[PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[Suzuki K Poulose]

The Linux coresight drivers define the programmable ATB replicator as
Qualcom replicator, while this is designed by ARM. This can cause confusion
to a user selecting the driver. Cleanup all references to make it
 explicitly clear. This patch :

 1) Adds a new compatible string for the same, retaining the old one for
    compatibility.
 2) Changes the Kconfig symbol (since this is not part of any defconfigs)
	 CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
 3) Improves the help message in the Kconfig.
 4) Changes the name of the driver :
	coresight-replicator-qcom => coresight-dynamic-replicator

Cc: Pratik Patel <pratikp@codeaurora.org>
Cc: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: devicetree@vger.kernel.org
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
 Documentation/devicetree/bindings/arm/coresight.txt     |  4 +++-
 drivers/hwtracing/coresight/Kconfig                     | 10 +++++-----
 drivers/hwtracing/coresight/Makefile                    |  2 +-
 drivers/hwtracing/coresight/coresight-replicator-qcom.c |  2 +-
 4 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
index fcbae6a..f77329f 100644
--- a/Documentation/devicetree/bindings/arm/coresight.txt
+++ b/Documentation/devicetree/bindings/arm/coresight.txt
@@ -34,7 +34,9 @@ its hardware characteristcs.
 		- Embedded Trace Macrocell (version 4.x):
 			"arm,coresight-etm4x", "arm,primecell";
 
-		- Qualcomm Configurable Replicator (version 1.x):
+		- Coresight programmable Replicator (version 1.x):
+			"arm,coresight-dynamic-replicator", "arm,primecell";
+				OR
 			"qcom,coresight-replicator1x", "arm,primecell";
 
 		- System Trace Macrocell:
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index 8d55d6d..e50ea56 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig
@@ -70,13 +70,13 @@ config CORESIGHT_SOURCE_ETM4X
 	  for instruction level tracing. Depending on the implemented version
 	  data tracing may also be available.
 
-config CORESIGHT_QCOM_REPLICATOR
-	bool "Qualcomm CoreSight Replicator driver"
+config CORESIGHT_DYNAMIC_REPLICATOR
+	bool "Programmable CoreSight Replicator driver"
 	depends on CORESIGHT_LINKS_AND_SINKS
 	help
-	  This enables support for Qualcomm CoreSight link driver. The
-	  programmable ATB replicator sends the ATB trace stream from the
-	  ETB/ETF to the TPIUi and ETR.
+	  This enables support for dynamic CoreSight replicator link driver.
+	  The programmable ATB replicator allows independent filtering of the
+	  trace data based on the traceid.
 
 config CORESIGHT_STM
 	bool "CoreSight System Trace Macrocell driver"
diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
index 433d590..c7638d4 100644
--- a/drivers/hwtracing/coresight/Makefile
+++ b/drivers/hwtracing/coresight/Makefile
@@ -14,6 +14,6 @@ obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o coresight-etm-cp14.o \
 					coresight-etm3x-sysfs.o
 obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
 					coresight-etm4x-sysfs.o
-obj-$(CONFIG_CORESIGHT_QCOM_REPLICATOR) += coresight-replicator-qcom.o
+obj-$(CONFIG_CORESIGHT_DYNAMIC_REPLICATOR) += coresight-replicator-qcom.o
 obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
 obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
diff --git a/drivers/hwtracing/coresight/coresight-replicator-qcom.c b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
index 0a3d15f..b7e44d1 100644
--- a/drivers/hwtracing/coresight/coresight-replicator-qcom.c
+++ b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
@@ -186,7 +186,7 @@ static struct amba_id replicator_ids[] = {
 
 static struct amba_driver replicator_driver = {
 	.drv = {
-		.name	= "coresight-replicator-qcom",
+		.name	= "coresight-dynamic-replicator",
 		.pm	= &replicator_dev_pm_ops,
 		.suppress_bind_attrs = true,
 	},
-- 
2.7.4

Re: [PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[Mathieu Poirier]

