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-rw-r--r--drivers/rtc/rtc-armada38x.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-armada38x.c b/drivers/rtc/rtc-armada38x.c
index cc542e6b1d5b..05997ea8fa48 100644
--- a/drivers/rtc/rtc-armada38x.c
+++ b/drivers/rtc/rtc-armada38x.c
@@ -448,6 +448,15 @@ static int armada38x_rtc_set_offset(struct device *dev, long offset)
return 0;
}
+static void armada38x_rtc_pre_register(struct rtc_device *rtc)
+{
+ /*
+ * The Armada 388 resets the prescaler when we write the time.
+ * Validated on clearfog.
+ */
+ rtc->set_offset_nsec = 0;
+}
+
static const struct rtc_class_ops armada38x_rtc_ops = {
.read_time = armada38x_rtc_read_time,
.set_time = armada38x_rtc_set_time,
@@ -456,6 +465,7 @@ static const struct rtc_class_ops armada38x_rtc_ops = {
.alarm_irq_enable = armada38x_rtc_alarm_irq_enable,
.read_offset = armada38x_rtc_read_offset,
.set_offset = armada38x_rtc_set_offset,
+ .pre_register = armada38x_rtc_pre_register,
};
static const struct armada38x_rtc_data armada38x_data = {