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#
48 - const: arm,arm1176jzf-devchip-gic
49 - const: arm,arm11mp-gic
52 - const: brcm,brahma-b15-gic
53 - const: arm,cortex-a15-gic
56 - const: nvidia,tegra210-agic
59 - nvidia,tegra186-agic
60 - nvidia,tegra194-agic
61 - const: nvidia,tegra210-agic
63 interrupt-controller: true
73 The 1st cell is the interrupt type; 0 for SPI interrupts, 1 for PPI
76 The 2nd cell contains the interrupt number for the interrupt type.
77 SPI interrupts are in the range [0-987]. PPI interrupts are in the
80 The 3rd cell is the flags, encoded as follows:
81 bits[3:0] trigger type and level flags.
82 1 = low-to-high edge triggered
83 2 = high-to-low edge triggered (invalid for SPIs)
84 4 = active high level-sensitive
85 8 = active low level-sensitive (invalid for SPIs).
86 bits[15:8] PPI interrupt cpu mask. Each bit corresponds to each of
87 the 8 possible cpus attached to the GIC. A bit set to '1' indicated
88 the interrupt is wired to that CPU. Only valid for PPI interrupts.
89 Also note that the configurability of PPI interrupts is IMPLEMENTATION
90 DEFINED and as such not guaranteed to be present (most SoC available
91 in 2014 seem to ignore the setting of this flag and use the hardware
96 Specifies base physical address(s) and size of the GIC registers. The
97 first region is the GIC distributor register base and size. The 2nd region
98 is the GIC cpu interface register base and size.
100 For GICv2 with virtualization extensions, additional regions are
101 required for specifying the base physical address and size of the VGIC
102 registers. The first additional region is the GIC virtual interface
103 control register base and size. The 2nd additional region is the GIC
104 virtual cpu interface register base and size.
111 description: Interrupt source of the parent interrupt controller on
112 secondary GICs, or VGIC maintenance interrupt on primary GIC (see
117 description: per-cpu offset within the distributor and cpu interface
118 regions, used when the GIC doesn't have banked registers. The offset
119 is cpu-offset * cpu-nr.
120 $ref: /schemas/types.yaml#/definitions/uint32
127 description: List of names for the GIC clock input(s). Valid clock names
128 depend on the GIC variant.
130 - const: ic_clk # for "arm,arm11mp-gic"
131 - const: PERIPHCLKEN # for "arm,cortex-a15-gic"
132 - items: # for "arm,cortex-a9-gic"
135 - const: clk # for "arm,gic-400" and "nvidia,tegra210"
136 - const: gclk #for "arm,pl390"
152 * GICv2m extension for MSI/MSI-x support (Optional)
154 Certain revisions of GIC-400 supports MSI/MSI-x via V2M register frame(s).
155 This is enabled by specifying v2m sub-node(s).
159 const: arm,gic-v2m-frame
165 description: GICv2m MSI interface register base and size
168 description: When the MSI_TYPER register contains an incorrect value,
169 this property should contain the SPI base of the MSI frame, overriding
171 $ref: /schemas/types.yaml#/definitions/uint32
174 description: When the MSI_TYPER register contains an incorrect value,
175 this property should contain the number of SPIs assigned to the
176 frame, overriding the HW value.
177 $ref: /schemas/types.yaml#/definitions/uint32
184 additionalProperties: false
186 additionalProperties: false
191 intc: interrupt-controller@fff11000 {
192 compatible = "arm,cortex-a9-gic";
193 #interrupt-cells = <3>;
194 #address-cells = <1>;
195 interrupt-controller;
196 reg = <0xfff11000 0x1000>,
202 interrupt-controller@2c001000 {
203 compatible = "arm,cortex-a15-gic";
204 #interrupt-cells = <3>;
205 interrupt-controller;
206 reg = <0x2c001000 0x1000>,
210 interrupts = <1 9 0xf04>;
214 // GICv2m extension for MSI/MSI-x support
215 interrupt-controller@e1101000 {
216 compatible = "arm,gic-400";
217 #interrupt-cells = <3>;
218 #address-cells = <1>;
220 interrupt-controller;
221 interrupts = <1 8 0xf04>;
222 ranges = <0 0xe1100000 0x100000>;
223 reg = <0xe1110000 0x01000>,
224 <0xe112f000 0x02000>,
225 <0xe1140000 0x10000>,
226 <0xe1160000 0x10000>;
229 compatible = "arm,gic-v2m-frame";
231 reg = <0x80000 0x1000>;
237 compatible = "arm,gic-v2m-frame";
239 reg = <0x90000 0x1000>;