On Sun, Sep 10, 2017 at 03:49:18PM +0900, Stafford Horne wrote: > From: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx> > > IPI driver for the Open Multi-Processor Interrupt Controller (ompic) as > described in the Multicore support section of the OpenRISC 1.2 > proposed architecture specification: > > https://github.com/stffrdhrn/doc/raw/arch-1.2-proposal/openrisc-arch-1.2-rev0.pdf > > Each OpenRISC core contains a full interrupt controller which is used in > the SMP architecture for interrupt balancing. This IPI device, the > ompic, is the only external device required for enabling SMP on > OpenRISC. > > Pending ops are stored in a memory bit mask which can allow multiple > pending operations to be set and serviced at a time. This is mostly > borrowed from the alpha IPI implementation. > > Signed-off-by: Stefan Kristiansson <stefan.kristiansson@xxxxxxxxxxxxx> > [shorne@xxxxxxxxx: converted ops to bitmask, wrote commit message] > Signed-off-by: Stafford Horne <shorne@xxxxxxxxx> > --- > > Changes since v1 > - Added openrisc, prefix > - Clarified 8 bytes per cpu > - Removed #interrupt-cells as this will not be an irq parent You should still have #interrupt-cells as that is required with "interrupt-controller". It could be 0 though. > - Changed ops to be percpu > - Added DTS and intialization failure validations > > .../interrupt-controller/openrisc,ompic.txt | 19 ++ > arch/openrisc/Kconfig | 1 + > drivers/irqchip/Kconfig | 3 + > drivers/irqchip/Makefile | 1 + > drivers/irqchip/irq-ompic.c | 205 +++++++++++++++++++++ > 5 files changed, 229 insertions(+) > create mode 100644 Documentation/devicetree/bindings/interrupt-controller/openrisc,ompic.txt > create mode 100644 drivers/irqchip/irq-ompic.c > > diff --git a/Documentation/devicetree/bindings/interrupt-controller/openrisc,ompic.txt b/Documentation/devicetree/bindings/interrupt-controller/openrisc,ompic.txt > new file mode 100644 > index 000000000000..346e6042d62f > --- /dev/null > +++ b/Documentation/devicetree/bindings/interrupt-controller/openrisc,ompic.txt > @@ -0,0 +1,19 @@ > +Open Multi-Processor Interrupt Controller > + > +Required properties: > + > +- compatible : This should be "openrisc,ompic" > +- reg : Specifies base physical address and size of the register space. The > + size is based on the number of cores the controller has been configured > + to handle, this should be set to 8 bytes per cpu core. > +- interrupt-controller : Identifies the node as an interrupt controller > +- interrupts : Specifies the interrupt line to which the ompic is wired. > + > +Example: > + > +ompic: ompic { interrupt-controller@98000000 { > + compatible = "openrisc,ompic"; > + reg = <0x98000000 16>; > + interrupt-controller; > + interrupts = <1>; > +}; -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
