mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +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>
122 lines
2.8 KiB
C
122 lines
2.8 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2001
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* Wolfgang Denk, DENX Software Engineering, wd@denx.de.
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*/
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/*
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* Date & Time support for Philips PCF8563 RTC
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*/
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/* #define DEBUG */
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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 <i2c.h>
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#if defined(CONFIG_CMD_DATE)
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static uchar rtc_read (uchar reg);
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static void rtc_write (uchar reg, uchar val);
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/* ------------------------------------------------------------------------- */
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int rtc_get (struct rtc_time *tmp)
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{
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int rel = 0;
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uchar sec, min, hour, mday, wday, mon_cent, year;
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sec = rtc_read (0x02);
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min = rtc_read (0x03);
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hour = rtc_read (0x04);
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mday = rtc_read (0x05);
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wday = rtc_read (0x06);
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mon_cent= rtc_read (0x07);
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year = rtc_read (0x08);
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debug ( "Get RTC year: %02x mon/cent: %02x mday: %02x wday: %02x "
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"hr: %02x min: %02x sec: %02x\n",
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year, mon_cent, mday, wday,
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hour, min, sec );
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debug ( "Alarms: wday: %02x day: %02x hour: %02x min: %02x\n",
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rtc_read (0x0C),
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rtc_read (0x0B),
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rtc_read (0x0A),
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rtc_read (0x09) );
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if (sec & 0x80) {
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puts ("### Warning: RTC Low Voltage - date/time not reliable\n");
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rel = -1;
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}
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tmp->tm_sec = bcd2bin (sec & 0x7F);
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tmp->tm_min = bcd2bin (min & 0x7F);
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tmp->tm_hour = bcd2bin (hour & 0x3F);
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tmp->tm_mday = bcd2bin (mday & 0x3F);
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tmp->tm_mon = bcd2bin (mon_cent & 0x1F);
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tmp->tm_year = bcd2bin (year) + ((mon_cent & 0x80) ? 1900 : 2000);
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tmp->tm_wday = bcd2bin (wday & 0x07);
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tmp->tm_yday = 0;
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tmp->tm_isdst= 0;
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debug ( "Get DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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return rel;
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}
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int rtc_set (struct rtc_time *tmp)
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{
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uchar century;
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debug ( "Set DATE: %4d-%02d-%02d (wday=%d) TIME: %2d:%02d:%02d\n",
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tmp->tm_year, tmp->tm_mon, tmp->tm_mday, tmp->tm_wday,
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tmp->tm_hour, tmp->tm_min, tmp->tm_sec);
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rtc_write (0x08, bin2bcd(tmp->tm_year % 100));
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century = (tmp->tm_year >= 2000) ? 0 : 0x80;
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rtc_write (0x07, bin2bcd(tmp->tm_mon) | century);
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rtc_write (0x06, bin2bcd(tmp->tm_wday));
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rtc_write (0x05, bin2bcd(tmp->tm_mday));
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rtc_write (0x04, bin2bcd(tmp->tm_hour));
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rtc_write (0x03, bin2bcd(tmp->tm_min ));
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rtc_write (0x02, bin2bcd(tmp->tm_sec ));
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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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/* clear all control & status registers */
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rtc_write (0x00, 0x00);
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rtc_write (0x01, 0x00);
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rtc_write (0x0D, 0x00);
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/* clear Voltage Low bit */
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rtc_write (0x02, rtc_read (0x02) & 0x7F);
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/* reset all alarms */
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rtc_write (0x09, 0x00);
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rtc_write (0x0A, 0x00);
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rtc_write (0x0B, 0x00);
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rtc_write (0x0C, 0x00);
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}
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/* ------------------------------------------------------------------------- */
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static uchar rtc_read (uchar reg)
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{
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return (i2c_reg_read (CONFIG_SYS_I2C_RTC_ADDR, reg));
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}
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static void rtc_write (uchar reg, uchar val)
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{
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i2c_reg_write (CONFIG_SYS_I2C_RTC_ADDR, reg, val);
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}
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#endif
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