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iio: accel: add ADXL367 driver
The ADXL367 is an ultralow power, 3-axis MEMS accelerometer. The ADXL367 does not alias input signals to achieve ultralow power consumption, it samples the full bandwidth of the sensor at all data rates. Measurement ranges of +-2g, +-4g, and +-8g are available, with a resolution of 0.25mg/LSB on the +-2 g range. In addition to its ultralow power consumption, the ADXL367 has many features to enable true system level power reduction. It includes a deep multimode output FIFO, a built-in micropower temperature sensor, and an internal ADC for synchronous conversion of an additional analog input. Signed-off-by: Cosmin Tanislav <cosmin.tanislav@analog.com> Link: https://lore.kernel.org/r/20220214073810.781016-6-cosmin.tanislav@analog.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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@ -606,6 +606,14 @@ F: drivers/iio/accel/adxl355_core.c
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F: drivers/iio/accel/adxl355_i2c.c
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F: drivers/iio/accel/adxl355_spi.c
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ADXL367 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
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M: Cosmin Tanislav <cosmin.tanislav@analog.com>
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L: linux-iio@vger.kernel.org
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S: Supported
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W: http://ez.analog.com/community/linux-device-drivers
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F: Documentation/devicetree/bindings/iio/accel/adi,adxl367.yaml
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F: drivers/iio/accel/adxl367*
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ADXL372 THREE-AXIS DIGITAL ACCELEROMETER DRIVER
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M: Michael Hennerich <michael.hennerich@analog.com>
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S: Supported
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@ -123,6 +123,33 @@ config ADXL355_SPI
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will be called adxl355_spi and you will also get adxl355_core
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for the core module.
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config ADXL367
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tristate
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select IIO_BUFFER
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select IIO_TRIGGERED_BUFFER
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config ADXL367_SPI
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tristate "Analog Devices ADXL367 3-Axis Accelerometer SPI Driver"
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depends on SPI
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select ADXL367
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select REGMAP_SPI
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help
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Say yes here to add support for the Analog Devices ADXL367 triaxial
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acceleration sensor.
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To compile this driver as a module, choose M here: the
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module will be called adxl367_spi.
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config ADXL367_I2C
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tristate "Analog Devices ADXL367 3-Axis Accelerometer I2C Driver"
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depends on I2C
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select ADXL367
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select REGMAP_I2C
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help
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Say yes here to add support for the Analog Devices ADXL367 triaxial
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acceleration sensor.
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To compile this driver as a module, choose M here: the
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module will be called adxl367_i2c.
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config ADXL372
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tristate
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select IIO_BUFFER
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@ -15,6 +15,9 @@ obj-$(CONFIG_ADXL345_SPI) += adxl345_spi.o
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obj-$(CONFIG_ADXL355) += adxl355_core.o
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obj-$(CONFIG_ADXL355_I2C) += adxl355_i2c.o
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obj-$(CONFIG_ADXL355_SPI) += adxl355_spi.o
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obj-$(CONFIG_ADXL367) += adxl367.o
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obj-$(CONFIG_ADXL367_I2C) += adxl367_i2c.o
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obj-$(CONFIG_ADXL367_SPI) += adxl367_spi.o
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obj-$(CONFIG_ADXL372) += adxl372.o
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obj-$(CONFIG_ADXL372_I2C) += adxl372_i2c.o
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obj-$(CONFIG_ADXL372_SPI) += adxl372_spi.o
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1588
drivers/iio/accel/adxl367.c
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1588
drivers/iio/accel/adxl367.c
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File diff suppressed because it is too large
Load diff
23
drivers/iio/accel/adxl367.h
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23
drivers/iio/accel/adxl367.h
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@ -0,0 +1,23 @@
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/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* Copyright (C) 2021 Analog Devices, Inc.
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* Author: Cosmin Tanislav <cosmin.tanislav@analog.com>
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*/
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#ifndef _ADXL367_H_
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#define _ADXL367_H_
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#include <linux/types.h>
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struct device;
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struct regmap;
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struct adxl367_ops {
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int (*read_fifo)(void *context, __be16 *fifo_buf,
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unsigned int fifo_entries);
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};
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int adxl367_probe(struct device *dev, const struct adxl367_ops *ops,
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void *context, struct regmap *regmap, int irq);
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#endif /* _ADXL367_H_ */
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90
drivers/iio/accel/adxl367_i2c.c
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90
drivers/iio/accel/adxl367_i2c.c
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@ -0,0 +1,90 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2021 Analog Devices, Inc.
