| /openbmc/linux/Documentation/driver-api/thermal/ |
| H A D | sysfs-api.rst | 2 Generic Thermal Sysfs driver How To
15 The generic thermal sysfs provides a set of interfaces for thermal zone
16 devices (sensors) and thermal cooling devices (fan, processor...) to register
17 with the thermal management solution and to be a part of it.
19 This how-to focuses on enabling new thermal zone and cooling devices to
20 participate in thermal management.
21 This solution is platform independent and any type of thermal zone devices
24 The main task of the thermal sysfs driver is to expose thermal zone attributes
26 An intelligent thermal management application can make decisions based on
27 inputs from thermal zone attributes (the current temperature and trip point
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| H A D | power_allocator.rst | 6 -----------
12 point of the thermal zone.
17 thermal zone.
20 --------------
23 Proportional-Integral-Derivative controller (PID controller) with
29 - e = desired_temperature - current_temperature
30 - err_integral is the sum of previous errors
31 - diff_err = e - previous_error
39 | +----------+ +---+
40 | +----->| diff_err |-->| X |------+
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| H A D | x86_pkg_temperature_thermal.rst | 7 * x86: with package level thermal management
14 ---------
16 Intel® 64 and IA-32 Architectures Software Developer’s Manual (Jan, 2013):
17 Chapter 14.6: PACKAGE LEVEL THERMAL MANAGEMENT
20 -----------
22 This driver register CPU digital temperature package level sensor as a thermal
23 zone with maximum two user mode configurable trip points. Number of trip points
25 user mode can receive notification via thermal notification mechanism and can
30 --------------------
31 Each package will register as a thermal zone under /sys/class/thermal.
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| /openbmc/linux/Documentation/ABI/testing/ |
| H A D | sysfs-class-thermal | 1 What: /sys/class/thermal/thermal_zoneX/type
3 Strings which represent the thermal zone type.
4 This is given by thermal zone driver as part of registration.
5 E.g: "acpitz" indicates it's an ACPI thermal device.
12 What: /sys/class/thermal/thermal_zoneX/temp
14 Current temperature as reported by thermal zone (sensor).
20 What: /sys/class/thermal/thermal_zoneX/mode
24 currently managing the thermal zone. It can be either default
28 enable Kernel Thermal management.
30 Preventing kernel thermal zone driver actions upon
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| /openbmc/linux/Documentation/devicetree/bindings/thermal/ |
| H A D | thermal-zones.yaml | 1 # SPDX-License-Identifier: (GPL-2.0)
4 ---
5 $id: http://devicetree.org/schemas/thermal/thermal-zones.yaml#
6 $schema: http://devicetree.org/meta-schemas/base.yaml#
8 title: Thermal zone
11 - Amit Kucheria <amitk@kernel.org>
14 Thermal management is achieved in devicetree by describing the sensor hardware
15 and the software abstraction of cooling devices and thermal zones required to
16 take appropriate action to mitigate thermal overloads.
18 The following node types are used to completely describe a thermal management
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| H A D | rcar-thermal.yaml | 1 # SPDX-License-Identifier: GPL-2.0-only
4 ---
5 $id: http://devicetree.org/schemas/thermal/rcar-thermal.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: Renesas R-Car Thermal
11 - Niklas Söderlund <niklas.soderlund@ragnatech.se>
16 - items:
17 - enum:
18 - renesas,thermal-r8a73a4 # R-Mobile APE6
19 - renesas,thermal-r8a7779 # R-Car H1
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| /openbmc/linux/drivers/thermal/ |
| H A D | da9062-thermal.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Thermal device driver for DA9062 and DA9061
7 /* When over-temperature is reached, an interrupt from the device will be
11 * implementation of the thermal driver will include a .notify() function
14 * These uevents are intended to indicate non-invasive temperature control
17 * the IRQ is re-enabled so the start of a new over-temperature event can
27 #include <linux/thermal.h>
53 struct thermal_zone_device *zone; member
63 struct da9062_thermal *thermal = container_of(work, in da9062_thermal_poll_on() local
71 ret = regmap_write(thermal->hw->regmap, in da9062_thermal_poll_on()
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| H A D | thermal_core.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * thermal.c - Generic Thermal Management Sysfs support.
