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author | Rob Herring <robh@kernel.org> | 2015-10-01 22:24:09 -0500 |
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committer | Rob Herring <robh@kernel.org> | 2015-10-22 09:21:25 -0500 |
commit | eb3fcf007fffe5830d815e713591f3e858f2a365 (patch) | |
tree | 821e070d59e8b6c21aaf22cab41b8f4c8abc284b /Documentation/devicetree/bindings/interrupt-controller/samsung,exynos4210-combiner.txt | |
parent | 62bc9f15e443c3ca02e47f13f339bd7993ae1e65 (diff) | |
download | op-kernel-dev-eb3fcf007fffe5830d815e713591f3e858f2a365.zip op-kernel-dev-eb3fcf007fffe5830d815e713591f3e858f2a365.tar.gz |
dt-bindings: consolidate interrupt controller bindings
Move various interrupt controller bindings into the
interrupt-controller/ directory.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: linux-mediatek@lists.infradead.org
Diffstat (limited to 'Documentation/devicetree/bindings/interrupt-controller/samsung,exynos4210-combiner.txt')
-rw-r--r-- | Documentation/devicetree/bindings/interrupt-controller/samsung,exynos4210-combiner.txt | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/interrupt-controller/samsung,exynos4210-combiner.txt b/Documentation/devicetree/bindings/interrupt-controller/samsung,exynos4210-combiner.txt new file mode 100644 index 0000000..9e5f734 --- /dev/null +++ b/Documentation/devicetree/bindings/interrupt-controller/samsung,exynos4210-combiner.txt @@ -0,0 +1,52 @@ +* Samsung Exynos Interrupt Combiner Controller + +Samsung's Exynos4 architecture includes a interrupt combiner controller which +can combine interrupt sources as a group and provide a single interrupt request +for the group. The interrupt request from each group are connected to a parent +interrupt controller, such as GIC in case of Exynos4210. + +The interrupt combiner controller consists of multiple combiners. Up to eight +interrupt sources can be connected to a combiner. The combiner outputs one +combined interrupt for its eight interrupt sources. The combined interrupt +is usually connected to a parent interrupt controller. + +A single node in the device tree is used to describe the interrupt combiner +controller module (which includes multiple combiners). A combiner in the +interrupt controller module shares config/control registers with other +combiners. For example, a 32-bit interrupt enable/disable config register +can accommodate up to 4 interrupt combiners (with each combiner supporting +up to 8 interrupt sources). + +Required properties: +- compatible: should be "samsung,exynos4210-combiner". +- interrupt-controller: Identifies the node as an interrupt controller. +- #interrupt-cells: should be <2>. The meaning of the cells are + * First Cell: Combiner Group Number. + * Second Cell: Interrupt number within the group. +- reg: Base address and size of interrupt combiner registers. +- interrupts: The list of interrupts generated by the combiners which are then + connected to a parent interrupt controller. The format of the interrupt + specifier depends in the interrupt parent controller. + +Optional properties: +- samsung,combiner-nr: The number of interrupt combiners supported. If this + property is not specified, the default number of combiners is assumed + to be 16. +- interrupt-parent: pHandle of the parent interrupt controller, if not + inherited from the parent node. + + +Example: + + The following is a an example from the Exynos4210 SoC dtsi file. + + combiner:interrupt-controller@10440000 { + compatible = "samsung,exynos4210-combiner"; + interrupt-controller; + #interrupt-cells = <2>; + reg = <0x10440000 0x1000>; + interrupts = <0 0 0>, <0 1 0>, <0 2 0>, <0 3 0>, + <0 4 0>, <0 5 0>, <0 6 0>, <0 7 0>, + <0 8 0>, <0 9 0>, <0 10 0>, <0 11 0>, + <0 12 0>, <0 13 0>, <0 14 0>, <0 15 0>; + }; |