linux-toradex.git/include/linux/leds-lp5521.h, branch v3.7

drivers/leds/leds-lp5521.c: support led pattern data

2012-03-23T23:58:34+00:00

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

drivers/leds/leds-lp5521.c: add 'update_config' in the lp5521_platform_data

2012-03-23T23:58:34+00:00

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

drivers/leds/leds-lp5521.c: add 'name' in the lp5521_led_config

2012-03-23T23:58:34+00:00

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

leds-lp5521: modify the way of setting led device name

2011-01-13T16:03:06+00:00

Currently the led device name is fetched from the device_type in
I2C_BOARD_INFO which comes from the platform data.  This name is in turn
used to create an entry in sysfs.

If there exists two or more lp5521 on a particular platform, the
device_type in I2C_BOARD_INFO has to be the same, else lp5521 driver probe
wont be called and if used so, results in run time warning "cannot create
sysfs with same name" and hence a failure.

The name that is used to create sysfs entry is to be passed by the struct
led_platform_data.  Hence adding an element of type const char * and
change in lp5521 driver to use this name in creating the led device if
present else use the name obtained by I2C_BOARD_INFO.

Signed-off-by: Arun Murthy 
Acked-by: Samu Onkalo 
Cc: Ilkka Koskinen 
Cc: Richard Purdie 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

leds: driver for National Semiconductor LP5521 chip

2010-11-12T15:55:32+00:00

This patchset provides support for LP5521 and LP5523 LED driver chips from
National Semicondutor.  Both drivers supports programmable engines and
naturally LED class features.

Documentation is provided as a part of the patchset.  I created "leds"
subdirectory under Documentation.  Perhaps the rest of the leds*
documentation should be moved there.

Datasheets are freely available at National Semiconductor www pages.

This patch:

LP5521 chip is three 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 
Cc: Richard Purdie 
Cc: Jean Delvare 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds