// SPDX-License-Identifier: GPL-2.0-or-later /* * A hwmon driver for the Analog Devices ADT7470 * Copyright (C) 2007 IBM * * Author: Darrick J. Wong <[email protected]> */ #define pr_fmt(fmt) … #include <linux/module.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/delay.h> #include <linux/log2.h> #include <linux/kthread.h> #include <linux/regmap.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/util_macros.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = …; /* ADT7470 registers */ #define ADT7470_REG_BASE_ADDR … #define ADT7470_REG_TEMP_BASE_ADDR … #define ADT7470_REG_TEMP_MAX_ADDR … #define ADT7470_REG_FAN_BASE_ADDR … #define ADT7470_REG_FAN_MAX_ADDR … #define ADT7470_REG_PWM_BASE_ADDR … #define ADT7470_REG_PWM_MAX_ADDR … #define ADT7470_REG_PWM_MAX_BASE_ADDR … #define ADT7470_REG_PWM_MAX_MAX_ADDR … #define ADT7470_REG_CFG … #define ADT7470_STRT_MASK … #define ADT7470_TEST_MASK … #define ADT7470_FSPD_MASK … #define ADT7470_T05_STB_MASK … #define ADT7470_REG_ALARM1 … #define ADT7470_R1T_ALARM … #define ADT7470_R2T_ALARM … #define ADT7470_R3T_ALARM … #define ADT7470_R4T_ALARM … #define ADT7470_R5T_ALARM … #define ADT7470_R6T_ALARM … #define ADT7470_R7T_ALARM … #define ADT7470_OOL_ALARM … #define ADT7470_REG_ALARM2 … #define ADT7470_R8T_ALARM … #define ADT7470_R9T_ALARM … #define ADT7470_R10T_ALARM … #define ADT7470_FAN1_ALARM … #define ADT7470_FAN2_ALARM … #define ADT7470_FAN3_ALARM … #define ADT7470_FAN4_ALARM … #define ADT7470_REG_TEMP_LIMITS_BASE_ADDR … #define ADT7470_REG_TEMP_LIMITS_MAX_ADDR … #define ADT7470_REG_FAN_MIN_BASE_ADDR … #define ADT7470_REG_FAN_MIN_MAX_ADDR … #define ADT7470_REG_FAN_MAX_BASE_ADDR … #define ADT7470_REG_FAN_MAX_MAX_ADDR … #define ADT7470_REG_PWM_CFG_BASE_ADDR … #define ADT7470_REG_PWM12_CFG … #define ADT7470_PWM2_AUTO_MASK … #define ADT7470_PWM1_AUTO_MASK … #define ADT7470_PWM_AUTO_MASK … #define ADT7470_REG_PWM34_CFG … #define ADT7470_PWM3_AUTO_MASK … #define ADT7470_PWM4_AUTO_MASK … #define ADT7470_REG_PWM_MIN_BASE_ADDR … #define ADT7470_REG_PWM_MIN_MAX_ADDR … #define ADT7470_REG_PWM_TEMP_MIN_BASE_ADDR … #define ADT7470_REG_PWM_TEMP_MIN_MAX_ADDR … #define ADT7470_REG_CFG_2 … #define ADT7470_REG_ACOUSTICS12 … #define ADT7470_REG_ACOUSTICS34 … #define ADT7470_REG_DEVICE … #define ADT7470_REG_VENDOR … #define ADT7470_REG_REVISION … #define ADT7470_REG_ALARM1_MASK … #define ADT7470_REG_ALARM2_MASK … #define ADT7470_REG_PWM_AUTO_TEMP_BASE_ADDR … #define ADT7470_REG_PWM_AUTO_TEMP_MAX_ADDR … #define ADT7470_REG_MAX_ADDR … #define ADT7470_TEMP_COUNT … #define ADT7470_TEMP_REG(x) … #define ADT7470_TEMP_MIN_REG(x) … #define ADT7470_TEMP_MAX_REG(x) … #define ADT7470_FAN_COUNT … #define ADT7470_REG_FAN(x) … #define ADT7470_REG_FAN_MIN(x) … #define ADT7470_REG_FAN_MAX(x) … #define ADT7470_PWM_COUNT … #define ADT7470_REG_PWM(x) … #define ADT7470_REG_PWM_MAX(x) … #define ADT7470_REG_PWM_MIN(x) … #define ADT7470_REG_PWM_TMIN(x) … #define ADT7470_REG_PWM_CFG(x) … #define ADT7470_REG_PWM_AUTO_TEMP(x) … #define ALARM2(x) … #define ADT7470_VENDOR … #define ADT7470_DEVICE … /* datasheet only mentions a revision 2 */ #define ADT7470_REVISION … /* "all temps" according to hwmon sysfs interface spec */ #define ADT7470_PWM_ALL_TEMPS … /* How often do we reread sensors values? (In jiffies) */ #define SENSOR_REFRESH_INTERVAL … /* How often do we reread sensor limit values? (In jiffies) */ #define LIMIT_REFRESH_INTERVAL … /* Wait at least 200ms per sensor for 10 sensors */ #define TEMP_COLLECTION_TIME … /* auto update thing won't fire more than every 2s */ #define AUTO_UPDATE_INTERVAL … /* datasheet says to divide this number by the fan reading to get fan rpm */ #define FAN_PERIOD_TO_RPM(x) … #define FAN_RPM_TO_PERIOD … #define FAN_PERIOD_INVALID … #define FAN_DATA_VALID(x) … /* Config registers 1 and 2 include fields for selecting the PWM frequency */ #define ADT7470_CFG_LF … #define ADT7470_FREQ_MASK … #define ADT7470_FREQ_SHIFT … struct adt7470_data { … }; /* * 16-bit registers on the ADT7470 are low-byte first. The data sheet says * that the low byte must be read before the high byte. */ static inline int adt7470_read_word_data(struct adt7470_data *data, unsigned int reg, unsigned int *val) { … } static inline int adt7470_write_word_data(struct adt7470_data *data, unsigned int reg, unsigned int val) { … } /* Probe for temperature sensors. Assumes lock is held */ static int adt7470_read_temperatures(struct adt7470_data *data) { … } static int adt7470_update_thread(void *p) { … } static int adt7470_update_sensors(struct adt7470_data *data) { … } static int adt7470_update_limits(struct adt7470_data *data) { … } static struct adt7470_data *adt7470_update_device(struct device *dev) { … } static