/* 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__ */