Lines Matching +full:fan +full:- +full:speed

1 .. SPDX-License-Identifier: GPL-2.0
4 ACPI Fan Performance States
8 fan (for example, PNP0C0B or INT3404), the ACPI fan driver creates additional
10 These attributes list properties of fan performance states.
19  $ ls -l /sys/bus/acpi/devices/INT3404:00/
22  -r--r--r-- 1 root root 4096 Dec 13 20:38 state0
23  -r--r--r-- 1 root root 4096 Dec 13 20:38 state1
24  -r--r--r-- 1 root root 4096 Dec 13 20:38 state10
25  -r--r--r-- 1 root root 4096 Dec 13 20:38 state11
26  -r--r--r-- 1 root root 4096 Dec 13 20:38 state2
27  -r--r--r-- 1 root root 4096 Dec 13 20:38 state3
28  -r--r--r-- 1 root root 4096 Dec 13 20:38 state4
29  -r--r--r-- 1 root root 4096 Dec 13 20:38 state5
30  -r--r--r-- 1 root root 4096 Dec 13 20:38 state6
31  -r--r--r-- 1 root root 4096 Dec 13 20:38 state7
32  -r--r--r-- 1 root root 4096 Dec 13 20:38 state8
33  -r--r--r-- 1 root root 4096 Dec 13 20:38 state9
34  -r--r--r-- 1 root root 4096 Dec 13 01:00 status
37 where each of the "state*" files represents one performance state of the fan
38 and contains a colon-separated list of 5 integer numbers (fields) with the
43 * ``control_percent``: The percent value to be used to set the fan speed to a
44   specific level using the _FSL object (0-100).
47   to this performance state (0-9).
49 * ``speed_rpm``: Speed of the fan in rotations per minute.
51 * ``noise_level_mdb``: Audible noise emitted by the fan in this state in
54 * ``power_mw``: Power draw of the fan in this state in milliwatts.
62 firmware is invalid, the "not-defined" string is shown instead of the value.
64 ACPI Fan Fine Grain Control
67 When _FIF object specifies support for fine grain control, then fan speed
69 _FSL object. User can adjust fan speed using thermal sysfs cooling device.
71 Here use can look at fan performance states for a reference speed (speed_rpm)
82 ACPI Fan Performance Feedback
85 The optional _FST object provides status information for the fan device.
86 This includes field to provide current fan speed in revolutions per minute
87 at which the fan is rotating.
89 This speed is presented in the sysfs using the attribute "fan_speed_rpm",