6731ca3999
We can utilize separate drivers for accelerometer and magnetometer, so here is the glue driver to enable LSM9DS0 IMU support. The idea was suggested by Crestez Dan Leonard in [1]. The proposed change was sent as RFC due to race condition concerns, which are indeed possible. In order to amend the initial change, I went further by providing a specific multi-instantiate probe driver that reuses existing accelerometer and magnetometer. [1]: https://lore.kernel.org/patchwork/patch/670353/ Suggested-by: Crestez Dan Leonard <leonard.crestez@intel.com> Cc: mr.lahorde@laposte.net Cc: Matija Podravec <matija_podravec@fastmail.fm> Cc: Sergey Borishchenko <borischenko.sergey@gmail.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://lore.kernel.org/r/20210414195454.84183-6-andriy.shevchenko@linux.intel.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* STMicroelectronics LSM9DS0 IMU driver
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*
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* Copyright (C) 2021, Intel Corporation
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*
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* Author: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
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*/
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#include <linux/i2c.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/iio/common/st_sensors_i2c.h>
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#include "st_lsm9ds0.h"
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static const struct of_device_id st_lsm9ds0_of_match[] = {
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{
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.compatible = "st,lsm9ds0-imu",
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.data = LSM9DS0_IMU_DEV_NAME,
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},
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{}
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};
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MODULE_DEVICE_TABLE(of, st_lsm9ds0_of_match);
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static const struct i2c_device_id st_lsm9ds0_id_table[] = {
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{ LSM9DS0_IMU_DEV_NAME },
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{}
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};
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MODULE_DEVICE_TABLE(i2c, st_lsm9ds0_id_table);
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static const struct regmap_config st_lsm9ds0_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.read_flag_mask = 0x80,
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};
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static int st_lsm9ds0_i2c_probe(struct i2c_client *client)
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{
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const struct regmap_config *config = &st_lsm9ds0_regmap_config;
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struct device *dev = &client->dev;
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struct st_lsm9ds0 *lsm9ds0;
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struct regmap *regmap;
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st_sensors_dev_name_probe(dev, client->name, sizeof(client->name));
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lsm9ds0 = devm_kzalloc(dev, sizeof(*lsm9ds0), GFP_KERNEL);
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if (!lsm9ds0)
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return -ENOMEM;
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lsm9ds0->dev = dev;
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lsm9ds0->name = client->name;
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lsm9ds0->irq = client->irq;
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regmap = devm_regmap_init_i2c(client, config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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i2c_set_clientdata(client, lsm9ds0);
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return st_lsm9ds0_probe(lsm9ds0, regmap);
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}
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static int st_lsm9ds0_i2c_remove(struct i2c_client *client)
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{
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return st_lsm9ds0_remove(i2c_get_clientdata(client));
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}
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static struct i2c_driver st_lsm9ds0_driver = {
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.driver = {
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.name = "st-lsm9ds0-i2c",
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.of_match_table = st_lsm9ds0_of_match,
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},
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.probe_new = st_lsm9ds0_i2c_probe,
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.remove = st_lsm9ds0_i2c_remove,
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.id_table = st_lsm9ds0_id_table,
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};
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module_i2c_driver(st_lsm9ds0_driver);
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MODULE_AUTHOR("Andy Shevchenko <andriy.shevchenko@linux.intel.com>");
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MODULE_DESCRIPTION("STMicroelectronics LSM9DS0 IMU I2C driver");
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MODULE_LICENSE("GPL v2");
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