1 Commits

Author	SHA1	Message	Date
Jonas Malaco	82e3430dfa	hwmon: add driver for NZXT Kraken X42/X52/X62/X72 ... These are "all-in-one" CPU liquid coolers that can be monitored and controlled through a proprietary USB HID protocol. While the models have differently sized radiators and come with varying numbers of fans, they are all indistinguishable at the software level. The driver exposes fan/pump speeds and coolant temperature through the standard hwmon sysfs interface. Fan and pump control, while supported by the devices, are not currently exposed. The firmware accepts up to 61 trip points per channel (fan/pump), but the same set of trip temperatures has to be maintained for both; with pwmX_auto_point_Y_temp attributes, users would need to maintain this invariant themselves. Instead, fan and pump control, as well as LED control (which the device also supports for 9 addressable RGB LEDs on the CPU water block) are left for existing and already mature user-space tools, which can still be used alongside the driver, thanks to hidraw. A link to one, which I also maintain, is provided in the documentation. The implementation is based on USB traffic analysis. It has been runtime tested on x86_64, both as a built-in driver and as a module. Signed-off-by: Jonas Malaco <jonas@protocubo.io> Link: https://lore.kernel.org/r/20210319045544.416138-1-jonas@protocubo.io [groeck: Removed unnecessary spinlock.h include] Signed-off-by: Guenter Roeck <linux@roeck-us.net>	2021-04-20 06:50:14 -07:00