linux-stable.git/drivers/leds/trigger, branch v5.12.2

leds: trigger/tty: Use led_set_brightness_sync() from workqueue

2021-03-10T08:27:56+00:00

led_set_brightness() involves scheduling a workqueue. As here the led's
brightness setting is done in context of the trigger's workqueue this is
unjustified overhead and it's more sensible to use
led_set_brightness_sync().

Fixes: fd4a641ac88f ("leds: trigger: implement a tty trigger")
Reported-by: Pavel Machek 
Acked-by: Pavel Machek 
Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20210219133307.4840-3-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman

leds: trigger: Fix error path to not unlock the unlocked mutex

2021-03-10T08:27:55+00:00

ttyname is allocated before the mutex is taken, so it must not be
unlocked in the error path.

Fixes: fd4a641ac88f ("leds: trigger: implement a tty trigger")
Reported-by: Pavel Machek 
Acked-by: Pavel Machek 
Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20210219133307.4840-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Greg Kroah-Hartman

leds: trigger: implement a tty trigger

2021-01-15T09:22:26+00:00

Usage is as follows:

	myled=ledname
	tty=ttyS0

	echo tty > /sys/class/leds/$myled/trigger
	echo $tty > /sys/class/leds/$myled/ttyname

. When this new trigger is active it periodically checks the tty's
statistics and when it changed since the last check the led is flashed
once.

Signed-off-by: Uwe Kleine-König 
Link: https://lore.kernel.org/r/20210113173018.bq2fkea2o3yp6rf6@pengutronix.de
Signed-off-by: Greg Kroah-Hartman

ledtrig-cpu: Limit to 8 CPUs

2020-09-30T17:15:40+00:00

Some machines have thousands of CPUs... and trigger mechanisms was not
really meant for thousands of triggers. I doubt anyone uses this
trigger on many-CPU machine; but if they do, they'll need to do it
properly.

Signed-off-by: Pavel Machek

leds: pattern trigger -- check pattern for validity

2020-07-24T10:43:57+00:00

Don't allow invalid brightness in the pattern.

Signed-off-by: Pavel Machek

leds: trigger: gpio: Avoid warning on update of inverted

2020-07-12T08:06:38+00:00

If the GPIO has not been configured yet, writing to inverted will raise
a kernel warning.

Signed-off-by: Jan Kiszka 
Signed-off-by: Pavel Machek

leds: trigger: remove redundant assignment to variable ret

2020-04-27T12:13:12+00:00

The variable ret is being assigned with a value that is never read
and it is being updated later with a new value. The initialization is
redundant and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King 
Signed-off-by: Pavel Machek

ledtrig-pattern: fix email address quoting in MODULE_AUTHOR()

2020-01-22T20:07:52+00:00

Apparently it is quite easy to forget ">" in quoting of email
address. This fixes it.

Signed-off-by: Pavel Machek

Merge tag 'leds-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds

2019-12-02T00:09:28+00:00

Pull LED updates from Pavel Machek:
 "This contains usual small updates to drivers, and removal of PAGE_SIZE
  limits on /sys/class/leds//trigger.

  We should not be really having that many triggers; but with cpu
  activity triggers we do, and we'll eventually need to fix it, but...
  remove the limit for now"

* tag 'leds-5.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/pavel/linux-leds: (26 commits)
  leds: trigger: netdev: fix handling on interface rename
  leds: an30259a: add a check for devm_regmap_init_i2c
  leds: mlxreg: Fix possible buffer overflow
  leds: pca953x: Use of_device_get_match_data()
  leds: core: Fix leds.h structure documentation
  leds: core: Fix devm_classdev_match to reference correct structure
  leds: core: Remove extern from header
  leds: lm3601x: Convert class registration to device managed
  leds: flash: Add devm_* functions to the flash class
  leds: flash: Remove extern from the header file
  leds: flash: Convert non extended registration to inline
  leds: Kconfig: Be consistent with the usage of "LED"
  leds: remove PAGE_SIZE limit of /sys/class/leds//trigger
  leds: tlc591xx: update the maximum brightness
  leds: lm3692x: Use flags from LM3692X_BRT_CTRL
  leds: lm3692x: Use flags from LM3692X_BOOST_CTRL
  leds: lm3692x: Handle failure to probe the regulator
  leds: lm3692x: Don't overwrite return value in error path
  leds: lm3692x: Print error value on dev_err
  leds: tlc591xx: use devm_led_classdev_register_ext()
  ...

leds: Use all-in-one vtime aware kcpustat accessor

2019-11-21T06:58:48+00:00

We can now safely read user kcpustat fields on nohz_full CPUs.
Use the appropriate accessor.

[ mingo: Fixed build failure. ]

Reported-by: Yauheni Kaliuta 
Signed-off-by: Frederic Weisbecker 
Cc: Jacek Anaszewski  (maintainer:LED SUBSYSTEM)
Cc: Pavel Machek  (maintainer:LED SUBSYSTEM)
Cc: Dan Murphy  (reviewer:LED SUBSYSTEM)
Cc: Peter Zijlstra 
Cc: Wanpeng Li 
Link: https://lkml.kernel.org/r/20191121024430.19938-6-frederic@kernel.org
Signed-off-by: Ingo Molnar