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update for kernel 2.6, VRM version 10.0

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git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@2601 7894878c-1315-0410-8ee3-d5d059ff63e0
This commit is contained in:
Mark D. Studebaker
2004-06-19 18:44:28 +00:00
parent 09611e791d
commit ca49b28372
1 changed files with 30 additions and 14 deletions
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44
doc/vid
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@@ -12,10 +12,11 @@ output to a certain voltage. These pins are also connected to
the sensor chip so that the VID setting can be read back
by applications.
There are generally 5 VID pins. The VID codes are defined
by Intel in documents titled
There are generally 5 VID pins. Recent motherboards may use 6 pins.
The VID codes are defined by Intel in documents titled
"VRM X.X DC-DC Converter Design Guidelines".
(VRM = Voltage Regulator Module)
(VRM = Voltage Regulator Module), or
"Voltage Regulator-Down (VRD) 10.0 Design Guide".
These documents are available at http://developer.intel.com.
There are several different VRM document versions.
@@ -35,6 +36,8 @@ Document Version Voltage Range Increment Processors
9.0, (9.1) 1.100 - 1.850V 0.025V P4, AMD Socket A
10.0 0.8375 - 1.6000 0.0125V Desktop Socket 478
"2.4" is not an actual document version but simply a way to identify
AMD Opteron 24x processors.
@@ -44,17 +47,22 @@ lm_sensors versions through 2.6.3 support only the VRM 8.2 standard.
Starting in lm_sensors 2.6.4 the VRM version is configurable.
To configure the sensor chip for the correct voltage range,
you must set the "vrm" correctly either via /proc or sensors.conf.
you must set the "vrm" correctly either via /proc, /sys, or sensors.conf.
To be compatible with previous lm_sensors versions, the vrm defaults
to version 8.2.
to version 8.2. Generally, for recent motherboards, this will not
be correct. Try 9.0 first.
To change the vrm version to 9.0, for example, do the following
after the chip module (in this example, w83781d) is loaded:
echo 9.0 > /proc/sys/dev/sensors/w83781d-isa-0290/vrm
(kernel 2.4)
echo 9.0 > /proc/sys/dev/sensors/w83781d-isa-0290/vrm
(kernel 2.6)
echo 90 > /sys/bus/i2c/devices/0-0290/vrm
Alternatively, add a line in /etc/sensors.conf in the w83781d section:
Alternatively, add a line in /etc/sensors.conf in the w83781d section
(you should put this line BEFORE any line that uses vid in a calculation):
set vrm 9.0
@@ -64,7 +72,10 @@ and then, after the chip module is loaded, do:
After this, reading the vid either by
cat /proc/sys/dev/sensors/w83781d-isa-0290/vid
(kernel 2.4)
cat /proc/sys/dev/sensors/w83781d-isa-0290/vid
(kernel 2.6 - divide the output by 1000)
cat /sys/bus/i2c/devices/0-0290/in0_ref
or by
@@ -73,24 +84,26 @@ or by
should show the new vid value.
The following values are legal vrm values:
The following values are legal vrm values. Other values will be
allowed but will result in using the 8.2 standard.
8.2, 8.4, 8.5, 9.0
2.4, 8.1-8.5, 9.0, 9.1, 10.0
Remember, the VID pins on the sensor chips are inputs only.
That means they can't be changed and there shouldn't be
any problems if you experiment with the vrm values until you
get it right.
get it right. You cannot manipulate the actual processor core
voltage through lm_sensors drivers.
Not all sensor chips have VID inputs.
For those that do, the VRM support status is listed below.
The following chip drivers support all the VRM versions via
/etc/sensors.conf and the vrm entry in /proc:
/etc/sensors.conf and the vrm entry in /proc or /sys:
adm1025, w83781d, lm87
adm1025, adm1026, asb100, lm85, lm87,
vt1211, vt8231, w83627hf, w83781d
The following chip drivers support only VRM 8.2 and cannot be changed:
@@ -100,3 +113,6 @@ The following chip drivers support only VRM 8.2 and cannot be changed:
If you have a board with one of these chips which needs advanced
VRM support please email us.
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Copyright (c) 2002-2004 Mark D. Studebaker