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