18 #include <linux/thermal.h>
43 * Governor section: set of functions to handle thermal governors
45 * Functions to help in the life cycle of thermal governors within
46 * the thermal core and by the thermal governor code.
57 if (!strncasecmp(name, pos->name, THERMAL_NAME_LENGTH)) in __find_governor()
64 * bind_previous_governor() - bind the previous governor of the thermal zone
68 * Register the previous governor of the thermal zone after a new
74 if (tz->governor && tz->governor->bind_to_tz) { in bind_previous_governor()
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| H A D | thermal_of.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * of-thermal.c - Generic Thermal Management device tree support.
15 #include <linux/thermal.h>
32 return -EINVAL; in of_find_trip_id()
47 i = -ENXIO; in of_find_trip_id()
55 * It maps 'enum thermal_trip_type' found in include/linux/thermal.h
66 * thermal_of_get_trip_type - Get phy mode for given device_node
91 return -ENODEV; in thermal_of_get_trip_type()
105 trip->temperature = prop; in thermal_of_populate_trip()
112 trip->hysteresis = prop; in thermal_of_populate_trip()
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| H A D | thermal_acpi.c | 1 // SPDX-License-Identifier: GPL-2.0
6 * Library routines for populating a generic thermal trip point structure
15 * Minimum temperature for full military grade is 218°K (-55°C) and
30 status = acpi_evaluate_integer(adev->handle, obj_name, NULL, &temp); in thermal_acpi_trip_temp()
32 acpi_handle_debug(adev->handle, "%s evaluation failed\n", obj_name); in thermal_acpi_trip_temp()
33 return -ENODATA; in thermal_acpi_trip_temp()
39 acpi_handle_debug(adev->handle, "%s result %llu out of range\n", in thermal_acpi_trip_temp()
48 * thermal_acpi_active_trip_temp - Retrieve active trip point temperature
49 * @adev: Target thermal zone ACPI device object.
50 * @id: Active cooling level (0 - 9).
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| H A D | thermal_helpers.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * thermal_helpers.c - helper functions to handle thermal devices
27 struct thermal_trip *trip = tz->trips ? &tz->trips[trip_index] : NULL; in get_tz_trend()
30 if (tz->emul_temperature || !tz->ops->get_trend || in get_tz_trend()
31 tz->ops->get_trend(tz, trip, &trend)) { in get_tz_trend()
32 if (tz->temperature > tz->last_temperature) in get_tz_trend()
34 else if (tz->temperature < tz->last_temperature) in get_tz_trend()
51 mutex_lock(&tz->lock); in get_thermal_instance()
52 mutex_lock(&cdev->lock); in get_thermal_instance()
54 trip = &tz->trips[trip_index]; in get_thermal_instance()
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| H A D | gov_power_allocator.c | 1 // SPDX-License-Identifier: GPL-2.0
12 #include <linux/thermal.h>
19 #define INVALID_TRIP -1
26 * mul_frac() - multiply two fixed-point numbers
30 * Return: the result of multiplying two fixed-point numbers. The
31 * result is also a fixed-point number.
39 * div_frac() - divide two fixed-point numbers
43 * Return: the result of dividing two fixed-point numbers. The
44 * result is also a fixed-point number.
