Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
78 lines
2.1 KiB
YAML
78 lines
2.1 KiB
YAML
# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
|
|
# Copyright 2021, Arm Ltd
|
|
%YAML 1.2
|
|
---
|
|
$id: http://devicetree.org/schemas/arm/arm,embedded-trace-extension.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.
|
|
|
|
properties:
|
|
$nodename:
|
|
pattern: "^ete(-[0-9]+)?$"
|
|
compatible:
|
|
items:
|
|
- const: arm,embedded-trace-extension
|
|
|
|
cpu:
|
|
description: |
|
|
Handle to the cpu this ETE is bound to.
|
|
$ref: /schemas/types.yaml#/definitions/phandle
|
|
|
|
power-domains:
|
|
maxItems: 1
|
|
|
|
out-ports:
|
|
description: |
|
|
Output connections from the ETE to legacy CoreSight trace bus.
|
|
$ref: /schemas/graph.yaml#/properties/ports
|
|
properties:
|
|
port:
|
|
description: Output connection from the ETE to legacy CoreSight Trace bus.
|
|
$ref: /schemas/graph.yaml#/properties/port
|
|
|
|
required:
|
|
- compatible
|
|
- cpu
|
|
|
|
additionalProperties: false
|
|
|
|
examples:
|
|
|
|
# An ETE node without legacy CoreSight connections
|
|
- |
|
|
ete-0 {
|
|
compatible = "arm,embedded-trace-extension";
|
|
cpu = <&cpu_0>;
|
|
};
|
|
# An ETE node with legacy CoreSight connections
|
|
- |
|
|
ete-1 {
|
|
compatible = "arm,embedded-trace-extension";
|
|
cpu = <&cpu_1>;
|
|
|
|
out-ports { /* legacy coresight connection */
|
|
port {
|
|
ete1_out_port: endpoint {
|
|
remote-endpoint = <&funnel_in_port0>;
|
|
};
|
|
};
|
|
};
|
|
};
|
|
|
|
...
|