kernel_optimize_test/Documentation/ABI/testing/sysfs-class-led-trigger-pattern
Krzysztof Kozlowski 1dd7093742 dt-bindings: leds: Add pattern initialization from Device Tree
Document new led-pattern property for initialization of LED triggers.
The property format is trigger-specific (except being array of
integers).  For pattern trigger, the explanation of pattern format was
moved to a common file shared with sysfs ABI.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
2019-01-16 22:06:51 +01:00

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What: /sys/class/leds/<led>/pattern
Date: September 2018
KernelVersion: 4.20
Description:
Specify a software pattern for the LED, that supports altering
the brightness for the specified duration with one software
timer. It can do gradual dimming and step change of brightness.
The pattern is given by a series of tuples, of brightness and
duration (ms).
The exact format is described in:
Documentation/devicetree/bindings/leds/leds-trigger-pattern.txt
What: /sys/class/leds/<led>/hw_pattern
Date: September 2018
KernelVersion: 4.20
Description:
Specify a hardware pattern for the LED, for LED hardware that
supports autonomously controlling brightness over time, according
to some preprogrammed hardware patterns. It deactivates any active
software pattern.
Since different LED hardware can have different semantics of
hardware patterns, each driver is expected to provide its own
description for the hardware patterns in their ABI documentation
file.
What: /sys/class/leds/<led>/repeat
Date: September 2018
KernelVersion: 4.20
Description:
Specify a pattern repeat number. -1 means repeat indefinitely,
other negative numbers and number 0 are invalid.
This file will always return the originally written repeat
number.