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Kernel driver adm1021 | ||
===================== | ||
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||
Supported chips: | ||
* Analog Devices ADM1021 | ||
Prefix: 'adm1021' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Analog Devices website | ||
* Analog Devices ADM1021A/ADM1023 | ||
Prefix: 'adm1023' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Analog Devices website | ||
* Genesys Logic GL523SM | ||
Prefix: 'gl523sm' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: | ||
* Intel Xeon Processor | ||
Prefix: - any other - may require 'force_adm1021' parameter | ||
Addresses scanned: none | ||
Datasheet: Publicly available at Intel website | ||
* Maxim MAX1617 | ||
Prefix: 'max1617' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Maxim website | ||
* Maxim MAX1617A | ||
Prefix: 'max1617a' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Maxim website | ||
* National Semiconductor LM84 | ||
Prefix: 'lm84' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the National Semiconductor website | ||
* Philips NE1617 | ||
Prefix: 'max1617' (probably detected as a max1617) | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Philips website | ||
* Philips NE1617A | ||
Prefix: 'max1617' (probably detected as a max1617) | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Philips website | ||
* TI THMC10 | ||
Prefix: 'thmc10' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the TI website | ||
* Onsemi MC1066 | ||
Prefix: 'mc1066' | ||
Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e | ||
Datasheet: Publicly available at the Onsemi website | ||
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||
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Authors: | ||
Frodo Looijaard <frodol@dds.nl>, | ||
Philip Edelbrock <phil@netroedge.com> | ||
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Module Parameters | ||
----------------- | ||
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* read_only: int | ||
Don't set any values, read only mode | ||
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Description | ||
----------- | ||
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The chips supported by this driver are very similar. The Maxim MAX1617 is | ||
the oldest; it has the problem that it is not very well detectable. The | ||
MAX1617A solves that. The ADM1021 is a straight clone of the MAX1617A. | ||
Ditto for the THMC10. From here on, we will refer to all these chips as | ||
ADM1021-clones. | ||
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||
The ADM1021 and MAX1617A reports a die code, which is a sort of revision | ||
code. This can help us pinpoint problems; it is not very useful | ||
otherwise. | ||
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ADM1021-clones implement two temperature sensors. One of them is internal, | ||
and measures the temperature of the chip itself; the other is external and | ||
is realised in the form of a transistor-like device. A special alarm | ||
indicates whether the remote sensor is connected. | ||
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||
Each sensor has its own low and high limits. When they are crossed, the | ||
corresponding alarm is set and remains on as long as the temperature stays | ||
out of range. Temperatures are measured in degrees Celsius. Measurements | ||
are possible between -65 and +127 degrees, with a resolution of one degree. | ||
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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 | ||
have disappeared! | ||
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This driver only updates its values each 1.5 seconds; reading it more often | ||
will do no harm, but will return 'old' values. It is possible to make | ||
ADM1021-clones do faster measurements, but there is really no good reason | ||
for that. | ||
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Xeon support | ||
------------ | ||
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Some Xeon processors have real max1617, adm1021, or compatible chips | ||
within them, with two temperature sensors. | ||
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Other Xeons have chips with only one sensor. | ||
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If you have a Xeon, and the adm1021 module loads, and both temperatures | ||
appear valid, then things are good. | ||
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If the adm1021 module doesn't load, you should try this: | ||
modprobe adm1021 force_adm1021=BUS,ADDRESS | ||
ADDRESS can only be 0x18, 0x1a, 0x29, 0x2b, 0x4c, or 0x4e. | ||
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If you have dual Xeons you may have appear to have two separate | ||
adm1021-compatible chips, or two single-temperature sensors, at distinct | ||
addresses. |
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Kernel driver adm1025 | ||
===================== | ||
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Supported chips: | ||
* Analog Devices ADM1025, ADM1025A | ||
Prefix: 'adm1025' | ||
Addresses scanned: I2C 0x2c - 0x2e | ||
Datasheet: Publicly available at the Analog Devices website | ||
* Philips NE1619 | ||
Prefix: 'ne1619' | ||
Addresses scanned: I2C 0x2c - 0x2d | ||
Datasheet: Publicly available at the Philips website | ||
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The NE1619 presents some differences with the original ADM1025: | ||
* Only two possible addresses (0x2c - 0x2d). | ||
* No temperature offset register, but we don't use it anyway. | ||
* No INT mode for pin 16. We don't play with it anyway. | ||
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Authors: | ||
Chen-Yuan Wu <gwu@esoft.com>, | ||
Jean Delvare <khali@linux-fr.org> | ||
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Description | ||
----------- | ||
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(This is from Analog Devices.) The ADM1025 is a complete system hardware | ||
monitor for microprocessor-based systems, providing measurement and limit | ||
comparison of various system parameters. Five voltage measurement inputs | ||
are provided, for monitoring +2.5V, +3.3V, +5V and +12V power supplies and | ||
the processor core voltage. The ADM1025 can monitor a sixth power-supply | ||
voltage by measuring its own VCC. One input (two pins) is dedicated to a | ||
remote temperature-sensing diode and an on-chip temperature sensor allows | ||
ambient temperature to be monitored. | ||
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One specificity of this chip is that the pin 11 can be hardwired in two | ||
different manners. It can act as the +12V power-supply voltage analog | ||
input, or as the a fifth digital entry for the VID reading (bit 4). It's | ||
kind of strange since both are useful, and the reason for designing the | ||
chip that way is obscure at least to me. The bit 5 of the configuration | ||
register can be used to define how the chip is hardwired. Please note that | ||
it is not a choice you have to make as the user. The choice was already | ||
made by your motherboard's maker. If the configuration bit isn't set | ||
properly, you'll have a wrong +12V reading or a wrong VID reading. The way | ||
the driver handles that is to preserve this bit through the initialization | ||
process, assuming that the BIOS set it up properly beforehand. If it turns | ||
out not to be true in some cases, we'll provide a module parameter to force | ||
modes. | ||
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This driver also supports the ADM1025A, which differs from the ADM1025 | ||
only in that it has "open-drain VID inputs while the ADM1025 has on-chip | ||
100k pull-ups on the VID inputs". It doesn't make any difference for us. |
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Kernel driver adm1026 | ||
===================== | ||
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Supported chips: | ||
* Analog Devices ADM1026 | ||
Prefix: 'adm1026' | ||
Addresses scanned: I2C 0x2c, 0x2d, 0x2e | ||
Datasheet: Publicly available at the Analog Devices website | ||
http://www.analog.com/en/prod/0,,766_825_ADM1026,00.html | ||
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Authors: | ||
Philip Pokorny <ppokorny@penguincomputing.com> for Penguin Computing | ||
Justin Thiessen <jthiessen@penguincomputing.com> | ||
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Module Parameters | ||
----------------- | ||
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* gpio_input: int array (min = 1, max = 17) | ||
List of GPIO pins (0-16) to program as inputs | ||
* gpio_output: int array (min = 1, max = 17) | ||
List of GPIO pins (0-16) to program as outputs | ||
* gpio_inverted: int array (min = 1, max = 17) | ||
List of GPIO pins (0-16) to program as inverted | ||
* gpio_normal: int array (min = 1, max = 17) | ||
List of GPIO pins (0-16) to program as normal/non-inverted | ||
* gpio_fan: int array (min = 1, max = 8) | ||
List of GPIO pins (0-7) to program as fan tachs | ||
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Description | ||
----------- | ||
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This driver implements support for the Analog Devices ADM1026. Analog | ||
Devices calls it a "complete thermal system management controller." | ||
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The ADM1026 implements three (3) temperature sensors, 17 voltage sensors, | ||
16 general purpose digital I/O lines, eight (8) fan speed sensors (8-bit), | ||
an analog output and a PWM output along with limit, alarm and mask bits for | ||
all of the above. There is even 8k bytes of EEPROM memory on chip. | ||
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Temperatures are measured in degrees Celsius. There are two external | ||
sensor inputs and one internal sensor. Each sensor has a high and low | ||
limit. If the limit is exceeded, an interrupt (#SMBALERT) can be | ||
generated. The interrupts can be masked. In addition, there are over-temp | ||
