Use the attribute groups of the led-class to create the mode attribute
during probe in order to avoid racing with userspace.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Allow led-class devices to be created with optional attribute groups.
This is needed in order to allow led drivers to create custom device
attributes in a race-free manner.
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Pull LED updates from Bryan Wu:
"I just found merge window is open and I'm quite busy and almost forget
to send out this pull request. Thanks Russell and Alexandre ping me
about this.
So basically we got some clean up and leds-pwm fixing patches from
Russell"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: Remove duplicated OOM message for individual driver
drivers/leds: Replace __get_cpu_var use through this_cpu_ptr
leds: lp55xx: add DT bindings for LP55231
leds: 88pm860x: Fix missing refcount decrement for parent of_node
leds: 88pm860x: Use of_get_child_by_name
leds: leds-pwm: add DT support for LEDs wired to supply
leds: leds-pwm: implement PWM inversion
leds: leds-pwm: convert OF parsing code to use led_pwm_add()
leds: leds-pwm: provide a common function to setup a single led-pwm device
leds: pca9685: Remove leds-pca9685 driver
dell-led: add mic mute led interface
The majority of these changes are cleanups and fixes across all drivers.
Redundant error messages are removed and more PWM controllers set the
.can_sleep flag to signal that they can't be used in atomic context.
Support is added for the Broadcom Kona family of SoCs and the Intel LPSS
driver can now probe PCI devices in addition to ACPI devices. Upon shut-
down, the pwm-backlight driver will now power off the backlight. It also
uses the new descriptor-based GPIO API for more concise GPIO handling.
A large chunk of these changes also converts platforms to use the lookup
mechanism rather than relying on the global number space to reference
PWM devices. This is largely in preparation for more unification and
cleanups in future patches. Eventually it will allow the legacy PWM API
to be removed.
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Merge tag 'pwm/for-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm changes from Thierry Reding:
"The majority of these changes are cleanups and fixes across all
drivers. Redundant error messages are removed and more PWM
controllers set the .can_sleep flag to signal that they can't be used
in atomic context.
Support is added for the Broadcom Kona family of SoCs and the Intel
LPSS driver can now probe PCI devices in addition to ACPI devices.
Upon shutdown, the pwm-backlight driver will now power off the
backlight. It also uses the new descriptor-based GPIO API for more
concise GPIO handling.
A large chunk of these changes also converts platforms to use the
lookup mechanism rather than relying on the global number space to
reference PWM devices. This is largely in preparation for more
unification and cleanups in future patches. Eventually it will allow
the legacy PWM API to be removed"
* tag 'pwm/for-3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (38 commits)
pwm: fsl-ftm: set pwm_chip can_sleep flag
pwm: ab8500: Fix wrong value shift for disable/enable PWM
pwm: samsung: do not set manual update bit in pwm_samsung_config
pwm: lp3943: Set pwm_chip can_sleep flag
pwm: atmel: set pwm_chip can_sleep flag
pwm: mxs: set pwm_chip can_sleep flag
pwm: tiehrpwm: inline accessor functions
pwm: tiehrpwm: don't build PM related functions when not needed
pwm-backlight: retrieve configured PWM period
leds: leds-pwm: retrieve configured PWM period
ARM: pxa: hx4700: use PWM_LOOKUP to initialize struct pwm_lookup
ARM: shmobile: armadillo: use PWM_LOOKUP to initialize struct pwm_lookup
ARM: OMAP3: Beagle: use PWM_LOOKUP to initialize struct pwm_lookup
pwm: modify PWM_LOOKUP to initialize all struct pwm_lookup members
ARM: pxa: hx4700: initialize all the struct pwm_lookup members
ARM: OMAP3: Beagle: initialize all the struct pwm_lookup members
pwm: renesas-tpu: remove unused struct tpu_pwm_platform_data
ARM: shmobile: armadillo: initialize all struct pwm_lookup members
pwm: add period and polarity to struct pwm_lookup
pwm: twl: Really disable twl6030 PWMs
...
