blob: b04a6cf59d550d610cbb9b1152e233107343dd1f [file] [log] [blame]
/* lsm6dsl_spi.c - SPI routines for LSM6DSL driver
*/
/*
* Copyright (c) 2018 STMicroelectronics
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT st_lsm6dsl
#include <string.h>
#include <zephyr/logging/log.h>
#include "lsm6dsl.h"
#if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
#define LSM6DSL_SPI_READ (1 << 7)
LOG_MODULE_DECLARE(LSM6DSL, CONFIG_SENSOR_LOG_LEVEL);
static int lsm6dsl_raw_read(const struct device *dev, uint8_t reg_addr,
uint8_t *value, uint8_t len)
{
const struct lsm6dsl_config *cfg = dev->config;
uint8_t buffer_tx[2] = { reg_addr | LSM6DSL_SPI_READ, 0 };
const struct spi_buf tx_buf = {
.buf = buffer_tx,
.len = 2,
};
const struct spi_buf_set tx = {
.buffers = &tx_buf,
.count = 1
};
const struct spi_buf rx_buf[2] = {
{
.buf = NULL,
.len = 1,
},
{
.buf = value,
.len = len,
}
};
const struct spi_buf_set rx = {
.buffers = rx_buf,
.count = 2
};
if (len > 64) {
return -EIO;
}
if (spi_transceive_dt(&cfg->bus_cfg.spi, &tx, &rx)) {
return -EIO;
}
return 0;
}
static int lsm6dsl_raw_write(const struct device *dev, uint8_t reg_addr,
uint8_t *value, uint8_t len)
{
const struct lsm6dsl_config *cfg = dev->config;
uint8_t buffer_tx[1] = { reg_addr & ~LSM6DSL_SPI_READ };
const struct spi_buf tx_buf[2] = {
{
.buf = buffer_tx,
.len = 1,
},
{
.buf = value,
.len = len,
}
};
const struct spi_buf_set tx = {
.buffers = tx_buf,
.count = 2
};
if (len > 64) {
return -EIO;
}
if (spi_write_dt(&cfg->bus_cfg.spi, &tx)) {
return -EIO;
}
return 0;
}
static int lsm6dsl_spi_read_data(const struct device *dev, uint8_t reg_addr,
uint8_t *value, uint8_t len)
{
return lsm6dsl_raw_read(dev, reg_addr, value, len);
}
static int lsm6dsl_spi_write_data(const struct device *dev, uint8_t reg_addr,
uint8_t *value, uint8_t len)
{
return lsm6dsl_raw_write(dev, reg_addr, value, len);
}
static int lsm6dsl_spi_read_reg(const struct device *dev, uint8_t reg_addr,
uint8_t *value)
{
return lsm6dsl_raw_read(dev, reg_addr, value, 1);
}
static int lsm6dsl_spi_update_reg(const struct device *dev, uint8_t reg_addr,
uint8_t mask, uint8_t value)
{
uint8_t tmp_val;
lsm6dsl_raw_read(dev, reg_addr, &tmp_val, 1);
tmp_val = (tmp_val & ~mask) | (value & mask);
return lsm6dsl_raw_write(dev, reg_addr, &tmp_val, 1);
}
static const struct lsm6dsl_transfer_function lsm6dsl_spi_transfer_fn = {
.read_data = lsm6dsl_spi_read_data,
.write_data = lsm6dsl_spi_write_data,
.read_reg = lsm6dsl_spi_read_reg,
.update_reg = lsm6dsl_spi_update_reg,
};
int lsm6dsl_spi_init(const struct device *dev)
{
struct lsm6dsl_data *data = dev->data;
const struct lsm6dsl_config *cfg = dev->config;
data->hw_tf = &lsm6dsl_spi_transfer_fn;
if (!spi_is_ready_dt(&cfg->bus_cfg.spi)) {
return -ENODEV;
}
return 0;
}
#endif /* DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) */