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/* SPDX-License-Identifier: GPL-2.0 */ #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__ */ |