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| author | Michael Hennerich <michael.hennerich@analog.com> | 2010-10-07 14:24:33 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-07 10:07:01 -0700 |
| commit | e968d0950439c757b890f2a9543d9d17acf04be8 (patch) | |
| tree | 81088d0d67c0b8b94231fec4cae3ef5c9562dcde /drivers/staging/iio | |
| parent | 3ba2e4939d1d0426466de755a2435d2cbb311f8e (diff) | |
| download | linux-e968d0950439c757b890f2a9543d9d17acf04be8.tar.bz2 | |
staging: iio: ring_generic: provide IIO_CONST_ATTR_SCAN_EL_TYPE_WITH_SHIFT
Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Acked-by: Jonathan Cameron <jic23@cam.ac.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/iio')
| -rw-r--r-- | drivers/staging/iio/ring_generic.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/staging/iio/ring_generic.h b/drivers/staging/iio/ring_generic.h index 6975722616fa..8ecb1895cec2 100644 --- a/drivers/staging/iio/ring_generic.h +++ b/drivers/staging/iio/ring_generic.h @@ -292,6 +292,23 @@ ssize_t iio_scan_el_ts_show(struct device *dev, struct device_attribute *attr, **/ #define IIO_CONST_ATTR_SCAN_EL_TYPE(_name, _sign, _bits, _storagebits) \ IIO_CONST_ATTR(_name##_type, #_sign#_bits"/"#_storagebits); + +/** + * IIO_CONST_ATTR_SCAN_EL_TYPE_WITH_SHIFT - attr to specify the data format of a scan el + * @name: the scan el name (may be more general and cover a set of scan elements + * @_sign: either s or u for signed or unsigned + * @_bits: number of actual bits occuplied by the value + * @_storagebits: number of bits _bits is padded to when read out of buffer + * @_shiftbits: number of bits _shiftbits the result must be shifted + **/ +#define IIO_CONST_ATTR_SCAN_EL_TYPE_WITH_SHIFT(_name, _sign, _bits, \ + _storagebits, _shiftbits) \ + IIO_CONST_ATTR(_name##_type, #_sign#_bits"/"#_storagebits \ + ">>"#_shiftbits); + +#define IIO_SCAN_EL_TYPE_SIGNED 's' +#define IIO_SCAN_EL_TYPE_UNSIGNED 'u' + /* * These are mainly provided to allow for a change of implementation if a device * has a large number of scan elements |