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* [lm-sensors] adt7475 support (Asus M2N-SLI Deluxe)
@ 2008-01-21 20:52 Matt Roberds
  2008-01-22 21:10 ` Hans de Goede
                   ` (10 more replies)
  0 siblings, 11 replies; 12+ messages in thread
From: Matt Roberds @ 2008-01-21 20:52 UTC (permalink / raw)
  To: lm-sensors

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Hello all!

I recently built a system using an Asus M2N-SLI Deluxe motherboard,
which has an Analog Devices ADT7475 thermal monitor and fan control
chip.  sensors-detect knows about it but says there is no driver.  I've
been looking through the mailing list archives and found a post from
Hans de Goede in December with a partial driver (see
http://lists.lm-sensors.org/pipermail/lm-sensors/2007-December/022169.html ).

I downloaded that driver and it built as a module under kernel 2.6.18,
after commenting out a few lines of code.  sensors (from lm-sensors
3.0.0) says:

---
adt7475-i2c-5-2e
Adapter: SMBus nForce2 adapter at 1c40
in0:         +0.03 V  (min =  +0.00 V, max =  +7.47 V)
in1:        +32.42 V  (min =  +0.00 V, max = +10.71 V)
fan1:          0 RPM  (min =    0 RPM)
fan2:          0 RPM  (min =    0 RPM)
fan3:          0 RPM  (min =    0 RPM)
fan4:          0 RPM  (min =    0 RPM)
temp1:       -64.0°C  (low  =  +1.0°C, high = +127.0°C)
temp2:       +39.5°C  (low  =  +1.0°C, high = +127.0°C)
temp3:       -64.0°C  (low  =  +1.0°C, high = +127.0°C)
---

so at least the temp2 value seems to be working.

This motherboard has two sensor chips: an ITE IT8716F and the ADT7475.
I suspect that the IT8716 is used as a monitor (read only) for fan
speeds, temperatures, and voltages, while the ADT7475 is actually
controlling the fan speeds.  Interestingly, the motherboard has four
chassis fan connectors, and the ADT7475 seems to have four fan control
channels.  I don't yet have any fans plugged into the chassis fan
connectors on the motherboard, so it could be that those channels
are working correctly and reporting the truth: there are no fans
plugged in.  (I do have a couple of spare fans I could plug in for
testing.)

One complication is that Analog Devices seems to have sold this line of
chips to ON Semiconductor, and ON doesn't yet have the data sheet for
the ADT7475 online.  I was able to get it from one of those data sheet
archives, and have posted it at
http://members.cox.net/~mroberds/adt7475-datasheet.pdf .

I'd like to get this driver fully working.  I can hack on it myself,
or test code that other people have hacked on.  What is the best way
to proceed?

Thanks!

Matt Roberds

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^ permalink raw reply	[flat|nested] 12+ messages in thread

end of thread, other threads:[~2008-02-18 19:50 UTC | newest]

Thread overview: 12+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-01-21 20:52 [lm-sensors] adt7475 support (Asus M2N-SLI Deluxe) Matt Roberds
2008-01-22 21:10 ` Hans de Goede
2008-01-22 22:55 ` Jordan Crouse
2008-01-22 23:47 ` Jordan Crouse
2008-01-24 16:37 ` Matt Roberds
2008-01-24 21:57 ` Jordan Crouse
2008-02-13 16:53 ` Artur Szymiec
2008-02-18 17:00 ` Jordan Crouse
2008-02-18 17:34 ` Artur Szymiec
2008-02-18 18:00 ` Hans de Goede
2008-02-18 19:01 ` Artur Szymiec
2008-02-18 19:50 ` Jean Delvare

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