1 =========================================== 1 ===========================================
2 C-SKY Multi-processors Interrupt Controller 2 C-SKY Multi-processors Interrupt Controller
3 =========================================== 3 ===========================================
4 4
5 C-SKY Multi-processors Interrupt Controller is 5 C-SKY Multi-processors Interrupt Controller is designed for ck807/ck810/ck860
6 SMP soc, and it also could be used in non-SMP 6 SMP soc, and it also could be used in non-SMP system.
7 7
8 Interrupt number definition: 8 Interrupt number definition:
9 0-15 : software irq, and we use 15 as our I 9 0-15 : software irq, and we use 15 as our IPI_IRQ.
10 16-31 : private irq, and we use 16 as the c 10 16-31 : private irq, and we use 16 as the co-processor timer.
11 31-1024: common irq for soc ip. 11 31-1024: common irq for soc ip.
12 12
13 Interrupt trigger mode: (Defined in dt-binding !! 13 Interrupt triger mode: (Defined in dt-bindings/interrupt-controller/irq.h)
14 IRQ_TYPE_LEVEL_HIGH (default) 14 IRQ_TYPE_LEVEL_HIGH (default)
15 IRQ_TYPE_LEVEL_LOW 15 IRQ_TYPE_LEVEL_LOW
16 IRQ_TYPE_EDGE_RISING 16 IRQ_TYPE_EDGE_RISING
17 IRQ_TYPE_EDGE_FALLING 17 IRQ_TYPE_EDGE_FALLING
18 18
19 ============================= 19 =============================
20 intc node bindings definition 20 intc node bindings definition
21 ============================= 21 =============================
22 22
23 Description: Describes SMP interrupt c 23 Description: Describes SMP interrupt controller
24 24
25 PROPERTIES 25 PROPERTIES
26 26
27 - compatible 27 - compatible
28 Usage: required 28 Usage: required
29 Value type: <string> 29 Value type: <string>
30 Definition: must be "csky,mpin 30 Definition: must be "csky,mpintc"
31 - #interrupt-cells 31 - #interrupt-cells
32 Usage: required 32 Usage: required
33 Value type: <u32> 33 Value type: <u32>
34 Definition: <2> 34 Definition: <2>
35 - interrupt-controller: 35 - interrupt-controller:
36 Usage: required 36 Usage: required
37 37
38 Examples: ("interrupts = <irq_num IRQ_TYPE_XXX 38 Examples: ("interrupts = <irq_num IRQ_TYPE_XXX>")
39 --------- 39 ---------
40 #include <dt-bindings/interrupt-controller/irq 40 #include <dt-bindings/interrupt-controller/irq.h>
41 41
42 intc: interrupt-controller { 42 intc: interrupt-controller {
43 compatible = "csky,mpintc"; 43 compatible = "csky,mpintc";
44 #interrupt-cells = <2>; 44 #interrupt-cells = <2>;
45 interrupt-controller; 45 interrupt-controller;
46 }; 46 };
47 47
48 device: device-example { 48 device: device-example {
49 ... 49 ...
50 interrupts = <34 IRQ_TYPE_EDGE 50 interrupts = <34 IRQ_TYPE_EDGE_RISING>;
51 interrupt-parent = <&intc>; 51 interrupt-parent = <&intc>;
52 }; 52 };
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