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/linux/Documentation/devicetree/bindings/hwmon/
H A Daspeed,g6-pwm-tach.yaml5 $id: http://devicetree.org/schemas/hwmon/aspeed,g6-pwm-tach.yaml#
8 title: ASPEED G6 PWM and Fan Tach controller
15 The ASPEED Fan Tacho controller can support up to 16 fan tach input.
22 - aspeed,ast2600-pwm-tach
41 - tach-ch
55 pwm_tach: pwm-tach-controller@1e610000 {
56 compatible = "aspeed,ast2600-pwm-tach";
63 tach-ch = /bits/ 8 <0x0>;
68 tach-ch = /bits/ 8 <0x1 0x2>;
H A Daspeed-pwm-tacho.txt7 one/two Fan tach inputs.
33 one/two Fan tach inputs.
45 - aspeed,fan-tach-ch : should specify the Fan tach input channel.
47 Fan tach channel 0 and 15 indicating Fan tach channel 15.
48 At least one Fan tach input channel is required.
66 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
71 aspeed,fan-tach-ch = /bits/ 8 <0x01 0x02>;
H A Dnpcm750-pwm-fan.txt30 Each fan subnode must have one PWM channel and at least one Fan tach channel.
40 - fan-tach-ch : specify the Fan tach input channel.
42 the fan tach channel number that used.
44 At least one Fan tach input channel is required
76 fan-tach-ch = /bits/ 8 <0x00 0x01>;
81 fan-tach-ch = /bits/ 8 <0x02 0x03>;
85 fan-tach-ch = /bits/ 8 <0x04>;
H A Dfan-common.yaml32 tach-div:
34 Divisor for the tach sampling clock, which determines the sensitivity of the tach pin.
61 tach-ch:
63 The tach channel used for the fan.
/linux/arch/arm/boot/dts/aspeed/
H A Daspeed-bmc-amd-daytonax.dts233 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
238 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
243 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
248 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
253 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
258 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
263 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
268 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
273 aspeed,fan-tach-ch = /bits/ 8 <0x08>;
278 aspeed,fan-tach-ch = /bits/ 8 <0x09>;
[all …]
H A Daspeed-bmc-lenovo-hr855xg2.dts342 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
347 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
352 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
357 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
362 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
367 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
372 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
377 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
382 aspeed,fan-tach-ch = /bits/ 8 <0x08>;
387 aspeed,fan-tach-ch = /bits/ 8 <0x09>;
[all …]
H A Daspeed-bmc-lenovo-hr630.dts337 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
342 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
347 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
352 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
357 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
362 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
367 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
372 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
377 aspeed,fan-tach-ch = /bits/ 8 <0x08>;
382 aspeed,fan-tach-ch = /bits/ 8 <0x09>;
[all …]
H A Daspeed-bmc-microsoft-olympus.dts179 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
184 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
189 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
194 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
199 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
204 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
H A Daspeed-bmc-facebook-wedge40.dts36 aspeed,fan-tach-ch = /bits/ 8 <0x00 0x01>;
41 aspeed,fan-tach-ch = /bits/ 8 <0x02 0x03>;
46 aspeed,fan-tach-ch = /bits/ 8 <0x04 0x05>;
