linux-kernel - Re: [PATCH] coresight: core: Add sysfs node to reset all sources and sinks

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Message-ID: <bb6c9df9-af9b-873e-85bd-a29d00bb39d7@arm.com>
Date:   Wed, 8 Feb 2023 16:36:40 +0000
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     Mike Leach <mike.leach@...aro.org>,
        Mao Jinlong <quic_jinlmao@...cinc.com>
Cc:     Mathieu Poirier <mathieu.poirier@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Tingwei Zhang <quic_tingweiz@...cinc.com>,
        Yuanfang Zhang <quic_yuanfang@...cinc.com>,
        Tao Zhang <quic_taozha@...cinc.com>,
        Hao Zhang <quic_hazha@...cinc.com>
Subject: Re: [PATCH] coresight: core: Add sysfs node to reset all sources and
 sinks

On 08/02/2023 16:20, Mike Leach wrote:
> Quick correction - you need to look for enable_source  / enable_sink
> files and disable those that are currently '1'
> 
> Mike
> 
> On Wed, 8 Feb 2023 at 16:16, Mike Leach <mike.leach@...aro.org> wrote:
>>
>> Hi
>>
>> As this is a sysfs only update - would it not be easier to simply use
>> a shell script to iterate through coresight/devices/ looking for
>> disable_source / disable_sink files and setting those accordingly?
>>
>> See tools/perf/tests/shell/test_arm_coresight.sh for an example of a
>> script that does similar iteration to test coresight in perf
>>

+1

Suzuki