On 04/02/19 20:15, Tony Lindgren wrote: > * Roger Quadros <rogerq@xxxxxx> [190204 14:23]: >> From: "Andrew F. Davis" <afd@xxxxxx> >> >> The Programmable Real-Time Unit Subsystem (PRUSS) contains an >> interrupt controller (INTC) that can handle various system input >> events and post interrupts back to the device-level initiators. >> The INTC can support upto 64 input events with individual control >> configuration and hardware prioritization. These events are mapped >> onto 10 interrupt signals through two levels of many-to-one mapping >> support. Different interrupt signals are routed to the individual >> PRU cores or to the host CPU. >> >> The PRUSS INTC platform driver manages this PRUSS interrupt >> controller and implements an irqchip driver to provide a Linux >> standard way for the PRU client users to enable/disable/ack/ >> re-trigger a PRUSS system event. The system events to interrupt >> channels and host interrupts relies on the mapping configuration >> provided through a firmware resource table for now. This will be >> revisited and enhanced in the future for a better interface. The >> mappings will currently be programmed during the boot/shutdown >> of the PRU. >> >> The PRUSS INTC module is reference counted during the interrupt >> setup phase through the irqchip's irq_request_resources() and >> irq_release_resources() ops. This restricts the module from being >> removed as long as there are active interrupt users. >> >> The PRUSS INTC can generate an interrupt to various processor >> subsystems on the SoC through a set of 64 possible PRU system >> events. These system events can be used by PRU client drivers >> or applications for event notifications/signalling between PRUs >> and MPU or other processors. An API, pruss_intc_trigger() is >> provided to MPU-side PRU client drivers/applications to be able >> to trigger an event/interrupt using IRQ numbers provided by the >> PRUSS-INTC irqdomain chip. > > I suggest you send the binding patch and the interrupt > controller driver separately to the irqchip guys. Maybe > put the trigger function in to a separate patch that can > be reviewed and applied separately. Good idea. I will send irqchip related patches separately. cheers, -roger > > Regards, > > Tony > -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
