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
  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 */