X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Frtc%2Fm41t62.c;h=8721e7468ab615b37aac619a3e84fd1b6d10dad2;hb=55faa58976c74ebc7351a87c59568f05394ff7c5;hp=62c2446939607fcd89440303aa2ee3011ee03662;hpb=68ccfa482be0c7e4aa18285aceb214ed7f5d8e89;p=u-boot

diff --git a/drivers/rtc/m41t62.c b/drivers/rtc/m41t62.c
index 62c2446939..8721e7468a 100644
--- a/drivers/rtc/m41t62.c
+++ b/drivers/rtc/m41t62.c
@@ -63,6 +63,8 @@
 #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];
@@ -132,9 +134,15 @@ int rtc_set(struct rtc_time *tm)
 
 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