u-boot/drivers/ddr/marvell/a38x/mv_ddr_common.c

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (C) Marvell International Ltd. and its affiliates
*/
#include "mv_ddr_common.h"
#include "ddr_ml_wrapper.h"
void mv_ddr_ver_print(void)
{
printf("%s %s\n", mv_ddr_version_string, mv_ddr_build_message);
}
/* ceiling division for positive integers */
unsigned int ceil_div(unsigned int x, unsigned int y)
{
return (x % y) ? (x / y + 1) : (x / y);
}
/*
* time to number of clocks calculation based on the rounding algorithm
* using 97.4% inverse factor per JEDEC Standard No. 21-C, 4.1.2.L-4:
* Serial Presence Detect (SPD) for DDR4 SDRAM Modules
*/
unsigned int time_to_nclk(unsigned int t, unsigned int tclk)
{
/* t & tclk parameters are in ps */
return ((unsigned long)t * 1000 / tclk + 974) / 1000;
}
/* round division of two positive integers to the nearest whole number */
int round_div(unsigned int dividend, unsigned int divisor, unsigned int *quotient)
{
if (quotient == NULL) {
printf("%s: error: NULL quotient pointer found\n", __func__);
return MV_FAIL;
}
if (divisor == 0) {
printf("%s: error: division by zero\n", __func__);
return MV_FAIL;
} else {
*quotient = (dividend + divisor / 2) / divisor;
}
return MV_OK;
}