kernel/linux.git/drivers/acpi/dptf, branch v5.10.78

ACPI: DPTF: Fix reading of attributes

2021-08-04T10:46:39+00:00

commit 41a8457f3f6f829be1f8f8fa7577a46b9b7223ef upstream. 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 Signed-off-by: Greg Kroah-Hartman

ACPI: DPTF: Support Alder Lake

2020-11-10T17:52:51+00:00

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

ACPI: DPTF: Add ACPI_DPTF Kconfig menu

2020-10-16T16:16:39+00:00

Add a Kconfig menu for Intel DPTF (Dynamic Platform and Thermal Framework), put both the existing participant drivers in it and set them to be built as modules by default. While at it, do a few assorted cleanups for a good measure. Signed-off-by: Rafael J. Wysocki Reviewed-by: Srinivas Pandruvada Acked-by: Borislav Petkov

ACPI: DPTF: Fix participant driver names

2020-10-16T16:16:39+00:00

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 Reviewed-by: Srinivas Pandruvada Acked-by: Borislav Petkov

ACPI: DPTF: Add PCH FIVR participant driver

2020-09-18T16:13:56+00:00

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 Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Add battery participant for TigerLake

2020-06-29T12:00:57+00:00

Add DPTF battery participant ACPI ID for platforms based on the Intel TigerLake SoC. Signed-off-by: Srinivas Pandruvada [ rjw: Changelog ] Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Add battery participant driver

2020-05-25T10:05:26+00:00

This driver adds support for Dynamic Platform and Thermal Framework battery participant device support. These attributes are presented via sysfs interface under the platform device for the battery participant: $ls /sys/bus/platform/devices/INT3532:00/dptf_battery current_discharge_capbility_ma max_platform_power_mw no_load_voltage_mv high_freq_impedance_mohm max_steady_state_power_mw Refer to the documentation at Documentation/ABI/testing/sysfs-platform-dptf for details. Here the implementation reuses existing dptf-power.c as the motivation and processing is same. It also shares one ACPI method. Here this change is using participant type, "PTYP" method to identify and do different processing. By using participant type, create/delete either "dptf_power" or "dptf_battery" attribute group and send notifications. The particpant type for for the battery participant is 0x0C. ACPI methods description: PMAX (Intel(R) Dynamic Tuning Platform Max Power Supplied by Battery): This object evaluates to the maximum platform power that can be supported by the battery in milli watts. PBSS (Intel(R) Dynamic Tuning Power Battery Steady State): This object returns the max sustained power for battery in milli watts. RBHF (Intel(R) Dynamic Tuning High Frequency Impedance): This object returns high frequency impedance value that can be obtained from battery fuel gauge. VBNL (Intel(R) Dynamic Tuning No-Load Voltage) This object returns battery instantaneous no-load voltage that can be obtained from battery fuel gauge in milli volts CMPP (Intel(R) Dynamic Tuning Current Discharge Capability) This object returns battery discharge current capability obtained from battery fuel gauge milli amps. Notifications: 0x80: PMAX change. Used to notify Intel(R)Dynamic Tuning Battery participant driver when the PMAX has changed by 250mw. 0x83: PBSS change. Used to notify Intel(R) Dynamic Tuning Battery participant driver when the power source has changed. 0x85: RBHF change. Used to notify Intel(R)Dynamic Tuning Battery participant driver when the RBHF has changed over a threshold by 5mOhm. 0x86: Battery Capability change. Used to notify Intel(R)Dynamic Tuning Battery participant driver when the battery capability has changed. Signed-off-by: Srinivas Pandruvada [ rjw: Subject ] Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Additional sysfs attributes for power participant driver

2020-05-25T10:03:43+00:00

Add two additional attributes to the existing power participant driver: rest_of_platform_power_mw: (RO) Shows the rest of worst case platform power in mW outside of S0C. This will help in power distribution to SoC and rest of the system. For example on a test system, this value is 2.5W with a 15W TDP SoC. Based on the adapter rating (adapter_rating_mw), user space software can decide on proper power allocation to SoC to improve short term performance via powercap/RAPL interface. prochot_confirm: (WO) Confirm EC about a prochot notification. Also userspace is notified via sysfs_notify(), whenever power source or rest of the platform power is changed. So user space can use poll() system call on those attributes. The ACPI methods used in this patch are as follows: PROP This object evaluates to the rest of worst case platform power in mW. Bits: 23:0 Worst case rest of platform power in mW. PBOK PBOK is a method designed to provide a mechanism for OSPM to change power setting before EC can de-assert a PROCHOT from a device. The EC may receive several PROCHOTs, so it has a sequence number attached to PSRC (read via existing attribute "platform_power_source"). Once OSPM takes action for a PSRC change notification, it can call PBOK method to confirm with the sequence number. Bits: 3:0 Power Delivery State Change Sequence number 30 Reserved 31 0 – Not OK to de-assert PROCHOT 1 – OK to de-assert PROCHOT PSRC (Platform Power Source): Not new in this patch but for documentation for new bits This object evaluates to an integer that represents the system power source as well as the power delivery state change sequence number. Bits: 3:0 The current power source as an integer for AC, DC, USB, Wireless. 0 = DC, 1 = AC, 2 = USB, 3 = Wireless Charging 7:4 Power Delivery State Change Sequence Number. Default value is 0 Notifications: 0x81: (Power State Change) Used to notify when the power source has changed. 0x84: (PROP change) Used to notify when the platform rest of power has changed. Signed-off-by: Srinivas Pandruvada [ rjw: Subject, minor ABI documentation edit ] Signed-off-by: Rafael J. Wysocki

ACPI: Update Tiger Lake ACPI device IDs

2020-04-01T11:20:21+00:00

Tiger Lake's new unique ACPI device IDs for DPTF and fan drivers are not valid as the IDs are missing 'C'. Fix the IDs by updating them. After the update, the new IDs should now look like INT1047 --> INTC1047 INT1040 --> INTC1040 INT1043 --> INTC1043 INT1044 --> INTC1044 Fixes: 55cfe6a5c582 ("ACPI: DPTF: Add Tiger Lake ACPI device IDs") Fixes: c248dfe7e0ca ("ACPI: fan: Add Tiger Lake ACPI device ID") Suggested-by: Srinivas Pandruvada Signed-off-by: Gayatri Kammela Reviewed-by: Andy Shevchenko Signed-off-by: Rafael J. Wysocki

ACPI: DPTF: Add Tiger Lake ACPI device IDs

2019-12-19T21:51:55+00:00

Tiger Lake has new unique ACPI device IDs that need to be added to the DPTF drivers to support it. Signed-off-by: Gayatri Kammela [ rjw: Subject & changelog ] Signed-off-by: Rafael J. Wysocki