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* Author: Cosmin Tanislav <cosmin.tanislav@analog.com>
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*/
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#include <linux/i2c.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "adxl367.h"
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#define ADXL367_I2C_FIFO_DATA 0x42
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struct adxl367_i2c_state {
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struct regmap *regmap;
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};
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static bool adxl367_readable_noinc_reg(struct device *dev, unsigned int reg)
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{
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return reg == ADXL367_I2C_FIFO_DATA;
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}
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static int adxl367_i2c_read_fifo(void *context, __be16 *fifo_buf,
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unsigned int fifo_entries)
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{
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struct adxl367_i2c_state *st = context;
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return regmap_noinc_read(st->regmap, ADXL367_I2C_FIFO_DATA, fifo_buf,
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fifo_entries * sizeof(*fifo_buf));
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}
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static const struct regmap_config adxl367_i2c_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.readable_noinc_reg = adxl367_readable_noinc_reg,
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};
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static const struct adxl367_ops adxl367_i2c_ops = {
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.read_fifo = adxl367_i2c_read_fifo,
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};
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static int adxl367_i2c_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct adxl367_i2c_state *st;
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struct regmap *regmap;
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st = devm_kzalloc(&client->dev, sizeof(*st), GFP_KERNEL);
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if (!st)
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return -ENOMEM;
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regmap = devm_regmap_init_i2c(client, &adxl367_i2c_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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st->regmap = regmap;
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return adxl367_probe(&client->dev, &adxl367_i2c_ops, st, regmap,
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client->irq);
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}
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static const struct i2c_device_id adxl367_i2c_id[] = {
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{ "adxl367", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(i2c, adxl367_i2c_id);
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static const struct of_device_id adxl367_of_match[] = {
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{ .compatible = "adi,adxl367" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, adxl367_of_match);
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static struct i2c_driver adxl367_i2c_driver = {
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.driver = {
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.name = "adxl367_i2c",
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.of_match_table = adxl367_of_match,
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},
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.probe = adxl367_i2c_probe,
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.id_table = adxl367_i2c_id,
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};
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module_i2c_driver(adxl367_i2c_driver);
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MODULE_IMPORT_NS(IIO_ADXL367);
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MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>");
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MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer I2C driver");
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MODULE_LICENSE("GPL");
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164
drivers/iio/accel/adxl367_spi.c
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164
drivers/iio/accel/adxl367_spi.c
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@ -0,0 +1,164 @@
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2021 Analog Devices, Inc.
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* Author: Cosmin Tanislav <cosmin.tanislav@analog.com>
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*/
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include <linux/spi/spi.h>
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#include "adxl367.h"
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#define ADXL367_SPI_WRITE_COMMAND 0x0A
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#define ADXL367_SPI_READ_COMMAND 0x0B
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#define ADXL367_SPI_FIFO_COMMAND 0x0D
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struct adxl367_spi_state {
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struct spi_device *spi;
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struct spi_message reg_write_msg;
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struct spi_transfer reg_write_xfer[2];
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struct spi_message reg_read_msg;
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struct spi_transfer reg_read_xfer[2];
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struct spi_message fifo_msg;
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struct spi_transfer fifo_xfer[2];
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/*
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* DMA (thus cache coherency maintenance) requires the
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* transfer buffers to live in their own cache lines.
