Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/Documentation/hwmon/sl28cpld.rst b/Documentation/hwmon/sl28cpld.rst
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+.. SPDX-License-Identifier: GPL-2.0-only
+
+Kernel driver sl28cpld
+======================
+
+Supported chips:
+
+   * Kontron sl28cpld
+
+     Prefix: 'sl28cpld'
+
+     Datasheet: not available
+
+Authors: Michael Walle <michael@walle.cc>
+
+Description
+-----------
+
+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.
+
+Sysfs entries
+-------------
+
+The following attributes are supported.
+
+======================= ========================================================
+fan1_input		Fan RPM. Assuming 2 pulses per revolution.
+======================= ========================================================