for ck807/ck810/ck860
SMP soc, and it also could be used in non-SMP system.
Interrupt number definition:
0-15 : software irq, and we use 15 as our IPI_IRQ.
16-31 : private irq, and we use 16 as the co-processor timer.
31-1024: common irq for soc ip.
Interrupt triger mode: (Defined in dt-bindings/interrupt-controller/irq.h)
IRQ_TYPE_LEVEL_HIGH (default)
IRQ_TYPE_LEVEL_LOW
IRQ_TYPE_EDGE_RISING
IRQ_TYPE_EDGE_FALLING
=============================
intc node bindings definition
=============================
Description: Describes SMP interrupt controller
PROPERTIES
- compatible
Usage: required
Value type: <string>
Definition: must be "csky,mpintc"
- #interrupt-cells
Usage: required
Value type: <u32>
Definition: <2>
- interrupt-controller:
Usage: required
Examples: ("interrupts = <irq_num IRQ_TYPE_XXX>")
---------
#include <dt-bindings/interrupt-controller/irq.h>
intc: interrupt-controller {
compatible = "csky,mpintc";
#interrupt-cells = <2>;
interrupt-controller;
};
device: device-example {
...
interrupts = <34 IRQ_TYPE_EDGE_RISING>;
interrupt-parent = <&intc>;
};
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