| #ifndef __SSP_IIO_SENSOR_H__ |
| #define __SSP_IIO_SENSOR_H__ |
| |
| #define SSP_CHANNEL_AG(_type, _mod, _index) \ |
| { \ |
| .type = _type,\ |
| .modified = 1,\ |
| .channel2 = _mod,\ |
| .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ),\ |
| .scan_index = _index,\ |
| .scan_type = {\ |
| .sign = 's',\ |
| .realbits = 16,\ |
| .storagebits = 16,\ |
| .shift = 0,\ |
| .endianness = IIO_LE,\ |
| },\ |
| } |
| |
| /* It is defined here as it is a mixed timestamp */ |
| #define SSP_CHAN_TIMESTAMP(_si) { \ |
| .type = IIO_TIMESTAMP, \ |
| .channel = -1, \ |
| .scan_index = _si, \ |
| .scan_type = { \ |
| .sign = 's', \ |
| .realbits = 64, \ |
| .storagebits = 64, \ |
| }, \ |
| } |
| |
| #define SSP_MS_PER_S 1000 |
| #define SSP_INVERTED_SCALING_FACTOR 1000000U |
| |
| #define SSP_FACTOR_WITH_MS \ |
| (SSP_INVERTED_SCALING_FACTOR * SSP_MS_PER_S) |
| |
| int ssp_common_buffer_postenable(struct iio_dev *indio_dev); |
| |
| int ssp_common_buffer_postdisable(struct iio_dev *indio_dev); |
| |
| int ssp_common_process_data(struct iio_dev *indio_dev, void *buf, |
| unsigned int len, int64_t timestamp); |
| |
| /* Converts time in ms to frequency */ |
| static inline void ssp_convert_to_freq(u32 time, int *integer_part, |
| int *fractional) |
| { |
| if (time == 0) { |
| *fractional = 0; |
| *integer_part = 0; |
| return; |
| } |
| |
| *integer_part = SSP_FACTOR_WITH_MS / time; |
| *fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR; |
| *integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR; |
| } |
| |
| /* Converts frequency to time in ms */ |
| static inline int ssp_convert_to_time(int integer_part, int fractional) |
| { |
| u64 value; |
| |
| value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional; |
| if (value == 0) |
| return 0; |
| |
| return div64_u64((u64)SSP_FACTOR_WITH_MS, value); |
| } |
| #endif /* __SSP_IIO_SENSOR_H__ */ |