michaelh/zephyr
1
0
Fork 0
Code Releases Activity

drivers: sensor: bmi160: Add support for I2C

Browse source 
At present this driver only supports SPI. Add support for I2C as well,
following the model of BME280.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2020-10-08 12:57:11 -06:00 • committed by Carles Cufí
commit 0b1a7d109d
2 changed files with 56 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

53
drivers/sensor/bmi160/bmi160.c
View file

@ -11,6 +11,7 @@
#define DT_DRV_COMPAT bosch_bmi160
#include <init.h>
#include <drivers/i2c.h>
#include <drivers/sensor.h>
#include <sys/byteorder.h>
#include <kernel.h>
@ -81,6 +82,33 @@ static const struct bmi160_reg_io bmi160_reg_io_spi = {
};
#endif /* BMI160_BUS_SPI */
#if BMI160_BUS_I2C
int bmi160_read_i2c(const struct device *dev,
const struct bmi160_bus_cfg *bus_config, uint8_t reg_addr,
void *buf, uint8_t len)
{
struct bmi160_data *data = to_data(dev);
return i2c_burst_read(data->bus, bus_config->i2c_addr, reg_addr, buf,
len);
}
int bmi160_write_i2c(const struct device *dev,
const struct bmi160_bus_cfg *bus_config,
uint8_t reg_addr, void *buf, uint8_t len)
{
struct bmi160_data *data = to_data(dev);
return i2c_burst_write(data->bus, bus_config->i2c_addr, reg_addr, buf,
len);
}
static const struct bmi160_reg_io bmi160_reg_io_i2c = {
.read = bmi160_read_i2c,
.write = bmi160_write_i2c,
};
#endif
int bmi160_read(const struct device *dev, uint8_t reg_addr, void *buf,
uint8_t len)
{
@ -976,4 +1004,27 @@ int bmi160_init(const struct device *dev)
}; \
BMI160_DEVICE_INIT(inst)
DT_INST_FOREACH_STATUS_OKAY(BMI160_DEFINE_SPI)
/* Instantiation macros used when a device is on an I2C bus */
#define BMI160_CONFIG_I2C(inst) \
{ \
.bus_label = DT_INST_BUS_LABEL(inst), \
.reg_io = &bmi160_reg_io_i2c, \
.bus_cfg = { .i2c_addr = DT_INST_REG_ADDR(inst), } \
}
#define BMI160_DEFINE_I2C(inst) \
static struct bmi160_data bmi160_data_##inst; \
static const struct bmi160_cfg bmi160_cfg_##inst = \
BMI160_CONFIG_I2C(inst); \
BMI160_DEVICE_INIT(inst)
/*
* Main instantiation macro. Use of COND_CODE_1() selects the right
* bus-specific macro at preprocessor time.
*/
#define BMI160_DEFINE(inst) \
COND_CODE_1(DT_INST_ON_BUS(inst, spi), \
(BMI160_DEFINE_SPI(inst)), \
(BMI160_DEFINE_I2C(inst)))
DT_INST_FOREACH_STATUS_OKAY(BMI160_DEFINE)

4
drivers/sensor/bmi160/bmi160.h
View file

@ -399,11 +399,15 @@ struct bmi160_range {
};
#define BMI160_BUS_SPI DT_ANY_INST_ON_BUS_STATUS_OKAY(spi)
#define BMI160_BUS_I2C DT_ANY_INST_ON_BUS_STATUS_OKAY(i2c)
struct bmi160_bus_cfg {
union {
#if BMI160_BUS_SPI
const struct spi_config *spi_cfg;
#endif
#if BMI160_BUS_I2C
uint16_t i2c_addr;
#endif
};
};