vexpress.rst 1.5 KB

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