drivers/iio/humidity/hts221.h

   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 #include <linux/regulator/consumer.h>
  17
  18 enum hts221_sensor_type {
  19         HTS221_SENSOR_H,
  20         HTS221_SENSOR_T,
  21         HTS221_SENSOR_MAX,
  22 };
  23
  24 struct hts221_sensor {
  25         u8 cur_avg_idx;
  26         int slope, b_gen;
  27 };
  28
  29 struct hts221_hw {
  30         const char *name;
  31         struct device *dev;
  32         struct regmap *regmap;
  33         struct regulator *vdd;
  34
  35         struct iio_trigger *trig;
  36         int irq;
  37
  38         struct hts221_sensor sensors[HTS221_SENSOR_MAX];
  39
  40         bool enabled;
  41         u8 odr;
  42         /* Ensure natural alignment of timestamp */
  43         struct {
  44                 __le16 channels[2];
  45                 s64 ts __aligned(8);
  46         } scan;
  47 };
  48
  49 extern const struct dev_pm_ops hts221_pm_ops;
  50
  51 int hts221_probe(struct device *dev, int irq, const char *name,
  52                  struct regmap *regmap);
  53 int hts221_set_enable(struct hts221_hw *hw, bool enable);
  54 int hts221_allocate_buffers(struct iio_dev *iio_dev);
  55 int hts221_allocate_trigger(struct iio_dev *iio_dev);
  56
  57 #endif /* HTS221_H */