[lm-sensors] Tyan S2696 and ADT7470

[Vadim Zeitlin]

 Hello and happy new year to all!

 First of all, I'm using 2.6.20-rc3 with the svn version of lm-sensors and
the patches

http://lists.lm-sensors.org/pipermail/lm-sensors/2006-December/018420.html
http://lists.lm-sensors.org/pipermail/lm-sensors/2006-October/018128.html

(coretemp and *_msr visibility). The kernel was built with standard Debian
options using gcc 4.1.


 Now my problem is that I'm trying to set up lm-sensors on a machine using
Tyan Tempest i5000XT motherboard (also known as S2696, please see
http://www.tyan.com/products/html/tempesti5000xt.html). It has, according
both to the specifications and sensors-detect output, not one but 2
hardware monitoring chips: W83627EHG and ADT7470:

	# sensors-detect
	...
	Now follows a summary of the probes I have just done.
	Just press ENTER to continue:

	Driver `to-be-written' (should be inserted):
	  Detects correctly:
	  * Bus `SMBus I801 adapter at 18c0'
	    Busdriver `i2c-i801', I2C address 0x2e
	    Chip `Analog Devices ADT7470' (confidence: 5)
	  * Chip `Intel AMB FB-DIMM thermal sensor' (confidence: 9)

	Driver `w83627ehf' (should be inserted):
	  Detects correctly:
	  * ISA bus, address 0xc00
	    Chip `Winbond W83627EHF/EHG Super IO Sensors' (confidence: 9)

	Driver `coretemp' (should be inserted):
	  Detects correctly:
	  * Chip `Intel Core family thermal sensor' (confidence: 9)

Unfortunately it looks that the case fans -- which create the deafening
noise making the machine all but unusable currently -- are connected to
ADT7470 and not the W83627EHG because

	# sensors
	coretemp-isa-0000
	Adapter: ISA adapter
	temp1:       +29 C  (high =   +85 C)

	coretemp-isa-0001
	Adapter: ISA adapter
	temp1:       +33 C  (high =   +85 C)

	coretemp-isa-0002
	Adapter: ISA adapter
	temp1:       +32 C  (high =   +85 C)

	coretemp-isa-0003
	Adapter: ISA adapter
	temp1:       +33 C  (high =   +85 C)

	w83627ehf-isa-0c00
	Adapter: ISA adapter
	VCore:     +1.21 V  (min =  +0.00 V, max =  +1.74 V)
	in1:       +8.29 V  (min = +13.46 V, max = +13.36 V) ALARM
	AVCC:      +3.31 V  (min =  +3.87 V, max =  +4.02 V) ALARM
	3VCC:      +3.33 V  (min =  +2.91 V, max =  +2.93 V) ALARM
	in4:       +1.26 V  (min =  +2.00 V, max =  +1.87 V) ALARM
	in5:       +1.60 V  (min =  +1.86 V, max =  +1.50 V) ALARM
	in6:       +5.02 V  (min =  +3.23 V, max =  +4.56 V) ALARM
	VSB:       +3.28 V  (min =  +0.69 V, max =  +3.06 V) ALARM
	VBAT:      +1.52 V  (min =  +2.16 V, max =  +2.48 V) ALARM
	in9:       +1.09 V  (min =  +0.78 V, max =  +1.52 V)
	Case Fan:    0 RPM  (min = 3515 RPM, div = 128) ALARM
	CPU Fan:  2083 RPM  (min = 5921 RPM, div = 4) ALARM
	Aux Fan:     0 RPM  (min =  811 RPM, div = 128) ALARM
	fan5:        0 RPM  (min = 168750 RPM, div = 8) ALARM
	Sys Temp:    +39 C  (high =   -65 C, hyst =   -75 C)   ALARM
	CPU Temp:  +34.5 C  (high = +80.0 C, hyst = +75.0 C)
	AUX Temp:  +33.5 C  (high = +80.0 C, hyst = +75.0 C)

(notice the zeros for the case and aux fans). Unsurprisingly, running
pwmconfig or writing directly to the files mentioned in Documentation/
hwmon/w83627ehf doesn't affect these fans. More surprisingly, it doesn't
seem to affect the CPU fan(s) neither but I don't care much about it as
they're not very noisy anyhow. I care a lot about the 2 case fans though so
I'd just like to ask if I am doing something wrong with w83627ehf or is it
just that my guess that these fans are handled by ADT7470 is correct?

 And, in the latter case, is there any hope for ADT7470 support? I'd be
very willing to help as much as I can but unfortunately I don't really know
much about this stuff so I'm afraid I have no chance without some/lots of
guidance. Of course, I'd be also happy to provide any additional
information that might help.

 Thanks in advance!
VZ