[PATCH 01/10] dt/bindings: add passthru-mask property to versatile-fpga-irq
From: Linus Walleij <hidden>
Date: 2014-05-23 12:46:41
Also in:
linux-devicetree
On Tue, May 20, 2014 at 11:09 PM, Rob Herring [off-list ref] wrote:
quoted hunk
From: Rob Herring <robh@kernel.org> Add a passthru-mask property for setting interrupts which are passed through directly to a primary controller. Signed-off-by: Rob Herring <robh@kernel.org> Cc: Pawel Moll <redacted> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Ian Campbell <redacted> Cc: Kumar Gala <redacted> --- Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt | 3 +++ 1 file changed, 3 insertions(+)diff --git a/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt b/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt index c9cf605..956b71d 100644 --- a/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt +++ b/Documentation/devicetree/bindings/arm/versatile-fpga-irq.txt@@ -34,3 +34,6 @@ 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. +- passthru-mask: a u32 number representing a bit mas determining which of
bit mask (speling)
+ the interrupts are directly passed through to the primary interrupt + controller.
This is very confusing on the Integrators. The FPGA IRQ controller *is* the primary interrupt controller on these. (Further on Integrators with an IM-PD1 expansion board the VIC is actually the secondary controller visavis the FPGA IRQ controller which is the primary one.) So on the versatile the FPGA IRQ controller is *not* cascaded off one line of the VIC but rather connected in parallel or something? Care to elaborate a bit on how things are cascaded here? And specify that this is for some special usecase or something? I'll read through the patches and see if I can wrap my head around this. Yours, Linus Walleij