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Kernel driver `w83792d.o'
=========================
Status: W83792D support is complete and well-tested.
Supported chips:
* Winbond W83792D
Prefix 'w83792d'
Addresses scanned: I2C 0x2c - 0x2f (inclusive)
Datasheet: Available to LM_Sensors group, sent by Chunhao Huang
Author: Chunhao Huang @ Winbond <huang0@winbond.com.tw>
Module Parameters
-----------------
<TODO: fill in here>
Description
-----------
This driver implements support for the Winbond W83792AD/D.
Detection of the chip can sometimes be foiled because it can be in
an internal state that allows no clean access. If you know the address
of the chip, use a 'force' parameter; this will put it into a more
well-behaved state first.
The driver implements three temperature sensors, seven FAN rotation speed
sensors, nine voltage sensors, and the Smart Fan I(Thermal Cruise mode)
and Smart Fan II sensors.
Temperatures are measured in degrees Celcius. There is one main temperature
sensor, and two other sensors. A alarm is triggered when the measured
temperture is higher than the Overtemperature or below the Hysteresis value.
This is NOT correct, I misunderstand the Hysteresis value when I implement
this driver. It will be fixed later: An alarm is triggered when the
Overtemperature Shutdown limit is crossed; it is triggered again as soon as
it drops below the Hysteresis value.
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, 8, 16, 32, 64 or
128) to give the readings more range or accuracy. This driver modify the
fan divisor automatically to get the reasonable RPM rotation range.
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.
All the alarm triggers is "software-level" instead of "hardware-level",
which means the alarm is triggered when "sensors" program find the measured
value exceed the limits, while in traditional chip drivers of lm_sensors,
alarm is triggered by the hardware interrupt status registers.
After a discusion with lm_sensors group, the "software-level" alarm method
to temperature may be modified in the future, but the alarm of voltage and
fan will not be modified, because W83792AD/D does NOT support it.
In addition to the alarms described above, there is a CHAS alarm on the
chips which triggers if your computer case is open.
The chips only update values each 3 seconds; reading them more often will
do no harm, but will return 'old' values.
W83792D PROBLEMS
-----------------
Known problems:
- This driver is only for Winbond W83792D C version device, there
are also some motherboards with B version W83792D device. The
calculation method to in6-in7(measured value, limits) is a little
different between C and B version. C or B version can be identified
by CR[0x49h].
- The function of vid and vrm has not been finished, because I'm NOT
very familiar with them. If someone can finish it, that's good,
- The function of chassis open detection need further test.
Chip Features
-------------
Chip `w83792d'
LABEL LABEL CLASS COMPUTE CLASS ACCESS MAGNITUDE
in0 NONE NONE R 3
in1 NONE NONE R 3
in2 NONE NONE R 3
in3 NONE NONE R 3
in4 NONE NONE R 3
in5 NONE NONE R 3
in6 NONE NONE R 3
in7 NONE NONE R 3
in8 NONE NONE R 3
in0_min in0 in0 RW 3
in1_min in1 in1 RW 3
in2_min in2 in2 RW 3
in3_min in3 in3 RW 3
in4_min in4 in4 RW 3
in5_min in5 in5 RW 3
in6_min in6 in6 RW 3
in7_min in7 in7 RW 3
in8_min in8 in8 RW 3
in0_max in0 in0 RW 3
in1_max in1 in1 RW 3
in2_max in2 in2 RW 3
in3_max in3 in3 RW 3
in4_max in4 in4 RW 3
in5_max in5 in5 RW 3
in6_max in6 in6 RW 3
in7_max in7 in7 RW 3
in8_max in8 in8 RW 3
fan1 NONE NONE R 0
fan2 NONE NONE R 0
fan3 NONE NONE R 0
fan4 NONE NONE R 0
fan5 NONE NONE R 0
fan6 NONE NONE R 0
fan7 NONE NONE R 0
fan1_min fan1 NONE RW 0
fan2_min fan2 NONE RW 0
fan3_min fan3 NONE RW 0
fan4_min fan4 NONE RW 0
fan5_min fan5 NONE RW 0
fan6_min fan6 NONE RW 0
fan7_min fan7 NONE RW 0
temp1 NONE NONE R 1
temp1_hyst temp1 temp1 RW 1
temp1_over temp1 temp1 RW 1
temp2 NONE NONE R 1
temp2_hyst temp2 temp2 RW 1
temp2_over temp2 temp2 RW 1
temp3 NONE NONE R 1
temp3_hyst temp3 temp3 RW 1
temp3_over temp3 temp3 RW 1
fan1_div fan1 NONE RW 0
fan2_div fan2 NONE RW 0
fan3_div fan3 NONE RW 0
fan4_div fan4 NONE RW 0
fan5_div fan5 NONE RW 0
fan6_div fan6 NONE RW 0
fan7_div fan7 NONE RW 0
LABEL FEATURE SYMBOL SYSCTL FILE:NR
in0 SENSORS_W83792D_IN0 in0:3
in1 SENSORS_W83792D_IN1 in1:3
in2 SENSORS_W83792D_IN2 in2:3
in3 SENSORS_W83792D_IN3 in3:3
in4 SENSORS_W83792D_IN4 in4:3
in5 SENSORS_W83792D_IN5 in5:3
