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iio:bma180: Prepare for accelerometer channels with different resolutions 

allow to specify channels resolution and compute shift assuming
16-bit registers and MSB allocation

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
Cc: Oleksandr Kravchenko <o.v.kravchenko@globallogic.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Peter Meerwald 2014-08-19 23:43:00 +01:00 committed by Jonathan Cameron
parent c1949ec18e
commit 6377aa496a
1 changed files with 6 additions and 6 deletions
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12
drivers/iio/accel/bma180.c
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@ -476,7 +476,7 @@ static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
{ },
};
#define BMA180_ACC_CHANNEL(_axis) { \
#define BMA180_ACC_CHANNEL(_axis, _bits) { \
.type = IIO_ACCEL, \
.modified = 1, \
.channel2 = IIO_MOD_##_axis, \
@ -486,9 +486,9 @@ static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
.scan_index = AXIS_##_axis, \
.scan_type = { \
.sign = 's', \
.realbits = 14, \
.realbits = _bits, \
.storagebits = 16, \
.shift = 2, \
.shift = 16 - _bits, \
}, \
.ext_info = bma180_ext_info, \
}
@ -506,9 +506,9 @@ static const struct iio_chan_spec_ext_info bma180_ext_info[] = {
}
static const struct iio_chan_spec bma180_channels[] = {
BMA180_ACC_CHANNEL(X),
BMA180_ACC_CHANNEL(Y),
BMA180_ACC_CHANNEL(Z),
BMA180_ACC_CHANNEL(X, 14),
BMA180_ACC_CHANNEL(Y, 14),
BMA180_ACC_CHANNEL(Z, 14),
BMA180_TEMP_CHANNEL,
IIO_CHAN_SOFT_TIMESTAMP(4),
};