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Message-ID: <0b4c9c9f-02c9-45b5-b289-046ce4785325@quicinc.com>
Date: Wed, 21 Aug 2024 16:22:40 +0800
From: Jinlong Mao <quic_jinlmao@...cinc.com>
To: Suzuki K Poulose <suzuki.poulose@....com>,
Mike Leach
<mike.leach@...aro.org>, James Clark <james.clark@....com>,
Rob Herring
<robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley
<conor+dt@...nel.org>,
Alexander Shishkin
<alexander.shishkin@...ux.intel.com>
CC: <coresight@...ts.linaro.org>, <linux-arm-kernel@...ts.infradead.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v4 0/3] coresight: Add static trace id support
On 2024/7/29 15:14, Mao Jinlong wrote:
> Some HW has static trace id which cannot be changed via
> software programming. For this case, configure the trace id
> in device tree with "arm,static-trace-id = <xxx>", and
> call coresight_trace_id_get_static_system_id with the trace id value
> in device probe function. The id will be reserved for the HW
> all the time if the device is probed.
>
> Changes since V3:
> 1. Adda new API function
> int coresight_trace_id_get_system_static_id(int trace_id).
> 2. Use the term "static trace id" for these devices where
> the hardware sets a non-programmable trace ID.
>
> Changes since V2:
> 1. Change "trace-id" to "arm,trace-id".
> 2. Add trace id flag for getting preferred id or ODD id.
>
> Changes since V1:
> 1. Add argument to coresight_trace_id_get_system_id for preferred id
> instead of adding new function coresight_trace_id_reserve_system_id.
> 2. Add constraint to trace-id in dt-binding file.
>
> Mao Jinlong (3):
> dt-bindings: arm: Add arm,trace-id for coresight dummy source
> coresight: Add support to get static id for system trace sources
> coresight: dummy: Add static trace id support for dummy source
>
> .../sysfs-bus-coresight-devices-dummy-source | 15 +++++
> .../arm/arm,coresight-dummy-source.yaml | 6 ++
> drivers/hwtracing/coresight/coresight-dummy.c | 59 +++++++++++++++++--
> .../hwtracing/coresight/coresight-platform.c | 26 ++++++++
> .../hwtracing/coresight/coresight-trace-id.c | 38 ++++++++----
> .../hwtracing/coresight/coresight-trace-id.h | 9 +++
> include/linux/coresight.h | 1 +
> 7 files changed, 140 insertions(+), 14 deletions(-)
> create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-dummy-source
Hi Reviewers,
Gentle remainder for the review.
Thanks
Jinlong Mao
>
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