Pull HID patches from Jiri Kosina:
- RMI driver for Synaptics touchpads, by Benjamin Tissoires, Andrew
Duggan and Jiri Kosina
- cleanup of hid-sony driver and improved support for Sixaxis and
Dualshock 4, by Frank Praznik
- other usual small fixes and support for new device IDs
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (29 commits)
HID: thingm: thingm_fwinfo[] doesn't need to be global
HID: core: add two new usages for digitizer
HID: hid-sensor-hub: new device id and quirk for STM Sensor hub
HID: usbhid: enable NO_INIT_REPORTS quirk for Semico USB Keykoard
HID: hid-sensor-hub: Set report quirk for Microsoft Surface
HID: debug: add labels for HID Sensor Usages
HID: uhid: Use kmemdup instead of kmalloc + memcpy
HID: rmi: do not handle touchscreens through hid-rmi
HID: quirk for Saitek RAT7 and MMO7 mices' mode button
HID: core: fix validation of report id 0
HID: rmi: fix masks for x and w_x data
HID: rmi: fix wrong struct field name
HID: rmi: do not fetch more than 16 bytes in a query
HID: rmi: check for the existence of some optional queries before reading query 12
HID: i2c-hid: hid report descriptor retrieval changes
HID: add missing hid usages
HID: hid-sony - allow 3rd party INTEC controller to turn off all leds
HID: sony: Add blink support to the Sixaxis and DualShock 4 LEDs
HID: sony: Initialize the controller LEDs with a device ID value
HID: sony: Use the controller Bluetooth MAC address as the unique value in the battery name string
...
The PWM core is now able to initialize the PWM period from a lookup
table defined by board files. Use it if available and fallback to the
value supplied in pwm_period_ns.
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
I got a build error today, since LEDS_VERSATILE can be built-in while LEDS_CLASS
is a module:
drivers/built-in.o: In function `versatile_leds_probe':
:(.text+0x155020): undefined reference to `led_classdev_register'
I suggest we turn this option into 'tristate' so that the dependency
tracking works correctly.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
The OOM message of individual driver is unnecessary, and this is
duplicate the memory subsystem generic OOM message.
Signed-off-by: Xiubo Li <Li.Xiubo@freescale.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Use this_cpu_ptr for the address calculation instead of __get_cpu_var.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
The TI55231 appears to be fully compatible to the 5523 model from
National Semicondutor. This patch just adds DT bindings for it.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Milo Kim <milo.kim@ti.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
The driver obtained the reference to parent->of_node but immediately it
was overwritten by reference to child node 'leds'. The of_node_put at
the end of DT parsing function decremented only the child 'leds' so
effectively the reference to parent of_node leaked.
Getting reference to parent->of_node is not needed at all so get rid of
it to fix the reference count.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Use of_get_child_by_name to obtain reference to charger node instead of
of_find_node_by_name which can walk outside of the parent node.
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
The non-DT driver allowed an active low property to be specified, but DT
is missing this in its description. Add the property to the DT binding
document, making it optional. It defaults to active high, which retains
compatibility with existing descriptions.
This should only be used for causes where the LED is wired to supply,
and the PWM does not sensibly support its own inversion.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Some PWM outputs are wired such that the LED they're controlling is
connected to supply rather than ground. These PWMs may not support
output inversion, or when they do, disabling the PWM may set the
PWM output low, causing a "brightness" value of zero to turn the LED
fully on.
The platform data for this driver already indicates that this was
thought about, and we have the "active_low" property there already.
However, the implementation for this is missing.
Add the trivial implementation for this feature.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Convert the OF parsing code to use the common PWM LED registration code,
which means we have a consistent method, and single point where the
registration happens for both paths.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Provide a common function to setup a single led-pwm device, replacing
the platform data initialisation path with this function. This allows
us to have a common method of creating these devices in a consistent
manner, which then allows us to place the probe failure cleanup in one
place.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This driver is replaced by pwm-pca9685 driver and there is no user uses this
driver in current tree. So remove it.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Acked-by: Maximilian Güntner <maximilian.guentner@gmail.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This patch provides similar led functional of
420f973 thinkpad-acpi: Add mute and mic-mute LED functionality
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This patch refactors the way the thingm driver registers a blink(1) LED.
