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iio: accel: adxl345: Add spi-3wire option

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Add a setup function implementation to the spi module to enable spi-3wire
when specified in the device-tree. If spi-3wire is not specified in the
device-tree, NULL is returned as bus pre-initialization. This behavior
is identical to the i2c initialization, hence the default initialization.

Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com>
Link: https://lore.kernel.org/r/20240401194906.56810-9-l.rubusch@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lothar Rubusch 2024-04-01 19:49:06 +00:00 committed by Jonathan Cameron
parent 34ca62caa0
commit 2f896dd97c
2 changed files with 10 additions and 1 deletions
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1
drivers/iio/accel/adxl345.h
View File

@ -31,6 +31,7 @@
#define ADXL345_DATA_FORMAT_RANGE GENMASK(1, 0) /* Set the g range */
#define ADXL345_DATA_FORMAT_JUSTIFY BIT(2) /* Left-justified (MSB) mode */
#define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */
#define ADXL345_DATA_FORMAT_SPI_3WIRE BIT(6) /* 3-wire SPI mode */
#define ADXL345_DATA_FORMAT_SELF_TEST BIT(7) /* Enable a self test */
#define ADXL345_DATA_FORMAT_2G 0

8
drivers/iio/accel/adxl345_spi.c
View File

@ -20,6 +20,11 @@ static const struct regmap_config adxl345_spi_regmap_config = {
.read_flag_mask = BIT(7) | BIT(6),
};
static int adxl345_spi_setup(struct device *dev, struct regmap *regmap)
{
return regmap_write(regmap, ADXL345_REG_DATA_FORMAT, ADXL345_DATA_FORMAT_SPI_3WIRE);
}
static int adxl345_spi_probe(struct spi_device *spi)
{
struct regmap *regmap;
@ -33,6 +38,9 @@ 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");
if (spi->mode & SPI_3WIRE)
return adxl345_core_probe(&spi->dev, regmap, adxl345_spi_setup);
else
return adxl345_core_probe(&spi->dev, regmap, NULL);
}