0x10000040 ";ˆl–Ým_J*j"Tâ‚À»q§”Å£Ì ƒh¹ÀÎ;1 =ˆÈÌ „€mÿÇÀÎ?÷=/* SPDX-License-Identifier: GPL-2.0-only */ /* The industrial I/O core * * Copyright (c) 2008 Jonathan Cameron */ #ifndef _INDUSTRIAL_IO_H_ #define _INDUSTRIAL_IO_H_ #include #include #include #include /* IIO TODO LIST */ /* * Provide means of adjusting timer accuracy. * Currently assumes nano seconds. */ enum iio_shared_by { IIO_SEPARATE, IIO_SHARED_BY_TYPE, IIO_SHARED_BY_DIR, IIO_SHARED_BY_ALL }; enum iio_endian { IIO_CPU, IIO_BE, IIO_LE, }; struct iio_chan_spec; struct iio_dev; /** * struct iio_chan_spec_ext_info - Extended channel info attribute * @name: Info attribute name * @shared: Whether this attribute is shared between all channels. * @read: Read callback for this info attribute, may be NULL. * @write: Write callback for this info attribute, may be NULL. * @private: Data private to the driver. */ struct iio_chan_spec_ext_info { const char *name; enum iio_shared_by shared; ssize_t (*read)(struct iio_dev *, uintptr_t private, struct iio_chan_spec const *, char *buf); ssize_t (*write)(struct iio_dev *, uintptr_t private, struct iio_chan_spec const *, const char *buf, size_t len); uintptr_t private; }; /** * struct iio_enum - Enum channel info attribute * @items: An array of strings. * @num_items: Length of the item array. * @set: Set callback function, may be NULL. * @get: Get callback function, may be NULL. * * The iio_enum struct can be used to implement enum style channel attributes. * Enum style attributes are those which have a set of strings which map to * unsigned integer values. The IIO enum helper code takes care of mapping * between value and string as well as generating a "_available" file which * contains a list of all available items. The set callback will be called when * the attribute is updated. The last parameter is the index to the newly * activated item. The get callback will be used to query the currently active * item and is supposed to return the index for it. */ struct iio_enum { const char * const *items; unsigned int num_items; int (*set)(struct iio_dev *, const struct iio_chan_spec *, unsigned int); int (*get)(struct iio_dev *, const struct iio_chan_spec *); }; ssize_t iio_enum_available_read(struct iio_dev *indio_dev, uintptr_t priv, const struct iio_chan_spec *chan, char *buf); ssize_t iio_enum_read(struct iio_dev *indio_dev, uintptr_t priv, const struct iio_chan_spec *chan, char *buf); ssize_t iio_enum_write(struct iio_dev *indio_dev, uintptr_t priv, const struct iio_chan_spec *chan, const char *buf, size_t len); /** * IIO_ENUM() - Initialize enum extended channel attribute * @_name: Attribute name * @_shared: Whether the attribute is shared between all channels * @_e: Pointer to an iio_enum struct * * This should usually be used together with IIO_ENUM_AVAILABLE() */ #define IIO_ENUM(_name, _shared, _e) \ { \ .name = (_name), \ .shared = (_shared), \ .read = iio_enum_read, \ .write = iio_enum_write, \ .private = (uintptr_t)(_e), \ } /** * IIO_ENUM_AVAILABLE() - Initialize enum available extended channel attribute * @_name: Attribute name ("_available" will be appended to the name) * @_shared: Whether the attribute is shared between all channels * @_e: Pointer to an iio_enum struct * * Creates a read only attribute which lists all the available enum items in a * space separated list. This should usually be used together with IIO_ENUM() */ #define IIO_ENUM_AVAILABLE(_name, _shared, _e) \ { \ .name = (_name "_available"), \ .shared = _shared, \ .read = iio_enum_available_read, \ .private = (uintptr_t)(_e), \ } /** * struct iio_mount_matrix - iio mounting matrix * @rotation: 3 dimensional space rotation matrix defining sensor alignment with * main hardware */ struct iio_mount_matrix { const char *rotation[9]; }; ssize_t iio_show_mount_matrix(struct iio_dev *indio_dev, uintptr_t priv, const struct iio_chan_spec *