mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-11 21:56:21 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* (C) Copyright 2010
|
|
* Reinhard Meyer, reinhard.meyer@emk-elektronik.de
|
|
*/
|
|
|
|
/*
|
|
* Date & Time support for the internal Real-time Timer
|
|
* of AT91SAM9260 and compatibles.
|
|
* Compatible with the LinuX rtc driver workaround:
|
|
* The RTT cannot be written to, but only reset.
|
|
* The actual time is the sum of RTT and one of
|
|
* the four GPBR registers.
|
|
*
|
|
* The at91sam9260 has 4 GPBR (0-3).
|
|
* For their typical use see at91_gpbr.h !
|
|
*
|
|
* make sure u-boot and kernel use the same GPBR !
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <rtc.h>
|
|
#include <asm/io.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/at91_rtt.h>
|
|
#include <asm/arch/at91_gpbr.h>
|
|
|
|
#if defined(CONFIG_CMD_DATE)
|
|
|
|
int rtc_get (struct rtc_time *tmp)
|
|
{
|
|
at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
ulong tim;
|
|
ulong tim2;
|
|
ulong off;
|
|
|
|
do {
|
|
tim = readl(&rtt->vr);
|
|
tim2 = readl(&rtt->vr);
|
|
} while (tim!=tim2);
|
|
off = readl(&gpbr->reg[AT91_GPBR_INDEX_TIMEOFF]);
|
|
/* off==0 means time is invalid, but we ignore that */
|
|
rtc_to_tm(tim+off, tmp);
|
|
return 0;
|
|
}
|
|
|
|
int rtc_set (struct rtc_time *tmp)
|
|
{
|
|
at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
ulong tim;
|
|
|
|
tim = rtc_mktime(tmp);
|
|
|
|
/* clear alarm, set prescaler to 32768, clear counter */
|
|
writel(32768+AT91_RTT_RTTRST, &rtt->mr);
|
|
writel(~0, &rtt->ar);
|
|
writel(tim, &gpbr->reg[AT91_GPBR_INDEX_TIMEOFF]);
|
|
/* wait for counter clear to happen, takes less than a 1/32768th second */
|
|
while (readl(&rtt->vr) != 0)
|
|
;
|
|
return 0;
|
|
}
|
|
|
|
void rtc_reset (void)
|
|
{
|
|
at91_rtt_t *rtt = (at91_rtt_t *) ATMEL_BASE_RTT;
|
|
at91_gpbr_t *gpbr = (at91_gpbr_t *) ATMEL_BASE_GPBR;
|
|
|
|
/* clear alarm, set prescaler to 32768, clear counter */
|
|
writel(32768+AT91_RTT_RTTRST, &rtt->mr);
|
|
writel(~0, &rtt->ar);
|
|
writel(0, &gpbr->reg[AT91_GPBR_INDEX_TIMEOFF]);
|
|
/* wait for counter clear to happen, takes less than a 1/32768th second */
|
|
while (readl(&rtt->vr) != 0)
|
|
;
|
|
}
|
|
|
|
#endif
|