From: David Brownell <david-b@pacbell.net>
To: linux-pm@lists.linux-foundation.org
Cc: Johannes Berg <johannes@sipsolutions.net>, Pavel Machek <pavel@ucw.cz>
Subject: Re: [PATCH v4] pm_ops: add system quiesce/activate hooks
Date: Sat, 14 Apr 2007 15:10:23 -0700 [thread overview]
Message-ID: <200704141510.24254.david-b@pacbell.net> (raw)
In-Reply-To: <1176503006.5764.105.camel@localhost.localdomain>
On Friday 13 April 2007 3:23 pm, Benjamin Herrenschmidt wrote:
>
> > We have "drivers" for few chips every PC has, like i8259 timer,
> > interrupt controller, APIC, etc. Sysdevs and platform devices are
> > designed for hardware like that.
> >
> > If you want to have a rule "platform device is not supposed to rely on
> > timers still working", I think you can get that. Such low-level
> > devices should really use udelay()/mdelay() that spins and does not
> > need timer hw.
>
> That's nonsense.
Agreed. Platform devices are the *primary* device types on
most embedded systems. Their suspend() and resume() methods
are allowed to use timers and sleep() just like they are with
any other bus type.
We do know that timers aren't available during the suspend_late()
and resume_early() calls, for any bus type.
next prev parent reply other threads:[~2007-04-14 22:10 UTC|newest]
Thread overview: 90+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-05 21:54 [PATCH] pm_ops: add irq enable/disable hooks Johannes Berg
2007-04-05 23:30 ` Rafael J. Wysocki
2007-04-05 23:28 ` Johannes Berg
2007-04-06 0:02 ` Rafael J. Wysocki
2007-04-06 0:09 ` Johannes Berg
2007-04-06 0:17 ` Rafael J. Wysocki
2007-04-06 8:48 ` Johannes Berg
2007-04-06 9:41 ` Rafael J. Wysocki
2007-04-06 9:44 ` Johannes Berg
2007-04-06 10:02 ` Rafael J. Wysocki
2007-04-06 10:00 ` Johannes Berg
2007-04-06 19:19 ` Pavel Machek
2007-04-06 21:59 ` Johannes Berg
2007-04-10 11:36 ` Pavel Machek
2007-04-10 11:45 ` Johannes Berg
2007-04-10 12:00 ` Pavel Machek
2007-04-10 13:42 ` Johannes Berg
2007-04-11 11:22 ` Benjamin Herrenschmidt
2007-04-11 14:07 ` Alan Stern
2007-04-11 16:39 ` Johannes Berg
2007-04-11 21:40 ` Benjamin Herrenschmidt
2007-04-11 11:15 ` Johannes Berg
2007-04-06 19:16 ` Pavel Machek
2007-04-11 15:54 ` [PATCH v2] pm_ops: add system quiesce/activate hooks Johannes Berg
2007-04-11 20:47 ` Dmitry Krivoschekov
2007-04-12 8:39 ` Johannes Berg
2007-04-12 8:42 ` Benjamin Herrenschmidt
2007-04-12 10:16 ` Pavel Machek
2007-04-12 10:45 ` Rafael J. Wysocki
2007-04-12 10:47 ` Johannes Berg
2007-04-13 21:00 ` Pavel Machek
2007-04-13 21:11 ` Paul Mackerras
2007-04-13 21:11 ` Johannes Berg
2007-04-13 21:43 ` Pavel Machek
2007-04-13 21:15 ` Benjamin Herrenschmidt
2007-04-12 11:23 ` Benjamin Herrenschmidt
2007-04-12 15:03 ` Rafael J. Wysocki
2007-04-12 16:32 ` David Brownell
2007-04-13 6:52 ` Johannes Berg
2007-04-13 7:59 ` [PATCH v3] " Johannes Berg
2007-04-12 17:36 ` [PATCH v2] " Dmitry Krivoschekov
2007-04-12 20:51 ` Benjamin Herrenschmidt
2007-04-13 6:54 ` Johannes Berg
2007-04-13 8:04 ` David Brownell
2007-04-13 8:59 ` Johannes Berg
2007-04-13 9:07 ` Benjamin Herrenschmidt
2007-04-13 11:47 ` Rafael J. Wysocki
2007-04-13 12:58 ` Johannes Berg
2007-04-13 13:26 ` [PATCH v4] " Johannes Berg
2007-04-13 20:43 ` Rafael J. Wysocki
2007-04-13 20:58 ` Pavel Machek
2007-04-13 21:06 ` Johannes Berg
2007-04-13 21:12 ` Pavel Machek
2007-04-13 21:18 ` Johannes Berg
2007-04-13 21:33 ` Pavel Machek
2007-04-13 21:45 ` Johannes Berg
2007-04-13 21:52 ` Pavel Machek
2007-04-13 21:59 ` Johannes Berg
2007-04-13 22:18 ` Rafael J. Wysocki
2007-04-13 22:20 ` Johannes Berg
2007-04-13 22:49 ` Rafael J. Wysocki
2007-04-13 22:55 ` Johannes Berg
2007-04-13 22:09 ` Rafael J. Wysocki
2007-04-13 22:13 ` Johannes Berg
2007-04-13 22:16 ` Pavel Machek
2007-04-14 16:55 ` Paul Mackerras
2007-04-13 22:25 ` Benjamin Herrenschmidt
2007-04-13 22:39 ` Pavel Machek
2007-04-13 23:19 ` Benjamin Herrenschmidt
2007-04-14 9:14 ` Rafael J. Wysocki
2007-04-14 9:19 ` Johannes Berg
2007-04-15 0:19 ` Benjamin Herrenschmidt
2007-04-16 7:32 ` Pavel Machek
2007-04-16 8:37 ` Johannes Berg
2007-04-16 12:47 ` Pavel Machek
2007-04-17 4:58 ` Paul Mackerras
2007-04-18 7:50 ` Benjamin Herrenschmidt
2007-04-13 22:47 ` Rafael J. Wysocki
2007-04-13 21:18 ` Benjamin Herrenschmidt
2007-04-13 21:56 ` Pavel Machek
2007-04-13 22:01 ` Johannes Berg
2007-04-13 22:24 ` Benjamin Herrenschmidt
2007-04-13 21:15 ` Benjamin Herrenschmidt
2007-04-13 21:50 ` Pavel Machek
2007-04-13 22:23 ` Benjamin Herrenschmidt
2007-04-14 22:10 ` David Brownell [this message]
2007-04-13 21:05 ` [PATCH v2] " Pavel Machek
2007-04-12 8:44 ` Benjamin Herrenschmidt
2007-04-17 17:18 ` [PATCH] s2ram: add arch irq disable/enable hooks Johannes Berg
2007-04-18 11:27 ` Pavel Machek
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