On Mon, Jun 12, 2017 at 03:36:40PM +0100, Suzuki K Poulose wrote:
> The Linux coresight drivers define the programmable ATB replicator as
> Qualcom replicator, while this is designed by ARM. This can cause confusion
> to a user selecting the driver. Cleanup all references to make it
>  explicitly clear. This patch :
> 
>  1) Adds a new compatible string for the same, retaining the old one for
>     compatibility.
>  2) Changes the Kconfig symbol (since this is not part of any defconfigs)
> 	 CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
>  3) Improves the help message in the Kconfig.
>  4) Changes the name of the driver :
> 	coresight-replicator-qcom => coresight-dynamic-replicator
> 
> Cc: Pratik Patel <pratikp-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
> Cc: Ivan T. Ivanov <ivan.ivanov-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: Mathieu Poirier <mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
> Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
> Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
> Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose-5wv7dgnIgG8@public.gmane.org>

Hi Suzuki,

> ---
>  Documentation/devicetree/bindings/arm/coresight.txt     |  4 +++-
>  drivers/hwtracing/coresight/Kconfig                     | 10 +++++-----
>  drivers/hwtracing/coresight/Makefile                    |  2 +-
>  drivers/hwtracing/coresight/coresight-replicator-qcom.c |  2 +-
>  4 files changed, 10 insertions(+), 8 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> index fcbae6a..f77329f 100644
> --- a/Documentation/devicetree/bindings/arm/coresight.txt
> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> @@ -34,7 +34,9 @@ its hardware characteristcs.
>  		- Embedded Trace Macrocell (version 4.x):
>  			"arm,coresight-etm4x", "arm,primecell";
>  
> -		- Qualcomm Configurable Replicator (version 1.x):
> +		- Coresight programmable Replicator (version 1.x):
> +			"arm,coresight-dynamic-replicator", "arm,primecell";
> +				OR
>  			"qcom,coresight-replicator1x", "arm,primecell";

Rob, what's your view on keeping the old binding around?  We could simply change
the two occurences we find in the DTs (Juno and 410c) to the new name and be
done with the old one.

>  
>  		- System Trace Macrocell:
> diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
> index 8d55d6d..e50ea56 100644
> --- a/drivers/hwtracing/coresight/Kconfig
> +++ b/drivers/hwtracing/coresight/Kconfig
> @@ -70,13 +70,13 @@ config CORESIGHT_SOURCE_ETM4X
>  	  for instruction level tracing. Depending on the implemented version
>  	  data tracing may also be available.
>  
> -config CORESIGHT_QCOM_REPLICATOR
> -	bool "Qualcomm CoreSight Replicator driver"
> +config CORESIGHT_DYNAMIC_REPLICATOR
> +	bool "Programmable CoreSight Replicator driver"
>  	depends on CORESIGHT_LINKS_AND_SINKS
>  	help
> -	  This enables support for Qualcomm CoreSight link driver. The
> -	  programmable ATB replicator sends the ATB trace stream from the
> -	  ETB/ETF to the TPIUi and ETR.
> +	  This enables support for dynamic CoreSight replicator link driver.
> +	  The programmable ATB replicator allows independent filtering of the
> +	  trace data based on the traceid.
>  
>  config CORESIGHT_STM
>  	bool "CoreSight System Trace Macrocell driver"
> diff --git a/drivers/hwtracing/coresight/Makefile b/drivers/hwtracing/coresight/Makefile
> index 433d590..c7638d4 100644
> --- a/drivers/hwtracing/coresight/Makefile
> +++ b/drivers/hwtracing/coresight/Makefile
> @@ -14,6 +14,6 @@ obj-$(CONFIG_CORESIGHT_SOURCE_ETM3X) += coresight-etm3x.o coresight-etm-cp14.o \
>  					coresight-etm3x-sysfs.o
>  obj-$(CONFIG_CORESIGHT_SOURCE_ETM4X) += coresight-etm4x.o \
>  					coresight-etm4x-sysfs.o
> -obj-$(CONFIG_CORESIGHT_QCOM_REPLICATOR) += coresight-replicator-qcom.o
> +obj-$(CONFIG_CORESIGHT_DYNAMIC_REPLICATOR) += coresight-replicator-qcom.o
>  obj-$(CONFIG_CORESIGHT_STM) += coresight-stm.o
>  obj-$(CONFIG_CORESIGHT_CPU_DEBUG) += coresight-cpu-debug.o
> diff --git a/drivers/hwtracing/coresight/coresight-replicator-qcom.c b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
> index 0a3d15f..b7e44d1 100644
> --- a/drivers/hwtracing/coresight/coresight-replicator-qcom.c
> +++ b/drivers/hwtracing/coresight/coresight-replicator-qcom.c

While at it, I would also change the name of the file.

