From 9bc1503185a09930782012fda5601694caeec77a Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Thu, 6 Sep 2012 09:07:57 +0100 Subject: ARM: 7516/1: plat-versatile: add DT support to FPGA IRQ This adds Device Tree probing support to the Versatile FPGA IRQ controller. Signed-off-by: Linus Walleij Signed-off-by: Russell King --- .../devicetree/bindings/arm/versatile-fpga-irq.txt | 31 ++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt (limited to 'Documentation') 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>; +}; -- cgit v1.1