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36 lines
1.0 KiB
36 lines
1.0 KiB
.. SPDX-License-Identifier: GPL-2.0-only |
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Kernel driver sl28cpld |
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====================== |
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Supported chips: |
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* Kontron sl28cpld |
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Prefix: 'sl28cpld' |
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Datasheet: not available |
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Authors: Michael Walle <[email protected]> |
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Description |
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----------- |
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The sl28cpld is a board management controller which also exposes a hardware |
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monitoring controller. At the moment this controller supports a single fan |
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supervisor. In the future there might be other flavours and additional |
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hardware monitoring might be supported. |
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The fan supervisor has a 7 bit counter register and a counter period of 1 |
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second. If the 7 bit counter overflows, the supervisor will automatically |
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switch to x8 mode to support a wider input range at the loss of |
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granularity. |
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Sysfs entries |
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------------- |
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The following attributes are supported. |
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======================= ======================================================== |
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fan1_input Fan RPM. Assuming 2 pulses per revolution. |
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======================= ========================================================
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