52 * struct power_allocator_params - parameters for the power allocator governor
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| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
3 # Generic thermal drivers configuration
6 menuconfig THERMAL config
7 bool "Thermal drivers"
9 Thermal drivers offer a generic mechanism for
10 thermal management. Usually it's made up of one or more thermal
12 Each thermal zone contains its own temperature, trip points,
14 All platforms with ACPI or Open Firmware thermal support can use
18 if THERMAL
21 bool "Thermal netlink management"
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| H A D | rcar_gen3_thermal.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * R-Car Gen3 THS thermal sensor driver
17 #include <linux/thermal.h>
68 /* Structure for thermal temperature calculation */
85 struct thermal_zone_device *zone; member
102 return ioread32(tsc->base + reg); in rcar_gen3_thermal_read()
108 iowrite32(data, tsc->base + reg); in rcar_gen3_thermal_write()
114 * [reg] = [temp] * a + b => [temp] = ([reg] - b) / a
137 #define TJ_3 -41
149 tsc->tj_t = (FIXPT_INT((priv->ptat[1] - priv->ptat[2]) * (ths_tj_1 - TJ_3)) in rcar_gen3_thermal_calc_coefs()
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| H A D | rcar_thermal.c | 1 // SPDX-License-Identifier: GPL-2.0
3 * R-Car THS/TSC thermal sensor driver
20 #include <linux/thermal.h>
92 struct thermal_zone_device *zone; member
101 list_for_each_entry(pos, &common->head, list)
104 #define rcar_priv_to_dev(priv) ((priv)->common->dev)
105 #define rcar_has_irq_support(priv) ((priv)->common->base)
106 #define rcar_id_to_shift(priv) ((priv)->id * 8)
110 .compatible = "renesas,rcar-thermal",
114 .compatible = "renesas,rcar-gen2-thermal",
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| /openbmc/linux/include/uapi/linux/ |
| H A D | thermal.h | 1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
20 #define THERMAL_GENL_FAMILY_NAME "thermal"
53 #define THERMAL_GENL_ATTR_MAX (__THERMAL_GENL_ATTR_MAX - 1)
59 #define THERMAL_GENL_SAMPLING_MAX (__THERMAL_GENL_SAMPLING_MAX - 1)
64 THERMAL_GENL_EVENT_TZ_CREATE, /* Thermal zone creation */
65 THERMAL_GENL_EVENT_TZ_DELETE, /* Thermal zone deletion */
66 THERMAL_GENL_EVENT_TZ_DISABLE, /* Thermal zone disabled */
67 THERMAL_GENL_EVENT_TZ_ENABLE, /* Thermal zone enabled */
73 THERMAL_GENL_EVENT_CDEV_ADD, /* Cdev bound to the thermal zone */
80 #define THERMAL_GENL_EVENT_MAX (__THERMAL_GENL_EVENT_MAX - 1)
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| /openbmc/linux/include/linux/ |
| H A D | thermal.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
3 * thermal.h ($Revision: 0 $)
18 #include <uapi/linux/thermal.h>
21 #define THERMAL_CSTATE_INVALID -1UL
30 #define THERMAL_TEMP_INVALID -274000
43 /* Thermal notification reason */
49 THERMAL_DEVICE_DOWN, /* Thermal device is down */
50 THERMAL_DEVICE_UP, /* Thermal device is up after a down event */
52 THERMAL_TABLE_CHANGED, /* Thermal table(s) changed */
57 * struct thermal_trip - representation of a point in temperature domain
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| /openbmc/linux/tools/thermal/tmon/ |
| H A D | tmon.8 | 2 # SPDX-License-Identifier: GPL-2.0
4 \fBtmon\fP - A monitoring and testing tool for Linux kernel thermal subsystem
12 \fBtmon \fP can be used to visualize thermal relationship and
13 real-time thermal data; tune
14 and test cooling devices and sensors; collect thermal data for offline
21 1. Thermal relationships:
22 - show thermal zone information
23 - show cooling device information
24 - show trip point binding within each thermal zone
25 - show trip point and cooling device instance bindings
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| /openbmc/linux/drivers/thermal/intel/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
11 enforce idle time which results in more package C-state residency. The
12 user interface is exposed via generic thermal framework.
23 tristate "X86 package temperature thermal driver"
31 thermal zone. Each package will have its own thermal zone. There are
32 two trip points which can be set by user to get notifications via thermal
47 tristate "Intel SoCs DTS thermal driver"
55 thermal zone. There are two trip points. One of the trip point can
56 be set by user mode programs to get notifications via Linux thermal
61 tristate "Intel Quark DTS thermal driver"
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| /openbmc/linux/tools/thermal/thermometer/ |
| H A D | thermometer.8 | 2 # SPDX-License-Identifier: GPL-2.0
4 \fBthermometer\fP - A thermal profiling tool
13 \fBthermometer \fP captures the thermal zones temperature at a
21 If no configuration file is specified, then all the thermal zones will
23 the thermal zone names and the desired sampling period. A thermal zone
24 name can be a regular expression to specify a group of thermal zone.
