1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __SSP_IIO_SENSOR_H__
3#define __SSP_IIO_SENSOR_H__
4
5#define SSP_CHANNEL_AG(_type, _mod, _index) \
6{ \
7		.type = _type,\
8		.modified = 1,\
9		.channel2 = _mod,\
10		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ),\
11		.scan_index = _index,\
12		.scan_type = {\
13			.sign = 's',\
14			.realbits = 16,\
15			.storagebits = 16,\
16			.shift = 0,\
17			.endianness = IIO_LE,\
18		},\
19}
20
21/* It is defined here as it is a mixed timestamp */
22#define SSP_CHAN_TIMESTAMP(_si) {					\
23	.type = IIO_TIMESTAMP,						\
24	.channel = -1,							\
25	.scan_index = _si,						\
26	.scan_type = {							\
27		.sign = 's',						\
28		.realbits = 64,						\
29		.storagebits = 64,					\
30		},							\
31}
32
33#define SSP_MS_PER_S			1000
34#define SSP_INVERTED_SCALING_FACTOR	1000000U
35
36#define SSP_FACTOR_WITH_MS \
37	(SSP_INVERTED_SCALING_FACTOR * SSP_MS_PER_S)
38
39int ssp_common_buffer_postenable(struct iio_dev *indio_dev);
40
41int ssp_common_buffer_postdisable(struct iio_dev *indio_dev);
42
43int ssp_common_process_data(struct iio_dev *indio_dev, void *buf,
44			    unsigned int len, int64_t timestamp);
45
46/* Converts time in ms to frequency */
47static inline void ssp_convert_to_freq(u32 time, int *integer_part,
48				       int *fractional)
49{
50	if (time == 0) {
51		*fractional = 0;
52		*integer_part = 0;
53		return;
54	}
55
56	*integer_part = SSP_FACTOR_WITH_MS / time;
57	*fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR;
58	*integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR;
59}
60
61/* Converts frequency to time in ms */
62static inline int ssp_convert_to_time(int integer_part, int fractional)
63{
64	u64 value;
65
66	value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional;
67	if (value == 0)
68		return 0;
69
70	return div64_u64((u64)SSP_FACTOR_WITH_MS, value);
71}
72#endif /* __SSP_IIO_SENSOR_H__ */
73