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2d7768a872
The I2C devices that make up the STMicroelectronics MEMS sensors may be sneakily enabled by cleverly giving the device node the same name as a string match from the platform device ID table. However the right method is to use the compatible string. On detection, the ST sensors use the ID string to probe and instatiate the right sensor driver, so pass the kernel-internal ID string in the .data field of the OF match table, and set the I2C client name to this name when a compatible match is used. This avoids having misc Linux-specific strings floating around in the device tree. Cc: Lee Jones <lee.jones@linaro.org> Cc: Denis CIOCCA <denis.ciocca@st.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
/*
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* STMicroelectronics magnetometers driver
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*
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* Copyright 2012-2013 STMicroelectronics Inc.
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*
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* Denis Ciocca <denis.ciocca@st.com>
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*
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* Licensed under the GPL-2.
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*/
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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/i2c.h>
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#include <linux/iio/iio.h>
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#include <linux/iio/common/st_sensors.h>
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#include <linux/iio/common/st_sensors_i2c.h>
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#include "st_magn.h"
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#ifdef CONFIG_OF
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static const struct of_device_id st_magn_of_match[] = {
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{
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.compatible = "st,lsm303dlhc-magn",
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.data = LSM303DLHC_MAGN_DEV_NAME,
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},
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{
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.compatible = "st,lsm303dlm-magn",
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.data = LSM303DLM_MAGN_DEV_NAME,
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},
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{
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.compatible = "st,lis3mdl-magn",
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.data = LIS3MDL_MAGN_DEV_NAME,
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, st_magn_of_match);
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#else
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#define st_magn_of_match NULL
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#endif
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static int st_magn_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 iio_dev *indio_dev;
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struct st_sensor_data *mdata;
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int err;
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indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
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if (!indio_dev)
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return -ENOMEM;
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mdata = iio_priv(indio_dev);
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mdata->dev = &client->dev;
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st_sensors_of_i2c_probe(client, st_magn_of_match);
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st_sensors_i2c_configure(indio_dev, client, mdata);
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err = st_magn_common_probe(indio_dev, NULL);
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if (err < 0)
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return err;
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return 0;
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}
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static int st_magn_i2c_remove(struct i2c_client *client)
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{
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struct iio_dev *indio_dev = i2c_get_clientdata(client);
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st_magn_common_remove(indio_dev);
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return 0;
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}
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static const struct i2c_device_id st_magn_id_table[] = {
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{ LSM303DLHC_MAGN_DEV_NAME },
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{ LSM303DLM_MAGN_DEV_NAME },
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{ LIS3MDL_MAGN_DEV_NAME },
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{},
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};
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MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
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static struct i2c_driver st_magn_driver = {
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.driver = {
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.owner = THIS_MODULE,
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.name = "st-magn-i2c",
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.of_match_table = of_match_ptr(st_magn_of_match),
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},
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.probe = st_magn_i2c_probe,
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.remove = st_magn_i2c_remove,
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.id_table = st_magn_id_table,
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};
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module_i2c_driver(st_magn_driver);
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
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MODULE_LICENSE("GPL v2");
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