CPUFreq HAL [PSARC/2007/679 FastTrack timeout 12/12/2007]

[David Chieu]

Artem,

HAL spec is placed at:
http://sac.eng/arc/PSARC/2007/679/materials/hal-spec.html
as well.

-- David Chieu

Anup Pemmaiah wrote:
> Artem Kachitchkine wrote:
>>
>>>> What happens when CPUs are DR removed/added ?
>>> The associated device objects should get removed.
>>
>> Will that be achieved via DR sysevents or some other mechanism?
>>
>>> The CPUFreq interface is associated with the "computer" device 
>>> object, similar to system power management interface. Since it is 
>>> global there will be just one method call.
>>
>> OK, so based on our little q&a, things missing from the interface table:
>>
>> - DBus interface name (org.freedesktop.Hal.Device.CPUFreq?)
>> - DBus path of the objects that implement that interface 
>> (/org/freedesktop/Hal/devices/computer?)
>> - "processor" capability for processor objects
>> - I think also "cpufreq_control" capability for the computer object
> Have updated the psarc draft with the missing interfaces. I am pasting 
> below the additional interfaces added to the draft
>
> The processor specific properties interface
>  Interface        Type             Comments
>   ---------------------------------------------------------------
> info.capabilities    string list    value = "processor"
>
>
>    The computer device object specific properties interface. If the 
> property
>    already exists, then the following values will get appended
>
>   Interface        Type             Comments
>   ---------------------------------------------------------------
>   info.capabilities    string list    value = "cpufreq_control"
>   info.interfaces    string list    value = 
> "org.freedesktop.Hal.Device.CPUFreq"
>   info.addons        string list    value = "hald-addon-cpufreq"  
>   D-Bus specific Information
>   ---------------------------
>
>  Interface Name:        org.freedesktop.Hal.Device.CPUFreq
>            Path to device object        
> /org/freedesktop/Hal/devices/computer
>  that implements the
>  interface
>
> Interfaces Imported:
>
>   Interface                                                            
>    Comments
>   
> ----------------------------------------------------------------------------------------------------------- 
>
>  PM_GET_CPU_THRESHOLD       Used by GetCPUFreqPerformance to determine 
> the
>                                                              frequency 
> performance.
>      PM_GET_SYSTEM_THRESHOLD     Used by GetCPUFreqPerformance to 
> determine the
>                                                                      
> frequency performance.
>
>
>   PM_GET_CPUPM_STATE            Used by GetCPUFreqGovernor to 
> determine the
>                                                             current 
> system policy.
>
>   PM_GET_PM_STATE                    Used by GetCPUFreqGovernor to 
> determine the
>                                                             current 
> system policy.
>
>
> The new draft can be found at
> http://sac.eng/arc/PSARC/2007/679/materials/spec.v1.txt
>
> Thanks
> Anup
>>
>> Could you also place a copy of hal-spec.html in the case directory, 
>> because the one at freedesktop.org changes frequently.
>>
>> thanks,
>> -Artem
>