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author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-10-30 07:09:18 (GMT) |
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committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-10-30 07:09:18 (GMT) |
commit | 68fe0f0a6dcd2ac1ace5da3647a6d1cf0f4d2fea (patch) | |
tree | 69d855c2e46d42ef8f23680cf3a1e6ff38de9ef4 /Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt | |
parent | 88fd449e734a4264347e12b8ff74ccb33a9b9a35 (diff) | |
parent | 8f0d8163b50e01f398b14bcd4dc039ac5ab18d64 (diff) | |
download | linux-68fe0f0a6dcd2ac1ace5da3647a6d1cf0f4d2fea.tar.xz |
Merge tag 'v3.7-rc3' into for-linus to sync up with recent USB changes
Diffstat (limited to 'Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt')
-rw-r--r-- | Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt b/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt new file mode 100644 index 0000000..9989eda --- /dev/null +++ b/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt @@ -0,0 +1,31 @@ +* ARM Versatile FPGA interrupt controller + +One or more FPGA IRQ controllers can be synthesized in an ARM reference board +such as the Integrator or Versatile family. The output of these different +controllers are OR:ed together and fed to the CPU tile's IRQ input. Each +instance can handle up to 32 interrupts. + +Required properties: +- compatible: "arm,versatile-fpga-irq" +- interrupt-controller: Identifies the node as an interrupt controller +- #interrupt-cells: The number of cells to define the interrupts. Must be 1 + as the FPGA IRQ controller has no configuration options for interrupt + sources. The cell is a u32 and defines the interrupt number. +- reg: The register bank for the FPGA interrupt controller. +- clear-mask: a u32 number representing the mask written to clear all IRQs + on the controller at boot for example. +- valid-mask: a u32 number representing a bit mask determining which of + the interrupts are valid. Unconnected/unused lines are set to 0, and + the system till not make it possible for devices to request these + interrupts. + +Example: + +pic: pic@14000000 { + compatible = "arm,versatile-fpga-irq"; + #interrupt-cells = <1>; + interrupt-controller; + reg = <0x14000000 0x100>; + clear-mask = <0xffffffff>; + valid-mask = <0x003fffff>; +}; |