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/Documentation/devicetree/bindings/hwmon/
Dadi,axi-fan-control.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/hwmon/adi,axi-fan-control.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Nuno Sá <nuno.sa@analog.com>
22 - adi,axi-fan-control-1.00.a
33 pulses-per-revolution:
35 Value specifying the number of pulses per revolution of the controlled
41 - compatible
42 - reg
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Dpwm-fan.yaml1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/hwmon/pwm-fan.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Jean Delvare <jdelvare@suse.com>
11 - Guenter Roeck <linux@roeck-us.net>
15 const: pwm-fan
17 cooling-levels:
19 $ref: /schemas/types.yaml#/definitions/uint32-array
23 fan-supply:
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Dmaxim,max6639.yaml1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
3 ---
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
11 - Naresh Solanki <naresh.solanki@9elements.com>
14 The MAX6639 is a 2-channel temperature monitor with dual, automatic, PWM
15 fan-speed controller. It monitors its own temperature and one external
16 diode-connected transistor or the temperatures of two external diode-connected
20 https://datasheets.maximintegrated.com/en/ds/MAX6639-MAX6639F.pdf
25 - maxim,max6639
30 '#address-cells':
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Dfan-common.yaml1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
3 ---
4 $id: http://devicetree.org/schemas/hwmon/fan-common.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Naresh Solanki <naresh.solanki@9elements.com>
11 - Billy Tsai <billy_tsai@aspeedtech.com>
14 max-rpm:
20 min-rpm:
26 pulses-per-revolution:
28 The number of pulse from fan sensor per revolution.
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/Documentation/hwmon/
Dg762.rst5 and performs closed-loop or open-loop control of the fan speed. Two
6 modes - PWM or DC - are supported by the device.
9 http://natisbad.org/NAS/ref/GMT_EDS-762_763-080710-0.2.pdf. sysfs
10 bindings are described in Documentation/hwmon/sysfs-interface.rst.
18 hardware characteristics of the system (reference clock, pulses per
19 fan revolution, ...); Those can be modified via devicetree bindings
25 set desired fan speed. This only makes sense in closed-loop
36 number of pulses per fan revolution. Supported values
44 in closed-loop control mode, if fan RPM value is 25% out
50 speed control (open-loop) via pwm1 described below, 2 for
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Dg760a.rst6 * Global Mixed-mode Technology Inc. G760A
12 http://www.gmt.com.tw/product/datasheet/EDS-760A.pdf
17 -----------
20 and performs closed-loop control of the fan speed.
23 consecutive speed pulses. The period is defined in terms of clock
31 source and a 2 pulse-per-revolution fan.
Dsl28cpld.rst1 .. SPDX-License-Identifier: GPL-2.0-only
17 -----------
30 -------------
35 fan1_input Fan RPM. Assuming 2 pulses per revolution.
Damc6821.rst19 -----------
22 The chip has one on-chip and one remote temperature sensor and one pwm fan
29 temp1_input ro on-chip temperature
50 fan1_pulses rw Pulses per revolution can be either 2 or 4.
57 combination of the on-chip temperature and
58 remote-sensor temperature,
72 temp1_auto_point2_temp rw The low-temperature limit of the proportional
89 temp2_auto_point2_temp rw The low-temperature limit of the proportional
104 -----------------
112 - init=1,
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Ddme1737.rst18 Addresses scanned: none, address read from Super-I/O config space
34 Addresses scanned: none, address read from Super-I/O config space
43 -----------------
52 Include non-standard LPC addresses 0x162e and 0x164e
55 - VIA EPIA SN18000
59 -----------
63 and SCH5127 Super-I/O chips. These chips feature monitoring of 3 temp sensors
64 temp[1-3] (2 remote diodes and 1 internal), 8 voltages in[0-7] (7 external and
65 1 internal) and up to 6 fan speeds fan[1-6]. Additionally, the chips implement
66 up to 5 PWM outputs pwm[1-3,5-6] for controlling fan speeds both manually and
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Dsmsc47b397.rst6 * SMSC LPC47B397-NC
8 * SMSC SCH5307-NS
20 - Mark M. Hoffman <mhoffman@lightlink.com>
21 - Utilitek Systems, Inc.
25 The following specification describes the SMSC LPC47B397-NC [1]_ sensor chip
27 provided by Craig Kelly (In-Store Broadcast Network) and edited/corrected
30 .. [1] And SMSC SCH5307-NS and SCH5317, which have different device IDs but are
33 -------------------------------------------------------------------------
36 -------------------------------------------------------------------------
87 --------------------------------------
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Dsysfs-interface.rst5 through the sysfs interface. Since lm-sensors 3.0.0, libsensors is
6 completely chip-independent. It assumes that all the kernel drivers
10 This is a major improvement compared to lm-sensors 2.
22 For this reason, even if we aim at a chip-independent libsensors, it will
37 Up to lm-sensors 3.0.0, libsensors looks for hardware monitoring attributes
38 in the "physical" device directory. Since lm-sensors 3.0.1, attributes found
46 There is only one value per file, unlike the older /proc specification.
61 to cause an alarm) is chip-dependent.
69 ----------------
76 -------------------------------------------------------------------------
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/Documentation/ABI/testing/
Dsysfs-class-hwmon16 The contents of the label are free-form.
135 this voltage channel is being used for, and user-space
137 user-space.
145 When disabled the sensor read will return -ENODATA.
147 - 1: Enable
148 - 0: Disable
156 - 1: Failed
157 - 0: Ok
204 Unit: revolution/min (RPM)
212 Unit: revolution/min (RPM)
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