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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>
62 lines
1.4 KiB
C
62 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* ADXL372 3-Axis Digital Accelerometer I2C driver
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*
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* Copyright 2018 Analog Devices Inc.
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*/
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/regmap.h>
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#include "adxl372.h"
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static const struct regmap_config adxl372_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.readable_noinc_reg = adxl372_readable_noinc_reg,
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};
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static int adxl372_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 regmap *regmap;
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unsigned int regval;
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int ret;
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regmap = devm_regmap_init_i2c(client, &adxl372_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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ret = regmap_read(regmap, ADXL372_REVID, ®val);
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if (ret < 0)
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return ret;
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/* Starting with the 3rd revision an I2C chip bug was fixed */
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if (regval < 3)
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dev_warn(&client->dev,
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"I2C might not work properly with other devices on the bus");
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return adxl372_probe(&client->dev, regmap, client->irq, id->name);
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}
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static const struct i2c_device_id adxl372_i2c_id[] = {
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{ "adxl372", 0 },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, adxl372_i2c_id);
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static struct i2c_driver adxl372_i2c_driver = {
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.driver = {
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.name = "adxl372_i2c",
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},
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.probe = adxl372_i2c_probe,
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.id_table = adxl372_i2c_id,
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};
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module_i2c_driver(adxl372_i2c_driver);
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MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
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MODULE_DESCRIPTION("Analog Devices ADXL372 3-axis accelerometer I2C driver");
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MODULE_LICENSE("GPL");
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