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path: root/drivers/leds/led-class.c
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* leds: allow led-drivers to use a variable range of brightness valuesGuennadi Liakhovetski2009-04-061-1/+20
| | | | | | | | | | This patch allows drivers to override the default maximum brightness value of 255. We take care to preserve backwards-compatibility as much as possible, so that user-space ABI doesn't change for existing drivers. LED trigger code has also been updated to use the per-LED maximum. Signed-off-by: Guennadi Liakhovetski <lg@denx.de> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* leds: Add suspend/resume to the core classRichard Purdie2009-01-081-0/+22
| | | | | | | Add suspend/resume to the core class and remove all the now unneeded code from various drivers. Originally the class code couldn't support suspend/resume but since class_device can there is no reason for each driver doing its own suspend/resume anymore.
* leds: Fixup kdoc comment to match parameter namesSven Wegener2009-01-081-1/+1
| | | | | Signed-off-by: Sven Wegener <sven.wegener@stealer.net> Signed-off-by: Richard Purdie <rpurdie@intel.linux.com>
* leds: Fix trigger registration raceRichard Purdie2008-10-201-2/+3
| | | | | | | Fix a race during trigger registration where we could try and use a lock before it was initialised. Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* leds: Fix leds-class.c commentQinghuang Feng2008-10-201-1/+1
| | | | | | | led_classdev_unregister() has no "__" prefix, remove it. Signed-off-by: Qinghuang Feng <qhfeng.kernel@gmail.com> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* leds: Remove uneeded strlen callsSven Wegener2008-10-201-4/+1
| | | | | | | | | | | There's no need for the additional call to strlen(), we can directly return the value returned by sprintf(). We now return a length value that doesn't include the final '\0', but user space shouldn't bother about it anyway. Signed-off-by: Sven Wegener <sven.wegener@stealer.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>
* device create: misc: convert device_create_drvdata to device_createGreg Kroah-Hartman2008-10-161-2/+2
| | | | | | | | Now that device_create() has been audited, rename things back to the original call to be sane. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* LEDS: fix race in device_createGreg Kroah-Hartman2008-05-201-4/+2
| | | | | | | | | | | | | | | There is a race from when a device is created with device_create() and then the drvdata is set with a call to dev_set_drvdata() in which a sysfs file could be open, yet the drvdata will be NULL, causing all sorts of bad things to happen. This patch fixes the problem by using the new function, device_create_drvdata(). Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* Remove duplicated unlikely() in IS_ERR()Hirofumi Nakagawa2008-04-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | Some drivers have duplicated unlikely() macros. IS_ERR() already has unlikely() in itself. This patch cleans up such pointless code. Signed-off-by: Hirofumi Nakagawa <hnakagawa@miraclelinux.com> Acked-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jeff@garzik.org> Cc: Paul Clements <paul.clements@steeleye.com> Cc: Richard Purdie <rpurdie@rpsys.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: Anton Altaparmakov <aia21@cantab.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Carsten Otte <cotte@de.ibm.com> Cc: Patrick McHardy <kaber@trash.net> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jaroslav Kysela <perex@perex.cz> Cc: Takashi Iwai <tiwai@suse.de> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* leds: Add support to leds with readable statusHenrique de Moraes Holschuh2008-04-241-0/+9
| | | | | | | | | | | | | | | | | Some led hardware allows drivers to query the led state, and this patch adds a hook to let the led class take advantage of that information when available. Without this functionality, when access to the led hardware is not exclusive (i.e. firmware or hardware might change its state behind the kernel's back), reality goes out of sync with the led class' idea of what the led is doing, which is annoying at best. Behaviour for drivers that do not or cannot read the led status is unchanged. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
* leds: disable triggers on brightness setNémeth Márton2008-04-241-0/+3
| | | | | | | | | Disable any active triggers when the brightness attribute is set to zero. Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br> Signed-off-by: Márton Németh <nm127@freemail.hu> Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
* PM: Remove destroy_suspended_device()Rafael J. Wysocki2008-04-191-8/+3
| | | | | | | | | | | | | | | | | | After 2.6.24 there was a plan to make the PM core acquire all device semaphores during a suspend/hibernation to protect itself from concurrent operations involving device objects. That proved to be too heavy-handed and we found a better way to achieve the goal, but before it happened, we had introduced the functions device_pm_schedule_removal() and destroy_suspended_device() to allow drivers to "safely" destroy a suspended device and we had adapted some drivers to use them. Now that these functions are no longer necessary, it seems reasonable to remove them and modify their users to use the normal device unregistration instead. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* leds: add possibility to remove leds classdevs during suspend/resumeRafael J. Wysocki2008-02-051-4/+9
| | | | | | | | | | | | | | | | | Make it possible to unregister a led classdev object in a safe way during a suspend/resume cycle. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Michael Buesch <mb@bu3sch.de> Cc: Pavel Machek <pavel@ucw.cz> Cc: "John W. Linville" <linville@tuxdriver.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Len Brown <lenb@kernel.org> Cc: Greg KH <greg@kroah.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* leds: Fix leds_list_lock locking issuesRichard Purdie2007-12-311-4/+4
| | | | | | | Covert leds_list_lock to a rw_sempahore to match previous LED trigger locking fixes, fixing lock ordering. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
* leds: Fix led trigger locking bugsRichard Purdie2007-12-071-3/+3
| | | | | | | | Convert part of the led trigger core from rw spinlocks to rw semaphores. We're calling functions which can sleep from invalid contexts otherwise. Fixes bug #9264. Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
* leds: Convert from struct class_device to struct deviceRichard Purdie2007-07-161-27/+22
| | | | | | | | Convert the LEDs class from struct class_device to struct device since class_device is scheduled for removal. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
* [PATCH] drivers/led: handle sysfs errorsJeff Garzik2006-10-171-5/+21
| | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org> Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* kerneldoc-typo in led-class.cHenrik Kretzschmar2006-10-031-1/+1
| | | | | | | Fixes a typo in led-class.c kerneldoc. Signed-off-by: Henrik Kretzschmar <henne@nachtwindheim.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* Remove obsolete #include <linux/config.h>Jörn Engel2006-06-301-1/+0
| | | | | Signed-off-by: Jörn Engel <joern@wohnheim.fh-wedel.de> Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] LED: Fix sysfs store function error handlingRichard Purdie2006-05-151-2/+7
| | | | | | | | | | | Fix the error handling of some LED _store functions. This corrects them to return -EINVAL if the value is not numeric with an optional byte of trailing whitespace. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] LED: add LED trigger tupportRichard Purdie2006-03-311-0/+20
| | | | | | | | | | | | Add support for LED triggers to the LED subsystem. "Triggers" are events which change the state of an LED. Two kinds of trigger are available, simple ones which can be added to exising code with minimum disruption and complex ones for implementing new or more complex functionality. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* [PATCH] LED: add LED classRichard Purdie2006-03-311-0/+147
Add the foundations of a new LEDs subsystem. This patch adds a class which presents LED devices within sysfs and allows their brightness to be controlled. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Greg KH <greg@kroah.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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