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Arnd Bergmann
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refs/heads/master: d792aebfa2daeb58ac6a669ce328ad05e9e4112c | ||
refs/heads/master: 2cf4726c253cc153faab239697b0c562c6975613 |
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trunk/Documentation/devicetree/bindings/hwmon/vexpress.txt
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Versatile Express hwmon sensors | ||
------------------------------- | ||
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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) | ||
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Optional node properties: | ||
- label : string describing the monitored value | ||
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Example: | ||
energy@0 { | ||
compatible = "arm,vexpress-energy"; | ||
arm,vexpress-sysreg,func = <13 0>; | ||
label = "A15 Jcore"; | ||
}; |
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Kernel driver vexpress | ||
====================== | ||
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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 | ||
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Author: Pawel Moll | ||
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Description | ||
----------- | ||
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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. | ||
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The configuration devices are _not_ memory mapped and must be accessed | ||
via a custom interface, abstracted by the "vexpress_config" API. | ||
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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. |
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