The adxl372 is designed to communicate in either SPI or I2C protocol. It autodetects the format being used, requiring no configuration control to select the format. Signed-off-by: Stefan Popa <stefan.popa@xxxxxxxxxx> --- MAINTAINERS | 1 + drivers/iio/accel/Kconfig | 11 ++++++++ drivers/iio/accel/Makefile | 1 + drivers/iio/accel/adxl372.c | 1 - drivers/iio/accel/adxl372.h | 2 ++ drivers/iio/accel/adxl372_i2c.c | 61 +++++++++++++++++++++++++++++++++++++++++ 6 files changed, 76 insertions(+), 1 deletion(-) create mode 100644 drivers/iio/accel/adxl372_i2c.c diff --git a/MAINTAINERS b/MAINTAINERS index 2938632..2b9a364 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -549,6 +549,7 @@ W: http://ez.analog.com/community/linux-device-drivers S: Supported F: drivers/iio/accel/adxl372.c F: drivers/iio/accel/adxl372_spi.c +F: drivers/iio/accel/adxl372_i2c.c F: Documentation/devicetree/bindings/iio/accel/adxl372.txt AF9013 MEDIA DRIVER diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index bed5da8..7993a67 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -76,6 +76,17 @@ config ADXL372_SPI To compile this driver as a module, choose M here: the module will be called adxl372_spi. +config ADXL372_I2C + tristate "Analog Devices ADXL372 3-Axis Accelerometer I2C Driver" + depends on I2C + select ADXL372 + select REGMAP_I2C + help + Say yes here to add support for the Analog Devices ADXL372 triaxial + acceleration sensor. + To compile this driver as a module, choose M here: the + module will be called adxl372_i2c. + 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 c9c5db9..56bd021 100644 --- a/drivers/iio/accel/Makefile +++ b/drivers/iio/accel/Makefile @@ -10,6 +10,7 @@ obj-$(CONFIG_ADXL345) += adxl345_core.o obj-$(CONFIG_ADXL345_I2C) += adxl345_i2c.o obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o obj-$(CONFIG_ADXL372) += adxl372.o +obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o obj-$(CONFIG_BMA180) += bma180.o obj-$(CONFIG_BMA220) += bma220_spi.o diff --git a/drivers/iio/accel/adxl372.c b/drivers/iio/accel/adxl372.c index f1df89d..3b84cb2 100644 --- a/drivers/iio/accel/adxl372.c +++ b/drivers/iio/accel/adxl372.c @@ -26,7 +26,6 @@ #define ADXL372_DEVID 0x00 #define ADXL372_DEVID_MST 0x01 #define ADXL372_PARTID 0x02 -#define ADXL372_REVID 0x03 #define ADXL372_STATUS_1 0x04 #define ADXL372_STATUS_2 0x05 #define ADXL372_FIFO_ENTRIES_2 0x06 diff --git a/drivers/iio/accel/adxl372.h b/drivers/iio/accel/adxl372.h index 5da89b1..80a0aa9 100644 --- a/drivers/iio/accel/adxl372.h +++ b/drivers/iio/accel/adxl372.h @@ -8,6 +8,8 @@ #ifndef _ADXL372_H_ #define _ADXL372_H_ +#define ADXL372_REVID 0x03 + int adxl372_probe(struct device *dev, struct regmap *regmap, int irq, const char *name); bool adxl372_readable_noinc_reg(struct device *dev, unsigned int reg); diff --git a/drivers/iio/accel/adxl372_i2c.c b/drivers/iio/accel/adxl372_i2c.c new file mode 100644 index 0000000..e1affe4 --- /dev/null +++ b/drivers/iio/accel/adxl372_i2c.c @@ -0,0 +1,61 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * ADXL372 3-Axis Digital Accelerometer I2C driver + * + * Copyright 2018 Analog Devices Inc. + */ + +#include <linux/i2c.h> +#include <linux/module.h> +#include <linux/regmap.h> + +#include "adxl372.h" + +static const struct regmap_config adxl372_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .readable_noinc_reg = adxl372_readable_noinc_reg, +}; + +static int adxl372_i2c_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct regmap *regmap; + unsigned int regval; + int ret; + + regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config); + if (IS_ERR(regmap)) + return PTR_ERR(regmap); + + ret = regmap_read(regmap, ADXL372_REVID, ®val); + if (ret < 0) + return ret; + + /* Starting with the 3rd revision an I2C chip bug was fixed */ + if (regval < 3) + dev_warn(&client->dev, + "I2C might not work properly with other devices on the bus"); + + return adxl372_probe(&client->dev, regmap, client->irq, id->name); +} + +static const struct i2c_device_id adxl372_i2c_id[] = { + { "adxl372", 0 }, + {} +}; +MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id); + +static struct i2c_driver adxl372_i2c_driver = { + .driver = { + .name = "adxl372_i2c", + }, + .probe = adxl372_i2c_probe, + .id_table = adxl372_i2c_id, +}; + +module_i2c_driver(adxl372_i2c_driver); + +MODULE_AUTHOR("Stefan Popa <stefan.popa@xxxxxxxxxx>"); +MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver"); +MODULE_LICENSE("GPL"); -- 2.7.4
