This adds device tree bindings for the IXP4xx interrupt
controller. It's a standard 2-cell controller.
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Jason Cooper <jason@xxxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
irqchip maintainers: I am requesting an ACK for this once
you're happy with the bindings, as I intend to merge all of
this IXP4xx rework through ARM SoC.
---
.../intel,ixp4xx-interrupt.txt | 33 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 34 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.txt
diff --git a/Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.txt b/Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.txt
new file mode 100644
index 000000000000..70ee93b9a6c0
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.txt
@@ -0,0 +1,33 @@
+* Intel IXP4xx XScale Networking Processors Interrupt Controller
+
+This interrupt controller is found in the Intel IXP4xx processors.
+Some processors have 32 interrupts, some have up to 64 interrupts.
+The exact number of interrupts is determined from the compatible
+string.
+
+The distinct IXP4xx families with different interrupt controller
+variations are IXP42x, IXP43x, IXP45x and IXP46x. Those four
+families were the only ones to reach the developer and consumer
+market.
+
+Required properties:
+- compatible: must be one of
+ "intel,ixp42x-interrupt"
+ "intel,ixp43x-interrupt"
+ "intel,ixp45x-interrupt"
+ "intel,ixp46x-interrupt"
+- reg: The register bank for the interrupt controller.
+- interrupt-controller: Identifies the node as an interrupt controller
+- #interrupt-cells: The number of cells to define the interrupts.
+ Must be <2>. The bindings follows the standard binding for controllers
+ with two cells specified in
+ interrupt-controller/interrupts.txt
+
+Example:
+
+intcon: interrupt-controller@c8003000 {
+ compatible = "intel,ixp43x-interrupt";
+ reg = <0xc8003000 0x100>;
+ interrupt-controller;
+ #interrupt-cells = <2>;
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index a2fb67b75026..ec318f09540c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1650,6 +1650,7 @@ M: Imre Kaloz <kaloz@xxxxxxxxxxx>
M: Krzysztof Halasa <khalasa@xxxxxxx>
L: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx (moderated for non-subscribers)
S: Maintained
+F: Documentation/devicetree/bindings/interrupt-controller/intel,ixp4xx-interrupt.txt
F: arch/arm/mach-ixp4xx/
F: drivers/clocksource/timer-ixp4xx.c
F: drivers/gpio/gpio-ixp4xx.c
--
2.20.1
