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Commit 8310b86c authored by Jonathan Cameron's avatar Jonathan Cameron Committed by Greg Kroah-Hartman
Browse files

staging:iio:scan element types: introduce endian description to the data format. 



If not set in chan_spec, cpu endianness used.

Signed-off-by: default avatarJonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent a37b549e

drivers/staging/iio/iio.h

+8 −0
Original line number Diff line number Diff line
@@ -80,6 +80,12 @@ enum iio_chan_info_enum { 
	IIO_CHAN_INFO_QUADRATURE_CORRECTION_RAW_SEPARATE,

};



enum iio_endian {

	IIO_CPU,

	IIO_BE,

	IIO_LE,

};



/**

 * struct iio_chan_spec - specification of a single channel

 * @type:		What type of measurement is the channel making.
@@ -95,6 +101,7 @@ enum iio_chan_info_enum { 
 *			storage_bits:	Realbits + padding

 *			shift:		Shift right by this before masking out

 *					realbits.

 *			endianness:	little or big endian

 * @info_mask:		What information is to be exported about this channel.

 *			This includes calibbias, scale etc.

 * @event_mask:	What events can this channel produce.
@@ -123,6 +130,7 @@ struct iio_chan_spec { 
		u8	realbits;

		u8	storagebits;

		u8	shift;

		enum iio_endian endianness;

	} scan_type;

	long			info_mask;

	long			event_mask;

drivers/staging/iio/industrialio-ring.c

+14 −1
Original line number Diff line number Diff line
@@ -25,6 +25,10 @@ 
#include "sysfs.h"

#include "ring_generic.h"



static const char * const iio_endian_prefix[] = {

	[IIO_BE] = "be",

	[IIO_LE] = "le",

};



/**

 * iio_ring_read_first_n_outer() - chrdev read for ring buffer access
@@ -96,7 +100,16 @@ static ssize_t iio_show_fixed_type(struct device *dev, 
				   char *buf)

{

	struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);

	return sprintf(buf, "%c%d/%d>>%u\n",

	u8 type = this_attr->c->scan_type.endianness;



	if (type == IIO_CPU) {

		if (__LITTLE_ENDIAN)

			type = IIO_LE;

		else

			type = IIO_BE;

	}

	return sprintf(buf, "%s:%c%d/%d>>%u\n",

		       iio_endian_prefix[type],

		       this_attr->c->scan_type.sign,

		       this_attr->c->scan_type.realbits,

		       this_attr->c->scan_type.storagebits,