Thanks,
Mathieu

> @@ -186,7 +186,7 @@ static struct amba_id replicator_ids[] = {
>  
>  static struct amba_driver replicator_driver = {
>  	.drv = {
> -		.name	= "coresight-replicator-qcom",
> +		.name	= "coresight-dynamic-replicator",
>  		.pm	= &replicator_dev_pm_ops,
>  		.suppress_bind_attrs = true,
>  	},
> -- 
> 2.7.4
> 
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Re: [PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[Suzuki K Poulose]

On 13/06/17 17:55, Mathieu Poirier wrote:
> On Mon, Jun 12, 2017 at 03:36:40PM +0100, Suzuki K Poulose wrote:
>> The Linux coresight drivers define the programmable ATB replicator as
>> Qualcom replicator, while this is designed by ARM. This can cause confusion
>> to a user selecting the driver. Cleanup all references to make it
>>  explicitly clear. This patch :
>>
>>  1) Adds a new compatible string for the same, retaining the old one for
>>     compatibility.
>>  2) Changes the Kconfig symbol (since this is not part of any defconfigs)
>> 	 CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
>>  3) Improves the help message in the Kconfig.
>>  4) Changes the name of the driver :
>> 	coresight-replicator-qcom => coresight-dynamic-replicator
>>
>> Cc: Pratik Patel <pratikp@codeaurora.org>
>> Cc: Ivan T. Ivanov <ivan.ivanov@linaro.org>
>> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Cc: devicetree@vger.kernel.org
>> Cc: Rob Herring <robh+dt@kernel.org>
>> Cc: Mark Rutland <mark.rutland@arm.com>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>
> Hi Suzuki,
>
>> ---
>>  Documentation/devicetree/bindings/arm/coresight.txt     |  4 +++-
>>  drivers/hwtracing/coresight/Kconfig                     | 10 +++++-----
>>  drivers/hwtracing/coresight/Makefile                    |  2 +-
>>  drivers/hwtracing/coresight/coresight-replicator-qcom.c |  2 +-
>>  4 files changed, 10 insertions(+), 8 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
>> index fcbae6a..f77329f 100644
>> --- a/Documentation/devicetree/bindings/arm/coresight.txt
>> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
>> @@ -34,7 +34,9 @@ its hardware characteristcs.
>>  		- Embedded Trace Macrocell (version 4.x):
>>  			"arm,coresight-etm4x", "arm,primecell";
>>
>> -		- Qualcomm Configurable Replicator (version 1.x):
>> +		- Coresight programmable Replicator (version 1.x):
>> +			"arm,coresight-dynamic-replicator", "arm,primecell";
>> +				OR
>>  			"qcom,coresight-replicator1x", "arm,primecell";
>
> Rob, what's your view on keeping the old binding around?  We could simply change
> the two occurences we find in the DTs (Juno and 410c) to the new name and be
> done with the old one.

...

>> --- a/drivers/hwtracing/coresight/coresight-replicator-qcom.c
>> +++ b/drivers/hwtracing/coresight/coresight-replicator-qcom.c
>
> While at it, I would also change the name of the file.

Sure, will do.

Thanks
Suzuki

Re: [PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[Rob Herring]

On Tue, Jun 13, 2017 at 10:55:28AM -0600, Mathieu Poirier wrote:
> On Mon, Jun 12, 2017 at 03:36:40PM +0100, Suzuki K Poulose wrote:
> > The Linux coresight drivers define the programmable ATB replicator as
> > Qualcom replicator, while this is designed by ARM. This can cause confusion
> > to a user selecting the driver. Cleanup all references to make it
> >  explicitly clear. This patch :
> > 
> >  1) Adds a new compatible string for the same, retaining the old one for
> >     compatibility.
> >  2) Changes the Kconfig symbol (since this is not part of any defconfigs)
> > 	 CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
> >  3) Improves the help message in the Kconfig.
> >  4) Changes the name of the driver :
> > 	coresight-replicator-qcom => coresight-dynamic-replicator
> > 
> > Cc: Pratik Patel <pratikp@codeaurora.org>
> > Cc: Ivan T. Ivanov <ivan.ivanov@linaro.org>
> > Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> > Cc: devicetree@vger.kernel.org
> > Cc: Rob Herring <robh+dt@kernel.org>
> > Cc: Mark Rutland <mark.rutland@arm.com>
> > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> 
> Hi Suzuki,
> 
> > ---
> >  Documentation/devicetree/bindings/arm/coresight.txt     |  4 +++-
> >  drivers/hwtracing/coresight/Kconfig                     | 10 +++++-----
> >  drivers/hwtracing/coresight/Makefile                    |  2 +-
> >  drivers/hwtracing/coresight/coresight-replicator-qcom.c |  2 +-
> >  4 files changed, 10 insertions(+), 8 deletions(-)
> > 
> > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> > index fcbae6a..f77329f 100644
> > --- a/Documentation/devicetree/bindings/arm/coresight.txt
> > +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> > @@ -34,7 +34,9 @@ its hardware characteristcs.
> >  		- Embedded Trace Macrocell (version 4.x):
> >  			"arm,coresight-etm4x", "arm,primecell";
> >  
> > -		- Qualcomm Configurable Replicator (version 1.x):
> > +		- Coresight programmable Replicator (version 1.x):
> > +			"arm,coresight-dynamic-replicator", "arm,primecell";
> > +				OR
> >  			"qcom,coresight-replicator1x", "arm,primecell";
> 
> Rob, what's your view on keeping the old binding around?  We could simply change
> the two occurences we find in the DTs (Juno and 410c) to the new name and be
> done with the old one.

