[PATCH v9 2/2] coresight: add coresight Trace Network On Chip driver

[Leo Yan]

On Wed, Jun 11, 2025 at 04:59:47PM +0800, Yuanfang Zhang wrote:
> Add a driver to support Coresight device Trace Network On Chip (TNOC),
> which is an integration hierarchy integrating functionalities of TPDA
> and funnels. It aggregates the trace and transports to coresight trace
> bus.
> 
> Compared to current configuration, it has the following advantages:
> 1. Reduce wires between subsystems.
> 2. Continue cleaning the infrastructure.
> 3. Reduce Data overhead by transporting raw data from source to target.
> 
>   +------------------------+                +-------------------------+
>   | Video Subsystem        |                |Video Subsystem          |
>   |       +-------------+  |                |       +------------+    |
>   |       | Video TPDM  |  |                |       | Video TPDM |    |
>   |       +-------------+  |                |       +------------+    |
>   |            |           |                |              |          |
>   |            v           |                |              v          |
>   |   +---------------+    |                |        +-----------+    |
>   |   | Video funnel  |    |                |        |Video TNOC |    |
>   |   +---------------+    |                |        +-----------+    |
>   +------------|-----------+                +------------|------------+
>                |                                         |
>                v-----+                                   |
> +--------------------|---------+                         |
> |  Multimedia        v         |                         |
> |  Subsystem   +--------+      |                         |
> |              |  TPDA  |      |                         v
> |              +----|---+      |              +---------------------+
> |                   |          |              |   Aggregator  TNOC  |
> |                   |          |              +----------|----------+
> |                   +--        |                         |
> |                     |        |                         |
> |                     |        |                         |
> |              +------v-----+  |                         |
> |              |  Funnel    |  |                         |
> |              +------------+  |                         |
> +----------------|-------------+                         |
>                  |                                       |
>                  v                                       v
>       +--------------------+                    +------------------+
>       |   Coresight Sink   |                    |  Coresight Sink  |
>       +--------------------+                    +------------------+
> 
>        Current Configuration                            TNOC
> 
> Signed-off-by: Yuanfang Zhang <quic_yuanfang at quicinc.com>

I observed a merging conflict. I would suggest you sticking to the
coresight next branch for CoreSight related upstreaming. Please
rebase this patch on it.

https://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git
branch: next

I also verified this patch with static checker smatch. With rebasing:

Reviewed-by: Leo Yan <leo.yan at arm.com>