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: NGuennadi Liakhovetski <lg@denx.de>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Add bindings to support LEDs defined as of_platform devices in addition to
the existing bindings for platform devices.

New options in Kconfig allow the platform binding code and/or the
of_platform code to be turned on.  The of_platform code is of course only
available on archs that have OF support.

The existing probe and remove methods are refactored to use new functions
create_gpio_led(), to create and register one led, and delete_gpio_led(),
to unregister and free one led.  The new probe and remove methods for the
of_platform driver can then share most of the common probe and remove code
with the platform driver.

The suspend and resume methods aren't shared, but they are very short.  The
actual led driving code is the same for LEDs created by either binding.

The OF bindings are based on patch by Anton Vorontsov
<avorontsov@ru.mvista.com>.  They have been extended to allow multiple LEDs
per device.
Signed-off-by: NTrent Piepho <tpiepho@freescale.com>
Acked-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NSean MacLennan <smaclennan@pikatech.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Update my email address.
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Signed-off-by: NMatt LaPlante <kernel1@cyberdogtech.com>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

Kernel module providing implementation of LED netfilter target.  Each
instance of the target appears as a led-trigger device, which can be
associated with one or more LEDs in /sys/class/leds/
Signed-off-by: NAdam Nielsen <a.nielsen@shikadi.net>
Acked-by: NRichard Purdie <rpurdie@linux.intel.com>
Signed-off-by: NPatrick McHardy <kaber@trash.net>

Move the second part of the HP laptop disk protection functionality (a red
led) to the same driver.  From a purely Linux developer's point of view,
the led and the accelerometer have nothing related.  However, they
correspond to the same ACPI functionality, and so will always be used
together, moreover as they share the same ACPI PNP alias, there is no
other simple to allow to have same loaded at the same time if they are not
in the same module.  Also make it requires the led class to compile and
update the Kconfig text.
Signed-off-by: NPavel Machek <pavel@suse.cz>
Signed-off-by: NEric Piel <eric.piel@tremplin-utc.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NRodolfo Giometti <giometti@linux.it>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

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.

The voltage and current regulators on the WM8350 AudioPlus PMIC can be
used in concert to provide a power efficient LED driver.  This driver
implements support for this within the standard LED class.

Platform initialisation code should configure the LED hardware in the
init callback provided by the WM8350 core driver.  The callback should
use wm8350_isink_set_flash(), wm8350_dcdc25_set_mode() and
wm8350_dcdc_set_slot() to configure the operating parameters of the
regulators for their hardware and then then use wm8350_register_led() to
instantiate the LED driver.

This driver was originally written by Liam Girdwood, though it has been
extensively modified since then.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Apparently these might be called under atomic context,
and i2c operations may sleep. BUG found by
Ross Burton <ross@burtonini.com>
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

When the registration fails, we need to release the memory we allocated.
Also we need to save the error from led_classdev_register and propagate
it up, else we'll return success, even if we failed.
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

We want to go upwards, not downwards.
Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Cobalt Raq LEDs require LEDS_CLASS=y.
Signed-off-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

drivers/leds/leds-ams-delta.c:154:2: warning: returning void-valued expression
Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NRichard Purdie <rpurdie@intel.linux.com>

Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Driver for PC Engines ALIX.2 and ALIX.3 LEDs.
Signed-off-by: NConstantin Baranov <const@mimas.ru>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

The file(s) below do not use LINUX_VERSION_CODE nor KERNEL_VERSION.
  drivers/leds/leds-hp-disk.c
  drivers/misc/panasonic-laptop.c

This patch removes the said #include <version.h>.
Signed-off-by: NHuang Weiyi <weiyi.huang@gmail.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The brightness control register calculation (for the pwm) is
effectively the reverse of what would be expected.
1 is maximum brightness, 255 minimum.

This patch inverts this.
Signed-off-by: NJonathan Cameron <jic23@cam.ac.uk>
Acked-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NEric Miao <eric.miao@marvell.com>

The leds-da903x LED driver was missing the proper #include of
linux/workqueue.h, but happened to compile on ARM due to implied
includes through other header files.

We do need the explict include on other architectures (reported at least
for x86-64).
Reported-tested-and-acked-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/leds/leds-hp-disk.c:59: warning: passing argument 4 of ‘acpi_evaluate_integer’ from incompatible pointer type
Signed-off-by: NLen Brown <len.brown@intel.com>

Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Simplify logic in leds-ams-delta after various new drivers
writers misunderstood it.
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Fix a race during trigger registration where we could try and use a lock
before it was initialised.
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

led_classdev_unregister() has no "__" prefix, remove it.
Signed-off-by: NQinghuang Feng <qhfeng.kernel@gmail.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

HP notebooks contain accelerometer-based disk protection subsystem,
and LED that indicates hard disk is protected. This is driver for the
LED part.
Signed-off-by: NPavel Machek <pavel@suse.cz>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Mark pca955x_led_set() as static
Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

The cm-x270 board uses leds-gpio so remove the now unneeded driver.
Acked-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

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: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

The power led is normally lit after boot, let's use the default-on
trigger as the default trigger for it.  This gets the initial brightness
value right and being on is the default behaviour we expect for a power
led.
Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

This allows LEDs to be controlled as a backlight device where
they turn off and on when the display is blanked and unblanked.
This is useful where you need various key backlight LEDs to
dim at the same time as the backlight.
Signed-off-by: NRodolfo Giometti <giometti@linux.it>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

* Add struct ide_disk_ops containing protocol specific methods.

* Add 'struct ide_disk_ops *' to ide_drive_t.

* Convert ide-{disk,floppy} drivers to use struct ide_disk_ops.

* Merge ide-{disk,floppy} drivers into generic ide-gd driver.

While at it:
- ide_disk_init_capacity() -> ide_disk_get_capacity()
Acked-by: NBorislav Petkov <petkovbb@gmail.com>
Signed-off-by: NBartlomiej Zolnierkiewicz <bzolnier@gmail.com>

Now that device_create() has been audited, rename things back to the
original call to be sane.
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Check the return value of led_classdev_register and unregister all
registered devices, if registering one device fails.  Also the dynamic
memory handling is totally bogus.  You can't allocate multiple chunks via
kzalloc() and expect them to be in order later.  I wonder how this ever
worked.
Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Acked-by: NNate Case <ncase@xes-inc.com>
Tested-by: NNate Case <ncase@xes-inc.com>
Acked-by: NRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

On initialization, we first do the ioremap and then register the led devices.
On deinitialization, we do it in reverse order. This prevents someone calling
into the brightness_set functions with an invalid latch_address.
Signed-off-by: NSven Wegener <sven.wegener@stealer.net>
Acked-by: NRod Whitby <rod@whitby.id.au>
Acked-by: NRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Now as the scoop pins are covered by the generic gpio API,
we can use leds-gpio driver instead of special leds-spitz

Drop leds-spitz.c and the declarations of now un-referenced
spitzscoop_device, spitzscoop2_device.
Signed-off-by: NDmitry Baryshkov <dbaryshkov@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Now as the scoop pins are covered by the generic gpio API,
we can use leds-gpio driver instead of special leds-corgi

Drop leds-corgi.c and remove the declaration of now un-referenced
corgiscoop_device.
Signed-off-by: NDmitry Baryshkov <dbaryshkov@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: NDavid S. Miller <davem@davemloft.net>