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r: 36754
b: refs/heads/master
c: 6e3ce3a
h: refs/heads/master
v: v3
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Greg Kroah-Hartman committed Sep 29, 2006
1 parent 2c0c27a commit 1412375
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2 changes: 1 addition & 1 deletion [refs]
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---
refs/heads/master: 2ff712585a5026a021859233fce145068292584d
refs/heads/master: 6e3ce3ae8e872f2d3a30f5ce5bc3b7c5eeca4343
61 changes: 14 additions & 47 deletions trunk/Documentation/hwmon/it87
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Expand Up @@ -13,25 +13,12 @@ Supported chips:
from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/
* IT8716F
Prefix: 'it8716'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/product_info/file/pc/IT8716F_V0.3.ZIP
* IT8718F
Prefix: 'it8718'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Publicly available at the ITE website
http://www.ite.com.tw/product_info/file/pc/IT8718F_V0.2.zip
http://www.ite.com.tw/product_info/file/pc/IT8718F_V0%203_(for%20C%20version).zip
* SiS950 [clone of IT8705F]
Prefix: 'it87'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: No longer be available

Authors:
Christophe Gauthron <chrisg@0-in.com>
Jean Delvare <khali@linux-fr.org>
Author: Christophe Gauthron <chrisg@0-in.com>


Module Parameters
Expand All @@ -56,46 +43,26 @@ Module Parameters
Description
-----------

This driver implements support for the IT8705F, IT8712F, IT8716F,
IT8718F and SiS950 chips.
This driver implements support for the IT8705F, IT8712F and SiS950 chips.

This driver also supports IT8712F, which adds SMBus access, and a VID
input, used to report the Vcore voltage of the Pentium processor.
The IT8712F additionally features VID inputs.

These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
include an 'environment controller' with 3 temperature sensors, 3 fan
rotation speed sensors, 8 voltage sensors, and associated alarms.

The IT8712F and IT8716F additionally feature VID inputs, used to report
the Vcore voltage of the processor. The early IT8712F have 5 VID pins,
the IT8716F and late IT8712F have 6. They are shared with other functions
though, so the functionality may not be available on a given system.
The driver dumbly assume it is there.

The IT8718F also features VID inputs (up to 8 pins) but the value is
stored in the Super-I/O configuration space. Due to technical limitations,
this value can currently only be read once at initialization time, so
the driver won't notice and report changes in the VID value. The two
upper VID bits share their pins with voltage inputs (in5 and in6) so you
can't have both on a given board.

The IT8716F, IT8718F and later IT8712F revisions have support for
2 additional fans. They are not yet supported by the driver.

The IT8716F and IT8718F, and late IT8712F and IT8705F also have optional
16-bit tachometer counters for fans 1 to 3. This is better (no more fan
clock divider mess) but not compatible with the older chips and
revisions. For now, the driver only uses the 16-bit mode on the
IT8716F and IT8718F.

Temperatures are measured in degrees Celsius. An alarm is triggered once
when the Overtemperature Shutdown limit is crossed.

Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
triggered if the rotation speed has dropped below a programmable limit. When
16-bit tachometer counters aren't used, fan readings can be divided by
a programmable divider (1, 2, 4 or 8) to give the readings more range or
accuracy. With a divider of 2, the lowest representable value is around
2600 RPM. Not all RPM values can accurately be represented, so some rounding
is done.
triggered if the rotation speed has dropped below a programmable limit. Fan
readings can be divided by a programmable divider (1, 2, 4 or 8) to give the
readings more range or accuracy. Not all RPM values can accurately be
represented, so some rounding is done. With a divider of 2, the lowest
representable value is around 2600 RPM.

Voltage sensors (also known as IN sensors) report their values in volts. An
alarm is triggered if the voltage has crossed a programmable minimum or
Expand All @@ -104,9 +71,9 @@ zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 4.08 volts, with a resolution of
0.016 volt. The battery voltage in8 does not have limit registers.

The VID lines (IT8712F/IT8716F/IT8718F) encode the core voltage value:
the voltage level your processor should work with. This is hardcoded by
the mainboard and/or processor itself. It is a value in volts.
The VID lines (IT8712F only) encode the core voltage value: the voltage
level your processor should work with. This is hardcoded by the mainboard
and/or processor itself. It is a value in volts.

If an alarm triggers, it will remain triggered until the hardware register
is read at least once. This means that the cause for the alarm may already
Expand Down
52 changes: 0 additions & 52 deletions trunk/Documentation/hwmon/k8temp

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206 changes: 0 additions & 206 deletions trunk/Documentation/hwmon/vt1211

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