BCM2835 Top-Level ("ARMCTRL") Interrupt Controller

The BCM2835 contains a custom top-level interrupt controller, which supports
72 interrupt sources using a 2-level register scheme. The interrupt
controller, or the HW block containing it, is referred to occasionally
as "armctrl" in the SoC documentation, hence naming of this binding.

Required properties:

- compatible : should be "brcm,bcm2835-armctrl-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 2.

  The 1st cell is the interrupt bank; 0 for interrupts in the "IRQ basic
  pending" register, or 1/2 respectively for interrupts in the "IRQ pending
  1/2" register.

  The 2nd cell contains the interrupt number within the bank. Valid values
  are 0..7 for bank 0, and 0..31 for bank 1.

The interrupt sources are as follows:

Bank 0:
0: ARM_TIMER
1: ARM_MAILBOX
2: ARM_DOORBELL_0
3: ARM_DOORBELL_1
4: VPU0_HALTED
5: VPU1_HALTED
6: ILLEGAL_TYPE0
7: ILLEGAL_TYPE1

Bank 1:
0: TIMER0
1: TIMER1
2: TIMER2
3: TIMER3
4: CODEC0
5: CODEC1
6: CODEC2
7: VC_JPEG
8: ISP
9: VC_USB
10: VC_3D
11: TRANSPOSER
12: MULTICORESYNC0
13: MULTICORESYNC1
14: MULTICORESYNC2
15: MULTICORESYNC3
16: DMA0
17: DMA1
18: VC_DMA2
19: VC_DMA3
20: DMA4
21: DMA5
22: DMA6
23: DMA7
24: DMA8
25: DMA9
26: DMA10
27: DMA11
28: DMA12
29: AUX
30: ARM
31: VPUDMA

Bank 2:
0: HOSTPORT
1: VIDEOSCALER
2: CCP2TX
3: SDC
4: DSI0
5: AVE
6: CAM0
7: CAM1
8: HDMI0
9: HDMI1
10: PIXELVALVE1
11: I2CSPISLV
12: DSI1
13: PWA0
14: PWA1
15: CPR
16: SMI
17: GPIO0
18: GPIO1
19: GPIO2
20: GPIO3
21: VC_I2C
22: VC_SPI
23: VC_I2SPCM
24: VC_SDIO
25: VC_UART
26: SLIMBUS
27: VEC
28: CPG
29: RNG
30: VC_ARASANSDIO
31: AVSPMON

Example:

intc: interrupt-controller {
	compatible = "brcm,bcm2835-armctrl-ic";
	reg = <0x7e00b200 0x200>;
	interrupt-controller;
	#interrupt-cells = <2>;
};
