aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/acpi/dptf/dptf_pch_fivr.c (follow)
AgeCommit message (Collapse)AuthorFilesLines
2022-05-25ACPI: DPTF: Support Meteor LakeSumeet Pawnikar1-0/+1
Add Meteor Lake ACPI IDs for DPTF devices. Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-01-17ACPI: DPTF: Support Raptor LakeSrinivas Pandruvada1-0/+1
Add Raptor Lake ACPI IDs for DPTF devices. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-11-24ACPI: DPTF: Update device ID in a commentSumeet Pawnikar1-1/+1
There is a comment in dptf_pch_fivr.c which seemingly was added under the assumption that the PCH FIVR driver would be used on Tiger Lake platforms, but support for Alder Lake has been udded to it by commit 38748bcb940e ("ACPI: DPTF: Support Alder Lake"), so update the comment to cover a broader range of platforms by changing the device ID mentioned by it to INTC10xx. Signed-off-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com> [ rjw: Subject and changelog rewrite ] Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-08-04ACPI: DPTF: Add new PCH FIVR methodsSrinivas Pandruvada1-0/+9
Some additional information is required for updating PCH FIVR values upon WiFi channel changes. New attributes added to the existing sysfs: fivr_switching_freq_mhz : Get the FIVR switching control frequency. Uses ACPI method GFCS. fivr_switching_fault_status: Read the FIVR switching frequency control fault status. Uses ACPI method GFFS. ssc_clock_info : Presents SSC (spread spectrum clock) information for EMI (Electro magnetic interference) control. Use ACPI method GEMI (refer to the description of GEMI method below). GFFS This ACPI method is used to read the FIVR switching frequency control fault status. Bits Description [0:0] Fault status when set to 1 [31:1] Reserved GFCS This ACPI method is used to read the FIVR switching control frequency. Bits Description [11:0] Actual Frequency = value * XTAL_FREQ / 128 [31:12] Reserved GEMI This ACPI method is used to read the programmed register value for EMI (Electro magnetic interference) control. Bits Description [7:0] Sets clock spectrum spread percentage: 0x00=0.2% , 0x3F=10% 1 LSB = 0.1% increase in spread (for settings 0x01 thru 0x1C) 1 LSB = 0.2% increase in spread (for settings 0x1E thru 0x3F) [8] When set to 1, enables spread spectrum clock [9] 0: Triangle mode. FFC frequency walks around the Fcenter in a linear fashion 1: Random walk mode. FFC frequency changes randomly within the SSC (Spread spectrum clock) range [10] 0: No white noise. 1: Add white noise to spread waveform [11] When 1, future writes are ignored. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2021-07-28ACPI: DPTF: Fix reading of attributesSrinivas Pandruvada1-8/+43
The current assumption that methods to read PCH FIVR attributes will return integer, is not correct. There is no good way to return integer as negative numbers are also valid. These read methods return a package of integers. The first integer returns status, which is 0 on success and any other value for failure. When the returned status is zero, then the second integer returns the actual value. This change fixes this issue by replacing acpi_evaluate_integer() with acpi_evaluate_object() and use acpi_extract_package() to extract results. Fixes: 2ce6324eadb01 ("ACPI: DPTF: Add PCH FIVR participant driver") Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Cc: 5.10+ <stable@vger.kernel.org> # 5.10+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-11-10ACPI: DPTF: Support Alder LakeSrinivas Pandruvada1-0/+1
Add Alder Lake ACPI IDs for DPTF devices. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2020-10-16ACPI: DPTF: Fix participant driver namesRafael J. Wysocki1-1/+1
Change the names of DPTF participant drivers to adhere to the sysfs file naming conventions (no spaces present in the name in particular). Fixes: 2ce6324eadb0 ("ACPI: DPTF: Add PCH FIVR participant driver") Fixes: 6256ebd5daf9 ("ACPI / DPTF: Add DPTF power participant driver") Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Acked-by: Borislav Petkov <bp@suse.de>
2020-09-18ACPI: DPTF: Add PCH FIVR participant driverSrinivas Pandruvada1-0/+126
This driver adds support for Dynamic Platform and Thermal Framework (DPTF) PCH (Platform Controller Hub) FIVR (Fully Integrated Voltage Regulator) participant support. This participant is responsible for exposing platform telemetry and control for: freq_mhz_high_clock freq_mhz_low_clock These attributes are used to get and set PCH FIVR switching frequency for thermal and radio frequency interference mitigation. Refer to Documentation/ABI/testing/sysfs-platform-dptf for ABI details. ACPI methods description used in this driver: RFC0: This ACPI method to set PCH FIVR switching frequency when FIVR clock is 19.2MHz or 24MHz. The ACPI method takes a DWORD value. GFC0: This ACPI method to get PCH FIVR switching frequency when FIVR clock is 19.2MHz or 24MHz. RFC1: This ACPI method to set PCH FIVR switching frequency when FIVR clock is 38.4MHz. The ACPI method takes a DWORD value. GFC1: This ACPI method to get PCH FIVR switching frequency when FIVR clock is 38.4MHz. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.