02 Apr, 2013
2 commits
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Now LP55xx provides automatic clock detection API, lp55xx_is_extclk_used().
The clock configuration can be done by the driver itself.(a) Concept
The default value is set by each driver with clock selection.
The internal clock selection bit is updated in case that the external clock
is not detected or clock rate is not 32KHz.(b) Change on LP55xx platform data
The clock configuration is done automatically, so no need to define
'update_config' in the platform side.
Correlated information are removed in the documentations and header.(c) Definitions moved from header to driver files
CONFIG register values are moved each driver, LP5521 and LP5562.
Not necessary definitions are removed also.Signed-off-by: Milo(Woogyom) Kim
Signed-off-by: Bryan Wu -
LP5562 can drive up to 4 channels, RGB and White.
LEDs can be controlled directly via the led class control interface.LP55xx common driver
LP5562 is one of LP55xx family device, so LP55xx common code are used.
On the other hand, chip specific configuration is defined in the structure
'lp55xx_device_config'LED pattern data
LP5562 has also internal program memory which is used for running various LED
patterns. LP5562 driver supports the firmware interface and the predefined
pattern data as well.LP5562 device attributes: 'led_pattern' and 'engine_mux'
A 'led_pattern' is an index code which runs the predefined pattern data.
And 'engine_mux' is updated with the firmware interface is activated.
Detailed description has been updated in the documentation files,
'leds-lp55xx.txt' and 'leds-lp5562.txt'.Changes on the header file
LP5562 configurable definitions are added.
Pattern RGB data is fixed as constant value.
(No side effect on other devices, LP5521 or LP5523.)(cooloney@gmail.com: remove redundant mutex_unlock(). Reported by Dan
Carpenter )Signed-off-by: Milo(Woogyom) Kim
Signed-off-by: Bryan Wu
07 Feb, 2013
1 commit
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Update changed platform data information.
Add leds-lp55xx.txt which includes the firmware interface description.Signed-off-by: Milo(Woogyom) Kim
Signed-off-by: Bryan Wu
11 Sep, 2012
1 commit
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The name of each led channel is configurable.
If the name is NULL, just use the channel id for making the channel nameSigned-off-by: Milo(Woogyom) Kim
Signed-off-by: Bryan Wu
24 Jul, 2012
3 commits
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Add driver for BlinkM device to drivers/leds/.
Add entry to MAINTAINERS file.
Add documentation in Documentation/leds/.A BlinkM is a RGB LED controlled through I2C.
This driver implements an interface to the LED framework
and another sysfs group to access the internal options
of the BlinkM.rev6: Use module_i2c_driver().
rev5: Removed own workqueue in favor of events wq.
rev4: Fixed comments by Bryan Wu.
rev3: Fixed issues found by Jonathan Neuschäfer.(bryan.wu@canonical.com: remove 2 trailing whitespace)
Signed-off-by: Jan-Simon Möller
Signed-off-by: Bryan Wu -
LM3556 :
The LM3556 is a 4 MHz fixed-frequency synchronous boost
converter plus 1.5A constant current driver for a high-current white LED.
Datasheet: www.national.com/ds/LM/LM3556.pdfTested on OMAP4430
(bryan.wu@canonical.com: use module_i2c_driver() rather than
lm3556_init/lm3556_exit for code simplicity; fixed some typo
pointed out by Rob Landley)Signed-off-by: G.Shark Jeong
Reviewed-by: Axel Lin
Reviewed-by: Kim, Milo
Acked-by: Rob Landley
Signed-off-by: Bryan Wu -
Add oneshot trigger to blink a led with configurale parameters via
sysfs.Signed-off-by: Fabio Baltieri
Cc: Shuah Khan
Signed-off-by: Bryan Wu
30 May, 2012
1 commit
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The leds timer trigger does not currently have an interface to activate a
one shot timer. The current support allows for setting two timers, one
for specifying how long a state to be on, and the second for how long the
state to be off. The delay_on value specifies the time period an LED
should stay in on state, followed by a delay_off value that specifies how
long the LED should stay in off state. The on and off cycle repeats until
the trigger gets deactivated. There is no provision for one time
activation to implement features that require an on or off state to be
held just once and then stay in the original state forever.Without one shot timer interface, user space can still use timer trigger
to set a timer to hold a state, however when user space application
crashes or goes away without deactivating the timer, the hardware will be
left in that state permanently.As a specific example of this use-case, let's look at vibrate feature on
phones. Vibrate function on phones is implemented using PWM pins on SoC
or PMIC. There is a need to activate one shot timer to control the
vibrate feature, to prevent user space crashes leaving the phone in
vibrate mode permanently causing the battery to drain.This trigger exports three properties, activate, state, and duration When
transient trigger is activated these properties are set to default values.- duration allows setting timer value in msecs. The initial value is 0.
