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Documentation / devicetree / bindings / interrupt-controller / samsung,s3c24xx-irq.txt




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Based on kernel version 3.16. Page generated on 2014-08-06 21:37 EST.

1	Samsung S3C24XX Interrupt Controllers
2	
3	The S3C24XX SoCs contain a custom set of interrupt controllers providing a
4	varying number of interrupt sources. The set consists of a main- and sub-
5	controller and on newer SoCs even a second main controller.
6	
7	Required properties:
8	- compatible: Compatible property value should be "samsung,s3c2410-irq"
9	  for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later.
10	
11	- reg: Physical base address of the controller and length of memory mapped
12	  region.
13	
14	- interrupt-controller : Identifies the node as an interrupt controller
15	
16	- #interrupt-cells : Specifies the number of cells needed to encode an
17	  interrupt source. The value shall be 4 and interrupt descriptor shall
18	  have the following format:
19	      <ctrl_num parent_irq ctrl_irq type>
20	
21	  ctrl_num contains the controller to use:
22	      - 0 ... main controller
23	      - 1 ... sub controller
24	      - 2 ... second main controller on s3c2416 and s3c2450
25	  parent_irq contains the parent bit in the main controller and will be
26	             ignored in main controllers
27	  ctrl_irq contains the interrupt bit of the controller
28	  type contains the trigger type to use
29	
30	Example:
31	
32		interrupt-controller@4a000000 {
33			compatible = "samsung,s3c2410-irq";
34			reg = <0x4a000000 0x100>;
35			interrupt-controller;
36			#interrupt-cells=<4>;
37		};
38	
39		[...]
40	
41		serial@50000000 {
42			compatible = "samsung,s3c2410-uart";
43			reg = <0x50000000 0x4000>;
44			interrupt-parent = <&subintc>;
45			interrupts = <1 28 0 4>, <1 28 1 4>;
46		};
47	
48		rtc@57000000 {
49			compatible = "samsung,s3c2410-rtc";
50			reg = <0x57000000 0x100>;
51			interrupt-parent = <&intc>;
52			interrupts = <0 30 0 3>, <0 8 0 3>;
53		};
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