* [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units
[not found] <20200722172040.1299289-1-suzuki.poulose@arm.com>
@ 2020-07-22 17:20 ` Suzuki K Poulose
2020-07-23 17:27 ` Rob Herring
2020-07-29 17:20 ` Mathieu Poirier
0 siblings, 2 replies; 5+ messages in thread
From: Suzuki K Poulose @ 2020-07-22 17:20 UTC (permalink / raw)
To: linux-arm-kernel
Cc: linux-kernel, mike.leach, mathieu.poirier, coresight,
Suzuki K Poulose, Rob Herring, devicetree
Document the bindings for ETMv4.4 and later with only system register
access.
Cc: Rob Herring <robh+dt@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
---
Documentation/devicetree/bindings/arm/coresight.txt | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
index d711676b4a51..cfe47bdda728 100644
--- a/Documentation/devicetree/bindings/arm/coresight.txt
+++ b/Documentation/devicetree/bindings/arm/coresight.txt
@@ -34,9 +34,13 @@ its hardware characteristcs.
Program Flow Trace Macrocell:
"arm,coresight-etm3x", "arm,primecell";
- - Embedded Trace Macrocell (version 4.x):
+ - Embedded Trace Macrocell (version 4.x), with memory mapped access.
"arm,coresight-etm4x", "arm,primecell";
+ - Embedded Trace Macrocell (version 4.4 and later) with system
+ register access only.
+ "arm,coresight-etm-v4.4";
+
- Coresight programmable Replicator :
"arm,coresight-dynamic-replicator", "arm,primecell";
--
2.24.1
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units
2020-07-22 17:20 ` [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units Suzuki K Poulose
@ 2020-07-23 17:27 ` Rob Herring
2020-07-29 17:20 ` Mathieu Poirier
1 sibling, 0 replies; 5+ messages in thread
From: Rob Herring @ 2020-07-23 17:27 UTC (permalink / raw)
To: Suzuki K Poulose
Cc: linux-arm-kernel, linux-kernel, coresight, Rob Herring,
mathieu.poirier, mike.leach, devicetree
On Wed, 22 Jul 2020 18:20:40 +0100, Suzuki K Poulose wrote:
> Document the bindings for ETMv4.4 and later with only system register
> access.
>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Mike Leach <mike.leach@linaro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
> Documentation/devicetree/bindings/arm/coresight.txt | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
Reviewed-by: Rob Herring <robh@kernel.org>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units
2020-07-22 17:20 ` [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units Suzuki K Poulose
2020-07-23 17:27 ` Rob Herring
@ 2020-07-29 17:20 ` Mathieu Poirier
2020-07-30 16:38 ` Suzuki K Poulose
1 sibling, 1 reply; 5+ messages in thread
From: Mathieu Poirier @ 2020-07-29 17:20 UTC (permalink / raw)
To: Suzuki K Poulose
Cc: linux-arm-kernel, linux-kernel, mike.leach, coresight,
Rob Herring, devicetree
On Wed, Jul 22, 2020 at 06:20:40PM +0100, Suzuki K Poulose wrote:
> Document the bindings for ETMv4.4 and later with only system register
> access.
>
> Cc: Rob Herring <robh+dt@kernel.org>
> Cc: devicetree@vger.kernel.org
> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> Cc: Mike Leach <mike.leach@linaro.org>
> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> ---
> Documentation/devicetree/bindings/arm/coresight.txt | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> index d711676b4a51..cfe47bdda728 100644
> --- a/Documentation/devicetree/bindings/arm/coresight.txt
> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> @@ -34,9 +34,13 @@ its hardware characteristcs.
> Program Flow Trace Macrocell:
> "arm,coresight-etm3x", "arm,primecell";
>
> - - Embedded Trace Macrocell (version 4.x):
> + - Embedded Trace Macrocell (version 4.x), with memory mapped access.
> "arm,coresight-etm4x", "arm,primecell";
>
> + - Embedded Trace Macrocell (version 4.4 and later) with system
> + register access only.
> + "arm,coresight-etm-v4.4";
I would rather call this "arm,coresight-etm-v4.4+" so that the binding's
semantic is still relevant when dealing with ETM v4.5 and onward.
Thanks,
Mathieu
> +
> - Coresight programmable Replicator :
> "arm,coresight-dynamic-replicator", "arm,primecell";
>
> --
> 2.24.1
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units
2020-07-29 17:20 ` Mathieu Poirier
@ 2020-07-30 16:38 ` Suzuki K Poulose
2020-08-10 20:14 ` Mathieu Poirier
0 siblings, 1 reply; 5+ messages in thread
From: Suzuki K Poulose @ 2020-07-30 16:38 UTC (permalink / raw)
To: mathieu.poirier
Cc: linux-arm-kernel, linux-kernel, mike.leach, coresight, robh+dt,
devicetree
On 07/29/2020 06:20 PM, Mathieu Poirier wrote:
> On Wed, Jul 22, 2020 at 06:20:40PM +0100, Suzuki K Poulose wrote:
>> Document the bindings for ETMv4.4 and later with only system register
>> access.
