07 Jan, 2020
4 commits
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Otherwise there's a noticeable glow even with brightness 0. Also
turning off the regulator can save additional power.Signed-off-by: Guido Günther
Signed-off-by: Pavel Machek -
Move the relevant parts out of lm3692x_remove() and call it from
there. No functional change.Signed-off-by: Guido Günther
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
This moves lm3692x_init so it can be used from
lm3692x_brightness_set. Rename to lm3692_leds_enable to pair up
with lm3692x_leds_disable. No functional change.Signed-off-by: Guido Günther
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
The current is given by the formular from page 12 of
https://www.ti.com/lit/ds/symlink/lm36922.pdf. We use this to limit the
led's max_brightness using the led-max-microamp DT property.The formula for the lm36923 is identical according to the data sheet.
Signed-off-by: Guido Günther
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek
06 Jan, 2020
5 commits
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Overvoltage protection is currently using the default of 29V. Make it
configurable via DT.Signed-off-by: Guido Günther
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
If initialization data is available and its fwnode is actually a
of_node, store this information in the led device's structure. This
will allow the device to use or provide OF-based API such (devm_xxx).Signed-off-by: Jean-Jacques Hiblot
Signed-off-by: Pavel Machek -
If the LED is acquired by a consumer device with devm_led_get(), it is
automatically released when the device is detached.Signed-off-by: Jean-Jacques Hiblot
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
This patch adds basic support for a kernel driver to get a LED device.
This will be used by the led-backlight driver.Only OF version is implemented for now, and the behavior is similar to
PWM's of_pwm_get() and pwm_put().Signed-off-by: Tomi Valkeinen
Signed-off-by: Jean-Jacques Hiblot
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
Add pointer to datasheet and fix typo in printk message.
Signed-off-by: Pavel Machek
05 Jan, 2020
1 commit
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Signed-off-by: Pavel Machek
03 Jan, 2020
3 commits
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Bad string from userspace is not worth printing warning on; gotos that
just directly return are not good, plus a comment fix.Cc: jacek.anaszewski@gmail.com, linux-leds@vger.kernel.org, linux-kernel@vger.kernel.org, dmurphy@ti.com
Signed-off-by: Pavel Machek -
Trivial cleanup removing empty line at wrong place.
Signed-off-by: Pavel Machek
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Apparently it is quite easy to forget ">" in quoting of email
address. This fixes it.Signed-off-by: Pavel Machek
22 Dec, 2019
6 commits
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This driver adds support for the LED operational mode of the
tps6105x MFD device.Acked-by: Jacek Anaszewski
Signed-off-by: Sven Van Asbroeck
Signed-off-by: Pavel Machek -
We need the of_match table if we want to use the compatible string in
the pmic's child node and get the led driver loaded automatically.Signed-off-by: Bartosz Golaszewski
Signed-off-by: Pavel Machek -
The Rohm BD2802 have no in-kernel users so we can drop the
GPIO number from the platform data and require users to
provide the GPIO line using machine descriptors.As the descriptors come with inherent polarity inversion
semantics, we invert the calls to set the GPIO line such
that 0 means "unasserted" and 1 means "asserted".Put a note in the driver that machine descriptor tables
will need to specify that the line is active low.Cc: Kim Kyuwon
Signed-off-by: Linus Walleij
Signed-off-by: Pavel Machek -
Before commit bb29b9cccd95 ("leds: pca963x: Add bindings to invert
polarity") Mode register 2 was initialized directly with either 0x01
or 0x05 for open-drain or totem pole (push-pull) configuration.Afterwards, MODE2 initialization started using bitwise operations on
top of the default MODE2 register value (0x05). Using bitwise OR for
setting OUTDRV with 0x01 and 0x05 does not produce correct results.
When open-drain is used, instead of setting OUTDRV to 0, the driver
keeps it as 1:Open-drain: 0x05 | 0x01 -> 0x05 (0b101 - incorrect)
Totem pole: 0x05 | 0x05 -> 0x05 (0b101 - correct but still wrong)Now OUTDRV setting uses correct bitwise operations for initialization:
Open-drain: 0x05 & ~0x04 -> 0x01 (0b001 - correct)
Totem pole: 0x05 | 0x04 -> 0x05 (0b101 - correct)Additional MODE2 register definitions are introduced now as well.
Fixes: bb29b9cccd95 ("leds: pca963x: Add bindings to invert polarity")
Signed-off-by: Zahari Petkov
Signed-off-by: Pavel Machek -
If a node is ignored, do not get a reference to it. Fix the bug by moving
fwnode_handle_get() where a reference to an fwnode is saved for clarity.Reported-by: Andy Shevchenko
Reviewed-by: Andy Shevchenko
Signed-off-by: Sakari Ailus
Signed-off-by: Pavel Machek -
When switching to using generic LED name composition mechanism via
devm_led_classdev_register_ext() API the part of code initializing
struct gpio_led's template name property was removed alongside.
It was however overlooked that the property was also passed to
devm_fwnode_get_gpiod_from_child() in place of "label" parameter,
which when set to NULL, results in gpio label being initialized to '?'.It could be observed in debugfs and failed to properly identify
gpio association with LED consumer.Fix this shortcoming by updating the GPIO label after the LED is
registered and its final name is known.Fixes: d7235f5feaa0 ("leds: gpio: Use generic support for composing LED names")
Cc: Russell King
Reviewed-by: Linus Walleij
Signed-off-by: Jacek Anaszewski
[fixed comment]
Signed-off-by: Pavel Machek
02 Dec, 2019
1 commit
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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()
...
