1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 3 /* 4 * ACPI fan device IDs are shared between the fan driver and the device power 5 * management code. 6 * 7 * Add new device IDs before the generic ACPI fan one. 8 */ 9 10 #ifndef _ACPI_FAN_H_ 11 #define _ACPI_FAN_H_ 12 13 #include <linux/kconfig.h> 14 #include <linux/limits.h> 15 16 #define ACPI_FAN_DEVICE_IDS \ 17 {"INT3404", }, /* Fan */ \ 18 {"INTC1044", }, /* Fan for Tiger Lake generation */ \ 19 {"INTC1048", }, /* Fan for Alder Lake generation */ \ 20 {"INTC1063", }, /* Fan for Meteor Lake generation */ \ 21 {"INTC106A", }, /* Fan for Lunar Lake generation */ \ 22 {"INTC10A2", }, /* Fan for Raptor Lake generation */ \ 23 {"INTC10D6", }, /* Fan for Panther Lake generation */ \ 24 {"INTC10FE", }, /* Fan for Wildcat Lake generation */ \ 25 {"PNP0C0B", } /* Generic ACPI fan */ 26 27 #define ACPI_FPS_NAME_LEN 20 28 29 struct acpi_fan_fps { 30 u64 control; 31 u64 trip_point; 32 u64 speed; 33 u64 noise_level; 34 u64 power; 35 char name[ACPI_FPS_NAME_LEN]; 36 struct device_attribute dev_attr; 37 }; 38 39 struct acpi_fan_fif { 40 u8 revision; 41 u8 fine_grain_ctrl; 42 u8 step_size; 43 u8 low_speed_notification; 44 }; 45 46 struct acpi_fan_fst { 47 u64 revision; 48 u64 control; 49 u64 speed; 50 }; 51 52 struct acpi_fan { 53 acpi_handle handle; 54 bool acpi4; 55 bool has_fst; 56 struct acpi_fan_fif fif; 57 struct acpi_fan_fps *fps; 58 int fps_count; 59 /* A value of 0 means that trippoint-related functions are not supported */ 60 u32 fan_trip_granularity; 61 #if IS_REACHABLE(CONFIG_HWMON) 62 struct device *hdev; 63 #endif 64 struct thermal_cooling_device *cdev; 65 struct device_attribute fst_speed; 66 struct device_attribute fine_grain_control; 67 }; 68 69 /** 70 * acpi_fan_speed_valid - Check if fan speed value is valid 71 * @speeed: Speed value returned by the ACPI firmware 72 * 73 * Check if the fan speed value returned by the ACPI firmware is valid. This function is 74 * necessary as ACPI firmware implementations can return 0xFFFFFFFF to signal that the 75 * ACPI fan does not support speed reporting. Additionally, some buggy ACPI firmware 76 * implementations return a value larger than the 32-bit integer value defined by 77 * the ACPI specification when using placeholder values. Such invalid values are also 78 * detected by this function. 79 * 80 * Returns: True if the fan speed value is valid, false otherwise. 81 */ 82 static inline bool acpi_fan_speed_valid(u64 speed) 83 { 84 return speed < U32_MAX; 85 } 86 87 /** 88 * acpi_fan_power_valid - Check if fan power value is valid 89 * @power: Power value returned by the ACPI firmware 90 * 91 * Check if the fan power value returned by the ACPI firmware is valid. 92 * See acpi_fan_speed_valid() for details. 93 * 94 * Returns: True if the fan power value is valid, false otherwise. 95 */ 96 static inline bool acpi_fan_power_valid(u64 power) 97 { 98 return power < U32_MAX; 99 } 100 101 int acpi_fan_get_fst(acpi_handle handle, struct acpi_fan_fst *fst); 102 int acpi_fan_create_attributes(struct acpi_device *device); 103 void acpi_fan_delete_attributes(struct acpi_device *device); 104 105 #if IS_REACHABLE(CONFIG_HWMON) 106 int devm_acpi_fan_create_hwmon(struct device *dev); 107 void acpi_fan_notify_hwmon(struct device *dev); 108 #else 109 static inline int devm_acpi_fan_create_hwmon(struct device *dev) { return 0; }; 110 static inline void acpi_fan_notify_hwmon(struct device *dev) { }; 111 #endif 112 113 #endif 114