| /linux/drivers/macintosh/ |
| H A D | windfarm_fcu_controls.c | 3 * Windfarm PowerMac thermal control. FCU fan control
80 struct wf_fcu_fan *fan = ct->priv; in wf_fcu_fan_release() local
82 kref_put(&fan->fcu_priv->ref, wf_fcu_release); in wf_fcu_fan_release()
83 kfree(fan); in wf_fcu_fan_release()
146 struct wf_fcu_fan *fan = ct->priv; in wf_fcu_fan_set_rpm() local
147 struct wf_fcu_priv *pv = fan->fcu_priv; in wf_fcu_fan_set_rpm()
151 if (value < fan->min) in wf_fcu_fan_set_rpm()
152 value = fan->min; in wf_fcu_fan_set_rpm()
153 if (value > fan->max) in wf_fcu_fan_set_rpm()
154 value = fan->max; in wf_fcu_fan_set_rpm()
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| H A D | windfarm_smu_controls.c | 64 /* The SMU has an "old" and a "new" way of setting the fan speed in smu_set_fan()
100 printk(KERN_WARNING "windfarm: SMU failed new fan command " in smu_set_fan()
188 if (!strcmp(l, "Rear Fan 0") || !strcmp(l, "Rear Fan") || in smu_fan_create()
189 !strcmp(l, "Rear fan 0") || !strcmp(l, "Rear fan") || in smu_fan_create()
191 fct->ctrl.name = "cpu-rear-fan-0"; in smu_fan_create()
192 else if (!strcmp(l, "Rear Fan 1") || !strcmp(l, "Rear fan 1") || in smu_fan_create()
194 fct->ctrl.name = "cpu-rear-fan-1"; in smu_fan_create()
195 else if (!strcmp(l, "Front Fan 0") || !strcmp(l, "Front Fan") || in smu_fan_create()
196 !strcmp(l, "Front fan 0") || !strcmp(l, "Front fan") || in smu_fan_create()
198 fct->ctrl.name = "cpu-front-fan-0"; in smu_fan_create()
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| /linux/drivers/gpu/drm/nouveau/nvkm/subdev/therm/ |
| H A D | fan.c | 27 #include <subdev/bios/fan.h>
32 nvkm_fan_update(struct nvkm_fan *fan, bool immediate, int target) in nvkm_fan_update() argument
34 struct nvkm_therm *therm = fan->parent; in nvkm_fan_update()
41 /* update target fan speed, restricting to allowed range */ in nvkm_fan_update()
42 spin_lock_irqsave(&fan->lock, flags); in nvkm_fan_update()
44 target = fan->percent; in nvkm_fan_update()
45 target = max_t(u8, target, fan->bios.min_duty); in nvkm_fan_update()
46 target = min_t(u8, target, fan->bios.max_duty); in nvkm_fan_update()
47 if (fan->percent != target) { in nvkm_fan_update()
48 nvkm_debug(subdev, "FAN target: %d\n", target); in nvkm_fan_update()
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| H A D | fantog.c | 39 nvkm_fantog_update(struct nvkm_fantog *fan, int percent) in nvkm_fantog_update() argument
41 struct nvkm_therm *therm = fan->base.parent; in nvkm_fantog_update()
48 spin_lock_irqsave(&fan->lock, flags); in nvkm_fantog_update()
50 percent = fan->percent; in nvkm_fantog_update()
51 fan->percent = percent; in nvkm_fantog_update()
57 u64 next_change = (percent * fan->period_us) / 100; in nvkm_fantog_update()
59 next_change = fan->period_us - next_change; in nvkm_fantog_update()
60 nvkm_timer_alarm(tmr, next_change * 1000, &fan->alarm); in nvkm_fantog_update()
62 spin_unlock_irqrestore(&fan->lock, flags); in nvkm_fantog_update()
68 struct nvkm_fantog *fan = in nvkm_fantog_alarm() local
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| H A D | fanpwm.c | 29 #include <subdev/bios/fan.h>
40 struct nvkm_fanpwm *fan = (void *)therm->fan; in nvkm_fanpwm_get() local
47 ret = therm->func->pwm_get(therm, fan->func.line, &divs, &duty); in nvkm_fanpwm_get()
50 if (card_type <= NV_40 || (fan->func.log[0] & 1)) in nvkm_fanpwm_get()
55 return nvkm_gpio_get(gpio, 0, fan->func.func, fan->func.line) * 100; in nvkm_fanpwm_get()
61 struct nvkm_fanpwm *fan = (void *)therm->fan; in nvkm_fanpwm_set() local
66 divs = fan->base.perf.pwm_divisor; in nvkm_fanpwm_set()
67 if (fan->base.bios.pwm_freq) { in nvkm_fanpwm_set()
