ACPI support for add-on devices driver

ACPI support for add-on devices driver

[siva]

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Hi all,

I like know what I need to do if I want to have ACPI power management 
support in my driver for an add-on device. When I am browsing APM 
implementation, I found that Linux kernel have general PM Interfaces 
like pm_regsiter and pm_unregsiter. In APM driver, pm_send is being 
called to send notification to all registered add-on devices.

In the case of ACPI, we have Device power state D0,D1,D2,D3. I like to 
know how the interface between the ACPI driver, PM interface and ADD-ON Driver happens.
Can any one please send me some details about it?

Thanks,
Siva







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Re: ACPI support for add-on devices driver

[Ducrot Bruno]

On Thu, Feb 06, 2003 at 10:46:19AM +0530, siva wrote:
> Hi all,
> 
> I like know what I need to do if I want to have ACPI power management 
> support in my driver for an add-on device. When I am browsing APM 
> implementation, I found that Linux kernel have general PM Interfaces 
> like pm_regsiter and pm_unregsiter. In APM driver, pm_send is being 
> called to send notification to all registered add-on devices.
> 
> In the case of ACPI, we have Device power state D0,D1,D2,D3. I like to 
> know how the interface between the ACPI driver, PM interface and ADD-ON 
> Driver happens.
> Can any one please send me some details about it?
> 

This is one of the main issue actually which is supposed to be somehow resolved
in 2.5 with the 'new device driver model' (and still have to be correctly
implemented, discuted, probably some flame war to come, etc.).

-- 
Ducrot Bruno

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.


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Re: ACPI support for add-on devices driver

[Matthew Wilcox]

On Thu, Feb 06, 2003 at 10:46:19AM +0530, siva wrote:
> I like know what I need to do if I want to have ACPI power management 
> support in my driver for an add-on device. When I am browsing APM 
> implementation, I found that Linux kernel have general PM Interfaces 
> like pm_regsiter and pm_unregsiter. In APM driver, pm_send is being 
> called to send notification to all registered add-on devices.

Presumably you're talking about a PCI device?  If so, you should implement the
`new-style' PCI driver interface (Documentation/pci.txt), and provide
implementations for ->suspend, ->resume and ->save_state.  Also see
Documentation/power/pci.txt.

-- 
"It's not Hollywood.  War is real, war is primarily not about defeat or
victory, it is about death.  I've seen thousands and thousands of dead bodies.
Do you think I want to have an academic debate on this subject?" -- Robert Fisk


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