mirror of
https://github.com/AsahiLinux/u-boot
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65cc0e2a65
The rest of the unmigrated CONFIG symbols in the CONFIG_SYS namespace do not easily transition to Kconfig. In many cases they likely should come from the device tree instead. Move these out of CONFIG namespace and in to CFG namespace. Signed-off-by: Tom Rini <trini@konsulko.com> Reviewed-by: Simon Glass <sjg@chromium.org>
105 lines
2.5 KiB
C
105 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2004
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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 MAXIM MAX6900 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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#include <linux/delay.h>
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#ifndef CFG_SYS_I2C_RTC_ADDR
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#define CFG_SYS_I2C_RTC_ADDR 0x50
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#endif
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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 (CFG_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 (CFG_SYS_I2C_RTC_ADDR, reg, val);
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udelay(2500);
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}
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/* ------------------------------------------------------------------------- */
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int rtc_get (struct rtc_time *tmp)
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{
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uchar sec, min, hour, mday, wday, mon, cent, year;
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int retry = 1;
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do {
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sec = rtc_read (0x80);
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min = rtc_read (0x82);
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hour = rtc_read (0x84);
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mday = rtc_read (0x86);
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mon = rtc_read (0x88);
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wday = rtc_read (0x8a);
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year = rtc_read (0x8c);
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cent = rtc_read (0x92);
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/*
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* Check for seconds rollover
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*/
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if ((sec != 59) || (rtc_read(0x80) == sec)){
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retry = 0;
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}
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} while (retry);
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debug ( "Get RTC year: %02x mon: %02x 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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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 & 0x1F);
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tmp->tm_year = bcd2bin (year) + bcd2bin(cent) * 100;
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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 0;
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}
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int rtc_set (struct rtc_time *tmp)
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{
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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 (0x9E, 0x00);
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rtc_write (0x80, 0); /* Clear seconds to ensure no rollover */
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rtc_write (0x92, bin2bcd(tmp->tm_year / 100));
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rtc_write (0x8c, bin2bcd(tmp->tm_year % 100));
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rtc_write (0x8a, bin2bcd(tmp->tm_wday));
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rtc_write (0x88, bin2bcd(tmp->tm_mon));
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rtc_write (0x86, bin2bcd(tmp->tm_mday));
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rtc_write (0x84, bin2bcd(tmp->tm_hour));
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rtc_write (0x82, bin2bcd(tmp->tm_min ));
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rtc_write (0x80, 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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}
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