1 .. SPDX-License-Identifier: GPL-2.0-or-later 2 3 Kernel driver nzxt-kraken3 4 ========================== 5 6 Supported devices: 7 8 * NZXT Kraken X53 9 * NZXT Kraken X63 10 * NZXT Kraken X73 11 * NZXT Kraken Z53 12 * NZXT Kraken Z63 13 * NZXT Kraken Z73 14 * NZXT Kraken 2023 15 * NZXT Kraken 2023 Elite 16 17 Author: Jonas Malaco, Aleksa Savic 18 19 Description 20 ----------- 21 22 This driver enables hardware monitoring support for NZXT Kraken X53/X63/X73, 23 Z53/Z63/Z73 and Kraken 2023 (standard and Elite) all-in-one CPU liquid coolers. 24 All models expose liquid temperature and pump speed (in RPM), as well as PWM 25 control (either as a fixed value or through a temp-PWM curve). The Z-series and 26 Kraken 2023 models additionally expose the speed and duty of an optionally connected 27 fan, with the same PWM control capabilities. 28 29 Pump and fan duty control mode can be set through pwm[1-2]_enable, where 1 is 30 for the manual control mode and 2 is for the liquid temp to PWM curve mode. 31 Writing a 0 disables control of the channel through the driver after setting its 32 duty to 100%. 33 34 The temperature of the curves relates to the fixed [20-59] range, correlating to 35 the detected liquid temperature. Only PWM values (ranging from 0-255) can be set. 36 If in curve mode, setting point values should be done in moderation - the devices 37 require complete curves to be sent for each change; they can lock up or discard 38 the changes if they are too numerous at once. Suggestion is to set them while 39 in an another mode, and then apply them by switching to curve. 40 41 The devices can report if they are faulty. The driver supports that situation 42 and will issue a warning. This can also happen when the USB cable is connected, 43 but SATA power is not. 44 45 The addressable RGB LEDs and LCD screen (only on Z-series and Kraken 2023 models) 46 are not supported in this driver, but can be controlled through existing userspace 47 tools, such as `liquidctl`_. 48 49 .. _liquidctl: https://github.com/liquidctl/liquidctl 50 51 Usage Notes 52 ----------- 53 54 As these are USB HIDs, the driver can be loaded automatically by the kernel and 55 supports hot swapping. 56 57 Possible pwm_enable values are: 58 59 ====== ========================================================================== 60 0 Set fan to 100% 61 1 Direct PWM mode (applies value in corresponding PWM entry) 62 2 Curve control mode (applies the temp-PWM duty curve based on coolant temp) 63 ====== ========================================================================== 64 65 Sysfs entries 66 ------------- 67 68 ============================== ================================================================ 69 fan1_input Pump speed (in rpm) 70 fan2_input Fan speed (in rpm) 71 temp1_input Coolant temperature (in millidegrees Celsius) 72 pwm1 Pump duty (value between 0-255) 73 pwm1_enable Pump duty control mode (0: disabled, 1: manual, 2: curve) 74 pwm2 Fan duty (value between 0-255) 75 pwm2_enable Fan duty control mode (0: disabled, 1: manual, 2: curve) 76 temp[1-2]_auto_point[1-40]_pwm Temp-PWM duty curves (for pump and fan), related to coolant temp 77 ============================== ================================================================
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