Juno uses the Qcom string? We should keep the old string. You can switch 
the dts files, but the driver should support the old name.

Acked-by: Rob Herring <robh@kernel.org>

Re: [PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[Mathieu Poirier]

On 18 June 2017 at 08:04, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> On Tue, Jun 13, 2017 at 10:55:28AM -0600, Mathieu Poirier wrote:
>> On Mon, Jun 12, 2017 at 03:36:40PM +0100, Suzuki K Poulose wrote:
>> > The Linux coresight drivers define the programmable ATB replicator as
>> > Qualcom replicator, while this is designed by ARM. This can cause confusion
>> > to a user selecting the driver. Cleanup all references to make it
>> >  explicitly clear. This patch :
>> >
>> >  1) Adds a new compatible string for the same, retaining the old one for
>> >     compatibility.
>> >  2) Changes the Kconfig symbol (since this is not part of any defconfigs)
>> >      CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
>> >  3) Improves the help message in the Kconfig.
>> >  4) Changes the name of the driver :
>> >     coresight-replicator-qcom => coresight-dynamic-replicator
>> >
>> > Cc: Pratik Patel <pratikp-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
>> > Cc: Ivan T. Ivanov <ivan.ivanov-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> > Cc: Mathieu Poirier <mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>> > Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>> > Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>> > Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
>> > Signed-off-by: Suzuki K Poulose <suzuki.poulose-5wv7dgnIgG8@public.gmane.org>
>>
>> Hi Suzuki,
>>
>> > ---
>> >  Documentation/devicetree/bindings/arm/coresight.txt     |  4 +++-
>> >  drivers/hwtracing/coresight/Kconfig                     | 10 +++++-----
>> >  drivers/hwtracing/coresight/Makefile                    |  2 +-
>> >  drivers/hwtracing/coresight/coresight-replicator-qcom.c |  2 +-
>> >  4 files changed, 10 insertions(+), 8 deletions(-)
>> >
>> > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
>> > index fcbae6a..f77329f 100644
>> > --- a/Documentation/devicetree/bindings/arm/coresight.txt
>> > +++ b/Documentation/devicetree/bindings/arm/coresight.txt
>> > @@ -34,7 +34,9 @@ its hardware characteristcs.
>> >             - Embedded Trace Macrocell (version 4.x):
>> >                     "arm,coresight-etm4x", "arm,primecell";
>> >
>> > -           - Qualcomm Configurable Replicator (version 1.x):
>> > +           - Coresight programmable Replicator (version 1.x):
>> > +                   "arm,coresight-dynamic-replicator", "arm,primecell";
>> > +                           OR
>> >                     "qcom,coresight-replicator1x", "arm,primecell";
>>
>> Rob, what's your view on keeping the old binding around?  We could simply change
>> the two occurences we find in the DTs (Juno and 410c) to the new name and be
>> done with the old one.
>
> Juno uses the Qcom string? We should keep the old string. You can switch
> the dts files, but the driver should support the old name.

When we first started working on CoreSight programmable replicators
were available but the documentation wasn't public.  As such when I
saw Qualcomm's design I mistakenly thought it was a custom IP block
and came up with a compatible string that reflected that reality.
Fast forward 3 years the documentation is available and Juno has used
the same IP block in their design.  Suzuki's patch rectifies history
by changing the programmable replicator naming convention to what it
should have been from the start.

