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authorRafael J. Wysocki <rjw@sisk.pl>2007-05-08 00:24:07 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:14:59 -0700
commit5b7952021289b6d04d8c62c0f13acce570730dcd (patch)
tree57bb1363826b41bb2809a0a980f2bf78555bbf73 /Documentation/SubmittingDrivers
parent8e2c20023f34b652605a5fb7c68bb843d2b100a8 (diff)
downloadlinux-linaro-stable-5b7952021289b6d04d8c62c0f13acce570730dcd.tar.gz
Documentation: Ask driver writers to provide PM support
Add a paragraph in Documentation/SubmittingDrivers requesting that the basic PM support be provided by new device drivers. Add two new documents in Documentation/power/ giving general instructions on debugging the suspend/resume functionality and testing the suspend and resume support in device drivers. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: David Brownell <david-b@pacbell.net> Cc: Nigel Cunningham <ncunningham@linuxmail.org> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/SubmittingDrivers')
-rw-r--r--Documentation/SubmittingDrivers15
1 files changed, 15 insertions, 0 deletions
diff --git a/Documentation/SubmittingDrivers b/Documentation/SubmittingDrivers
index 58bead05eabb..d7e26427e426 100644
--- a/Documentation/SubmittingDrivers
+++ b/Documentation/SubmittingDrivers
@@ -87,6 +87,21 @@ Clarity: It helps if anyone can see how to fix the driver. It helps
driver that intentionally obfuscates how the hardware works
it will go in the bitbucket.
+PM support: Since Linux is used on many portable and desktop systems, your
+ driver is likely to be used on such a system and therefore it
+ should support basic power management by implementing, if
+ necessary, the .suspend and .resume methods used during the
+ system-wide suspend and resume transitions. You should verify
+ that your driver correctly handles the suspend and resume, but
+ if you are unable to ensure that, please at least define the
+ .suspend method returning the -ENOSYS ("Function not
+ implemented") error. You should also try to make sure that your
+ driver uses as little power as possible when it's not doing
+ anything. For the driver testing instructions see
+ Documentation/power/drivers-testing.txt and for a relatively
+ complete overview of the power management issues related to
+ drivers see Documentation/power/devices.txt .
+
Control: In general if there is active maintainance of a driver by
the author then patches will be redirected to them unless
they are totally obvious and without need of checking.