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/openbmc/linux/Documentation/devicetree/bindings/hwmon/
H A 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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H A 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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H A 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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/openbmc/linux/Documentation/hwmon/
H A 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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H A 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.
H A Dsl28cpld.rst1 .. SPDX-License-Identifier: GPL-2.0-only
17 -----------
30 -------------
35 fan1_input Fan RPM. Assuming 2 pulses per revolution.
H A 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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H A 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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H A 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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/openbmc/linux/drivers/hwmon/
H A Daxi-fan-control.c1 // SPDX-License-Identifier: GPL-2.0
9 #include <linux/fpga/adi-axi-common.h>
11 #include <linux/hwmon-sysfs.h>
55 /* pulses per revolution */
65 iowrite32(val, ctl->base + reg); in axi_iowrite()
71 return ioread32(ctl->base + reg); in axi_ioread()
76 * T = /raw * 509.3140064 / 65535) - 280.2308787
82 u32 temp = axi_ioread(attr->index, ctl); in axi_fan_control_show()
84 temp = DIV_ROUND_CLOSEST_ULL(temp * 509314ULL, 65535) - 280230; in axi_fan_control_show()
102 axi_iowrite(temp, attr->index, ctl); in axi_fan_control_store()
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H A Dg762.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * g762 - Driver for the Global Mixed-mode Technology Inc. fan speed
15 * http://natisbad.org/NAS/refs/GMT_EDS-762_763-080710-0.2.pdf
27 * http://www.gmt.com.tw/product/datasheet/EDS-762_3.pdf
36 #include <linux/hwmon-sysfs.h>
66 #define G762_REG_FAN_CMD1_FAN_MODE 0x10 /* fan mode: closed/open-loop */
70 #define G762_REG_FAN_CMD1_PULSE_PER_REV 0x01 /* pulse per fan revolution */
90 /* Register data is read (and cached) at most once per second. */
94 * Extract pulse count per fan revolution value (2 or 4) from given
130 u8 set_cnt; /* controls fan rotation speed in closed-loop mode */
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H A Dpwm-fan.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * pwm-fan.c - Hwmon driver for fans connected to PWM lines.
26 atomic_t pulses; member
69 atomic_inc(&tach->pulses); in pulse_handler()
77 unsigned int delta = ktime_ms_delta(ktime_get(), ctx->sample_start); in sample_timer()
81 for (i = 0; i < ctx->tach_count; i++) { in sample_timer()
82 struct pwm_fan_tach *tach = &ctx->tachs[i]; in sample_timer()
83 int pulses; in sample_timer() local
85 pulses = atomic_read(&tach->pulses); in sample_timer()
86 atomic_sub(pulses, &tach->pulses); in sample_timer()
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H A Dsl28cpld-hwmon.c1 // SPDX-License-Identifier: GPL-2.0-only
43 ret = regmap_read(hwmon->regmap, hwmon->offset + FAN_INPUT, in sl28cpld_hwmon_read()
57 * says we should assume 2 pulses per revolution. in sl28cpld_hwmon_read()
63 return -EOPNOTSUPP; in sl28cpld_hwmon_read()
91 if (!pdev->dev.parent) in sl28cpld_hwmon_probe()
92 return -ENODEV; in sl28cpld_hwmon_probe()
94 hwmon = devm_kzalloc(&pdev->dev, sizeof(*hwmon), GFP_KERNEL); in sl28cpld_hwmon_probe()
96 return -ENOMEM; in sl28cpld_hwmon_probe()
98 hwmon->regmap = dev_get_regmap(pdev->dev.parent, NULL); in sl28cpld_hwmon_probe()
99 if (!hwmon->regmap) in sl28cpld_hwmon_probe()
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H A Dlan966x-hwmon.c1 // SPDX-License-Identifier: GPL-2.0-only
17 * T = -3.4627e-11*(N^4) + 1.1023e-7*(N^3) + -1.9165e-4*(N^2) +
18 * 3.0604e-1*(N^1) + -5.6197e1
20 * where [-56.197, 136.402]C and N = [0, 1023].
29 * T = -34627e-12*(N^4) + 110230e-9*(N^3) + -191650e-6*(N^2) +
30 * 306040e-3*(N^1) + -56197
32 * where T = [-56197, 136402]mC and N = [0, 1023].