70 divs = therm->func->pwm_clock(therm, fan->func.line); in nvkm_fanpwm_set()
71 divs /= fan->base.bios.pwm_freq; in nvkm_fanpwm_set()
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| /linux/drivers/platform/x86/ |
| H A D | gpd-pocket-fan.c | 3 * GPD Pocket fan controller driver
33 "Millicelsius values above which the fan speed increases");
38 "Hysteresis in millicelsius before lowering the fan speed");
43 "minimum fan speed to allow when system is powered by AC");
55 static void gpd_pocket_fan_set_speed(struct gpd_pocket_fan_data *fan, int speed) in gpd_pocket_fan_set_speed() argument
57 if (speed == fan->last_speed) in gpd_pocket_fan_set_speed()
60 gpiod_direction_output(fan->gpio0, !!(speed & 1)); in gpd_pocket_fan_set_speed()
61 gpiod_direction_output(fan->gpio1, !!(speed & 2)); in gpd_pocket_fan_set_speed()
63 fan->last_speed = speed; in gpd_pocket_fan_set_speed()
76 struct gpd_pocket_fan_data *fan = in gpd_pocket_fan_worker() local
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| /linux/drivers/hwmon/ |
| H A D | mlxreg-fan.c | 27 * FAN datasheet defines the formula for RPM calculations as RPM = 15/t-high.
77 * @fan: private data;
86 struct mlxreg_fan *fan; member
123 struct mlxreg_fan *fan = dev_get_drvdata(dev); in mlxreg_fan_read() local
131 tacho = &fan->tacho[channel]; in mlxreg_fan_read()
135 * Check FAN presence: FAN related bit in presence register is one, in mlxreg_fan_read()
136 * if FAN is physically connected, zero - otherwise. in mlxreg_fan_read()
138 if (tacho->prsnt && fan->tachos_per_drwr) { in mlxreg_fan_read()
139 err = regmap_read(fan->regmap, tacho->prsnt, ®val); in mlxreg_fan_read()
147 if (BIT(channel / fan->tachos_per_drwr) & regval) { in mlxreg_fan_read()
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| H A D | npcm750-pwm-fan.c | 79 /* NPCM7XX FAN Tacho registers */
140 /* FAN General Definition */
141 /* Define the maximum FAN channel number */
147 * Get Fan Tach Timeout (base on clock 214843.75Hz, 1 cnt = 4.654us)
149 * (The minimum FAN speed could to support ~640RPM/pulse 1,
165 /* Obtain the fan number */
166 #define NPCM7XX_FAN_INPUT(fan, cmp) (((fan) << 1) + (cmp)) argument
168 /* fan sample status */
269 u8 fan, u8 cmp) in npcm7xx_fan_start_capture() argument
276 fan_id = NPCM7XX_FAN_INPUT(fan, cmp); in npcm7xx_fan_start_capture()
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| /linux/Documentation/devicetree/bindings/hwmon/ |
| H A D | npcm750-pwm-fan.txt | 1 Nuvoton NPCM PWM and Fan Tacho controller device
4 controller outputs and 16 Fan tachometer controller inputs.
7 controller outputs and 16 Fan tachometer controller inputs.
9 Required properties for pwm-fan node
12 - compatible : "nuvoton,npcm750-pwm-fan" for Poleg NPCM7XX.
13 : "nuvoton,npcm845-pwm-fan" for Arbel NPCM8XX.
17 * "fan" for the Fan registers.
21 * "fan" for Fan controller operating clock.
22 - interrupts : contain the Fan interrupts with flags for falling edge.
24 - pinctrl-0 : phandle referencing pin configuration of the PWM and Fan
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| H A D | aspeed-pwm-tacho.txt | 1 ASPEED AST2400/AST2500 PWM and Fan Tacho controller device driver
3 The ASPEED PWM controller can support upto 8 PWM outputs. The ASPEED Fan Tacho
4 controller can support upto 16 Fan tachometer inputs.
6 There can be upto 8 fans supported. Each fan can have one PWM output and
7 one/two Fan tach inputs.
29 fan subnode format:
31 Under fan subnode there can upto 8 child nodes, with each child node
32 representing a fan. If there are 8 fans each fan can have one PWM port and
33 one/two Fan tach inputs.
45 - aspeed,fan-tach-ch : should specify the Fan tach input channel.
