1597b374af
For hwmon drivers using the hwmon_device_register_with_info() API, it is desirable to have a generic notification mechanism available. This mechanism can be used to notify userspace as well as the thermal subsystem if the driver experiences any events, such as warning or critical alarms. Implement hwmon_notify_event() to provide this mechanism. The function generates a sysfs event and a udev event. If the device is registered with the thermal subsystem and the event is associated with a temperature sensor, also notify the thermal subsystem that a thermal event occurred. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Cc: Maxim Kaurkin <Maxim.Kaurkin@baikalelectronics.ru> Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru> Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Rob Herring <robh+dt@kernel.org> Cc: linux-mips@vger.kernel.org Cc: devicetree@vger.kernel.org Signed-off-by: Guenter Roeck <linux@roeck-us.net>
466 lines
14 KiB
C
466 lines
14 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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hwmon.h - part of lm_sensors, Linux kernel modules for hardware monitoring
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This file declares helper functions for the sysfs class "hwmon",
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for use by sensors drivers.
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Copyright (C) 2005 Mark M. Hoffman <mhoffman@lightlink.com>
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*/
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#ifndef _HWMON_H_
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#define _HWMON_H_
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#include <linux/bitops.h>
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struct device;
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struct attribute_group;
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enum hwmon_sensor_types {
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hwmon_chip,
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hwmon_temp,
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hwmon_in,
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hwmon_curr,
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hwmon_power,
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hwmon_energy,
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hwmon_humidity,
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hwmon_fan,
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hwmon_pwm,
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hwmon_intrusion,
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hwmon_max,
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};
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enum hwmon_chip_attributes {
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hwmon_chip_temp_reset_history,
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hwmon_chip_in_reset_history,
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hwmon_chip_curr_reset_history,
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hwmon_chip_power_reset_history,
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hwmon_chip_register_tz,
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hwmon_chip_update_interval,
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hwmon_chip_alarms,
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hwmon_chip_samples,
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hwmon_chip_curr_samples,
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hwmon_chip_in_samples,
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hwmon_chip_power_samples,
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hwmon_chip_temp_samples,
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};
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#define HWMON_C_TEMP_RESET_HISTORY BIT(hwmon_chip_temp_reset_history)
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#define HWMON_C_IN_RESET_HISTORY BIT(hwmon_chip_in_reset_history)
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#define HWMON_C_CURR_RESET_HISTORY BIT(hwmon_chip_curr_reset_history)
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#define HWMON_C_POWER_RESET_HISTORY BIT(hwmon_chip_power_reset_history)
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#define HWMON_C_REGISTER_TZ BIT(hwmon_chip_register_tz)
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#define HWMON_C_UPDATE_INTERVAL BIT(hwmon_chip_update_interval)
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#define HWMON_C_ALARMS BIT(hwmon_chip_alarms)
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#define HWMON_C_SAMPLES BIT(hwmon_chip_samples)
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#define HWMON_C_CURR_SAMPLES BIT(hwmon_chip_curr_samples)
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#define HWMON_C_IN_SAMPLES BIT(hwmon_chip_in_samples)
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#define HWMON_C_POWER_SAMPLES BIT(hwmon_chip_power_samples)
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#define HWMON_C_TEMP_SAMPLES BIT(hwmon_chip_temp_samples)
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enum hwmon_temp_attributes {
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hwmon_temp_enable,
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hwmon_temp_input,
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hwmon_temp_type,
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hwmon_temp_lcrit,
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hwmon_temp_lcrit_hyst,
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hwmon_temp_min,
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hwmon_temp_min_hyst,
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hwmon_temp_max,
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hwmon_temp_max_hyst,
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hwmon_temp_crit,
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hwmon_temp_crit_hyst,
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hwmon_temp_emergency,
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hwmon_temp_emergency_hyst,
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hwmon_temp_alarm,
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hwmon_temp_lcrit_alarm,
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hwmon_temp_min_alarm,
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hwmon_temp_max_alarm,
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hwmon_temp_crit_alarm,
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hwmon_temp_emergency_alarm,
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hwmon_temp_fault,
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hwmon_temp_offset,
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hwmon_temp_label,
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hwmon_temp_lowest,
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hwmon_temp_highest,
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hwmon_temp_reset_history,
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};
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#define HWMON_T_ENABLE BIT(hwmon_temp_enable)
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#define HWMON_T_INPUT BIT(hwmon_temp_input)
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#define HWMON_T_TYPE BIT(hwmon_temp_type)
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#define HWMON_T_LCRIT BIT(hwmon_temp_lcrit)
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#define HWMON_T_LCRIT_HYST BIT(hwmon_temp_lcrit_hyst)
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#define HWMON_T_MIN BIT(hwmon_temp_min)
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#define HWMON_T_MIN_HYST BIT(hwmon_temp_min_hyst)
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#define HWMON_T_MAX BIT(hwmon_temp_max)
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#define HWMON_T_MAX_HYST BIT(hwmon_temp_max_hyst)
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#define HWMON_T_CRIT BIT(hwmon_temp_crit)
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#define HWMON_T_CRIT_HYST BIT(hwmon_temp_crit_hyst)
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#define HWMON_T_EMERGENCY BIT(hwmon_temp_emergency)
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#define HWMON_T_EMERGENCY_HYST BIT(hwmon_temp_emergency_hyst)
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#define HWMON_T_ALARM BIT(hwmon_temp_alarm)
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#define HWMON_T_MIN_ALARM BIT(hwmon_temp_min_alarm)
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#define HWMON_T_MAX_ALARM BIT(hwmon_temp_max_alarm)
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#define HWMON_T_CRIT_ALARM BIT(hwmon_temp_crit_alarm)
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#define HWMON_T_LCRIT_ALARM BIT(hwmon_temp_lcrit_alarm)
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#define HWMON_T_EMERGENCY_ALARM BIT(hwmon_temp_emergency_alarm)
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#define HWMON_T_FAULT BIT(hwmon_temp_fault)
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#define HWMON_T_OFFSET BIT(hwmon_temp_offset)
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#define HWMON_T_LABEL BIT(hwmon_temp_label)
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#define HWMON_T_LOWEST BIT(hwmon_temp_lowest)
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#define HWMON_T_HIGHEST BIT(hwmon_temp_highest)
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#define HWMON_T_RESET_HISTORY BIT(hwmon_temp_reset_history)
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enum hwmon_in_attributes {
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hwmon_in_enable,
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hwmon_in_input,
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hwmon_in_min,
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hwmon_in_max,
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hwmon_in_lcrit,
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hwmon_in_crit,
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hwmon_in_average,
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hwmon_in_lowest,
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hwmon_in_highest,
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hwmon_in_reset_history,
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hwmon_in_label,
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hwmon_in_alarm,
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hwmon_in_min_alarm,
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hwmon_in_max_alarm,
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hwmon_in_lcrit_alarm,
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hwmon_in_crit_alarm,
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};
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#define HWMON_I_ENABLE BIT(hwmon_in_enable)
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#define HWMON_I_INPUT BIT(hwmon_in_input)
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#define HWMON_I_MIN BIT(hwmon_in_min)
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#define HWMON_I_MAX BIT(hwmon_in_max)
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#define HWMON_I_LCRIT BIT(hwmon_in_lcrit)
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#define HWMON_I_CRIT BIT(hwmon_in_crit)
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#define HWMON_I_AVERAGE BIT(hwmon_in_average)
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#define HWMON_I_LOWEST BIT(hwmon_in_lowest)
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#define HWMON_I_HIGHEST BIT(hwmon_in_highest)
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#define HWMON_I_RESET_HISTORY BIT(hwmon_in_reset_history)
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#define HWMON_I_LABEL BIT(hwmon_in_label)
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#define HWMON_I_ALARM BIT(hwmon_in_alarm)
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#define HWMON_I_MIN_ALARM BIT(hwmon_in_min_alarm)
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#define HWMON_I_MAX_ALARM BIT(hwmon_in_max_alarm)
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#define HWMON_I_LCRIT_ALARM BIT(hwmon_in_lcrit_alarm)
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#define HWMON_I_CRIT_ALARM BIT(hwmon_in_crit_alarm)
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enum hwmon_curr_attributes {
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hwmon_curr_enable,
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hwmon_curr_input,
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hwmon_curr_min,
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hwmon_curr_max,
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hwmon_curr_lcrit,
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hwmon_curr_crit,
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hwmon_curr_average,
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hwmon_curr_lowest,
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hwmon_curr_highest,
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hwmon_curr_reset_history,
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hwmon_curr_label,
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hwmon_curr_alarm,
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hwmon_curr_min_alarm,
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hwmon_curr_max_alarm,
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hwmon_curr_lcrit_alarm,
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hwmon_curr_crit_alarm,
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};
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#define HWMON_C_ENABLE BIT(hwmon_curr_enable)
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#define HWMON_C_INPUT BIT(hwmon_curr_input)
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#define HWMON_C_MIN BIT(hwmon_curr_min)
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#define HWMON_C_MAX BIT(hwmon_curr_max)
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#define HWMON_C_LCRIT BIT(hwmon_curr_lcrit)
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#define HWMON_C_CRIT BIT(hwmon_curr_crit)
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#define HWMON_C_AVERAGE BIT(hwmon_curr_average)
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#define HWMON_C_LOWEST BIT(hwmon_curr_lowest)
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#define HWMON_C_HIGHEST BIT(hwmon_curr_highest)
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#define HWMON_C_RESET_HISTORY BIT(hwmon_curr_reset_history)
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#define HWMON_C_LABEL BIT(hwmon_curr_label)
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#define HWMON_C_ALARM BIT(hwmon_curr_alarm)
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#define HWMON_C_MIN_ALARM BIT(hwmon_curr_min_alarm)
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#define HWMON_C_MAX_ALARM BIT(hwmon_curr_max_alarm)
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#define HWMON_C_LCRIT_ALARM BIT(hwmon_curr_lcrit_alarm)
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#define HWMON_C_CRIT_ALARM BIT(hwmon_curr_crit_alarm)
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enum hwmon_power_attributes {
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hwmon_power_enable,
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hwmon_power_average,
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hwmon_power_average_interval,
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hwmon_power_average_interval_max,
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hwmon_power_average_interval_min,
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hwmon_power_average_highest,
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hwmon_power_average_lowest,
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hwmon_power_average_max,
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hwmon_power_average_min,
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hwmon_power_input,
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hwmon_power_input_highest,
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hwmon_power_input_lowest,
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hwmon_power_reset_history,
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hwmon_power_accuracy,
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hwmon_power_cap,
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hwmon_power_cap_hyst,
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hwmon_power_cap_max,
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hwmon_power_cap_min,
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hwmon_power_min,
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hwmon_power_max,
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hwmon_power_crit,
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hwmon_power_lcrit,
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hwmon_power_label,
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hwmon_power_alarm,
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hwmon_power_cap_alarm,
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hwmon_power_min_alarm,
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hwmon_power_max_alarm,
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hwmon_power_lcrit_alarm,
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hwmon_power_crit_alarm,
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};
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#define HWMON_P_ENABLE BIT(hwmon_power_enable)
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#define HWMON_P_AVERAGE BIT(hwmon_power_average)
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#define HWMON_P_AVERAGE_INTERVAL BIT(hwmon_power_average_interval)
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#define HWMON_P_AVERAGE_INTERVAL_MAX BIT(hwmon_power_average_interval_max)
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#define HWMON_P_AVERAGE_INTERVAL_MIN BIT(hwmon_power_average_interval_min)
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#define HWMON_P_AVERAGE_HIGHEST BIT(hwmon_power_average_highest)
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#define HWMON_P_AVERAGE_LOWEST BIT(hwmon_power_average_lowest)
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#define HWMON_P_AVERAGE_MAX BIT(hwmon_power_average_max)
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#define HWMON_P_AVERAGE_MIN BIT(hwmon_power_average_min)
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#define HWMON_P_INPUT BIT(hwmon_power_input)
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#define HWMON_P_INPUT_HIGHEST BIT(hwmon_power_input_highest)
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#define HWMON_P_INPUT_LOWEST BIT(hwmon_power_input_lowest)
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#define HWMON_P_RESET_HISTORY BIT(hwmon_power_reset_history)
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#define HWMON_P_ACCURACY BIT(hwmon_power_accuracy)
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#define HWMON_P_CAP BIT(hwmon_power_cap)
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#define HWMON_P_CAP_HYST BIT(hwmon_power_cap_hyst)
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#define HWMON_P_CAP_MAX BIT(hwmon_power_cap_max)
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#define HWMON_P_CAP_MIN BIT(hwmon_power_cap_min)
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#define HWMON_P_MIN BIT(hwmon_power_min)
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#define HWMON_P_MAX BIT(hwmon_power_max)
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#define HWMON_P_LCRIT BIT(hwmon_power_lcrit)
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#define HWMON_P_CRIT BIT(hwmon_power_crit)
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#define HWMON_P_LABEL BIT(hwmon_power_label)
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#define HWMON_P_ALARM BIT(hwmon_power_alarm)
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#define HWMON_P_CAP_ALARM BIT(hwmon_power_cap_alarm)
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#define HWMON_P_MIN_ALARM BIT(hwmon_power_min_alarm)
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#define HWMON_P_MAX_ALARM BIT(hwmon_power_max_alarm)
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#define HWMON_P_LCRIT_ALARM BIT(hwmon_power_lcrit_alarm)
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#define HWMON_P_CRIT_ALARM BIT(hwmon_power_crit_alarm)
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enum hwmon_energy_attributes {
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hwmon_energy_enable,
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hwmon_energy_input,
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hwmon_energy_label,
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};
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#define HWMON_E_ENABLE BIT(hwmon_energy_enable)
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#define HWMON_E_INPUT BIT(hwmon_energy_input)
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#define HWMON_E_LABEL BIT(hwmon_energy_label)
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enum hwmon_humidity_attributes {
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hwmon_humidity_enable,
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hwmon_humidity_input,
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hwmon_humidity_label,
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hwmon_humidity_min,
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hwmon_humidity_min_hyst,
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hwmon_humidity_max,
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hwmon_humidity_max_hyst,
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hwmon_humidity_alarm,
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hwmon_humidity_fault,
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};
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#define HWMON_H_ENABLE BIT(hwmon_humidity_enable)
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#define HWMON_H_INPUT BIT(hwmon_humidity_input)
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#define HWMON_H_LABEL BIT(hwmon_humidity_label)
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#define HWMON_H_MIN BIT(hwmon_humidity_min)
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#define HWMON_H_MIN_HYST BIT(hwmon_humidity_min_hyst)
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#define HWMON_H_MAX BIT(hwmon_humidity_max)
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#define HWMON_H_MAX_HYST BIT(hwmon_humidity_max_hyst)
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#define HWMON_H_ALARM BIT(hwmon_humidity_alarm)
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#define HWMON_H_FAULT BIT(hwmon_humidity_fault)
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enum hwmon_fan_attributes {
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hwmon_fan_enable,
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hwmon_fan_input,
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hwmon_fan_label,
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hwmon_fan_min,
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hwmon_fan_max,
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hwmon_fan_div,
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hwmon_fan_pulses,
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hwmon_fan_target,
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hwmon_fan_alarm,
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hwmon_fan_min_alarm,
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hwmon_fan_max_alarm,
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hwmon_fan_fault,
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};
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#define HWMON_F_ENABLE BIT(hwmon_fan_enable)
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#define HWMON_F_INPUT BIT(hwmon_fan_input)
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#define HWMON_F_LABEL BIT(hwmon_fan_label)
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#define HWMON_F_MIN BIT(hwmon_fan_min)
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#define HWMON_F_MAX BIT(hwmon_fan_max)
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#define HWMON_F_DIV BIT(hwmon_fan_div)
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#define HWMON_F_PULSES BIT(hwmon_fan_pulses)
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#define HWMON_F_TARGET BIT(hwmon_fan_target)
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#define HWMON_F_ALARM BIT(hwmon_fan_alarm)
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#define HWMON_F_MIN_ALARM BIT(hwmon_fan_min_alarm)
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#define HWMON_F_MAX_ALARM BIT(hwmon_fan_max_alarm)
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#define HWMON_F_FAULT BIT(hwmon_fan_fault)
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enum hwmon_pwm_attributes {
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hwmon_pwm_input,
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hwmon_pwm_enable,
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hwmon_pwm_mode,
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hwmon_pwm_freq,
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};
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#define HWMON_PWM_INPUT BIT(hwmon_pwm_input)
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#define HWMON_PWM_ENABLE BIT(hwmon_pwm_enable)
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#define HWMON_PWM_MODE BIT(hwmon_pwm_mode)
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#define HWMON_PWM_FREQ BIT(hwmon_pwm_freq)
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enum hwmon_intrusion_attributes {
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hwmon_intrusion_alarm,
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hwmon_intrusion_beep,
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};
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#define HWMON_INTRUSION_ALARM BIT(hwmon_intrusion_alarm)
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#define HWMON_INTRUSION_BEEP BIT(hwmon_intrusion_beep)
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/**
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* struct hwmon_ops - hwmon device operations
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* @is_visible: Callback to return attribute visibility. Mandatory.
