// SPDX-License-Identifier: GPL-2.0-only
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/*
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* STMicroelectronics sensors i2c library 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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#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/iio.h>
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#include <linux/regmap.h>
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#include <linux/iio/common/st_sensors_i2c.h>
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#define ST_SENSORS_I2C_MULTIREAD 0x80
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static const struct regmap_config st_sensors_i2c_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 regmap_config st_sensors_i2c_regmap_multiread_bit_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.read_flag_mask = ST_SENSORS_I2C_MULTIREAD,
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};
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/*
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* st_sensors_i2c_configure() - configure I2C interface
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* @indio_dev: IIO device reference.
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* @client: i2c client reference.
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*
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* Return: 0 on success, else a negative error code.
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*/
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int st_sensors_i2c_configure(struct iio_dev *indio_dev,
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struct i2c_client *client)
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{
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struct st_sensor_data *sdata = iio_priv(indio_dev);
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const struct regmap_config *config;
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if (sdata->sensor_settings->multi_read_bit)
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config = &st_sensors_i2c_regmap_multiread_bit_config;
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else
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config = &st_sensors_i2c_regmap_config;
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sdata->regmap = devm_regmap_init_i2c(client, config);
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if (IS_ERR(sdata->regmap)) {
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dev_err(&client->dev, "Failed to register i2c regmap (%ld)\n",
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PTR_ERR(sdata->regmap));
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return PTR_ERR(sdata->regmap);
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}
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i2c_set_clientdata(client, indio_dev);
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indio_dev->name = client->name;
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sdata->dev = &client->dev;
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sdata->irq = client->irq;
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return 0;
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}
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EXPORT_SYMBOL(st_sensors_i2c_configure);
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MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
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MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");
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MODULE_LICENSE("GPL v2");
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