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Searched refs:tachometer (Results 1 – 25 of 29) sorted by relevance

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/openbmc/linux/Documentation/hwmon/
H A Dmax31790.rst28 Tachometer inputs monitor fan tachometer logic outputs for precise (+/-1%)
30 Six pins are dedicated tachometer inputs. Any of the six PWM outputs can
31 also be configured to serve as tachometer inputs.
38 fan[1-12]_input RO fan tachometer speed in RPM
41 fan[1-6]_enable RW enable or disable the tachometer input
H A Dpwm-fan.rst20 from the sampled interrupts from the tachometer signal within 1 second.
25 fan1_input ro fan tachometer speed in RPM
H A Dnct7904.rst24 interface, up to 12 fan tachometer inputs, up to 4 fan control channels
36 fan[1-12]_input Fan tachometer measurements (rpm)
H A Dmax6639.rst45 fan1_input R TACH1 fan tachometer input (in RPM)
46 fan2_input R TACH2 fan tachometer input (in RPM)
H A Dmax31785.rst22 dual tachometer measurements, and fan health monitoring.
24 For dual-rotor configurations the MAX31785A exposes the second rotor tachometer
H A Daspeed-g6-pwm-tach.rst15 The controller supports up to 16 tachometer inputs.
H A Dnpcm750-pwm-fan.rst16 controller supports up to 16 tachometer inputs.
H A Daspeed-pwm-tacho.rst14 controller supports up to 16 tachometer inputs.
H A Dlm93.rst65 tachometer inputs to measure fan speed. Limit and status registers for all
68 (i.e. smart tachometer mode). It also adds measurement and control support
129 If a fan is driven using a low-side drive PWM, the tachometer
130 output of the fan is corrupted. The LM93 includes smart tachometer
131 circuitry that allows an accurate tachometer reading to be
136 fan tachometer with a pwm) to the sysfs file fan<n>_smart_tach. A zero
H A Dlm63.rst58 The datasheet isn't very clear about what the tachometer reading is.
66 The fan speed is measured using a tachometer. Contrary to most chips which
H A Dasc7621.rst73 The tachometer measurement system is flexible and able to adapt to many
103 The aSC7621 has tachometer inputs to measure fan speed on up to four fans.
122 tachometer inputs
H A Dmlxreg-fan.rst42 a PWM output and tachometer inputs.
H A Dmax6650.rst40 fan1_input ro fan tachometer speed in RPM
H A Dmax31760.rst31 function to minimize acoustic fan noise. Two tachometer inputs allow
H A Damc6821.rst46 fan1_input ro tachometer speed
H A Dit87.rst258 IT8783E/F, and late IT8712F and IT8705F also have optional 16-bit tachometer
260 not compatible with the older chips and revisions. The 16-bit tachometer mode
288 16-bit tachometer counters aren't used, fan readings can be divided by
H A Dw83793.rst41 This driver exports 10 voltage sensors, up to 12 fan tachometer inputs,
H A Ddme1737.rst163 to the number of pulses per fan revolution that the connected tachometer
/openbmc/linux/drivers/watchdog/
H A Dwdt.c83 static int tachometer; variable
84 module_param(tachometer, int, 0);
85 MODULE_PARM_DESC(tachometer,
223 if (tachometer) { in wdt_get_status()
284 if (tachometer) { in wdt_interrupt()
371 if (tachometer) in wdt_ioctl()
643 tachometer ? "Enabled" : "Disabled"); in wdt_init()
H A Dwdt_pci.c84 static int tachometer; variable
85 module_param(tachometer, int, 0);
86 MODULE_PARM_DESC(tachometer,
259 if (tachometer) { in wdtpci_get_status()
320 if (tachometer) { in wdtpci_interrupt()
408 if (tachometer) in wdtpci_ioctl()
683 tachometer ? "Enabled" : "Disabled"); in wdtpci_init_one()
/openbmc/linux/Documentation/watchdog/
H A Dwdt.rst10 - ICS WDT501-P (no fan tachometer)
37 tachometer WDT501-P Fan Tachometer support (0=disable, default=0)
/openbmc/linux/Documentation/devicetree/bindings/hwmon/
H A Dnpcm750-pwm-fan.txt4 controller outputs and 16 Fan tachometer controller inputs.
7 controller outputs and 16 Fan tachometer controller inputs.
H A Dmax31785.txt11 dual tachometer measurements, and fan health monitoring.
H A Daspeed-pwm-tacho.txt4 controller can support upto 16 Fan tachometer inputs.
/openbmc/linux/Documentation/devicetree/bindings/hwmon/pmbus/
H A Dmax31785.txt39 controller. Must be either "tach" for tachometer
76 - maxim,fan-dual-tach : Enable dual tachometer functionality

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