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Date: Fri, 31 Dec 2010 11:39:54 -0800 From: Randy Dunlap <rdunlap@...otime.net> To: yotam.medini@...il.com Cc: linux-kernel@...r.kernel.org Subject: Re: 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@...otime.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/ > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ --- ~Randy *** Remember to use Documentation/SubmitChecklist when testing your code *** desserts: http://www.xenotime.net/linux/recipes/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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