26 The sampling of the different thermal zones will be written into
27 separate files with the thermal zone name. It is possible to specify a
31 Without any parameters, \fBthermometer \fP captures all the thermal
32 zone temperatures every 250ms and write to the current directory the
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| /openbmc/phosphor-pid-control/ |
| H A D | README.md | 1 # phosphor-pid-control
3 This is a daemon running within the OpenBMC environment. It uses a well-defined
5 them within operating conditions. It may require coordination with host-side
10 The BMC will run a daemon that controls the fans by pre-defined zones. The
11 application will use thermal control, such that each defined zone is kept within
12 a range and adjusted based on thermal information provided from locally readable
13 sensors as well as host-provided information over an IPMI OEM command.
16 configuration files or dbus. Each zone will contain at least one fan and at
21 The system will run a control loop for each zone with the attempt to maintain
22 the temperature within that zone within the margin for the devices specified.
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| /openbmc/linux/drivers/thermal/qcom/ |
| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
7 This enables the thermal sysfs driver for the TSENS device. It shows
8 up in Sysfs as a thermal zone with multiple trip points. Disabling the
9 thermal zone device via the mode file results in disabling the sensor.
14 tristate "Qualcomm SPMI PMIC Thermal Monitor ADC5"
19 This enables the thermal driver for the ADC thermal monitoring
20 device. It shows up as a thermal zone with multiple trip points.
21 Thermal client sets threshold temperature for both warm and cool and
29 This enables a thermal sysfs driver for Qualcomm plug-and-play (QPNP)
30 PMIC devices. It shows up in sysfs as a thermal sensor with multiple
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| /openbmc/phosphor-pid-control/pid/ |
| H A D | zone_interface.hpp | 11 * In a Zone you have a set of PIDs which feed each other. Fan PIDs are fed set
12 * points from Thermal PIDs.
19 /** Get Current Zone ID */
22 /** If the zone implementation supports logging, initialize the log. */
24 /** If the zone implementation supports logging, write string to log. */
30 /** Return the list of sensor names in the zone. */
36 /** For each fan input in the zone, read each to update the cachedValue and
40 /** For each thermal input in the zone, read each to update the cachedValue
45 /** For each fan and thermal input in the zone, set the cachedValue to 0 and
46 * set the input as failsafe - to default the zone to failsafe before it
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| /openbmc/linux/tools/thermal/thermal-engine/ |
| H A D | thermal-engine.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Thermal monitoring tool based on the thermal netlink events.
26 #include <thermal.h>
27 #include "thermal-tools.h"
44 tt->id, tt->type, tt->temp, tt->hyst); in show_trip()
53 INFO("temperature: %d\n", tz->temp); in show_temp()
62 INFO("governor: '%s'\n", tz->governor); in show_governor()
69 INFO("thermal zone '%s', id=%d\n", tz->name, tz->id); in show_tz()
71 for_each_thermal_trip(tz->trip, show_trip, NULL); in show_tz()
82 INFO("Thermal zone '%s'/%d created\n", name, tz_id); in tz_create()
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| /openbmc/linux/Documentation/devicetree/bindings/display/ |
| H A D | repaper.txt | 1 Pervasive Displays RePaper branded e-ink displays
4 - compatible: "pervasive,e1144cs021" for 1.44" display
9 - panel-on-gpios: Timing controller power control
10 - discharge-gpios: Discharge control
11 - reset-gpios: RESET pin
12 - busy-gpios: BUSY pin
15 - border-gpios: Border control
18 all mandatory properties described in ../spi/spi-bus.txt must be specified.
21 - pervasive,thermal-zone: name of thermometer's thermal zone
28 #thermal-sensor-cells = <0>;
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