1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * STMicroelectronics hts221 sensor driver 4 * 5 * Copyright 2016 STMicroelectronics Inc. 6 * 7 * Lorenzo Bianconi <lorenzo.bianconi@st.com> 8 */ 9 10 #ifndef HTS221_H 11 #define HTS221_H 12 13 #define HTS221_DEV_NAME "hts221" 14 15 #include <linux/iio/iio.h> 16 17 enum hts221_sensor_type { 18 HTS221_SENSOR_H, 19 HTS221_SENSOR_T, 20 HTS221_SENSOR_MAX, 21 }; 22 23 struct hts221_sensor { 24 u8 cur_avg_idx; 25 int slope, b_gen; 26 }; 27 28 struct hts221_hw { 29 const char *name; 30 struct device *dev; 31 struct regmap *regmap; 32 33 struct iio_trigger *trig; 34 int irq; 35 36 struct hts221_sensor sensors[HTS221_SENSOR_MAX]; 37 38 bool enabled; 39 u8 odr; 40 /* Ensure natural alignment of timestamp */ 41 struct { 42 __le16 channels[2]; 43 s64 ts __aligned(8); 44 } scan; 45 }; 46 47 extern const struct dev_pm_ops hts221_pm_ops; 48 49 int hts221_probe(struct device *dev, int irq, const char *name, 50 struct regmap *regmap); 51 int hts221_set_enable(struct hts221_hw *hw, bool enable); 52 int hts221_allocate_buffers(struct iio_dev *iio_dev); 53 int hts221_allocate_trigger(struct iio_dev *iio_dev); 54 55 #endif /* HTS221_H */ 56