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// SPDX-License-Identifier: GPL-2.0-only
/*
* STMicroelectronics sensors i2c library driver
*
* Copyright 2012-2013 STMicroelectronics Inc.
*
* Denis Ciocca <denis.ciocca@st.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/iio/iio.h>
#include <linux/regmap.h>
#include <linux/iio/common/st_sensors_i2c.h>
#define ST_SENSORS_I2C_MULTIREAD 0x80
static const struct regmap_config st_sensors_i2c_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static const struct regmap_config st_sensors_i2c_regmap_multiread_bit_config = {
.reg_bits = 8,
.val_bits = 8,
.read_flag_mask = ST_SENSORS_I2C_MULTIREAD,
};
/*
* st_sensors_i2c_configure() - configure I2C interface
* @indio_dev: IIO device reference.
* @client: i2c client reference.
*
* Return: 0 on success, else a negative error code.
*/
int st_sensors_i2c_configure(struct iio_dev *indio_dev,
struct i2c_client *client)
{
struct st_sensor_data *sdata = iio_priv(indio_dev);
const struct regmap_config *config;
if (sdata->sensor_settings->multi_read_bit)
config = &st_sensors_i2c_regmap_multiread_bit_config;
else
config = &st_sensors_i2c_regmap_config;
sdata->regmap = devm_regmap_init_i2c(client, config);
if (IS_ERR(sdata->regmap)) {
dev_err(&client->dev, "Failed to register i2c regmap (%ld)\n",
PTR_ERR(sdata->regmap));
return PTR_ERR(sdata->regmap);
}
i2c_set_clientdata(client, indio_dev);
indio_dev->dev.parent = &client->dev;
indio_dev->name = client->name;
sdata->dev = &client->dev;
sdata->irq = client->irq;
return 0;
}
EXPORT_SYMBOL(st_sensors_i2c_configure);
MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
MODULE_LICENSE("GPL v2");
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