| 1 | /* SPDX-License-Identifier: GPL-2.0-or-later */ |
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| 2 | #ifndef _IIO_BACKEND_H_ |
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| 3 | #define _IIO_BACKEND_H_ |
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| 4 | |
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| 5 | #include <linux/types.h> |
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| 6 | |
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| 7 | struct fwnode_handle; |
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| 8 | struct iio_backend; |
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| 9 | struct device; |
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| 10 | struct iio_dev; |
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| 11 | |
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| 12 | enum iio_backend_data_type { |
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| 13 | IIO_BACKEND_TWOS_COMPLEMENT, |
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| 14 | IIO_BACKEND_OFFSET_BINARY, |
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| 15 | IIO_BACKEND_DATA_TYPE_MAX |
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| 16 | }; |
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| 17 | |
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| 18 | /** |
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| 19 | * struct iio_backend_data_fmt - Backend data format |
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| 20 | * @type: Data type. |
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| 21 | * @sign_extend: Bool to tell if the data is sign extended. |
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| 22 | * @enable: Enable/Disable the data format module. If disabled, |
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| 23 | * not formatting will happen. |
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| 24 | */ |
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| 25 | struct iio_backend_data_fmt { |
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| 26 | enum iio_backend_data_type type; |
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| 27 | bool sign_extend; |
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| 28 | bool enable; |
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| 29 | }; |
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| 30 | |
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| 31 | /** |
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| 32 | * struct iio_backend_ops - operations structure for an iio_backend |
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| 33 | * @enable: Enable backend. |
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| 34 | * @disable: Disable backend. |
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| 35 | * @chan_enable: Enable one channel. |
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| 36 | * @chan_disable: Disable one channel. |
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| 37 | * @data_format_set: Configure the data format for a specific channel. |
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| 38 | * @request_buffer: Request an IIO buffer. |
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| 39 | * @free_buffer: Free an IIO buffer. |
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| 40 | **/ |
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| 41 | struct iio_backend_ops { |
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| 42 | int (*enable)(struct iio_backend *back); |
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| 43 | void (*disable)(struct iio_backend *back); |
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| 44 | int (*chan_enable)(struct iio_backend *back, unsigned int chan); |
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| 45 | int (*chan_disable)(struct iio_backend *back, unsigned int chan); |
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| 46 | int (*data_format_set)(struct iio_backend *back, unsigned int chan, |
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| 47 | const struct iio_backend_data_fmt *data); |
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| 48 | struct iio_buffer *(*request_buffer)(struct iio_backend *back, |
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| 49 | struct iio_dev *indio_dev); |
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| 50 | void (*free_buffer)(struct iio_backend *back, |
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| 51 | struct iio_buffer *buffer); |
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| 52 | }; |
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| 53 | |
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| 54 | int iio_backend_chan_enable(struct iio_backend *back, unsigned int chan); |
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| 55 | int iio_backend_chan_disable(struct iio_backend *back, unsigned int chan); |
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| 56 | int devm_iio_backend_enable(struct device *dev, struct iio_backend *back); |
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| 57 | int iio_backend_data_format_set(struct iio_backend *back, unsigned int chan, |
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| 58 | const struct iio_backend_data_fmt *data); |
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| 59 | int devm_iio_backend_request_buffer(struct device *dev, |
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| 60 | struct iio_backend *back, |
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| 61 | struct iio_dev *indio_dev); |
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| 62 | |
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| 63 | void *iio_backend_get_priv(const struct iio_backend *conv); |
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| 64 | struct iio_backend *devm_iio_backend_get(struct device *dev, const char *name); |
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| 65 | struct iio_backend * |
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| 66 | __devm_iio_backend_get_from_fwnode_lookup(struct device *dev, |
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| 67 | struct fwnode_handle *fwnode); |
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| 68 | |
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| 69 | int devm_iio_backend_register(struct device *dev, |
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| 70 | const struct iio_backend_ops *ops, void *priv); |
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| 71 | |
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| 72 | #endif |
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| 73 | |
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