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| author | Pawel Moll <pawel.moll@arm.com> | 2012-09-17 18:40:09 +0100 |
|---|---|---|
| committer | Pawel Moll <pawel.moll@arm.com> | 2012-10-16 17:12:35 +0100 |
| commit | 48ed8877244637b52aec0a114cdccd8ec26e66b1 (patch) | |
| tree | 56e04096ead15bd84d1b768f2630a36c9c832a70 /Documentation/hwmon | |
| parent | ddffeb8c4d0331609ef2581d84de4d763607bd37 (diff) | |
| download | linux-48ed8877244637b52aec0a114cdccd8ec26e66b1.tar.bz2 | |
hwmon: Versatile Express hwmon driver
hwmon framework driver for Versatile Express sensors, providing
information about board level voltage (only when regulator driver
is not configured), currents, temperature and power/energy usage.
Labels for the values can be defined as DT properties.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/vexpress | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Documentation/hwmon/vexpress b/Documentation/hwmon/vexpress new file mode 100644 index 000000000000..557d6d5ad90d --- /dev/null +++ b/Documentation/hwmon/vexpress @@ -0,0 +1,34 @@ +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. |