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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__ */
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