coresight-tmc: add CoreSight TMC driver

This driver manages CoreSight TMC (Trace Memory Controller) which
can act as a link or a sink depending upon its configuration. It
can present itself as an ETF (Embedded Trace FIFO) or ETR
(Embedded Trace Router).

ETF when configured in circular buffer mode acts as a trace
collection sink. When configured in HW fifo mode it acts as link.
ETR always acts as a sink and can be used to route data to memory
allocated in RAM.

Signed-off-by: Pratik Patel <pratikp@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 20 insertions, 0 deletions

diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index cd3890e3110e..092b6728af55 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -1340,4 +1340,24 @@ menuconfig CORESIGHT
           a topological view of the CoreSight components based on a DT
           specification and configure the right serie of components when a
           trace source gets enabled.
+
+if CORESIGHT
+config CORESIGHT_LINKS_AND_SINKS
+        bool "CoreSight Link and Sink drivers"
+        help
+          This enables support for CoreSight link and sink drivers 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.
+
+config CORESIGHT_LINK_AND_SINK_TMC
+        bool "Coresight generic TMC driver"
+        depends on CORESIGHT_LINKS_AND_SINKS
+        help
+          This enables support for the Trace Memory Controller driver.  Depending
+          on its configuration the device can act as a link (embedded trace router
+          - ETR) or sink (embedded trace FIFO).  The driver complies with the
+          generic implementation of the component without special enhancement or
+          added features.
+endif
 endmenu