diff options
author | Arnd Bergmann <arnd@arndb.de> | 2012-10-26 09:29:40 -0400 |
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committer | Arnd Bergmann <arnd@arndb.de> | 2012-10-26 09:29:40 -0400 |
commit | 9628d859750e1b0b1181ed96c64d341f1d5b6cee (patch) | |
tree | 0a6a48608ed45ab68f1a56f80f392db4746a7e18 /Documentation/hwmon | |
parent | 6f0c0580b70c89094b3422ba81118c7b959c7556 (diff) | |
parent | 790440bc90fa800ff2a4b8b5046227a2ca32c1b1 (diff) |
Merge branch 'vexpress-drivers' of git://git.linaro.org/people/pawelmoll/linux into next/drivers
Versatile Express changes from Pawel Moll <pawel.moll@arm.com>:
* 'vexpress-drivers' of git://git.linaro.org/people/pawelmoll/linux:
ARM: vexpress: Reset driver
hwmon: Versatile Express hwmon driver
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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 @@ | |||
1 | Kernel driver vexpress | ||
2 | ====================== | ||
3 | |||
4 | Supported systems: | ||
5 | * ARM Ltd. Versatile Express platform | ||
6 | Prefix: 'vexpress' | ||
7 | Datasheets: | ||
8 | * "Hardware Description" sections of the Technical Reference Manuals | ||
9 | for the Versatile Express boards: | ||
10 | http://infocenter.arm.com/help/topic/com.arm.doc.subset.boards.express/index.html | ||
11 | * Section "4.4.14. System Configuration registers" of the V2M-P1 TRM: | ||
12 | http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0447-/index.html | ||
13 | |||
14 | Author: Pawel Moll | ||
15 | |||
16 | Description | ||
17 | ----------- | ||
18 | |||
19 | Versatile Express platform (http://www.arm.com/versatileexpress/) is a | ||
20 | reference & prototyping system for ARM Ltd. processors. It can be set up | ||
21 | from a wide range of boards, each of them containing (apart of the main | ||
22 | chip/FPGA) a number of microcontrollers responsible for platform | ||
23 | configuration and control. Theses microcontrollers can also monitor the | ||
24 | board and its environment by a number of internal and external sensors, | ||
25 | providing information about power lines voltages and currents, board | ||
26 | temperature and power usage. Some of them also calculate consumed energy | ||
27 | and provide a cumulative use counter. | ||
28 | |||
29 | The configuration devices are _not_ memory mapped and must be accessed | ||
30 | via a custom interface, abstracted by the "vexpress_config" API. | ||
31 | |||
32 | As these devices are non-discoverable, they must be described in a Device | ||
33 | Tree passed to the kernel. Details of the DT binding for them can be found | ||
34 | in Documentation/devicetree/bindings/hwmon/vexpress.txt. | ||