// SPDX-License-Identifier: GPL-2.0-or-later /* tmp401.c * * Copyright (C) 2007,2008 Hans de Goede <[email protected]> * Preliminary tmp411 support by: * Gabriel Konat, Sander Leget, Wouter Willems * Copyright (C) 2009 Andre Prendel <[email protected]> * * Cleanup and support for TMP431 and TMP432 by Guenter Roeck * Copyright (c) 2013 Guenter Roeck <[email protected]> */ /* * Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC. * * Note this IC is in some aspect similar to the LM90, but it has quite a * few differences too, for example the local temp has a higher resolution * and thus has 16 bits registers for its value and limit instead of 8 bits. */ #include <linux/bitops.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/hwmon.h> #include <linux/init.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[] = …; enum chips { … }; /* * The TMP401 registers, note some registers have different addresses for * reading and writing */ #define TMP401_STATUS … #define TMP401_CONFIG … #define TMP401_CONVERSION_RATE … #define TMP4XX_N_FACTOR_REG … #define TMP43X_BETA_RANGE … #define TMP401_TEMP_CRIT_HYST … #define TMP401_MANUFACTURER_ID_REG … #define TMP401_DEVICE_ID_REG … static const u8 TMP401_TEMP_MSB[7][3] = …; /* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */ static const u8 TMP432_STATUS_REG[] = …; /* Flags */ #define TMP401_CONFIG_RANGE … #define TMP401_CONFIG_SHUTDOWN … #define TMP401_STATUS_LOCAL_CRIT … #define TMP401_STATUS_REMOTE_CRIT … #define TMP401_STATUS_REMOTE_OPEN … #define TMP401_STATUS_REMOTE_LOW … #define TMP401_STATUS_REMOTE_HIGH … #define TMP401_STATUS_LOCAL_LOW … #define TMP401_STATUS_LOCAL_HIGH … /* On TMP432, each status has its own register */ #define TMP432_STATUS_LOCAL … #define TMP432_STATUS_REMOTE1 … #define TMP432_STATUS_REMOTE2 … /* Manufacturer / Device ID's */ #define TMP401_MANUFACTURER_ID … #define TMP401_DEVICE_ID … #define TMP411A_DEVICE_ID … #define TMP411B_DEVICE_ID … #define TMP411C_DEVICE_ID … #define TMP431_DEVICE_ID … #define TMP432_DEVICE_ID … #define TMP435_DEVICE_ID … /* * Driver data (common to all clients) */ static const struct i2c_device_id tmp401_id[] = …; MODULE_DEVICE_TABLE(i2c, tmp401_id); /* * Client data (each client gets its own) */ struct tmp401_data { … }; /* regmap */ static bool tmp401_regmap_is_volatile(struct device *dev, unsigned int reg) { … } static int tmp401_reg_read(void *context, unsigned int reg, unsigned int *val) { … } static int tmp401_reg_write(void *context, unsigned int reg, unsigned int val) { … } static const struct regmap_config tmp401_regmap_config = …; /* temperature conversion */ static int tmp401_register_to_temp(u16 reg, bool extended) { … } static u16 tmp401_temp_to_register(long temp, bool extended, int zbits) { … } /* hwmon API functions */ static const u8 tmp401_temp_reg_index[] = …; static const u8 tmp401_status_reg_index[] = …; static int tmp401_temp_read(struct device *dev, u32 attr, int channel, long *val) { … } static int tmp401_temp_write(struct device *dev, u32 attr, int channel, long val) { … } static int tmp401_chip_read(struct device *dev, u32 attr, int channel, long *val) { … } static int tmp401_set_convrate(struct regmap *regmap, long val) { … } static int tmp401_chip_write(struct device *dev, u32 attr, int channel, long val) { … } static int tmp401_read(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long *val) { … } static int tmp401_write(struct device *dev, enum hwmon_sensor_types type, u32 attr, int channel, long val) { … } static umode_t tmp401_is_visible(const void *data, enum hwmon_sensor_types type, u32 attr, int channel) { … } static const struct hwmon_ops tmp401_ops = …; /* chip initialization, detect, probe */ static int tmp401_init_client(struct tmp401_data *data) { … } static int tmp401_detect(struct i2c_client *client, struct i2c_board_info *info) { … } static int tmp401_probe(struct i2c_client *client) { … } static const struct of_device_id __maybe_unused tmp4xx_of_match[] = …; MODULE_DEVICE_TABLE(of, tmp4xx_of_match); static struct i2c_driver tmp401_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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