Samsung S3C24XX Interrupt Controllers The S3C24XX SoCs contain a custom set of interrupt controllers providing a varying number of interrupt sources. The set consists of a main- and sub- controller and on newer SoCs even a second main controller. Required properties: - compatible: Compatible property value should be "samsung,s3c2410-irq" for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later. - reg: Physical base address of the controller and length of memory mapped region. - interrupt-controller : Identifies the node as an interrupt controller - #interrupt-cells : Specifies the number of cells needed to encode an interrupt source. The value shall be 4 and interrupt descriptor shall have the following format: ctrl_num contains the controller to use: - 0 ... main controller - 1 ... sub controller - 2 ... second main controller on s3c2416 and s3c2450 parent_irq contains the parent bit in the main controller and will be ignored in main controllers ctrl_irq contains the interrupt bit of the controller type contains the trigger type to use Example: interrupt-controller@4a000000 { compatible = "samsung,s3c2410-irq"; reg = <0x4a000000 0x100>; interrupt-controller; #interrupt-cells=<4>; }; [...] serial@50000000 { compatible = "samsung,s3c2410-uart"; reg = <0x50000000 0x4000>; interrupt-parent = <&subintc>; interrupts = <1 28 0 4>, <1 28 1 4>; }; rtc@57000000 { compatible = "samsung,s3c2410-rtc"; reg = <0x57000000 0x100>; interrupt-parent = <&intc>; interrupts = <0 30 0 3>, <0 8 0 3>; };