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>
diff --git a/drivers/staging/iio/iio.h b/drivers/staging/iio/iio.h
index f423870..daaea94 100644
--- a/drivers/staging/iio/iio.h
+++ b/drivers/staging/iio/iio.h
@@ -80,6 +80,12 @@
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 @@
* 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 @@
u8 realbits;
u8 storagebits;
u8 shift;
+ enum iio_endian endianness;
} scan_type;
long info_mask;
long event_mask;
diff --git a/drivers/staging/iio/industrialio-ring.c b/drivers/staging/iio/industrialio-ring.c
index e844246..23967d4 100644
--- a/drivers/staging/iio/industrialio-ring.c
+++ b/drivers/staging/iio/industrialio-ring.c
@@ -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 @@
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,