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*/
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u8 reg_write_tx_buf[1] ____cacheline_aligned;
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u8 reg_read_tx_buf[2];
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u8 fifo_tx_buf[1];
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};
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static int adxl367_read_fifo(void *context, __be16 *fifo_buf,
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unsigned int fifo_entries)
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{
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struct adxl367_spi_state *st = context;
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st->fifo_xfer[1].rx_buf = fifo_buf;
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st->fifo_xfer[1].len = fifo_entries * sizeof(*fifo_buf);
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return spi_sync(st->spi, &st->fifo_msg);
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}
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static int adxl367_read(void *context, const void *reg_buf, size_t reg_size,
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void *val_buf, size_t val_size)
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{
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struct adxl367_spi_state *st = context;
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u8 reg = ((const u8 *)reg_buf)[0];
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st->reg_read_tx_buf[1] = reg;
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st->reg_read_xfer[1].rx_buf = val_buf;
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st->reg_read_xfer[1].len = val_size;
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return spi_sync(st->spi, &st->reg_read_msg);
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}
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static int adxl367_write(void *context, const void *val_buf, size_t val_size)
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{
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struct adxl367_spi_state *st = context;
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st->reg_write_xfer[1].tx_buf = val_buf;
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st->reg_write_xfer[1].len = val_size;
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return spi_sync(st->spi, &st->reg_write_msg);
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}
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static struct regmap_bus adxl367_spi_regmap_bus = {
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.read = adxl367_read,
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.write = adxl367_write,
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};
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static const struct regmap_config adxl367_spi_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static const struct adxl367_ops adxl367_spi_ops = {
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.read_fifo = adxl367_read_fifo,
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};
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static int adxl367_spi_probe(struct spi_device *spi)
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{
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struct adxl367_spi_state *st;
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struct regmap *regmap;
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st = devm_kzalloc(&spi->dev, sizeof(*st), GFP_KERNEL);
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if (!st)
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return -ENOMEM;
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st->spi = spi;
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/*
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* Xfer: [XFR1] [ XFR2 ]
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* Master: 0x0A ADDR DATA0 DATA1 ... DATAN
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* Slave: .... ..........................
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*/
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st->reg_write_tx_buf[0] = ADXL367_SPI_WRITE_COMMAND;
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st->reg_write_xfer[0].tx_buf = st->reg_write_tx_buf;
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st->reg_write_xfer[0].len = sizeof(st->reg_write_tx_buf);
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spi_message_init_with_transfers(&st->reg_write_msg,
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st->reg_write_xfer, 2);
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/*
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* Xfer: [ XFR1 ] [ XFR2 ]
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* Master: 0x0B ADDR .....................
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* Slave: ......... DATA0 DATA1 ... DATAN
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*/
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st->reg_read_tx_buf[0] = ADXL367_SPI_READ_COMMAND;
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st->reg_read_xfer[0].tx_buf = st->reg_read_tx_buf;
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st->reg_read_xfer[0].len = sizeof(st->reg_read_tx_buf);
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spi_message_init_with_transfers(&st->reg_read_msg,
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st->reg_read_xfer, 2);
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/*
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* Xfer: [XFR1] [ XFR2 ]
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* Master: 0x0D .....................
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* Slave: .... DATA0 DATA1 ... DATAN
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*/
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st->fifo_tx_buf[0] = ADXL367_SPI_FIFO_COMMAND;
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st->fifo_xfer[0].tx_buf = st->fifo_tx_buf;
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st->fifo_xfer[0].len = sizeof(st->fifo_tx_buf);
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spi_message_init_with_transfers(&st->fifo_msg, st->fifo_xfer, 2);
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regmap = devm_regmap_init(&spi->dev, &adxl367_spi_regmap_bus, st,
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&adxl367_spi_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return adxl367_probe(&spi->dev, &adxl367_spi_ops, st, regmap, spi->irq);
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}
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static const struct spi_device_id adxl367_spi_id[] = {
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{ "adxl367", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(spi, adxl367_spi_id);
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static const struct of_device_id adxl367_of_match[] = {
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{ .compatible = "adi,adxl367" },
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{ },
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};
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MODULE_DEVICE_TABLE(of, adxl367_of_match);
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static struct spi_driver adxl367_spi_driver = {
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.driver = {
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.name = "adxl367_spi",
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.of_match_table = adxl367_of_match,
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},
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.probe = adxl367_spi_probe,
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.id_table = adxl367_spi_id,
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};
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module_spi_driver(adxl367_spi_driver);
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MODULE_IMPORT_NS(IIO_ADXL367);
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MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>");
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MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer SPI driver");
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MODULE_LICENSE("GPL");
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