>>
>> Cc: Rob Herring <robh+dt@kernel.org>
>> Cc: devicetree@vger.kernel.org
>> Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
>> Cc: Mike Leach <mike.leach@linaro.org>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>> ---
>> Documentation/devicetree/bindings/arm/coresight.txt | 6 +++++-
>> 1 file changed, 5 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
>> index d711676b4a51..cfe47bdda728 100644
>> --- a/Documentation/devicetree/bindings/arm/coresight.txt
>> +++ b/Documentation/devicetree/bindings/arm/coresight.txt
>> @@ -34,9 +34,13 @@ its hardware characteristcs.
>> Program Flow Trace Macrocell:
>> "arm,coresight-etm3x", "arm,primecell";
>>
>> - - Embedded Trace Macrocell (version 4.x):
>> + - Embedded Trace Macrocell (version 4.x), with memory mapped access.
>> "arm,coresight-etm4x", "arm,primecell";
>>
>> + - Embedded Trace Macrocell (version 4.4 and later) with system
>> + register access only.
>> + "arm,coresight-etm-v4.4";
>
> I would rather call this "arm,coresight-etm-v4.4+" so that the binding's
> semantic is still relevant when dealing with ETM v4.5 and onward.
AFAIUC, "compatible" stands for something that is compatible with v4.4.
All v4.4+ versions that are compatible with v4.4 are covered here.
Having said that I am fine with "arm,coresight-etm-v4.4+" , if it
is fine by the DT conventions.
Cheers
Suzuki
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units
2020-07-30 16:38 ` Suzuki K Poulose
@ 2020-08-10 20:14 ` Mathieu Poirier
0 siblings, 0 replies; 5+ messages in thread
From: Mathieu Poirier @ 2020-08-10 20:14 UTC (permalink / raw)
To: Suzuki K Poulose
Cc: linux-arm-kernel, linux-kernel, mike.leach, coresight, robh+dt,
devicetree
On Thu, Jul 30, 2020 at 05:38:37PM +0100, Suzuki K Poulose wrote:
> On 07/29/2020 06:20 PM, Mathieu Poirier wrote:
> > On Wed, Jul 22, 2020 at 06:20:40PM +0100, Suzuki K Poulose wrote:
> > > Document the bindings for ETMv4.4 and later with only system register
> > > access.
> > >
> > > Cc: Rob Herring <robh+dt@kernel.org>
> > > Cc: devicetree@vger.kernel.org
> > > Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
> > > Cc: Mike Leach <mike.leach@linaro.org>
> > > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
> > > ---
> > > Documentation/devicetree/bindings/arm/coresight.txt | 6 +++++-
> > > 1 file changed, 5 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/Documentation/devicetree/bindings/arm/coresight.txt b/Documentation/devicetree/bindings/arm/coresight.txt
> > > index d711676b4a51..cfe47bdda728 100644
> > > --- a/Documentation/devicetree/bindings/arm/coresight.txt
> > > +++ b/Documentation/devicetree/bindings/arm/coresight.txt
> > > @@ -34,9 +34,13 @@ its hardware characteristcs.
> > > Program Flow Trace Macrocell:
> > > "arm,coresight-etm3x", "arm,primecell";
> > > - - Embedded Trace Macrocell (version 4.x):
> > > + - Embedded Trace Macrocell (version 4.x), with memory mapped access.
> > > "arm,coresight-etm4x", "arm,primecell";
> > > + - Embedded Trace Macrocell (version 4.4 and later) with system
> > > + register access only.
> > > + "arm,coresight-etm-v4.4";
> >
> > I would rather call this "arm,coresight-etm-v4.4+" so that the binding's
> > semantic is still relevant when dealing with ETM v4.5 and onward.
>
> AFAIUC, "compatible" stands for something that is compatible with v4.4.
> All v4.4+ versions that are compatible with v4.4 are covered here.
Your position is valid - let's to with what you had.
> Having said that I am fine with "arm,coresight-etm-v4.4+" , if it
> is fine by the DT conventions.
>
> Cheers
> Suzuki
^ permalink raw reply [flat|nested] 5+ messages in thread
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2020-07-22 17:20 ` [RFC PATCH 14/14] dts: bindings: coresight: ETMv4.4 system register access only units Suzuki K Poulose
2020-07-23 17:27 ` Rob Herring
2020-07-29 17:20 ` Mathieu Poirier
2020-07-30 16:38 ` Suzuki K Poulose
2020-08-10 20:14 ` Mathieu Poirier
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