Re: [PATCH 1/2] coresight: replicator: Add Qualcomm CoreSight Replicator driver
From: Mathieu Poirier
Date: Thu Apr 30 2015 - 09:07:48 EST
On 30 April 2015 at 01:21, Ivan T. Ivanov <ivan.ivanov@xxxxxxxxxx> wrote:
> On Wed, 2015-04-29 at 10:28 -0600, Mathieu Poirier wrote:
>> On 29 April 2015 at 06:19, Ivan T. Ivanov ivanov@xxxxxxxxxx> wrote:
>> > - "arm,coresight-etm4x", "arm,primecell";
>> > + - "qcom,coresight-replicator", "arm,primecell";
>> Is there some sort of versioning information we can add like it was
>> done for the "coresight-etmXY" bindings? It makes things a lot
>> cleaner when a new (and possibly not backward compatible) version gets
> From what I can see, it is version 1. I could add it to compatible
> string, but suldn't we use amba_id for this reason.
amba_id work well for devices within the same family and compatible up
to a certain point. When revisions change backward compatibility is
usually not kept and it becomes a nightmare to maintain.
>> > * reg: physical base address and length of the register
>> > set(s) of the component.
>> > diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
>> > index 6b331d4..165b681 100644
>> > --- a/drivers/hwtracing/coresight/Kconfig
>> > +++ b/drivers/hwtracing/coresight/Kconfig
>> > @@ -68,4 +68,13 @@ config CORESIGHT_SOURCE_ETM4X
>> > instructions that a processor is executing. This is primarily useful
>> > for instruction level tracing. Depending on the implemented version
>> > data tracing may also be available.
>> > +
>> > +config CORESIGHT_QCOM_REPLICATOR
>> > + bool "Qualcomm CoreSight Replicator driver"
>> > + help
>> > + This enables support for CoreSight link and sink driver that are
>> > + responsible for transporting and collecting the trace data
>> > + respectively. Link and sinks are dynamically aggregated with a trace
>> > + entity at run time to form a complete trace path.
>> The replicator is only a link entity. It is only transporting trace
>> data information rather than collecting it. Please review the
> True, sorry. copy and paste from CORESIGHT_LINKS_AND_SINKS.
>> Also, can this specific version run on both V7 and V8
>> architecture. If not the proper "depends" should be added.
> Same driver/device on both architectures.
> Will fix rest of the comments and will resend.
> Thank you,
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