+// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2008
* Stefan Roese, DENX Software Engineering, sr@denx.de.
*
* 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
*/
/*
#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];
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