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Milo(Woogyom) Kim f652480802 leds-lp55xx: clean up init leds in lp5521/5523
To make LED initialization code simple, new function, _register_leds()
 is added at each driver.
 This patch is a preceding step for lp55xx common driver architecture.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-02-06 15:59:26 -08:00
Milo(Woogyom) Kim 1a9914855d leds-lp55xx: clean up deinit_device() in lp5521/5523
Device de-initialization code is moved to _deinit_device() at each driver.
 This patch is a preceding step for lp55xx common driver architecture.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-02-06 15:59:26 -08:00
Milo(Woogyom) Kim 944f7b1ded leds-lp55xx: clean up init_device() in lp5521/5523
To make _probe() simple, device initialization code is moved to
 _init_device() at each driver.
 This patch is a preceding step for lp55xx common driver architecture.

 leds-lp5521:
 When 'lp5521_init_device()' gets failed, error handling should be 'fail1'
 rather than 'fail2'.
   fail1: releasing platform resource and return code
   fail2: releasing allocated LED devices with handling 'fail1'
 The 'lp5521_init_device()' is called before creating LED devices.
 Thus, 'goto fail1' is proper error handler of this function.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2013-02-06 15:59:25 -08:00
Linus Torvalds e81d372ff9 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds
Pull LED subsystem update from Bryan Wu.

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (47 commits)
  leds: leds-lp5521: return an error code on error in probe()
  leds: leds-clevo-mail: Use pr_* instead of printks
  leds: leds-rb532: Fix checkpatch errors
  leds: led-triggers: Fix checkpatch warnings
  leds: ledtrig-backlight: Fix checkpatch error
  leds: leds-wrap: Use <linux/io.h> instead of <asm/io.h>
  leds: leds-wm8350: Use dev_err instead of printk
  leds: leds-pwm: Fix checkpatch warning
  leds: leds-pca955x: Use dev_info instead of printk
  leds: leds-net48xx: Use linux/io.h instead of asm/io.h
  leds: leds-lt3593: Fix checkpatch warnings
  leds: leds-gpio: Use dev_info instead of printk
  leds: leds-da903x: Fix checkpatch error and warnings
  leds: leds-bd2802: Fix checkpatch warnings
  leds: leds-adp5520: Fix checkpatch warnings
  leds: led-class: Fix checkpatch warning
  leds: leds-ns2: use devm_gpio_request_one
  leds: leds-lt3593: use devm_gpio_request_one
  leds: leds-gpio: use devm_gpio_request_one
  leds: lp3944: Fix return value
  ...
2012-12-15 12:52:42 -08:00
Bill Pemberton 98ea1ea20c leds: remove use of __devinit
CONFIG_HOTPLUG is going away as an option so __devinit is no longer
needed.

Signed-off-by: Bill Pemberton <wfp5p@virginia.edu>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Jan-Simon Moeller <jansimon.moeller@gmx.de>
Acked-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-11-28 12:34:57 -08:00
Sachin Kamat 5ebab74a71 leds: lp5523: Fix return value
Return the value obtained from i2c_smbus_read_byte_data() instead of
-EIO. Silences the following smatch warning:
drivers/leds/leds-lp5523.c:174 lp5523_read() info:
why not propagate 'ret' from i2c_smbus_read_byte_data() instead of -5?

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2012-11-26 14:43:55 -08:00
Jingoo Han eef4aa652c leds: leds-lp5523: replace strict_strtoul() with kstrtoul()
The usage of strict_strtoul() is not preferred, because
strict_strtoul() is obsolete. Thus, kstrtoul() should be
used.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2012-11-26 14:28:51 -08:00
Jingoo Han 1b21ec5a28 leds: leds-lp5523: fix build warnings
This patch fixes build warnings as below:

drivers/leds/leds-lp5523.c: In function 'lp5523_selftest':
drivers/leds/leds-lp5523.c:496:18: warning: 'adc' may be used uninitialized in this function [-Wuninitialized]
drivers/leds/leds-lp5523.c:471:5: warning: 'vdd' may be used uninitialized in this function [-Wuninitialized]
drivers/leds/leds-lp5523.c: In function 'lp5523_probe':
drivers/leds/leds-lp5523.c:252:9: warning: 'status' may be used uninitialized in this function [-Wuninitialized]
drivers/leds/leds-lp5523.c:201:5: note: 'status' was declared here

If lp5523_read() returns an error, problems will happen. Thus,
when lp5523_read() returns an error, it should be handled.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
2012-11-26 14:28:49 -08:00
Kim, Milo f162584232 leds-lp5523: Fix riskiness of the page fault
The last attribute should be terminated as NULL because any member of
attribute structure is accessed while adding the sysfs file.
If not, invalid address may cause the page fault problem.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-13 11:54:21 +08:00
Kim, Milo 23301b7f1b leds-lp5523: turn off the LED engines on unloading the driver
The LP5523 has 3 engines which are used for running LED patterns.
These engines should be off while unloading the driver.
Obviously, LP5523 platform data are used for releasing the resource
such like enable()/release_resource(), but these are not mandatory.
Therefore this patch is required without the platform data dependency.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-13 11:48:34 +08:00
Kim, Milo 56a1e9adc8 leds-lp5523: use the i2c device id rather than fixed name
LP5523 driver supports both LP5523 and LP55231. The i2c device id
is one of the two - lp5523 or lp55231. So it's better to use
matching i2c device id while enumerating the device and naming LED
channels.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-11 18:32:42 +08:00
Kim, Milo 27d7704e5e leds-lp5523: add new device id for LP55231
To support LP55231 device, the device id is added. Additionally,
the i2c driver name is changed from lp5523 to lp5523x.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-11 18:32:42 +08:00
Kim, Milo 469eba0230 leds-lp5523: minor code style fixes
(a) use LP5523_ENABLE rather than magic number 0x40
(b) use min_t() in lp5523_mux_parse()
(c) skip while loop and just return if invalid command

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-11 18:32:41 +08:00
Kim, Milo 6f6365fbac leds-lp5523: change the return type of lp5523_set_mode()
The return value of this function is not handled any place, so
make it as void type.

