mirror of
https://github.com/torvalds/linux.git
synced 2024-12-26 21:02:19 +00:00
eb3fcf007f
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
53 lines
2.3 KiB
Plaintext
53 lines
2.3 KiB
Plaintext
* 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>;
|
|
};
|