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    SubjectRe: APM_CONFIG on x86 - Is it possible?
    On Fri, 31 Dec 2010 21:28:00 +0200 Yotam Medini wrote:

    > Randy,
    >
    > Thanks for your quick reply.
    > Sorry, but the subject line should have been:
    > APM_POWER on x86 - Is it possible?

    Nope, not on X86.

    > 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.

    APM_POWER depends on APM_EMULATION, which is not available on X86.
    But real APM is available on X86, so why would you need APM_EMULATION
    instead of APM_FOR_REAL ?

    Enabling APM (according to its Kconfig help text) provides /proc/apm
    battery status information.


    > 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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    ---
    ~Randy
    *** Remember to use Documentation/SubmitChecklist when testing your code ***
    desserts: http://www.xenotime.net/linux/recipes/


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