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ACPI support for add-on devices driver

DISCUSSION siva 3 participants 3 messages Feb 6, 2003 1 message not in the archive ACPI

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siva

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#0 lore raw

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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#2 lore raw
Quoted 8 lines · siva

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.

Quoted 5 lines

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.).

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#3 lore raw
In reply to a message not in the archive
Quoted 5 lines · siva

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.

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