mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 14:43:58 +08:00
48ed887724
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>
35 lines
1.5 KiB
Plaintext
35 lines
1.5 KiB
Plaintext
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.
|