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1dd7093742
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>
37 lines
1.2 KiB
Text
37 lines
1.2 KiB
Text
What: /sys/class/leds/<led>/pattern
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Date: September 2018
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KernelVersion: 4.20
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Description:
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Specify a software pattern for the LED, that supports altering
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the brightness for the specified duration with one software
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timer. It can do gradual dimming and step change of brightness.
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The pattern is given by a series of tuples, of brightness and
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duration (ms).
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The exact format is described in:
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Documentation/devicetree/bindings/leds/leds-trigger-pattern.txt
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What: /sys/class/leds/<led>/hw_pattern
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Date: September 2018
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KernelVersion: 4.20
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Description:
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Specify a hardware pattern for the LED, for LED hardware that
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supports autonomously controlling brightness over time, according
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to some preprogrammed hardware patterns. It deactivates any active
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software pattern.
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Since different LED hardware can have different semantics of
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hardware patterns, each driver is expected to provide its own
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description for the hardware patterns in their ABI documentation
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file.
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What: /sys/class/leds/<led>/repeat
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Date: September 2018
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KernelVersion: 4.20
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Description:
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Specify a pattern repeat number. -1 means repeat indefinitely,
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other negative numbers and number 0 are invalid.
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This file will always return the originally written repeat
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number.
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