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

If not set in chan_spec, cpu endianness used.

Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
hifive-unleashed-5.1
Jonathan Cameron 2011-09-02 17:14:36 +01:00 committed by Greg Kroah-Hartman
parent a37b549ec6
commit 8310b86c3c
2 changed files with 22 additions and 1 deletions
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8
drivers/staging/iio/iio.h
View File

@ -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;

15
drivers/staging/iio/industrialio-ring.c
View File

@ -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,