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IIO: core: Modify scan element type

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The current scan element type uses the following format:
  [be|le]:[s|u]bits/storagebits[>>shift].
To specify multiple elements in this type, added a repeat value.
So new format is:
  [be|le]:[s|u]bits/storagebitsXr[>>shift].
Here r is specifying how may times, real/storage bits are repeating.

When X is value is 0 or 1, then repeat value is not used in the format,
and it will be same as existing format.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Srinivas Pandruvada
2014-04-29 00:51:00 +01:00
committed by Jonathan Cameron
parent 9fbfb4b37e
commit 0ee8546ac0
2 changed files with 42 additions and 6 deletions
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41
drivers/iio/industrialio-buffer.c
View File

@@ -150,7 +150,16 @@ static ssize_t iio_show_fixed_type(struct device *dev,
type = IIO_BE;
#endif
}
return sprintf(buf, "%s:%c%d/%d>>%u\n",
if (this_attr->c->scan_type.repeat > 1)
return sprintf(buf, "%s:%c%d/%dX%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,
this_attr->c->scan_type.repeat,
this_attr->c->scan_type.shift);
else
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,
@@ -475,14 +484,22 @@ static int iio_compute_scan_bytes(struct iio_dev *indio_dev,
for_each_set_bit(i, mask,
indio_dev->masklength) {
ch = iio_find_channel_from_si(indio_dev, i);
length = ch->scan_type.storagebits / 8;
if (ch->scan_type.repeat > 1)
length = ch->scan_type.storagebits / 8 *
ch->scan_type.repeat;
else
length = ch->scan_type.storagebits / 8;
bytes = ALIGN(bytes, length);
bytes += length;
}
if (timestamp) {
ch = iio_find_channel_from_si(indio_dev,
indio_dev->scan_index_timestamp);
length = ch->scan_type.storagebits / 8;
if (ch->scan_type.repeat > 1)
length = ch->scan_type.storagebits / 8 *
ch->scan_type.repeat;
else
length = ch->scan_type.storagebits / 8;
bytes = ALIGN(bytes, length);
bytes += length;
}
@@ -959,7 +976,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
indio_dev->masklength,
in_ind + 1);
ch = iio_find_channel_from_si(indio_dev, in_ind);
length = ch->scan_type.storagebits/8;
if (ch->scan_type.repeat > 1)
length = ch->scan_type.storagebits / 8 *
ch->scan_type.repeat;
else
length = ch->scan_type.storagebits / 8;
/* Make sure we are aligned */
in_loc += length;
if (in_loc % length)
@@ -971,7 +992,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
goto error_clear_mux_table;
}
ch = iio_find_channel_from_si(indio_dev, in_ind);
length = ch->scan_type.storagebits/8;
if (ch->scan_type.repeat > 1)
length = ch->scan_type.storagebits / 8 *
ch->scan_type.repeat;
else
length = ch->scan_type.storagebits / 8;
if (out_loc % length)
out_loc += length - out_loc % length;
if (in_loc % length)
@@ -992,7 +1017,11 @@ static int iio_buffer_update_demux(struct iio_dev *indio_dev,
}
ch = iio_find_channel_from_si(indio_dev,
indio_dev->scan_index_timestamp);
length = ch->scan_type.storagebits/8;
if (ch->scan_type.repeat > 1)
length = ch->scan_type.storagebits / 8 *
ch->scan_type.repeat;
else
length = ch->scan_type.storagebits / 8;
if (out_loc % length)
out_loc += length - out_loc % length;
if (in_loc % length)