105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/* adxl372_i2c.c - I2C routines for ADXL372 driver
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*/
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/*
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* Copyright (c) 2018 STMicroelectronics
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT adi_adxl372
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#include <string.h>
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#include <zephyr/logging/log.h>
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#include "adxl372.h"
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#if DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
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LOG_MODULE_DECLARE(ADXL372, CONFIG_SENSOR_LOG_LEVEL);
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static int adxl372_bus_access(const struct device *dev, uint8_t reg,
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void *data, size_t length)
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{
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const struct adxl372_dev_config *config = dev->config;
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if (reg & ADXL372_READ) {
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return i2c_burst_read_dt(&config->i2c,
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ADXL372_TO_I2C_REG(reg),
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(uint8_t *) data, length);
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} else {
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if (length != 1) {
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return -EINVAL;
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}
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return i2c_reg_write_byte_dt(&config->i2c,
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ADXL372_TO_I2C_REG(reg),
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*(uint8_t *)data);
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}
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}
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static int adxl372_i2c_reg_read(const struct device *dev, uint8_t reg_addr,
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uint8_t *reg_data)
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{
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return adxl372_bus_access(dev, ADXL372_REG_READ(reg_addr), reg_data, 1);
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}
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static int adxl372_i2c_reg_read_multiple(const struct device *dev,
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uint8_t reg_addr,
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uint8_t *reg_data,
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uint16_t count)
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{
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return adxl372_bus_access(dev, ADXL372_REG_READ(reg_addr),
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reg_data, count);
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}
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static int adxl372_i2c_reg_write(const struct device *dev,
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uint8_t reg_addr,
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uint8_t reg_data)
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{
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return adxl372_bus_access(dev, ADXL372_REG_WRITE(reg_addr),
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®_data, 1);
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}
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int adxl372_i2c_reg_write_mask(const struct device *dev,
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uint8_t reg_addr,
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uint32_t mask,
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uint8_t data)
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{
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int ret;
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uint8_t tmp;
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ret = adxl372_i2c_reg_read(dev, reg_addr, &tmp);
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if (ret) {
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return ret;
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}
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tmp &= ~mask;
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tmp |= data;
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return adxl372_i2c_reg_write(dev, reg_addr, tmp);
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}
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static const struct adxl372_transfer_function adxl372_i2c_transfer_fn = {
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.read_reg_multiple = adxl372_i2c_reg_read_multiple,
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.write_reg = adxl372_i2c_reg_write,
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.read_reg = adxl372_i2c_reg_read,
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.write_reg_mask = adxl372_i2c_reg_write_mask,
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};
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int adxl372_i2c_init(const struct device *dev)
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{
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struct adxl372_data *data = dev->data;
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const struct adxl372_dev_config *config = dev->config;
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data->hw_tf = &adxl372_i2c_transfer_fn;
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if (!device_is_ready(config->i2c.bus)) {
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return -ENODEV;
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}
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return 0;
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}
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#endif /* DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c) */
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