[tip:irq/core] irqchip/ts4800: Add documentation for TS-4800 interrupt controller

[tip-bot for Damien Riegel]

Commit-ID:  0f6d785c847eeff55ae19546f5885156394be569
Gitweb:     http://git.kernel.org/tip/0f6d785c847eeff55ae19546f5885156394be569
Author:     Damien Riegel <damien.riegel@xxxxxxxxxxxxxxxxxxxx>
AuthorDate: Mon, 21 Dec 2015 15:11:22 -0500
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Tue, 29 Dec 2015 11:58:53 +0100

irqchip/ts4800: Add documentation for TS-4800 interrupt controller

This is an interrupt-controller implemented in an FPGA, to multiplex
interrupts generated from other IPs. The FPGA usually uses a GPIO as a
parent interrupt controller to notify that one of the multiplexed
interrupts has triggered.

Signed-off-by: Damien Riegel <damien.riegel@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Rob Herring <robh@xxxxxxxxxx>
Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Pawel Moll <pawel.moll@xxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Ian Campbell <ijc+devicetree@xxxxxxxxxxxxxx>
Cc: Kumar Gala <galak@xxxxxxxxxxxxxx>
Cc: kernel@xxxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1450728683-31416-1-git-send-email-damien.riegel@xxxxxxxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 .../bindings/interrupt-controller/technologic,ts4800.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt b/Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt
new file mode 100644
index 0000000..7f15f1b
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/technologic,ts4800.txt
@@ -0,0 +1,16 @@
+TS-4800 FPGA interrupt controller
+
+TS-4800 FPGA has an internal interrupt controller. When one of the
+interrupts is triggered, the SoC is notified, usually using a GPIO as
+parent interrupt source.
+
+Required properties:
+- compatible: should be "technologic,ts4800-irqc"
+- interrupt-controller: identifies the node as an interrupt controller
+- reg: physical base address of the controller and length of memory mapped
+  region
+- #interrupt-cells: specifies the number of cells needed to encode an interrupt
+  source, should be 1.
+- interrupt-parent: phandle to the parent interrupt controller this one is
+  cascaded from
+- interrupts: specifies the interrupt line in the interrupt-parent controller
--
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