The WM831x devices feature two software controlled status LEDs with
hardware assisted blinking.

The device can also autonomously control the LEDs based on a selection
of sources.  This can be configured at boot time using either platform
data or the chip OTP.  A sysfs file in the style of that for triggers
allowing the control source to be configured at run time.  Triggers
can't be used here since they can't depend on the implementation details
of a specific LED type.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

LEDs driver for National Semiconductor LP3944 Funlight Chip
http://www.national.com/pf/LP/LP3944.html

This helper chip can drive up to 8 leds, with two programmable DIM
modes; it could even be used as a gpio expander but this driver assumes
it is used as a led controller.

The DIM modes are used to set _blink_ patterns for leds, the pattern is
specified supplying two parameters:
  - period: from 0s to 1.6s
  - duty cycle: percentage of the period the led is on, from 0 to 100

LP3944 can be found on Motorola A910 smartphone, where it drives the rgb
leds, the camera flash light and the displays backlights.
Signed-off-by: NAntonio Ospite <ospite@studenti.unina.it>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Remove an orphan Kconfig entry (LEDS_LP5521)
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Add initialisation of GPIO ports for compatibility with boards with Award
BIOS (e.g.  ALIX.3D3).
Signed-off-by: NTobias Mueller <Tobias_Mueller@twam.info>
Reviewed-by: NConstantin Baranov <const@mimas.ru>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

LP5521 is a three channel led driver with support
for hardware accelerated patterns (currently used
via lp5521-only sysfs interface).

Currently, it's used on n810 device.
Signed-off-by: NFelipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

ROHM BD2802GU is a RGB LED controller attached to i2c bus and specifically
engineered for decoration purposes.  This RGB controller incorporates
lighting patterns and illuminates.

This driver is designed to minimize power consumption, so when there is no
emitting LED, it enters to reset state.  And because the BD2802GU has lots
of features that can't be covered by the current LED framework, it
provides Advanced Configuration Function(ADF) mode, so that user
applications can set registers of BD2802GU directly.

Here are basic usage examples :
; to turn on LED (not blink)
$ echo 1 > /sys/class/leds/led1_R/brightness
; to blink LED
$ echo timer > /sys/class/leds/led1_R/trigger
$ echo 1 > /sys/class/leds/led1_R/delay_on
$ echo 1 > /sys/class/leds/led1_R/delay_off
; to turn off LED
$ echo 0 > /sys/class/leds/led1_R/brightness

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: NKim Kyuwon <chammoru@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

The leds-clevo-mail driver is in the mainline kernel since 2.6.25 and works
without severe problems. Make this driver available for a larger audience.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

The gpio led trigger will allow leds to be triggered by
gpio events.

When we give the led a gpio number, the trigger will
request_irq() on that so we don't have to keep polling
for gpio state.

It's useful for usecases as n810's keypad leds that could
be triggered by the gpio event generated when user slides
up to show the keypad.

We also provide means for userland to tell us what is the
desired brightness for that special led when it goes on
so userland could use information from ambient light sensors
and not set led brightness too high if it's not necessary.
Signed-off-by: NFelipe Balbi <me@felipebalbi.com>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Mikrotik built six LEDs into the Routerboard 532, from which one is
destined for custom use, the so called "User LED". This patch adds a
driver for it, based on the LEDs class.
Signed-off-by: NPhil Sutter <n0-1@freewrt.org>
Acked-by: NFlorian Fainelli <florian@openwrt.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Add a simple driver for pwm driver LEDs.  pwm_id and period can be defined
in board file.  It is developed for pxa, however it is probably generic
enough to be used on other platforms with pwm.
Signed-off-by: NLuotao Fu <l.fu@pengutronix.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>

Add an LED driver using the DAC124S085 DAC from NatSemi

[randy.dunlap@oracle.com: use header files for interfaces]
Signed-off-by: NGuennadi Liakhovetski <lg@denx.de>
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
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>

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>

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>

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>

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>

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>

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>

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>

* 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 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>

This driver supports the PCA9550, PCA9551, PCA9552, and PCA9553
LED driver chips.
Signed-off-by: NNate Case <ncase@xes-inc.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

NXP pca9532 is a LED dimmer/controller attached to i2c bus.  It allows
attaching upto 16 leds which can either be on, off or dimmed and/or blinked
with the two PWM modulators available.

This driver is a "new-style" i2c driver that adheres to the driver model and
implements the led framework api.  Since the leds connected to the driver are
platform specific, it is only useful when platform data is passed to the
driver to define what leds are connected to which pins.
Signed-off-by: NRiku Voipio <riku.voipio@iki.fi>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

Add a trigger which allows LEDs to default to the full
brightness state.
Signed-off-by: NNick Forbes <Nick.Forbes@huntsworth.com>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

The LEDs on the Freecom FSG-3 are connected to an external
memory-mapped latch on the ixp4xx expansion bus, and therefore cannot
be supported by any of the existing LEDs drivers.
Signed-off-by: NRod Whitby <rod@whitby.id.au>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

The leds-clevo-mail module also works with model "Clevo D400P",
add this model to the white list.
Signed-off-by: NMrton Nmeth <nm127@freemail.hu>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

The LEDS infrastructure itself does not require anything
that a platform dependant upon HAS_IOMEM.

The individual drivers do, but they are properly guarded
with the necessary platform dependencies.

One can even imagine a hypervisor based LED driver that
a platform without HAS_IOMEM might have.
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

As now tosa uses leds-gpio, drop leds-tosa driver.
Signed-off-by: NDmitry Baryshkov <dbaryshkov@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

This is a LED driver using the PWM on newer SOCs from Atmel; brightness is
controlled by changing the PWM duty cycle.  So for example if you've set up
two leds labeled "pwm0" and "pwm1":

	echo 0 > /sys/class/leds/pwm2/brightness	# off (0%)
	echo 80 > /sys/class/leds/pwm2/brightness
	echo 255 > /sys/class/leds/pwm2/brightness	# on (100%)

Note that "brightness" here isn't linear; maybe that should change.  Going
from 4 to 8 probably doubles perceived brightness, while 244 to 248 is
imperceptible.

This is mostly intended to be a simple example of PWM, although it's
realistic since LCD backlights are often driven with PWM to conserve
battery power (and offer brightness options).
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NHaavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Andrew Victor <linux@maxim.org.za>
Cc: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add support for the LEDs on the HP Jornada 620/660/680/690 devices.
Signed-off-by: NKristoffer Ericson <kristoffer.ericson@gmail.com>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

All boards using the IXP4XX-GPIO-LED driver have been updated to use
the generic leds-gpio driver instead.
Signed-off-by: NRod Whitby <rod@whitby.id.au>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

Add support for hardware accelerated LED blinking for the mail LED
commonly found on Clevo notebooks.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

Extends the leds subsystem with a blink_set() callback function which can
be optionally implemented by a LED driver. If implemented, the driver can use
the hardware acceleration for blinking a LED.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

The driver supports the mail LED commonly found on different Clevo notebooks.
The driver access the LED through the i8042 hardware which is handled by
the input subsystem.
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Signed-off-by: NRichard Purdie <rpurdie@rpsys.net>

This patch provides core support for CM-X270 platform.
Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>