* based on a the Linux rtc-m41t80.c driver which is:
* Alexander Bigga <ab@mycable.de>, 2006 (c) mycable GmbH
*
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier: GPL-2.0+
*/
/*
#include <command.h>
#include <rtc.h>
#include <i2c.h>
-#include <bcd.h>
#if defined(CONFIG_CMD_DATE)
#define M41T62_FEATURE_HT (1 << 0)
#define M41T62_FEATURE_BL (1 << 1)
+#define M41T80_ALHOUR_HT (1 << 6) /* HT: Halt Update Bit */
+
int rtc_get(struct rtc_time *tm)
{
u8 buf[M41T62_DATETIME_REG_SIZE];
buf[0], buf[1], buf[2], buf[3],
buf[4], buf[5], buf[6], buf[7]);
- tm->tm_sec = BCD2BIN(buf[M41T62_REG_SEC] & 0x7f);
- tm->tm_min = BCD2BIN(buf[M41T62_REG_MIN] & 0x7f);
- tm->tm_hour = BCD2BIN(buf[M41T62_REG_HOUR] & 0x3f);
- tm->tm_mday = BCD2BIN(buf[M41T62_REG_DAY] & 0x3f);
+ tm->tm_sec = bcd2bin(buf[M41T62_REG_SEC] & 0x7f);
+ tm->tm_min = bcd2bin(buf[M41T62_REG_MIN] & 0x7f);
+ tm->tm_hour = bcd2bin(buf[M41T62_REG_HOUR] & 0x3f);
+ tm->tm_mday = bcd2bin(buf[M41T62_REG_DAY] & 0x3f);
tm->tm_wday = buf[M41T62_REG_WDAY] & 0x07;
- tm->tm_mon = BCD2BIN(buf[M41T62_REG_MON] & 0x1f);
+ tm->tm_mon = bcd2bin(buf[M41T62_REG_MON] & 0x1f);
/* assume 20YY not 19YY, and ignore the Century Bit */
/* U-Boot needs to add 1900 here */
- tm->tm_year = BCD2BIN(buf[M41T62_REG_YEAR]) + 100 + 1900;
+ tm->tm_year = bcd2bin(buf[M41T62_REG_YEAR]) + 100 + 1900;
debug("%s: tm is secs=%d, mins=%d, hours=%d, "
"mday=%d, mon=%d, year=%d, wday=%d\n",
/* Merge time-data and register flags into buf[0..7] */
buf[M41T62_REG_SSEC] = 0;
buf[M41T62_REG_SEC] =
- BIN2BCD(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f);
+ bin2bcd(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f);
buf[M41T62_REG_MIN] =
- BIN2BCD(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f);
+ bin2bcd(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f);
buf[M41T62_REG_HOUR] =
- BIN2BCD(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ;
+ bin2bcd(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ;
buf[M41T62_REG_WDAY] =
(tm->tm_wday & 0x07) | (buf[M41T62_REG_WDAY] & ~0x07);
buf[M41T62_REG_DAY] =
- BIN2BCD(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
+ bin2bcd(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
buf[M41T62_REG_MON] =
- BIN2BCD(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
+ bin2bcd(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
/* assume 20YY not 19YY */
- buf[M41T62_REG_YEAR] = BIN2BCD(tm->tm_year % 100);
+ buf[M41T62_REG_YEAR] = bin2bcd(tm->tm_year % 100);
if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE)) {
printf("I2C write failed in %s()\n", __func__);
void rtc_reset(void)
{
+ u8 val;
+
/*
- * Nothing to do
+ * M41T82: Make sure HT (Halt Update) bit is cleared.
+ * This bit is 0 in M41T62 so its save to clear it always.
*/
+ i2c_read(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
+ val &= ~M41T80_ALHOUR_HT;
+ i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
}
#endif