2 * STMicroelectronics hts221 sensor driver
4 * Copyright 2016 STMicroelectronics Inc.
6 * Lorenzo Bianconi <lorenzo.bianconi@st.com>
8 * Licensed under the GPL-2.
14 #define HTS221_DEV_NAME "hts221"
16 #include <linux/iio/iio.h>
18 #define HTS221_RX_MAX_LENGTH 8
19 #define HTS221_TX_MAX_LENGTH 8
21 #define HTS221_DATA_SIZE 2
23 struct hts221_transfer_buffer {
24 u8 rx_buf[HTS221_RX_MAX_LENGTH];
25 u8 tx_buf[HTS221_TX_MAX_LENGTH] ____cacheline_aligned;
28 struct hts221_transfer_function {
29 int (*read)(struct device *dev, u8 addr, int len, u8 *data);
30 int (*write)(struct device *dev, u8 addr, int len, u8 *data);
33 enum hts221_sensor_type {
39 struct hts221_sensor {
49 struct iio_trigger *trig;
52 struct hts221_sensor sensors[HTS221_SENSOR_MAX];
57 const struct hts221_transfer_function *tf;
58 struct hts221_transfer_buffer tb;
61 extern const struct dev_pm_ops hts221_pm_ops;
63 int hts221_write_with_mask(struct hts221_hw *hw, u8 addr, u8 mask, u8 val);
64 int hts221_probe(struct iio_dev *iio_dev);
65 int hts221_set_enable(struct hts221_hw *hw, bool enable);
66 int hts221_allocate_buffers(struct hts221_hw *hw);
67 int hts221_allocate_trigger(struct hts221_hw *hw);