in6 SENSORS_W83792D_IN6 in6:3
in7 SENSORS_W83792D_IN7 in7:3
in8 SENSORS_W83792D_IN8 in8:3
in0_min SENSORS_W83792D_IN0_MIN in0:1
in1_min SENSORS_W83792D_IN1_MIN in1:1
in2_min SENSORS_W83792D_IN2_MIN in2:1
in3_min SENSORS_W83792D_IN3_MIN in3:1
in4_min SENSORS_W83792D_IN4_MIN in4:1
in5_min SENSORS_W83792D_IN5_MIN in5:1
in6_min SENSORS_W83792D_IN6_MIN in6:1
in7_min SENSORS_W83792D_IN7_MIN in7:1
in8_min SENSORS_W83792D_IN8_MIN in8:1
in0_max SENSORS_W83792D_IN0_MAX in0:2
in1_max SENSORS_W83792D_IN1_MAX in1:2
in2_max SENSORS_W83792D_IN2_MAX in2:2
in3_max SENSORS_W83792D_IN3_MAX in3:2
in4_max SENSORS_W83792D_IN4_MAX in4:2
in5_max SENSORS_W83792D_IN5_MAX in5:2
in6_max SENSORS_W83792D_IN6_MAX in6:2
in7_max SENSORS_W83792D_IN7_MAX in7:2
in8_max SENSORS_W83792D_IN8_MAX in8:2
fan1 SENSORS_W83792D_FAN1 fan1:2
fan2 SENSORS_W83792D_FAN2 fan2:2
fan3 SENSORS_W83792D_FAN3 fan3:2
fan4 SENSORS_W83792D_FAN4 fan4:2
fan5 SENSORS_W83792D_FAN5 fan5:2
fan6 SENSORS_W83792D_FAN6 fan6:2
fan7 SENSORS_W83792D_FAN7 fan7:2
fan1_min SENSORS_W83792D_FAN1_MIN fan1:1
fan2_min SENSORS_W83792D_FAN2_MIN fan2:1
fan3_min SENSORS_W83792D_FAN3_MIN fan3:1
fan4_min SENSORS_W83792D_FAN4_MIN fan4:1
fan5_min SENSORS_W83792D_FAN5_MIN fan5:1
fan6_min SENSORS_W83792D_FAN6_MIN fan6:1
fan7_min SENSORS_W83792D_FAN7_MIN fan7:1
temp1 SENSORS_W83792D_TEMP1 temp1:3
temp1_hyst SENSORS_W83792D_TEMP1_HYST temp1:2
temp1_over SENSORS_W83792D_TEMP1_OVER temp1:1
temp2 SENSORS_W83792D_TEMP2 temp2:3
temp2_hyst SENSORS_W83792D_TEMP2_HYST temp2:2
temp2_over SENSORS_W83792D_TEMP2_OVER temp2:1
temp3 SENSORS_W83792D_TEMP3 temp3:3
temp3_hyst SENSORS_W83792D_TEMP3_HYST temp3:2
temp3_over SENSORS_W83792D_TEMP3_OVER temp3:1
fan1_div SENSORS_W83792D_FAN1_DIV fan_div:1
fan2_div SENSORS_W83792D_FAN2_DIV fan_div:2
fan3_div SENSORS_W83792D_FAN3_DIV fan_div:3
fan4_div SENSORS_W83792D_FAN4_DIV fan_div:4
fan5_div SENSORS_W83792D_FAN5_DIV fan_div:5
fan6_div SENSORS_W83792D_FAN6_DIV fan_div:6
fan7_div SENSORS_W83792D_FAN7_DIV fan_div:7
/PROC ENTRIES
-------------
Most are identical to the w83781d entries. See the w83781d documentation for
details.
Most of the additional entries not in the w83781d are Winbond Smart Fan I/II:
Please read "7.7 FAN Speed Count and FAN Speed Control" of W83792AD/D datasheet
before you read the explanation to the /proc entries below.
fan_cfg: indicates the fan speed control mode: 0 means PWM/DC mode,
1 means Smart Fan I(Thermal Cruise) mode, 2 or 3 means Smart Fan II
mode. There are three items in this entry, the first one is the
configuration of Fan1, the rest may be deduced by analogy.
pwm_flag: valid under PWM/DC mode, 1 means PWM mode, 0 means DC mode.
There are three items in this entry, the first one is PWM/DC mode
of Fan1, the rest may be deduced by analogy.
thermal_cruise: valid under Smart Fan I mode, indicates the wanted
temperature. There are three items in this entry, the first one
is setting temperature of Fan1, the rest may be deduced by analogy.
fan_tolerance: valid under Smart Fan I or Smart Fan II mode, indicates
the interval temperature. There are also three items in this entry.
sf2_points_fan1: valid under Smart Fan II mode, there are four items in
this entry, indicates the Temp.[1-4] in "Figure 8. Smart Fan II
behavior" to Fan1.
sf2_points_fan2: almost same as the above one, except that this entry
is for Fan2.
sf2_points_fan3: almost same as the above one, except that this entry
is for Fan3.
sf2_levels_fan1: valid under Smart Fan II mode, there are four items in
this entry, indicates the "Non-Stop Duty Cycle" and "Fan Duty Cycle
Level [1-3]" in "Figure 8. Smart Fan II behavior" to Fan1. The
first item "Non-Stop Duty Cycle" is read only in this driver, while
the other three items can be modified.
sf2_levels_fan2: almost same as the above one, except that this entry
is for Fan2.
sf2_levels_fan3: almost same as the above one, except that this entry
is for Fan3.
additional entries for chassis intrusion detection:
chassis: There are two items in this entry, the first one indicats the
chassis status, 1 means chassis intrusion detected, while 1 means
normal. The second item in this entry is used to clear the
detected chassis intrusion interrupt and reset the chassis status
to normal.
Author/Maintainer
-----------------
Original 792D support: Chunhao Huang(huang0@winbond.com.tw)
subclients register added by: Mark D. Studebaker(mdsxyz123@yahoo.com)
and modified by Jean Delvare <khali@linux-fr.org>.
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