Kernel driver asus_rog_ryujin

Supported devices:

  • ASUS ROG RYUJIN II 360

  • ASUS ROG RYUJIN III 360

  • ASUS ROG RYUJIN III EXTREME

  • ASUS ROG RYUJIN III EVA EDITION

  • ASUS ROG RYUJIN III WHITE EDITION

Author: Aleksa Savic

Description

This driver enables hardware monitoring support for the listed ASUS ROG RYUJIN all-in-one CPU liquid coolers. Available sensors are pump, internal and external (controller) fan speed in RPM, their duties in PWM, as well as coolant temperature.

The RYUJIN II includes a separate external fan controller. Attaching fans to the controller is optional and allows them to be controlled from the device. If not connected, the controller-related sensors will report zeroes. The RYUJIN III does not expose these controller channels.

The addressable LCD screen is not supported in this driver and should be controlled through userspace tools.

Usage notes

As these are USB HIDs, the driver can be loaded automatically by the kernel and supports hot swapping.

The pump of the RYUJIN III also has a 4-pin cable for a motherboard fan header. The cooler either hands the pump to its internal controller, which follows the PWM of the header its 4-pin cable is plugged into, or runs it at the pump duty set over USB, as reported by pwm1_enable. Writing pwm1 selects the duty set over USB, and writing 2 to pwm1_enable hands the pump back to its internal controller. Writing pwm2 sets only the internal fan duty and leaves the pump control as it is.

Sysfs entries

fan1_input

Pump speed (in rpm)

fan2_input

Internal fan speed (in rpm)

fan3_input

External (controller) fan 1 speed (in rpm, RYUJIN II only)

fan4_input

External (controller) fan 2 speed (in rpm, RYUJIN II only)

fan5_input

External (controller) fan 3 speed (in rpm, RYUJIN II only)

fan6_input

External (controller) fan 4 speed (in rpm, RYUJIN II only)

temp1_input

Coolant temperature (in millidegrees Celsius)

pwm1

Pump duty

pwm1_enable

Pump control: 1 = pwm1, 2 = internal controller following the fan header PWM (RYUJIN III only)

pwm2

Internal fan duty

pwm3

External (controller) fan duty (RYUJIN II only)