Lines Matching +full:signal +full:- +full:to +full:- +full:noise
1 .. SPDX-License-Identifier: GPL-2.0
12 ------------
18 a coordinated approach for different policies to effect the hardware
23 ACPI and PCI devices to expose various features for monitoring and
25 to user space. This allows user space thermal solutions like
26 "Linux Thermal Daemon" to read platform specific thermal and power
27 tables to deliver adequate performance while keeping the system under
31 ----------------------------
38 which should be notified to the firmware when the
43 "42A441D6-AE6A-462b-A84B-4A8CE79027D3" : Passive 1
45 "3A95C389-E4B8-4629-A526-C52C88626BAE" : Active
47 "97C68AE7-15FA-499c-B8C9-5DA81D606E0A" : Critical
49 "63BE270F-1C11-48FD-A6F7-3AF253FF3E2D" : Adaptive performance
51 "5349962F-71E6-431D-9AE8-0A635B710AEE" : Emergency call
53 "9E04115A-AE87-4D1C-9500-0F3E340BFE75" : Passive 2
55 "F5A35014-C209-46A4-993A-EB56DE7530A1" : Power Boss
57 "6ED722A7-9240-48A5-B479-31EEF723D7CF" : Virtual Sensor
59 "16CAF1B7-DD38-40ED-B1C1-1B8A1913D531" : Cooling mode
61 "BE84BABF-C4D4-403D-B495-3128FD44dAC1" : HDC
71 User space daemon write 1 to respond to firmware event
74 firmware calls for user space to respond with imok ACPI
83 Binary thermal table. Refer to
92 ------------------------------------------
96 This device provides IOCTL interface to read standard ACPI
111 ACPI_THERMAL_GET_TRT: Read binary TRT table, length to read is
112 provided via argument to ioctl().
114 ACPI_THERMAL_GET_ART: Read binary ART table, length to read is
115 provided via argument to ioctl().
118 -------------------------
124 --------------------------
130 --------------------------------------------
134 Refer to Documentation/power/powercap/powercap.rst for powercap
168 When set to 1, the power floor of the system in the current
169 configuration has been reached. It needs to be reconfigured to allow
170 power to be reduced any further.
173 When set to 1, enable reading and notification of the power floor
198 All these controls needs admin privilege to update.
206 Update a new temperature target in milli degree celsius for hardware to
210 This attribute ranges from 0 to 7, where 0 represents
211 the most aggressive control to avoid any temperature overshoots, and
215 not necessarily imply a 50% improvement in performance compared to a
219 single user-level manager owns and manages the controls. If multiple
220 user-level software applications attempt to write different targets, it
221 can lead to unexpected behavior.
225 --------------------------------------------
229 frequencies to avoid RF interference with WiFi and 5G.
233 with very sensitive wireless receivers such as Wi-Fi and cellular that
235 methods is requesting SOC integrated VR (IVR) switching frequency to a
236 small % and shift away the switching noise harmonic interference from
237 radio channels. OEM or ODMs can use the driver to control SOC IVR
243 While shifting the frequencies additional clock noise can be introduced,
245 to reduce the clock noise to meet regulatory compliance. This spreading
246 % increases bandwidth of signal transmission and hence reduces the
247 effects of interference, noise and signal fading.
250 at the data rates. Similar to IVR control mechanism, Intel offers a
254 PC ODMs enable this feature (real time DDR RFI Mitigation referred to as
255 DDR-RFIM) for Wi-Fi from BIOS.
263 The VCO reference code is an 11-bit field and controls the FIVR
264 switching frequency. This is the 3-bit LSB field.
267 The VCO reference code is an 11-bit field and controls the FIVR
268 switching frequency. This is the 8-bit MSB field.
290 value 1. Self reset to 0 after operation.
350 ----------------------------------------
352 Refer to Documentation/ABI/testing/sysfs-platform-dptf
355 ----------------------------------------
357 Refer to Documentation/admin-guide/acpi/fan_performance_states.rst
360 ----------------------------------------
363 workload type and passing hints regarding it to the OS. A special sysfs
364 interface is provided to allow user space to obtain workload type hints from
376 Enable firmware to send workload type hints to user space.
383 The delay is rounded up to the nearest power of 2 to simplify firmware
394 0 - Idle: System performs no tasks, power and idle residency are
402 of time, with very few to no periods of idleness, which will