Home
last modified time | relevance | path

Searched full:tachometer (Results 1 – 25 of 40) sorted by relevance

12

/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 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 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 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 Dmax31785.rst22 dual tachometer measurements, and fan health monitoring.
24 For dual-rotor configurations the MAX31785A exposes the second rotor tachometer
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 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 Daspeed-pwm-tacho.rst14 controller supports up to 16 tachometer inputs.
H A Dnpcm750-pwm-fan.rst16 controller supports up to 16 tachometer inputs.
H A Daspeed-g6-pwm-tach.rst15 The controller supports up to 16 tachometer inputs.
H A Dmax6650.rst40 fan1_input ro fan tachometer speed in RPM
H A Damc6821.rst46 fan1_input ro tachometer speed
H A Dw83793.rst41 This driver exports 10 voltage sensors, up to 12 fan tachometer inputs,
H A Dmlxreg-fan.rst42 a PWM output and tachometer inputs.
/linux/drivers/watchdog/
H A Dwdt.c82 /* Support for the Fan Tachometer on the WDT501-P */
83 static int tachometer; variable
84 module_param(tachometer, int, 0);
85 MODULE_PARM_DESC(tachometer,
86 "WDT501-P Fan Tachometer support (0=disable, default=0)");
223 if (tachometer) { in wdt_get_status()
284 if (tachometer) { in wdt_interrupt()
371 if (tachometer) in wdt_ioctl()
640 pr_info("Fan Tachometer is %s\n", in wdt_init()
641 tachometer ? "Enabled" : "Disabled"); in wdt_init()
H A Dwdt_pci.c83 /* Support for the Fan Tachometer on the PCI-WDT501 */
84 static int tachometer; variable
85 module_param(tachometer, int, 0);
86 MODULE_PARM_DESC(tachometer,
87 "PCI-WDT501 Fan Tachometer support (0=disable, default=0)");
259 if (tachometer) { in wdtpci_get_status()
320 if (tachometer) { in wdtpci_interrupt()
408 if (tachometer) in wdtpci_ioctl()
680 pr_info("Fan Tachometer is %s\n", in wdtpci_init_one()
681 tachometer ? "Enabled" : "Disabled"); in wdtpci_init_one()
/linux/drivers/hwmon/
H A Dmlxreg-fan.c29 * tachometer every t-sample (with the default value 11.32 uS) and increment
33 * - 0xff - represents tachometer fault;
34 * - 0xfe - represents tachometer minimum value , which is 4444 RPM;
35 * - 0x00 - represents tachometer maximum value , which is 300000 RPM;
60 * struct mlxreg_fan_tacho - tachometer data (internal use):
62 * @connected: indicates if tachometer is connected;
99 * @tacho: tachometer data;
103 * @divider: divider value for tachometer RPM calculation;
H A Dlm63.c21 * The datasheet isn't very clear about what the tachometer reading is.
102 * For tachometer counts, the LM63 uses 16-bit values.
235 if (data->config & 0x04) { /* tachometer enabled */ in lm63_update_device()
1031 /* Tachometer is always enabled on LM64 */ in lm63_init_client()
1080 (data->config & 0x04) ? "tachometer input" : in lm63_init_client()
1116 if (data->config & 0x04) /* tachometer enabled */ in lm63_probe()
H A Dmax6650.c257 * Note: this tachometer is completely separate from the tachometers
542 * tachometer in max6650_read()
558 * Each tachometer counts over an interval given by the in max6650_read()
/linux/Documentation/watchdog/
H A Dwdt.rst10 - ICS WDT501-P (no fan tachometer)
37 tachometer WDT501-P Fan Tachometer support (0=disable, default=0)
/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.

12