diff options
Diffstat (limited to 'drivers/iio/accel/adxl345_spi.c')
| -rw-r--r-- | drivers/iio/accel/adxl345_spi.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/iio/accel/adxl345_spi.c b/drivers/iio/accel/adxl345_spi.c index 93ca349f1780..0315f4bfd69a 100644 --- a/drivers/iio/accel/adxl345_spi.c +++ b/drivers/iio/accel/adxl345_spi.c @@ -12,17 +12,26 @@ #include "adxl345.h" #define ADXL345_MAX_SPI_FREQ_HZ 5000000 +#define ADXL345_MAX_FREQ_NO_FIFO_DELAY 1500000 static const struct regmap_config adxl345_spi_regmap_config = { .reg_bits = 8, .val_bits = 8, /* Setting bits 7 and 6 enables multiple-byte read */ .read_flag_mask = BIT(7) | BIT(6), + .volatile_reg = adxl345_is_volatile_reg, + .cache_type = REGCACHE_MAPLE, }; +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; + bool needs_delay; /* Bail out if max_speed_hz exceeds 5 MHz */ if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ) @@ -33,7 +42,11 @@ 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); + needs_delay = spi->max_speed_hz > ADXL345_MAX_FREQ_NO_FIFO_DELAY; + if (spi->mode & SPI_3WIRE) + return adxl345_core_probe(&spi->dev, regmap, needs_delay, adxl345_spi_setup); + else + return adxl345_core_probe(&spi->dev, regmap, needs_delay, NULL); } static const struct adxl345_chip_info adxl345_spi_info = { @@ -80,4 +93,4 @@ module_spi_driver(adxl345_spi_driver); MODULE_AUTHOR("Eva Rachel Retuya <eraretuya@gmail.com>"); MODULE_DESCRIPTION("ADXL345 3-Axis Digital Accelerometer SPI driver"); MODULE_LICENSE("GPL v2"); -MODULE_IMPORT_NS(IIO_ADXL345); +MODULE_IMPORT_NS("IIO_ADXL345"); |