// SPDX-License-Identifier: GPL-2.0-only /* * 1-wire client/driver for the Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC * * Author: Renata Sayakhova <[email protected]> * * Based on ds2780_battery drivers */ #include <linux/module.h> #include <linux/slab.h> #include <linux/param.h> #include <linux/pm.h> #include <linux/platform_device.h> #include <linux/power_supply.h> #include <linux/idr.h> #include <linux/w1.h> #include "../../w1/slaves/w1_ds2781.h" /* Current unit measurement in uA for a 1 milli-ohm sense resistor */ #define DS2781_CURRENT_UNITS … /* Charge unit measurement in uAh for a 1 milli-ohm sense resistor */ #define DS2781_CHARGE_UNITS … /* Number of bytes in user EEPROM space */ #define DS2781_USER_EEPROM_SIZE … /* Number of bytes in parameter EEPROM space */ #define DS2781_PARAM_EEPROM_SIZE … struct ds2781_device_info { … }; enum current_types { … }; static const char model[] = …; static const char manufacturer[] = …; static inline struct ds2781_device_info * to_ds2781_device_info(struct power_supply *psy) { … } static inline int ds2781_battery_io(struct ds2781_device_info *dev_info, char *buf, int addr, size_t count, int io) { … } static int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf, int addr, size_t count) { … } static inline int ds2781_read8(struct ds2781_device_info *dev_info, u8 *val, int addr) { … } static int ds2781_read16(struct ds2781_device_info *dev_info, s16 *val, int addr) { … } static inline int ds2781_read_block(struct ds2781_device_info *dev_info, u8 *val, int addr, size_t count) { … } static inline int ds2781_write(struct ds2781_device_info *dev_info, u8 *val, int addr, size_t count) { … } static inline int ds2781_store_eeprom(struct device *dev, int addr) { … } static inline int ds2781_recall_eeprom(struct device *dev, int addr) { … } static int ds2781_save_eeprom(struct ds2781_device_info *dev_info, int reg) { … } /* Set sense resistor value in mhos */ static int ds2781_set_sense_register(struct ds2781_device_info *dev_info, u8 conductance) { … } /* Get RSGAIN value from 0 to 1.999 in steps of 0.001 */ static int ds2781_get_rsgain_register(struct ds2781_device_info *dev_info, u16 *rsgain) { … } /* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */ static int ds2781_set_rsgain_register(struct ds2781_device_info *dev_info, u16 rsgain) { … } static int ds2781_get_voltage(struct ds2781_device_info *dev_info, int *voltage_uV) { … } static int ds2781_get_temperature(struct ds2781_device_info *dev_info, int *temp) { … } static int ds2781_get_current(struct ds2781_device_info *dev_info, enum current_types type, int *current_uA) { … } static int ds2781_get_accumulated_current(struct ds2781_device_info *dev_info, int *accumulated_current) { … } static int ds2781_get_capacity(struct ds2781_device_info *dev_info, int *capacity) { … } static int ds2781_get_status(struct ds2781_device_info *dev_info, int *status) { … } static int ds2781_get_charge_now(struct ds2781_device_info *dev_info, int *charge_now) { … } static int ds2781_get_control_register(struct ds2781_device_info *dev_info, u8 *control_reg) { … } static int ds2781_set_control_register(struct ds2781_device_info *dev_info, u8 control_reg) { … } static int ds2781_battery_get_property(struct power_supply *psy, enum power_supply_property psp, union power_supply_propval *val) { … } static enum power_supply_property ds2781_battery_props[] = …; static ssize_t ds2781_get_pmod_enabled(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ds2781_set_pmod_enabled(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t ds2781_get_sense_resistor_value(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ds2781_set_sense_resistor_value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t ds2781_get_rsgain_setting(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ds2781_set_rsgain_setting(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t ds2781_get_pio_pin(struct device *dev, struct device_attribute *attr, char *buf) { … } static ssize_t ds2781_set_pio_pin(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { … } static ssize_t ds2781_read_param_eeprom_bin(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t ds2781_write_param_eeprom_bin(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static struct bin_attribute ds2781_param_eeprom_bin_attr = …; static ssize_t ds2781_read_user_eeprom_bin(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static ssize_t ds2781_write_user_eeprom_bin(struct file *filp, struct kobject *kobj, struct bin_attribute *bin_attr, char *buf, loff_t off, size_t count) { … } static struct bin_attribute ds2781_user_eeprom_bin_attr = …; static DEVICE_ATTR(pmod_enabled, S_IRUGO | S_IWUSR, ds2781_get_pmod_enabled, ds2781_set_pmod_enabled); static DEVICE_ATTR(sense_resistor_value, S_IRUGO | S_IWUSR, ds2781_get_sense_resistor_value, ds2781_set_sense_resistor_value); static DEVICE_ATTR(rsgain_setting, S_IRUGO | S_IWUSR, ds2781_get_rsgain_setting, ds2781_set_rsgain_setting); static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin, ds2781_set_pio_pin); static struct attribute *ds2781_sysfs_attrs[] = …; static struct bin_attribute *ds2781_sysfs_bin_attrs[] = …; static const struct attribute_group ds2781_sysfs_group = …; static const struct attribute_group *ds2781_sysfs_groups[] = …; static int ds2781_battery_probe(struct platform_device *pdev) { … } static struct platform_driver ds2781_battery_driver = …; module_platform_driver(…) …; MODULE_LICENSE(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_ALIAS(…) …;
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