/* SPDX-License-Identifier: GPL-2.0-only */ /* * Measurements Specialties common sensor driver * * Copyright (c) 2015 Measurement-Specialties */ #ifndef _MS_SENSORS_I2C_H #define _MS_SENSORS_I2C_H #include <linux/i2c.h> #include <linux/mutex.h> #define MS_SENSORS_TP_PROM_WORDS_NB 8 /** * struct ms_ht_dev - Humidity/Temperature sensor device structure * @client: i2c client * @lock: lock protecting the i2c conversion * @res_index: index to selected sensor resolution */ struct ms_ht_dev { struct i2c_client *client; struct mutex lock; u8 res_index; }; /** * struct ms_hw_data - Temperature/Pressure sensor hardware data * @prom_len: number of words in the PROM * @max_res_index: maximum sensor resolution index */ struct ms_tp_hw_data { u8 prom_len; u8 max_res_index; }; /** * struct ms_tp_dev - Temperature/Pressure sensor device structure * @client: i2c client * @lock: lock protecting the i2c conversion * @prom: array of PROM coefficients used for conversion. Added element * for CRC computation * @res_index: index to selected sensor resolution */ struct ms_tp_dev { struct i2c_client *client; struct mutex lock; const struct ms_tp_hw_data *hw; u16 prom[MS_SENSORS_TP_PROM_WORDS_NB]; u8 res_index; }; int ms_sensors_reset(void *cli, u8 cmd, unsigned int delay); int ms_sensors_read_prom_word(void *cli, int cmd, u16 *word); int ms_sensors_convert_and_read(void *cli, u8 conv, u8 rd, unsigned int delay, u32 *adc); int ms_sensors_read_serial(struct i2c_client *client, u64 *sn); ssize_t ms_sensors_show_serial(struct ms_ht_dev *dev_data, char *buf); ssize_t ms_sensors_write_resolution(struct ms_ht_dev *dev_data, u8 i); ssize_t ms_sensors_show_battery_low(struct ms_ht_dev *dev_data, char *buf); ssize_t ms_sensors_show_heater(struct ms_ht_dev *dev_data, char *buf); ssize_t ms_sensors_write_heater(struct ms_ht_dev *dev_data, const char *buf, size_t len); int ms_sensors_ht_read_temperature(struct ms_ht_dev *dev_data, s32 *temperature); int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data, u32 *humidity); int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data); int ms_sensors_read_temp_and_pressure(struct ms_tp_dev *dev_data, int *temperature, unsigned int *pressure); #endif /* _MS_SENSORS_I2C_H */