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| author |  Liam Beguin <liambeguin@gmail.com>
| 2022-02-12 21:57:30 -0500 |
|---|---|---|
| committer |  Jonathan Cameron <Jonathan.Cameron@huawei.com>
| 2022-02-27 13:37:49 +0000 |
| commit | bc437f7515f5e14aec9f2801412d9ea48116a97d (patch) | |
| tree | 6dfdfc527dc2a50681355825c48a392e00f85e79 /include/linux/iio | |
| parent | iio: frequency: admv4420.c: Add support for ADMV4420 (diff) | |
| download | linux-bc437f7515f5e14aec9f2801412d9ea48116a97d.tar.gz linux-bc437f7515f5e14aec9f2801412d9ea48116a97d.tar.bz2 linux-bc437f7515f5e14aec9f2801412d9ea48116a97d.zip | |
iio: afe: rescale: expose scale processing function
In preparation for the addition of kunit tests, expose the logic
responsible for combining channel scales.
Signed-off-by: Liam Beguin <liambeguin@gmail.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20220213025739.2561834-2-liambeguin@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'include/linux/iio')
| -rw-r--r-- | include/linux/iio/afe/rescale.h | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/include/linux/iio/afe/rescale.h b/include/linux/iio/afe/rescale.h new file mode 100644 index 000000000000..8a2eb34af327 --- /dev/null +++ b/include/linux/iio/afe/rescale.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2018 Axentia Technologies AB + */ + +#ifndef __IIO_RESCALE_H__ +#define __IIO_RESCALE_H__ + +#include <linux/types.h> +#include <linux/iio/iio.h> + +struct device; +struct rescale; + +struct rescale_cfg { + enum iio_chan_type type; + int (*props)(struct device *dev, struct rescale *rescale); +}; + +struct rescale { + const struct rescale_cfg *cfg; + struct iio_channel *source; + struct iio_chan_spec chan; + struct iio_chan_spec_ext_info *ext_info; + bool chan_processed; + s32 numerator; + s32 denominator; +}; + +int rescale_process_scale(struct rescale *rescale, int scale_type, + int *val, int *val2); +#endif /* __IIO_RESCALE_H__ */ |