diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/accel/Kconfig | 14 | ||||
| -rw-r--r-- | drivers/iio/accel/Makefile | 1 | ||||
| -rw-r--r-- | drivers/iio/accel/adxl345_spi.c | 81 |
3 files changed, 96 insertions, 0 deletions
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index a725227aa7ca..15de262015df 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -22,6 +22,20 @@ config ADXL345_I2C will be called adxl345_i2c and you will also get adxl345_core for the core module. +config ADXL345_SPI + tristate "Analog Devices ADXL345 3-Axis Digital Accelerometer SPI Driver" + depends on INPUT_ADXL34X=n + depends on SPI + select ADXL345 + select REGMAP_SPI + help + Say Y here if you want to build support for the Analog Devices + ADXL345 3-axis digital accelerometer. + + To compile this driver as a module, choose M here: the module + will be called adxl345_spi and you will also get adxl345_core + for the core module. + config BMA180 tristate "Bosch BMA180/BMA250 3-Axis Accelerometer Driver" depends on I2C diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile index 3f4a6d62d84c..31fba1974e95 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -5,6 +5,7 @@ # When adding new entries keep the list in alphabetical order obj-$(CONFIG_ADXL345) += adxl345_core.o obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o +obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o obj-$(CONFIG_BMA180) += bma180.o obj-$(CONFIG_BMA220) += bma220_spi.o obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o diff --git a/drivers/iio/accel/adxl345_spi.c b/drivers/iio/accel/adxl345_spi.c new file mode 100644 index 000000000000..6d658196f81c --- /dev/null +++ b/drivers/iio/accel/adxl345_spi.c @@ -0,0 +1,81 @@ +/* + * ADXL345 3-Axis Digital Accelerometer SPI driver + * + * Copyright (c) 2017 Eva Rachel Retuya <eraretuya@gmail.com> + * + * This file is subject to the terms and conditions of version 2 of + * the GNU General Public License. See the file COPYING in the main + * directory of this archive for more details. + */ + +#include <linux/module.h> +#include <linux/regmap.h> +#include <linux/spi/spi.h> + +#include "adxl345.h" + +#define ADXL345_MAX_SPI_FREQ_HZ 5000000 + +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), +}; + +static int adxl345_spi_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct regmap *regmap; + + /* Bail out if max_speed_hz exceeds 5 MHz */ + if (spi->max_speed_hz > ADXL345_MAX_SPI_FREQ_HZ) { + dev_err(&spi->dev, "SPI CLK, %d Hz exceeds 5 MHz\n", + spi->max_speed_hz); + return -EINVAL; + } + + regmap = devm_regmap_init_spi(spi, &adxl345_spi_regmap_config); + if (IS_ERR(regmap)) { + dev_err(&spi->dev, "Error initializing spi regmap: %ld\n", + PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + + return adxl345_core_probe(&spi->dev, regmap, id->name); +} + +static int adxl345_spi_remove(struct spi_device *spi) +{ + return adxl345_core_remove(&spi->dev); +} + +static const struct spi_device_id adxl345_spi_id[] = { + { "adxl345", 0 }, + { } +}; + +MODULE_DEVICE_TABLE(spi, adxl345_spi_id); + +static const struct of_device_id adxl345_of_match[] = { + { .compatible = "adi,adxl345" }, + { }, +}; + +MODULE_DEVICE_TABLE(of, adxl345_of_match); + +static struct spi_driver adxl345_spi_driver = { + .driver = { + .name = "adxl345_spi", + .of_match_table = adxl345_of_match, + }, + .probe = adxl345_spi_probe, + .remove = adxl345_spi_remove, + .id_table = adxl345_spi_id, +}; + +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"); |