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