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