1 /* ST Microelectronics IIS2DH 3-axis accelerometer driver
2 *
3 * Copyright (c) 2020 STMicroelectronics
4 *
5 * SPDX-License-Identifier: Apache-2.0
6 *
7 * Datasheet:
8 * https://www.st.com/resource/en/datasheet/iis2dh.pdf
9 */
10
11 #define DT_DRV_COMPAT st_iis2dh
12
13 #include <string.h>
14 #include <zephyr/drivers/i2c.h>
15 #include <zephyr/logging/log.h>
16
17 #include "iis2dh.h"
18
19 #if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
20
21 LOG_MODULE_DECLARE(IIS2DH, CONFIG_SENSOR_LOG_LEVEL);
22
iis2dh_i2c_read(const struct device * dev,uint8_t reg_addr,uint8_t * value,uint16_t len)23 static int iis2dh_i2c_read(const struct device *dev, uint8_t reg_addr, uint8_t *value, uint16_t len)
24 {
25 const struct iis2dh_device_config *config = dev->config;
26
27 return i2c_burst_read_dt(&config->i2c, reg_addr | 0x80, value, len);
28 }
29
iis2dh_i2c_write(const struct device * dev,uint8_t reg_addr,uint8_t * value,uint16_t len)30 static int iis2dh_i2c_write(const struct device *dev, uint8_t reg_addr, uint8_t *value,
31 uint16_t len)
32 {
33 const struct iis2dh_device_config *config = dev->config;
34
35 return i2c_burst_write_dt(&config->i2c, reg_addr | 0x80, value, len);
36 }
37
38 stmdev_ctx_t iis2dh_i2c_ctx = {
39 .read_reg = (stmdev_read_ptr) iis2dh_i2c_read,
40 .write_reg = (stmdev_write_ptr) iis2dh_i2c_write,
41 .mdelay = (stmdev_mdelay_ptr) stmemsc_mdelay,
42 };
43
iis2dh_i2c_init(const struct device * dev)44 int iis2dh_i2c_init(const struct device *dev)
45 {
46 struct iis2dh_data *data = dev->data;
47 const struct iis2dh_device_config *config = dev->config;
48
49 if (!device_is_ready(config->i2c.bus)) {
50 LOG_ERR("Bus device is not ready");
51 return -ENODEV;
52 }
53
54 data->ctx = &iis2dh_i2c_ctx;
55 data->ctx->handle = (void *)dev;
56
57 return 0;
58 }
59 #endif /* DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c) */
60
