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Date: Thu, 2 Jun 2011 09:29:35 +0200 (CEST) From: Guennadi Liakhovetski <g.liakhovetski@....de> To: "Rafael J. Wysocki" <rjw@...k.pl> cc: Linux PM mailing list <linux-pm@...ts.linux-foundation.org>, Greg KH <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>, Kevin Hilman <khilman@...com>, Grant Likely <grant.likely@...retlab.ca>, Magnus Damm <magnus.damm@...il.com>, linux-sh@...r.kernel.org, MyungJoo Ham <myungjoo.ham@...il.com>, Alan Stern <stern@...land.harvard.edu> Subject: Re: [PATCH 1/5] PM / Runtime: Support for generic I/O power domains (v4) On Sat, 28 May 2011, Rafael J. Wysocki wrote: > From: Rafael J. Wysocki <rjw@...k.pl> > > Introduce common headers, helper functions and callbacks allowing > platforms to use simple generic power domains for runtime power > management. > > Introduce struct generic_power_domain to be used for representing > power domains that each contain a number of devices and may be > master domains or subdomains with respect to other power domains. > Among other things, this structure includes callbacks to be > provided by platforms for performing specific tasks related to > power management (i.e. ->stop_device() may disable a device's > clocks, while ->start_device() may enable them, ->power_off() is > supposed to remove power from the entire power domain > and ->power_on() is supposed to restore it). I've got a generic question to this: do we have any examples of power-domain specific ->start_device() and ->stop_device() callbacks? A common case is, when these callbacks start and stop clocks, associated with the device, but this is not power-domain specific, right? Do we have any examples of different power domains in a system, having different these calbacks, but all devices in one power-domain, having the same ones? Thanks Guennadi --- Guennadi Liakhovetski, Ph.D. Freelance Open-Source Software Developer http://www.open-technology.de/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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