51 aspeed,fan-tach-ch = /bits/ 8 <0x06 0x07>;
H A Daspeed-bmc-amd-ethanolx.dts299 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
304 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
309 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
314 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
319 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
324 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
329 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
334 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
H A Daspeed-bmc-vegman-sx20.dts128 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
132 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
136 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
140 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
144 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
148 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
152 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
H A Daspeed-bmc-opp-mowgli.dts240 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
245 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
250 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
255 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
260 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
265 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
270 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
275 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
280 aspeed,fan-tach-ch = /bits/ 8 <0x08>;
285 aspeed,fan-tach-ch = /bits/ 8 <0x09>;
H A Daspeed-bmc-opp-romulus.dts299 aspeed,fan-tach-ch = /bits/ 8 <0x08>;
304 aspeed,fan-tach-ch = /bits/ 8 <0x09>;
309 aspeed,fan-tach-ch = /bits/ 8 <0x0a>;
314 aspeed,fan-tach-ch = /bits/ 8 <0x0b>;
319 aspeed,fan-tach-ch = /bits/ 8 <0x0c>;
324 aspeed,fan-tach-ch = /bits/ 8 <0x0d>;
329 aspeed,fan-tach-ch = /bits/ 8 <0x0e>;
H A Daspeed-bmc-vegman-n110.dts127 aspeed,fan-tach-ch = /bits/ 8 <0x00 0x06>;
131 aspeed,fan-tach-ch = /bits/ 8 <0x01 0x08>;
135 aspeed,fan-tach-ch = /bits/ 8 <0x02 0x09>;
139 aspeed,fan-tach-ch = /bits/ 8 <0x03 0x0A>;
143 aspeed,fan-tach-ch = /bits/ 8 <0x04 0x0B>;
147 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
H A Daspeed-bmc-quanta-q71l.dts419 aspeed,fan-tach-ch = /bits/ 8 <0x00>;
424 aspeed,fan-tach-ch = /bits/ 8 <0x01>;
429 aspeed,fan-tach-ch = /bits/ 8 <0x02>;
434 aspeed,fan-tach-ch = /bits/ 8 <0x03>;
439 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
444 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
449 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
454 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
H A Daspeed-bmc-opp-tacoma.dts486 tach-pulses = <2>;
487 maxim,fan-rotor-input = "tach";
489 maxim,fan-dual-tach;
499 tach-pulses = <2>;
500 maxim,fan-rotor-input = "tach";
502 maxim,fan-dual-tach;
512 tach-pulses = <2>;
513 maxim,fan-rotor-input = "tach";
515 maxim,fan-dual-tach;
525 tach-pulses = <2>;
[all …]
H A Daspeed-bmc-vegman-rx20.dts229 aspeed,fan-tach-ch = /bits/ 8 <0x00 0x07>;
233 aspeed,fan-tach-ch = /bits/ 8 <0x01 0x08>;
237 aspeed,fan-tach-ch = /bits/ 8 <0x02 0x09>;
241 aspeed,fan-tach-ch = /bits/ 8 <0x03 0x0A>;
245 aspeed,fan-tach-ch = /bits/ 8 <0x04 0x0B>;
249 aspeed,fan-tach-ch = /bits/ 8 <0x05 0x0C>;
253 aspeed,fan-tach-ch = /bits/ 8 <0x06 0x0D>;
H A Daspeed-bmc-ampere-mtjade.dts700 aspeed,fan-tach-ch = /bits/ 8 <0x04>;
705 aspeed,fan-tach-ch = /bits/ 8 <0x05>;
710 aspeed,fan-tach-ch = /bits/ 8 <0x06>;
715 aspeed,fan-tach-ch = /bits/ 8 <0x07>;
720 aspeed,fan-tach-ch = /bits/ 8 <0x08>;
725 aspeed,fan-tach-ch = /bits/ 8 <0x09>;
730 aspeed,fan-tach-ch = /bits/ 8 <0x0a>;
735 aspeed,fan-tach-ch = /bits/ 8 <0x0b>;
740 aspeed,fan-tach-ch = /bits/ 8 <0x0c>;
745 aspeed,fan-tach-ch = /bits/ 8 <0x0d>;