21 Nov, 2019
1 commit
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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
04 Nov, 2019
19 commits
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The NETDEV_CHANGENAME code is not "unneeded" like it is stated in commit
4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface
rename").The event was accidentally misinterpreted equivalent to
NETDEV_UNREGISTER, but should be equivalent to NETDEV_REGISTER.This was the case in the original code from the openwrt project.
Otherwise, you are unable to set netdev led triggers for (non-existent)
netdevices, which has to be renamed. This is the case, for example, for
ppp interfaces in openwrt.Fixes: 06f502f57d0d ("leds: trigger: Introduce a NETDEV trigger")
Fixes: 4cb6560514fa ("leds: trigger: netdev: fix refcnt leak on interface rename")
Signed-off-by: Martin Schiller
Signed-off-by: Pavel Machek -
an30259a_probe misses a check for devm_regmap_init_i2c and may cause
problems.
Add a check and print errors like other leds drivers.Signed-off-by: Chuhong Yuan
Signed-off-by: Pavel Machek -
Error was detected by PVS-Studio:
V512 A call of the 'sprintf' function will lead to overflow of
the buffer 'led_data->led_cdev_name'.Acked-by: Jacek Anaszewski
Acked-by: Pavel Machek
Signed-off-by: Oleh Kravchenko
Signed-off-by: Pavel Machek -
This driver can use the of_device_get_match_data() API to simplify the
code. Replace calls to of_match_device() with this newer API under the
assumption that where it is called will be when we know the device is
backed by a DT node. This nicely avoids referencing the match table when
it is undefined with configurations where CONFIG_OF=n.Cc: Arnd Bergmann
Cc: Geert Uytterhoeven
Cc: Riku Voipio
Cc: Rob Herring
Cc: Frank Rowand
Cc: Jacek Anaszewski
Cc: Pavel Machek
Cc: Dan Murphy
Cc:
Signed-off-by: Stephen Boyd
Signed-off-by: Pavel Machek -
Fix the devm_classdev_match pointer initialization to the correct
structure type.Signed-off-by: Dan Murphy
Signed-off-by: Pavel Machek -
Convert LED flash class registration to device managed class
registration API.Signed-off-by: Dan Murphy
Signed-off-by: Pavel Machek -
Add the missing device managed API for registration and
unregistration for the LED flash class.Signed-off-by: Dan Murphy
Signed-off-by: Pavel Machek -
Update the Kconfig to be consistent in the case of using
"LED" in the Kconfig. LED is an acronym and should be
capitalized.Signed-off-by: Dan Murphy
Signed-off-by: Pavel Machek -
Reading /sys/class/leds//trigger returns all available LED triggers.
However, the size of this file is limited to PAGE_SIZE because of the
limitation for sysfs attribute.Enabling LED CPU trigger on systems with thousands of CPUs easily hits
PAGE_SIZE limit, and makes it impossible to see all available LED triggers
and which trigger is currently activated.We work around it here by converting /sys/class/leds//trigger to
binary attribute, which is not limited by length. This is _not_ good
design, do not copy it.Signed-off-by: Akinobu Mita
Cc: "Rafael J. Wysocki"
Cc: Pavel Machek
Cc: Dan Murphy A
Reviewed-by: Greg Kroah-Hartman
Signed-off-by: Pavel Machek -
The TLC chips actually offer 257 levels:
- 0: led OFF
- 1-255: Led dimmed is using a PWM. The duty cycle range from 0.4% to 99.6%
- 256: led fully ONFixes: e370d010a5fe ("leds: tlc591xx: Driver for the TI 8/16 Channel i2c LED driver")
Signed-off-by: Jean-Jacques Hiblot
Signed-off-by: Pavel Machek -
Use LM3692X_RAMP_EN instead of LM3692X_PWM_HYSTER_4LSB
since the later is a flag for the PWM register. The
actual register value remains unchanged.Signed-off-by: Guido Günther
Reviewed-by: Dan Murphy
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
The current setup of LM3692X_BOOST_CTRL uses flags from LM3692X_BRT_CTRL.
Use flags from LM3692X_BOOST_CTRL but leave the resulting register value
unchanged.Signed-off-by: Guido Günther
Reviewed-by: Dan Murphy
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
Instead use devm_regulator_get_optional since the regulator
is optional and check for errors.Signed-off-by: Guido Günther
Acked-by: Pavel Machek
Reviewed-by: Dan Murphy
Signed-off-by: Pavel Machek -
The driver currently reports successful initialization on every failure
as long as it's able to power off the regulator. Don't check the return
value of regulator_disable to avoid that.Signed-off-by: Guido Günther
Acked-by: Pavel Machek
Reviewed-by: Dan Murphy
Signed-off-by: Pavel Machek -
This gives a way better idea what is going on.
Signed-off-by: Guido Günther
Reviewed-by: Dan Murphy
Acked-by: Pavel Machek
Signed-off-by: Pavel Machek -
Use devm_led_classdev_register_ext() to pass the fwnode to the LED core.
The fwnode can then be used by the firmware core to create meaningful
names.Signed-off-by: Jean-Jacques Hiblot
Signed-off-by: Pavel Machek -
Use the managed API of the LED class (devm_led_classdev_register()
instead of led_classdev_register()).
This allows us to remove the code used to track-and-destroy the LED devices.Signed-off-by: Jean-Jacques Hiblot
Reviewed-by: Tomi Valkeinen
Signed-off-by: Pavel Machek -
Simplify this function implementation by using a known wrapper function.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring
Signed-off-by: Pavel Machek -
Simplify this function implementation by using a known wrapper function.
This issue was detected by using the Coccinelle software.
Signed-off-by: Markus Elfring
Signed-off-by: Pavel Machek
