Re: Report on ITE IT8728

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Hi Daniel,

On Tue, 07 Feb 2012 19:26:31 +0100, Daniel Glaser wrote:
> for the it8728 chipset you asked to provide feedback, if the command
> shown on your website works. It did, so here is the report.

Thanks for reporting.

> The sensors3.conf looks as follows (unmodified from installer):
> 
> chip "it87-*" "it8712-*" "it8716-*" "it8718-*" "it8720-*" "it8728-*"
> 
>     label in8 "Vbat"
> 

The "it8728-*" isn't in our copy of this file, and shouldn't be needed,
as the it87 driver exports labels as needed for IT8721F and newer chips.

> This is, what my console on ubuntu 11.10 gives:
> $ modprobe it87 force_id=0x8721
> $ sensors
> 
> it8721-isa-0290
> Adapter: ISA adapter
> in0:          +1.03 V  (min =  +0.00 V, max =  +3.06 V)
> in1:          +2.06 V  (min =  +0.00 V, max =  +3.06 V)
> in2:          +2.94 V  (min =  +0.00 V, max =  +3.06 V)
> in3:          +2.88 V  (min =  +0.00 V, max =  +3.06 V)
> in4:          +0.00 V  (min =  +0.00 V, max =  +3.06 V)  ALARM
> in5:          +0.78 V  (min =  +0.00 V, max =  +3.06 V)
> in6:          +1.51 V  (min =  +0.00 V, max =  +3.06 V)
> 3VSB:         +3.36 V  (min =  +0.00 V, max =  +6.12 V)
> Vbat:         +3.05 V
> fan1:        1092 RPM  (min =    0 RPM)
> fan2:        1049 RPM  (min =    0 RPM)
> fan3:           0 RPM  (min =    0 RPM)
> fan4:        1967 RPM  (min =    0 RPM)
> temp1:        +35.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
> temp2:        +25.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
> temp3:        +13.0°C  (low  = +127.0°C, high = +127.0°C)  sensor = thermistor
> 
> Voltages: seem to be a bit wrong

This is expected, voltages always need scaling for all inputs greater
than the ADC range (+3V in your case.) Finding the labels and scaling
factors can be tricky. In your case I would guess that in0 is Vcore and
in6 is Vdimm. in4 is obviously unused, and in2 probably as well (too
close to the ADC's max.) This leaves in1, in3 and in5 for +5V, +12V and
maybe Vtt, although in3 is a little high as well. If you want me to
help you figuring out the scaling factors, please check and report what
voltage values your BIOS is reporting (including oscillating values,
very useful).

> Fans: look quite nice (fan3 is not installed)

Indeed.

> Temperatures: temp1 and temp2 also look fine, but temp3 seems also to be
> a bit wrong.

Could simply be because temp3 is unused. I presume that your BIOS only
reports 2 temperature values?

> Hope this helps you to improve the support of this chip.

We still don't have a datasheet, so we assume that the IT8728F is
compatible with the IT8721F, and so far it seems to be the case.

> If you need anything else, I've NOT subscribed to the list, so please
> take me on CC.
> 
> Thanks a lot for your great work.

You're welcome :)

-- 
Jean Delvare

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