From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org
Cc: mathieu.poirier@linaro.org, suzuki.poulose@arm.com,
mike.leach@linaro.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
Linu Cherian <lcherian@marvell.com>,
linux-kernel@vger.kernel.org, devicetree@vger.kernel.org,
Rob Herring <robh@kernel.org>
Subject: [PATCH V2 06/11] dts: bindings: Document device tree bindings for ETE
Date: Wed, 13 Jan 2021 09:48:13 +0530 [thread overview]
Message-ID: <1610511498-4058-7-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1610511498-4058-1-git-send-email-anshuman.khandual@arm.com>
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Document the device tree bindings for Embedded Trace Extensions.
ETE can be connected to legacy coresight components and thus
could optionally contain a connection graph as described by
the CoreSight bindings.
Cc: devicetree@vger.kernel.org
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: Rob Herring <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
Documentation/devicetree/bindings/arm/ete.yaml | 71 ++++++++++++++++++++++++++
1 file changed, 71 insertions(+)
create mode 100644 Documentation/devicetree/bindings/arm/ete.yaml
diff --git a/Documentation/devicetree/bindings/arm/ete.yaml b/Documentation/devicetree/bindings/arm/ete.yaml
new file mode 100644
index 0000000..00e6a77
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/ete.yaml
@@ -0,0 +1,71 @@
+# SPDX-License-Identifier: GPL-2.0-only or BSD-2-Clause
+# Copyright 2021, Arm Ltd
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/arm/ete.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: ARM Embedded Trace Extensions
+
+maintainers:
+ - Suzuki K Poulose <suzuki.poulose@arm.com>
+ - Mathieu Poirier <mathieu.poirier@linaro.org>
+
+description: |
+ Arm Embedded Trace Extension(ETE) is a per CPU trace component that
+ allows tracing the CPU execution. It overlaps with the CoreSight ETMv4
+ architecture and has extended support for future architecture changes.
+ The trace generated by the ETE could be stored via legacy CoreSight
+ components (e.g, TMC-ETR) or other means (e.g, using a per CPU buffer
+ Arm Trace Buffer Extension (TRBE)). Since the ETE can be connected to
+ legacy CoreSight components, a node must be listed per instance, along
+ with any optional connection graph as per the coresight bindings.
+ See bindings/arm/coresight.txt.
+
+properties:
+ $nodename:
+ pattern: "^ete([0-9a-f]+)$"
+ compatible:
+ items:
+ - const: arm,embedded-trace-extension
+
+ cpu:
+ description: |
+ Handle to the cpu this ETE is bound to.
+ $ref: /schemas/types.yaml#/definitions/phandle
+
+ out-ports:
+ description: |
+ Out put connections from the ETE to legacy CoreSight trace bus.
+ $ref: /schemas/graph.yaml#/properties/ports
+
+required:
+ - compatible
+ - cpu
+
+additionalProperties: false
+
+examples:
+
+# An ETE node without legacy CoreSight connections
+ - |
+ ete0 {
+ compatible = "arm,embedded-trace-extension";
+ cpu = <&cpu_0>;
+ };
+# An ETE node with legacy CoreSight connections
+ - |
+ ete1 {
+ compatible = "arm,embedded-trace-extension";
+ cpu = <&cpu_1>;
+
+ out-ports { /* legacy coresight connection */
+ port {
+ ete1_out_port: endpoint {
+ remote-endpoint = <&funnel_in_port0>;
+ };
+ };
+ };
+ };
+
+...
--
2.7.4
next prev parent reply other threads:[~2021-01-13 4:19 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-13 4:18 [PATCH V2 00/11] arm64: coresight: Enable ETE and TRBE Anshuman Khandual
2021-01-13 4:18 ` [PATCH V2 01/11] coresight: etm-perf: Allow an event to use different sinks Anshuman Khandual
2021-01-13 4:18 ` [PATCH V2 02/11] coresight: Do not scan for graph if none is present Anshuman Khandual
2021-01-13 4:18 ` [PATCH V2 03/11] coresight: etm4x: Add support for PE OS lock Anshuman Khandual
2021-01-13 4:18 ` [PATCH V2 04/11] coresight: ete: Add support for ETE sysreg access Anshuman Khandual
2021-01-13 4:18 ` [PATCH V2 05/11] coresight: ete: Add support for ETE tracing Anshuman Khandual
2021-01-13 4:18 ` Anshuman Khandual [this message]
2021-01-25 19:22 ` [PATCH V2 06/11] dts: bindings: Document device tree bindings for ETE Rob Herring
2021-01-25 22:20 ` Suzuki K Poulose
2021-01-25 23:28 ` Suzuki K Poulose
2021-01-13 4:18 ` [PATCH V2 07/11] arm64: Add TRBE definitions Anshuman Khandual
2021-01-13 9:21 ` Suzuki K Poulose
2021-01-15 1:52 ` Anshuman Khandual
2021-02-22 13:55 ` Catalin Marinas
2021-02-22 13:59 ` Catalin Marinas
2021-01-13 4:18 ` [PATCH V2 08/11] coresight: core: Add support for dedicated percpu sinks Anshuman Khandual
2021-01-13 9:43 ` Suzuki K Poulose
2021-01-15 2:36 ` Anshuman Khandual
2021-01-15 12:31 ` Suzuki K Poulose
2021-01-13 4:18 ` [PATCH V2 09/11] coresight: etm-perf: Truncate the perf record if handle has no space Anshuman Khandual
2021-01-13 9:48 ` Suzuki K Poulose
2021-01-13 4:18 ` [PATCH V2 10/11] coresight: sink: Add TRBE driver Anshuman Khandual
2021-01-13 15:28 ` Suzuki K Poulose
2021-01-15 5:29 ` Anshuman Khandual
2021-01-15 12:43 ` Suzuki K Poulose
2021-01-17 12:10 ` Anshuman Khandual
2021-01-13 4:18 ` [PATCH V2 11/11] dts: bindings: Document device tree bindings for Arm TRBE Anshuman Khandual
2021-01-13 15:45 ` Rob Herring
2021-01-14 10:17 ` Suzuki K Poulose
2021-01-14 14:07 ` Rob Herring
2021-01-14 14:47 ` Suzuki K Poulose
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