In order to make the driver simpler and more standard, drop the "rgb"
sysfs attribute and create one instance of LED class per RGB channel.
Actually, the name of the LED class instance registered for a blink(1)
device is "blink1::ABCD", where ABCD is the last 4 chars of the serial
number. The driver now registers 3 instances per RGB chip, named
"thingmX:{red,green,blue}:ledY" where X is the hidraw minor number and Y
is the RGB chip number (as seen by the firmware).
This patch also uses work queues to defer calls with the device, which
now allows triggers to work as expected with this LED device.
Also remove the brightness structure field and the brightness_get
backend, as it is already handled by the LED class, and changes the
prefix of functions and structures to thingm_ to match the driver name.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Pull LED updates from Bryan Wu:
"This cycle we got:
- new driver for leds-mc13783
- bug fixes
- code cleanup"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: make sure we unregister a trigger only once
leds: leds-pwm: properly clean up after probe failure
leds: clevo-mail: Make probe function __init
leds-ot200: Fix dependencies
leds-gpio: of: introduce MODULE_DEVICE_TABLE for module autoloading
leds: clevo-mail: remove __initdata marker
leds: leds-ss4200: remove __initdata marker
leds: blinkm: remove unnecessary spaces
leds: lp5562: remove unnecessary parentheses
leds: leds-ss4200: remove DEFINE_PCI_DEVICE_TABLE macro
leds: leds-s3c24xx: Trivial cleanup in header file
drivers/leds: delete non-required instances of include <linux/init.h>
leds: leds-gpio: add retain-state-suspended property
leds: leds-mc13783: Add devicetree support
leds: leds-mc13783: Remove unnecessary cleaning of registers on exit
leds: leds-mc13783: Use proper "max_brightness" value fo LEDs
leds: leds-mc13783: Use LED core PM functions
leds: leds-mc13783: Add MC34708 LED support
leds: Turn off led if blinking is disabled
ledtrig-cpu: Handle CPU hot(un)plugging
When probing with DT, we add each LED one at a time. If we find a LED
without a PWM device (because it is not available yet) we fail the
initialisation, unregister previous LEDs, and then by way of managed
resources, we free the structure.
The problem with this is we may have a scheduled and active work_struct
in this structure, and this results in a nasty kernel oops.
We need to cancel this work_struct properly upon cleanup - and the
cleanup we require is the same cleanup as we do when the LED platform
device is removed. Rather than writing this same code three times,
move it into a separate function and use it in all three places.
Fixes: c971ff185f ("leds: leds-pwm: Defer led_pwm_set() if PWM can sleep")
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Now that we have converted this driver to a real platform device
module-based thing, we move the driver down into the LEDs
subsystem and rename the config option to LEDS_VERSATILE.
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Pawel Moll <pawel.moll@arm.com>
Acked-by: Bryan Wu <cooloney@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
One of the benefits of platform_driver_probe() is that you can make
the probe function __init.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Bryan Wu <cooloney@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
The Bachmann OT200 is a Geode-based device, so OT200-specific drivers
are only useful on X86_32, except for build testing.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Bryan Wu <cooloney@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Enable autoloading of leds-gpio module when a corresponing DT entry is present.
Signed-off-by: Paolo Pisati <paolo.pisati@canonical.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Remove __initdata marker, because it is not right for a module
parameter. It will make the kernel oops problem.
(cooloney@gmail.com: update commit message since it's really a
wrong notation)
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Suggested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Remove __initdata marker, because it is not right for a module
parameter. It will make the kernel oops problem.
(cooloney@gmail.com: update commit message since it's really a
wrong notation)
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Remove unnecessary space in order to fix the following
checkpatch issues.
