65 lines
1.2 KiB
C
65 lines
1.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Freescale i.MX27 RTC Driver
|
|
*
|
|
* Copyright (C) 2012 Philippe Reynes <tremyfr@yahoo.fr>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <rtc.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/imx-regs.h>
|
|
|
|
#define HOUR_SHIFT 8
|
|
#define HOUR_MASK 0x1f
|
|
#define MIN_SHIFT 0
|
|
#define MIN_MASK 0x3f
|
|
|
|
int rtc_get(struct rtc_time *time)
|
|
{
|
|
struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
|
|
uint32_t day, hour, min, sec;
|
|
|
|
day = readl(&rtc_regs->dayr);
|
|
hour = readl(&rtc_regs->hourmin);
|
|
sec = readl(&rtc_regs->seconds);
|
|
|
|
min = (hour >> MIN_SHIFT) & MIN_MASK;
|
|
hour = (hour >> HOUR_SHIFT) & HOUR_MASK;
|
|
|
|
sec += min * 60 + hour * 3600 + day * 24 * 3600;
|
|
|
|
rtc_to_tm(sec, time);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set(struct rtc_time *time)
|
|
{
|
|
struct rtc_regs *rtc_regs = (struct rtc_regs *)IMX_RTC_BASE;
|
|
uint32_t day, hour, min, sec;
|
|
|
|
sec = rtc_mktime(time);
|
|
|
|
day = sec / (24 * 3600);
|
|
sec = sec % (24 * 3600);
|
|
hour = sec / 3600;
|
|
sec = sec % 3600;
|
|
min = sec / 60;
|
|
sec = sec % 60;
|
|
|
|
hour = (hour & HOUR_MASK) << HOUR_SHIFT;
|
|
hour |= (min & MIN_MASK) << MIN_SHIFT;
|
|
|
|
writel(day, &rtc_regs->dayr);
|
|
writel(hour, &rtc_regs->hourmin);
|
|
writel(sec, &rtc_regs->seconds);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset(void)
|
|
{
|
|
/* nothing to do */
|
|
}
|