iio: afe: rescale: expose scale processing function

In preparation for the addition of kunit tests, expose the logic responsible for combining channel scales.

Liam Beguin committed 4 years ago

Commit bc437f71 parent b59c0412 files · +60 −37Browse files

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	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	};
	29
	30	int rescale_process_scale(struct rescale *rescale, int scale_type,
	31	int val, int val2);
	32	#endif /* __IIO_RESCALE_H__ */

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