Hi Tarek,

On Tue, 2009-12-01 at 12:42 +0100, ext tarek attia wrote:
> Hi Ameya,
> 
> I believe ACPI is a standard that doesn't matter it's X86 or ARM ,and
> it's responsible for power states (S,C,D and P states) ,,and Linux
> kernel implemented this standard .
> 
> Am I right ??

You are absolutely right :) It is a specification which can be
implemented by a hardware. I think the hardware which supports ACPI is
mostly i386, x86_64, and ia64.

Also you can see that from drivers/acpi/Kconfig that linux acpi depends
on above mentioned hardware.

#
# ACPI Configuration
#

menuconfig ACPI
        bool "ACPI (Advanced Configuration and Power Interface) Support"
        depends on !IA64_HP_SIM
        depends on IA64 || X86
        depends on PCI
        depends on PM

> BTW :- if it's not like so,,How can I monitor the power changes on the
> peripherals like LCD connected to my beagleboard ??
> 
> How can I make the power management  for the peripherals ??

I am not an expert in PM area. But may be this will be helpful:
http://elinux.org/OMAP_Power_Management

Cheers,
Ameya.

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