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Documentation: leds-lp5523: describe master fader attributes 

Add the usage of the new attributes for master faders.

Signed-off-by: Toshi Kikuchi <toshik@chromium.org>
Acked-by: Milo Kim <milo.kim@ti.com>
Acked-by: Jacek Anaszewski <j.anaszewski@samsung.com>
Signed-off-by: Bryan Wu <cooloney@gmail.com>
hifive-unleashed-5.1
Toshi Kikuchi 2015-05-12 18:15:14 -07:00 committed by Bryan Wu
parent 52da81eafa
commit 7ff6b23251
1 changed files with 30 additions and 0 deletions
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Documentation/leds/leds-lp5523.txt
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@ -49,6 +49,36 @@ There are two ways to run LED patterns.
2) Firmware interface - LP55xx common interface 2) Firmware interface - LP55xx common interface
For the details, please refer to 'firmware' section in leds-lp55xx.txt For the details, please refer to 'firmware' section in leds-lp55xx.txt
LP5523 has three master faders. If a channel is mapped to one of
the master faders, its output is dimmed based on the value of the master
fader.
For example,
echo "123000123" > master_fader_leds
creates the following channel-fader mappings:
channel 0,6 to master_fader1
channel 1,7 to master_fader2
channel 2,8 to master_fader3
Then, to have 25% of the original output on channel 0,6:
echo 64 > master_fader1
To have 0% of the original output (i.e. no output) channel 1,7:
echo 0 > master_fader2
To have 100% of the original output (i.e. no dimming) on channel 2,8:
echo 255 > master_fader3
To clear all master fader controls:
echo "000000000" > master_fader_leds
Selftest uses always the current from the platform data. Selftest uses always the current from the platform data.
Each channel contains led current settings. Each channel contains led current settings.