linux-kernel - Re: [PATCH 1/9 v2] coresight: add CoreSight core layer framework

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Message-ID: <CANLsYkzEHCyPJNfWVKOq-=LU73FN=G7fkqWmKKPcLQB1idFKQA@mail.gmail.com>
Date:	Wed, 2 Jul 2014 11:18:39 -0600
From:	Mathieu Poirier <mathieu.poirier@...aro.org>
To:	Dirk Behme <dirk.behme@...bosch.com>
Cc:	Linus Walleij <linus.walleij@...aro.org>,
	Will Deacon <will.deacon@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Daniel Thompson <daniel.thompson@...aro.org>,
	Rob Herring <robherring2@...il.com>,
	Robert Marklund <robbelibobban@...il.com>,
	Al Grant <Al.Grant@....com>,
	Patch Tracking <patches@...aro.org>,
	Marcin Jabrzyk <marcin.jabrzyk@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...aro.org>,
	Panchaxari Prasannamurthy Tumkur 
	<panchaxari.prasannamurthy@...aro.org>, r.sengupta@...sung.com,
	Arve Hjønnevåg <arve@...roid.com>,
	Tony Armitstead <Tony.Armitstead@....com>,
	John Stultz <john.stultz@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	James King <james.king@...aro.org>,
	Pratik Patel <pratikp@...eaurora.org>,
	Vikas Varshney <varshney@...com>,
	Jonas Svennebring <jonas.svennebring@...gotech.com>
Subject: Re: [PATCH 1/9 v2] coresight: add CoreSight core layer framework

On 30 June 2014 04:53, Dirk Behme <dirk.behme@...bosch.com> wrote:
> On 27.06.2014 20:04, mathieu.poirier@...aro.org wrote:
>>
>> From: Pratik Patel <pratikp@...eaurora.org>
>>
>> CoreSight components are compliant with the ARM CoreSight
>> architecture specification and can be connected in various
>> topologies to suite a particular SoCs tracing needs. These trace
>> components can generally be classified as sources, links and
>> sinks. Trace data produced by one or more sources flows through
>> the intermediate links connecting the source to the currently
>> selected sink.
>>
>> CoreSight framework provides an interface for the CoreSight trace
>> drivers to register themselves with. It's intended to build up a
>> topological view of the CoreSight components and configure the
>> right series of components on user input via debugfs.
>>
>> For eg., when enabling a source, framework builds up a path
>> consisting of all the components connecting the source to the
>> currently selected sink and enables all of them.
>>
>> Framework also supports switching between available sinks and
>> also provides status information to user space applications
>> through the debugfs interface.
>>
>> Signed-off-by: Pratik Patel <pratikp@...eaurora.org>
>> Signed-off-by: Panchaxari Prasannamurthy
>> <panchaxari.prasannamurthy@...aro.org>
>> Signed-off-by: Mathieu Poirier <mathieu.poirier@...aro.org>
>> ---
>>   .../devicetree/bindings/arm/coresight.txt          | 141 +++++
>>   drivers/Kconfig                                    |   2 +
>
>
> I wonder if
>
> arch/arm/Kconfig.debug
>
> wouldn't be better place for this?

With the other kernel hacking options - right, that is probably best.

>
> Best regards
>
> Dirk
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