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
