1 Keystone 2 IRQ controller IP 1 Keystone 2 IRQ controller IP
2 2
3 On Keystone SOCs, DSP cores can send interrupt 3 On Keystone SOCs, DSP cores can send interrupts to ARM
4 host using the IRQ controller IP. It provides 4 host using the IRQ controller IP. It provides 28 IRQ signals to ARM.
5 The IRQ handler running on HOST OS can identif 5 The IRQ handler running on HOST OS can identify DSP signal source by
6 analyzing SRCCx bits in IPCARx registers. This 6 analyzing SRCCx bits in IPCARx registers. This is one of the component
7 used by the IPC mechanism used on Keystone SOC 7 used by the IPC mechanism used on Keystone SOCs.
8 8
9 Required Properties: 9 Required Properties:
10 - compatible: should be "ti,keystone-irq" 10 - compatible: should be "ti,keystone-irq"
11 - ti,syscon-dev : phandle and offset pair. The 11 - ti,syscon-dev : phandle and offset pair. The phandle to syscon used to
12 access device control 12 access device control registers and the offset inside
13 device control registe 13 device control registers range.
14 - interrupt-controller : Identifies the node a 14 - interrupt-controller : Identifies the node as an interrupt controller
15 - #interrupt-cells : Specifies the number of c 15 - #interrupt-cells : Specifies the number of cells needed to encode interrupt
16 sourc 16 source should be 1.
17 - interrupts: interrupt reference to primary i 17 - interrupts: interrupt reference to primary interrupt controller
18 18
19 Please refer to interrupts.txt in this directo 19 Please refer to interrupts.txt in this directory for details of the common
20 Interrupt Controllers bindings used by client 20 Interrupt Controllers bindings used by client devices.
21 21
22 Example: 22 Example:
23 kirq0: keystone_irq0@26202a0 { !! 23 kirq0: keystone_irq0@026202a0 {
24 compatible = "ti,keystone-irq" 24 compatible = "ti,keystone-irq";
25 ti,syscon-dev = <&devctrl 0x2a 25 ti,syscon-dev = <&devctrl 0x2a0>;
26 interrupts = <GIC_SPI 4 IRQ_TY 26 interrupts = <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>;
27 interrupt-controller; 27 interrupt-controller;
28 #interrupt-cells = <1>; 28 #interrupt-cells = <1>;
29 }; 29 };
30 30
31 dsp0: dsp0 { 31 dsp0: dsp0 {
32 compatible = "linux,rproc-user 32 compatible = "linux,rproc-user";
33 ... 33 ...
34 interrupt-parent = <&kirq0>; 34 interrupt-parent = <&kirq0>;
35 interrupts = <10 2>; 35 interrupts = <10 2>;
36 }; 36 };
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