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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 | |
67460e8c | 33 | #define SSP_INVERTED_SCALING_FACTOR 1000000U |
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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; | |
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56 | *fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR; |
57 | *integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR; | |
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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 | ||
67460e8c | 65 | value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional; |
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66 | if (value == 0) |
67 | return 0; | |
68 | ||
67460e8c | 69 | return div64_u64((u64)SSP_FACTOR_WITH_MS, value); |
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70 | } |
71 | #endif /* __SSP_IIO_SENSOR_H__ */ |