And three if-statements are replaced with switch-statements.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-11 18:32:41 +08:00
Kim, Milo a39b9854c7 leds-lp5523: set the brightness to 0 forcely on removing the driver
Turning off the brightness of each channel is required
when removing the driver.

So use flush_work() rather than cancel_work_sync() to execute
remaining brightness works.

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-11 18:32:41 +08:00
Kim, Milo 94b43b6771 leds-lp5523: add channel name in the platform data
The name of each led channel is configurable.
If the name is NULL, just use the channel id for making the channel name

Signed-off-by: Milo(Woogyom) Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-09-11 18:32:41 +08:00
Bryan Wu 94ca4bccac leds: convert LP5523 LED driver to devm_kzalloc() and cleanup error exit path
Cc: Mathias Nyman <mathias.nyman@nokia.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-07-24 07:52:38 +08:00
Dan Carpenter 5391dd0a9d leds-lp5523: BUG() in error handling in probe()
Inside the error handling in lp5523_init_led(), there is a place that
calls to led_classdev_unregister().  When we unregister the LED drivers,
it tries to set the brightness to OFF.  In this driver setting the
brightness is done through a work queue and the work queue hasn't been
initialized yet.

The result is that we trigger a WARN_ON() in the __queue_work().

The fix is to move the INIT_WORK() in front of the call to
lp5523_init_led().

Matt Renzelmann found this using a bug finding tool.

Reported-by: Matt Renzelmann <mjr@cs.wisc.edu>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
2012-07-24 07:52:35 +08:00
Andrew Morton d06cb46c3e drivers/leds/leds-lp5523.c: constify some data
Saves ~50 bytes text and speeds things up.

Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-23 16:58:35 -07:00
Axel Lin 1980bcfa6b drivers/leds/leds-lp5523.c: remove unneeded forward declaration
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-10 16:30:49 -08:00
Axel Lin 09a0d183ef leds: convert led i2c drivers to module_i2c_driver
Factor out some boilerplate code for i2c driver registration
into module_i2c_driver.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Cc: Haojian Zhuang <hzhuang1@marvell.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Michael Hennerich <hennerich@blackfin.uclinux.org>
Cc: Mike Rapoport <mike@compulab.co.il>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-01-10 16:30:48 -08:00
Ralf Baechle 33721bd3d0 drivers/leds/leds-lp5523.c: fix section mismatches
Fix this section mismatch:

  WARNING: drivers/leds/leds-lp5523.o(.text+0x12f4): Section mismatch in reference from the function lp5523_probe() to the function .init.text:lp5523_init_led()
  The function lp5523_probe() references
  the function __init lp5523_init_led().
  This is often because lp5523_probe lacks a __init
  annotation or the annotation of lp5523_init_led is wrong.

Fixing this one triggers one more mismatch, fix that one as well.

Signed-off-by: Ralf Baechle <ralf@linux-mips.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>
2011-06-27 18:00:13 -07:00
Vasiliy Kulikov ccd7510fd8 drivers/leds/leds-lp5523.c: world-writable engine* sysfs files
Don't allow everybody to change LED settings.

Signed-off-by: Vasiliy Kulikov <segoon@openwall.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-03-22 17:43:59 -07:00
Samu Onkalo fbac0812de leds: lp5523: fix circular locking
Driver contained possibility for circular locking.

One lock is held by sysfs-core and another one by the driver itself.  This
happened when the driver created or removed sysfs entries dynamically.
There is no real need to do those operations.  Now all the sysfs entries
are created at probe and removed at removal.  Engine load and mux
configuration sysfs entries are now visible all the time.  However, access
to the entries fails if the engine is disabled or running.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Arun Murthy <arun.murthy@stericsson.com>
Reviewed-by: Ilkka Koskinen <ilkka.koskinen@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-13 08:03:05 -08:00
Samu Onkalo 278ad4fd0e leds: leds-lp5523: modify the way of setting led device name
Currently all leds channels begins with string lp5523.  Patch adds a
possibility to provide name via platform data.  This makes it possible to
have several chips without overlapping sysfs names.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Arun Murthy <arun.murthy@stericsson.com>
Cc: Ilkka Koskinen <ilkka.koskinen@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-13 08:03:05 -08:00
Samu Onkalo 11e7946f19 drivers/leds/leds-lp5523.c: perform SW reset before detection
Chip detection may fail if the chip is in some odd state for example after
system restart.  Chip doesn't have HW reset line.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25 06:50:44 +09:00
Samu Onkalo 2e4840edb7 drivers/leds/leds-lp5523.c: adjust delays and add comments to them
Delays were little bit too long.  Adjust delay times and add some comments
to them.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25 06:50:43 +09:00
Samu Onkalo 87dbf6234d drivers/leds/leds-lp5523.c: change some macros to functions
A small macro changed to inline function to have proper type checking.
Inline added to two similar small functions.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-25 06:50:42 +09:00
Samu Onkalo 0efba16cc0 leds: driver for National Semiconductors LP5523 chip
LP5523 chip is nine channel led driver with programmable engines.  Driver
provides support for that chip for direct access via led class or via
programmable engines.

Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-11-12 07:55:32 -08:00