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Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/hwmon/vexpress.txt | 23 | ||||
| -rw-r--r-- | Documentation/hwmon/vexpress | 34 |
2 files changed, 57 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/hwmon/vexpress.txt b/Documentation/devicetree/bindings/hwmon/vexpress.txt new file mode 100644 index 00000000000..9c27ed694bb --- /dev/null +++ b/Documentation/devicetree/bindings/hwmon/vexpress.txt @@ -0,0 +1,23 @@ +Versatile Express hwmon sensors +------------------------------- + +Requires node properties: +- "compatible" value : one of + "arm,vexpress-volt" + "arm,vexpress-amp" + "arm,vexpress-temp" + "arm,vexpress-power" + "arm,vexpress-energy" +- "arm,vexpress-sysreg,func" when controlled via vexpress-sysreg + (see Documentation/devicetree/bindings/arm/vexpress-sysreg.txt + for more details) + +Optional node properties: +- label : string describing the monitored value + +Example: + energy@0 { + compatible = "arm,vexpress-energy"; + arm,vexpress-sysreg,func = <13 0>; + label = "A15 Jcore"; + }; diff --git a/Documentation/hwmon/vexpress b/Documentation/hwmon/vexpress new file mode 100644 index 00000000000..557d6d5ad90 --- /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. |