That being said, we can keep the old compatible string around but it
won't change anything.  CoreSight devices are discovered on the AMBA
bus and don't use the compatible string - drivers are probed based on
AMBA IDs laid out in the drivers and device IDs found in HW ID
registers.

In light of the above let me know what you want to do.

Thanks,
Mathieu

>
> Acked-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
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Re: [PATCH 01/12] coresight replicator: Cleanup programmable replicator naming

[Rob Herring]

On Tue, Jun 20, 2017 at 11:44 AM, Mathieu Poirier
<mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org> wrote:
> On 18 June 2017 at 08:04, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
>> On Tue, Jun 13, 2017 at 10:55:28AM -0600, Mathieu Poirier wrote:
>>> On Mon, Jun 12, 2017 at 03:36:40PM +0100, Suzuki K Poulose wrote:
>>> > The Linux coresight drivers define the programmable ATB replicator as
>>> > Qualcom replicator, while this is designed by ARM. This can cause confusion
>>> > to a user selecting the driver. Cleanup all references to make it
>>> >  explicitly clear. This patch :
>>> >
>>> >  1) Adds a new compatible string for the same, retaining the old one for
>>> >     compatibility.
>>> >  2) Changes the Kconfig symbol (since this is not part of any defconfigs)
>>> >      CORESIGHT_QCOM_REPLICATOR => CORESIGHT_DYNAMIC_REPLICATOR
>>> >  3) Improves the help message in the Kconfig.
>>> >  4) Changes the name of the driver :
>>> >     coresight-replicator-qcom => coresight-dynamic-replicator
>>> >
>>> > Cc: Pratik Patel <pratikp-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
>>> > Cc: Ivan T. Ivanov <ivan.ivanov-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>>> > Cc: Mathieu Poirier <mathieu.poirier-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
>>> > Cc: devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
>>> > Cc: Rob Herring <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
>>> > Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>
>>> > Signed-off-by: Suzuki K Poulose <suzuki.poulose-5wv7dgnIgG8@public.gmane.org>
>>>
>>> Hi Suzuki,
>>>
>>> > ---
>>> >  Documentation/devicetree/bindings/arm/coresight.txt     |  4 +++-
>>> >  drivers/hwtracing/coresight/Kconfig                     | 10 +++++-----
>>> >  drivers/hwtracing/coresight/Makefile                    |  2 +-
>>> >  drivers/hwtracing/coresight/coresight-replicator-qcom.c |  2 +-
>>> >  4 files changed, 10 insertions(+), 8 deletions(-)
>>> >
>>> > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
>>> > index fcbae6a..f77329f 100644
>>> > --- a/Documentation/devicetree/bindings/arm/coresight.txt
>>> > +++ b/Documentation/devicetree/bindings/arm/coresight.txt
>>> > @@ -34,7 +34,9 @@ its hardware characteristcs.
>>> >             - Embedded Trace Macrocell (version 4.x):
>>> >                     "arm,coresight-etm4x", "arm,primecell";
>>> >
>>> > -           - Qualcomm Configurable Replicator (version 1.x):
>>> > +           - Coresight programmable Replicator (version 1.x):
>>> > +                   "arm,coresight-dynamic-replicator", "arm,primecell";
>>> > +                           OR
>>> >                     "qcom,coresight-replicator1x", "arm,primecell";
>>>
>>> Rob, what's your view on keeping the old binding around?  We could simply change
>>> the two occurences we find in the DTs (Juno and 410c) to the new name and be
>>> done with the old one.
>>
>> Juno uses the Qcom string? We should keep the old string. You can switch
>> the dts files, but the driver should support the old name.
>
> When we first started working on CoreSight programmable replicators
> were available but the documentation wasn't public.  As such when I
> saw Qualcomm's design I mistakenly thought it was a custom IP block
> and came up with a compatible string that reflected that reality.
> Fast forward 3 years the documentation is available and Juno has used
> the same IP block in their design.  Suzuki's patch rectifies history
> by changing the programmable replicator naming convention to what it
> should have been from the start.
>
> That being said, we can keep the old compatible string around but it
> won't change anything.  CoreSight devices are discovered on the AMBA
> bus and don't use the compatible string - drivers are probed based on
> AMBA IDs laid out in the drivers and device IDs found in HW ID
> registers.
>
> In light of the above let me know what you want to do.

Well, if drivers don't use the string, then there is nothing to keep around.

Rob
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