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* Parameters are:
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* @const void *drvdata:
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* Pointer to driver-private data structure passed
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* as argument to hwmon_device_register_with_info().
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* @type: Sensor type
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* @attr: Sensor attribute
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* @channel:
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* Channel number
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* The function returns the file permissions.
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* If the return value is 0, no attribute will be created.
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* @read: Read callback for data attributes. Mandatory if readable
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* data attributes are present.
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* Parameters are:
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* @dev: Pointer to hardware monitoring device
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* @type: Sensor type
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* @attr: Sensor attribute
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* @channel:
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* Channel number
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* @val: Pointer to returned value
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* The function returns 0 on success or a negative error number.
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* @read_string:
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* Read callback for string attributes. Mandatory if string
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* attributes are present.
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* Parameters are:
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* @dev: Pointer to hardware monitoring device
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* @type: Sensor type
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* @attr: Sensor attribute
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* @channel:
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* Channel number
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* @str: Pointer to returned string
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* The function returns 0 on success or a negative error number.
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* @write: Write callback for data attributes. Mandatory if writeable
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* data attributes are present.
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* Parameters are:
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* @dev: Pointer to hardware monitoring device
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* @type: Sensor type
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* @attr: Sensor attribute
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* @channel:
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* Channel number
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* @val: Value to write
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* The function returns 0 on success or a negative error number.
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*/
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struct hwmon_ops {
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umode_t (*is_visible)(const void *drvdata, enum hwmon_sensor_types type,
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u32 attr, int channel);
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int (*read)(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val);
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int (*read_string)(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, const char **str);
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int (*write)(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long val);
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};
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/**
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* Channel information
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* @type: Channel type.
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* @config: Pointer to NULL-terminated list of channel parameters.
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* Use for per-channel attributes.
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*/
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struct hwmon_channel_info {
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enum hwmon_sensor_types type;
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const u32 *config;
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};
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#define HWMON_CHANNEL_INFO(stype, ...) \
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(&(struct hwmon_channel_info) { \
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.type = hwmon_##stype, \
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.config = (u32 []) { \
|
|
__VA_ARGS__, 0 \
|
|
} \
|
|
})
|
|
|
|
/**
|
|
* Chip configuration
|
|
* @ops: Pointer to hwmon operations.
|
|
* @info: Null-terminated list of channel information.
|
|
*/
|
|
struct hwmon_chip_info {
|
|
const struct hwmon_ops *ops;
|
|
const struct hwmon_channel_info **info;
|
|
};
|
|
|
|
/* hwmon_device_register() is deprecated */
|
|
struct device *hwmon_device_register(struct device *dev);
|
|
|
|
struct device *
|
|
hwmon_device_register_with_groups(struct device *dev, const char *name,
|
|
void *drvdata,
|
|
const struct attribute_group **groups);
|
|
struct device *
|
|
devm_hwmon_device_register_with_groups(struct device *dev, const char *name,
|
|
void *drvdata,
|
|
const struct attribute_group **groups);
|
|
struct device *
|
|
hwmon_device_register_with_info(struct device *dev,
|
|
const char *name, void *drvdata,
|
|
const struct hwmon_chip_info *info,
|
|
const struct attribute_group **extra_groups);
|
|
struct device *
|
|
devm_hwmon_device_register_with_info(struct device *dev,
|
|
const char *name, void *drvdata,
|
|
const struct hwmon_chip_info *info,
|
|
const struct attribute_group **extra_groups);
|
|
|
|
void hwmon_device_unregister(struct device *dev);
|
|
void devm_hwmon_device_unregister(struct device *dev);
|
|
|
|
int hwmon_notify_event(struct device *dev, enum hwmon_sensor_types type,
|
|
u32 attr, int channel);
|
|
|
|
/**
|
|
* hwmon_is_bad_char - Is the char invalid in a hwmon name
|
|
* @ch: the char to be considered
|
|
*
|
|
* hwmon_is_bad_char() can be used to determine if the given character
|
|
* may not be used in a hwmon name.
|
|
*
|
|
* Returns true if the char is invalid, false otherwise.
|
|
*/
|
|
static inline bool hwmon_is_bad_char(const char ch)
|
|
{
|
|
switch (ch) {
|
|
case '-':
|
|
case '*':
|
|
case ' ':
|
|
case '\t':
|
|
case '\n':
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#endif
|