[lm-sensors] IT8721F fan control?

[Alexandros Diamantidis <adia@hellug.gr>]

Hello!

I've just gotten an ASUS M4A87TD/USB3 motherboard, which has an IT8721F
chip. Although I've enabled a "silent" BIOS setting, the new system runs
its fans pretty fast and noisily, so I'm interested in controlling their
speed for quieter operation.

After a few web searches, I gather that IT8721F isn't completely
supported yet but it's being worked on - so thanks a lot for your work
on this!

Anyway, I just wanted to report that with with the new driver from
http://khali.linux-fr.org/devel/misc/it87/, sensors reports:

--------------------------------------------------------------------
k10temp-pci-00c3
Adapter: PCI adapter
temp1:       +20.0°C  (high = +70.0°C, crit = +90.0°C)  

radeon-pci-0500
Adapter: PCI adapter
temp1:       +50.0°C                                    

it8721-isa-0290
Adapter: ISA adapter
in0:         +2.81 V  (min =  +1.08 V, max =  +2.22 V)   ALARM
in1:         +2.76 V  (min =  +0.00 V, max =  +0.41 V)   ALARM
in2:         +1.31 V  (min =  +0.71 V, max =  +2.69 V)   
+3.3V:       +3.31 V  (min =  +5.66 V, max =  +5.35 V)   ALARM
in4:         +2.47 V  (min =  +0.74 V, max =  +0.88 V)   ALARM
in5:         +1.26 V  (min =  +1.33 V, max =  +2.76 V)   ALARM
in6:         +1.69 V  (min =  +2.48 V, max =  +0.35 V)   ALARM
3VSB:        +5.35 V  (min =  +5.71 V, max =  +1.30 V)   ALARM
Vbat:        +3.38 V
fan1:       1573 RPM  (min =   11 RPM)
fan2:       1819 RPM  (min =   11 RPM)
fan3:       1229 RPM  (min =   12 RPM)
temp1:       +28.0°C  (low  = +62.0°C, high = -118.0°C)  ALARM  sensor = thermistor
temp2:       +23.0°C  (low  = -53.0°C, high = -35.0°C)  sensor = thermistor
temp3:      -128.0°C  (low  =  -9.0°C, high =  -2.0°C)  sensor = disabled
--------------------------------------------------------------------

From dmesg:

it87: Found IT8721F chip at 0x290, revision 1
ACPI: resource it87 [io  0x0295-0x0296] conflicts with ACPI region ECRE [io  0x0290-0x02af pref window disabled]
ACPI: This conflict may cause random problems and system instability
ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver

It seems that pwmconfig doesn't do anything... should it have worked or
is support for fan control still incomplete?

For reference, with asus_atk0110 sensors reports:

--------------------------------------------------------------------
k10temp-pci-00c3
Adapter: PCI adapter
temp1:       +21.0°C  (high = +70.0°C, crit = +90.0°C)

atk0110-acpi-0
Adapter: ACPI interface
Vcore Voltage:     +1.31 V  (min =  +0.80 V, max =  +1.60 V)
+3.3V Voltage:     +3.31 V  (min =  +2.97 V, max =  +3.63 V)
+5V Voltage:       +4.93 V  (min =  +4.50 V, max =  +5.50 V)
+12V Voltage:     +12.05 V  (min = +10.20 V, max = +13.80 V)
CPU Fan Speed:    675000 RPM  (min =  600 RPM)
Chassis Fan Speed:1844 RPM  (min =  600 RPM)
Power Fan Speed:  1240 RPM  (min =  600 RPM)
CPU Temperature:   +29.0°C  (high = +60.0°C, crit = +95.0°C)
MB Temperature:    +23.0°C  (high = +45.0°C, crit = +75.0°C)

radeon-pci-0500
Adapter: PCI adapter
temp1:       +53.0°C
--------------------------------------------------------------------

sensors-detect from lm-sensors 3.1.2 reports:

Probing for Super-I/O at 0x2e/0x2f
[...]
Trying family `ITE'...                                      Yes
Found unknown chip with ID 0x8721
    (logical device 4 has address 0x290, could be sensors)


Thanks again,
Alexandros

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