Allwinner Sunxi Interrupt Controller

Required properties:

- compatible : should be "allwinner,sun4i-ic"
- reg : Specifies base physical address and size of the registers.
- 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.

The interrupt sources are as follows:

0: ENMI
1: UART0
2: UART1
3: UART2
4: UART3
5: IR0
6: IR1
7: I2C0
8: I2C1
9: I2C2
10: SPI0
11: SPI1
12: SPI2
13: SPDIF
14: AC97
15: TS
16: I2S
17: UART4
18: UART5
19: UART6
20: UART7
21: KEYPAD
22: TIMER0
23: TIMER1
24: TIMER2
25: TIMER3
26: CAN
27: DMA
28: PIO
29: TOUCH_PANEL
30: AUDIO_CODEC
31: LRADC
32: SDMC0
33: SDMC1
34: SDMC2
35: SDMC3
36: MEMSTICK
37: NAND
38: USB0
39: USB1
40: USB2
41: SCR
42: CSI0
43: CSI1
44: LCDCTRL0
45: LCDCTRL1
46: MP
47: DEFEBE0
48: DEFEBE1
49: PMU
50: SPI3
51: TZASC
52: PATA
53: VE
54: SS
55: EMAC
56: SATA
57: GPS
58: HDMI
59: TVE
60: ACE
61: TVD
62: PS2_0
63: PS2_1
64: USB3
65: USB4
66: PLE_PFM
67: TIMER4
68: TIMER5
69: GPU_GP
70: GPU_GPMMU
71: GPU_PP0
72: GPU_PPMMU0
73: GPU_PMU
74: GPU_RSV0
75: GPU_RSV1
76: GPU_RSV2
77: GPU_RSV3
78: GPU_RSV4
79: GPU_RSV5
80: GPU_RSV6
82: SYNC_TIMER0
83: SYNC_TIMER1

Example:

intc: interrupt-controller {
	compatible = "allwinner,sun4i-ic";
	reg = <0x01c20400 0x400>;
	interrupt-controller;
	#interrupt-cells = <2>;
};
