TI AM65x SoC based on K3 architecture introduced support for Events which are message based interrupts with minimal latency. These events are not compatible with regular interrupts and are valid only through an event transport lane. An Interrupt Aggregator(INTA) is introduced to convert these events to interrupts. INTA can also group 64 events into a single interrupt. Now the SoC has many peripherals and a large number of event sources (time sync or DMA), the use of events is completely dependent on a user's specific application, which drives a need for maximum flexibility in which event sources are used in the system. It is also completely up to software control as to how the events are serviced. Because of the huge flexibility there are certain standard peripherals (like GPIO etc)where all interrupts cannot be directly corrected to host interrupt controller. For this purpose, Interrupt Router(INTR) is introduced in the SoC. INTR just does a classic interrupt redirection. So the SoC has 3 types of interrupt controllers: - GIC500 - Interrupt Router - Interrupt Aggregator Below is a diagrammatic view of how SoC integration of these interrupt controllers:(https://pastebin.ubuntu.com/p/9ngV3jdGj2/) Device Index-x Device Index-y | | | | .... \ / \ / \ (global events) / +---------------------------+ +---------+ | | | | | INTA | | GPIO | | | | | +---------------------------+ +---------+ | (vint) | | | \|/ | +---------------------------+ | | |<-------+ | INTR | | | +---------------------------+ | | \|/ (gic irq) +---------------------------+ | | | GIC | | | +---------------------------+ While at it, TISCI abstracts the handling of all above IRQ routes where interrupt sources are not directly connected to host interrupt controller. That would be configuration of Interrupt Aggregator and Interrupt Router. This series adds support for: - TISCI commands needed for IRQ configuration - Interrupt Router(INTR) and Interrupt Aggregator(INTA) drivers Changes since v4: - Mentioned the changes in each patch Changes since v3: - Fix documentation for Interrupt Router driver - Rebased on top of latest next. - Fully tested with DMA(using out of tree patches) - Fixed a build error with allmodconfig Grygorii Strashko (1): firmware: ti_sci: Add support to get TISCI handle using of_phandle Lokesh Vutla (8): firmware: ti_sci: Add support for RM core ops firmware: ti_sci: Add support for IRQ management dt-bindings: irqchip: Introduce TISCI Interrupt router bindings irqchip: ti-sci-intr: Add support for Interrupt Router driver dt-bindings: irqchip: Introduce TISCI Interrupt Aggregator bindings irqchip: ti-sci-inta: Add support for Interrupt Aggregator driver soc: ti: Add MSI domain support for K3 Interrupt Aggregator soc: ti: am6: Enable interrupt controller drivers Peter Ujfalusi (1): firmware: ti_sci: Add RM mapping table for am654 .../bindings/arm/keystone/ti,sci.txt | 3 +- .../interrupt-controller/ti,sci-inta.txt | 74 +++ .../interrupt-controller/ti,sci-intr.txt | 85 +++ MAINTAINERS | 6 + drivers/firmware/ti_sci.c | 536 ++++++++++++++++++ drivers/firmware/ti_sci.h | 102 ++++ drivers/irqchip/Kconfig | 23 + drivers/irqchip/Makefile | 2 + drivers/irqchip/irq-ti-sci-common.c | 131 +++++ drivers/irqchip/irq-ti-sci-common.h | 59 ++ drivers/irqchip/irq-ti-sci-inta.c | 531 +++++++++++++++++ drivers/irqchip/irq-ti-sci-intr.c | 315 ++++++++++ drivers/soc/ti/Kconfig | 11 + drivers/soc/ti/Makefile | 1 + drivers/soc/ti/k3_inta_msi.c | 143 +++++ include/linux/irqdomain.h | 1 + include/linux/msi.h | 7 + include/linux/soc/ti/k3_inta_msi.h | 21 + include/linux/soc/ti/ti_sci_protocol.h | 72 +++ 19 files changed, 2122 insertions(+), 1 deletion(-) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.txt create mode 100644 Documentation/devicetree/bindings/interrupt-controller/ti,sci-intr.txt create mode 100644 drivers/irqchip/irq-ti-sci-common.c create mode 100644 drivers/irqchip/irq-ti-sci-common.h create mode 100644 drivers/irqchip/irq-ti-sci-inta.c create mode 100644 drivers/irqchip/irq-ti-sci-intr.c create mode 100644 drivers/soc/ti/k3_inta_msi.c create mode 100644 include/linux/soc/ti/k3_inta_msi.h -- 2.19.2
