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iio: accel: adxl345: Pass function pointer to core

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Provide a way for bus specific pre-configuration by adding a function
pointer argument to the driver core's probe() function, and keep
the driver core implementation bus independent.

In case NULL was passed, a regmap_write() shall initialize all bits of
the data_format register, else regmap_update() is used. In this way
spi and i2c are covered.

Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-6-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lothar Rubusch 2024-04-01 19:49:03 +00:00 committed by Jonathan Cameron
parent 59307e8f74
commit 41561abc41
4 changed files with 29 additions and 10 deletions
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3
drivers/iio/accel/adxl345.h
View file

@ -60,6 +60,7 @@ struct adxl345_chip_info {
int uscale;
};
int adxl345_core_probe(struct device *dev, struct regmap *regmap);
int adxl345_core_probe(struct device *dev, struct regmap *regmap,
int (*setup)(struct device*, struct regmap*));
#endif /* _ADXL345_H_ */

32
drivers/iio/accel/adxl345_core.c
View file

@ -168,7 +168,8 @@ static void adxl345_powerdown(void *regmap)
regmap_write(regmap, ADXL345_REG_POWER_CTL, ADXL345_POWER_CTL_STANDBY);
}
int adxl345_core_probe(struct device *dev, struct regmap *regmap)
int adxl345_core_probe(struct device *dev, struct regmap *regmap,
int (*setup)(struct device*, struct regmap*))
{
struct adxl345_data *data;
struct iio_dev *indio_dev;
@ -179,6 +180,29 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap)
ADXL345_DATA_FORMAT_SELF_TEST);
int ret;
if (setup) {
/* Perform optional initial bus specific configuration */
ret = setup(dev, regmap);
if (ret)
return ret;
/* Enable full-resolution mode */
ret = regmap_update_bits(regmap, ADXL345_REG_DATA_FORMAT,
data_format_mask,
ADXL345_DATA_FORMAT_FULL_RES);
if (ret)
return dev_err_probe(dev, ret,
"Failed to set data range\n");
} else {
/* Enable full-resolution mode (init all data_format bits) */
ret = regmap_write(regmap, ADXL345_REG_DATA_FORMAT,
ADXL345_DATA_FORMAT_FULL_RES);
if (ret)
return dev_err_probe(dev, ret,
"Failed to set data range\n");
}
ret = regmap_read(regmap, ADXL345_REG_DEVID, &regval);
if (ret < 0)
return dev_err_probe(dev, ret, "Error reading device ID\n");
@ -203,12 +227,6 @@ int adxl345_core_probe(struct device *dev, struct regmap *regmap)
indio_dev->channels = adxl345_channels;
indio_dev->num_channels = ARRAY_SIZE(adxl345_channels);
/* Enable full-resolution mode */
ret = regmap_update_bits(regmap, ADXL345_REG_DATA_FORMAT,
data_format_mask, ADXL345_DATA_FORMAT_FULL_RES);
if (ret)
return dev_err_probe(dev, ret, "Failed to set data range\n");
/* Enable measurement mode */
ret = adxl345_powerup(data->regmap);
if (ret < 0)

2
drivers/iio/accel/adxl345_i2c.c
View file

@ -27,7 +27,7 @@ static int adxl345_i2c_probe(struct i2c_client *client)
if (IS_ERR(regmap))
return dev_err_probe(&client->dev, PTR_ERR(regmap), "Error initializing regmap\n");
return adxl345_core_probe(&client->dev, regmap);
return adxl345_core_probe(&client->dev, regmap, NULL);
}
static const struct adxl345_chip_info adxl345_i2c_info = {

2
drivers/iio/accel/adxl345_spi.c
View file

@ -33,7 +33,7 @@ static int adxl345_spi_probe(struct spi_device *spi)
if (IS_ERR(regmap))
return dev_err_probe(&spi->dev, PTR_ERR(regmap), "Error initializing regmap\n");
return adxl345_core_probe(&spi->dev, regmap);
return adxl345_core_probe(&spi->dev, regmap, NULL);
}
static const struct adxl345_chip_info adxl345_spi_info = {