mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 09:48:16 +00:00
7ce6370982
MC13783 is a multifunction IS with an SPI interface to the host. This driver handles the RTC controller in this chip. Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2008, Guennadi Liakhovetski <lg@denx.de>
|
|
*
|
|
* 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>
|
|
#include <rtc.h>
|
|
#include <spi.h>
|
|
|
|
int rtc_get(struct rtc_time *rtc)
|
|
{
|
|
u32 day1, day2, time;
|
|
u32 reg;
|
|
int err, tim, i = 0;
|
|
|
|
spi_select(1, 0, SPI_MODE_2 | SPI_CS_HIGH);
|
|
|
|
do {
|
|
reg = 0x2c000000;
|
|
err = spi_xfer(0, 32, (uchar *)®, (uchar *)&day1);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
reg = 0x28000000;
|
|
err = spi_xfer(0, 32, (uchar *)®, (uchar *)&time);
|
|
|
|
if (err)
|
|
return err;
|
|
|
|
reg = 0x2c000000;
|
|
err = spi_xfer(0, 32, (uchar *)®, (uchar *)&day2);
|
|
|
|
if (err)
|
|
return err;
|
|
} while (day1 != day2 && i++ < 3);
|
|
|
|
tim = day1 * 86400 + time;
|
|
to_tm(tim, rtc);
|
|
|
|
rtc->tm_yday = 0;
|
|
rtc->tm_isdst = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rtc_set(struct rtc_time *rtc)
|
|
{
|
|
u32 time, day, reg;
|
|
|
|
time = mktime(rtc->tm_year, rtc->tm_mon, rtc->tm_mday,
|
|
rtc->tm_hour, rtc->tm_min, rtc->tm_sec);
|
|
day = time / 86400;
|
|
time %= 86400;
|
|
|
|
reg = 0x2c000000 | day | 0x80000000;
|
|
spi_xfer(0, 32, (uchar *)®, (uchar *)&day);
|
|
|
|
reg = 0x28000000 | time | 0x80000000;
|
|
spi_xfer(0, 32, (uchar *)®, (uchar *)&time);
|
|
}
|
|
|
|
void rtc_reset(void)
|
|
{
|
|
}
|