mirror of
https://github.com/lm-sensors/lm-sensors.git
synced 2026-10-22 11:46:03 +00:00
Mark D. Studebaker
0086b4d99e
git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@746 7894878c-1315-0410-8ee3-d5d059ff63e0
135 lines
6.8 KiB
Plaintext
135 lines
6.8 KiB
Plaintext
Kernel driver `sis5595.o'
|
|
=========================
|
|
|
|
Status: Complete and tested
|
|
|
|
Supported chips:
|
|
* Silicon Integrated Systems Corp. SiS5595 Southbridge Hardware Monitor
|
|
Prefix: sis5595
|
|
Addresses scanned: ISA in PCI-space encoded address
|
|
Datasheet: Publicly available at the Silicon Integrated Systems Corp. site.
|
|
|
|
Author: Kyösti Mälkki <kmalkki@cc.hut.fi>
|
|
|
|
|
|
Module Parameters
|
|
-----------------
|
|
|
|
* force: short array (min = 1, max = 48)
|
|
List of adapter,address pairs to boldly assume to be present
|
|
* force_sis5595: short array (min = 1, max = 48)
|
|
List of adapter,address pairs which are unquestionably assumed to contain
|
|
a `sis5595' chip
|
|
* ignore: short array (min = 1, max = 48)
|
|
List of adapter,address pairs not to scan
|
|
* ignore_range: short array (min = 1, max = 48)
|
|
List of adapter,start-addr,end-addr triples not to scan
|
|
* probe: short array (min = 1, max = 48)
|
|
List of adapter,address pairs to scan additionally
|
|
* probe_range: short array (min = 1, max = 48)
|
|
List of adapter,start-addr,end-addr triples to scan additionally
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
The Sis5595 southbridge has integrated hardware monitor functionality.
|
|
It also has an I2C bus, but this driver only supports the hardware monitor.
|
|
|
|
The SiS5595 implements one temperature sensor, two FAN rotation speed
|
|
sensors, four voltage sensors and alarms.
|
|
|
|
Temperatures are measured in degrees Celcius. An alarm is triggered once
|
|
when the Overtemperature Shutdown limit is crossed; it is triggered again
|
|
as soon as it drops below the Hysteresis value. A more useful behaviour
|
|
can be found by setting the Hysteresis value to +127 degrees Celcius; in
|
|
this case, alarms are issued during all the time when the actual temperature
|
|
is above the Overtemperature Shutdown value. Measurements are guaranteed
|
|
between -55 and +125 degrees, with a resolution of 1 degree.
|
|
|
|
FAN rotation speeds are reported in RPM (rotations per minute). An alarm is
|
|
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. This is important because some FANs
|
|
report only one 'tick' each rotation, while others report two - making
|
|
all readings twice as high. 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 maximum limit. Note that minimum in this case always means 'closest to
|
|
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.
|
|
|
|
In addition to the alarms described above, there is a BTI alarm, which gets
|
|
triggered when an external chip has crossed its limits. Usually, this is
|
|
connected to some LM75-like chip; if at least one crosses its limits, this
|
|
bit gets set.
|
|
|
|
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 1.5 seconds since the last update). This means that you can easily
|
|
miss once-only alarms.
|
|
|
|
The Sis5595 only updates its values each 1.5 seconds; reading it more often
|
|
will do no harm, but will return 'old' values.
|
|
|
|
|
|
Chip Features
|
|
-------------
|
|
|
|
Chip `sis5595'
|
|
LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
|
|
in0 NONE NONE R 2
|
|
in1 NONE NONE R 2
|
|
in2 NONE NONE R 2
|
|
in3 NONE NONE R 2
|
|
in0_min in0 in0 RW 2
|
|
in1_min in1 in1 RW 2
|
|
in2_min in2 in2 RW 2
|
|
in3_min in3 in3 RW 2
|
|
in0_max in0 in0 RW 2
|
|
in1_max in1 in1 RW 2
|
|
in2_max in2 in2 RW 2
|
|
in3_max in3 in3 RW 2
|
|
fan1 NONE NONE R 0
|
|
fan2 NONE NONE R 0
|
|
fan1_min fan1 fan1 RW 0
|
|
fan2_min fan2 fan2 RW 0
|
|
temp NONE NONE R 1
|
|
temp_hyst temp temp RW 1
|
|
temp_over temp temp RW 1
|
|
fan1_div fan1 NONE RW 0
|
|
fan2_div fan2 NONE RW 0
|
|
alarms NONE NONE R 0
|
|
|
|
LABEL FEATURE SYMBOL SYSCTL FILE:NR
|
|
in0 SENSORS_SIS5595_IN0 in0:3
|
|
in1 SENSORS_SIS5595_IN1 in1:3
|
|
in2 SENSORS_SIS5595_IN2 in2:3
|
|
in3 SENSORS_SIS5595_IN3 in3:3
|
|
in0_min SENSORS_SIS5595_IN0_MIN in0:1
|
|
in1_min SENSORS_SIS5595_IN1_MIN in1:1
|
|
in2_min SENSORS_SIS5595_IN2_MIN in2:1
|
|
in3_min SENSORS_SIS5595_IN3_MIN in3:1
|
|
in0_max SENSORS_SIS5595_IN0_MAX in0:2
|
|
in1_max SENSORS_SIS5595_IN1_MAX in1:2
|
|
in2_max SENSORS_SIS5595_IN2_MAX in2:2
|
|
in3_max SENSORS_SIS5595_IN3_MAX in3:2
|
|
fan1 SENSORS_SIS5595_FAN1 fan1:2
|
|
fan2 SENSORS_SIS5595_FAN2 fan2:2
|
|
fan1_min SENSORS_SIS5595_FAN1_MIN fan1:1
|
|
fan2_min SENSORS_SIS5595_FAN2_MIN fan2:1
|
|
temp SENSORS_SIS5595_TEMP temp:3
|
|
temp_hyst SENSORS_SIS5595_TEMP_HYST temp:2
|
|
temp_over SENSORS_SIS5595_TEMP_OVER temp:1
|
|
fan1_div SENSORS_SIS5595_FAN1_DIV fan_div:1
|
|
fan2_div SENSORS_SIS5595_FAN2_DIV fan_div:2
|
|
alarms SENSORS_SIS5595_ALARMS alarms:1
|
|
|
|
|