From 48ed8877244637b52aec0a114cdccd8ec26e66b1 Mon Sep 17 00:00:00 2001 From: Pawel Moll Date: Mon, 17 Sep 2012 18:40:09 +0100 Subject: 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 Acked-by: Guenter Roeck --- Documentation/hwmon/vexpress | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 Documentation/hwmon/vexpress (limited to 'Documentation/hwmon') diff --git a/Documentation/hwmon/vexpress b/Documentation/hwmon/vexpress new file mode 100644 index 0000000..557d6d5 --- /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. -- cgit v1.1