[all …]
/linux/drivers/gpu/drm/nouveau/nvkm/subdev/therm/
H A Dgt215.c32 u32 tach = nvkm_rd32(device, 0x00e728) & 0x0000ffff; in gt215_therm_fan_sense() local
35 return tach * 60 / 2; in gt215_therm_fan_sense()
43 struct dcb_gpio_func *tach = &therm->fan->tach; in gt215_therm_init() local
47 /* enable fan tach, count revolutions per-second */ in gt215_therm_init()
49 if (tach->func != DCB_GPIO_UNUSED) { in gt215_therm_init()
51 nvkm_mask(device, 0x00e720, 0x001f0000, tach->line << 16); in gt215_therm_init()
H A Dfan.c130 u64 start, end, tach; in nvkm_therm_fan_sense() local
135 if (therm->fan->tach.func == DCB_GPIO_UNUSED) in nvkm_therm_fan_sense()
143 prev = nvkm_gpio_get(gpio, 0, therm->fan->tach.func, in nvkm_therm_fan_sense()
144 therm->fan->tach.line); in nvkm_therm_fan_sense()
149 cur = nvkm_gpio_get(gpio, 0, therm->fan->tach.func, in nvkm_therm_fan_sense()
150 therm->fan->tach.line); in nvkm_therm_fan_sense()
161 tach = (u64)60000000000ULL; in nvkm_therm_fan_sense()
162 do_div(tach, (end - start)); in nvkm_therm_fan_sense()
163 return tach; in nvkm_therm_fan_sense()
260 &therm->fan->tach); in nvkm_therm_fan_ctor()
[all …]
/linux/drivers/hwmon/
H A Dmax6620.c141 u16 tach[4]; member
155 static int max6620_fan_tach_to_rpm(u8 div, u16 tach) in max6620_fan_tach_to_rpm() argument
157 return (60 * div * MAX6620_CLOCK_FREQ) / (tach * MAX6620_PULSE_PER_REV); in max6620_fan_tach_to_rpm()
184 data->tach[i] = (ret << 3) & 0x7f8; in max6620_update_device()
188 data->tach[i] |= (ret >> 5) & 0x7; in max6620_update_device()
267 /* Setting TACH count to re-enable fan fault detection */ in max6620_read()
293 if (data->tach[channel] == 0) { in max6620_read()
297 *val = max6620_fan_tach_to_rpm(div, data->tach[channel]); in max6620_read()
328 u16 tach; in max6620_write() local
374 tach = max6620_fan_rpm_to_tach(div, val); in max6620_write()
[all …]
H A Dpwm-fan.c68 struct pwm_fan_tach *tach = dev_id; in pulse_handler() local
70 atomic_inc(&tach->pulses); in pulse_handler()
83 struct pwm_fan_tach *tach = &ctx->tachs[i]; in sample_timer() local
86 pulses = atomic_read(&tach->pulses); in sample_timer()
87 atomic_sub(pulses, &tach->pulses); in sample_timer()
88 tach->rpm = (unsigned int)(pulses * 1000 * 60) / in sample_timer()
589 struct pwm_fan_tach *tach = &ctx->tachs[i]; in pwm_fan_probe() local
591 tach->irq = platform_get_irq(pdev, i); in pwm_fan_probe()
592 if (tach->irq == -EPROBE_DEFER) in pwm_fan_probe()
593 return tach->irq; in pwm_fan_probe()
[all …]
H A Daxi-fan-control.c135 const u32 tach = axi_ioread(ADI_REG_TACH_MEASUR, ctl); in axi_fan_control_get_fan_rpm() local
137 if (tach == 0) in axi_fan_control_get_fan_rpm()
142 * TACH = 60/(ppr * rpm), where rpm is revolutions per second in axi_fan_control_get_fan_rpm()
148 return DIV_ROUND_CLOSEST(60 * ctl->clk_rate, ctl->ppr * tach); in axi_fan_control_get_fan_rpm()
312 * parameters to evaluate the tach signal and, on that case we cannot set them.
314 * value that the core does not now about, we have to provide the tach
320 * the tach parameters or not on the next tach measurement cycle (corresponding
/linux/arch/arm/boot/dts/nuvoton/
H A Dnuvoton-npcm750-evb.dts284 fan-tach-ch = /bits/ 8 <0x00 0x01>;
289 fan-tach-ch = /bits/ 8 <0x02 0x03>;
294 fan-tach-ch = /bits/ 8 <0x04 0x05>;
299 fan-tach-ch = /bits/ 8 <0x06 0x07>;
304 fan-tach-ch = /bits/ 8 <0x08 0x09>;
309 fan-tach-ch = /bits/ 8 <0x0A 0x0B>;
314 fan-tach-ch = /bits/ 8 <0x0C 0x0D>;
319 fan-tach-ch = /bits/ 8 <0x0E 0x0F>;
/linux/Documentation/hwmon/
H A Dsmsc47b397.rst69 Reading tach information.
83 Reading the tach LSB locks the tach MSB.
86 How to convert the tach reading to RPM
89 The tach reading (TCount) is given by: (Tach MSB * 256) + (Tach LSB)

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