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iio: introduce struct iio_scan_type

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This gives the channel scan_type a named type so that it can be used
to simplify code in later commits.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20240530-iio-add-support-for-multiple-scan-types-v3-1-cbc4acea2cfa@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
David Lechner
2024-05-30 10:14:08 -05:00
committed by Jonathan Cameron
parent 737413da87
commit fd7179ece0
1 changed files with 22 additions and 19 deletions
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41
include/linux/iio/iio.h
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@@ -173,6 +173,27 @@ struct iio_event_spec {
unsigned long mask_shared_by_all;
};
/**
* struct iio_scan_type - specification for channel data format in buffer
* @sign: 's' or 'u' to specify signed or unsigned
* @realbits: Number of valid bits of data
* @storagebits: Realbits + padding
* @shift: Shift right by this before masking out realbits.
* @repeat: Number of times real/storage bits repeats. When the
* repeat element is more than 1, then the type element in
* sysfs will show a repeat value. Otherwise, the number
* of repetitions is omitted.
* @endianness: little or big endian
*/
struct iio_scan_type {
char sign;
u8 realbits;
u8 storagebits;
u8 shift;
u8 repeat;
enum iio_endian endianness;
};
/**
* struct iio_chan_spec - specification of a single channel
* @type: What type of measurement is the channel making.
@@ -184,17 +205,6 @@ struct iio_event_spec {
* @scan_index: Monotonic index to give ordering in scans when read
* from a buffer.
* @scan_type: struct describing the scan type
* @scan_type.sign: 's' or 'u' to specify signed or unsigned
* @scan_type.realbits: Number of valid bits of data
* @scan_type.storagebits: Realbits + padding
* @scan_type.shift: Shift right by this before masking out
* realbits.
* @scan_type.repeat: Number of times real/storage bits repeats.
* When the repeat element is more than 1, then
* the type element in sysfs will show a repeat
* value. Otherwise, the number of repetitions
* is omitted.
* @scan_type.endianness: little or big endian
* @info_mask_separate: What information is to be exported that is specific to
* this channel.
* @info_mask_separate_available: What availability information is to be
@@ -245,14 +255,7 @@ struct iio_chan_spec {
int channel2;
unsigned long address;
int scan_index;
struct {
char sign;
u8 realbits;
u8 storagebits;
u8 shift;
u8 repeat;
enum iio_endian endianness;
} scan_type;
struct iio_scan_type scan_type;
long info_mask_separate;
long info_mask_separate_available;
long info_mask_shared_by_type;