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author | Antonio Ospite <ospite@studenti.unina.it> | 2011-04-04 15:08:46 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-04-04 17:51:47 -0700 |
commit | 9a684e19afc630e0763246ee79c0578c1a8eaee8 (patch) | |
tree | 46637b603516deb789051f52a09cdf5830b5ac2a /Documentation/leds-lp3944.txt | |
parent | 9718269a7f5f6f3d723dd34e05269579a3ccfc1e (diff) | |
download | op-kernel-dev-9a684e19afc630e0763246ee79c0578c1a8eaee8.zip op-kernel-dev-9a684e19afc630e0763246ee79c0578c1a8eaee8.tar.gz |
Documentation: consolidate leds files to leds/ subdir
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 <ospite@studenti.unina.it>
Acked-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/leds-lp3944.txt')
-rw-r--r-- | Documentation/leds-lp3944.txt | 50 |
1 files changed, 0 insertions, 50 deletions
diff --git a/Documentation/leds-lp3944.txt b/Documentation/leds-lp3944.txt deleted file mode 100644 index c6eda18..0000000 --- a/Documentation/leds-lp3944.txt +++ /dev/null @@ -1,50 +0,0 @@ -Kernel driver lp3944 -==================== - - * National Semiconductor LP3944 Fun-light Chip - Prefix: 'lp3944' - Addresses scanned: None (see the Notes section below) - Datasheet: Publicly available at the National Semiconductor website - http://www.national.com/pf/LP/LP3944.html - -Authors: - Antonio Ospite <ospite@studenti.unina.it> - - -Description ------------ -The LP3944 is a helper chip that can drive up to 8 leds, with two programmable -DIM modes; it could even be used as a gpio expander but this driver assumes it -is used as a led controller. - -The DIM modes are used to set _blink_ patterns for leds, the pattern is -specified supplying two parameters: - - period: from 0s to 1.6s - - duty cycle: percentage of the period the led is on, from 0 to 100 - -Setting a led in DIM0 or DIM1 mode makes it blink according to the pattern. -See the datasheet for details. - -LP3944 can be found on Motorola A910 smartphone, where it drives the rgb -leds, the camera flash light and the lcds power. - - -Notes ------ -The chip is used mainly in embedded contexts, so this driver expects it is -registered using the i2c_board_info mechanism. - -To register the chip at address 0x60 on adapter 0, set the platform data -according to include/linux/leds-lp3944.h, set the i2c board info: - - static struct i2c_board_info __initdata a910_i2c_board_info[] = { - { - I2C_BOARD_INFO("lp3944", 0x60), - .platform_data = &a910_lp3944_leds, - }, - }; - -and register it in the platform init function - - i2c_register_board_info(0, a910_i2c_board_info, - ARRAY_SIZE(a910_i2c_board_info)); |