ssize_t auto_update_interval_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t auto_update_interval_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static ssize_t num_temp_sensors_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t num_temp_sensors_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static int adt7470_temp_read(struct device *dev, u32 attr, int channel, long *val) { … } static int adt7470_temp_write(struct device *dev, u32 attr, int channel, long val) { … } static ssize_t alarm_mask_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t alarm_mask_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static int adt7470_fan_read(struct device *dev, u32 attr, int channel, long *val) { … } static int adt7470_fan_write(struct device *dev, u32 attr, int channel, long val) { … } static ssize_t force_pwm_max_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t force_pwm_max_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } /* These are the valid PWM frequencies to the nearest Hz */ static const int adt7470_freq_map[] = …; static int pwm1_freq_get(struct device *dev) { … } static int adt7470_pwm_read(struct device *dev, u32 attr, int channel, long *val) { … } static int pwm1_freq_set(struct device *dev, long freq) { … } static int adt7470_pwm_write(struct device *dev, u32 attr, int channel, long val) { … } static ssize_t pwm_max_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t pwm_max_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static ssize_t pwm_min_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t pwm_min_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static ssize_t pwm_tmax_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t pwm_tmin_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static ssize_t pwm_tmin_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static ssize_t pwm_auto_temp_show(struct device *dev, struct device_attribute *devattr, char *buf) { … } static int cvt_auto_temp(int input) { … } static ssize_t pwm_auto_temp_store(struct device *dev, struct device_attribute *devattr, const char *buf, size_t count) { … } static DEVICE_ATTR_RW(alarm_mask); static DEVICE_ATTR_RW(num_temp_sensors); static DEVICE_ATTR_RW(auto_update_interval); static SENSOR_DEVICE_ATTR_RW(force_pwm_max, force_pwm_max, 0); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_pwm, pwm_min, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_pwm, pwm_min, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_pwm, pwm_min, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_pwm, pwm_min, 3); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point2_pwm, pwm_max, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point2_pwm, pwm_max, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point2_pwm, pwm_max, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point2_pwm, pwm_max, 3); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_point1_temp, pwm_tmin, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_point1_temp, pwm_tmin, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_point1_temp, pwm_tmin, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_point1_temp, pwm_tmin, 3); static SENSOR_DEVICE_ATTR_RO(pwm1_auto_point2_temp, pwm_tmax, 0); static SENSOR_DEVICE_ATTR_RO(pwm2_auto_point2_temp, pwm_tmax, 1); static SENSOR_DEVICE_ATTR_RO(pwm3_auto_point2_temp, pwm_tmax, 2); static SENSOR_DEVICE_ATTR_RO(pwm4_auto_point2_temp, pwm_tmax, 3); static SENSOR_DEVICE_ATTR_RW(pwm1_auto_channels_temp, pwm_auto_temp, 0); static SENSOR_DEVICE_ATTR_RW(pwm2_auto_channels_temp, pwm_auto_temp, 1); static SENSOR_DEVICE_ATTR_RW(pwm3_auto_channels_temp, pwm_auto_temp, 2); static SENSOR_DEVICE_ATTR_RW(pwm4_auto_channels_temp, pwm_auto_temp, 3); static struct attribute *adt7470_attrs[] = …; ATTRIBUTE_GROUPS(…); static int adt7470_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int adt7470_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t adt7470_is_visible(const void *_data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static const struct hwmon_ops adt7470_hwmon_ops = …; static const struct hwmon_channel_info * const adt7470_info[] = …; static const struct hwmon_chip_info adt7470_chip_info = …; /* Return 0 if detection is successful, -ENODEV otherwise */ static int adt7470_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static const struct regmap_config adt7470_regmap_config = …; static int adt7470_probe(struct i2c_client *client) { … } static void adt7470_remove(struct i2c_client *client) { … } static const struct i2c_device_id adt7470_id[] = …; MODULE_DEVICE_TABLE(i2c, adt7470_id); static struct i2c_driver adt7470_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux