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27 lines
989 B
27 lines
989 B
.. SPDX-License-Identifier: GPL-2.0 |
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Kernel driver for Spreadtrum SC27XX |
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=================================== |
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/sys/class/leds/<led>/hw_pattern |
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-------------------------------- |
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Specify a hardware pattern for the SC27XX LED. For the SC27XX |
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LED controller, it only supports 4 stages to make a single |
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hardware pattern, which is used to configure the rise time, |
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high time, fall time and low time for the breathing mode. |
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For the breathing mode, the SC27XX LED only expects one brightness |
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for the high stage. To be compatible with the hardware pattern |
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format, we should set brightness as 0 for rise stage, fall |
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stage and low stage. |
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- Min stage duration: 125 ms |
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- Max stage duration: 31875 ms |
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Since the stage duration step is 125 ms, the duration should be |
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a multiplier of 125, like 125ms, 250ms, 375ms, 500ms ... 31875ms. |
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Thus the format of the hardware pattern values should be: |
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"0 rise_duration brightness high_duration 0 fall_duration 0 low_duration".
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