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staging:iio:ad7780: Mark channels as unsigned 

The values reported by the AD7780 are unsigned with a binary offset:

	0x000000 is negative fullscale
	0x800000 is zeroscale
	0xffffff is positive fullscale

So mark the channel in the channel spec as unsigned rather than signed.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2012-08-10 17:36:00 +01:00 committed by Jonathan Cameron
parent 4fcbcf95b7
commit 70e01880a9
1 changed files with 6 additions and 4 deletions
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10
drivers/staging/iio/adc/ad7780.c
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@ -131,9 +131,10 @@ static const struct ad7780_chip_info ad7780_chip_info_tbl[] = {
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SHARED_BIT,
IIO_CHAN_INFO_SCALE_SHARED_BIT |
IIO_CHAN_INFO_OFFSET_SHARED_BIT,
.scan_type = {
.sign = 's',
.sign = 'u',
.realbits = 24,
.storagebits = 32,
.shift = 8,
@ -146,9 +147,10 @@ static const struct ad7780_chip_info ad7780_chip_info_tbl[] = {
.indexed = 1,
.channel = 0,
.info_mask = IIO_CHAN_INFO_RAW_SEPARATE_BIT |
IIO_CHAN_INFO_SCALE_SHARED_BIT,
IIO_CHAN_INFO_SCALE_SHARED_BIT |
IIO_CHAN_INFO_OFFSET_SHARED_BIT,
.scan_type = {
.sign = 's',
.sign = 'u',
.realbits = 20,
.storagebits = 32,
.shift = 12,