From e968d0950439c757b890f2a9543d9d17acf04be8 Mon Sep 17 00:00:00 2001 From: Michael Hennerich <michael.hennerich@analog.com> Date: Thu, 7 Oct 2010 14:24:33 +0200 Subject: [PATCH] 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> --- drivers/staging/iio/ring_generic.h | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) 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 -- 2.34.1