Based on kernel version 4.3. Page generated on 2015-11-02 12:44 EST.
1 * Samsung Exynos Interrupt Combiner Controller 2 3 Samsung's Exynos4 architecture includes a interrupt combiner controller which 4 can combine interrupt sources as a group and provide a single interrupt request 5 for the group. The interrupt request from each group are connected to a parent 6 interrupt controller, such as GIC in case of Exynos4210. 7 8 The interrupt combiner controller consists of multiple combiners. Up to eight 9 interrupt sources can be connected to a combiner. The combiner outputs one 10 combined interrupt for its eight interrupt sources. The combined interrupt 11 is usually connected to a parent interrupt controller. 12 13 A single node in the device tree is used to describe the interrupt combiner 14 controller module (which includes multiple combiners). A combiner in the 15 interrupt controller module shares config/control registers with other 16 combiners. For example, a 32-bit interrupt enable/disable config register 17 can accommodate up to 4 interrupt combiners (with each combiner supporting 18 up to 8 interrupt sources). 19 20 Required properties: 21 - compatible: should be "samsung,exynos4210-combiner". 22 - interrupt-controller: Identifies the node as an interrupt controller. 23 - #interrupt-cells: should be <2>. The meaning of the cells are 24 * First Cell: Combiner Group Number. 25 * Second Cell: Interrupt number within the group. 26 - reg: Base address and size of interrupt combiner registers. 27 - interrupts: The list of interrupts generated by the combiners which are then 28 connected to a parent interrupt controller. The format of the interrupt 29 specifier depends in the interrupt parent controller. 30 31 Optional properties: 32 - samsung,combiner-nr: The number of interrupt combiners supported. If this 33 property is not specified, the default number of combiners is assumed 34 to be 16. 35 - interrupt-parent: pHandle of the parent interrupt controller, if not 36 inherited from the parent node. 37 38 39 Example: 40 41 The following is a an example from the Exynos4210 SoC dtsi file. 42 43 combiner:interrupt-controller@10440000 { 44 compatible = "samsung,exynos4210-combiner"; 45 interrupt-controller; 46 #interrupt-cells = <2>; 47 reg = <0x10440000 0x1000>; 48 interrupts = <0 0 0>, <0 1 0>, <0 2 0>, <0 3 0>, 49 <0 4 0>, <0 5 0>, <0 6 0>, <0 7 0>, 50 <0 8 0>, <0 9 0>, <0 10 0>, <0 11 0>, 51 <0 12 0>, <0 13 0>, <0 14 0>, <0 15 0>; 52 };