driver-api/thermal/intel_dptf.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 Intel(R) Dynamic Platform and Thermal Framework Sysfs Interface
12 ------------
14 Intel(R) Dynamic Platform and Thermal Framework (DPTF) is a platform
15 level hardware/software solution for power and thermal management.
17 As a container for multiple power/thermal technologies, DPTF provides
26 "Linux Thermal Daemon" to read platform specific thermal and power
31 ----------------------------
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
92 ------------------------------------------
118 -------------------------
124 --------------------------
130 --------------------------------------------
134 Refer to Documentation/power/powercap/powercap.rst for powercap
141 	Power limit increment/decrements for Intel RAPL constraint 0 power limit
156 	Power limit increment/decrements for Intel RAPL constraint 1 power limit
185 --------------------------------------------
191 Switching voltage regulators (VR) generate radiated EMI or RFI at the
193 with very sensitive wireless receivers such as Wi-Fi and cellular that
195 methods is requesting SOC integrated VR (IVR) switching frequency to a
196 small % and shift away the switching noise harmonic interference from
200 Some products use DLVR instead of FIVR as switching voltage regulator.
209 DRAM devices of DDR IO interface and their power plane can generate EMI
212 are met: there is strong RFI interference because of DDR; CPU power
215 DDR-RFIM) for Wi-Fi from BIOS.
223 	The VCO reference code is an 11-bit field and controls the FIVR
224 	switching frequency. This is the 3-bit LSB field.
227 	The VCO reference code is an 11-bit field and controls the FIVR
228 	switching frequency. This is the 8-bit MSB field.
238 	current FIVR switching frequency
309 DPTF Power supply and Battery Interface
310 ----------------------------------------
312 Refer to Documentation/ABI/testing/sysfs-platform-dptf
315 ----------------------------------------
317 Refer to Documentation/admin-guide/acpi/fan_performance_states.rst