linux-kernel - Re: [lm-sensors] it87 sensors need an ACPI driver (2.6.31)

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Date:	Mon, 5 Oct 2009 17:37:29 +0200
From:	Luca Tettamanti <kronos.it@...il.com>
To:	Brad Campbell <brad@...p.net.au>
Cc:	lm-sensors@...sensors.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [lm-sensors] it87 sensors need an ACPI driver (2.6.31)

On Mon, Oct 5, 2009 at 2:11 AM, Brad Campbell <brad@...p.net.au> wrote:
> Luca Tettamanti wrote:
>> On Sun, Sep 20, 2009 at 10:20 AM, wixor <wixorpeek@...il.com> wrote:
>>> I have also discovered that dsdt contains description of what is
>>> connected to each it87 input. Maybe it has also some code to access
>>> the chip? In /proc/acpi I can read only one temperature, while the
>>> chip measures three temperatures, fan speeds and voltages. This is
>>> desktop pc with ASUS A8N1-E maniboard, athlon64 and nforce4 chipset.
>>
>> Try the asus_atk0110 driver, it handles the ACPI hwmon interface on
>> Asus motherboards. If it does not work then please send a dump of your
>> DSDT (/sys/firmware/acpi/tables/DSDT).
>
> Vanilla Kernel 2.6.31.1 fails to load it87 on my machine with the same
> messages as posted above.
>
> [71916.534278] it87: Found IT8716F chip at 0x290, revision 0
> [71916.535783] it87: in3 is VCC (+5V)
> [71916.537239] it87: in7 is VCCH (+5V Stand-By)
> [71916.538763] ACPI: I/O resource it87 [0x295-0x296] conflicts with ACPI
> region IP__ [0x295-0x296]
> [71916.540365] ACPI: Device needs an ACPI driver
>
> In addition, asus_atk0110 loads but leaves no trace in dmesg when loaded.

That's good ;-) The driver is quiet when everything is ok. You should
see the corresponding entries under /sys/class/hwmon/hwmonN; upgrade
lm-sensor package to version 3.1.1, older versions do not support ACPI
devices.

> Motherboard is an Asus M2N32-WS. DSDT attached.

>From a quick glance it should work. If it doesn't enable
CONFIG_HWMON_DEBUG_CHIP.

Luca
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