include/linux/iio/afe/rescale.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2018 Axentia Technologies AB
   4  */
   5
   6 #ifndef __IIO_RESCALE_H__
   7 #define __IIO_RESCALE_H__
   8
   9 #include <linux/types.h>
  10 #include <linux/iio/iio.h>
  11
  12 struct device;
  13 struct rescale;
  14
  15 struct rescale_cfg {
  16         enum iio_chan_type type;
  17         int (*props)(struct device *dev, struct rescale *rescale);
  18 };
  19
  20 struct rescale {
  21         const struct rescale_cfg *cfg;
  22         struct iio_channel *source;
  23         struct iio_chan_spec chan;
  24         struct iio_chan_spec_ext_info *ext_info;
  25         bool chan_processed;
  26         s32 numerator;
  27         s32 denominator;
  28         s32 offset;
  29 };
  30
  31 int rescale_process_scale(struct rescale *rescale, int scale_type,
  32                           int *val, int *val2);
  33 int rescale_process_offset(struct rescale *rescale, int scale_type,
  34                            int scale, int scale2, int schan_off,
  35                            int *val, int *val2);
  36 #endif /* __IIO_RESCALE_H__ */