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author | Toshi Kikuchi <toshik@chromium.org> | 2015-05-13 01:15:14 (GMT) |
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committer | Bryan Wu <cooloney@gmail.com> | 2015-05-25 20:26:47 (GMT) |
commit | 7ff6b23251955dc1cf108eb4619b4a2eeac75bca (patch) | |
tree | 445abaa5486aa9aa884221aaf1b00386db8c8b6e /Documentation/leds/leds-lp5523.txt | |
parent | 52da81eafaff1388b2df97b79d317c93a048899c (diff) | |
download | linux-7ff6b23251955dc1cf108eb4619b4a2eeac75bca.tar.xz |
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>
Diffstat (limited to 'Documentation/leds/leds-lp5523.txt')
-rw-r--r-- | Documentation/leds/leds-lp5523.txt | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/Documentation/leds/leds-lp5523.txt b/Documentation/leds/leds-lp5523.txt index 5b3e91d4..0dbbd27 100644 --- a/Documentation/leds/leds-lp5523.txt +++ b/Documentation/leds/leds-lp5523.txt @@ -49,6 +49,36 @@ There are two ways to run LED patterns. 2) Firmware interface - LP55xx common interface 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. Each channel contains led current settings. |