irqchip: Conexant CX92755 interrupts controller support

This short series adds support for the Conexant CX92755 SoC interrupts controller. This SoC is part of the Conexant Digicolor series of SoCs.

v3:
* Split from the "ARM: Conexant Digicolor CX92755 SoC support" series, as these patches should go via the irqchip maintainers

* Use syscon to access the system global UC_IRQ_CONTROL register

* Add description of the "syscon" property to the device tree binding documentation

* Rename the interrupt controller node name to "interrupt-controller" (Sergei Shtylyov)

v2:
http://marc.info/?t=142074613900007&r=1&w=2

* Migrate the irq driver to generic irq chip, simplifying the code somewhat (Arnd Bergmann)

v1:
http://thread.gmane.org/gmane.linux.kernel/1855027

Baruch Siach (2):
irqchip: devicetree: document Conexant Digicolor irq binding
irqchip: Conexant CX92755 interrupts controller driver

 .../bindings/interrupt-controller/digicolor-ic.txt |  22 ++++
 drivers/irqchip/Makefile                           |   1 +
 drivers/irqchip/irq-digicolor.c                    | 120 +++++++++++++++++++++
 3 files changed, 143 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/digicolor-ic.txt
 create mode 100644 drivers/irqchip/irq-digicolor.c

2.1.4

---
 .../bindings/interrupt-controller/digicolor-ic.txt | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/digicolor-ic.txt

new file mode 100644
index 000000000000..c25c9a4de615
@@ -0,0 +1,22 @@
+Conexant Digicolor Interrupt Controller
+
+Required properties:
+
+- compatible : should be "cnxt,cx92755-ic"
+- reg : Specifies base physical address and size of the interrupt controller
+  registers (IC) area
+- interrupt-controller : Identifies the node as an interrupt controller
+- #interrupt-cells : Specifies the number of cells needed to encode an
+  interrupt source. The value shall be 1.
+- syscon: A phandle to the syscon node describing UC registers
+
+Example:
+
+	intc: interrupt-controller at f0000040 {
+		compatible = "cnxt,cx92755-ic";
+		interrupt-controller;
+		#interrupt-cells = <1>;
+		reg = <0xf0000040 0x40>;
+		syscon = <&uc_regs>;
+	};
+

2.1.4

Add interrupt controller driver to the Conexant CX92755 SoC, part of the Digicolor SoCs series. Use the generic irq framework support. Use syscon to access the system global UC_IRQ_CONTROL register.

---
 drivers/irqchip/Makefile        |   1 +
 drivers/irqchip/irq-digicolor.c | 120 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 121 insertions(+)
 create mode 100644 drivers/irqchip/irq-digicolor.c

index 9516a324be6d..42965d2476bb 100644
@@ -42,3 +42,4 @@ obj-$(CONFIG_BRCMSTB_L2_IRQ)		+= irq-brcmstb-l2.o
 obj-$(CONFIG_KEYSTONE_IRQ)		+= irq-keystone.o
 obj-$(CONFIG_MIPS_GIC)			+= irq-mips-gic.o
 obj-$(CONFIG_ARCH_MEDIATEK)		+= irq-mtk-sysirq.o
+obj-$(CONFIG_ARCH_DIGICOLOR)		+= irq-digicolor.o

2.1.4