diff options
Diffstat (limited to 'drivers/iio/humidity/hts221.h')
| -rw-r--r-- | drivers/iio/humidity/hts221.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/drivers/iio/humidity/hts221.h b/drivers/iio/humidity/hts221.h new file mode 100644 index 000000000..838c05056 --- /dev/null +++ b/drivers/iio/humidity/hts221.h @@ -0,0 +1,56 @@ +/* + * STMicroelectronics hts221 sensor driver + * + * Copyright 2016 STMicroelectronics Inc. + * + * Lorenzo Bianconi <lorenzo.bianconi@st.com> + * + * Licensed under the GPL-2. + */ + +#ifndef HTS221_H +#define HTS221_H + +#define HTS221_DEV_NAME "hts221" + +#include <linux/iio/iio.h> + +enum hts221_sensor_type { + HTS221_SENSOR_H, + HTS221_SENSOR_T, + HTS221_SENSOR_MAX, +}; + +struct hts221_sensor { + u8 cur_avg_idx; + int slope, b_gen; +}; + +struct hts221_hw { + const char *name; + struct device *dev; + struct regmap *regmap; + + struct iio_trigger *trig; + int irq; + + struct hts221_sensor sensors[HTS221_SENSOR_MAX]; + + bool enabled; + u8 odr; + /* Ensure natural alignment of timestamp */ + struct { + __le16 channels[2]; + s64 ts __aligned(8); + } scan; +}; + +extern const struct dev_pm_ops hts221_pm_ops; + +int hts221_probe(struct device *dev, int irq, const char *name, + struct regmap *regmap); +int hts221_set_enable(struct hts221_hw *hw, bool enable); +int hts221_allocate_buffers(struct hts221_hw *hw); +int hts221_allocate_trigger(struct hts221_hw *hw); + +#endif /* HTS221_H */ |