upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
58 lines
1.6 KiB
58 lines
1.6 KiB
14 years ago
|
/*
|
||
|
|
* Copyright 2011 Linaro Limited
|
||
|
|
* Aneesh V <aneesh@ti.com>
|
||
|
|
*
|
||
|
|
* See file CREDITS for list of people who contributed to this
|
||
|
|
* project.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License as
|
||
|
|
* published by the Free Software Foundation; either version 2 of
|
||
|
|
* the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* This program is distributed in the hope that it will be useful,
|
||
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
|
* GNU General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU General Public License
|
||
|
|
* along with this program; if not, write to the Free Software
|
||
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
|
||
|
|
* MA 02111-1307 USA
|
||
|
|
*/
|
||
|
|
#include <common.h>
|
||
|
|
static void do_cancel_out(u32 *num, u32 *den, u32 factor)
|
||
|
|
{
|
||
|
|
while (1) {
|
||
|
|
if (((*num)/factor*factor == (*num)) &&
|
||
|
|
((*den)/factor*factor == (*den))) {
|
||
|
|
(*num) /= factor;
|
||
|
|
(*den) /= factor;
|
||
|
|
} else
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Cancel out the denominator and numerator of a fraction
|
||
|
|
* to get smaller numerator and denominator.
|
||
|
|
*/
|
||
|
|
void cancel_out(u32 *num, u32 *den, u32 den_limit)
|
||
|
|
{
|
||
|
|
do_cancel_out(num, den, 2);
|
||
|
|
do_cancel_out(num, den, 3);
|
||
|
|
do_cancel_out(num, den, 5);
|
||
|
|
do_cancel_out(num, den, 7);
|
||
|
|
do_cancel_out(num, den, 11);
|
||
|
|
do_cancel_out(num, den, 13);
|
||
|
|
do_cancel_out(num, den, 17);
|
||
|
|
while ((*den) > den_limit) {
|
||
|
|
*num /= 2;
|
||
|
|
/*
|
||
|
|
* Round up the denominator so that the final fraction
|
||
|
|
* (num/den) is always <= the desired value
|
||
|
|
*/
|
||
|
|
*den = (*den + 1) / 2;
|
||
|
|
}
|
||
|
|
}
|