> -----Original Message----- > From: linux-acpi-owner@xxxxxxxxxxxxxxx [mailto:linux-acpi- > owner@xxxxxxxxxxxxxxx] On Behalf Of Rafael J. Wysocki > Sent: Thursday, May 03, 2007 1:02 PM > To: ACPI Devel Maling List > Cc: pm list; Pavel Machek > Subject: Why don't we use _TTS method? > > Hi, > > I've got two questions regarding the implementation of the ACPI > poweroff/sleep > code in drivers/acpi/sleep and drivers/acpi/hardware . > > 1) We don't seem to use the _TTS system-control method, although the ACPI > specification (ACPI 3.0b) says that this method should be used for > intiating > and finishing power transitions. Could you please tell me why we don't > use it? > [Moore, Robert] Probably because it's fairly new and it takes a long time for these things to appear in real machines. Also, needs to be supported in Windows before we ever see it in real machines. > 2) In the functions acpi_enter_sleep_state_prep(), > acpi_enter_sleep_state(), > acpi_leave_sleep_state() we manipulate GPEs quite extensively (we disable > and enable them for a couple of times during a transition), although the > specification doesn't tell anything about that explicitly. Could you > please > explain to me what the purpose of that is? > [Moore, Robert] There a wake GPEs and runtime GPEs that need to be managed separately. We want to make sure that only the "Wake" GPEs are enabled as we goto sleep. Bob > Greetings, > Rafael > > > -- > If you don't have the time to read, > you don't have the time or the tools to write. > - Stephen King > - > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
