1 // SPDX-License-Identifier: GPL-2.0-only
41 static int measure_clock(struct adf_accel_dev *accel_dev, u32 *frequency)  in measure_clock()  argument
58 		delta_us = timespec_to_us(&ts2) - timespec_to_us(&ts1);  in measure_clock()
59 	} while (delta_us > MEASURE_CLOCK_DELTA_THRESHOLD_US && --tries);  in measure_clock()
63 		return -ETIMEDOUT;  in measure_clock()
74 			return -EIO;  in measure_clock()
77 		delta_us = timespec_to_us(&ts4) - timespec_to_us(&ts3);  in measure_clock()
78 	} while (delta_us > MEASURE_CLOCK_DELTA_THRESHOLD_US && --tries);  in measure_clock()
82 		return -ETIMEDOUT;  in measure_clock()
85 	delta_us = timespec_to_us(&ts3) - timespec_to_us(&ts1);  in measure_clock()
86 	temp = (timestamp2 - timestamp1) * ME_CLK_DIVIDER * 10;  in measure_clock()
90 	 * and avoid promoting r-value to 64-bit before division.  in measure_clock()
92 	*frequency = temp * (HZ_PER_MHZ / 10);  in measure_clock()
98  * adf_dev_measure_clock() - measures device clock frequency
100  * @frequency: Pointer to variable where result will be stored
101  * @min: Minimal allowed frequency value
102  * @max: Maximal allowed frequency value
104  * If the measurement result will go beyond the min/max thresholds the value
111  * * 0 - measurement succeed
112  * * -ETIMEDOUT - measurement failed
115 			  u32 *frequency, u32 min, u32 max)  in adf_dev_measure_clock()  argument
124 	*frequency = clamp(freq, min, max);  in adf_dev_measure_clock()
126 	if (*frequency != freq)  in adf_dev_measure_clock()
129 			 freq, *frequency);  in adf_dev_measure_clock()