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| H A D | fan-common.yaml | 4 $id: http://devicetree.org/schemas/hwmon/fan-common.yaml#
7 title: Common Fan Properties
16 Max RPM supported by fan.
22 Min RPM supported by fan.
28 The number of pulse from fan sensor per revolution.
39 The default desired fan speed in RPM.
42 fan-driving-mode:
44 Select the driving mode of the fan.(DC, PWM and so on)
63 The tach channel used for the fan.
68 Optional fan label
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| /linux/Documentation/hwmon/ |
| H A D | g762.rst | 4 The GMT G762 Fan Speed PWM Controller is connected directly to a fan
5 and performs closed-loop or open-loop control of the fan speed. Two
19 fan revolution, ...); Those can be modified via devicetree bindings
25 set desired fan speed. This only makes sense in closed-loop
26 fan speed control (i.e. when pwm1_enable is set to 2).
29 provide current fan rotation value in RPM as reported by
30 the fan to the device.
33 fan clock divisor. Supported value are 1, 2, 4 and 8.
36 number of pulses per fan revolution. Supported values
40 reports fan failure, i.e. no transition on fan gear pin for
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| H A D | nct6775.rst | 106 There are 4 to 5 fan rotation speed sensors, 8 to 15 analog voltage sensors,
108 fan regulation strategies (plus manual fan control mode).
119 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
121 NCT6775F, fan readings can be divided by a programmable divider (1, 2, 4, 8,
123 do not have a fan speed divider. The driver sets the most suitable fan divisor
124 itself; specifically, it increases the divider value each time a fan speed
125 reading returns an invalid value, and it reduces it if the fan speed reading
133 The driver supports automatic fan control mode known as Thermal Cruise.
135 predefined temperature range. If the temperature goes out of range, fan
144 - this file stores PWM duty cycle or DC value (fan speed) in range:
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| H A D | w83792d.rst | 44 The driver implements three temperature sensors, seven fan rotation speed
45 sensors, nine voltage sensors, and two automatic fan regulation
46 strategies called: Smart Fan I (Thermal Cruise mode) and Smart Fan II.
48 The driver also implements up to seven fan control outputs: pwm1-7. Pwm1-7
53 Automatic fan control mode is possible only for fan1-fan3.
55 For all pwmX outputs, a value of 0 means minimum fan speed and a value of
56 255 means maximum fan speed.
63 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
64 triggered if the rotation speed has dropped below a programmable limit. Fan
105 of full speed rotation of corresponding fan.
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| H A D | adm9240.rst | 54 temperature, two fan speeds and chassis intrusion. Measured values can
76 with independent fan speed measurement cycles counting alternating rising
77 edges of the fan tacho inputs.
79 DS1780 measurement cycle is about once per second including fan speed.
81 LM81 measurement cycle is about once per 400ms including fan speed.
93 Fan Speed
95 Two fan tacho inputs are provided, the ADM9240 gates an internal 22.5kHz
96 clock via a divider to an 8-bit counter. Fan speed (rpm) is calculated by:
100 Automatic fan clock divider
105 - fan clock divider not changed
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| H A D | max31785.rst | 19 The Maxim MAX31785 is a PMBus device providing closed-loop, multi-channel fan
20 management with temperature and remote voltage sensing. Various fan control
22 dual tachometer measurements, and fan health monitoring.
25 readings in attributes fan[5-8]_input. By contrast the MAX31785 only exposes
26 the slowest rotor measurement, and does so in the fan[1-4]_input attributes.
38 fan[1-4]_alarm Fan alarm.
39 fan[1-4]_fault Fan fault.
40 fan[1-8]_input Fan RPM. On the MAX31785A, inputs 5-8 correspond to the
42 fan[1-4]_target Fan input target
55 pwm[1-4] Fan target duty cycle (0..255)
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| H A D | aquacomputer_d5next.rst | 8 * Aquacomputer Aquaero 5/6 fan controllers
12 * Aquacomputer Octo fan controller
13 * Aquacomputer Quadro fan controller
18 * Aquacomputer Poweradjust 3 fan controller
32 speed (in RPM), power, voltage and current. Temperature offsets and fan speeds
35 For the D5 Next pump, available sensors are pump and fan speed, power, voltage
38 count. Attaching a fan to it is optional and allows it to be controlled using
39 temperature curves directly from the pump. If it's not connected, the fan-related
69 and fan IC. It also exposes pump and fan speeds (in RPM), voltages, as well as pump
73 with speed, power, voltage and current of both the pump and optionally connected fan.
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| H A D | w83627ehf.rst | 88 2 to 5 fan rotation speed sensors, 8 to 10 analog voltage sensors, one VID
90 and some automatic fan regulation strategies (plus manual fan control mode).
