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Subject[PATCH 0/6] Add TI PRUSS Local Interrupt Controller IRQChip driver
Date
Hi All,

The following series adds an IRQChip driver for the local interrupt controller
present within a Programmable Real-Time Unit and Industrial Communication
Subsystem (PRU-ICSS) present on a number of TI SoCs including OMAP architecture
based AM335x, AM437x, AM57xx SoCs, Keystone 2 architecture based 66AK2G SoCs,
Davinci architecture based OMAP-L138/DA850 SoCs and the latest K3 architecture
based AM65x and J721E SoCs. This series splits out the INTC portions into a
separate stand-alone series from the previous PRUSS support patch series [1]
as requested by various maintainers. Patches are on top of latest master.

The PRUSS local INTC is a unique interrupt controller designed to map a number
of SoC-level device or internal PRUSS interrupt sources into a smaller set of
output interrupt lines that are connected to various SoC-level processors like
the host ARM, PRU cores themselves and optionally to some DSPs, other PRUSS,
DMA controllers etc. The following are some of the features:
- Capture of 64 (160 on K3) System Events/input interrupt sources
- Multiplexing of these system events onto 10 (20 on K3) output interrupt
channels in a many-to-one fashion
- Multiplexing of the output interrupt channels onto 10 (20 on K3) host
interrupts split between multiple processors. Typical integration connects
the first 2 host interrupts to PRU cores, and the next 8 host interrupts
to ARM cores.
- Independent enable and disable of system events and their mapping onto
a channel
- Independent enable and disable of host events and the mapping to host
events per interrupt channel.
- Inherent hardward prioritization of events and channels (lower number
indicates higher priority).
- Additional input interrupt sources multiplexing using either a SoC-level
CFG MMR or PRUSS CFG MMR (support will be added through PRU rproc client
bindings).

More details can be found in any of the supported SoC TRMs.
Eg: Chapter 30.1.6 of AM5728 TRM [2]

Changes from previous series include:
- Update bindings to move away from SoC-specific compatibles
- Use new DT properties to add support for shared and exclusive ARM GIC
interrupt lines
- Include support for Davinci OMAP-L138 and K3 AM65x & J721E SoCs
- Split up the driver patch into granular incremental support patches

regards
Suman

[1] https://patchwork.kernel.org/cover/10795721/
[2] http://www.ti.com/lit/pdf/spruhz6


Andrew F. Davis (2):
irqchip/irq-pruss-intc: Add a PRUSS irqchip driver for PRUSS
interrupts
irqchip/irq-pruss-intc: Add API to trigger a PRU sysevent

Suman Anna (4):
dt-bindings: irqchip: Add PRUSS interrupt controller bindings
irqchip/irq-pruss-intc: Add support for shared and invalid interrupts
irqchip/irq-pruss-intc: Add helper functions to configure internal
mapping
irqchip/irq-pruss-intc: Add support for ICSSG INTC on K3 SoCs

.../interrupt-controller/ti,pruss-intc.txt | 92 +++
drivers/irqchip/Kconfig | 10 +
drivers/irqchip/Makefile | 1 +
drivers/irqchip/irq-pruss-intc.c | 749 ++++++++++++++++++
include/linux/irqchip/irq-pruss-intc.h | 33 +
include/linux/pruss_intc.h | 26 +
6 files changed, 911 insertions(+)
create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,pruss-intc.txt
create mode 100644 drivers/irqchip/irq-pruss-intc.c
create mode 100644 include/linux/irqchip/irq-pruss-intc.h
create mode 100644 include/linux/pruss_intc.h

--
2.22.0

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