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author | Stefan Popa <stefan.popa@analog.com> | 2018-09-04 17:12:32 +0300 |
---|---|---|
committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-09-08 15:54:38 +0100 |
commit | 94dbb46c7a8f0ee27394bc81f34b666dc4a14b71 (patch) | |
tree | 627eb6a74b0f0e026e1b2639d3900256ebb5f603 | |
parent | d9e8fd0421c2047ac233141612a433490963d211 (diff) | |
download | linux-94dbb46c7a8f0ee27394bc81f34b666dc4a14b71.tar.gz linux-94dbb46c7a8f0ee27394bc81f34b666dc4a14b71.tar.bz2 linux-94dbb46c7a8f0ee27394bc81f34b666dc4a14b71.zip |
iio: adxl372: Add support for I2C communication
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@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
-rw-r--r-- | MAINTAINERS | 1 | ||||
-rw-r--r-- | drivers/iio/accel/Kconfig | 11 | ||||
-rw-r--r-- | drivers/iio/accel/Makefile | 1 | ||||
-rw-r--r-- | drivers/iio/accel/adxl372.c | 1 | ||||
-rw-r--r-- | drivers/iio/accel/adxl372.h | 2 | ||||
-rw-r--r-- | drivers/iio/accel/adxl372_i2c.c | 61 |
6 files changed, 76 insertions, 1 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 293863299b50..2b9a364b043d 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 bed5da875eac..7993a67bd351 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 c9c5db9764bd..56bd0215e0d4 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 f1df89d8c6fa..3b84cb243a87 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 5da89b19c17e..80a0aa9714fc 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 000000000000..e1affe480c77 --- /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@analog.com>"); +MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver"); +MODULE_LICENSE("GPL"); |