[PATCH 1/3] arm64: dts: juno: add coresight support

On 17/06/16 16:29, Mathieu Poirier wrote:

On 6 June 2016 at 09:59, Sudeep Holla [off-list ref] wrote:

quoted

Most of the debug-related components on Juno are located in the coreSight
subsystem while others are located in the Cortex-Axx clusters, the SCP
subsystem, and in the main system.

Each core in the two processor clusters contain an Embedded Trace
Macrocell(ETM) which generates real-time trace information that trace
tools can use and an ATB trace output that is sent to a funnel before
going to the CoreSight subsystem.

The trace output signals combine with two trace expansions using another
funnel and fed into the Embedded Trace FIFO(ETF0).

The output trace data stream of the funnel is then replicated before it
is sent to either the:
- Trace Port Interface Unit(TPIU), that sends it out using the trace port.
- ETR that can write the trace data to memory located in the application
   memory space

Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Lorenzo Pieralisi <redacted>
Cc: linux-arm-kernel at lists.infradead.org
Cc: devicetree at vger.kernel.org
Signed-off-by: Sudeep Holla <redacted>
---
  arch/arm64/boot/dts/arm/juno-base.dtsi | 296 +++++++++++++++++++++++++++++++++
  arch/arm64/boot/dts/arm/juno-r1.dts    |  24 +++
  arch/arm64/boot/dts/arm/juno-r2.dts    |  24 +++
  arch/arm64/boot/dts/arm/juno.dts       |  24 +++
  4 files changed, 368 insertions(+)

diff --git a/arch/arm64/boot/dts/arm/juno-base.dtsi b/arch/arm64/boot/dts/arm/juno-base.dtsi
index dee2386d3b9b..90a8710f7032 100644
--- a/arch/arm64/boot/dts/arm/juno-base.dtsi
+++ b/arch/arm64/boot/dts/arm/juno-base.dtsi

[...]

quoted

+
+       coresight-replicator {
+               /* non-configurable replicators don't show up on the
+                * AMBA bus.  As such no need to add "arm,primecell".
+                */

Please use kernel documentation style.

Ah, that's copy paste from arch/arm/boot/dts/vexpress-v2p-ca15_a7.dts ;)


[...]

quoted

With the above change:

Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Thanks.

-- 
Regards,
Sudeep