// SPDX-License-Identifier: GPL-2.0-or-later /* * amc6821.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * Copyright (C) 2009 T. Mertelj <[email protected]> * * Based on max6650.c: * Copyright (C) 2007 Hans J. Koch <[email protected]> * * Conversion to regmap and with_info API: * Copyright (C) 2024 Guenter Roeck <[email protected]> */ #include <linux/bitfield.h> #include <linux/bitops.h> #include <linux/bits.h> #include <linux/err.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/minmax.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/regmap.h> #include <linux/slab.h> /* * Addresses to scan. */ static const unsigned short normal_i2c[] = …; /* * Insmod parameters */ static int pwminv; /*Inverted PWM output. */ module_param(pwminv, int, 0444); static int init = …; /*Power-on initialization.*/ module_param(init, int, 0444); #define AMC6821_REG_DEV_ID … #define AMC6821_REG_COMP_ID … #define AMC6821_REG_CONF1 … #define AMC6821_REG_CONF2 … #define AMC6821_REG_CONF3 … #define AMC6821_REG_CONF4 … #define AMC6821_REG_STAT1 … #define AMC6821_REG_STAT2 … #define AMC6821_REG_TEMP_LO … #define AMC6821_REG_TDATA_LOW … #define AMC6821_REG_TDATA_HI … #define AMC6821_REG_LTEMP_HI … #define AMC6821_REG_RTEMP_HI … #define AMC6821_REG_LTEMP_LIMIT_MIN … #define AMC6821_REG_LTEMP_LIMIT_MAX … #define AMC6821_REG_RTEMP_LIMIT_MIN … #define AMC6821_REG_RTEMP_LIMIT_MAX … #define AMC6821_REG_LTEMP_CRIT … #define AMC6821_REG_RTEMP_CRIT … #define AMC6821_REG_PSV_TEMP … #define AMC6821_REG_DCY … #define AMC6821_REG_LTEMP_FAN_CTRL … #define AMC6821_REG_RTEMP_FAN_CTRL … #define AMC6821_REG_DCY_LOW_TEMP … #define AMC6821_REG_TACH_LLIMITL … #define AMC6821_REG_TACH_HLIMITL … #define AMC6821_REG_TACH_SETTINGL … #define AMC6821_CONF1_START … #define AMC6821_CONF1_FAN_INT_EN … #define AMC6821_CONF1_FANIE … #define AMC6821_CONF1_PWMINV … #define AMC6821_CONF1_FAN_FAULT_EN … #define AMC6821_CONF1_FDRC0 … #define AMC6821_CONF1_FDRC1 … #define AMC6821_CONF1_THERMOVIE … #define AMC6821_CONF2_PWM_EN … #define AMC6821_CONF2_TACH_MODE … #define AMC6821_CONF2_TACH_EN … #define AMC6821_CONF2_RTFIE … #define AMC6821_CONF2_LTOIE … #define AMC6821_CONF2_RTOIE … #define AMC6821_CONF2_PSVIE … #define AMC6821_CONF2_RST … #define AMC6821_CONF3_THERM_FAN_EN … #define AMC6821_CONF3_REV_MASK … #define AMC6821_CONF4_OVREN … #define AMC6821_CONF4_TACH_FAST … #define AMC6821_CONF4_PSPR … #define AMC6821_CONF4_MODE … #define AMC6821_STAT1_RPM_ALARM … #define AMC6821_STAT1_FANS … #define AMC6821_STAT1_RTH … #define AMC6821_STAT1_RTL … #define AMC6821_STAT1_R_THERM … #define AMC6821_STAT1_RTF … #define AMC6821_STAT1_LTH … #define AMC6821_STAT1_LTL … #define AMC6821_STAT2_RTC … #define AMC6821_STAT2_LTC … #define AMC6821_STAT2_LPSV … #define AMC6821_STAT2_L_THERM … #define AMC6821_STAT2_THERM_IN … #define AMC6821_TEMP_SLOPE_MASK … #define AMC6821_TEMP_LIMIT_MASK … /* * Client data (each client gets its own) */ struct amc6821_data { … }; /* * Return 0 on success or negative error code. * * temps returns set of three temperatures, in °C: * temps[0]: Passive cooling temperature, applies to both channels * temps[1]: Low temperature, start slope calculations * temps[2]: High temperature * * Channel 0: local, channel 1: remote. */ static int amc6821_get_auto_point_temps(struct regmap *regmap, int channel, u8 *temps) { … } static int amc6821_temp_read_values(struct regmap *regmap, u32 attr, int channel, long *val) { … } static int amc6821_read_alarms(struct regmap *regmap, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int amc6821_temp_read(struct device *dev, u32 attr, int channel, long *val) { … } static int amc6821_temp_write(struct device *dev, u32 attr, int channel, long val) { … } static int amc6821_pwm_read(struct device *dev, u32 attr, long *val) { … } static int amc6821_pwm_write(struct device *dev, u32 attr, long val) { … } static int amc6821_fan_read_rpm(struct regmap *regmap, u32 attr, long *val) { … } static int amc6821_fan_read(struct device *dev, u32 attr, long *val) { … } static int amc6821_fan_write(struct device *dev, u32 attr, long val) { … } static ssize_t temp_auto_point_temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t pwm1_auto_point_pwm_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } /* * Set TEMP[0-4] (low temperature) and SLP[0-2] (slope) of local or remote * TEMP-FAN control register. * * Return 0 on success or negative error code. * * Channel 0: local, channel 1: remote */ static inline int set_slope_register(struct regmap *regmap, int channel, u8 *temps) { … } static ssize_t temp_auto_point_temp_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t pwm1_auto_point_pwm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point1_pwm, pwm1_auto_point_pwm, 0); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm1_auto_point_pwm, 1); static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point3_pwm, pwm1_auto_point_pwm, 2); static SENSOR_DEVICE_ATTR_2_RO(temp1_auto_point1_temp, temp_auto_point_temp, 0, 0); static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point2_temp, temp_auto_point_temp, 0, 1); static SENSOR_DEVICE_ATTR_2_RW(temp1_auto_point3_temp, temp_auto_point_temp, 0, 2); static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point1_temp, temp_auto_point_temp, 1, 0); static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point2_temp, temp_auto_point_temp, 1, 1); static SENSOR_DEVICE_ATTR_2_RW(temp2_auto_point3_temp, temp_auto_point_temp, 1, 2); static struct attribute *amc6821_attrs[] = …; ATTRIBUTE_GROUPS(…); static int amc6821_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int amc6821_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t amc6821_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static const struct hwmon_channel_info * const amc6821_info[] = …; static const struct hwmon_ops amc6821_hwmon_ops = …; static const struct hwmon_chip_info amc6821_chip_info = …; /* Return 0 if detection is successful, -ENODEV otherwise */ static int amc6821_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static int amc6821_init_client(struct amc6821_data *data) { … } static bool amc6821_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config amc6821_regmap_config = …; static int amc6821_probe(struct i2c_client *client) { … } static const struct i2c_device_id amc6821_id[] = …; MODULE_DEVICE_TABLE(i2c, amc6821_id); static const struct of_device_id __maybe_unused amc6821_of_match[] = …; MODULE_DEVICE_TABLE(of, amc6821_of_match); static struct i2c_driver amc6821_driver = …; module_i2c_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …;
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