// SPDX-License-Identifier: GPL-2.0-only /* * w83l786ng.c - Linux kernel driver for hardware monitoring * Copyright (c) 2007 Kevin Lo <[email protected]> */ /* * Supports following chips: * * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA * w83l786ng 3 2 2 2 0x7b 0x5ca3 yes no */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/hwmon-sysfs.h> #include <linux/err.h> #include <linux/mutex.h> #include <linux/jiffies.h> /* Addresses to scan */ static const unsigned short normal_i2c[] = …; /* Insmod parameters */ static bool reset; module_param(reset, bool, 0); MODULE_PARM_DESC(…) …; #define W83L786NG_REG_IN_MIN(nr) … #define W83L786NG_REG_IN_MAX(nr) … #define W83L786NG_REG_IN(nr) … #define W83L786NG_REG_FAN(nr) … #define W83L786NG_REG_FAN_MIN(nr) … #define W83L786NG_REG_CONFIG … #define W83L786NG_REG_ALARM1 … #define W83L786NG_REG_ALARM2 … #define W83L786NG_REG_GPIO_EN … #define W83L786NG_REG_MAN_ID2 … #define W83L786NG_REG_MAN_ID1 … #define W83L786NG_REG_CHIP_ID … #define W83L786NG_REG_DIODE … #define W83L786NG_REG_FAN_DIV … #define W83L786NG_REG_FAN_CFG … #define W83L786NG_REG_TOLERANCE … static const u8 W83L786NG_REG_TEMP[2][3] = …; static const u8 W83L786NG_PWM_MODE_SHIFT[] = …; static const u8 W83L786NG_PWM_ENABLE_SHIFT[] = …; /* FAN Duty Cycle, be used to control */ static const u8 W83L786NG_REG_PWM[] = …; static inline u8 FAN_TO_REG(long rpm, int div) { … } #define FAN_FROM_REG(val, div) … /* for temp */ #define TEMP_TO_REG(val) … #define TEMP_FROM_REG(val) … /* * The analog voltage inputs have 8mV LSB. Since the sysfs output is * in mV as would be measured on the chip input pin, need to just * multiply/divide by 8 to translate from/to register values. */ #define IN_TO_REG(val) … #define IN_FROM_REG(val) … #define DIV_FROM_REG(val) … static inline u8 DIV_TO_REG(long val) { … } struct w83l786ng_data { … }; static u8 w83l786ng_read_value(struct i2c_client *client, u8 reg) { … } static int w83l786ng_write_value(struct i2c_client *client, u8 reg, u8 value) { … } static struct w83l786ng_data *w83l786ng_update_device(struct device *dev) { … } /* following are the sysfs callback functions */ #define show_in_reg(reg) … show_in_reg(…) … show_in_reg(…) … show_in_reg(…) … #define store_in_reg(REG, reg) … store_in_reg(…) store_in_reg(…) static struct sensor_device_attribute sda_in_input[] = …; static struct sensor_device_attribute sda_in_min[] = …; static struct sensor_device_attribute sda_in_max[] = …; #define show_fan_reg(reg) … show_fan_reg(fan); show_fan_reg(fan_min); static ssize_t store_fan_min(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr, char *buf) { … } /* * Note: we save and restore the fan minimum here, because its value is * determined in part by the fan divisor. This follows the principle of * least surprise; the user doesn't expect the fan minimum to change just * because the divisor changed. */ static ssize_t store_fan_div(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_fan_input[] = …; static struct sensor_device_attribute sda_fan_min[] = …; static struct sensor_device_attribute sda_fan_div[] = …; /* read/write the temperature, includes measured value and limits */ static ssize_t show_temp(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_temp(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute_2 sda_temp_input[] = …; static struct sensor_device_attribute_2 sda_temp_max[] = …; static struct sensor_device_attribute_2 sda_temp_max_hyst[] = …; #define show_pwm_reg(reg) … show_pwm_reg(…) … show_pwm_reg(…) … show_pwm_reg(…) … static ssize_t store_pwm_mode(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t store_pwm(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t store_pwm_enable(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_pwm[] = …; static struct sensor_device_attribute sda_pwm_mode[] = …; static struct sensor_device_attribute sda_pwm_enable[] = …; /* For Smart Fan I/Thermal Cruise and Smart Fan II */ static ssize_t show_tolerance(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t store_tolerance(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static struct sensor_device_attribute sda_tolerance[] = …; #define IN_UNIT_ATTRS(X) … #define FAN_UNIT_ATTRS(X) … #define TEMP_UNIT_ATTRS(X) … #define PWM_UNIT_ATTRS(X) … #define TOLERANCE_UNIT_ATTRS(X) … static struct attribute *w83l786ng_attrs[] = …; ATTRIBUTE_GROUPS(…); static int w83l786ng_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static void w83l786ng_init_client(struct i2c_client *client) { … } static int w83l786ng_probe(struct i2c_client *client) { … } static const struct i2c_device_id w83l786ng_id[] = …; MODULE_DEVICE_TABLE(i2c, w83l786ng_id); static struct i2c_driver w83l786ng_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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