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https://github.com/lm-sensors/lm-sensors.git
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Mark D. Studebaker
ffedd9fa93
The temperature registers are in different places for the two
versions. Both versions unfortunately have the same PCI ID.
Apparently the temperature conversion formulas are different
for the two versions. Neither is yet implemented in the driver.
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1070 7894878c-1315-0410-8ee3-d5d059ff63e0
143 lines
7.0 KiB
Plaintext
143 lines
7.0 KiB
Plaintext
Kernel driver `sis5595.o'
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=========================
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Status: Complete and tested
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Supported chips:
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* Silicon Integrated Systems Corp. SiS5595 Southbridge Hardware Monitor
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Prefix: sis5595
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Addresses scanned: ISA in PCI-space encoded address
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Datasheet: Publicly available at the Silicon Integrated Systems Corp. site.
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Supports following revisions:
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Version PCI ID PCI Revision
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1 1039/0008 01
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2 1039/0008 C0
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Author: Kyösti Mälkki <kmalkki@cc.hut.fi>
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Module Parameters
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-----------------
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None
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Description
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-----------
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The Sis5595 southbridge has integrated hardware monitor functions.
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It also has an I2C bus, but this driver only supports the hardware monitor.
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For the I2C bus driver see i2c-sis5595.
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The SiS5595 implements zero or one temperature sensor, two FAN speed
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sensors, four or five voltage sensors, and alarms.
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On the first version of the chip, there are four voltage
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sensors and one temperature sensor.
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On the second version of the chip,
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the temperature sensor (temp) and the fifth voltage sensor (in4) share a pin
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which is configurable, but not through the driver. Sorry.
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The driver senses the configuration of the pin, which was hopefully
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set by the BIOS.
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If the temperature function is enabled, in4 will return 0.
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If the in4 function is enabled, temp will return 0.
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Temperatures are measured in degrees Celcius. An alarm is triggered once
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when the max is crossed; it is also triggered
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when it drops below the min value.
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Measurements are guaranteed
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between -55 and +125 degrees, with a resolution of 1 degree.
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FAN rotation speeds are reported in RPM (rotations per minute). An alarm is
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triggered if the rotation speed has dropped below a programmable limit. FAN
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readings can be divided by a programmable divider (1, 2, 4 or 8) to give
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the readings more range or accuracy. This is important because some FANs
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report only one 'tick' each rotation, while others report two - making
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all readings twice as high. Not all RPM values can accurately be represented,
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so some rounding is done. With a divider of 2, the lowest representable
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value is around 2600 RPM.
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Voltage sensors (also known as IN sensors) report their values in volts.
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An alarm is triggered if the voltage has crossed a programmable minimum
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or maximum limit. Note that minimum in this case always means 'closest to
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zero'; this is important for negative voltage measurements. All voltage
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inputs can measure voltages between 0 and 4.08 volts, with a resolution
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of 0.016 volt.
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In addition to the alarms described above, there is a BTI alarm, which gets
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triggered when an external chip has crossed its limits. Usually, this is
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connected to some LM75-like chip; if at least one crosses its limits, this
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bit gets set.
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If an alarm triggers, it will remain triggered until the hardware register
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is read at least once. This means that the cause for the alarm may
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already have disappeared! Note that in the current implementation, all
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hardware registers are read whenever any data is read (unless it is less
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than 1.5 seconds since the last update). This means that you can easily
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miss once-only alarms.
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The Sis5595 only updates its values each 1.5 seconds; reading it more often
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will do no harm, but will return 'old' values.
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Chip Features
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-------------
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Chip `sis5595'
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LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
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in0 NONE NONE R 2
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in1 NONE NONE R 2
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in2 NONE NONE R 2
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in3 NONE NONE R 2
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in4 NONE NONE R 2
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in0_min in0 in0 RW 2
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in1_min in1 in1 RW 2
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in2_min in2 in2 RW 2
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in3_min in3 in3 RW 2
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in4_min in4 in4 RW 2
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in0_max in0 in0 RW 2
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in1_max in1 in1 RW 2
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in2_max in2 in2 RW 2
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in3_max in3 in3 RW 2
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in4_max in4 in4 RW 2
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fan1 NONE NONE R 0
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fan2 NONE NONE R 0
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fan1_min fan1 fan1 RW 0
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fan2_min fan2 fan2 RW 0
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temp NONE NONE R 1
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temp_hyst temp temp RW 1
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temp_over temp temp RW 1
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fan1_div fan1 NONE RW 0
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fan2_div fan2 NONE RW 0
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alarms NONE NONE R 0
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LABEL FEATURE SYMBOL SYSCTL FILE:NR
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in0 SENSORS_SIS5595_IN0 in0:3
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in1 SENSORS_SIS5595_IN1 in1:3
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in2 SENSORS_SIS5595_IN2 in2:3
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in3 SENSORS_SIS5595_IN3 in3:3
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in4 SENSORS_SIS5595_IN4 in3:3
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in0_min SENSORS_SIS5595_IN0_MIN in0:1
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in1_min SENSORS_SIS5595_IN1_MIN in1:1
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in2_min SENSORS_SIS5595_IN2_MIN in2:1
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in3_min SENSORS_SIS5595_IN3_MIN in3:1
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in4_min SENSORS_SIS5595_IN4_MIN in4:1
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in0_max SENSORS_SIS5595_IN0_MAX in0:2
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in1_max SENSORS_SIS5595_IN1_MAX in1:2
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in2_max SENSORS_SIS5595_IN2_MAX in2:2
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in3_max SENSORS_SIS5595_IN3_MAX in3:2
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in4_max SENSORS_SIS5595_IN4_MAX in4:2
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fan1 SENSORS_SIS5595_FAN1 fan1:2
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fan2 SENSORS_SIS5595_FAN2 fan2:2
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fan1_min SENSORS_SIS5595_FAN1_MIN fan1:1
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fan2_min SENSORS_SIS5595_FAN2_MIN fan2:1
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temp SENSORS_SIS5595_TEMP temp:3
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temp_hyst SENSORS_SIS5595_TEMP_HYST temp:2
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temp_over SENSORS_SIS5595_TEMP_OVER temp:1
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fan1_div SENSORS_SIS5595_FAN1_DIV fan_div:1
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fan2_div SENSORS_SIS5595_FAN2_DIV fan_div:2
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alarms SENSORS_SIS5595_ALARMS alarms:1
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