// 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->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");