limits for each sensor. If this limit is exceeded, the #THERM output will | ||
be asserted. The current temperature and limits have a resolution of 1 | ||
degree. | ||
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Fan rotation speeds are reported in RPM (rotations per minute) but measured | ||
in counts of a 22.5kHz internal clock. Each fan has a high limit which | ||
corresponds to a minimum fan speed. If the limit is exceeded, an interrupt | ||
can be generated. Each fan can be programmed to divide the reference clock | ||
by 1, 2, 4 or 8. Not all RPM values can accurately be represented, so some | ||
rounding is done. With a divider of 8, the slowest measurable speed of a | ||
two pulse per revolution fan is 661 RPM. | ||
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There are 17 voltage sensors. An alarm is triggered if the voltage has | ||
crossed a programmable minimum or maximum limit. Note that minimum in this | ||
case always means 'closest to zero'; this is important for negative voltage | ||
measurements. Several inputs have integrated attenuators so they can measure | ||
higher voltages directly. 3.3V, 5V, 12V, -12V and battery voltage all have | ||
dedicated inputs. There are several inputs scaled to 0-3V full-scale range | ||
for SCSI terminator power. The remaining inputs are not scaled and have | ||
a 0-2.5V full-scale range. A 2.5V or 1.82V reference voltage is provided | ||
for negative voltage measurements. | ||
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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 | ||
have disappeared! Note that in the current implementation, all hardware | ||
registers are read whenever any data is read (unless it is less than 2.0 | ||
seconds since the last update). This means that you can easily miss | ||
once-only alarms. | ||
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The ADM1026 measures continuously. Analog inputs are measured about 4 | ||
times a second. Fan speed measurement time depends on fan speed and | ||
divisor. It can take as long as 1.5 seconds to measure all fan speeds. | ||
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The ADM1026 has the ability to automatically control fan speed based on the | ||
temperature sensor inputs. Both the PWM output and the DAC output can be | ||
used to control fan speed. Usually only one of these two outputs will be | ||
used. Write the minimum PWM or DAC value to the appropriate control | ||
register. Then set the low temperature limit in the tmin values for each | ||
temperature sensor. The range of control is fixed at 20 �C, and the | ||
largest difference between current and tmin of the temperature sensors sets | ||
the control output. See the datasheet for several example circuits for | ||
controlling fan speed with the PWM and DAC outputs. The fan speed sensors | ||
do not have PWM compensation, so it is probably best to control the fan | ||
voltage from the power lead rather than on the ground lead. | ||
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The datasheet shows an example application with VID signals attached to | ||
GPIO lines. Unfortunately, the chip may not be connected to the VID lines | ||
in this way. The driver assumes that the chips *is* connected this way to | ||
get a VID voltage. |
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Kernel driver adm1031 | ||
===================== | ||
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Supported chips: | ||
* Analog Devices ADM1030 | ||
Prefix: 'adm1030' | ||
Addresses scanned: I2C 0x2c to 0x2e | ||
Datasheet: Publicly available at the Analog Devices website | ||
http://products.analog.com/products/info.asp?product=ADM1030 | ||
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* Analog Devices ADM1031 | ||
Prefix: 'adm1031' | ||
Addresses scanned: I2C 0x2c to 0x2e | ||
Datasheet: Publicly available at the Analog Devices website | ||
http://products.analog.com/products/info.asp?product=ADM1031 | ||
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Authors: | ||
Alexandre d'Alton <alex@alexdalton.org> | ||
Jean Delvare <khali@linux-fr.org> | ||
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Description | ||
----------- | ||
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The ADM1030 and ADM1031 are digital temperature sensors and fan controllers. | ||
They sense their own temperature as well as the temperature of up to one | ||
(ADM1030) or two (ADM1031) external diodes. | ||
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All temperature values are given in degrees Celsius. Resolution is 0.5 | ||
degree for the local temperature, 0.125 degree for the remote temperatures. | ||
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Each temperature channel has its own high and low limits, plus a critical | ||
limit. | ||
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The ADM1030 monitors a single fan speed, while the ADM1031 monitors up to | ||
two. Each fan channel has its own low speed limit. |
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