1*89323f8cSGrygorii StrashkoKeystone 2 IRQ controller IP 2*89323f8cSGrygorii Strashko 3*89323f8cSGrygorii StrashkoOn Keystone SOCs, DSP cores can send interrupts to ARM 4*89323f8cSGrygorii Strashkohost using the IRQ controller IP. It provides 28 IRQ signals to ARM. 5*89323f8cSGrygorii StrashkoThe IRQ handler running on HOST OS can identify DSP signal source by 6*89323f8cSGrygorii Strashkoanalyzing SRCCx bits in IPCARx registers. This is one of the component 7*89323f8cSGrygorii Strashkoused by the IPC mechanism used on Keystone SOCs. 8*89323f8cSGrygorii Strashko 9*89323f8cSGrygorii StrashkoRequired Properties: 10*89323f8cSGrygorii Strashko- compatible: should be "ti,keystone-irq" 11*89323f8cSGrygorii Strashko- ti,syscon-dev : phandle and offset pair. The phandle to syscon used to 12*89323f8cSGrygorii Strashko access device control registers and the offset inside 13*89323f8cSGrygorii Strashko device control registers range. 14*89323f8cSGrygorii Strashko- interrupt-controller : Identifies the node as an interrupt controller 15*89323f8cSGrygorii Strashko- #interrupt-cells : Specifies the number of cells needed to encode interrupt 16*89323f8cSGrygorii Strashko source should be 1. 17*89323f8cSGrygorii Strashko- interrupts: interrupt reference to primary interrupt controller 18*89323f8cSGrygorii Strashko 19*89323f8cSGrygorii StrashkoPlease refer to interrupts.txt in this directory for details of the common 20*89323f8cSGrygorii StrashkoInterrupt Controllers bindings used by client devices. 21*89323f8cSGrygorii Strashko 22*89323f8cSGrygorii StrashkoExample: 23*89323f8cSGrygorii Strashko kirq0: keystone_irq0@026202a0 { 24*89323f8cSGrygorii Strashko compatible = "ti,keystone-irq"; 25*89323f8cSGrygorii Strashko ti,syscon-dev = <&devctrl 0x2a0>; 26*89323f8cSGrygorii Strashko interrupts = <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>; 27*89323f8cSGrygorii Strashko interrupt-controller; 28*89323f8cSGrygorii Strashko #interrupt-cells = <1>; 29*89323f8cSGrygorii Strashko }; 30*89323f8cSGrygorii Strashko 31*89323f8cSGrygorii Strashko dsp0: dsp0 { 32*89323f8cSGrygorii Strashko compatible = "linux,rproc-user"; 33*89323f8cSGrygorii Strashko ... 34*89323f8cSGrygorii Strashko interrupt-parent = <&kirq0>; 35*89323f8cSGrygorii Strashko interrupts = <10 2>; 36*89323f8cSGrygorii Strashko }; 37