From bdd272cbb97a66cf83061d22cfd19beb7267943a Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Fri, 4 Oct 2013 15:15:35 +0200 Subject: irqchip: versatile FPGA: support cascaded interrupts from DT The Versatile FPGA interrupt controller supports cascading interrupts, i.e. that its output is connected to the input of another interrupt controller. This makes it possible to pass a parent interrupt from the device tree and print it in the boot log if applicable. Acked-by: Thomas Gleixner Signed-off-by: Linus Walleij --- Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt') diff --git a/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt b/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt index 9989eda755d9..c9cf605bb995 100644 --- a/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt +++ b/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt @@ -29,3 +29,8 @@ pic: pic@14000000 { clear-mask = <0xffffffff>; valid-mask = <0x003fffff>; }; + +Optional properties: +- interrupts: if the FPGA IRQ controller is cascaded, i.e. if its IRQ + output is simply connected to the input of another IRQ controller, + then the parent IRQ shall be specified in this property. -- cgit v1.2.2