/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __SSP_IIO_SENSOR_H__
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#define __SSP_IIO_SENSOR_H__
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#define SSP_CHANNEL_AG(_type, _mod, _index) \
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{ \
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.type = _type,\
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.modified = 1,\
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.channel2 = _mod,\
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ),\
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.scan_index = _index,\
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.scan_type = {\
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.sign = 's',\
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.realbits = 16,\
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.storagebits = 16,\
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.shift = 0,\
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.endianness = IIO_LE,\
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},\
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}
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/* It is defined here as it is a mixed timestamp */
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#define SSP_CHAN_TIMESTAMP(_si) { \
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.type = IIO_TIMESTAMP, \
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.channel = -1, \
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.scan_index = _si, \
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.scan_type = { \
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.sign = 's', \
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.realbits = 64, \
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.storagebits = 64, \
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}, \
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}
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#define SSP_MS_PER_S 1000
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#define SSP_INVERTED_SCALING_FACTOR 1000000U
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#define SSP_FACTOR_WITH_MS \
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(SSP_INVERTED_SCALING_FACTOR * SSP_MS_PER_S)
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int ssp_common_buffer_postenable(struct iio_dev *indio_dev);
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int ssp_common_buffer_postdisable(struct iio_dev *indio_dev);
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int ssp_common_process_data(struct iio_dev *indio_dev, void *buf,
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unsigned int len, int64_t timestamp);
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/* Converts time in ms to frequency */
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static inline void ssp_convert_to_freq(u32 time, int *integer_part,
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int *fractional)
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{
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if (time == 0) {
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*fractional = 0;
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*integer_part = 0;
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return;
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}
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*integer_part = SSP_FACTOR_WITH_MS / time;
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*fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR;
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*integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR;
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}
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/* Converts frequency to time in ms */
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static inline int ssp_convert_to_time(int integer_part, int fractional)
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{
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u64 value;
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value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional;
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if (value == 0)
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return 0;
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return div64_u64((u64)SSP_FACTOR_WITH_MS, value);
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}
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#endif /* __SSP_IIO_SENSOR_H__ */
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