- activate allows activating and deactivating the timer specified by
duration as needed. The initial and default value is 0. This will allow
duration to be set after trigger activation.
- state allows user to specify a transient state to be held for the specified
duration.Signed-off-by: Shuah Khan
Cc: Jonas Bonn
Cc: Richard Purdie
Cc: NeilBrown
Cc: Bryan Wu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Mar, 2012
3 commits
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The lp5521 has autonomous operation mode without external control.
Using lp5521_platform_data, various led patterns can be configurable.
For supporting this feature, new functions and device attribute are
added.Structure of lp5521_led_pattern: 3 channels are supported - red, green
and blue. Pattern(s) of each channel and numbers of pattern(s) are
defined in the pla= tform data. Pattern data are hexa codes which
include pattern commands such like set pwm, wait, ramp up/down, branch
and so on.Pattern mode functions:
* lp5521_clear_program_memory
Before running new led pattern, program memory should be cleared.
* lp5521_write_program_memory
Pattern data updated in the program memory via the i2c.
* lp5521_get_pattern
Get pattern from predefined in the platform data.
* lp5521_run_led_pattern
Stop current pattern or run new pattern.
Transition time is required between different operation mode.Device attribute - 'led_pattern': To load specific led pattern, new device
attribute is added.When the lp5521 driver is unloaded, stop current led pattern mode.
Documentation updated : description about how to define the led patterns
and example.[akpm@linux-foundation.org: checkpatch fixes]
Signed-off-by: Milo(Woogyom) Kim
Acked-by: Linus Walleij
Cc: Arun MURTHY
Cc: Srinidhi Kasagar
Cc: Richard Purdie
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The value of CONFIG register(Addr 08h) is configurable. For supporting
this feature, update_config is added in the platform data. If
'update_config' is not defined, the default value is 'LP5521_PWRSAVE_EN |
LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT'.To define CONFIG register in the platform data, the bit definitions were
mo= ved to the header file.Documentation updated : description about 'update_config' and example.
Signed-off-by: Milo(Woogyom) Kim
Acked-by: Linus Walleij
Cc: Arun MURTHY
Cc: Srinidhi Kasagar
Cc: Richard Purdie
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The name of each led channel can be configurable. For the compatibility,
the name is set to default value(xx:channelN) when 'name' is not defined.Signed-off-by: Milo(Woogyom) Kim
Acked-by: Linus Walleij
Cc: Arun MURTHY
Cc: Srinidhi Kasagar
Cc: Richard Purdie
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
05 Nov, 2011
1 commit
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Fix a typo (duplicated word) in Documentation/leds/leds-class.txt
Signed-off-by: Bryan Wu
Acked-by: Richard Purdie
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
05 Apr, 2011
1 commit
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leds: move leds-class documentation under the leds/ subdir.
Add also a leds/00-INDEX file describing the files under leds/Signed-off-by: Antonio Ospite
Acked-by: Richard Purdie
Cc: Andrew Morton
Signed-off-by: Randy Dunlap
Signed-off-by: Linus Torvalds
12 Nov, 2010
1 commit
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Create sub directory Documentation/leds and add short documentation for
LP5521 and LP5523 drivers.Signed-off-by: Samu Onkalo
Cc: Richard Purdie
Cc: Jean Delvare
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
