forked from Minki/linux
89323f8c50
On Keystone SOCs, DSP cores can send interrupts to ARM host using the IRQ controller IP. It provides 28 IRQ signals to ARM. The IRQ handler running on HOST OS can identify DSP signal source by analyzing SRCCx bits in IPCARx registers. This is one of the component used by the IPC mechanism used on Keystone SOCs. Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Link: https://lkml.kernel.org/r/1406126430-9978-1-git-send-email-grygorii.strashko@ti.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>
37 lines
1.2 KiB
Plaintext
37 lines
1.2 KiB
Plaintext
Keystone 2 IRQ controller IP
|
|
|
|
On Keystone SOCs, DSP cores can send interrupts to ARM
|
|
host using the IRQ controller IP. It provides 28 IRQ signals to ARM.
|
|
The IRQ handler running on HOST OS can identify DSP signal source by
|
|
analyzing SRCCx bits in IPCARx registers. This is one of the component
|
|
used by the IPC mechanism used on Keystone SOCs.
|
|
|
|
Required Properties:
|
|
- compatible: should be "ti,keystone-irq"
|
|
- ti,syscon-dev : phandle and offset pair. The phandle to syscon used to
|
|
access device control registers and the offset inside
|
|
device control registers range.
|
|
- interrupt-controller : Identifies the node as an interrupt controller
|
|
- #interrupt-cells : Specifies the number of cells needed to encode interrupt
|
|
source should be 1.
|
|
- interrupts: interrupt reference to primary interrupt controller
|
|
|
|
Please refer to interrupts.txt in this directory for details of the common
|
|
Interrupt Controllers bindings used by client devices.
|
|
|
|
Example:
|
|
kirq0: keystone_irq0@026202a0 {
|
|
compatible = "ti,keystone-irq";
|
|
ti,syscon-dev = <&devctrl 0x2a0>;
|
|
interrupts = <GIC_SPI 4 IRQ_TYPE_EDGE_RISING>;
|
|
interrupt-controller;
|
|
#interrupt-cells = <1>;
|
|
};
|
|
|
|
dsp0: dsp0 {
|
|
compatible = "linux,rproc-user";
|
|
...
|
|
interrupt-parent = <&kirq0>;
|
|
interrupts = <10 2>;
|
|
};
|