Re: New ACPI power resource code for testing

[Paul Goyette <paul%whooppee.com@localhost>]

On Mon, 8 Mar 2010, Masao Uebayashi wrote:

> Is it possible to call functions via function pointers put in the common
> parent (acpi.c)?  acpi_power implements the "power" interface in the acpi
> driver.  acpi_power_attach() just needs to assign the parent's pointer (to
> array of power ops) with its implementation.

The problem I have with the currently-proposed code is that there is 
some initialization code in acpi_power that MUST be called, whether or 
not there are any consumer devices of the acpi_power service.  This is 
required, even if there are no acpi_power "devices".  Using function 
pointers would not help;  you would still have to include the acpi_power 
code to resolve the pointers.

> Personally I want to keep device tree structure to reflect its physical
> representation naturally.  It'd be nice if acpi drivers follow an intuitive
> rule which helps people *guess* ACPI's internal by its topology.

I suspect that this is probably an unattainable goal, from what little I 
understand about ACPI.  :)


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