37 {4, -34627, 1000, 1},
39 {2, -191650, 1000, 1},
41 {0, -56197, 1, 1}
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H A Dmax6639.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * max6639.c - Support for Maxim MAX6639
5 * 2-Channel Temperature Monitor with Dual PWM Fan-Speed Controller
19 #include <linux/hwmon-sysfs.h>
83 u8 temp_therm[2]; /* THERM Temperature, 0..255 C (->_max) */
84 u8 temp_alert[2]; /* ALERT Temperature, 0..255 C (->_crit) */
85 u8 temp_ot[2]; /* OT Temperature, 0..255 C (->_emergency) */
88 u8 ppr; /* Pulses per rotation 0..3 for 1..4 ppr */
98 struct i2c_client *client = data->client; in max6639_update_device()
103 mutex_lock(&data->update_lock); in max6639_update_device()
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H A Dmax6620.c1 // SPDX-License-Identifier: GPL-2.0-or-later
20 * http://pdfserv.maxim-ic.com/en/ds/MAX6620.pdf
93 #define MAX6620_PULSE_PER_REV 2 /* Tachometer pulses per revolution */
95 /* Minimum and maximum values of the FAN-RPM */
163 struct i2c_client *client = data->client; in max6620_update_device()
167 mutex_lock(&data->update_lock); in max6620_update_device()
169 if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { in max6620_update_device()
174 data->fancfg[i] = ret; in max6620_update_device()
179 data->fandyn[i] = ret; in max6620_update_device()
184 data->tach[i] = (ret << 3) & 0x7f8; in max6620_update_device()
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H A Dmax6650.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * max6650.c - Part of lm_sensors, Linux kernel modules for hardware
18 * http://pdfserv.maxim-ic.com/en/ds/MAX6650-MAX6651.pdf
27 #include <linux/hwmon-sysfs.h>
91 /* Minimum and maximum values of the FAN-RPM */
143 * Useful range for dac is 0-180 for 12V fans and 0-76 for 5V fans. in dac_to_pwm()
146 return clamp_val(255 - (255 * dac) / DAC_LIMIT(v12), 0, 255); in dac_to_pwm()
153 return limit - (limit * pwm) / 255; in pwm_to_dac()
159 struct i2c_client *client = data->client; in max6650_update_device()
163 mutex_lock(&data->update_lock); in max6650_update_device()
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H A Ddme1737.c1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * dme1737.c - Driver for the SMSC DME1737, Asus A8000, SMSC SCH311x, SCH5027,
4 * and SCH5127 Super-I/O chips integrated hardware monitoring
24 #include <linux/hwmon-sysfs.h>
25 #include <linux/hwmon-vid.h>
46 "Include probing of non-standard LPC addresses");
55 /* ---------------------------------------------------------------------
61 * -------- ------------
71 * --------------------------------------------------------------------- */
73 /* Voltages (in) numbered 0-7 (ix) */
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/openbmc/linux/Documentation/ABI/testing/
H A 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
195 Unit: revolution/min (RPM)
203 Unit: revolution/min (RPM)
212 Unit: revolution/min (RPM)
230 Number of tachometer pulses per fan revolution.
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/openbmc/linux/Documentation/devicetree/bindings/hwmon/pmbus/
H A Dmax31785.txt9 - compatible : One of "maxim,max31785" or "maxim,max31785a"
10 - reg : I2C address, one of 0x52, 0x53, 0x54, 0x55.
11 - #address-cells : Must be 1
12 - #size-cells : Must be 0
13 - #thermal-sensor-cells : Should be 1. The device supports:
14 - One internal sensor
15 - Four external I2C digital sensors
16 - Six external thermal diodes
19 - use-stored-presence : Do not treat the devicetree description as canon for
27 ----
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/openbmc/linux/arch/arm64/boot/dts/freescale/
H A Dimx8mp-tqma8mpql-mba8mpxl.dts1 // SPDX-License-Identifier: GPL-2.0-or-later OR MIT
3 * Copyright 2021-2022 TQ-Systems GmbH
4 * Author: Alexander Stein <alexander.stein@tq-group.com>
7 /dts-v1/;
9 #include <dt-bindings/leds/common.h>
10 #include <dt-bindings/net/ti-dp83867.h>
11 #include <dt-bindings/phy/phy-imx8-pcie.h>
12 #include <dt-bindings/pwm/pwm.h>
13 #include "imx8mp-tqma8mpql.dtsi"
16 model = "TQ-Systems i.MX8MPlus TQMa8MPxL on MBa8MPxL";
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/openbmc/linux/arch/arm64/boot/dts/ti/
H A Dk3-am642-tqma64xxl-mbax4xxl.dts1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2021 Texas Instruments Incorporated - https://www.ti.com/
4 * Copyright (c) 2022-2023 TQ-Systems GmbH <linux@ew.tq-group.com>, D-82229 Seefeld, Germany.
7 /dts-v1/;
9 #include <dt-bindings/gpio/gpio.h>
10 #include <dt-bindings/input/input.h>
11 #include <dt-bindings/net/ti-dp83867.h>
12 #include <dt-bindings/phy/phy.h>
13 #include <dt-bindings/pwm/pwm.h>
14 #include "k3-serdes.h"
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