// SPDX-License-Identifier: GPL-2.0-or-later /* * lm75.c - Part of lm_sensors, Linux kernel modules for hardware * monitoring * Copyright (c) 1998, 1999 Frodo Looijaard <[email protected]> */ #include <linux/module.h> #include <linux/init.h> #include <linux/interrupt.h> #include <linux/slab.h> #include <linux/jiffies.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/err.h> #include <linux/of.h> #include <linux/regmap.h> #include <linux/util_macros.h> #include <linux/regulator/consumer.h> #include "lm75.h" /* * This driver handles the LM75 and compatible digital temperature sensors. */ enum lm75_type { … }; /** * struct lm75_params - lm75 configuration parameters. * @config_reg_16bits: Configure register size is 2 bytes. * @set_mask: Bits to set in configuration register when configuring * the chip. * @clr_mask: Bits to clear in configuration register when configuring * the chip. * @default_resolution: Default number of bits to represent the temperature * value. * @resolution_limits: Limit register resolution. Optional. Should be set if * the resolution of limit registers does not match the * resolution of the temperature register. * @resolutions: List of resolutions associated with sample times. * Optional. Should be set if num_sample_times is larger * than 1, and if the resolution changes with sample times. * If set, number of entries must match num_sample_times. * @default_sample_time:Sample time to be set by default. * @num_sample_times: Number of possible sample times to be set. Optional. * Should be set if the number of sample times is larger * than one. * @sample_times: All the possible sample times to be set. Mandatory if * num_sample_times is larger than 1. If set, number of * entries must match num_sample_times. * @alarm: Alarm bit is supported. */ struct lm75_params { … }; /* Addresses scanned */ static const unsigned short normal_i2c[] = …; /* The LM75 registers */ #define LM75_REG_TEMP … #define LM75_REG_CONF … #define LM75_REG_HYST … #define LM75_REG_MAX … #define PCT2075_REG_IDLE … /* Each client has this additional data */ struct lm75_data { … }; /*-----------------------------------------------------------------------*/ static const u8 lm75_sample_set_masks[] = …; #define LM75_SAMPLE_CLEAR_MASK … /* The structure below stores the configuration values of the supported devices. * In case of being supported multiple configurations, the default one must * always be the first element of the array */ static const struct lm75_params device_params[] = …; static inline long lm75_reg_to_mc(s16 temp, u8 resolution) { … } static int lm75_write_config(struct lm75_data *data, u16 set_mask, u16 clr_mask) { … } static int lm75_read_config(struct lm75_data *data) { … } static irqreturn_t lm75_alarm_handler(int irq, void *private) { … } static int lm75_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int lm75_write_temp(struct device *dev, u32 attr, long temp) { … } static int lm75_update_interval(struct device *dev, long val) { … } static int lm75_write_chip(struct device *dev, u32 attr, long val) { … } static int lm75_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t lm75_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static const struct hwmon_channel_info * const lm75_info[] = …; static const struct hwmon_ops lm75_hwmon_ops = …; static const struct hwmon_chip_info lm75_chip_info = …; static bool lm75_is_writeable_reg(struct device *dev, unsigned int reg) { … } static bool lm75_is_volatile_reg(struct device *dev, unsigned int reg) { … } static const struct regmap_config lm75_regmap_config = …; static void lm75_disable_regulator(void *data) { … } static void lm75_remove(void *data) { … } static int lm75_probe(struct i2c_client *client) { … } static const struct i2c_device_id lm75_ids[] = …; MODULE_DEVICE_TABLE(i2c, lm75_ids); static const struct of_device_id __maybe_unused lm75_of_match[] = …; MODULE_DEVICE_TABLE(of, lm75_of_match); #define LM75A_ID … /* Return 0 if detection is successful, -ENODEV otherwise */ static int lm75_detect(struct i2c_client *new_client, struct i2c_board_info *info) { … } #ifdef CONFIG_PM static int lm75_suspend(struct device *dev) { … } static int lm75_resume(struct device *dev) { … } static const struct dev_pm_ops lm75_dev_pm_ops = …; #define LM75_DEV_PM_OPS … #else #define LM75_DEV_PM_OPS … #endif /* CONFIG_PM */ static struct i2c_driver lm75_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
Codebase Browser
linux