[lm-sensors] IT8721F/IT8758E support

[lm-sensors] IT8721F/IT8758E support

[Jean Delvare]

Hi Patrick, Jae, Virgil,

I am done adding support for the IT8721F/IT8758E to the it87 Linux
driver. You can download a stand-alone version of the driver at:
  http://khali.linux-fr.org/devel/misc/it87/

Please test and report :) Beware the code is untested so far, as I
don't have this chip at hand.

Patrick, note that with an Asus board, it is entirely possible that the
it87 driver can't be loaded due to ACPI requesting the I/O ports
(you'll get a warning in the kernel log in that case) and you have to
use the asus_atk0110 driver instead.

-- 
Jean Delvare
http://khali.linux-fr.org/wishlist.html

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Re: [lm-sensors] IT8721F/IT8758E support

[Patrick Nagelschmidt]

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Re: [lm-sensors] IT8721F/IT8758E support

[Jean Delvare]

Hi Patrick,

On Mon, 11 Oct 2010 22:54:26 +0200, Patrick Nagelschmidt wrote:
> you're right:
> it87: Found IT8721F chip at 0x290, revision 1
> ACPI: resource it87 [io  0x0295-0x0296] conflicts with ACPI region SIOE [??? 0x00000290-0x000002af flags 0x45]
> ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver
> but the asus_atk0110 did the trick:
> k10temp-pci-00c3
> Adapter: PCI adapter
> temp1:       +25.2°C  (high = +70.0°C, crit = +99.5°C)
> 
> atk0110-acpi-0
> Adapter: ACPI interface
> Vcore Voltage:     +1.33 V  (min =  +0.85 V, max =  +1.60 V)
>  +3.3 Voltage:     +3.33 V  (min =  +2.97 V, max =  +3.63 V)
>  +5 Voltage:       +4.89 V  (min =  +4.50 V, max =  +5.50 V)
>  +12 Voltage:     +12.08 V  (min = +10.20 V, max = +13.80 V)
> CPU FAN Speed:    2280 RPM  (min =  600 RPM)
> CHASSIS FAN Speed: 511 RPM  (min =  600 RPM)
> CPU Temperature:   +34.0°C  (high = +60.0°C, crit = +95.0°C)
> MB Temperature:    +37.0°C  (high = +45.0°C, crit = +75.0°C)
> Btw, can you detect the mainboard vendor?

Yes, we already do.

> If you can it would probably be a solution to recommend using this module for asus-owners in general.

The problem is that not all Asus board use that driver. Old Asus boards
don't have the ATK0110 virtual drivers, some more recent boards do have
it but it isn't usable, and server boards need native drivers instead of
ACPI.

> As it seems lm-sensors is capable of much more than the scan makes you think in the first place when it announces it has no driver for the sensor found :)

We have a few tickets opened for this:
  http://www.lm-sensors.org/ticket/2374
  http://www.lm-sensors.org/ticket/2373
But this isn't trivial, it will take some time and thinking to get it
done properly.

Note that the asus_atk0110 driver normally loads automatically on
systems which need it, which mitigates the issue.

> Thanks for your efforts, greatly appreciate the fast reaction :)

You're welcome.

-- 
Jean Delvare
http://khali.linux-fr.org/wishlist.html

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Re: [lm-sensors] IT8721F/IT8758E support

[Luca Tettamanti]

On Tue, Oct 12, 2010 at 11:31 AM, Jean Delvare <khali@linux-fr.org> wrote:
>> If you can it would probably be a solution to recommend using this module for asus-owners in general.
>
> The problem is that not all Asus board use that driver. Old Asus boards
> don't have the ATK0110 virtual drivers, some more recent boards do have
> it but it isn't usable, and server boards need native drivers instead of
> ACPI.

This issue came up before, the main problem is that to reliably
identify ATK0110 you need an ACPI disassembler in user space (i.e.
iasl). OTHO atk0110 driver is loaded automagically and does not need
any configuration... so I guess that the problem with sensors-detect
is only for users that build a custom kernel; in this case a
suggestion based on DMI entries may be enough.

Luca

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