From mboxrd@z Thu Jan 1 00:00:00 1970 From: Matthew Percival Subject: Powering down a device... Date: Mon, 21 Nov 2005 09:44:45 +1100 Message-ID: <1132526685.8816.19.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============89944817121302445==" Return-path: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.osdl.org Errors-To: linux-pm-bounces@lists.osdl.org To: linux-pm@lists.osdl.org List-Id: linux-pm@vger.kernel.org --===============89944817121302445== Content-Type: text/plain Content-Transfer-Encoding: 7bit G'Day, I was directed here from the linux-omap-open-source mailing list. I am using an OMAP5912, and have been looking at what power savings I get when using Deep Sleep (echo -n "standby" > /sys/power/state), and noticed that there is no change in vmain. I am hoping that turning the Ethernet controller off before entering deep sleep will make a significant difference, but I do not know how to do this. If I look in drivers/net/smc91x.c, there is already a suspend function written, which apparently powers the device down. I do not believe this is currently being used anywhere, and I am not sure how exactly it is supposed to be used to begin with. I was hoping that someone here would be able to give me some information on using device_driver->suspend() functions. As an aside, is there anyone here who knows how to use Big Sleep in an OMAP environment? I have worked out how to configure it, but not how to enter it. As this is not an OMAP mailing list, I am not expecting anyone here to know the answer to that one, but it cannot hurt to ask. Thanks for your time, Matthew --===============89944817121302445== Content-Type: text/plain; charset="iso-8859-1" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline --===============89944817121302445==--