105 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
106 triggered if the rotation speed has dropped below a programmable limit. Fan
109 suitable fan divisor itself. Some fans might not be present because they
116 The driver supports automatic fan control mode known as Thermal Cruise.
118 predefined temperature range. If the temperature goes out of range, fan
139 this file stores PWM duty cycle or DC value (fan speed) in range:
144 this file controls mode of fan/temperature control:
148 * 3 "Fan Speed Cruise" mode
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| H A D | g760a.rst | 19 The GMT G760A Fan Speed PWM Controller is connected directly to a fan
20 and performs closed-loop control of the fan speed.
22 The fan speed is programmed by setting the period via 'pwm1' of two
26 Setting a period of 0 stops the fan; setting the period to 255 sets
27 fan to maximum speed.
29 The measured fan rotation speed returned via 'fan1_input' is derived
31 source and a 2 pulse-per-revolution fan.
34 the G760A chip's status register: Bit 0 is set when the actual fan
35 speed differs more than 20% with respect to the programmed fan speed;
36 bit 1 is set when fan speed is below 1920 RPM.
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| H A D | max31760.rst | 21 The MAX31760 integrates temperature sensing along with precision PWM fan
27 I2C-compatible interface. Fan speed is controlled based on the temperature
30 the user to program a smooth nonlinear fan speed vs. temperature transfer
31 function to minimize acoustic fan noise. Two tachometer inputs allow
43 Lookup table for auto fan control
61 fan[1-2]_input Fan speed (in RPM)
62 fan[1-2]_enable Enable fan readings and fan fault alarms
63 fan[1-2]_fault Fan fault status
71 pwm1 PWM value for direct fan control
72 pwm1_enable 1: direct fan control, 2: temperature based auto fan control
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| /linux/arch/arm/boot/dts/aspeed/ |
| H A D | aspeed-bmc-amd-daytonax.dts | 231 fan@0 {
233 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
236 fan@1 {
238 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
241 fan@2 {
243 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
246 fan@3 {
248 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
251 fan@4 {
253 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
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| H A D | aspeed-bmc-lenovo-hr855xg2.dts | 340 fan@0 {
342 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
345 fan@1 {
347 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
350 fan@2 {
352 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
355 fan@3 {
357 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
360 fan@4 {
362 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
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| /linux/drivers/gpu/drm/nouveau/nvkm/subdev/bios/ |
| H A D | fan.c | 26 #include <subdev/bios/fan.h>
32 u32 fan = 0; in nvbios_fan_table() local
36 fan = nvbios_rd32(bios, bit_P.offset + 0x58); in nvbios_fan_table()
38 if (fan) { in nvbios_fan_table()
39 *ver = nvbios_rd08(bios, fan + 0); in nvbios_fan_table()
42 *hdr = nvbios_rd08(bios, fan + 1); in nvbios_fan_table()
43 *len = nvbios_rd08(bios, fan + 2); in nvbios_fan_table()
44 *cnt = nvbios_rd08(bios, fan + 3); in nvbios_fan_table()
45 return fan; in nvbios_fan_table()
66 nvbios_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan) in nvbios_fan_parse() argument
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| H A D | therm.c | 153 nvbios_therm_fan_parse(struct nvkm_bios *bios, struct nvbios_therm_fan *fan) in nvbios_therm_fan_parse() argument
163 fan->nr_fan_trip = 0; in nvbios_therm_fan_parse()
164 fan->fan_mode = NVBIOS_THERM_FAN_OTHER; in nvbios_therm_fan_parse()
170 fan->min_duty = value & 0xff; in nvbios_therm_fan_parse()
171 fan->max_duty = (value & 0xff00) >> 8; in nvbios_therm_fan_parse()
174 fan->nr_fan_trip++; in nvbios_therm_fan_parse()
175 if (fan->fan_mode > NVBIOS_THERM_FAN_TRIP) in nvbios_therm_fan_parse()
176 fan->fan_mode = NVBIOS_THERM_FAN_TRIP; in nvbios_therm_fan_parse()
177 cur_trip = &fan->trip[fan->nr_fan_trip - 1]; in nvbios_therm_fan_parse()
183 cur_trip = &fan->trip[fan->nr_fan_trip - 1]; in nvbios_therm_fan_parse()
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| /linux/Documentation/admin-guide/acpi/ |
| H A D | fan_performance_states.rst | 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.
37 where each of the "state*" files represents one performance state of the fan
43 * ``control_percent``: The percent value to be used to set the fan speed to a
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.
64 ACPI Fan Fine Grain Control
67 When _FIF object specifies support for fine grain control, then fan speed
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