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Date:      Thu, 7 Jul 2016 12:33:33 +0300
From:      Andriy Gapon <avg@FreeBSD.org>
To:        John Baldwin <jhb@FreeBSD.org>, freebsd-acpi@FreeBSD.org, SERGEY <okunev.s.a@gmail.com>
Subject:   Re: no fan and temperature info
Message-ID:  <52f7a414-1bef-7430-52e1-732138141be1@FreeBSD.org>
In-Reply-To: <5416462.zg49n8S1BL@ralph.baldwin.cx>
References:  <CAAFB1Y8MPoG6cRgH9t6DZJCJPHkos_0pNbyb_DbZvFf69cHEtw@mail.gmail.com> <5416462.zg49n8S1BL@ralph.baldwin.cx>

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On 24/06/2016 23:44, John Baldwin wrote:
> On Thursday, December 17, 2015 01:42:20 AM SERGEY wrote:
>> Hi
>> Please help me. I can not view information about the temperature of the
>> motherboard and fan speed.
>> uname -a
>> FreeBSD bsd 10.2-RELEASE-p7 FreeBSD 10.2-RELEASE-p7 #0: Mon Nov  2 14:19:39
>> UTC 2015     root@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC
>>  amd64
>>
>> Motherboard: Gigabyte GA-970A-UD3P rev.1
>> control chip: ITE IT8728F
>>
>> pciconf -lv | grep -A4 none
>> none0@pci0:0:20:0:    class=0x0c0500 card=0x43851002 chip=0x43851002
>> rev=0x42 hdr=0x00
>>     vendor     = 'Advanced Micro Devices [AMD] nee ATI'
>>     device     = 'SBx00 SMBus Controller'
>>     class      = serial bus
>>     subclass   = SMBus
>>
>> mbmon -d -I -p it87
>> No ISA-IO HWM available!!
>> InitMBInfo: No such file or directory
> 
> You need an smb device driver for this controller.  The intpm(4) driver
> only handles devices with revisions < 0x40 (yours is 0x42).
> 

That's correct.
But even if intpm supported the chipset it's not guaranteed that the HWM
chip is exposed via SMBus.
I haven't used mbmon in a while, maybe there is a way to ask it to try
using a different address for LPC (ISA) IO access method.  The address
could be discovered using superiotool (from ports) and the chip's
documentation.
However, I am not confident that mbmon knows enough about that specific
chip (IT8728F).

-- 
Andriy Gapon



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