| 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. Theses 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. |