1Kernel driver vexpress
2======================
3
4Supported systems:
5  * ARM Ltd. Versatile Express platform
6    Prefix: 'vexpress'
7    Datasheets:
8      * "Hardware Description" sections of the Technical Reference Manuals
9        for the Versatile Express boards:
10        http://infocenter.arm.com/help/topic/com.arm.doc.subset.boards.express/index.html
11      * Section "4.4.14. System Configuration registers" of the V2M-P1 TRM:
12        http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0447-/index.html
13
14Author: Pawel Moll
15
16Description
17-----------
18
19Versatile Express platform (http://www.arm.com/versatileexpress/) is a
20reference & prototyping system for ARM Ltd. processors. It can be set up
21from a wide range of boards, each of them containing (apart of the main
22chip/FPGA) a number of microcontrollers responsible for platform
23configuration and control. Theses microcontrollers can also monitor the
24board and its environment by a number of internal and external sensors,
25providing information about power lines voltages and currents, board
26temperature and power usage. Some of them also calculate consumed energy
27and provide a cumulative use counter.
28
29The configuration devices are _not_ memory mapped and must be accessed
30via a custom interface, abstracted by the "vexpress_config" API.
31
32As these devices are non-discoverable, they must be described in a Device
33Tree passed to the kernel. Details of the DT binding for them can be found
34in Documentation/devicetree/bindings/hwmon/vexpress.txt.
35