STRUCT IIO_INFO(9)

📦 version 7.3.1, in nixpkgs unstable

struct iio_info(9) 💖

Okay so welcome to the Kernel API Manual page for struct iio_info(9), bestie — this is the main-character struct holding the constant information about device. No cap, that’s literally the whole NAME vibe. 🎀

🌸 NAME 🌸

struct iio_info — constant information about device. That’s it, that’s the name, and it ate. 💅

✨ SYNOPSIS ✨

struct iio_info {
    const struct attribute_group    *event_attrs;
    const struct attribute_group    *attrs;
    int (*read_raw)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask);
    int (*read_raw_multi)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int max_len, int *vals, int *val_len, long mask);
    int (*read_avail)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask);
    int (*write_raw)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask);
    int (*read_label)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, char *label);
    int (*write_raw_get_fmt)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, long mask);
    int (*read_event_config)(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir);
    int (*write_event_config)(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, bool state);
    int (*read_event_value)(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int *val, int *val2);
    int (*write_event_value)(struct iio_dev *indio_dev, const struct iio_chan_spec *chan, enum iio_event_type type, enum iio_event_direction dir, enum iio_event_info info, int val, int val2);
    int (*read_event_label)(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, enum iio_event_type type, enum iio_event_direction dir, char *label);
    int (*validate_trigger)(struct iio_dev *indio_dev, struct iio_trigger *trig);
    int (*get_current_scan_type)(const struct iio_dev *indio_dev, const struct iio_chan_spec *chan);
    int (*update_scan_mode)(struct iio_dev *indio_dev, const unsigned long *scan_mask);
    int (*debugfs_reg_access)(struct iio_dev *indio_dev, unsigned int reg, unsigned int writeval, unsigned int *readval);
    int (*fwnode_xlate)(struct iio_dev *indio_dev, const struct fwnode_reference_args *iiospec);
    int (*hwfifo_set_watermark)(struct iio_dev *indio_dev, unsigned int val);
    int (*hwfifo_flush_to_buffer)(struct iio_dev *indio_dev, unsigned int count);
};

👑 Members 👑

  • event_attrs — event control attributes. Cute little control panel vibes ✨
  • attrs — general purpose device attributes. The everyday essentials 🫶
  • read_raw — function to request a value from the device. mask specifies which value. Note 0 means a reading of the channel in question. Return value will specify the type of value returned by the device. val and val2 will contain the elements making up the returned value. 🍓
  • read_raw_multi — function to return values from the device. mask specifies which value. Note 0 means a reading of the channel in question. Return value will specify the type of value returned by the device. vals pointer contain the elements making up the returned value. max_len specifies maximum number of elements vals pointer can contain. val_len is used to return length of valid elements in vals. 💖
  • read_avail — function to return the available values from the device. mask specifies which value. Note 0 means the available values for the channel in question. Return value specifies if a IIO_AVAIL_LIST or a IIO_AVAIL_RANGE is returned in vals. The type of the vals are returned in type and the number of vals is returned in length. For ranges, there are always three vals returned; min, step and max. For lists, all possible values are enumerated. 📋✨
  • write_raw — function to write a value to the device. Parameters are the same as for read_raw. ✍️
  • read_label — function to request label name for a specified label, for better channel identification. Slay, labels matter 💅
  • write_raw_get_fmt — callback function to query the expected format/precision. If not set by the driver, write_raw returns IIO_VAL_INT_PLUS_MICRO. 🔥
  • read_event_config — find out if the event is enabled. 🕵️‍♀️
  • write_event_config — set if the event is enabled. ✅
  • read_event_value — read a configuration value associated with the event. 📖
  • write_event_value — write a configuration value for the event. 🖊️
  • read_event_label — function to request label name for a specified label, for better event identification. 🏷️
  • validate_trigger — function to validate the trigger when the current trigger gets changed. 🚨
  • get_current_scan_type — must be implemented by drivers that use ext_scan_type in the channel spec to return the index of the currently active ext_scan type for a channel. 👑
  • update_scan_mode — function to configure device and scan buffer when channels have changed. 🌀
  • debugfs_reg_access — function to read or write register value of device. 🔧
  • fwnode_xlate — fwnode based function pointer to obtain channel specifier index. 🧚
  • hwfifo_set_watermark — function pointer to set the current hardware fifo watermark level; see hwfifo_* entries in Documentation/ABI/testing/sysfs-bus-iio for details on how the hardware fifo operates. 💧
  • hwfifo_flush_to_buffer — function pointer to flush the samples stored in the hardware fifo to the device buffer. The driver should not flush more than count samples. The function must return the number of samples flushed, 0 if no samples were flushed or a negative integer if no samples were flushed and there was an error. 🚽✨

💖 SEE ALSO 💖

Kernel file ./include/linux/iio/iio.h: struct iio_chan_spec_ext_info(9), struct iio_enum(9), IIO_ENUM(9), IIO_ENUM_AVAILABLE(9), struct iio_mount_matrix(9), IIO_MOUNT_MATRIX(9), struct iio_event_spec(9), IIO_SCAN_FORMAT_SIGNED_INT(9), IIO_SCAN_FORMAT_UNSIGNED_INT(9), IIO_SCAN_FORMAT_FLOAT(9), struct iio_scan_type(9), struct iio_chan_spec(9), iio_channel_has_info(9), iio_channel_has_available(9), struct iio_buffer_setup_ops(9), struct iio_dev(9), iio_device_register(9), devm_iio_device_register(9), iio_device_claim_direct(9), iio_device_release_direct(9), iio_device_try_claim_buffer_mode(9), iio_device_release_buffer_mode(9), IIO_DEV_ACQUIRE_DIRECT_MODE(9), IIO_DEV_ACQUIRE_FAILED(9), IIO_DEV_GUARD_CURRENT_MODE(9), iio_device_put(9), dev_to_iio_dev(9), iio_device_get(9), iio_device_set_parent(9), iio_device_set_drvdata(9), iio_device_get_drvdata(9), IIO_DECLARE_BUFFER_WITH_TS(9), IIO_DECLARE_DMA_BUFFER_WITH_TS(9), IIO_DECLARE_QUATERNION(9), iio_get_debugfs_dentry(9), iio_device_suspend_triggering(9), iio_device_resume_triggering(9), iio_get_current_scan_type(9), iio_get_masklength(9), iio_for_each_active_channel(9), IIO_DEGREE_TO_RAD(9), IIO_RAD_TO_DEGREE(9), IIO_G_TO_M_S_2(9), IIO_M_S_2_TO_G(9).

mwah 💋 — source: ./include/linux/iio, version/date: October 2026, page: struct iio_info(9). Byeee, go read the kernel docs bestie 🫶🌈

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