1 # SPDX-License-Identifier: GPL-2.0
4 $id: http://devicetree.org/schemas/interrupt-controller/arm,gic.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: ARM Generic Interrupt Controller v1 and v2
10 - Marc Zyngier <marc.zyngier@arm.com>
13 ARM SMP cores are often associated with a GIC, providing per processor
14 interrupts (PPI), shared processor interrupts (SPI) and software
15 generated interrupts (SGI).
17 Primary GIC is attached directly to the CPU and typically has PPIs and SGIs.
18 Secondary GICs are cascaded into the upward interrupt controller and do not
22 - $ref: /schemas/interrupt-controller.yaml#
38 - nvidia,tegra210-agic
43 - const: arm,arm1176jzf-devchip-gic
44 - const: arm,arm11mp-gic
47 - const: brcm,brahma-b15-gic
48 - const: arm,cortex-a15-gic
50 interrupt-controller: true
60 The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
63 The 2nd cell contains the interrupt number for the interrupt type.
64 SPI interrupts are in the range [0-987]. PPI interrupts are in the
67 The 3rd cell is the flags, encoded as follows:
68 bits[3:0] trigger type and level flags.
69 1 = low-to-high edge triggered
70 2 = high-to-low edge triggered (invalid for SPIs)
71 4 = active high level-sensitive
72 8 = active low level-sensitive (invalid for SPIs).
73 bits[15:8] PPI interrupt cpu mask. Each bit corresponds to each of
74 the 8 possible cpus attached to the GIC. A bit set to '1' indicated
75 the interrupt is wired to that CPU. Only valid for PPI interrupts.
76 Also note that the configurability of PPI interrupts is IMPLEMENTATION
77 DEFINED and as such not guaranteed to be present (most SoC available
78 in 2014 seem to ignore the setting of this flag and use the hardware
83 Specifies base physical address(s) and size of the GIC registers. The
84 first region is the GIC distributor register base and size. The 2nd region
85 is the GIC cpu interface register base and size.
87 For GICv2 with virtualization extensions, additional regions are
88 required for specifying the base physical address and size of the VGIC
89 registers. The first additional region is the GIC virtual interface
90 control register base and size. The 2nd additional region is the GIC
91 virtual cpu interface register base and size.
96 description: Interrupt source of the parent interrupt controller on
97 secondary GICs, or VGIC maintenance interrupt on primary GIC (see
102 description: per-cpu offset within the distributor and cpu interface
103 regions, used when the GIC doesn't have banked registers. The offset
104 is cpu-offset * cpu-nr.
105 $ref: /schemas/types.yaml#/definitions/uint32
112 description: List of names for the GIC clock input(s). Valid clock names
113 depend on the GIC variant.
115 - const: ic_clk # for "arm,arm11mp-gic"
116 - const: PERIPHCLKEN # for "arm,cortex-a15-gic"
117 - items: # for "arm,cortex-a9-gic"
120 - const: clk # for "arm,gic-400" and "nvidia,tegra210"
121 - const: gclk #for "arm,pl390"
133 * GICv2m extension for MSI/MSI-x support (Optional)
135 Certain revisions of GIC-400 supports MSI/MSI-x via V2M register frame(s).
136 This is enabled by specifying v2m sub-node(s).
140 const: arm,gic-v2m-frame
146 description: GICv2m MSI interface register base and size
149 description: When the MSI_TYPER register contains an incorrect value,
150 this property should contain the SPI base of the MSI frame, overriding
152 $ref: /schemas/types.yaml#/definitions/uint32
155 description: When the MSI_TYPER register contains an incorrect value,
156 this property should contain the number of SPIs assigned to the
157 frame, overriding the HW value.
158 $ref: /schemas/types.yaml#/definitions/uint32
165 additionalProperties: false
167 additionalProperties: false
172 intc: interrupt-controller@fff11000 {
173 compatible = "arm,cortex-a9-gic";
174 #interrupt-cells = <3>;
175 #address-cells = <1>;
176 interrupt-controller;
177 reg = <0xfff11000 0x1000>,
183 interrupt-controller@2c001000 {
184 compatible = "arm,cortex-a15-gic";
185 #interrupt-cells = <3>;
186 interrupt-controller;
187 reg = <0x2c001000 0x1000>,
191 interrupts = <1 9 0xf04>;
195 // GICv2m extension for MSI/MSI-x support
196 interrupt-controller@e1101000 {
197 compatible = "arm,gic-400";
198 #interrupt-cells = <3>;
199 #address-cells = <2>;
201 interrupt-controller;
202 interrupts = <1 8 0xf04>;
203 ranges = <0 0 0 0xe1100000 0 0x100000>;
204 reg = <0x0 0xe1110000 0 0x01000>,
205 <0x0 0xe112f000 0 0x02000>,
206 <0x0 0xe1140000 0 0x10000>,
207 <0x0 0xe1160000 0 0x10000>;
210 compatible = "arm,gic-v2m-frame";
212 reg = <0x0 0x80000 0 0x1000>;
218 compatible = "arm,gic-v2m-frame";
220 reg = <0x0 0x90000 0 0x1000>;