linux-phytec-ti

irqchip/irq-pruss-intc: Add API to trigger a PRU sysevent

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. A new 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.

Signed-off-by: Andrew F. Davis <afd@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>