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/* SPDX-License-Identifier: GPL-2.0-or-later */
#ifndef _IIO_BACKEND_H_
#define _IIO_BACKEND_H_
#include <linux/types.h>
struct fwnode_handle;
struct iio_backend;
struct device;
struct iio_dev;
enum iio_backend_data_type {
IIO_BACKEND_TWOS_COMPLEMENT,
IIO_BACKEND_OFFSET_BINARY,
IIO_BACKEND_DATA_TYPE_MAX
};
/**
* struct iio_backend_data_fmt - Backend data format
* @type: Data type.
* @sign_extend: Bool to tell if the data is sign extended.
* @enable: Enable/Disable the data format module. If disabled,
* not formatting will happen.
*/
struct iio_backend_data_fmt {
enum iio_backend_data_type type;
bool sign_extend;
bool enable;
};
/**
* struct iio_backend_ops - operations structure for an iio_backend
* @enable: Enable backend.
* @disable: Disable backend.
* @chan_enable: Enable one channel.
* @chan_disable: Disable one channel.
* @data_format_set: Configure the data format for a specific channel.
* @request_buffer: Request an IIO buffer.
* @free_buffer: Free an IIO buffer.
**/
struct iio_backend_ops {
int (*enable)(struct iio_backend *back);
void (*disable)(struct iio_backend *back);
int (*chan_enable)(struct iio_backend *back, unsigned int chan);
int (*chan_disable)(struct iio_backend *back, unsigned int chan);
int (*data_format_set)(struct iio_backend *back, unsigned int chan,
const struct iio_backend_data_fmt *data);
struct iio_buffer *(*request_buffer)(struct iio_backend *back,
struct iio_dev *indio_dev);
void (*free_buffer)(struct iio_backend *back,
struct iio_buffer *buffer);
};
int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan);
int iio_backend_chan_disable(struct iio_backend *back, unsigned int chan);
int devm_iio_backend_enable(struct device *dev, struct iio_backend *back);
int iio_backend_data_format_set(struct iio_backend *back, unsigned int chan,
const struct iio_backend_data_fmt *data);
int devm_iio_backend_request_buffer(struct device *dev,
struct iio_backend *back,
struct iio_dev *indio_dev);
void *iio_backend_get_priv(const struct iio_backend *conv);
struct iio_backend *devm_iio_backend_get(struct device *dev, const char *name);
struct iio_backend *
__devm_iio_backend_get_from_fwnode_lookup(struct device *dev,
struct fwnode_handle *fwnode);
int devm_iio_backend_register(struct device *dev,
const struct iio_backend_ops *ops, void *priv);
#endif