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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 documentation
- file at Documentation/leds/.
- 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.
- It should be noticed that some leds, like EL15203000 may
- only support indefinitely patterns, so they always store -1.
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