1*4882a593SmuzhiyunSamsung S3C24XX Interrupt Controllers 2*4882a593Smuzhiyun 3*4882a593SmuzhiyunThe S3C24XX SoCs contain a custom set of interrupt controllers providing a 4*4882a593Smuzhiyunvarying number of interrupt sources. The set consists of a main- and sub- 5*4882a593Smuzhiyuncontroller and on newer SoCs even a second main controller. 6*4882a593Smuzhiyun 7*4882a593SmuzhiyunRequired properties: 8*4882a593Smuzhiyun- compatible: Compatible property value should be "samsung,s3c2410-irq" 9*4882a593Smuzhiyun for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later. 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun- reg: Physical base address of the controller and length of memory mapped 12*4882a593Smuzhiyun region. 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun- interrupt-controller : Identifies the node as an interrupt controller 15*4882a593Smuzhiyun 16*4882a593Smuzhiyun- #interrupt-cells : Specifies the number of cells needed to encode an 17*4882a593Smuzhiyun interrupt source. The value shall be 4 and interrupt descriptor shall 18*4882a593Smuzhiyun have the following format: 19*4882a593Smuzhiyun <ctrl_num parent_irq ctrl_irq type> 20*4882a593Smuzhiyun 21*4882a593Smuzhiyun ctrl_num contains the controller to use: 22*4882a593Smuzhiyun - 0 ... main controller 23*4882a593Smuzhiyun - 1 ... sub controller 24*4882a593Smuzhiyun - 2 ... second main controller on s3c2416 and s3c2450 25*4882a593Smuzhiyun parent_irq contains the parent bit in the main controller and will be 26*4882a593Smuzhiyun ignored in main controllers 27*4882a593Smuzhiyun ctrl_irq contains the interrupt bit of the controller 28*4882a593Smuzhiyun type contains the trigger type to use 29*4882a593Smuzhiyun 30*4882a593SmuzhiyunExample: 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun interrupt-controller@4a000000 { 33*4882a593Smuzhiyun compatible = "samsung,s3c2410-irq"; 34*4882a593Smuzhiyun reg = <0x4a000000 0x100>; 35*4882a593Smuzhiyun interrupt-controller; 36*4882a593Smuzhiyun #interrupt-cells=<4>; 37*4882a593Smuzhiyun }; 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun [...] 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun serial@50000000 { 42*4882a593Smuzhiyun compatible = "samsung,s3c2410-uart"; 43*4882a593Smuzhiyun reg = <0x50000000 0x4000>; 44*4882a593Smuzhiyun interrupt-parent = <&subintc>; 45*4882a593Smuzhiyun interrupts = <1 28 0 4>, <1 28 1 4>; 46*4882a593Smuzhiyun }; 47*4882a593Smuzhiyun 48*4882a593Smuzhiyun rtc@57000000 { 49*4882a593Smuzhiyun compatible = "samsung,s3c2410-rtc"; 50*4882a593Smuzhiyun reg = <0x57000000 0x100>; 51*4882a593Smuzhiyun interrupt-parent = <&intc>; 52*4882a593Smuzhiyun interrupts = <0 30 0 3>, <0 8 0 3>; 53*4882a593Smuzhiyun }; 54