Kernel driver sl28cpld¶
Datasheet: not available
Authors: Michael Walle <firstname.lastname@example.org>
The sl28cpld is a board management controller which also exposes a hardware monitoring controller. At the moment this controller supports a single fan supervisor. In the future there might be other flavours and additional hardware monitoring might be supported.
The fan supervisor has a 7 bit counter register and a counter period of 1 second. If the 7 bit counter overflows, the supervisor will automatically switch to x8 mode to support a wider input range at the loss of granularity.
The following attributes are supported.
Fan RPM. Assuming 2 pulses per revolution.