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https://github.com/AsahiLinux/u-boot
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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>
108 lines
2.8 KiB
C
108 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2011
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* Jason Cooper <u-boot@lakedaemon.net>
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*/
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/*
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* Date & Time support for Marvell Integrated RTC
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*/
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#include <common.h>
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#include <command.h>
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#include <rtc.h>
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#include <asm/io.h>
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#include "mvrtc.h"
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/* This RTC does not support century, so we assume 20 */
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#define CENTURY 20
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int rtc_get(struct rtc_time *t)
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{
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u32 time;
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u32 date;
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struct mvrtc_registers *mvrtc_regs;
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mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
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/* read the time register */
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time = readl(&mvrtc_regs->time);
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/* read the date register */
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date = readl(&mvrtc_regs->date);
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/* test for 12 hour clock (can't tell if it's am/pm) */
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if (time & MVRTC_HRFMT_MSK) {
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printf("Error: RTC in 12 hour mode, can't determine AM/PM.\n");
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return -1;
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}
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/* time */
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t->tm_sec = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK);
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t->tm_min = bcd2bin((time >> MVRTC_MIN_SFT) & MVRTC_MIN_MSK);
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t->tm_hour = bcd2bin((time >> MVRTC_HOUR_SFT) & MVRTC_HOUR_MSK);
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t->tm_wday = bcd2bin((time >> MVRTC_DAY_SFT) & MVRTC_DAY_MSK);
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t->tm_wday--;
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/* date */
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t->tm_mday = bcd2bin((date >> MVRTC_DATE_SFT) & MVRTC_DATE_MSK);
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t->tm_mon = bcd2bin((date >> MVRTC_MON_SFT) & MVRTC_MON_MSK);
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t->tm_year = bcd2bin((date >> MVRTC_YEAR_SFT) & MVRTC_YEAR_MSK);
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t->tm_year += CENTURY * 100;
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/* not supported in this RTC */
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t->tm_yday = 0;
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t->tm_isdst = 0;
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return 0;
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}
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int rtc_set(struct rtc_time *t)
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{
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u32 time = 0; /* sets hour format bit to zero, 24hr format. */
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u32 date = 0;
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struct mvrtc_registers *mvrtc_regs;
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mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
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/* check that this code isn't 80+ years old ;-) */
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if ((t->tm_year / 100) != CENTURY)
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printf("Warning: Only century %d supported.\n", CENTURY);
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/* time */
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time |= (bin2bcd(t->tm_sec) & MVRTC_SEC_MSK) << MVRTC_SEC_SFT;
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time |= (bin2bcd(t->tm_min) & MVRTC_MIN_MSK) << MVRTC_MIN_SFT;
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time |= (bin2bcd(t->tm_hour) & MVRTC_HOUR_MSK) << MVRTC_HOUR_SFT;
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time |= (bin2bcd(t->tm_wday + 1) & MVRTC_DAY_MSK) << MVRTC_DAY_SFT;
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/* date */
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date |= (bin2bcd(t->tm_mday) & MVRTC_DATE_MSK) << MVRTC_DATE_SFT;
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date |= (bin2bcd(t->tm_mon) & MVRTC_MON_MSK) << MVRTC_MON_SFT;
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date |= (bin2bcd(t->tm_year % 100) & MVRTC_YEAR_MSK) << MVRTC_YEAR_SFT;
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/* write the time register */
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writel(time, &mvrtc_regs->time);
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/* write the date register */
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writel(date, &mvrtc_regs->date);
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return 0;
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}
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void rtc_reset(void)
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{
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u32 time;
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u32 sec;
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struct mvrtc_registers *mvrtc_regs;
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mvrtc_regs = (struct mvrtc_registers *)KW_RTC_BASE;
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/* no init routine for this RTC needed, just check that it's working */
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time = readl(&mvrtc_regs->time);
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sec = bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK);
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udelay(1000000);
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time = readl(&mvrtc_regs->time);
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if (sec == bcd2bin((time >> MVRTC_SEC_SFT) & MVRTC_SEC_MSK))
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printf("Error: RTC did not increment.\n");
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}
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