kernel-fxtec-pro1x/arch/arm/plat-s3c24xx
Johannes Berg fe0c935a6c rework pm_ops pm_disk_mode, kill misuse
This patch series cleans up some misconceptions about pm_ops.  Some users of
the pm_ops structure attempt to use it to stop the user from entering suspend
to disk, this, however, is not possible since the user can always use
"shutdown" in /sys/power/disk and then the pm_ops are never invoked.  Also,
platforms that don't support suspend to disk simply should not allow
configuring SOFTWARE_SUSPEND (read the help text on it, it only selects
suspend to disk and nothing else, all the other stuff depends on PM).

The pm_ops structure is actually intended to provide a way to enter
platform-defined sleep states (currently supported states are "standby" and
"mem" (suspend to ram)) and additionally (if SOFTWARE_SUSPEND is configured)
allows a platform to support a platform specific way to enter low-power mode
once everything has been saved to disk.  This is currently only used by ACPI
(S4).

This patch:

The pm_ops.pm_disk_mode is used in totally bogus ways since nobody really
seems to understand what it actually does.

This patch clarifies the pm_disk_mode description.

It also removes all the arm and sh users that think they can veto suspend to
disk via pm_ops; not so since the user can always do echo shutdown >
/sys/power/disk, they need to find a better way involving Kconfig or such.

ACPI is the only user left with a non-zero pm_disk_mode.

The patch also sets the default mode to shutdown again, but when a new pm_ops
is registered its pm_disk_mode is selected as default, that way the default
stays for ACPI where it is apparently required.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: David Brownell <david-b@pacbell.net>
Acked-by: Pavel Machek <pavel@ucw.cz>
Cc: <linux-pm@lists.linux-foundation.org>
Cc: Len Brown <lenb@kernel.org>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Greg KH <greg@kroah.com>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Acked-by: Paul Mundt <lethal@linux-sh.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-04-30 16:40:40 -07:00
..
clock.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
common-smdk.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
cpu.c [ARM] 4198/2: S3C2443: arch/arm/mach-s3c2443 and related support 2007-02-16 11:13:37 +00:00
devs.c [ARM] 4173/1: S3C24XX usb device platform datas 2007-02-14 15:04:13 +00:00
dma.c [ARM] 4220/1: S3C24XX: DMA system initialised from sysdev 2007-02-17 15:00:34 +00:00
gpio.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
irq.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
Kconfig [ARM] 4239/1: S3C24XX: Update kconfig entries for PM 2007-03-02 11:58:58 +00:00
Makefile [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
pm-simtec.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
pm.c rework pm_ops pm_disk_mode, kill misuse 2007-04-30 16:40:40 -07:00
s3c244x-irq.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
s3c244x.c [ARM] 4198/2: S3C2443: arch/arm/mach-s3c2443 and related support 2007-02-16 11:13:37 +00:00
s3c244x.h [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00
sleep.S [ARM] 4170/1: S3C2410: don't save and restore cp register 15 2007-02-12 20:58:07 +00:00
time.c [ARM] 4157/2: S3C24XX: move arch/arch/mach-s3c2410 into cpu components 2007-02-11 17:36:09 +00:00