1 /* 2 * Measurements Specialties common sensor driver 3 * 4 * Copyright (c) 2015 Measurement-Specialties 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifndef _MS_SENSORS_I2C_H 12 #define _MS_SENSORS_I2C_H 13 14 #include <linux/i2c.h> 15 #include <linux/mutex.h> 16 17 #define MS_SENSORS_TP_PROM_WORDS_NB 7 18 19 /** 20 * struct ms_ht_dev - Humidity/Temperature sensor device structure 21 * @client: i2c client 22 * @lock: lock protecting the i2c conversion 23 * @res_index: index to selected sensor resolution 24 */ 25 struct ms_ht_dev { 26 struct i2c_client *client; 27 struct mutex lock; 28 u8 res_index; 29 }; 30 31 /** 32 * struct ms_tp_dev - Temperature/Pressure sensor device structure 33 * @client: i2c client 34 * @lock: lock protecting the i2c conversion 35 * @prom: array of PROM coefficients used for conversion. Added element 36 * for CRC computation 37 * @res_index: index to selected sensor resolution 38 */ 39 struct ms_tp_dev { 40 struct i2c_client *client; 41 struct mutex lock; 42 u16 prom[MS_SENSORS_TP_PROM_WORDS_NB + 1]; 43 u8 res_index; 44 }; 45 46 int ms_sensors_reset(void *cli, u8 cmd, unsigned int delay); 47 int ms_sensors_read_prom_word(void *cli, int cmd, u16 *word); 48 int ms_sensors_convert_and_read(void *cli, u8 conv, u8 rd, 49 unsigned int delay, u32 *adc); 50 int ms_sensors_read_serial(struct i2c_client *client, u64 *sn); 51 ssize_t ms_sensors_show_serial(struct ms_ht_dev *dev_data, char *buf); 52 ssize_t ms_sensors_write_resolution(struct ms_ht_dev *dev_data, u8 i); 53 ssize_t ms_sensors_show_battery_low(struct ms_ht_dev *dev_data, char *buf); 54 ssize_t ms_sensors_show_heater(struct ms_ht_dev *dev_data, char *buf); 55 ssize_t ms_sensors_write_heater(struct ms_ht_dev *dev_data, 56 const char *buf, size_t len); 57 int ms_sensors_ht_read_temperature(struct ms_ht_dev *dev_data, 58 s32 *temperature); 59 int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data, 60 u32 *humidity); 61 int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data); 62 int ms_sensors_read_temp_and_pressure(struct ms_tp_dev *dev_data, 63 int *temperature, 64 unsigned int *pressure); 65 66 #endif /* _MS_SENSORS_I2C_H */ 67