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SubjectRe: APM_CONFIG on x86 - Is it possible?
Randy,

Thanks for your quick reply.
Sorry, but the subject line should have been:
APM_POWER on x86 - Is it possible?
I do get
CONFIG_APM=m
in the .config, but I am trying to get
CONFIG_APM_POWER=m
as well. So far, I do not see how.

regards -- yotam

On Fri, 31 Dec 2010 10:33:45 -0800
Randy Dunlap <rdunlap@xenotime.net> wrote:

> On Fri, 31 Dec 2010 19:38:58 +0200 Yotam Medini wrote:
>
> > Hello,
> >
> > To an ancient target (my UMAX 530T ActionBook - plz don't laugh...)
> > I am trying to build a lean kernel based on 2.6.32.24 (~ Ubuntu 10.04).
> > Battery monitoring used to be based on /proc/apm.
> > I believe ACPI is not supported on this old notebook.
> > Now, it seems that CONFIG_APM_POWER cannot be set, since:
> >
> > 1. The configuration place for APM_POWER is in:
> > ./drivers/power/Kconfig:25:
> > config APM_POWER
> > tristate "APM emulation for class batteries"
> > depends on APM_EMULATION
> >
> > 2. The configuration place for APM_EMULATION is in:
> > ./kernel/power/Kconfig:201:
> > config APM_EMULATION
> > tristate "Advanced Power Management Emulation"
> > depends on PM && SYS_SUPPORTS_APM_EMULATION
> >
> > 3. But the configuration places for the latter -
> > SYS_SUPPORTS_APM_EMULATION
> > - exists only in:
> > ./arch/powerpc/Kconfig:185:config SYS_SUPPORTS_APM_EMULATION
> > ./arch/sh/Kconfig:120:config SYS_SUPPORTS_APM_EMULATION
> > ./arch/mips/Kconfig:896:config SYS_SUPPORTS_APM_EMULATION
> > ./arch/arm/Kconfig:32:config SYS_SUPPORTS_APM_EMULATION
> > and none under arch/x86 ! :():
> >
> > So my bottom line questions are:
> > + Am I missing something?
> > + What is the 'right way' to configure a 2.6.3m.nn kernel
> > that should support battery monitoring on such ancient laptops.
> >
> > When replying, please CC: yotam DOT medini AT Gmail DOT c0m
> > regards -- yotam
> > --
>
>
> arch/x86/Kconfig has the kconfig symbol "APM":
>
> menuconfig APM
> tristate "APM (Advanced Power Management) BIOS support"
> depends on X86_32 && PM_SLEEP
> => /proc/apm for battery status information
>
> so as long as your target system is 32-bit X86, you should be OK.
>
> PM_SLEEP depends on SUSPEND || HIBERNATION. PM needs to be enabled,
> and SWAP has to be enabled for HIBERNATION.
>
> ---
> ~Randy
> *** Remember to use Documentation/SubmitChecklist when testing your code ***
> desserts: http://www.xenotime.net/linux/recipes/


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