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+.. SPDX-License-Identifier: GPL-2.0-or-later
+
+Kernel driver nzxt-kraken2
+==========================
+
+Supported devices:
+
+* NZXT Kraken X42
+* NZXT Kraken X52
+* NZXT Kraken X62
+* NZXT Kraken X72
+
+Author: Jonas Malaco
+
+Description
+-----------
+
+This driver enables hardware monitoring support for NZXT Kraken X42/X52/X62/X72
+all-in-one CPU liquid coolers. Three sensors are available: fan speed, pump
+speed and coolant temperature.
+
+Fan and pump control, while supported by the firmware, are not currently
+exposed. The addressable RGB LEDs, present in the integrated CPU water block
+and pump head, are not supported either. But both features can be found in
+existing user-space tools (e.g. `liquidctl`_).
+
+.. _liquidctl: https://github.com/liquidctl/liquidctl
+
+Usage Notes
+-----------
+
+As these are USB HIDs, the driver can be loaded automatically by the kernel and
+supports hot swapping.
+
+Sysfs entries
+-------------
+
+======================= ========================================================
+fan1_input Fan speed (in rpm)
+fan2_input Pump speed (in rpm)
+temp1_input Coolant temperature (in millidegrees Celsius)
+======================= ========================================================