xref: /openbmc/linux/drivers/iio/humidity/hts221.h (revision 2c97f7b4)
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