Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/Documentation/hwmon/vexpress.rst b/Documentation/hwmon/vexpress.rst
new file mode 100644
index 0000000000..7fc99f75b3
--- /dev/null
+++ b/Documentation/hwmon/vexpress.rst
@@ -0,0 +1,41 @@
+Kernel driver vexpress
+======================
+
+Supported systems:
+
+  * ARM Ltd. Versatile Express platform
+
+    Prefix: 'vexpress'
+
+    Datasheets:
+
+      * "Hardware Description" sections of the Technical Reference Manuals
+	for the Versatile Express boards:
+
+	- http://infocenter.arm.com/help/topic/com.arm.doc.subset.boards.express/index.html
+
+      * Section "4.4.14. System Configuration registers" of the V2M-P1 TRM:
+
+	- http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0447-/index.html
+
+Author: Pawel Moll
+
+Description
+-----------
+
+Versatile Express platform (http://www.arm.com/versatileexpress/) is a
+reference & prototyping system for ARM Ltd. processors. It can be set up
+from a wide range of boards, each of them containing (apart of the main
+chip/FPGA) a number of microcontrollers responsible for platform
+configuration and control. These microcontrollers can also monitor the
+board and its environment by a number of internal and external sensors,
+providing information about power lines voltages and currents, board
+temperature and power usage. Some of them also calculate consumed energy
+and provide a cumulative use counter.
+
+The configuration devices are _not_ memory mapped and must be accessed
+via a custom interface, abstracted by the "vexpress_config" API.
+
+As these devices are non-discoverable, they must be described in a Device
+Tree passed to the kernel. Details of the DT binding for them can be found
+in Documentation/devicetree/bindings/hwmon/vexpress.txt.