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https://github.com/zephyrproject-rtos/zephyr
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1ebb708910
Add I2C and SPI bus communication routines in separate files, and register one or the other as read/write callbacks based on bus selection in DTS. This commit is fixing issue #22348 as well, as the SPI part is handling in the proper way the CS GPIO part. Signed-off-by: Armando Visconti <armando.visconti@st.com>
93 lines
2.3 KiB
C
93 lines
2.3 KiB
C
/* ST Microelectronics LIS2DH 3-axis accelerometer driver
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*
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* Copyright (c) 2020 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Datasheet:
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* https://www.st.com/resource/en/datasheet/lis2dh.pdf
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*/
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#include <string.h>
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#include <drivers/i2c.h>
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#include <logging/log.h>
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#include "lis2dh.h"
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#ifdef DT_ST_LIS2DH_BUS_I2C
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LOG_MODULE_DECLARE(lis2dh, CONFIG_SENSOR_LOG_LEVEL);
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static int lis2dh_i2c_read_data(struct device *dev, u8_t reg_addr,
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u8_t *value, u8_t len)
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{
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struct lis2dh_data *data = dev->driver_data;
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const struct lis2dh_config *cfg = dev->config->config_info;
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return i2c_burst_read(data->bus, cfg->i2c_slv_addr,
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reg_addr | LIS2DH_AUTOINCREMENT_ADDR,
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value, len);
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}
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static int lis2dh_i2c_write_data(struct device *dev, u8_t reg_addr,
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u8_t *value, u8_t len)
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{
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struct lis2dh_data *data = dev->driver_data;
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const struct lis2dh_config *cfg = dev->config->config_info;
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return i2c_burst_write(data->bus, cfg->i2c_slv_addr,
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reg_addr | LIS2DH_AUTOINCREMENT_ADDR,
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value, len);
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}
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static int lis2dh_i2c_read_reg(struct device *dev, u8_t reg_addr,
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u8_t *value)
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{
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struct lis2dh_data *data = dev->driver_data;
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const struct lis2dh_config *cfg = dev->config->config_info;
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return i2c_reg_read_byte(data->bus,
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cfg->i2c_slv_addr,
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reg_addr, value);
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}
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static int lis2dh_i2c_write_reg(struct device *dev, u8_t reg_addr,
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u8_t value)
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{
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struct lis2dh_data *data = dev->driver_data;
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const struct lis2dh_config *cfg = dev->config->config_info;
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return i2c_reg_write_byte(data->bus,
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cfg->i2c_slv_addr,
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reg_addr, value);
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}
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static int lis2dh_i2c_update_reg(struct device *dev, u8_t reg_addr,
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u8_t mask, u8_t value)
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{
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struct lis2dh_data *data = dev->driver_data;
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const struct lis2dh_config *cfg = dev->config->config_info;
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return i2c_reg_update_byte(data->bus,
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cfg->i2c_slv_addr,
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reg_addr, mask, value);
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}
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static const struct lis2dh_transfer_function lis2dh_i2c_transfer_fn = {
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.read_data = lis2dh_i2c_read_data,
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.write_data = lis2dh_i2c_write_data,
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.read_reg = lis2dh_i2c_read_reg,
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.write_reg = lis2dh_i2c_write_reg,
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.update_reg = lis2dh_i2c_update_reg,
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};
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int lis2dh_i2c_init(struct device *dev)
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{
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struct lis2dh_data *data = dev->driver_data;
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data->hw_tf = &lis2dh_i2c_transfer_fn;
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return 0;
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}
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#endif /* DT_ST_LIS2DH_BUS_I2C */
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