a04d2f3989
Adds the chip select devicetree flags to the spi_cs_control instance. Signed-off-by: Jordan Yates <jordan.yates@data61.csiro.au>
130 lines
2.6 KiB
C
130 lines
2.6 KiB
C
/* ST Microelectronics LSM6DSO 6-axis IMU sensor driver
|
|
*
|
|
* Copyright (c) 2019 STMicroelectronics
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*
|
|
* Datasheet:
|
|
* https://www.st.com/resource/en/datasheet/lsm6dso.pdf
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT st_lsm6dso
|
|
|
|
#include <string.h>
|
|
#include "lsm6dso.h"
|
|
#include <logging/log.h>
|
|
|
|
#if DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
|
|
|
|
#define LSM6DSO_SPI_READ (1 << 7)
|
|
|
|
LOG_MODULE_DECLARE(LSM6DSO, CONFIG_SENSOR_LOG_LEVEL);
|
|
|
|
static int lsm6dso_spi_read(struct device *dev, uint8_t reg_addr,
|
|
uint8_t *value, uint8_t len)
|
|
{
|
|
struct lsm6dso_data *data = dev->driver_data;
|
|
const struct lsm6dso_config *cfg = dev->config_info;
|
|
const struct spi_config *spi_cfg = &cfg->spi_conf;
|
|
uint8_t buffer_tx[2] = { reg_addr | LSM6DSO_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(data->bus, spi_cfg, &tx, &rx)) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int lsm6dso_spi_write(struct device *dev, uint8_t reg_addr,
|
|
uint8_t *value, uint8_t len)
|
|
{
|
|
struct lsm6dso_data *data = dev->driver_data;
|
|
const struct lsm6dso_config *cfg = dev->config_info;
|
|
const struct spi_config *spi_cfg = &cfg->spi_conf;
|
|
uint8_t buffer_tx[1] = { reg_addr & ~LSM6DSO_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(data->bus, spi_cfg, &tx)) {
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int lsm6dso_spi_init(struct device *dev)
|
|
{
|
|
struct lsm6dso_data *data = dev->driver_data;
|
|
|
|
data->ctx_spi.read_reg = (stmdev_read_ptr) lsm6dso_spi_read,
|
|
data->ctx_spi.write_reg = (stmdev_write_ptr) lsm6dso_spi_write,
|
|
|
|
data->ctx = &data->ctx_spi;
|
|
data->ctx->handle = dev;
|
|
|
|
#if DT_INST_SPI_DEV_HAS_CS_GPIOS(0)
|
|
const struct lsm6dso_config *cfg = dev->config_info;
|
|
|
|
/* handle SPI CS thru GPIO if it is the case */
|
|
data->cs_ctrl.gpio_dev = device_get_binding(cfg->gpio_cs_port);
|
|
if (!data->cs_ctrl.gpio_dev) {
|
|
LOG_ERR("Unable to get GPIO SPI CS device");
|
|
return -ENODEV;
|
|
}
|
|
|
|
data->cs_ctrl.gpio_pin = cfg->cs_gpio;
|
|
data->cs_ctrl.gpio_dt_flags = cfg->cs_gpio_flags;
|
|
data->cs_ctrl.delay = 0;
|
|
|
|
LOG_DBG("SPI GPIO CS configured on %s:%u",
|
|
cfg->gpio_cs_port, cfg->cs_gpio);
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
#endif /* DT_ANY_INST_ON_BUS_STATUS_OKAY(spi) */
|