Initial commit; kernel source import

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Nathan
2025-04-06 23:50:55 -05:00
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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>;
};

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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>;
};

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Specifying interrupt information for devices
============================================
1) Interrupt client nodes
-------------------------
Nodes that describe devices which generate interrupts must contain an
"interrupts" property. This property must contain a list of interrupt
specifiers, one per output interrupt. The format of the interrupt specifier is
determined by the interrupt controller to which the interrupts are routed; see
section 2 below for details.
The "interrupt-parent" property is used to specify the controller to which
interrupts are routed and contains a single phandle referring to the interrupt
controller node. This property is inherited, so it may be specified in an
interrupt client node or in any of its parent nodes.
2) Interrupt controller nodes
-----------------------------
A device is marked as an interrupt controller with the "interrupt-controller"
property. This is a empty, boolean property. An additional "#interrupt-cells"
property defines the number of cells needed to specify a single interrupt.
It is the responsibility of the interrupt controller's binding to define the
length and format of the interrupt specifier. The following two variants are
commonly used:
a) one cell
-----------
The #interrupt-cells property is set to 1 and the single cell defines the
index of the interrupt within the controller.
Example:
vic: intc@10140000 {
compatible = "arm,versatile-vic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x10140000 0x1000>;
};
sic: intc@10003000 {
compatible = "arm,versatile-sic";
interrupt-controller;
#interrupt-cells = <1>;
reg = <0x10003000 0x1000>;
interrupt-parent = <&vic>;
interrupts = <31>; /* Cascaded to vic */
};
b) two cells
------------
The #interrupt-cells property is set to 2 and the first cell defines the
index of the interrupt within the controller, while the second cell is used
to specify any of the following flags:
- bits[3:0] trigger type and level flags
1 = low-to-high edge triggered
2 = high-to-low edge triggered
4 = active high level-sensitive
8 = active low level-sensitive
Example:
i2c@7000c000 {
gpioext: gpio-adnp@41 {
compatible = "ad,gpio-adnp";
reg = <0x41>;
interrupt-parent = <&gpio>;
interrupts = <160 1>;
gpio-controller;
#gpio-cells = <1>;
interrupt-controller;
#interrupt-cells = <2>;
nr-gpios = <64>;
};
sx8634@2b {
compatible = "smtc,sx8634";
reg = <0x2b>;
interrupt-parent = <&gpioext>;
interrupts = <3 0x8>;
#address-cells = <1>;
#size-cells = <0>;
threshold = <0x40>;
sensitivity = <7>;
};
};

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Samsung S3C24XX Interrupt Controllers
The S3C24XX SoCs contain a custom set of interrupt controllers providing a
varying number of interrupt sources. The set consists of a main- and sub-
controller and on newer SoCs even a second main controller.
Required properties:
- compatible: Compatible property value should be "samsung,s3c2410-irq"
for machines before s3c2416 and "samsung,s3c2416-irq" for s3c2416 and later.
- reg: Physical base address of the controller and length of memory mapped
region.
- 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 4 and interrupt descriptor shall
have the following format:
<ctrl_num parent_irq ctrl_irq type>
ctrl_num contains the controller to use:
- 0 ... main controller
- 1 ... sub controller
- 2 ... second main controller on s3c2416 and s3c2450
parent_irq contains the parent bit in the main controller and will be
ignored in main controllers
ctrl_irq contains the interrupt bit of the controller
type contains the trigger type to use
Example:
interrupt-controller@4a000000 {
compatible = "samsung,s3c2410-irq";
reg = <0x4a000000 0x100>;
interrupt-controller;
#interrupt-cells=<4>;
};
[...]
serial@50000000 {
compatible = "samsung,s3c2410-uart";
reg = <0x50000000 0x4000>;
interrupt-parent = <&subintc>;
interrupts = <1 28 0 4>, <1 28 1 4>;
};
rtc@57000000 {
compatible = "samsung,s3c2410-rtc";
reg = <0x57000000 0x100>;
interrupt-parent = <&intc>;
interrupts = <0 30 0 3>, <0 8 0 3>;
};