WARNING: space prohibited before semicolon
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Jan-Simon Möller <dl9pf@gmx.de>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Remove unnecessary parentheses in order to fix the following
checkpatch error.
ERROR: return is not a function, parentheses are not required
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Don't use DEFINE_PCI_DEVICE_TABLE macro, because this macro
is deprecated.
Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
None of these files are actually using any __init type directives
and hence don't need to include <linux/init.h>. Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.
Cc: Bryan Wu <cooloney@gmail.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: linux-leds@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Some gpio-leds need retain the state even in suspend, such as charger led.
But this property missed in devicetree, add it.
(cooloney@gmail.com: fold DT binding updates into this patch)
Signed-off-by: Robin Gong <b38343@freescale.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This patch adds devicetree support for the MC13XXX LED driver.
(cooloney@gmail.com: remove unneeded semicolon)
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
LED core switches each LED to OFF-state on exit, so there is no need
for resetting registers.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Instead of using maximum value of 255 and shift it to appropriate
LED duty cycle, this patch introduce a helper to use proper maximum
value for each LED.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
When using the timer trigger and setting delay_on to 0, the led
will stay in whatever state is was in, while intuitively one
would expect it to turn off. This patch changes the behaviour to
turn it off.
Signed-off-by: Stefan Sørensen <stefan.sorensen@spectralink.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
When CPU is hot(un)plugged, no syscore notification is being
generated, nor is cpuidle involved. This leaves the CPU LED
turned on, because the dying thread is doing some work (LED on)
and than it is... well, dying (LED still on :-)
Added notifier block for hot(un)plugging operations, generating
existing trigger events.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
With the move of kirkwood into mach-mvebu, drivers Kconfig need
tweeking to allow the kirkwood specific drivers to be built.
Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@linaro.org>
Acked-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Tested-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Cc: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Bryan Wu <cooloney@gmail.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <eduardo.valentin@ti.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Pull LED subsystem update from Bryan Wu:
"Basically this cycle is mostly cleanup for LED subsystem"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds:
leds: s3c24xx: Remove hardware.h inclusion
leds: replace list_for_each with list_for_each_entry
leds: kirkwood: Cleanup in header files
leds: pwm: Remove a warning on non-DT platforms
leds: leds-pwm: fix duty time overflow.
leds: leds-mc13783: Remove unneeded mc13xxx_{un}lock
leds: leds-mc13783: Remove duplicate field in platform data
drivers: leds: leds-tca6507: check CONFIG_GPIOLIB whether defined for 'gpio_base'
leds: lp5523: Support LED MUX configuration on running a pattern
leds: lp5521/5523: Fix multiple engine usage bug
LEDS: tca6507 - fix up some comments.
LEDS: tca6507: add device-tree support for GPIO configuration.
LEDS: tca6507 - fix bugs in parsing of device-tree configuration.
The contents of this header file is not referenced in the led driver.
Remove its inclusion. While at it, re-arrange the headers as per the
category.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
This removes a warning on non-DT-enabled platforms:
drivers/leds/leds-pwm.c: In function 'led_pwm_create_of':
drivers/leds/leds-pwm.c:88:22: warning: unused variable 'node'
Really caused by the local variable that is assigned to and then never
used. Just do away with the local var, it's not needed.
Technically this code path can never be entered without DT enabled,
since there's an earlier check about number of children in the calling
function, but the compiler can't see that.
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
Overflow maybe occurs when calculates the duty time. For instance,
the period time is 990000000ns, and the max_brightness is 127, when
setting the brightness to 12, the duty value will be 25906026ns, but
it should be 93543307ns.
Signed-off-by: Bryan Wu <cooloney@gmail.com>
LED registers are used only in this driver, so no additional
locking is needed. Read-Modify-Write cycle in workqueue is already
protected by regmap.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
LED platform data are overwhelmed by excessive field "max_cur"
which just replicates few bits of "led_control" field.
This patch removes this field and adds a definition for the
current settings in the header.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
