1 .. SPDX-License-Identifier: GPL-2.0-only
12 Datasheet: not available
14 Authors: Michael Walle <michael@walle.cc>
19 The sl28cpld is a board management controller which also exposes a hardware
20 monitoring controller. At the moment this controller supports a single fan
21 supervisor. In the future there might be other flavours and additional
22 hardware monitoring might be supported.
24 The fan supervisor has a 7 bit counter register and a counter period of 1
25 second. If the 7 bit counter overflows, the supervisor will automatically
26 switch to x8 mode to support a wider input range at the loss of
32 The following attributes are supported.
34 ======================= ========================================================
35 fan1_input Fan RPM. Assuming 2 pulses per revolution.
36 ======================= ========================================================