Thread (17 messages) 17 messages, 5 authors, 2013-01-03

Re: [RFC 2/5] ARM: dts: Add Cross Trigger Interface binding

From: Will Deacon <hidden>
Date: 2012-12-13 17:41:40
Also in: linux-arm-kernel, linux-omap

On Wed, Dec 12, 2012 at 09:43:05PM +0000, Jon Hunter wrote:
quoted hunk ↗ jump to hunk
Adds a device-tree binding for the ARM Cross Trigger Interface (CTI).
The ARM Cross Trigger Interface provides a way to route events between
processor modules. For example, on OMAP4430 we use the CTI module to
route PMU events to the GIC interrupt module.

Signed-off-by: Jon Hunter <redacted>
---
 Documentation/devicetree/bindings/arm/cti.txt |   32 +++++++++++++++++++++++++
 1 file changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/cti.txt
diff --git a/Documentation/devicetree/bindings/arm/cti.txt b/Documentation/devicetree/bindings/arm/cti.txt
new file mode 100644
index 0000000..4a0e2d3
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/cti.txt
@@ -0,0 +1,32 @@
+* ARM Cross Trigger Interface (CTI)
+
+The ARM Cross Trigger Interface provides a way to route events between
+processor modules. For example, debug events from one processor can be
+broadcasted to other processors. The events that can be routed between
+processors are specific to the device.
+
+Required properties:
+
+- compatible:			Should be "arm,primecell".
+- interrupts:			Interrupt associated with CTI module.
+- reg:				Contains timer register address range (base
+				address and length).
+- arm,cti-name:			A unique name for the CTI module, that will be
+				used when requesting the CTI module instance.
+
+
+Optional properties:
+
+- arm-primecell-periphid:	Primecell peripheral ID associated with CTI
+				module.
For multi-cluster systems, I wouldn't be surprised to see multiple CTI
instances, each with different CPU affinities. Can we include an affinity
property following Mark's proposed binding?

  http://lists.infradead.org/pipermail/linux-arm-kernel/2012-December/137290.html

Will
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