Messages in this thread | | | Subject | RE: [ACPI] device states supported by current drivers | Date | Wed, 13 Aug 2003 11:07:35 +0800 | From | "Yu, Luming" <> |
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I think device states will not be supported in 2.4 kernel, And It could be found in 2.6 kernel. Who know the current status? Thanks, Luming
-----Original Message----- From: Pavel Machek [mailto:pavel@ucw.cz] Sent: 2003?8?13? 6:58 To: Bharata B Rao Cc: Knut Neumann; acpi-devel@lists.sourceforge.net Subject: Re: [ACPI] device states supported by current drivers
Hi!
> >Am Mo, 2003-08-11 um 03.28 schrieb Bharata B Rao: > >> > >>Are there any device drivers in 2.4/2.6 kernels which actually support > >>different low power states as defined by ACPI ? The reason I ask is I > >>can't really see any device actually implementing the new driver model > >>suspend routine which is used by ACPI. > > > > > >What about the e100 driver? See drivers/net/e100/e100_main.c > > > > Ok, I can see that now. Thanks. > > Two more dumb questions (sorry for asking them here in devel list) > > 1. When a particular sleep state (S1 - S5) is entered via > /proc/acpi/sleep, the devices are put to one of the D states (D0 - D3) > From the code (device_suspend, e100_suspend, pci_set_power_state), it > looks like the sleep states (Sx) are directly translated to device > states (Dx) when it comes to device suspend. i,e., when I say enter S2, > it will lead to device entering to D2. Is this how it should be ?
I believe suspend() function parameters are expected to tell you *S* state we are entering. I do not see code that enables drivers to enter D0 vs. D1 vs. D2 vs D3. I guess it is not there.
Pavel -- When do you have a heart between your knees? [Johanka's followup: and *two* hearts?]
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