kernel/linux.git/drivers/hwmon/coretemp.c, branch v6.12.80

hwmon: (coretemp) Extend the bitmask to read temperature to 0xff

2024-04-28T17:08:43+00:00

The Intel Software Development manual defines the temperature digital readout as the bits [22:16] of the IA32_[PACKAGE]_THERM_STATUS registers. Bit 23 is specified as reserved. In recent processors, however, the temperature digital readout uses bits [23:16]. In those processors, using the bitmask 0x7f would lead to incorrect readings if the temperature deviates from TjMax by more than 127 degrees Celsius. Although not guaranteed, bit 23 is likely to be 0 in processors from a few generations ago. The temperature reading would still be correct in those processors when using a 0xff bitmask. Model-specific provisions can be made for older processors in which bit 23 is not 0 should the need arise. Signed-off-by: Ricardo Neri Link: https://lore.kernel.org/r/20240425171311.19519-4-ricardo.neri-calderon@linux.intel.com Signed-off-by: Guenter Roeck

Merge tag 'hwmon-for-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

2024-03-13T18:26:58+00:00

Pull hwmon updates from Guenter Roeck: "New drivers: - Amphenol ChipCap 2 - ASPEED g6 PWM/Fan tach - Astera Labs PT5161L retimer - ASUS ROG RYUJIN II 360 AIO cooler - LTC4282 - Microsoft Surface devices - MPS MPQ8785 Synchronous Step-Down Converter - NZXT Kraken X and Z series AIO CPU coolers Additional chip support in existing drivers: - Ayaneo Air Plus 7320u (oxp-sensors) - INA260 (ina2xx) - XPS 9315 (dell-smm) - MSI customer ID (nct6683) Devicetree bindings updates: - Common schema for hardware monitoring devices - Common schema for fans - Update chip descriptions to use common schema - Document regulator properties in several drivers - Explicit bindings for infineon buck converters Other improvements: - Replaced rbtree with maple tree register cache in several drivers - Added support for humidity min/max alarm and volatage fault attributes to hwmon core - Dropped non-functional I2C_CLASS_HWMON support for drivers w/o detect() - Dropped obsolete and redundant entried from MAINTAINERS - Cleaned up axi-fan-control and coretemp drivers - Minor fixes and improvements in several other drivers" * tag 'hwmon-for-v6.9' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (70 commits) hwmon: (dell-smm) Add XPS 9315 to fan control whitelist hwmon: (aspeed-g6-pwm-tacho): Support for ASPEED g6 PWM/Fan tach dt-bindings: hwmon: Support Aspeed g6 PWM TACH Control dt-bindings: hwmon: fan: Add fan binding to schema dt-bindings: hwmon: tda38640: Add interrupt & regulator properties hwmon: (amc6821) add of_match table dt-bindings: hwmon: lm75: use common hwmon schema hwmon: (sis5595) drop unused DIV_TO_REG function dt-bindings: hwmon: reference common hwmon schema dt-bindings: hwmon: lltc,ltc4286: use common hwmon schema dt-bindings: hwmon: adi,adm1275: use common hwmon schema dt-bindings: hwmon: ti,ina2xx: use common hwmon schema dt-bindings: hwmon: add common properties hwmon: (pmbus/ir38064) Use PMBUS_REGULATOR_ONE to declare regulator hwmon: (pmbus/lm25066) Use PMBUS_REGULATOR_ONE to declare regulator hwmon: (pmbus/tda38640) Use PMBUS_REGULATOR_ONE to declare regulator regulator: dt-bindings: promote infineon buck converters to their own binding dt-bindings: hwmon/pmbus: ti,lm25066: document regulators dt-bindings: hwmon: nuvoton,nct6775: Add compatible value for NCT6799 MAINTAINERS: Drop redundant hwmon entries ...

hwmon: (coretemp) Use dynamic allocated memory for core temp_data

2024-02-25T20:37:37+00:00

The total memory needed for saving per core temperature data depends on the number of cores in a package. Using static allocated memory wastes memories on systems with low per package core count. Improve the code to use dynamic allocated memory so that it can be improved further when per package core count information becomes available. No functional change intended. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-12-rui.zhang@intel.com [groeck: Fixed continuation line alignment] Signed-off-by: Guenter Roeck

hwmon: (coretemp) Remove redundant temp_data->is_pkg_data

2024-02-25T20:37:37+00:00

temp_data->index saves the index in pdata->core_data[]. It is not used by package temp_data. Use temp_data->index as the indicator of package temp_data and remove redundant temp_data->is_pkg_data. No functional change. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-11-rui.zhang@intel.com Signed-off-by: Guenter Roeck

hwmon: (coretemp) Split package temp_data and core temp_data

2024-02-25T20:37:37+00:00

Saving package temp_data and core temp_data in one array with different offsets is fragile. Split them and clean up crabbed maths and macros. This also fixes a problem that pdata->core_data[0] was never used. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-10-rui.zhang@intel.com Signed-off-by: Guenter Roeck

hwmon: (coretemp) Abstract core_temp helpers

2024-02-25T20:37:37+00:00

coretemp driver has an obscure and fragile logic for handling package and core temperature data. Place the logic in newly introduced helpers for further optimizations. No functional change. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-9-rui.zhang@intel.com Signed-off-by: Guenter Roeck

hwmon: (coretemp) Remove redundant pdata->cpu_map[]

2024-02-25T20:37:37+00:00

pdata->cpu_map[] saves the mapping between cpu core id and the index in pdata->core_data[]. This is used to find the temp_data structure using cpu_core_id, by traversing the pdata->cpu_map[] array. But the same goal can be achieved by traversing the pdata->core_temp[] array directly. Remove redundant pdata->cpu_map[]. No functional change. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-8-rui.zhang@intel.com Signed-off-by: Guenter Roeck

hwmon: (coretemp) Replace sensor_device_attribute with device_attribute

2024-02-25T20:37:37+00:00

Replace sensor_device_attribute with device_attribute because sensor_device_attribute->index is no longer used. No functional change. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-7-rui.zhang@intel.com Signed-off-by: Guenter Roeck

hwmon: (coretemp) Remove unnecessary dependency of array index

2024-02-25T20:37:37+00:00

When sensor_device_attribute pointer is available, use container_of() to get the temp_data address. This removes the unnecessary dependency of cached index in pdata->core_data[]. No functional change. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-6-rui.zhang@intel.com Signed-off-by: Guenter Roeck

hwmon: (coretemp) Introduce enum for attr index

2024-02-25T20:37:37+00:00

Introduce enum coretemp_attr_index to better describe the index of each sensor attribute. No functional change. Signed-off-by: Zhang Rui Link: https://lore.kernel.org/r/20240202092144.71180-5-rui.zhang@intel.com Signed-off-by: Guenter Roeck