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PCI devices power management, w/o sysfs? [Was: Re: Liunx power consumption on laptops ...]

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From: Richard Mittendorfer <delist@...>
To: linux-kernel <linux-kernel@...>
Subject: PCI devices power management, w/o sysfs? [Was: Re: Liunx power consumption on laptops ...]
Date: Wednesday, July 11, 2007 - 8:42 am

Greetings *!

I'm looking for a way to disable (PM low power mode) some devices I
rarely/never use on my laptop to save some more power. With 2.6.17,
IIRC, I was able to echo -n 2 > /sys/bus/pci/../power to put things
into low power mode. (I don't know if it ever worked, but at least it
looked like it did.)

..-2.6.22(-ck1) w/ CONFIG_PM_SYSFS_DEPRECATED doesn't let me change this
state. evident :) -----------------^^^^^^^^^^

Is there a proper way to do this (setpci, if I'd know the registers)?
Is it gone/going inside drivers (like USB_SUSPEND) and I don't have to
worry?

I currently don't load the modules in question - but I'm not sure if it
helps, as they might already be powered on by PCI initialization/BIOS
(/sys/bus/pci/../state cats "0").

THX, ritch
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Messages in current thread:
Liunx power consumption on laptops -- Enormous progress in t..., Arjan van de Ven, (Thu Jul 5, 3:58 pm)
PCI devices power management, w/o sysfs? [Was: Re: Liunx pow..., Richard Mittendorfer, (Wed Jul 11, 8:42 am)
Re: PCI devices power management, w/o sysfs? [Was: Re: Liunx..., Arjan van de Ven, (Wed Jul 11, 9:15 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Chuck Ebbert, (Fri Jul 6, 12:34 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Arjan van de Ven, (Fri Jul 6, 12:35 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Chuck Ebbert, (Fri Jul 6, 2:02 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Bill Davidsen, (Mon Jul 9, 1:55 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Pavel Machek, (Tue Jul 10, 2:59 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Dave Jones, (Fri Jul 6, 1:02 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., , (Mon Jul 9, 5:42 pm)
Re: Liunx power consumption on laptops -- Enormous progress ..., Dave Jones, (Mon Jul 9, 5:46 pm)