cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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ssp_iio_sensor.h (1787B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __SSP_IIO_SENSOR_H__
      3#define __SSP_IIO_SENSOR_H__
      4
      5#define SSP_CHANNEL_AG(_type, _mod, _index) \
      6{ \
      7		.type = _type,\
      8		.modified = 1,\
      9		.channel2 = _mod,\
     10		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ),\
     11		.scan_index = _index,\
     12		.scan_type = {\
     13			.sign = 's',\
     14			.realbits = 16,\
     15			.storagebits = 16,\
     16			.shift = 0,\
     17			.endianness = IIO_LE,\
     18		},\
     19}
     20
     21/* It is defined here as it is a mixed timestamp */
     22#define SSP_CHAN_TIMESTAMP(_si) {					\
     23	.type = IIO_TIMESTAMP,						\
     24	.channel = -1,							\
     25	.scan_index = _si,						\
     26	.scan_type = {							\
     27		.sign = 's',						\
     28		.realbits = 64,						\
     29		.storagebits = 64,					\
     30		},							\
     31}
     32
     33#define SSP_MS_PER_S			1000
     34#define SSP_INVERTED_SCALING_FACTOR	1000000U
     35
     36#define SSP_FACTOR_WITH_MS \
     37	(SSP_INVERTED_SCALING_FACTOR * SSP_MS_PER_S)
     38
     39int ssp_common_buffer_postenable(struct iio_dev *indio_dev);
     40
     41int ssp_common_buffer_postdisable(struct iio_dev *indio_dev);
     42
     43int ssp_common_process_data(struct iio_dev *indio_dev, void *buf,
     44			    unsigned int len, int64_t timestamp);
     45
     46/* Converts time in ms to frequency */
     47static inline void ssp_convert_to_freq(u32 time, int *integer_part,
     48				       int *fractional)
     49{
     50	if (time == 0) {
     51		*fractional = 0;
     52		*integer_part = 0;
     53		return;
     54	}
     55
     56	*integer_part = SSP_FACTOR_WITH_MS / time;
     57	*fractional = *integer_part % SSP_INVERTED_SCALING_FACTOR;
     58	*integer_part = *integer_part / SSP_INVERTED_SCALING_FACTOR;
     59}
     60
     61/* Converts frequency to time in ms */
     62static inline int ssp_convert_to_time(int integer_part, int fractional)
     63{
     64	u64 value;
     65
     66	value = (u64)integer_part * SSP_INVERTED_SCALING_FACTOR + fractional;
     67	if (value == 0)
     68		return 0;
     69
     70	return div64_u64((u64)SSP_FACTOR_WITH_MS, value);
     71}
     72#endif /* __SSP_IIO_SENSOR_H__ */