mirror of
https://github.com/linux-sunxi/u-boot-sunxi.git
synced 2024-02-12 11:16:03 +08:00
9f9276c34c
Rename this function so that it is clear that it is provided by the RTC. Also return an error when it cannot function as expected. This is unlikely to occur since it works for dates since 1752 and many RTCs do not support such old dates. Still it is better to be accurate. Signed-off-by: Simon Glass <sjg@chromium.org> Acked-by: Heiko Schocher <hs@denx.de>
110 lines
2.1 KiB
C
110 lines
2.1 KiB
C
/*
|
|
* (C) Copyright 2008
|
|
* Gururaja Hebbar gururajakr@sanyo.co.in
|
|
*
|
|
* reference linux-2.6.20.6/drivers/rtc/rtc-pl031.c
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0+
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <rtc.h>
|
|
|
|
#if defined(CONFIG_CMD_DATE)
|
|
|
|
#ifndef CONFIG_SYS_RTC_PL031_BASE
|
|
#error CONFIG_SYS_RTC_PL031_BASE is not defined!
|
|
#endif
|
|
|
|
/*
|
|
* Register definitions
|
|
*/
|
|
#define RTC_DR 0x00 /* Data read register */
|
|
#define RTC_MR 0x04 /* Match register */
|
|
#define RTC_LR 0x08 /* Data load register */
|
|
#define RTC_CR 0x0c /* Control register */
|
|
#define RTC_IMSC 0x10 /* Interrupt mask and set register */
|
|
#define RTC_RIS 0x14 /* Raw interrupt status register */
|
|
#define RTC_MIS 0x18 /* Masked interrupt status register */
|
|
#define RTC_ICR 0x1c /* Interrupt clear register */
|
|
|
|
#define RTC_CR_START (1 << 0)
|
|
|
|
#define RTC_WRITE_REG(addr, val) \
|
|
(*(volatile unsigned int *)(CONFIG_SYS_RTC_PL031_BASE + (addr)) = (val))
|
|
#define RTC_READ_REG(addr) \
|
|
(*(volatile unsigned int *)(CONFIG_SYS_RTC_PL031_BASE + (addr)))
|
|
|
|
static int pl031_initted = 0;
|
|
|
|
/* Enable RTC Start in Control register*/
|
|
void rtc_init(void)
|
|
{
|
|
RTC_WRITE_REG(RTC_CR, RTC_CR_START);
|
|
|
|
pl031_initted = 1;
|
|
}
|
|
|
|
/*
|
|
* Reset the RTC. We set the date back to 1970-01-01.
|
|
*/
|
|
void rtc_reset(void)
|
|
{
|
|
RTC_WRITE_REG(RTC_LR, 0x00);
|
|
if(!pl031_initted)
|
|
rtc_init();
|
|
}
|
|
|
|
/*
|
|
* Set the RTC
|
|
*/
|
|
int rtc_set(struct rtc_time *tmp)
|
|
{
|
|
unsigned long tim;
|
|
|
|
if(!pl031_initted)
|
|
rtc_init();
|
|
|
|
if (tmp == NULL) {
|
|
puts("Error setting the date/time\n");
|
|
return -1;
|
|
}
|
|
|
|
/* Calculate number of seconds this incoming time represents */
|
|
tim = mktime(tmp->tm_year, tmp->tm_mon, tmp->tm_mday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
|
|
RTC_WRITE_REG(RTC_LR, tim);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Get the current time from the RTC
|
|
*/
|
|
int rtc_get(struct rtc_time *tmp)
|
|
{
|
|
ulong tim;
|
|
|
|
if(!pl031_initted)
|
|
rtc_init();
|
|
|
|
if (tmp == NULL) {
|
|
puts("Error getting the date/time\n");
|
|
return -1;
|
|
}
|
|
|
|
tim = RTC_READ_REG(RTC_DR);
|
|
|
|
rtc_to_tm(tim, tmp);
|
|
|
|
debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
|
|
tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
|
|
tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif
|