189323f8cSGrygorii StrashkoKeystone 2 IRQ controller IP 289323f8cSGrygorii Strashko 389323f8cSGrygorii StrashkoOn Keystone SOCs, DSP cores can send interrupts to ARM 489323f8cSGrygorii Strashkohost using the IRQ controller IP. It provides 28 IRQ signals to ARM. 589323f8cSGrygorii StrashkoThe IRQ handler running on HOST OS can identify DSP signal source by 689323f8cSGrygorii Strashkoanalyzing SRCCx bits in IPCARx registers. This is one of the component 789323f8cSGrygorii Strashkoused by the IPC mechanism used on Keystone SOCs. 889323f8cSGrygorii Strashko 989323f8cSGrygorii StrashkoRequired Properties: 1089323f8cSGrygorii Strashko- compatible: should be "ti,keystone-irq" 1189323f8cSGrygorii Strashko- ti,syscon-dev : phandle and offset pair. The phandle to syscon used to 1289323f8cSGrygorii Strashko access device control registers and the offset inside 1389323f8cSGrygorii Strashko device control registers range. 1489323f8cSGrygorii Strashko- interrupt-controller : Identifies the node as an interrupt controller 1589323f8cSGrygorii Strashko- #interrupt-cells : Specifies the number of cells needed to encode interrupt 1689323f8cSGrygorii Strashko source should be 1. 1789323f8cSGrygorii Strashko- interrupts: interrupt reference to primary interrupt controller 1889323f8cSGrygorii Strashko 1989323f8cSGrygorii StrashkoPlease refer to interrupts.txt in this directory for details of the common 2089323f8cSGrygorii StrashkoInterrupt Controllers bindings used by client devices. 2189323f8cSGrygorii Strashko 2289323f8cSGrygorii StrashkoExample: 23*48c926cdSMarco Franchi kirq0: keystone_irq0@26202a0 { 2489323f8cSGrygorii Strashko compatible = "ti,keystone-irq"; 2589323f8cSGrygorii Strashko ti,syscon-dev = <&devctrl 0x2a0>; 2689323f8cSGrygorii Strashko interrupts = <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>; 2789323f8cSGrygorii Strashko interrupt-controller; 2889323f8cSGrygorii Strashko #interrupt-cells = <1>; 2989323f8cSGrygorii Strashko }; 3089323f8cSGrygorii Strashko 3189323f8cSGrygorii Strashko dsp0: dsp0 { 3289323f8cSGrygorii Strashko compatible = "linux,rproc-user"; 3389323f8cSGrygorii Strashko ... 3489323f8cSGrygorii Strashko interrupt-parent = <&kirq0>; 3589323f8cSGrygorii Strashko interrupts = <10 2>; 3689323f8cSGrygorii Strashko }; 37