Re: [asus-nb-wmi] thermal device detected by asus-nb-wmi platform driver

["Lu, Baolu" <baolu.lu@linux.intel.com>]

On 2014/3/24 12:15, Guenter Roeck wrote:
> On 03/20/2014 05:22 PM, Lu, Baolu wrote:
>> Hi,
>>
>> I booted Ubuntu13.10 onto ASUS T100 Tablet and upgraded it with upstream
>> kernel (3.14.0-rc7+). There is a thermal device under
>> /sys/devices/platform/asus-nb-wmi.
>>
>> root@t100:~/linux# tree /sys/class/hwmon/
>> /sys/class/hwmon/
>> ├── hwmon0 -> ../../devices/platform/coretemp.0/hwmon/hwmon0
>> └── hwmon1 -> ../../devices/platform/asus-nb-wmi/hwmon/hwmon1
>>
>> root@t100:/sys/devices/platform/asus-nb-wmi# ls
>> cpufv driver hwmon input modalias power subsystem uevent
>>
>> root@t100:~/linux# sensors
>> coretemp-isa-0000
>> Adapter: ISA adapter
>> Core 0: +38.0°C (high = +90.0°C, crit = +90.0°C)
>> Core 1: +38.0°C (high = +90.0°C, crit = +90.0°C)
>> Core 2: +39.0°C (high = +90.0°C, crit = +90.0°C)
>> Core 3: +38.0°C (high = +90.0°C, crit = +90.0°C)
>>
>> asus-isa-0000
>> Adapter: ISA adapter
>> temp1: +6280.0°C
>>
>
> Pretty hot ;-). Not your problem, though - it looks like the temperature
> is reported in Kelvin and the code converting from Kelvin to degrees C
> turns out to be buggy.
>
>> I didn't get any information about thermal interface in
>> "Documentation/ABI/testing/sysfs-platform-asus-wmi". Is this a thermal
>> sensor? If it's the fact, how can I change the environment so that this
>> sensor gives me variable data?
>>
>
> I don't think I understand your question. Yes, this is a thermal sensor.
> What is it you want to do (in addition to having it report reasonable
> temperatures) ?
>
> Guenter

Sorry for the confusing question. I'd like to verify whether this sensor 
works. What I want to do is to make some changes so that the sensor 
could give me a different temperature value other than always +6280.0°. 
I have no idea about what kind of changes should I make.

For example, when I work with thermal sensors in CPU core. I can see 
different temperature values at different core states (idle and busy).

[system idle]

root@t100:~# sensors

asus-isa-0000

Adapter: ISA adapter

temp1: +6280.0°C

coretemp-isa-0000

Adapter: ISA adapter

Core 0: +39.0°C  (high = +90.0°C, crit = +90.0°C)

Core 1: +39.0°C  (high = +90.0°C, crit = +90.0°C)

Core 2: +39.0°C  (high = +90.0°C, crit = +90.0°C)

Core 3: +39.0°C  (high = +90.0°C, crit = +90.0°C)

[system busy]

root@t100:~# sensors

asus-isa-0000

Adapter: ISA adapter

temp1: +6280.0°C

coretemp-isa-0000

Adapter: ISA adapter

Core 0: +45.0°C  (high = +90.0°C, crit = +90.0°C)

Core 1: +45.0°C  (high = +90.0°C, crit = +90.0°C)

Core 2: +46.0°C  (high = +90.0°C, crit = +90.0°C)

Core 3: +46.0°C  (high = +90.0°C, crit = +90.0°C)



Thanks,
baolu
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