kernel/linux.git/drivers/acpi/dptf, branch v6.12.80

ACPI: DPTF: Add Lunar Lake support

2024-04-08T14:10:27+00:00

Add Lunar Lake ACPI IDs for DPTF devices. Signed-off-by: Sumeet Pawnikar Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Convert to platform remove callback returning void

2024-02-27T14:57:33+00:00

The .remove() callback for a platform driver returns an int which makes many driver authors wrongly assume it's possible to do error handling by returning an error code. However the value returned is ignored (apart from emitting a warning) and this typically results in resource leaks. To improve here there is a quest to make the remove callback return void. In the first step of this quest all drivers are converted to .remove_new(), which already returns void. Eventually after all drivers are converted, .remove_new() will be renamed to .remove(). Trivially convert these two drivers from always returning zero in the remove callback to the void returning variant. Signed-off-by: Uwe Kleine-König Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Drop stale link from Kconfig help

2022-09-28T15:26:25+00:00

The web site pointed to from the DPTF Kconfig help is not accessible any more, so drop the link to it from there. Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Support Meteor Lake

2022-05-25T13:37:07+00:00

Add Meteor Lake ACPI IDs for DPTF devices. Signed-off-by: Sumeet Pawnikar Reviewed-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Add support for high frequency impedance notification

2022-05-06T18:51:42+00:00

Add high frequency impedance notification support under DPTF. This returns high frequency impedance value that can be obtained from battery fuel gauge whenever there is change over a threshold. Also, corrected the typo from IMPEDANCED_CHNGED to IMPEDANCE_CHANGED. Signed-off-by: Sumeet Pawnikar Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Correct description of INT3407 / INT3532 attributes

2022-04-22T14:57:42+00:00

Remove duplicate comments of PBSS for Battery steady state power and correct the typo for PMAX Maximum platform power. Signed-off-by: Sumeet Pawnikar Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Support Raptor Lake

2022-01-17T18:45:38+00:00

Add Raptor Lake ACPI IDs for DPTF devices. Signed-off-by: Srinivas Pandruvada Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Update device ID in a comment

2021-11-24T16:40:22+00:00

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 [ rjw: Subject and changelog rewrite ] Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Add new PCH FIVR methods

2021-08-04T16:08:50+00:00

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 Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Fix reading of attributes

2021-07-28T16:39:41+00:00

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 Cc: 5.10+ # 5.10+ Signed-off-by: Rafael J. Wysocki