| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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| 2 | /* |
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| 3 | * Measurements Specialties common sensor driver |
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| 4 | * |
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| 5 | * Copyright (c) 2015 Measurement-Specialties |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef _MS_SENSORS_I2C_H |
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| 9 | #define _MS_SENSORS_I2C_H |
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| 10 | |
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| 11 | #include <linux/i2c.h> |
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| 12 | #include <linux/mutex.h> |
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| 13 | |
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| 14 | #define MS_SENSORS_TP_PROM_WORDS_NB 8 |
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| 15 | |
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| 16 | /** |
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| 17 | * struct ms_ht_dev - Humidity/Temperature sensor device structure |
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| 18 | * @client: i2c client |
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| 19 | * @lock: lock protecting the i2c conversion |
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| 20 | * @res_index: index to selected sensor resolution |
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| 21 | */ |
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| 22 | struct ms_ht_dev { |
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| 23 | struct i2c_client *client; |
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| 24 | struct mutex lock; |
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| 25 | u8 res_index; |
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| 26 | }; |
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| 27 | |
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| 28 | /** |
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| 29 | * struct ms_hw_data - Temperature/Pressure sensor hardware data |
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| 30 | * @prom_len: number of words in the PROM |
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| 31 | * @max_res_index: maximum sensor resolution index |
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| 32 | */ |
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| 33 | struct ms_tp_hw_data { |
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| 34 | u8 prom_len; |
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| 35 | u8 max_res_index; |
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| 36 | }; |
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| 37 | |
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| 38 | /** |
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| 39 | * struct ms_tp_dev - Temperature/Pressure sensor device structure |
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| 40 | * @client: i2c client |
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| 41 | * @lock: lock protecting the i2c conversion |
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| 42 | * @prom: array of PROM coefficients used for conversion. Added element |
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| 43 | * for CRC computation |
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| 44 | * @res_index: index to selected sensor resolution |
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| 45 | */ |
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| 46 | struct ms_tp_dev { |
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| 47 | struct i2c_client *client; |
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| 48 | struct mutex lock; |
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| 49 | const struct ms_tp_hw_data *hw; |
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| 50 | u16 prom[MS_SENSORS_TP_PROM_WORDS_NB]; |
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| 51 | u8 res_index; |
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| 52 | }; |
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| 53 | |
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| 54 | int ms_sensors_reset(void *cli, u8 cmd, unsigned int delay); |
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| 55 | int ms_sensors_read_prom_word(void *cli, int cmd, u16 *word); |
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| 56 | int ms_sensors_convert_and_read(void *cli, u8 conv, u8 rd, |
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| 57 | unsigned int delay, u32 *adc); |
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| 58 | int ms_sensors_read_serial(struct i2c_client *client, u64 *sn); |
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| 59 | ssize_t ms_sensors_show_serial(struct ms_ht_dev *dev_data, char *buf); |
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| 60 | ssize_t ms_sensors_write_resolution(struct ms_ht_dev *dev_data, u8 i); |
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| 61 | ssize_t ms_sensors_show_battery_low(struct ms_ht_dev *dev_data, char *buf); |
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| 62 | ssize_t ms_sensors_show_heater(struct ms_ht_dev *dev_data, char *buf); |
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| 63 | ssize_t ms_sensors_write_heater(struct ms_ht_dev *dev_data, |
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| 64 | const char *buf, size_t len); |
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| 65 | int ms_sensors_ht_read_temperature(struct ms_ht_dev *dev_data, |
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| 66 | s32 *temperature); |
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| 67 | int ms_sensors_ht_read_humidity(struct ms_ht_dev *dev_data, |
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| 68 | u32 *humidity); |
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| 69 | int ms_sensors_tp_read_prom(struct ms_tp_dev *dev_data); |
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| 70 | int ms_sensors_read_temp_and_pressure(struct ms_tp_dev *dev_data, |
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| 71 | int *temperature, |
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| 72 | unsigned int *pressure); |
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| 73 | |
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| 74 | #endif /* _MS_SENSORS_I2C_H */ |
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| 75 | |
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