| b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame^] | 1 | What: /sys/class/leds/<led>/pattern |
| 2 | Date: September 2018 |
| 3 | KernelVersion: 4.20 |
| 4 | Description: |
| 5 | Specify a software pattern for the LED, that supports altering |
| 6 | the brightness for the specified duration with one software |
| 7 | timer. It can do gradual dimming and step change of brightness. |
| 8 | |
| 9 | The pattern is given by a series of tuples, of brightness and |
| 10 | duration (ms). |
| 11 | |
| 12 | The exact format is described in: |
| 13 | Documentation/devicetree/bindings/leds/leds-trigger-pattern.txt |
| 14 | |
| 15 | What: /sys/class/leds/<led>/hw_pattern |
| 16 | Date: September 2018 |
| 17 | KernelVersion: 4.20 |
| 18 | Description: |
| 19 | Specify a hardware pattern for the LED, for LED hardware that |
| 20 | supports autonomously controlling brightness over time, according |
| 21 | to some preprogrammed hardware patterns. It deactivates any active |
| 22 | software pattern. |
| 23 | |
| 24 | Since different LED hardware can have different semantics of |
| 25 | hardware patterns, each driver is expected to provide its own |
| 26 | description for the hardware patterns in their ABI documentation |
| 27 | file. |
| 28 | |
| 29 | What: /sys/class/leds/<led>/repeat |
| 30 | Date: September 2018 |
| 31 | KernelVersion: 4.20 |
| 32 | Description: |
| 33 | Specify a pattern repeat number. -1 means repeat indefinitely, |
| 34 | other negative numbers and number 0 are invalid. |
| 35 | |
| 36 | This file will always return the originally written repeat |
| 37 | number. |