linux-kernel - [RFC 11/11] dts: bindings: Document device tree binding for Arm TRBE

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Message-Id: <1605012309-24812-12-git-send-email-anshuman.khandual@arm.com>
Date:   Tue, 10 Nov 2020 18:15:09 +0530
From:   Anshuman Khandual <anshuman.khandual@....com>
To:     linux-arm-kernel@...ts.infradead.org, coresight@...ts.linaro.org
Cc:     linux-kernel@...r.kernel.org, suzuki.poulose@....com,
        mathieu.poirier@...aro.org, mike.leach@...aro.org,
        Anshuman Khandual <anshuman.khandual@....com>
Subject: [RFC 11/11] dts: bindings: Document device tree binding for Arm TRBE

This patch documents the device tree binding in use for Arm TRBE.

Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 Documentation/devicetree/bindings/arm/trbe.txt | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/trbe.txt

diff --git a/Documentation/devicetree/bindings/arm/trbe.txt b/Documentation/devicetree/bindings/arm/trbe.txt
new file mode 100644
index 0000000..4bb5b09
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/trbe.txt
@@ -0,0 +1,20 @@
+* Trace Buffer Extension (TRBE)
+
+Trace Buffer Extension (TRBE) is used for collecting trace data generated
+from a corresponding trace unit (ETE) using an in memory trace buffer.
+
+** TRBE Required properties:
+
+- compatible : should be one of:
+	       "arm,arm-trbe"
+
+- interrupts : Exactly 1 PPI must be listed. For heterogeneous systems where
+	       TRBE is only supported on a subset of the CPUs, please consult
+	       the arm,gic-v3 binding for details on describing a PPI partition.
+
+** Example:
+
+trbe {
+	compatible = "arm,arm-trbe";
+	interrupts = <GIC_PPI 15 IRQ_TYPE_LEVEL_HIGH>;
+};
-- 
2.7.4