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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * STMicroelectronics sensors i2c library driver4 *5 * Copyright 2012-2013 STMicroelectronics Inc.6 *7 * Denis Ciocca <denis.ciocca@st.com>8 */9 10#include <linux/i2c.h>11#include <linux/kernel.h>12#include <linux/module.h>13#include <linux/iio/iio.h>14#include <linux/regmap.h>15 16#include <linux/iio/common/st_sensors_i2c.h>17 18#define ST_SENSORS_I2C_MULTIREAD 0x8019 20static const struct regmap_config st_sensors_i2c_regmap_config = {21 .reg_bits = 8,22 .val_bits = 8,23};24 25static const struct regmap_config st_sensors_i2c_regmap_multiread_bit_config = {26 .reg_bits = 8,27 .val_bits = 8,28 .read_flag_mask = ST_SENSORS_I2C_MULTIREAD,29};30 31/*32 * st_sensors_i2c_configure() - configure I2C interface33 * @indio_dev: IIO device reference.34 * @client: i2c client reference.35 *36 * Return: 0 on success, else a negative error code.37 */38int st_sensors_i2c_configure(struct iio_dev *indio_dev,39 struct i2c_client *client)40{41 struct st_sensor_data *sdata = iio_priv(indio_dev);42 const struct regmap_config *config;43 44 if (sdata->sensor_settings->multi_read_bit)45 config = &st_sensors_i2c_regmap_multiread_bit_config;46 else47 config = &st_sensors_i2c_regmap_config;48 49 sdata->regmap = devm_regmap_init_i2c(client, config);50 if (IS_ERR(sdata->regmap)) {51 dev_err(&client->dev, "Failed to register i2c regmap (%ld)\n",52 PTR_ERR(sdata->regmap));53 return PTR_ERR(sdata->regmap);54 }55 56 i2c_set_clientdata(client, indio_dev);57 58 indio_dev->name = client->name;59 60 sdata->irq = client->irq;61 62 return 0;63}64EXPORT_SYMBOL_NS(st_sensors_i2c_configure, IIO_ST_SENSORS);65 66MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");67MODULE_DESCRIPTION("STMicroelectronics ST-sensors i2c driver");68MODULE_LICENSE("GPL v2");69